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Enhancement of Methane Production by Using Vermicompost as Additive

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2007 ASAE Annual Meeting  076005.(doi:10.13031/2013.23289)
Authors:   Bailiang Zhang, Shiguan Yang, ,
Keywords:   vermicompost; anaerobic fermentation; methane production; additive

The possibility of vermicompost enhancing methane production as additive was evaluated by anaerobic batch digestion experiments of synthetic wastewater. The effects of different vermicompost concentrations, on the base of TS, 10%, 5%, 1% of the wastewater mass respectively, on the methane production and digestion process were investigated at the constant amount of the wastewater and the inoculated sludge. Each experiment was successively conducted twice under mesophilic conditions. The results show that vermicompost could increase the methane production by 25.2% at most relative to the control by enhancing the specific methanogenic activity of anaerobic sludge, it also could increase the buffering ability of anaerobic liquor for pH in its initial adding period as well. It can be concluded that vermicomposts could be used as additives for anaerobic fermentation.

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