摘要
与单相沼气发酵相比,两相厌氧发酵具有有机负荷大、发酵稳定性高、水力停留时间短、产气效率高的特点,为了提高牛粪厌氧发酵效率,该文在中温(35±2)℃条件下对牛粪加水固液分离后分离液进行两相厌氧发酵试验研究,在发酵液体积为5L,总固体质量分数为6.60%,产酸相水力停留时间为3d,产甲烷相水力停留时间为7d,后发酵1d的条件下,化学需氧量去除率达到52.81%,底物(以挥发性固体计)的产气率达到181.45L/kg,研究结果为提高牛粪资源化利用效果提供了一定的参考价值。
Two-phase anaerobic fermentation has the advantages of high organic load and fermentative stability,low hydraulic retention time（HRT） and high biogas yield,compared with single-stage methane fermentation.In order to improve the rate of anaerobic fermentation of caw manure,two-phase fermentation was researched at（35±2）℃,which fermentative solution was from mixture of dairy manure and water by solid-liquid separation.Results showed that COD removal rate and biogas yield of substrates＇ volatility solid content reached about 52.81% and 181.45 L/kg under the conditions of 3 d HRT of acidogenic phase and 7 d HRT of methanogenic with 1 d fermentation,which fermentation material was 5 L and TS concentration was 6.60%.The results can provide references for reclamation of dairy manure.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2011年第7期300-305,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
863计划项目(2007AA100705)
国家科技支撑计划项目(2011BAD15B04)
黑龙江省科技攻关项目(GZ09B501)
关键词
粪
沼气
发酵
固液分离
manure
biogas
fermentation
solid-liquid separation
