Refine Search

New Search

Results in Journal INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY: 127

(searched for: journal_id:(2693202))
Page of 3
Articles per Page
by
Show export options
  Select all
Kadek Diana Harmayani, Gede Adi Wiguna Sudiartha, I Wayan Budiarsa Suyasa
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5, pp 72-85; https://doi.org/10.25105/urbanenvirotech.v5i1.10748

Abstract:
PT. X is one of the ice companies in which its largest company is located in Bali, more precisely in the Pidada area, North Denpasar. Based on field observations the area is an area that has a calcareous soil structure. The water source of PT. X was extracted from the groundwater. From the field observation, it was found that the pipeline network, that connected the inlet water to water treatment system and ice production units, was severely covered by faint white scale. In order to discover the origin of this scale, water quality testing need to be carried out. From the results, it was found that the total hardness in the inlet water, taken from the groundwater tap, was 162.85 mg/l with calcium concentration of 2.15 mg/l and iron 3.83 mg/l. Water quality testing was also carried out in the water treatment unit consisting of resin softener where the total hardness surprisingly increased into 279.81 mg/l, calcium concentration was 2.96 mg/l, iron concentration was 0.55 mg/l. Even after being treated in softener resin, the total hardness increased sharply to 483 mg/l, which categorized as extreme hardness. The increase in total hardness indicates that there was a failure in the operation of the water treatment system, even it also contributed to the higher hardness and calcium concentration. This over-year’s treatment failure has been causing accumulation of hardness and calcium concentration in the compartment of both water treatment system and ice production unit that inflicts a higher hardness level in the effluent.
Melati Ferianita Fachrul, Astri Rinanti, Salmiati Salmiati, Thalia Sunaryo
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5, pp 86-103; https://doi.org/10.25105/urbanenvirotech.v5i1.10749

Abstract:
Aim: This research aims to determine the ability of indigenous microbial consortium in degrading Low Density Polyethylene (LDPE) plastics. The research start by preparing plastic into 1 x 1 cm2 size which was cut mechanically because the smaller the size of the plastic, the larger the surface area. The plastic is placed in a petri dish containing Nutrient Broth (NB) media. The variations used were bacterial composition (%) 10, 50, and 75, variations in temperature (°C) 25, 30, 35, variations in acidity values (pH) 5, 7, 9, and variations in contact time (Td) 10 days. LDPE plastic degradation was analyzed by gravimetric method, Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM). Both types of bacteria were resistant or insensitive to the presence of plastic compounds as xenobiotic substrates because there was no inhibition zone around the plastic samples and they were able to grow on Nutrient Agar (NA) media added with plastic samples. Based on the results of gravimetric and FTIR analysis, the highest removal value was at a temperature variation of 30°C and pH 7 with a bacterial composition of 75% (v/v) which was incubated for 10 days. Methodology and Results:The results of the gravimetric analysis showed that the weight loss in LDPE plastic was 0.1548 gr to 0.1464 gr or 5.47%, while the FTIR analysis showed the intensity removal result was 70.67%. Conclusion, significance, and impact of study: These results were confirmed again using Scanning Electron Microscope (SEM) analysis which showed morphological changes on the surface of LDPE plastic samples. Changes that occur in LDPE plastic samples incubated with indigenous microbial consortium are influenced by several factors, including temperature, pH, contact time, and the presence of bacteria as biodegradators.
Astri Rinanti
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5; https://doi.org/10.25105/urbanenvirotech.v5i1.10750

Astri Rinanti
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5; https://doi.org/10.25105/urbanenvirotech.v5i1.10752

Sugito Sugito, , Herlina Afiafani
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5, pp 14-27; https://doi.org/10.25105/urbanenvirotech.v5i1.10571

Abstract:
Hybrid Anaerobic Baffled Reactor (HABR) is a development technology from the Anaerobic Baffled Reactor (ABR), which was already known as a technology that is successful in treating domestic waste. Aims: The objectives of these studies were to investigate the efficiency of reducing BOD and phosphate levels in HABR with zeolite (ZE) and activated carbon (AC) media. Methodology and Results: HABR reactor made of acrylic material with a size of 90 cm x 20 cm x 30 cm. The reactor designed has 7 compartments, with details the first 5 compartments are suspended growth microorganism reactors and the next 2 compartments are attached growth microorganism reactors. Conclusion, significance, and impact of study: The result of the research showed that the efficiency of reducing BOD concentration in the reactor with ZE and AC media were 59.30% and 65.12%, respectively. The final BOD concentration in the AC reactor is 30 mg/L, this value meets the domestic wastewater quality standard required by East Java Governor Regulation Number 72 of 2013 concerning Wastewater Quality Standards for Industry and/or Other Business Activities. The final BOD concentration in the ZE reactor exceeded the required quality standard with a value of 35 mg/L. The final phosphate levels of the two reactors meet the wastewater quality standards for business and/or laundry activities with a maximum phosphate concentration of 10 mg/L. The final phosphate levels in the ZE and AC reactors were 3.74 mg/L and 8.79 mg/L, respectively. The efficiency of phosphate removal in ZE and AC reactors were 70.58% and 30.87%, respectively.
Muhammad Al Kholif, Joko Sutrinno, Indah Nurhayati, Retno Setianingrum
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5, pp 40-50; https://doi.org/10.25105/urbanenvirotech.v5i1.10572

Abstract:
Aboratory wastewater is produced through laboratory activities. Laboratory wastewater can have a large impact on the environment if it is not processed before being discharged into the water body. Laboratory waste treatment can be carried out using suspended growth technology to reduce pollutant loads, especially Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD). Aims: This study aims to treat wastewater produced by the activity of laboratory using suspended growth technology. Methodology and Results: This research was conducted by finding the most efficient rotor rotation in degrading the load of BOD5 and COD pollutants. The reactor used is a Mixed Flow Reactor type reactor made of acrylic material with a thickness of 5.5 mm. The reactor is arranged into three series with the same sampling time and different rotor turns that expressed in rotors per minute (rpm). The reactor series consists of Reactor I with 50 rpm rotor rotation speed, 100 rpm Reactor II and 150 rpm Reactor III. Processing is carried out using 8 hours of detention time and variation of sampling time every 8 hours. Conclusion, significant and impact study: From the results of the study obtained the highest level of effectiveness of reducing pollutant load on processing using 150 rpm rotor rotation and 40 hours sampling time which is 94.6% for BOD5 parameters and 94.4% for COD parameters.
Astri Rinanti, Melati Ferianita Fachrul, Rositayanti Hadisoebroto, Sinthya Desty, Rahmadhania Rahmadhania, Della Annisa Widyaningrum, Noor Aida Saad
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5, pp 51-71; https://doi.org/10.25105/urbanenvirotech.v5i1.10747

Abstract:
Industrial waste that contains heavy metal can cause environmental problem because of its toxicity, persistency and accumulation level in the environment. Biosorption process is highly influenced by temperature, pH, light, contact time, and ratio of surface area. Microalgae which possess two functional groups that are able to react on metal ion in a solution can be exploited to overcome environmental pollution due to heavy metal compound. Closed cultivation system in a photobioreactor is utilized to overcome contamination and evaporation problems on open pond system. Heavy metal analysis is conducted by utilizing Atomic Absorption Spectroscopy (AAS), Fourier Transform Infra-Red (FTIR), and Scanning Electron Microscope (SEM). This article provides information on biosorption as alternative technology to overcome heavy metal in water areas with no side effects on the environment with advantages of the absence of secondary pollutants, high level of efficiency, and relatively economic compared to physic-chemical method heavy metal removal methods
Astri Rinanti
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5; https://doi.org/10.25105/urbanenvirotech.v5i1.10751

Yureana Wijayanti, Markus Fittkow, Riana Ayu Kusumadewi, Oki Setyandito
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5, pp 28-39; https://doi.org/10.25105/urbanenvirotech.v5i1.10746

