A dual-permeability hydro-biodegradation model for leachate recirculation and settlement in bioreactor landfills

被引：11
作者：
Feng, Shi-Jin [1 ]
Bai, Zhen-Bai [1 ]
Chen, Hong-Xin [1 ]
Cao, Ben-Yi [1 ]
Lu, Shi-Feng [1 ]
Chen, Yun-Min [2 ]
机构：
[1] Tongji Univ, Dept Geotech Engn, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China
[2] Zhejiang Univ, Dept Civil Engn, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Zhejiang, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2018年 / 25卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Dual-permeability model; Bioreactor landfill; Recirculation; Biodegradation; Settlement; MUNICIPAL SOLID-WASTE; FLOW; BEHAVIOR; WATER; COMPRESSION; MOVEMENT; REFUSE; MEDIA; SOILS;
D O I：
10.1007/s11356-018-1690-2
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A dual-permeability hydro-biodegradation model is developed to describe the leachate flow in municipal solid waste (MSW) and predict the long-term settlement induced by biodegradation in bioreactor landfills. The model is verified against Hydrus-1D and a recirculation experiment conducted in a full-scale landfill. Preferential flow and mass transfer between fissure and matrix can be reasonably modeled by the proposed model. A higher recirculation flow rate can speed up the stabilization process of landfill. However, too much recirculation leachate is not economical and environmental friendly. A stabilization speed index and a leachate utilization index are adopted to evaluate the stabilization speed of bioreactor landfill and utilization rate of leachate, respectively, and the optimal recirculation flow rate is estimated. A flow rate of q = 5 x 10(-5)-5 x 10(-4) m/h (equivalent to recirculation intensity of Q = 15-150 L/ton(waste)/year) is recommended for recirculation, which has been verified by the field data in numerous bioreactor landfills.
引用
收藏
页码：14614 / 14625
页数：12
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