添加酒糟、草木灰对猪粪厌氧发酵的影响  

The influences of adding lees and plant ash on anaerobic fermentation of pig manure

作　　者：刘娟娟[1,2] 季艳敏[3,2] 尹冬雪[3,2] 李轶冰[1,2] 任广鑫[1,2] 

机构地区：[1]西北农林科技大学农学院,陕西杨凌712100 [2]陕西省循环农业工程技术研究中心,陕西杨凌712100 [3]西北农林科技大学林学院,陕西杨凌712100

出　　处：《可再生能源》2012年第3期77-82,共6页Renewable Energy Resources

基　　金："十二五"国家科技支撑计划项目(2011BAD15B03);陕西省13115重大专项(2010ZDKG-06);农业部农村能源综合建设项目专项(2011-65);陕西省自然基金(2009JM3004);西北农林科技大学基本科研业务费青年基金(QN2009006)

摘　　要：以猪粪为发酵原料,研究在25℃条件下分别添加不同量的酒糟、草木灰对厌氧发酵产沼气的影响,分析了厌氧发酵过程中产气速率、累积产气量、pH值、氨态氮质量浓度及甲烷含量的变化。结果表明,在猪粪中添加草木灰1 g,累积产气量大且甲烷含量高;添加酒糟5 g,累积产气量大且甲烷含量高。添加1,3,5 g草木灰,pH值呈现降低—升高—稳定的趋势,氨态氮呈现升高—降低—稳定的趋势;添加1,3,5 g酒糟后,发酵过程中的pH值和氨态氮变化规律相似,均呈现升高—降低—升高—稳定的趋势。因此,合理的酒糟、草木灰添加量是提高猪粪厌氧发酵产气量及甲烷含量的前提。Take the pig manure as fermentation materials, the effect of, by adding varying amounts of lees and plant ash on the anaerobic fermentation biogas production at 25 ℃, the aerogenesis rate ,accumulated gas production, pH, NH3-N content and CH4 content in the anaerobic fermentation process was analyzed. The results show that the accumulated gas production get the highest as well as the CH4 content when adding lg plant ash ;the same as adding 5 g lees into the pig manure. Adding 1,3 g and 5 g lees in the anaerobic fermentation process respectively, the tendency of pH present drop-increase-drop,and NH3-N increase-drop-increase. But Adding 1, 3 g and 5 g plant ash respectively in the anaerobic fermentation process, the tendency of pH and the NH3-N are similar, increases at first then reduces and finally becomes stable. In a conclusion, reasonable lees and plant ash addition is the premise to improve the amount of gas production and CH4 content in the pig manure anaerobic fermentation process.

关 键 词：猪粪 酒糟 草木灰 厌氧发酵 沼气 

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]