Abstract:
Groundwater quality evaluation is important to gain an insight of contamination source. It can later be utilized to review the implementation of a water resource management policy in a specific region. Aim: This study evaluate the short-term temporal variation of groundwater quality and its possible contamination source in Sleman, Yogyakarta. Methodology and Results: the statistical approach was utilized using boxplot, principle component analysis (PCA) and correlation matrices, to the data for 50 sampling sites. The data of groundwater quality are available from the local environmental authority of Environmental Agency Sleman.The box plots revealed that groundwater quality might largely influenced by rainfall in the area. The factor loading of PCA presented that the ratio of concentration of both chloride and TDS are the most varied of all samples, and the less variable parameter is fluoride. The pair of groundwater quality parameter which had strong correlation were varied in each year, except for TDS and chloride that showed strong correlation in all three years. Nitrite had strong correlation with iron in 2017 and, nitrite also had strong correlation with both manganese and fluoride in 2019. The existence of fluoride in correlation with other parameter might give an insight of contamination from livestock wastes, where in the study area there are many poultry and cow farms, and small scale chicken slaughter industries. Conclusion, significant and impact study: This study gives preliminary understanding on temporal variation of groundwater quality, for further research on groundwater quality in Sleman, Yogyakarta.
Yonik Meilawati Yustiani, Mia Nurkanti, Fadhlan Khusyairi Tarigan, Gatut Sudarjanto
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 5, pp 1-13; https://doi.org/10.25105/urbanenvirotech.v5i1.10740

Abstract:
River water quality modeling needs appropriate and suitable coefficients especially in application for specific river like urban river. Aim: This study aims to determine the value of the coefficient with a short term duration and a variable test time span. Several ways and methods of determining the rate of deoxygenation are developed according to the characteristics of the river and the environment. Modification method was applied in this research in which the test time span was unequal. The river chosen in this study is the Citepus River, Bandung, Indonesia representing an urban river in a tropical country. Methodology and Results: Sampling was carried out in the dry season. The laboratory analysis method used in determining the rate of deoxygenation uses the Slope Method of data from the short term incubation, which is ten days. The results showed that the Thomas Slope method's deoxygenation rate (K1) was 0.095 per day in the upstream segment, 0.917 per day in the middle segment, and 0.180 per day in the downstream segment. While the Ultimate BOD (La) value is 46.95 mg/l in the upstream segment, 38.70 mg/l in the middle segment, and 37.60 mg/l in the downstream segment. Conclusion, significance, and impact of study: The results of this study show that the value of the deoxygenation rate is similar to the theoretical surface water conditions. However, in the upstream segment, there is still a low deoxygenation rate value due to non-optimal activity of microorganisms. This findings will be very useful both in water quality modeling and river management.
Maya Fitri Oktarini, Adiyanto Johannes, Listen Prima
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4, pp 164-182; https://doi.org/10.25105/urbanenvirotech.v4i2.8305

Abstract:
Aim: This study examines the current living culture of riverbank residents by observing the choice of factual house and the house preferences. A house is the physical characteristic of cultural products indicating the current living culture. The riverbank settlements are part of the historical development of the city of Palembang. Methodology and Results: This research focuses on the physical form of residential buildings from the perspective of socio-cultural preservation. Restoring the characteristics of the riverbank area is a necessary potential. The design process can be directed toward technical innovation, social aspect and the use of materials that correspond to the features of the area. Furthermore, the cultural ecological interaction has created a living culture in the riverbank. This is evident in the constructed houses of residents with structure, technology, and material conforming to the fluctuating conditions of the ecosystem. The settlement’s characteristics generate an image of a river city, which have also become a tourist attraction in Palembang. However, the living culture has changed due to the innovation in building technology, the shift in the focus of development, and the availability of natural resources which diminish these features. Conclusion, significance and impact of study: This will encourage tourists to visit the developed areas with a preservation approach, integrating new cultural living with the conservation of the river city features for tourism interest. Furthermore, the preservation of tourism activities are not only unchanged, but also an adaptation flexibility to continuously look for new forms for the symbiosis between man and nature.
Shahida Mohd Sharif, Norsidah Ujang
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4, pp 125-141; https://doi.org/10.25105/urbanenvirotech.v4i2.7754

Abstract:
Aim: The aim of this concept paper is to identify a conceptual framework to investigate the level of social bonding/social attachment amongst participants of community gardening activity. It is estimated that more than 50% of the population would be living in urban areas by 2050. One of the drivers is the urban migration, where people are relocating themselves to new neighbourhoods, cities or countries often with the hope of better economic opportunities and social infrastructure, therefore changing the landscape of the new society and the place they reside. It is worrying as these people might not receive enough social support due to their limited social network. It could further escalate to social well-being problems such as individualism and social isolation and could later manifest mentally or psychologically as loneliness. Methodology and Results: This paper argues that the selection of the type of urban green spaces to be integrated into urban neighbourhoods is critical in addressing the well-being problems. Community gardens, as part of urban green spaces, offer meaningful social interaction opportunities, often being missed in the context of modern societies and urban lifestyle. Therefore, there is a need to review the effects of community gardening activities as an intervention strategy to strengthen the degree of social bonding to identify its capacity in integrating isolated people back into community life. Conclusion, significance and impact study: As a conclusion, urban designers and policymakers are suggested to adopt community gardens as a safe open space in cities to encourage more people-people-places interaction.
Adelia Anju Asmara, Suphia Rahmawati, Andik Yulianto, Margita Rahayu Abay, Dilla Arlina, Dhandhun Wacano
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4, pp 109-124; https://doi.org/10.25105/urbanenvirotech.v4i2.7624

Abstract:
Aim: This study aims to assess the entire process of septage management comprising regulation, operational procedures, finance, community involvement, and water quality analysis to maximize the initial and hugest human fecal sludge treatment called Faecal Sludge Treatment Plant (IPLT) in Yogyakarta. Methodology and Results: The Modified EHRA (Environmental Health Risk Assessment) method was applied which focused only on wastewater treatment aspect. Several regulations including standard quality methods (SNI) were utilized and made a comparison between baseline rules and obtained results. Furthermore, quality assessment was accomplished by observation and interview. The results showed that the human sector needs to improve not only the amount of operators but also urgently put up protective personal equipment during the suction process. The dissemination of attractive information about sludge suction service done by PUPKP as a representation of the local government among the dwellers ought to upgrade a lot. Technologies employed which are carriage transportation and vacuum machine, are good enough. Contrarily, septage treatment plants require extra-effort to enhance it as most water quality parameters barely meet the standard quality. BOD, COD, ammonia, total coliform, oil and grease do not meet the third class of water quality (Government Regulation of Republic of Indonesia No. 82/2001). Subsequently, the effectiveness of each unit i.e. anaerobic tank and stabilization ponds are under 50% and the loading rate has a maximum capacity of 87.5m3/day, and 60m3/day minimum capacity. Conclusion, significance and impact of study: Therefore, almost all aspects of septage management in Bantul Yogyakarta are required to improve
Yusraida Khairani Dalimunthe, Sugiatmo Kasmungin, Eddy Sugiarto, Lisa Sugiarti, Alyssa Lagrama
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4, pp 196-209; https://doi.org/10.25105/urbanenvirotech.v4i2.7417

