牛粪产氢产甲烷联合发酵产能效率的实验研究  

Energy Efficiency of Hydrogen and Methane Coupled Production by Cow Dung Fermentation

作　　者：杨斌[1] 尹芳[1] 柳静[1] 赵兴玲[1] 刘士清[1] 许玲[1] 陈玉保[1] 张无敌[1] 

机构地区：[1]云南师范大学,昆明650092

出　　处：《中国沼气》2014年第1期53-56,共4页China Biogas

基　　金：云南省科技条件平台建设项目(2010DH012)

摘　　要：为了克服产氢发酵和产甲烷发酵都存在的能源转换效率低这一瓶颈,实验将产氢发酵和产甲烷发酵进行联合,以牛粪为原料,进行产氢产甲烷联合发酵产能效率的研究,以期提升整体厌氧生物处理的产能效率;在产氢发酵阶段,通过调节pH值至5.0,抑制产甲烷菌、中断产甲烷过程的手段来实现产氢发酵,使其在产生氢气的同时生成小分子有机酸及醇类等有机物,当产氢发酵结束后,将产氢余液提供给产氢产乙酸菌和产甲烷菌进行产甲烷发酵,使小分子有机酸及醇类等物质继续代谢生成甲烷;结果显示牛粪产氢产甲烷联合发酵的能源转换效率为28.15%,明显高于牛粪产氢发酵的(9.76%)以及牛粪单独产甲烷发酵的(25.8%);结果表明本实验所建立的产氢产甲烷联合发酵模式能显著提升传统厌氧生物处理的能源转换效率。Both hydrogen fermentation and methane fermentation have problems of low energy conversion efficiency.To solve the problem,an anaerobic fermentation of cow dung producing both hydrogen and methane was designed to study and improve the energy conversion efficiency of anaerobic digestion.The fermentation pH was adjusted to 5.0 in hydrogen producing phase,after hydrogen fermentation,the pH of fermentation liquor was adjusted to 6.5 ～ 7.5,and add new inoculum to start methane fermentation.The result showed that the energy conversion efficiency was 28.15％,which were 18.39％ higher than the sole hydrogen fermentation of cow dung and 2.35％ higherthan the sole methane fermentation.

关 键 词：产氢发酵 产甲烷发酵 产氢产甲烷联合发酵 能源转换效率 

分 类 号：S216.4[农业科学—农业机械化工程]