不同恒温条件厌氧发酵的沼气成分研究  

Influence of Temperature on Biogas Componsition of Thermostatic Anaerobic Fermentation

作　　者：李金平[1] 柏建华[1] 李珍[1] 

机构地区：[1]兰州理工大学太阳能与气体水合物研究中心,甘肃兰州730050

出　　处：《中国沼气》2010年第6期20-23,55,共5页China Biogas

基　　金：国家863计划(2007AA05Z261);甘肃省重大专项(092NKDA035);甘肃省基金(0809RJZA022);甘肃省教育厅硕导基金(0803-06);兰州理工大学优秀青年教师计划(Q200801)

摘　　要：为了研究发酵温度对厌氧发酵产沼气的成分影响,在4个11.5 L的发酵罐中进行了恒温19℃,30℃,37℃和52℃的鲜牛粪厌氧发酵实验,并用沼气分析仪实时测量了沼气成分。实验结果表明,37℃恒温厌氧发酵的产气量和产甲烷量为最大,其发酵周期为22天,在发酵周期内干物质产气率为0.31 m3.kg-1,池容产气率为0.76 m3.m-3d-1,平均甲烷含量为53.59%;19℃厌氧发酵的产气量和产甲烷量都为最小。To study the influence of temperature on biogas composition of thermostatic anaerobic fermentation with cattle manure,four parallel anaerobic digesters of 11.5 L were operated in batch mode at temperature of 19℃,30℃,37℃ and 52℃,respectively,and the real-time analysis were carried out to determine the biogas composition with Biogas Check instrument.The results shows that the highest cumulative biogas and the highest methane production are under 37℃,and the lowest cumulative biogas and the lowest methane production are under 19℃. The fermentation period for 37℃is 22 day during which the volumetric biogas production rate was 0.76 m3·m-3d-1 with TS biogas production yield of 0.31 m3·kg-1,and average content of methane was 53.59%.

关 键 词：恒温厌氧发酵 沼气成分 干物质产气率 池容产气率 甲烷含量 

分 类 号：S216.4[农业科学—农业机械化工程]