Simultaneous enhancement of methane production and methane content in biogas from waste activated sludge and perennial ryegrass anaerobic co-digestion: The effects of pH and C/N ratio.
It is necessary to find an appropriate strategy to simultaneously enhance the methane production and methane content in biogas from waste activated sludge (WAS) and grass co-digestion. In this study an efficient strategy, i.e., adjusting the initial pH 12 and C/N ratio 17/1, for simultaneous enhancement of methane production and methane content in biogas from WAS and perennial ryegrass co-digestion was reported. Experimental results indicated that the maximal methane production was 310mL/gVSadd at the optimum conditions after 30-d anaerobic digestion, which was, respectively, about 1.5- and 3.8-fold of the sole WAS and sole perennial ryegrass anaerobic digestion. Meanwhile, the methane content in biogas was about 74%, which was much higher than that of sole WAS (64%) or sole perennial ryegrass (54%) anaerobic digestion.
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Xiaohu
X
Dai
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Xiaoshuai
X
Li
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China. Electronic address: zhangdong_2011@aliyun.com.
Dong
D
Zhang
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Yinguang
Y
Chen
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Lingling
L
Dai
D000693:Anaerobiosis; D056804:Biofuels / Q000032:analysis; D019149:Bioreactors; D002244:Carbon / Q000032:analysis / Q000378:metabolism; D004798:Enzymes / Q000235:genetics; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D017404:In Situ Hybridization, Fluorescence; D008129:Lolium / Q000378:metabolism*; D008697:Methane / Q000096:biosynthesis*; D059013:Microbial Consortia / Q000235:genetics; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods; D018505:Waste Management / Q000379:methods*
D056804:Biofuels; D004798:Enzymes; D012722:Sewage; D002244:Carbon; D009584:Nitrogen; D008697:Methane
Anaerobic co-digestion; Methane content; Methane production; Perennial ryegrass; Waste activated sludge