Abstract:
Aims: This study aimed to increase the utilization of biomass-derived from the waste of coconut and peanut shells by making them as briquettes, as an alternative to fuel. The scarcity of petroleum because of its increasingly limited existence encourages all parties to take part in the development and discovery of new alternative energies. This is expected to overcome one of the most important of the many problems facing this country. The method used in this research is to start with a literature study of materials from various sources about the benefits and manufacturing of briquettes from biomass waste as an alternative energy source to be further tested for quality. This involves a heat test, water content test, ash content test and determination of the flying matter. Results: The test results showed that natural gas emissions were below threshold, namely 0-30 ppm CO, 0-3.6 ppm H2S, and undetectable NOx. After evaluation, the results showed that with the addition of 30% of the biomass, the ignition time was reduced and the remaining unburned briquettes or bottom ash was reduced by 68.68%. Conclusion, significance, and impact of study: The results help the community and the parties involved related to appropriate bio briquettes technology. It also eventually becomes one of the solutions to assist the government in solving problems related to alternative fuels to petroleum.
Yahya Muhammed Bah, Myrtati Dyah Artaria
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4, pp 142-163; https://doi.org/10.25105/urbanenvirotech.v4i2.8219

Abstract:
Aim: The fundamental rationale for a systematic literature review is to examine opportunities and challenges in the privatization of solid waste management, and share knowledge to spark and inspire a process that will usher in public private partnership to ensure cities are kept clean for habitability. Methodology and Results: A systematic review of the literature using information obtained from different sources was performed. The Google Search Engine was used to search for these articles. During the search numerous combinations of words and phrases were used to ensure articles reflect the most recent knowledge and scholarly works. Only peer-reviewed articles published after 2000 were selected, except extracts perceived to be of fundamental mileage to the study. However, articles published by staunch international organizations working in privatization of solid waste management for years which had produced indefatigable knowledge in the field were stealthily appraised. The privatization of solid waste management has resulted in some successes which include, but not restricted to: effectiveness, cost saving, timely service delivery, access to funding and expansion, quality services, partnership and community participation, cleanliness and healthy environment, jobs creation and better income, elimination of public monopoly and promotion of competition, new technologies and innovative techniques, public sector concentration on supervision, resources conservation and protection from risks; less bureaucracy and prompt action regarding concerns and complaints. Conclusion, significance and impact of study: With a well-thought model and proper public supervision, the privatization of solid of waste management can deliver habitable cities, though not without negative impacts and obstacles.
Rini Setiati, S Kasmungin, Sabrina S Riswati, Astri Rinanti, Jochanan Satriabudi
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4, pp 183-195; https://doi.org/10.25105/urbanenvirotech.v4i2.9195

Abstract:
Aims: This study aims to determine the synthesis of bagasse to form surfactants and evaluation of the performance of the sample to increase oil yield. Indonesia generates very large amounts of solid waste, without recycling or adequate management efforts to preserve the environment. Bagasse emerged as one of the most abundant biomass due to the operations of large plantations and factories. Furthermore, previous studies showed extensive uses in the fields of compost, animal feed, bioethanol energy, paper, and reinforced building materials. Methodology and Results: Lignin was extracted from bagasse to process sodium lignosulfonate surfactant (SLS surfactant). The synthesis was characterized several times, and certain examples showed significant HLB values, as a function of emulsion builder. This condition in the oil reservoir is required to reduce interface stress (IFT) and friction in the movement of particles. Another analyses involves the assessment of core flooding of specific synthetic core and crude samples. Conclusion, significance and impact of study: The results confirm the ability of surfactant bagasse to increase oil recovery, namely the HLB value of 11.6. The results also show the surfactant classification with the ability to form a middle-phase emulsion in order to increase petroleum products. Therefore, bagasse as solid waste has a performance effect on the process of increasing petroleum production.
I Gusti Agung Putu Eryani, Abd Muluk Abd Manan, Made Widya Jayantari
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4, pp 210-227; https://doi.org/10.25105/urbanenvirotech.v4i2.8862

Abstract:
Aims: This research will provide an overview of the comparative analysis of watershed characteristics in Bali which are differentiated from watersheds flowing to the north, and watersheds flowing to the south of Bali Province. The aim is to determine the characteristics of each, and proper sustainable management for each watershed. Methodology and Results: This is a descriptive, quantitative research that analyzes and compares the characteristics of the Saba watershed and Unda watershed, where the characteristics analyzed are morphometric and hydrological. From the analysis, it was observed that the Unda watershed, which has a flow direction to the south of the island of Bali, and the Saba watershed, flowing to the north of the island of Bali, possess several differences and similarities. The similarities include rainfall patterns, high temperatures, and the comparison values between Qmax and Qmin is significant. Meanwhile, the differences include the Saba watershed slope being steeper than the Unda watershed, and the Saba has young geomorphic features, while the Unda watershed possesses advanced geomorphic features. Conclusion, significance, and impact of study: Differences in watershed characteristics lead to differences in the management carried out. Furthermore, in terms of hydrology, where there are lesser differences, the sustainable management of the Saba and Unda Watershed also require conservation in form of a reservoir (weir or dam). This is to enable the storage of water in the rainy period for the dry season.
Ezekiel Oiganji, K. I. Dikam
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4; https://doi.org/10.25105/urbanenvirotech.v4i1.6768

Abstract:
Aim: This study was carried out to assess concentration status of someheavy metals in water along River Dilimi, Nigeria. The Nigerian inland waterbodies have been subjected to various forms of degradation due topollution. River Dilimi in Jos North of Plateau state capital is one of suchendangered inland water bodies. Activities around and in the river has ledto discharge of various heavy metal pollutants into the aquaticenvironment rendering water unsuitable for its intended purposes.Methodology and Results: Six (6) water samples were collected at theupper, centre and lower section of the river at the 20 and 120 cm depth, for every six (6) weeks making a total of eighteen (18) samples, Analyzed atNigerian Institute of Mining and Geosciences, Jos. The water samplescollected were pre-treated with few drops of concentrated Nitric acid, anddigested with Aqua-regia in the ratio of 3:1 for an hour. Different standardsolutions were prepared for AAS analysis under Beer-Lambert method ofmetal analysis using Atomic Absorption Spectrophotometer (AAS). Thedata obtained were subjected statistical analysis. The results obtained fromanalyzed water samples were alarming, iron, lead, cadmium andManganese were above the recommended threshold by 277, 6,400, 1,233and 580% accordingly, while zinc and copper were within permissible limit.Conclusion, significance and impact study: River Dilimi can be said to behighly concentrated with hazardous metals of concern like Fe, Pb, Cd andMn. This as a result of bioaccumulation will affect human and animalhealth, aquatic life and crop productivity.
Muhammad Burhannudinnur, Rosmalia Dita Nugraheni, Astri Rinanti
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4; https://doi.org/10.25105/urbanenvirotech.v4i1.8001

Abstract:
The recent eruption of Kesongo mud volcano (MV) that occurred in 28August 2020 in Blora, Central Java was a common natural phenomenon.MV eruption occurred periodically depending on the recharge fluid systemthat interconnected to a geothermal system and hydrocarbon reservoir.During the eruption, methane and CO2 gas were emitted to theatmosphere together with rocks, muds and fluids flowing from the fractureand fault system of MV. The extruded materials could be harmful andbeneficial for the affected ecosystem. Aims: This study aimed to addressthe potential impact of the extruded mud volcano materials to theenvironment. Methodology and Results: An attempt was carried out byinvestigating gas and fluid content of every mud volcano morphology in theselected 11 areas of Kradenan, Central Java and Sidoarjo, East Java. The pristine fluids and gas of MV were sampled for chemical and toxiccompound observation. Gas composition and type was observed using gaschromatography. The result shows that methane gas content ranges from0.06 to 67.6 mol%., while the CO2 content ranges from 0.21 to 79.9 mol%.Methane gas exhibits thermogenic gas that associated with hydrocarbongeneration. Conclusion, significance and impact study: The chemicalcompound of fluids indicates high Boron (B) content above 0.5 ppm whichhas harmful effect for crops and human health, but some compounds ofCa, Na, K, Mg present as essential elements for soil nutrient. According tothe methane flux and chemical compound emitted by mud volcano, thisstudy contributes to a management practice to restore and conserve the global ecosystem.
Gauri Singh, Ashok Kumar Singh
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4; https://doi.org/10.25105/urbanenvirotech.v4i1.8000

