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• W1981959372 abstract "This paper examines the optimization of an existing two-phase anaerobic digestion process using grass silage as a feedstock. The system comprises 6 leach beds connected to an upflow anaerobic sludge blanket (UASB). The existing system produced 305 L CH4 kg–1 VS added at an overall retention time of 42 days (6 leach beds emptied and fed sequentially every 7 days in series). The desired improvements were a reduction in retention time with increased methane production. It was noted in the existing system that biogas production and COD levels fell off in the last 2 days of each 7-day cycle. Thus the first change involved reduction in retention time to 30 days (6 leach beds fed sequentially every 5 days in series). This lead to a slight improvement in methane production (310 L CH4 kg–1 VS added). The second change was effected by separation of flows to the first stage (leach beds) and the second stage (UASB) through addition of an extra pump to optimize leaching. This led to an increase in CH4 production (341 L CH4 kg–1 VS). The overall improvement from the existing system was an increase of 11.8% in methane production and a reduction in size or retention time of 40% (42 days decreased to 30 days retention time)." @default.
• W1981959372 created "2016-06-24" @default.
• W1981959372 creator A5005929259 @default.
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• W1981959372 date "2011-08-03" @default.
• W1981959372 modified "2023-10-16" @default.
• W1981959372 title "Optimizing the Operation of a Two-Phase Anaerobic Digestion System Digesting Grass Silage" @default.
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• W1981959372 doi "https://doi.org/10.1021/es201357r" @default.
• W1981959372 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21786758" @default.
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