常温条件下猪粪干发酵的启动  

Start-up of Dry Anaerobic Digestion of Swine Manure under Ambient Temperature

作　　者：刘刚金[1] 邓良伟[1] 陈子爱[1] 刘刈[1] 刘越[1] 顾新娇[1] 

机构地区：[1]农业部沼气科学研究所,成都610041

出　　处：《中国沼气》2013年第3期18-22,共5页China Biogas

基　　金：现代农业产业技术体系建设专项资金(CARS-36)

摘　　要：在室温(25℃),接种污泥和猪粪干物质比为1:1的条件下,对高固体浓度猪粪厌氧干发酵过程的启动进行了研究。从第10天开始,挥发酸,氨氮和游离氨达到相对稳定的水平,分别为7.5,4.1,0.28 g·kg-1。整个实验期间反应器内pH为8.05～8.23。产气速率从第7天开始达到相对稳定水平(58.1 L·d-1),此时的池容产气率为0.83 m3·m-3d-1,但是温度降低4℃导致产气速率降低35.5%左右。产气成分中CO2和CH4的含量在36小时内出现一个快速增长的趋势,其中CO2在第36小时左右达到峰值56.3%,此时CH4的含量为40.5%。CH4含量第20天左右达到60%,CO2含量低于40%。试验表明,在25℃左右,接种污泥和猪粪干物质比为1:1的条件下,20天左右能够启动猪粪厌氧干发酵反应器。Under ambient temperature condition, the start-up of dry anaerobic digestion of swine manure was studied. The dry mass ratio of swine manure and seeding sludge was 1： 1. The pH value in reactor ranged between 8.05 and 8.23. Vola- tile acid, ammonia nitrogen and free ammonia reached a relatively stable level of 7.5, 4.1 and 0.28 g kg-1 respectively in 10 days. And the gas production rate of the device obtained a relatively stable level of 58.1 L d-1 since the 7th days with the volumetric gas production rate of 0.83 m3 m -3d-1. However, the biogas production rate decreased 35.5% with the temperature decrease of 4℃. The CH4and CO2 content in biogas rose quickly during period of initial 36 hours. The CO2 dontent increased to its peak level of 56.3% at the 36th operation hour, while the CH4content was 40.5%. The CH4 con- tent reached 60% on the 20th operation day , and CO2 content was below 40%. The result showed that successful start-up for dry anaerobic digestion of swine manure could be achieved in around 20 days with swine manure and seeding sludge dry mass ratio of 1：1 under ambient temperature of about 25℃.

关 键 词：猪粪 干发酵 常温 启动 

分 类 号：X713[环境科学与工程—环境工程] S216.4[农业科学—农业机械化工程]