Abstract:
Aim: The effluent discharged from sugarcane molasses based distilleries causes environmental pollution due to its large volume and dark brown colour. The effluents also acifidys soils and causes harmful effects on agriculture crops. The objective of this work was the decolourization of molasses waste water from Doiwala sugar industry, Dehradun was done using different microbial consortiums. Methodology and Results: The microbial strains used in this study were obtained from IMTECH, Chandigarh. They were designated as A is E. coli, B is Pseudomonas aeruginosa, C is Staphylococcus aureus, D is Serritia odoriferae, E is Proteus vulgaris and F is Candida albicans. A total of six combinations were prepared using these strains i.e A+B, C+D, E+F, A+B+C, D+E+F and A+B+C+D+E+F. These consortiums were subjected to decolorization experiment of molasses waste water from Doiwala Sugar Factory, Dehradun, India at regular time interval by measuring the optical density. It was observed that at 7th day incubation in each case all consortiums showed maximum decolorization after which the percentage of decolorization was stable. It was also observed that the bacterial consortiums showed higher decolorization than the mixture of bacteria and fungi. Consortium C+D showed highest decolorization i.e. 89%. Conclusion, significance and impact study: it is recommended that industry should work with this consortium for decolorization of molasses containing wastewater to solve this environmental problem.
Adewumi A, Lasisi K H, Akinmusere O K, Ojo A O, Babatola J O
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4; https://doi.org/10.25105/urbanenvirotech.v4i1.8004

Abstract:
Aim: A comparative study of biogas production from three soluble solid wastes was conducted under anaerobic conditions by subjecting each waste to both conventional and electrolyzed digesters. Methodology and Results: Varying weight of each of the waste was mixed thoroughly with water and fed into five digesters. Three of these digesters were electrolytically-enhanced while the other two were not. The digestion of each of the wastes was monitored for 40 days at an ambient temperature ranging from 24 to 35oC. In all the digesters, biogas production started on the day 2, and attained maximum value on day 14 to17. Biogas production ended on the day 34 and 35 in digester 1a, 1b, 2a and 2b with production ending earliest in digester 3 containing wastewater on day 19. The highest biogas was produced in digester 2b containing electrolyzed digester loaded with poultry droppings) with a cumulative volume percentage of 91.41 as compared to its conventional state with a cumulative volume percentage of 85.19 and both states of the cow dung waste with cumulative volume percentages of 77.26 and 71.64 respectively. The least production occurred in digester 3 with a cumulative volume percentage of 4.59. Conclusion, significance and impact study: It is therefore concluded that poultry droppings has the greatest potentials for the generation of biogas as compared to cow dung in conventional and electrolyzed state and wastewater.
Marlin A Koan, Jakobis Johanis Messakh, Soetedjo In P
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4; https://doi.org/10.25105/urbanenvirotech.v4i1.8003

Abstract:
Aims: This study discusses water resources management based on water discharge potential of the Oebobo-Liliba watershed in Kupang City, East Nusa Tenggara, Indonesia. Methodology and Results: River water discharge was analyzed based on hydrological data of a span of 10-years. Average rainfall was calculated using the arithmetic mean method, and potential evapotranspiration (ETo) was calculated through Penman Modification with CROPWAT 8.0. The discharge analysis was conducted through a Mock method. Change in land cover was rendered using related land maps from year 2008 and 2018. Management of agricultural land was discussed through a descriptive analysis. The results showed an average monthly discharge of 0.667 m3/sec. The need for clean water is rendered to be 170 liters/person/day, and the discharge requirement of 90% = 281 liters/sec is concluded to be able to meet the community's clean water needs which amounts to 142,569 people. The total area of paddy fields is 5.38 Ha with water requirements of 1.5 liter/sec/ha, where 80% or 348 Liter/sec can be used to irrigate 232 hectares of paddy. Further results show that land cover in dryland forests decreased from 15% to 10%, settlements increased from 20% to 49%, and shrubs diminished from 20% to 0%. Conclusion, significance and impact study: The minimum debit trend shows a declining trend, while the maximum discharge trend shows an inclining trend. This research concludes that water discharge is adequate to meet community needs yet requires proper water resources management strategy from upstream to downstream of the watershed.
Elahe Mirabi, Nasrollahi Nazanin
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4; https://doi.org/10.25105/urbanenvirotech.v4i1.7151

Abstract:
Designing urban facades is considered as a major factor influencing issuessuch as natural ventilation of buildings and urban areas, radiations in theurban canyon for designing low-energy buildings, cooling demand forbuildings in urban area, and thermal comfort in urban streets. However, sofar, most studies on urban topics have been focused on flat facadeswithout details of urban layouts. Hence, the effect of urban facades withdetails such as the balcony and corbelling on thermal comfort conditionsand air flow behavior are discussed in this literature review. Aim: Thisstudy was carried out to investigate the effective factors of urban facades,including the effects of building configuration, geometry and urbancanyon’s orientation. Methodology and Results: According to the results,the air flow behavior is affected by a wide range of factors such as windconditions, urban geometry and wind direction. Urban façade geometrycan change outdoor air flow pattern, thermal comfort and solar access.Conclusion, significance and impact study: In particular, the geometry ofthe facade, such as indentation and protrusion, has a significant effect onthe air flow and thermal behavior in urban facades and can enhanceoutdoor comfort conditions. Also, Alternation in façade geometry canaffect pedestrians' comfort and buildings energy demands.
Anindrya Nastiti, Siska Widya D Kusumah, Mariana Marselina, Karina Nursyafira, Astrid Monica, Dharmawan Phan
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 4; https://doi.org/10.25105/urbanenvirotech.v4i1.7191

Abstract:
Aim: This paper aims to understand how the concept of risk and riskgovernance can be best articulated and integrated into Indonesia’s SEA.Attention regarding health risks emerging from human interactions withthe physical environment has increased in Sustainable Development andPlanning (SDP). Methodology and Results: Strategic EnvironmentAssessment (SEA) is the current context-based methodology addressingenvironmental and health risks of development planning in manycountries. Environmental and health risk assessment (EHRA) is anintegrated part of the SEA. EHRA, as a field of science, has evolved towardsspecific needs in many sectors, e.g. dose-response, quantitative microbialrisk assessment, ecological risk assessment. The main challenge is how todetermine the suitable EHRA approaches and translate the fact-basedEHRA into risk-informed strategies in SDP. In Indonesia, the SEA is mandatory for regional planning documents. However, there is limitedguidelines and application on EHRA in SEA. Through a meta-analysis, wereviewed scholarly articles published from 2009 to 2019 available inGoogle Scholar that report the concepts and implementation of EHRA andSEA in various countries. Conclusion, significance and study impact: Thisstudy has significant implications for the understanding of risk governancein SDP.
, Lenny Marilyn Estiaty
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 123-135; https://doi.org/10.25105/urbanenvirotech.v3i2.5110

Abstract:
Aim: This paper aims to explain the added value increasing method of reject coal which has not utilized by the company. Methodology and Results: The method to increase added value in this study used the agglomeration process of briquettes form that changing composition by adding biomass. The biomass functions to minimize bottom ash produced from burning briquettes so that the briquettes burn entirely. Stages processes in this study consist of characterization, briquetting, physical test, and chemical test. Based on the analysis, reject coal still has a high calorific value of 5,929 cal/gr. Shapes and sizes that were not following needs of coal market or consumer due to reject coal to be a waste. Briquettes have been successfully produced and meet specification requirements based on applicable regulations in Indonesia. Besides physical properties, the briquette meet density requirements which are greater than or equal to 1 gr/cm3 and shatter index value is less than 0.5%. The gas emission test shows below threshold, which is CO 0-30 ppm, H2S 0-3.6 ppm, and NOx is not detected. After evaluation, it showed that by adding 30% biomass, ignition time could be decreased and remaining unburned briquettes or bottom ash was reduced as much as 68.68%. Conclusion, significance and impact study: The bio-coal briquettes is a strategic solution to environmental problems and alternative energy sources that are environmentally friendly, because CO and H2S emissions are still below the threshold, even for NOx not detected. Making Bio-coal briquettes as a solution to the utilization of reject coal mining waste to be used as an alternative energy source has been successfully carried out.
, Tamado Sitorus, Hari Karyadi Oetomo, Doddy Abdassah, Luluan Almanna Lubis
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 149-163; https://doi.org/10.25105/urbanenvirotech.v3i2.6929

