Details

Autor(en) / Beteiligte

• Xu, Xi-Jun
• Wang, Wan-Qiong
• Chen, Chuan
• Xie, Peng
• Liu, Wen-Zong
• Zhou, Xu
• Wang, Xue-Ting
• Yuan, Ye
• Wang, Ai-Jie
• Lee, Duu-Jong
• Yuan, Yi-Xing
• Ren, Nan-Qi

Titel

The effect of PBS on methane production in combined MEC-AD system fed with alkaline pretreated sewage sludge

Ist Teil von

• Renewable energy, 2020-06, Vol.152, p.229-236

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• 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-CH4/(mLreactor·d) (control) to 0.2 mL-CH4/(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. •The effect of PBS on methane production in MEC-AD was explored.•PBS addition enhanced methane production in MEC-AD.•PBS might facilitate the release of organics into mixed liquor.•The microbial community with PBS addition had higher diversity.•PBS addition enhanced the growth of aceticlastic methanogens (Methanosaeta).