期刊
BIORESOURCE TECHNOLOGY
卷 268, 期 -, 页码 68-76出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.06.080
关键词
Anaerobic fermentation; Waste activated sludge (WAS); Iron activated persulfate treatment; Short-chain fatty acids (SCFAs)
资金
- Fundamental Research Funds for the Central Universities [2017B01514]
- Open Funds of Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education [2013/B1602020402]
- National Natural Science Foundation of China [51708171]
- National Science and Technology Major Project [2014ZX07305002]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF17019]
- China Postdoctoral Science Foundation [2018M630508]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China
This study reported a novel and efficient approach to improve the anaerobic fermentation performance of waste activated sludge (WAS) by the indigenous iron activated persulfate (PS/Fe) treatment. Firstly, the production of short-chain fatty acids (SCFAs), especially acetic acid, was remarkably enhanced within shorter fermentation time. Mechanism investigations demonstrated that the PS/Fe treatment could simultaneously accelerate and enhance the hydrolysis and acidification process while inhibit the methanogenesis during WAS fermentation. The activities of key enzymes and the abundances of anaerobic microorganisms responsible for SCFAs production were stimulated in the presence of PS/Fe which would promote the biological processes. Secondly, the PS/Fe treatment improved the quality of fermentation residue by reducing the toxic organic compounds in the residue and enhancing the dewaterability of fermented sludge, which was beneficial to the final disposal of WAS with added economical and environmental values.
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