Abstract:
Flare gas is light hydrocarbon gas, by product of any petroleum industry activities, that is flared; and it could not pass into production facilities due its to low pressure. The gas flare volume frequently is significant, causing greenhouse gas emissions which gives serious environmental issue. Aims: The purpose of this research is to utilize flare gas in oil and gas fields to reduce environmental issue. Methodology and Results: Flare gas in an oil producing field is compressed to produce higher pressure gas flow, by using three one-stage Integrated Reciprocating Compressors to enter the production trunk line. The gas is flown to CO2 Removal Plant, as the gas would be gas sales. The subject field in West Java, the production wells experiences pressure decline; resulting the wellhead flowing pressure becomes low, so the gas is being flared. The gas flare recovery system is economically profitable both for purchase and rental scenarios. Renting the equipment is more profitable and has lower technical risk, because all risks is burdened to rental service provider. Conclusion, significance and impact study: Monetizing flare gas will reduce environmental issue, and it is utilized for own use or gas sales. The best Economics Scenario is rental scenario.
Rindang Ekawati, , Atlastieka Praptiwi
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 209-219; https://doi.org/10.25105/urbanenvirotech.v3i2.5840

Abstract:
Aim: This study aimed at comparing predictor variables associated with the environmental quality of first child. Since the beginning of 1987, Indonesian National Family Planning Board (BKKBN) has been discouraging early first marriage (marrying before 20 for females and before 25 for males). In 2016, BKKBN recommended ideal ages of marriage for females and males as old as 21 and 25 respectively. Methodology and Results: This study was a retrospective analysis involving 5 groups of data reported within the period of 1994-1997 (n=34,225), 1997-2000 (n=34,227), 2001-2004 (n=33,088), 2005-2009 (n=40,701), and 2009-2012 (n=45,607). Data were collected from the Indonesian Demographic and Health Survey datasets (SDKI [Survei Demografi dan Kesehatan Indonesia]). Data were analyzed using chi-square tests. Results indicated several variables that significantly contributed to the first child’s environment quality: (1) residential area (p value<0.05); (2) mother’s educational background (p value<0.05); (3) mother’s exposure to information media (p value<0.05); (4) mother’s employment status (significance were only found in two groups of data: 1994-1997 and 1997-2000 with each p value<0.05); (5) father’s educational background (p value<0.05). Conclusion, significance and impact of study: In conclusion, there was an inconsistency with regard to strong and weak potential factors of first child’s environment quality within an eighteen-year period. It is recommended to reassess the predictors. It is also important to develop strategies to improve marriage quality and family formation.
Faizal Rumagia, Mennofatria Boer, Rahmat Kurnia, Mohammad Mukhlis Kamal
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 136-148; https://doi.org/10.25105/urbanenvirotech.v3i2.5476

Abstract:
Aims: This study aims to assess the value sustainable development opportunity of the coral reef fisheries activities in Indonesia from the ecological, economic, and social aspect, with a case study of coral reef fisheries at the coastal area of Ternate Island, using the Sustainability Window (SuWi) approach. Methodology and Results: The data was collected from statistical data from relevant institutions and literature study, which consists of ecological, economic and social data, and analyzed using the Sustainability Window approach to determine the sustainability of the fisheries development. The result shows that the Sustainability Window of the coral reef fisheries in the research area tends to move towards sustainable development, where the national policy in catch fisheries management has an impact on the sustainable development and management of coral reef fisheries at the coastal area of Ternate Island. Conclusion, significance and impact study: The Sustainability Window of coral reef fisheries at the coastal area of Ternate Island tends to move towards sustainable processes, with the width of sustainability window that not too narrow to the coral reef fisheries activities at the provincial and national levels. This condition attaches strings to a precautionary approach in policy decision for the management process, and consideration to the effect that can result from the development policy, both at the provincial and national level. The use of Sustainability Windows approach can provide a new simple way for assessing whether the development has been towards a more sustainable direction or not.
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 177-208; https://doi.org/10.25105/urbanenvirotech.v3i2.5237

Abstract:
Aim: The purpose of this paper is to review the trends in the application of geospatial technology in urban morphology data capture and studies. Methodology and Results: This review was guided by critical thinking research approach, which involves analysis of relevant literature on a phenomenon to enable to draw conclusion(s) on whether a claim is true, sometimes true, partly true or false and using methods to applied in critical thinking include broad intellectual criteria such as clarity, credibility, accuracy, precision, relevance, depth, significance and fairness. The results show that increasing urbanization and sub-optimal locations of urban amenities and utilities has resulted in many cities facing environmental, land use and socio-economic challenges. This can be mitigated by the implementation of cost-effective urban development plans and policies together with an in-depth understanding of the interactions existing between urban natural and human systems, an undertaking reliably aided by geospatial technologies notably Remote Sensing, Geographical Information Systems, Global Positioning System and Photogrammetry. Conclusion, significance, and impact study: This paper is therefore anchored on an understanding of urban morphology, factors determining its changes over time and demonstrated achievements of the utility of geospatial technology in the study of the same with policy implications for the applications of the geospatial technology in urban studies.
, Sugito Sugito
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 164-176; https://doi.org/10.25105/urbanenvirotech.v3i2.5795

Abstract:
The process of aerobic composting the slaughterhouse (SH) solid waste generate ammonia emissions. Aim: The objective of this research to study the ability of the adsorbent to use zeolite to reduce ammonia gas emissions during the composting process of SH solid waste. Methodology and Results: Reduction of ammonia emission is conducted during the aerobic composting process which is 50 days. The raw material composition of the composting process used was 100% rumen contents, 60% rumen contents: 40% straw, 50% rumen contents: 50% straw, and 40% rumen contents: 60% straw. Zeolite used in the form of granular size 100 mesh. The result of the research showed that the level of release of ammonia gas emissions during the composting process could be reduced by zeolite. Conclusion, significance, and impact study: The efficiency of reducing ammonia gas emissions using zeolite adsorbents in the composting process of SH solid waste ranges from 98.09 - 99.40% on average. Zeolite is an adsorbent that has high adsorption power because it has many pores and has a high ion exchange high capacity and serves as an absorbent cation that can cause environmental pollution.
, Ake Wihadanto
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 220-231; https://doi.org/10.25105/urbanenvirotech.v3i2.6720

Abstract:
Aim: The objective of this paper is to review the impact of poor sanitation on global tourism development. Methodology and Results: The majority of the data for this study was sourced from World Development Indicators (WDI) dataset for more than 200 countries in 2014 from the World Bank. A regression analysis was applied to analyze the impact of access to improved sanitation on tourism development by using some indicators such as the number of tourist arrivals, the proportion of the population using improved sanitation facilities, and the proportion of the population using improved water facilities. The study found that the relationship between the proportion of the population using improved sanitation facilities and the number of tourist arrivals is significant. Poor sanitation has been shown to have huge negative impacts on public health and the economy. In terms of the economic impacts, the lack of access to improved sanitation causes economic losses related to the direct costs of treating sanitation-related diseases and the indirect cost of lost income through reduced productivity. Conclusion, significance, and impact study: Access to basic sanitation facilities is regarded as one of the aspects that should be considered to support the tourism industry, particularly in developing countries. This study suggests that providing sanitation is the best investment for promoting tourism. Decision-makers should act now, and in a concerted way, to provide adequate sanitation services and at the same time sustaining tourism growth as an essential aspect of a country’s economy.
Mochammad Fariq Yogaswara, Iwan Juwana, Yenita Sandra Sari, Haroon Bakari
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 67-83; https://doi.org/10.25105/urbanenvirotech.v3i1.5569

