猪粪麦秆不同比例混合厌氧发酵特性试验  

Characteristics of Co-digestion of Pig Dung and Wheat Straw in Various Ratios

作　　者：楚莉莉[1] 李轶冰[2] 冯永忠[2] 杨改河[2] 任广鑫[2] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]西北农林科技大学农学院,陕西杨凌712100

出　　处：《农业机械学报》2011年第4期100-104,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(30700482);"十一五"国家科技支撑计划资助项目(2007BAD89B16);陕西省13115重大科技计划资助项目(2009ZDKG-03;2010ZDKG-06)

摘　　要：以猪粪、麦秆为原料,研究了35℃下二者按不同比例混合对厌氧消化产沼气的影响,分析了消化过程中日产气量、累积产气量、甲烷含量、原料去除率、pH值以及氨态氮质量浓度的变化。结果表明,猪粪与麦秆配比（干物质量比）1∶1时产气量最大,为383.0 mL/g,是麦秆单独发酵产气量（231.8 mL/g）的1.6倍;混合原料（猪粪和麦秆配比分别为1∶1、2∶1、3∶1）的VS去除率均在37%以上,比麦秆提高12.0%-26.9%;添加猪粪可提高发酵液中氨态氮含量,较麦秆提高35.6%~64.8%。因此,合理调控粪秆混合厌氧发酵的比例,能提高秸秆的产气率和利用率。Pig dung and wheat straw（the ratio of pig dung to wheat straw was 1∶1,2∶1,3∶1）were used as fermentation materials.The experiments were carried out at 35℃.The biogas production rate,cumulative biogas yield,methane content,material reduction,pH value and NH3-N content were tested.The results showed that the co-digestion of pig dung to wheat straw could increase the biogas yield and material reduction of wheat straw.The biogas production yield of 1∶1 was highest（383.0 mL/g）,which was 1.6 times of biogas production yield of wheat straw（231.8 mL/g）.VS reductions of combination materials were 12.0%～26.9% higher than wheat straw.Compared with wheat straw,the NH3-N contents of combination materials increased by 35.6%～64.8%.Reasonable co-digestion ratio of livestock dung and crop straw could increase the biogas production rate and utilization of crop straw.

关 键 词：猪粪 麦秆 沼气 混合发酵 

分 类 号：S216.4[农业科学—农业机械化工程]