Feasibility and optimization of wastewater treatment by chemically enhanced primary treatment (CEPT): a case study of Huangshi
Open Access
- 1 October 2016
- journal article
- research article
- Published by Taylor & Francis Ltd in Chemical Speciation and Bioavailability
- Vol. 28 (1-4), 209-215
- https://doi.org/10.1080/09542299.2016.1247657
Abstract
Carbon and nutrients as well as suspended solids (SS) removal by chemically enhanced primary treatment (CEPT) were conducted in the Qingshan wastewater treatment plant in Huangshi, Hubei Province. Feasibility of this process for wastewater treatment were investigated in detail by comparing the removal performance of three inorganic chemical coagulants (polyaluminium chloride, polyaluminium ferric chloride [PAFC] and poly ferric sulfate) individual or couple with poly acrylamide, optimizing the conditions during CEPT by both single factor analysis and orthogonal test designs. The results of this study demonstrated that CEPT turned out to be an effective method for wastewater treatment, with PAFC as the optimal coagulant, which showed preeminent removal capacity for chemical oxygen demand, total phosphorus and SS. The optimal working condition could be at pH 7.0, settling time 15 min, and velocity gradient of 174.80 and 15.56 s−1 for mixing and reaction phase respectively. While the coagulant dosage depends on raw water attributes, which had a decisive effect on CEPT treatment performances. However, the three coagulants behaved poorly in nitrogen removal.Keywords
Funding Information
- National Natural Science Foundation of China (51378400)
This publication has 15 references indexed in Scilit:
- A dynamic physicochemical model for chemical phosphorus removalWater Research, 2015
- Flocculation and dewaterability of chemically enhanced primary treatment sludge by bioaugmentation with filamentous fungiBioresource Technology, 2014
- The pre-treatment of submerged ultrafiltration membrane by coagulation—Effect of polyacrylamide as a coagulant aidJournal of Membrane Science, 2013
- The impact of chlorine disinfection on biochemical oxygen demand levels in chemically enhanced primary treatment effluentWater Science & Technology, 2013
- Chemically enhanced primary treatment (CEPT) for removal of carbon and nutrients from municipal wastewater treatment plants: a case study of ShanghaiWater Science & Technology, 2009
- Characterization and treatability studies of tannery wastewater using chemically enhanced primary treatment (CEPT)—A case study of Saddiq Leather WorksJournal of Hazardous Materials, 2009
- Hydrolysis and coagulation behavior of polyferric sulfate and ferric sulfateWater Science & Technology, 2009
- Recycle of Alum recovered from water treatment sludge in chemically enhanced primary treatmentJournal of Hazardous Materials, 2009
- Aluminium speciation: implications of wastewater effluent dosing on river water qualityChemical Speciation and Bioavailability, 2005
- Improvement of coagulation–flocculation process using anionic polyacrylamide as coagulant aidChemosphere, 2005