Effect of Substrate-to-Inoculum Ratio and Temperatures During the Start-up of Anaerobic Digestion of Fish Waste
Open Access
- 5 April 2022
- journal article
- Published by Tecno Scientifica Publishing in Industrial and Domestic Waste Management
- Vol. 2 (1), 17-29
- https://doi.org/10.53623/idwm.v2i1.80
Abstract
The high protein and lipid content of fish waste makes mono-digestion a difficult bioprocess for an anaerobic digestion (AD) system. On the other hand, the massive increase in fish and seafood consumption worldwide has led to an inevitable fish waste mono-AD. Therefore, this study was conducted to investigate the effects of food-to-microorganisms (F/M) ratios and temperatures during the start-up period of fish waste mono-digestion. F/M ratios of 0.5, 1, 2, and 3 on a g-COD/g-VSS basis were operated at 35°C and 45°C, representing mesophilic and hyper-mesophilic conditions, respectively. The increase in F/M ratio improved the maximum methane (CH4) production rate at both temperatures. However, F/M ratio of 0.5 generated the highest CH4 yield in mesophilic and hyper-mesophilic conditions (0.23±0.00 L-CH4/g-CODinput). Further increase in F/M ratio decreased CH4 yield up to 21.74% and 39.13% when the reactors were operated at 35°C and 45°C, respectively. When reactors were supplied with FM ratios of 0.5, 1, and 2, hyper-mesophilic temperature improved methanogenesis by up to 2.61% and shortened the lag phase by 22.88%. Meanwhile, F/M ratio 3 at 45°C decreased cumulative CH4 production by up to 26.57% and prolonged the lag phase by 10.19%. The result of this study is beneficial to managing the input substrate of a batch-AD system that treats fish waste as a sole substrate.Keywords
This publication has 26 references indexed in Scilit:
- Effects of a gradually increased load of fish waste silage in co-digestion with cow manure on methane productionWaste Management, 2014
- Optimization of Anaerobic Co-digestion of Strawberry and Fish WasteApplied Biochemistry and Biotechnology, 2014
- Comparison of operating strategies for increased biogas production from thin stillageJournal of Biotechnology, 2014
- Dynamic effect of total solid content, low substrate/inoculum ratio and particle size on solid-state anaerobic digestionBioresource Technology, 2013
- Evaluation of the biomethane potential of solid fish wasteWaste Management, 2012
- Effect of digester F/M ratio on gas production and sludge minimization of ultrasonically treated sludgeWater Science & Technology, 2010
- Inhibition of anaerobic digestion process: A reviewBioresource Technology, 2008
- Influence of inoculum to substrate ratio on the biochemical methane potential of maize in batch testsProcess Biochemistry, 2006
- Anaerobic batch co-digestion of sisal pulp and fish wastesBioresource Technology, 2004
- Assessment of the anaerobic biodegradability of macropollutantsReviews in Environmental Science and Bio/Technology, 2004