期刊
JOURNAL OF CLEANER PRODUCTION
卷 279, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2020.123678
关键词
Anaerobic co-digestion; Methane; Waste activated sludge; Fish waste; Microbial community
资金
- National Natural Science Foundation of China [41877344]
- State Key Laboratory of Freshwater Ecology and Biotechnology [2019FBZ03]
- NationalWater Science and Technology Project [2018ZX07208001]
- One-Hundred Scholar Award from Chinese Academy of Sciences [E029040201, E051040101]
- Study on cleaning mode of intensive aquaculture in freshwater pond project from Chinese Academy of Sciences [Y85Z021301, Y951040101]
The study on anaerobic co-digestion of waste activated sludge and fish waste showed that adding 1.5% and 3% of fish waste could enhance methane production, while adding more than 6% inhibited methane production severely. Microbial community analysis revealed dominance of hydrogenotrophic and methylotrophic methanogenesis pathways during anaerobic co-digestion.
The performances of anaerobic co-digestion (AcD) of waste activated sludge (WAS) and fish waste (FW) were studied through mesophilic biochemical methane potential test. Mixtures of various compositions (0, 1.5, 3, 6 and 10% of FW on the volume basis) were tested as the AcD substrates. Experimental results showed that 1.5% and 3% of FW addition could enhance the cumulative methane production remarkably, increasing from 212.3 mL CH4/g VSfed (100% WAS) to 410.1 mL CH4/g VSfed and 683.8 mL CH4/g VSfed, respectively. However, methane producing was inhibited severely with more than 6% of FW addition, whose cumulative methane production dramatically decreased to approximately 51 mL CH4/g VSfed. Mechanism analysis showed that large amounts of fatty acids accumulation occurred during the AcD with FW addition above 6%, leading to methanogenesis process failure. Microbial community analysis showed that methane producing during AcD was dominated by hydrogenotrophic and methylotrophic methanogenesis pathways led by Methanobacterium and Methanomassiliicoccus. (c) 2020 Elsevier Ltd. All rights reserved.
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