Abstract:
Sub Watershed of Cibabat is one of the rivers included in the Citarum Hulu River, which is located in Cimahi City. The industrial sector is one of the biggest contributors to the pollutant load that falls into the Sub Watershed of Cibabat. The number of industries in the Sub Watershed of Cibabat is 36 industries with different types of industries. Aims: This study was aimed to analyze the pollutant load entering the Cibabat River in existing conditions and projections especially those caused by the industrial sector. Besides, this study has never been conducted, so it was necessary to conduct a study of the pollution load capacity in the Sub Watershed of Cibabat, Methodology and results: The calculation of industrial sector pollution load was done by calculating the date of discharge, concentration, number of employees, number of products and emission factors (EF). The industrial sector pollution load in Sub Watershed of Cibabat in 2018 was 3,518.82 kg/day TSS, 8,231.83 kg/day BOD and 14,467.68 kg/day COD. The industrial sector pollution load in Sub Watershed of Cibabat in the projection year was 3,885.06 kg/day TSS, 9,088.61 kg/day BOD and 15,973.48 kg/day COD.
, Iga Yusmaidah Siregar, Indriyani Rachman, Toru Matsumoto
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 28-46; https://doi.org/10.25105/urbanenvirotech.v3i1.5473

Abstract:
Aims: This study aims to investigate the material flow of waste bank activities in Medan Methodology and results: A semi-structured interview survey approach was conducted to collect the data. Applying MFA methodology, the result of this study found that of the total amount of the input material, 87.4% is a recyclable waste, and 12.6% is water. While, the waste bank activities generate 87.2% recyclable items, 12.6% wastewater and 0.2% residues. Conclusion, significance and impact study: The findings are essential to understand the use of resources in order to provide information for improving waste bank activities and waste management. This study found that the activities of waste banks are still traditional, which is lack of technology adoption. In the future, the waste bank should be more efficient and able to manage large amounts of wastes, because the potential for recyclable wastes is still available and abundant.
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 47-66; https://doi.org/10.25105/urbanenvirotech.v3i1.5520

Abstract:
The increasing anthropogenic activities as a result of significant growth in population, urbanization, and industrialization has resulted in a tremendous amount of municipal solid waste (MSW). The municipal authorities are under extreme pressure from the epidemiological evidence towards human and environment as a result of injudicious waste disposal to landfills without any material recovery. In this article, the current status and limitations in treating MSW by the developing countries have been overviewed with a case study from Peshawar-Pakistan. The daily waste production in Peshawar city is about 650.8 tons with 0.4 kg/capita/day. Among the total waste, food waste contributes 14.3% fallowed by plastic waste (4%), paper (2.7%), glass (1.2%), wood (1.1%) and metals/rubber (0.6%). The waste collection efficiency is very low and about 40% of waste are collected whereas 60% of the waste remains in streets or at collection points. Currently there well-organized and specialized waste management practices such as composting, incineration, gasification, pyrolysis, biological treatment, and recycling for treating waste according to environmental deliberation. The directives of the developed countries had strictly imposed the regulations to increase the waste recycling and material recovery whereas in the developing countries the lack of proper legislation, planning, awareness regarding waste reduction has worsened the municipal solid waste-related problems. Moreover, in this article, an attempt has been made towards various important steps that need to incorporate in formulating the strategy for sustainable MSW management along with various aspects for their assessment in term of their sustainability in the developing countries.
, Maryani Paramita Astuti, Temmy Wikaningrum
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 84-102; https://doi.org/10.25105/urbanenvirotech.v3i1.5530

Abstract:
Aims: This study was aimed to compare the secured landfill method and thermally sludge treatment through gasification, to find out the environmental impacts that will result from both treatments. Methodology and results: The study was carried out using the “gate-to-gate LCA method”. In its implementation, limits and assumptions have been determined as an approach to the actual condition. Some of the data used include the experimental data, theoretical mass balance calculation and secondary data obtained from previous research. The study was carried out utilizing the open-source openLCA software. The four-phase in the LCA include goal and scope definition, inventory analysis, impact assessment, and data interpretation. The simulation shows that the implementation of the thermal gasification process can reduce the emission released to the atmosphere by reducing hazardous sludge volume to be transported directly to the secured landfill. Conclusion, significance and impact study: Referring to the simulation results using openLCA software, with several assumptions and adjustments made, in the scope of the study that has been determined. It can be concluded that the thermal (gasification) treatment of hazardous sludge can be studied further in connection with its implementation at the treatment plant. It is indicated by the acquisition of global warming potential impact category of 673 kg CO2 eq (for direct disposal to secured landfill) reduced around 424 kg CO2 eq (for the implementation of thermal treatment). Or in other words, there is a reduction in the magnitude of the impact to around 37%.
M. N. Okeke, , C. N. Eze
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 13-27; https://doi.org/10.25105/urbanenvirotech.v3i1.5798

Abstract:
Aims: The purpose of this project is to find the concentration of heavy metals (Cu, Zn, Pb, As, Cr, Ni, Cd, Fe and Mn) in the top soil and the plant around the waste dumpsite from Enugu municipal solid waste disposal sites. Methodology and results: This was done through collection of soil samples from four designated public municipal solid waste dump sites (Ngwo Umueze, Presidential, New-market and Emene) in Enugu metropolis. The soil samples were collected at 10 metres intervals away from the centre location point of each dump site at constant depth (0 - 15 cm were mixed together and sample picked from it). The samples collection design are as follows: centre (0m) of the dump sites, 10 metres, 20 metres, 30 metres and the control sample which measured 65 metres away from the centre of dumpsites at the same depth. Plant samples were taken just at the centre (0m) and control measures which is at 65 meters distance away from each dump sites. The Goat grasses harvested were taken to the lab to check and analyse its heavy metals intake from the soil. These samples were analysed using atomic absorption spectrophotometer (AA320N) model. On the average, high concentrations of Zn, Fe, Mn, Cu, and Pb were found in the soil samples collected at the centre of the dump sites as 141.70, 121.5, 75.53, 70.33 and 64.53mg/kg respectively. The lower concentrations were obtained in the soil samples taken at the control site which 65 metres distance away from the centre of the four dump sites as 12.00, 81.55, 8.70, 9.56 and 6.51mg/kg for Zn, Fe, Mn, Cu, and Pb respectively. In the plant sample, concentration of Fe (98.00 mg/kg) was found to be the highest in the root at New market dumpsites, while Nil concentration of as (Nil mg/kg) was the least value at Emene from the control distance. Conclusion, significance and impact study: SPSS statistical package was used to find out the significant differences between the treatments mean (heavy metals). The result shows that the heavy metals analyses were within the acceptable or permissible limit by WHO/FAO.
, Ade Ariesmayana, Agung Sudrajad, Irvan Nurhakim, Deni Ihwanudin Firdaus
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 103-122; https://doi.org/10.25105/urbanenvirotech.v3i1.5478

