Journal
BIORESOURCE TECHNOLOGY
Volume 216, Issue -, Pages 323-330Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.05.100
Keywords
Waste activated sludge; Perennial ryegrass; Anaerobic co-digestion; Methane production; Methane content
Funding
- National Science Foundation of China [51408419]
- State Key Program of National Natural Science of China [51538008]
- 12th National Five-Year-Plan of Key Science and Technology [2014BAC31801]
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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 310 mL/gVS(add) 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. (C) 2016 Elsevier Ltd. All rights reserved.
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