期刊
RENEWABLE ENERGY
卷 152, 期 -, 页码 229-236出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2020.01.052
关键词
Anaerobic digestion; Microbial electrolysis cell; Alkaline pretreated sludge; Phosphate buffer solution; Methane production
资金
- National Natural Science Foundation of China [51576057, 51676057]
- National Key Research and Development Program [2016YFC0401102-2]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2015DX04]
- China Postdoctoral Science Foundation [AUGA4130903217, AUGA4131003418]
- Heilongjiang Province Postdoctoral Science Foundation [AUGA4110002617]
Batch experiments were conducted to study bioelectrochemical enhancement of the anaerobic digestion (AD) of alkaline-pretreated sewage sludge in microbial electrolysis cell (MEC) in the presence or absence of phosphate buffer solution (PBS). Experimental results showed that the maximum methane production rate was increased from 0.18 mL-CH/(mLreactord) (control) to 0.2 mL-CH/(mLreactor.d) in the presence of PBS and cumulative methane production was 1.4-fold higher than that of control. The initial concentrations of SCOD, protein, polysaccharide and VFAs in the presence of PBS were slightly higher than those of control, suggesting that PBS might facilitate the release of organics into mixed liquor. The microbial community analysis results showed that the microbial community with PBS had higher diversity and Bacteroidetes and Firmicutes were the two most abundant phyla in the communities. Moreover, the PBS addition could enhance the growth of aceticlastic methanogens (Methanosaeta) and inhibit a portion of hydrogenotrophic methanogens (Methanobacterium), possibly due to the different cell wall composition. (C) 2020 Elsevier Ltd. All rights reserved.
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