温度与pH对静态厌氧发酵产甲烷的影响

Effects of Temperature and p H Value on Methane Yield during Process of Static Anaerobic Fermentation

[目的]筛选静态厌氧发酵产甲烷的最佳试验条件。[方法]自行研制甲烷厌氧发酵装置生物反应器,以牛、兔和熊的粪便为发酵物料,对甲烷产生的最适温度、物料发酵初始p H以及物料的初始碳氮比对甲烷产生的影响进行研究。[结果]发酵温度为35℃,物料的初始p H为7时可获得最大的甲烷产量,牛粪的碳氮比最适合发酵产甲烷气。改变发酵温度和物料初始p H对总产气量有影响,但对发酵周期影响不大。[结论]该研究可为利用家畜粪便制造沼气提供理论依据和参考。

[Objective] The research aimed to screen the optimum experimental conditions of static anaerobic fermentation for the production of methane.[Method] The bioreactor of producing methane was developed.Then taken wastes of cow,rabbit and bear as fermentation material,the effects of temperature,initial pH and ratio of carbon and nitrogen on methane yield were studied.[Result] The results showed that the most yield of methane could be harvested under conditions with temperatureof 35 ℃ and the fermentation initial pH value of 7.The ratio of carbon source to nitrogen source was an important parameter affecting yield of methane.The cow dung was the best material for producing methane under static anaerobic fermentation.[Conclusion] This study could provide theoretical references for the methane production with animal wastes as meterials.