基于LandG EM模型北京垃圾填埋场填埋气产生量估算  

Estimation of Landfill Gas Generation Based on the LandGEM Model in Beijing Landfill Sites

作　　者：张洁[1] 王春梅[1] 

机构地区：[1]北京林业大学环境科学与工程学院,北京100083

出　　处：《环境科学与技术》2013年第9期144-148,204,共6页Environmental Science & Technology

基　　金：中央高校基本科研业务费专项资金(YX2011-14 of BJFU)

摘　　要：填埋是北京市垃圾处理的主要方式,占90%。填埋过程中产生的填埋气(LFG)是一种高热值清洁能源,对LFG有效利用的前提是准确的估算LFG产生量。文章采用LandGEM模型对北京市垃圾填埋场LFG产生量进行估算,2012年LFG产生量为19 653 m3/h,LFG产生量高峰在2016年达到24 003 m3/h。LFG产气量对模型参数最终CH4产生潜力(L0)的敏感性高于CH4产生率(k)的1.4倍:其对L0的敏感性指数恒等于1,对k的敏感性指数在0.547～0.802之间波动。基于北京市垃圾组分确定模型参数(L0=43.3 m3/t、k=0.051 a-1)为最佳值。北京市垃圾填埋场LFG收集效率为0～78%,平均值为35%。2009-2011年,模型估算北京市填埋场LFG收集量比实际收集量平均高9%,预测值和实际值吻合较好,表明该模型和参数的选择具有较高准确性,为LFG利用项目提供较为切合实际的设计依据。Landfilling is the common form of waste disposal in Beijing which handles 90% of it. Landfill gas（LFG） which is generated from landfill process is a clean energy with high calorific value, and accurately estimation of the generation of LFG is the premise of its effective utilization. The LandGEM model was applied in the study to estimate LFG generation in Beijing landfill sites. There was a LFG generation of 19 653 m3/h in 2012 and a maximum value of 24 003 m3/h in 2016. Sensitivity analysis of the effects of model parameters of the ultimate CH4 generation potential was 1.4 times larger than CI-L generation rate on LFG generation, with sensitivity index of ultimate CH4 generation potential on LFG generation was 1 and CH4 generation rate on LFG generation ranged from 0.547 to 0.802. Based on Beijing waste composition, ultimate CH4 generation potential of 43.3 m3/t and CH4 generation rate of 0.051 a-1 were the best fit parameters. At Beijing landfill sites, LFG collection efficiency varied from 0 to 78% with mean value of 35%. The modeled LFG collection was 9% higher than actual value from 2009 to 2011, and both are in good agreement which shows the model and parameters are chosen with high accuracy. The results provide a more realistic design basis for LFG utilization projects.

关 键 词：填埋气 LandGEM模型 敏感性分析 北京市 

分 类 号：X705[环境科学与工程—环境工程]