柠檬酸对牛粪厌氧发酵产沼气的影响研究  

The influences of adding citric acid monohydrate on anaerobic fermentation of cattle manure for biogas production

作　　者：朱江[1] 云斯宁[1] 杜婷婷[1] 黄欣磊 

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055

出　　处：《可再生能源》2015年第12期1861-1865,共5页Renewable Energy Resources

基　　金：国家"十二五"科技支撑计划项目(2012BAD47B02)资助

摘　　要：文章研究了柠檬酸添加量对牛粪中温(35±1℃)厌氧发酵产沼气的日产气量、累积产气量、p H值以及COD降解率等的影响。结果表明:添加适量的柠檬酸对牛粪厌氧发酵产沼气具有显著的促进作用,0.6%的柠檬酸添加量取得了最高日产气量38.46 m L/g(VS);0.7%的柠檬酸添加量取得了最高累积产气量545.48 m L/g(VS);0.3%的柠檬酸添加量可以大幅提高COD去除率,达到了34.5%;随着柠檬酸添加量的增加,第二次产气高峰依次推迟,p H值从6.76逐渐降低到5.41,当柠檬酸添加量为0.9%时,p H值达到5.57。该研究结果为牛粪厌氧发酵规模化沼气工程的高效运行提供了技术参考。This paper investigated the influences of citric acid additive on daily production of biogas,cumulative yield of biogas, p H and COD degradation rate of cattle manure for anaerobic digestion under mesophilic condition. The results indicated that the addition of an appropriate dose of citric acid can promote the anaerobic fermentation of cattle manure for biogas production. The daily production of biogas reached the highest value of 38.46 m L/ g（VS） with the addition of 0.6% citric acid. The cumulative yield of biogas achieved the highest value of 545.48 m L/g（VS） as citric acid of 0.7% was added to the substrate. With addition of 0.3% citric acid, the removal rate of COD was improved significantly and reached 34.5%. With increasing of citric acid content, the second peak of daily yield of biogas was delayed, p H value begin to decline from 6.76 to 5.41. As citric acid content was added to0.9%, p H value reached 5.57. This work will provide a technological reference for the efficiently anaerobic fermentation of cattle manure for large-scale biogas production.

关 键 词：牛粪 厌氧发酵 柠檬酸 沼气生产 生物质 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.4[农业科学—农业机械化工程]