Improvement and optimization for the first order decay model parameters at typical municipal solid waste landfills in China  

作　　者：Xiao-Xia NIU Shu-Zhuan WANG Yu-Chao NIU Li-Fang WEI Lu-Yao YU 

机构地区：[1]Department of Environmental Engineering,School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China [2]Zhengzhou City Administration Bureau,Zhengzhou 450006,China

出　　处：《Advances in Climate Change Research》2023年第4期605-614,共10页气候变化研究进展（英文版）

基　　金：supported by the cooperation project of Henan Collaborative Innovation Center for Environmental Pollution Control and Ecological Restoration and Zhengzhou Municipal Solid Waste Comprehensive Treatment Center,Zhengzhou City Administration Bureau.

摘　　要：Landfill gas(LFG)generation is commonly modeled by using a first-order model.Methane generation potential(L0)and methane generation rate constant(k)are two key parameters in the first-order model.Coal-ash based default values or roughly analyzed values often used in China may not be appropriate for accurately estimating of LFG generation.In this study,seven groups of parameters were evaluated by comparing the theoretical predictions with real measurements from five Chinese landfills.The optimal approach for calculating L0 is the use of site-specific waste composition and the default values of degradable organic carbon(DOC)reported by the Chinese industry standard(CJJ133-2009),and the matching k can be adjusted by fitting and regression.The optimized average values were L0=67 m3 Mg−1,k=0.06 per year for landfills in Beijing and Zhengzhou in cold–dry regions,L0=69 m3 Mg−1,k=0.16 per year for landfill in Shanghai in cold–wet region,and L0=64 m3 Mg−1,k=0.21 per year for landfills in Guangzhou and Shenzhen in hot–wet regions.Monte Carlo analysis showed that the uncertainty of LFG generation at closure year varied in−22.5%to 20.5%,−17.1%to 17.1%and−28.2%to 34.7%for three climatic regions,respectively.The k value is the key influencing factor,with a 95.6%contribution ratio in the hot–wet region landfill.The results provide references for future better waste management.

关 键 词：Municipal solid waste WASTE-TO-ENERGY Waste management Gas generation model 

分 类 号：X70[环境科学与工程—环境工程]