Research of Characters on Biogas Production of the Yam Residue Anaerobic Digestion in Different Bacteria

This study explored the characteristics of bacteria producing biogas by anaerobic digestion in yam waste. Bacteria source,respectively from activated sludge of yeast waste water and straw decomposition methanogenic bacteria by laboratory acclimating,were fermentated continuously for 58 days to study the biogas production. While,the influence of adding cellulose-decomposing WDC2 bacteria were investigated. The indicators of methane production efficiency and cellulase activity were monitored to evaluate the ability of anaerobic fermentation producing methane in sapogenin waste. The results showed that methanogenic bacteria could produce large amounts of methane in turmeric waste and the highest daily gas production was up to 2 701 m L,the maximum gas production efficiency was 855 m L/g. Meanwhile,the gas production efficiency of bacteria from yeast wastewater sludge was much better than straw decomposition methanogenic bacteria.Adding WDC2 bacteria could significantly improve the cellulase activity of anaerobic digestion process early. The cellulase activity and xylanase activity were the highest 1.22 U/m L and 9.42 U/m L. But adding WDC2 bacteria had no effect on the efficiency of the production of methane fermentation system.