Effects of pH and Temperature on Biogas Production Using Three Kinds of Animal Dung

pH值和温度对3种动物粪便发酵生产沼气的影响（英文）

[Objective] This study was conducted to perform harmless resourceful treatment to animal dung. [Method] With fresh cow dung, rabbit dung and bear dung as fermentation materials, the effects of different temperatures and initial pH values of materials on the biogas production process and biogas yield were investi- gated. [Result] The fermentation of cow dung, rabbit dung and bear dung all pro- duced biogas, and the biogas yield was in positive correlation with carbon-nitrogen ratio. The methane-producing bacteria were very sensitive to the initial pH of fer- mentation material. The adjustment of the temperature and initial pH of fermentation materials had no greater effect on the gas production cycle, but could change the gas production process and total biogas yield. [Conclusion] This study will provide a data basis for the production of biogas from the fermentation of animal dung.

[目的]对动物粪便进行无害化资源化处理。[方法]利用新鲜的牛粪、兔粪和熊粪作为发酵物料,以自行设计的生物反应器研究不同温度和物料起始pH对沼气生产进程和产气量的影响。[结果]牛粪、兔粪和熊粪作为发酵物料均可产生沼气,沼气产量随碳氮比成正相关。发酵物料的初始pH对沼气产生菌的影响十分敏感。调整温度和发酵物料起始pH值对产气周期影响不明显,但可改变产气进程和总产气量。[结论]该研究为动物粪便发酵生产沼气提供了数据依据。