Abstract:
Aim: This study aims to determine the potency of horsetail plant to remove heavy metal concentration. Methodology and Results: There are 54 horsetail which are divided into three batches for experimental design by varying number of plants. The first batch used 12 plants, the second batch used 18 plants, and the third batch used 24 plants. The research furthermore used the experimental method with the subsurface flow system treatment. The sample was taken and observed for seven days, with two samplings daily. The results therefore showed that the first batch gave a 6.83% impact on reducing concentration Fe, a batch at 10.28%, and batch three at 16.26%. The average of reducing concentration Fe reached approximately 11%. Therefore, the detention of the process of leachate constructed wetland reactors could significantly reduce Fe contaminant in leachate. Conclusion, significance, and impact of study: This research provides a solution to mitigate the environment by adopting the accumulator of Horsetail plants (Equisetem hyemale) in the constructed wetlands reactor experiment. From the three reactors about 0.03 mg/L of heavy metal iron was removed after a seven day run. Therefore, aquatic plants showed a positive impact in reducing environmental pollution a trend that can be adopted in wastewater and leachate treatment technology in Indonesia.
, Gita Prajati, Anshah Silmi Afifah, Muhammad Rizki Apritama, Yosef Adicita
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 3, pp 1-12; https://doi.org/10.25105/urbanenvirotech.v3i1.5095

Abstract:
Aims: This study was aimed to determine the efficiency and characteristics of the pig wastewater treatment using ABR with the addition of effective microorganism4 (EM4) as bio-activator during the startup process (R1) and without EM4 (R2). Methodology and results: Piggery wastewater is poured into ABR with 12 hours HRT (hydraulic retention time) and reduced to 6 hours after the concentration in ABR is stable. COD removal efficiency when 12 hours HRT reach 60% (R1), and 51% (R2). The results did not change significantly, when 6 hours HRT COD efficiency were 57.8% (R1) and 51.3% (R2). The biomass growth rate at R1 is faster than R2 with Food to Microorganism ratio (F/M) 0.4-0.89 (R1) and 0.68-1.38 (R2). The yield value of methane gas formation in the study showed a value of 0.25-0.28 L-CH4/g-COD removed. Conclusion, significance and impact study: Advanced wastewater treatment is needed to improve effluent’s quality for water reuse from piggery wastewater. The addition of EM4 can improve the COD efficiency removal and biomass growth.
, Titien Sotiyorini, Ni’Matul Janah
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 189-200; https://doi.org/10.25105/urbanenvirotech.v0i0.4359

Abstract:
Aim: This study aims to identify the characteristics and generation of municipal solid waste (MSW) in Banyuwangi. Methodology and Results: The solid waste characterization was carried out in two areas in Banyuwangi, referring to the Indonesian National Standard (Standar Nasional Indonesia/SNI) 19-3964-1995. The results show that the highest composition is organics of 36% (39% from households/HSW and 35.35% from Non-HSW). The highest solid waste (SW) generation from industrial areas and train station are 0.61 and 1.38 kg/population.day, respectively, while the SW density from the bus station is 375.46 kg/m3. The weight, volume, and density of household solid waste (HSW) are 0.17 kg/population.day, 2.02 L/population.day, and 81.07 kg/m3, respectively. The population of Zone 1 and Zone 2 is 142.054 in 2016, generating 8,814 tons of HSW per year (tpy). Conclusion, significance and impact study: The main MSW compositions in Banyuwangi are organics (36%), plastics (17.20%), and papers (15.78%). Household solid waste generation in Banyuwangi reaches 8.8 tons per year with the primary compositions of 39% organics, 18.92% residues, 18.4% papers, and 14.4% plastics. The highest number of residue defines that 81% of solid waste can be recycled.
, Liliya Dewi, Aulia Nur Mustaqiman, Tyas Roro Anggraini Kyai Marjo
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 164-180; https://doi.org/10.25105/urbanenvirotech.v0i0.4361

Abstract:
Aim: The purpose of this study was to determine the status of water quality in a river by using the Pollution Index method as stated in the Decree of the Minister of Environment No. 115/2003 regarding Guidelines for Determining the Status of Water Quality and to determine the effect of quality status on development efforts towards ecotourism. Methodology and Results: The measurement of water quality was carried out at two points, namely T1 (upstream) and T2 (downstream) points. The parameters included BOD, COD, DO, TSS, Temperature, pH, Zn, S, P, No3, and No2. From the test results for class I, II, and III criteria, almost all parameters exceeded the quality standard. The status of the river water quality, according to the Pollution Index, has increased from moderate polluted upstream and heavily polluted to certain parameters downstream. Conclusion, significance and impact study: The quality standards that are met for the river are criteria for class IV. The increase in pollution is indicated by human activity around the river which is characterized by increasing population and land use in agriculture and plantations. The increasing pollution reduces the quality of the river if it is developed into an ecotourism area due to its low water quality status.
, Temmy Wikaningrum
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 146-163; https://doi.org/10.25105/urbanenvirotech.v0i0.4362

Abstract:
Aim: This study aims to observe the potential implementation of analytical methods based on digital image processing as an alternative method of colorimetric analysis that can be implemented in site. Methodology and Results: Pt-Co standard series solutions at concentrations of 5, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 concentration units (CU) were measured by spectrophotometric method and digitally enhanced colorimetric (DEC) method to obtain a response in the form of absorbance (Abs) and area under curve (AUC) value. Absorbance measurement was carried out at 317.5 nm (λ max). The AUC value was obtained from the 3-point RGB value measurements, made average so that a color band is produced, then quantified by translating the color band intensity into the response curve in ImageJ software. The Abs and AUC values of artificial samples are processed into CU values with linear equations resulting from linear regression test. The results of the calculation of CU values from the two measurement methods were tested using independent t test method to examine significant differences between the two measurement methods. Conclusion, significance and impact study: Coefficient of determination (R2) plot CU VS AUC = 0.8638, in independent t test was obtained p-value = 0.4246 at the 95% confidence level. Therefore, it can be concluded that digitally enhanced colorimetric could be used to determine water quality, especially color parameter in site measurement.
Nishi Verma, Martin Anda, Yureana Wijayanti
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 120-133; https://doi.org/10.25105/urbanenvirotech.v0i0.4364

Abstract:
Aim: This study investigates the development of a sustainable groundwater management strategy in Yogyakarta province through groundwater recharge technologies. This study also compares technologies used in the province and the one already implemented in Perth due to its similar nature in site geology and hydrogeology. Methodology and Results: Primary and secondary data were collected and analyzed. Water depth and hydraulic conductivity data were analyzed using permeameter and GIS program. GIS image analysis of water depth and hydraulic conductivity suggested that the placement of potential aquifer recharge sites would be best suited in the north-east part of the province, slightly outside the study area, to provide water for all. Two recharge schemes of an infiltration basin and an injection well with storm water detention tank were proposed. The injection well was decided upon, despite its higher cost, due to the impermeability of soils in Yogyakarta and possible water seepage to the environment. Similar to Perth’s Hartfield park scheme, an injection well would directly bypass these soil layers to recharge the aquifers with rainwater and storm water. Hartfield Park injects 4400 kL of water/year. Conclusion, significance and impact study: The findings of this study indicate aquifer recharge is a possible solution to overcome Yogyakarta’s high abstraction. Further studies recommend that injection well trials are further developed in terms of location, depth and sizing.
Aulia Ramandha, Wisnu Eka Yulyanto,
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 181-188; https://doi.org/10.25105/urbanenvirotech.v0i0.4360

Abstract:
Aim: The aim of this study is to design noise barrier shapes and to investigate its effectiveness in reducing traffic noise at one public school in Indonesia. Methodology and Results: Two types of barriers were designed on a laboratory scale using plywood materials and the noise level was measured using Noise Analyzer Briiel and Kjaer Type 2250. Noise reduction was analyzed by using the Insertion Loss method based on the difference of the noise level before and after implementing the barrier. The results show that the barrier Type II with a length of 200 cm, a receiver height of 30 cm, and a curved shape of 45° angle (Type L) is more effective in reducing the noise than the other variation of barrier shape and length. Barrier Type L (Type II) can reduce the noise at high frequency between 1–8 kHz with an Insertion Loss value of 6.9–27.9 dB. Conclusion, significance and impact study: The noise barrier Type II, with specifications of 20 m length, 3 m height, and barrier material of reinforced concrete, is recommended to be used at the high school to reduce the road traffic noise.
, Sirin Fairus, Nadya Nurul Amelinda
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 134-145; https://doi.org/10.25105/urbanenvirotech.v0i0.4363

