温度对牛粪两相厌氧发酵特性的影响  

Effect of different temperatures on two-phase anaerobic fermentation of cattle manure

作　　者：李晶宇[1] 罗立娜[1] 李文哲[1] 公维佳[1] 郭勇 

机构地区：[1]东北农业大学工程学院,哈尔滨150030 [2]大庆第一采油厂,大庆163111

出　　处：《环境工程学报》2015年第8期4027-4031,共5页Chinese Journal of Environmental Engineering

基　　金："十二五"农村领域国家科技计划项目(2014BAD02B04);哈尔滨市应用技术研究与开发项目(2013RFQXJ094);东北农业大学博士启动基金项目(2012RCB72)

摘　　要：研究了不同温度对两相厌氧发酵特性的影响,温度设置分别为30、35、40、45、50、55和60℃,产酸相和产甲烷相的温度保持一致。结果表明,不同温度对挥发酸含量的变化趋势相同,都是随着发酵时间的增加先升高到最高点后开始下降,温度的改变不会影响牛粪的产酸代谢类型;温度的升高有利于水解过程的进行,但不利酸化过程的进行。产甲烷相的最佳水力停留时间为6 d,温度为35℃时产气量最高为6.08 L/d,中温更有利于牛粪湿法厌氧发酵过程的进行。The influences of different temperatures on the characteristics of two-phase anaerobic fermenta- tion were studied. The temperatures in acidogenic phase were consistent with methane-producing phase, which were set at 30℃ ,35℃ ,40℃ ,45℃ ,50℃ ,55℃ ,60℃ ,respectively. The results showed that the tendency of vol- atile acids at the different temperatures were in the same direction, increasing to the highest point then declining with increasing fermentation time. The acid-produced type of cow dung was not affected by the change in temper- atures. Elevated temperature was conducive to the hydrolysis process but was detrimental to acidification process. The optimal hydraulic retention time of the methane-producing phase was six days, and the most prolific gas pro- duction was 6.08 L/d which was obtained at 35℃ . The mesophilic temperature was conducive to the wet anaero- bic fermentation process of cow manure.

关 键 词：温度 两相 厌氧发酵 

分 类 号：X703[环境科学与工程—环境工程]