Journal
WASTE MANAGEMENT
Volume 81, Issue -, Pages 117-127Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2018.09.042
Keywords
Solid state anaerobic digestion; Inoculum; Substrate/inoculum ratio; Microbial community structure; On farm organic waste
Categories
Funding
- National Key R&D Program of China [2017YFD0800202]
- Ministry of Science and Technology of the People's Republic of China [2016YFD0800601]
- position of manure treatment and utilization created in the laboratory of production and environmental control on the industry system of wool sheep under the Ministry of Agriculture [CARS-39-19]
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Effects of methanogenic community of inoculum (liquid anaerobic digestion effluent (L-AD effluent), waste activated sludge (WAS), and anaerobic granular sludge (AGS)) and substrate/inoculum ratio (S/I) on reactor performance in solid state anaerobic digestion (SS-AD) were investigated. L-AD effluent, which can provide sufficient microbes and enough buffering capacity to the reactor at an S/I ratio of 6, was found to quickly initiate SS-AD processes. The highest methane production was obtained in reactor inoculated with WAS at an S/I ratio of 2. Higher volatile fatty acids and total ammonia nitrogen concentrations were found when AGS was used as inoculum, which led to a low methane production. Methanosaetaceae, Methanosaetaceae, and Methanosaetaceae together with Methanobacteriaceae were the dominant methanogens in reactors inoculated with L-AD effluent, WAS, and AGS, respectively. These findings suggest among the three inoculum, L-AD effluent is the most effective inoculum for SS-AD of on farm organic waste. (C) 2018 Elsevier Ltd. All rights reserved.
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