生物反应器填埋场系统中有机垃圾降解特性研究  

Characteristics of organic refuse decomposition in the bioreactor landfill system

作　　者：何若[1] 沈东升[1] 许恒韬[1] 朱荫湄[1] 

机构地区：[1]浙江大学环境工程系,杭州310029

出　　处：《农业工程学报》2006年第1期134-137,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(50478083);浙江省自然科学基金资助项目(599127)

摘　　要：针对渗滤液回灌型生物反应器填埋场中存在着有机酸积累的问题,试验将产甲烷反应器作为渗滤液回灌前的预处理设施引入生物反应器填埋场,研究了其系统中有机垃圾的降解和产气规律。结果表明,在本模拟试验条件下,有机垃圾在填埋场、产甲烷反应器和生物反应器填埋场系统的总产气量分别为62.1、456和518.1 L,其中产甲烷反应器产气量占生物反应器填埋场系统产气量的88%以上。在产甲烷反应器中产气速率与有机物去除率成正比,回归系数为0.4614 L/gCOD。基于生物反应器填埋场系统中有机物降解的特征,建立了其产气动力学模型。该模型可用来初步估算相关生物反应器填埋场系统中填埋垃圾稳定化所需时间及产气量,为系统填埋气的能源化利用提供理论依据。Based on the problem of organic acid accumulation in bioreactor landfills with leachate recycle, a methanogenic reactor used as the pretreatment establishment before leachate recycle was introduced into the bioreactor landfill in the study. The principle of the.organic refuse decomposition and gas production in the bioreactor landfill system was investigated. The ,results showed that the total gas production volumes for the landfill reactor, the methanogenic reactor and the bioreactor landfill system were 62.1 L, 456 L and 518.1 L, respectively, under the experimental condition. The gas generated chiefly from the methanogenic reactor where the gas production volume accounted for over 88% of the bioreactor landfill system. The gas production rate was directly proportional to organic removal rate in the methanogenic reactor, and the regression coefficient was 0. 4614 L CH4 per gram COD degraded. The kinetic model of gas production was developed based on the characteristics of organic mass decomposition in the bioreactor landfill system. The model can be used to presumedly calculate the time for the stabilization of landfilled refuse and the gas production volume in the relative bioreactor landfill system. And it also provided the theoretical basis for the utilization of landfill gas energy sources.

关 键 词：生活垃圾 生物反应器填埋场 降解 动力学模型 

分 类 号：X705[环境科学与工程—环境工程] R124.3[医药卫生—环境卫生学]