Abstract:
Aim: The aim of this study is to determine the most effective type and concentration of coagulant to reduce TDS, TSS, BOD and COD Sumur Batu Fecal Treatment Plant or Instalasi Pengolahan Lumpur Tinja (IPLT) Sumur Batu. Methodology and Results: Using the jar test method at a laboratory scale, the types of coagulants of PAC, Alum and FeSO4 with varied concentration of 70 mg/L, 137.5 mg/L and 200 mg/L were used. Additionally, Polyacrylamide was also used in the study with concentration varied between 0.1 mg/L, 0.6 mg/L, and 1.1 mg/L adjusted to the concentration in the field. Conclusion, significance and impact study: Results showed that Alum with a concentration of 200 mg/L was the most effective coagulant, with removal efficiency for each parameter is as follows TDS = 82.17%, TSS = 67.69%, BOD = 60.16%, and COD = 59.76%.
, Kania Salmaa
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 102-119; https://doi.org/10.25105/urbanenvirotech.v0i0.4365

Abstract:
Aim: This study aims to evaluate the practice of waste management system conducted by community and business units in one traditional village in Bali and to discover the contributing factors to the success of the practice. Methodology and Results: A set of waste sampling method, observation, and interview were conducted to collect the basis data for the data calculation and analysis. The results show that the waste generation in Padangtegal Village currently reaches 38.18 m3/day or 1145.41 m3/month, with the largest weight composition from leaves and twigs waste (39.87%), food waste (29.07 %), and plastic (13.11%). With 100% of waste handling service, the processing of waste carried out in the area only reached 5.06% of 3R behavior (reduce, reuse, and recycle) at the source, and 1.10% composting at the composting house (Rumah Kompos). Conclusion, significance and impact study: Most of the processing carried out at Temesi Recycling is through composting (33.98%) and recovery of recycled material (33.68%), resulting in a residue (26.19%) which is transported to the Suwung Landfill. It could be concluded that organic waste processing through composting and recycling non-organic waste could reduce waste volume transported to the landfill about 67%.
Astri Rinanti
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2; https://doi.org/10.25105/urbanenvirotech.v2i1.3558

Ratih Pratiwi, Ps Dyah Prinajati
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 35-46; https://doi.org/10.25105/urbanenvirotech.v2i1.3554

Abstract:
Aim: The objective of this study is to obtain the optimum efficiency of Lead (Pb) removal by adsorption using shrimp shells chitosan. Adsorption is one of the alternative ways to treat heavy metal. Various substances can be used as adsorbents for the adsorption process. One of the natural adsorbents that can be utilized is shrimp shells. Methodology and Results: In general, the process of making chitin into chitosan includes demineralization with dilute HCl, deproteinization with dilute NaOH, then deacetylation of chitin using concentrated NaOH. This study would demonstrate the adsorption on artificial waste containing 100 mg/L of Pb using 1 gram of chitosan with variations in pH (4, 5, 6) and time (30, 60, 90 minutes) to determine the effectiveness of chitosan made of shrimp shells in reducing Pb concentration. The results show that the highest removal efficiency of lead was achieved at pH 4 and 90 minutes duration with a removal percentage of 99.88%. Conclusion, significance, and impact study: Chitosan compounds as the results of shrimp shells processing have amine groups (NH2) which are nucleophiles (rich in electrons). It is favorable to be used as biocoagulants or bioadsorbents of lead heavy metal with a removal efficiency of above 90%.
, Suprihanto Notodarmodjo, Qomarudin Helmy
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 66-87; https://doi.org/10.25105/urbanenvirotech.v2i1.3556

Abstract:
The continues deficiency of consumable water is a significant issue in developing countries, and contaminated water can result in various diseases, which are often lethal. Solar desalination seems to be a promising method and alternative way for supplying fresh water. Aim: The aim of this research is to study heat transfer in desalination system and the quality of feed water, distilled water and brine compared to the quality standard. Feed water consists of salinity 12‰ and 38‰ salinity. Methodology and Result: At first, initial characterization of feed water was conducted, then temperature on fourteen points was measured using thermocouples and thermometer so heat transfer rate can be calculated. After that, the final characterization of water production was conducted. From the observation, it was found that evaporative heat transfer for vacuum pressure of -0.05, -0.1, -0.15, -0.2, -0.25, and -0.3 bar respectively were 173.77, 180.07, 190.79, 481.66, 242.57, and 246.24 W/m2. The result of water quality test of distilled water produced from saline water desalination for some parameters respectively were pH 7.4; turbidity 2.73 NTU; TDS 27.45 mg/L; chloride 84.98 mg/L; Fe 2.13 mg/L; total hardness 0.1698 mg/L; and Escherichia coli 12 cell/mL . Conclusion, significance and impact study: It can be concluded that distilled water produced by desalination system was met drinking water quality standard according to Minister of Health Regulation No. 492 of 2010.
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 88-101; https://doi.org/10.25105/urbanenvirotech.v2i1.3557

Abstract:
Aim: This study aims to identify, develop, and determine the most suitable concept of solid waste management to be applied in Ifale Village, Yobeh Village, Putali Village, Atamali Village, and Asei Besar Village. Until now, the application of solid waste management system in Jayapura is still far from what people expected since it has been unable to serve the communities who live in rural areas on the islands around Sentani Lake. As a result, 12,554.38 liters/day of solid waste generated by the community in these regions is left untreated. Methodology and Results: The study is using the Analytic Hierarchy Process (AHP) method. The AHP calculations show that the idea of handling solid waste in an integrated treatment facility—following the initial sorting on the household scale—has the highest priority weight (2.05) compared to the other alternatives. Hence, it has been chosen as the best solid waste management concept that can be applied to the study sites. Based on the results as well, the main criteria to be considered include the environmental aspects, social aspects, and technical aspects with each weighing value of 0.534, 0.186, and 0.147, respectively. Conclution, significans and impact study: The sub-criteria with the highest priorities to be considered in making the decision are the soil pollution (due to produced leachate), air pollution (potentially in the form of stench and gas emissions), the transmission of disease vectors, public participation, and the operational convenience.
Elsa Try Julita Sembiring, Idris Maxdoni Kamil
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY, Volume 2, pp 1-13; https://doi.org/10.25105/urbanenvirotech.v2i1.3530

Abstract:
Aim: This study has been done to investigate the contamination in the main open channel using mathematical modeling to describe the pollutant transport of groundwater around the Cicabe final disposal site, Mandalajati Village, Bandung (coordinate 6°53'50"S; 107°39'48"E). Methodology and Result: This research was conducted in the irrigation channel that crossed next to Cicabe former waste disposal site. Pollutant parameter studied was Chromium (Cr) in water and sediment. To determine the pollutant transport along flow was using the equation of 1-dimensional analytical model based on advection–dispersion phenomena. The sampling was done twice for model calibration and validation. The samples collected included sediment and water. Pollutant input generated from leachate, domestic waste, and the open channel. The Cr simulation for k = 3 x 10-4/sec resulted that the model concentration was quite valid to approach observed Cr in observation and calibration. Simulations also done each segment to approach Cr observation with k1 = 2.5x10-4/sec, k2 = 1.1 x 10-3/sec, and k3 = 0/sec. Conclusion, significance and impact study: Cr concentration in the water met the quality standard according to PP 82/2011, while the Cr concentrations in sediment were above the US-EPA standard (2004). The simulation result for calibration and validation with k=1.4x10-4 Cr/sec showed the model was sufficient approaching the observed Cr. The Cr simulation indicated that the Cr had decayed as evidenced by the quite high Cr concentration in sediment.
Page of 3
Articles per Page
by
Show export options
  Select all
Back to Top Top