Characterization of biogas production and microbial community in thermophilic anaerobic co-digestion of sewage sludge and paper waste

被引：29
作者：
Zhu, Aijun [1 ]
Qin, Yu [1 ]
Wu, Jing [1 ]
Ye, Min [1 ]
Li, Yu-You [1 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Dept Civil & Environm Engn, Lab Environm Protect Engn,Aoba Ward, 6-6-06 Aza Aoba, Sendai, Miyagi 9808579, Japan
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 337卷
关键词：
Sewage sludge; Paper waste; Anaerobic co-digestion; Biogas; Microbial community; LIFE-CYCLE ASSESSMENT; VOLATILE FATTY-ACIDS; FOOD WASTE; GEN; NOV; DEGRADATION; PROTEIN; BIODEGRADABILITY; CARBOHYDRATE; HYDROLYSIS; WATER;
D O I：
10.1016/j.biortech.2021.125371
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
To recover the biogas from sewage sludge and paper waste (PW), the methanogenic performance of thermophilic anaerobic co-digestion of sewage sludge with PW was assessed by a continuous experiment. The effects on the biogas production and microbial community were investigated by changing the PW ratio from 0 to 66.7%. The optimal performance was obtained at the ratio of sewage sludge: PW = 4:6 (total solids), where the COD removal efficiency and biogas production increased from 58.34 +/- 5.90% to 72.92 +/- 0.08% and 438 +/- 53 to 594 +/- 72 mL/gVSadded, respectively. By investigating the trend of carbohydrate and protein degradation rates, the competition between carbohydrate and protein degradation was quantified. The critical PW addition ratio was about (63.64%), where the protein degradation rate decreased to zero with increasing PW addition. Meanwhile, the microbial analysis showed that cellulolytic bacteria outcompeted proteolytic bacteria and to be the predominant group after PW addition.
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页数：10
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