半连续式厨余和牛粪混合厌氧消化  

Anaerobic co-digestion of kitchen waste with cattle manure in semi-continuous mode

作　　者：李荣平[1] 李秀金[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2007年第S2期8-11,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：北京市自然科学基金(8062023)

摘　　要：在中温35℃下,通过半连续运行方式,对牛粪、厨余的单独消化以及厨余和牛粪的混合消化进行了对比研究。试验结果表明,由于混合消化提供了较佳的水解酸化pH值范围,提高了缓冲能力,改善了碳氮比,因此其产气性能明显好于单独消化。其中,厨余和牛粪中的挥发性固体(VS)质量比为3∶1时混合消化效果最佳,甲烷产率为0.23 L/(gVS),分别是牛粪和厨余单独消化时的3.8和1.6倍,VS去除率高达71.9%。这说明,混合消化是提高厌氧消化性能的有效途径之一。A comparative study of the single-digestion of kitchen waste,cattle manure and co-digestion of the two wastes was conducted in semi-continuous mode at the mesophilic temperature of 35 ℃.The results showed that co-digestion was significantly superior to single-digestion,due to the optimal pH range for hydrolysis and acidification,stronger buffer capacity and well-balanced C/N ratio during the co-digestion process.When the ratio of kitchen waste to manure was 3∶1,a methane yield of 0.23 L CH4/(gVS) was achieved,which was 3.8 and 1.6 times that obtained with cattle manure and kitchen waste,respectively.The observed VS removal efficiency of 71.9% indicates that co-digestion is an effective way to enhance the digestion performance.

关 键 词：厨余 牛粪 生物气 混合厌氧消化 

分 类 号：X705[环境科学与工程—环境工程]