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发表日期:2017年09月21日 14:23:33       已经有位读者读过此文

垃圾龄对填埋场好氧修复供氧和加速稳定化效果的影响*


刘建国1,2 倪 哲1 李 睿1 蔡博峰3

(1. 清华大学环境学院,北京100084; 2. 固体废物处理与环境安全教育部重点实验室,北京100084;

3. 环境保护部环境规划院气候变化与环境政策研究中心,北京100012)


摘要:填埋场好氧处理是一种有效的填埋场修复手段。采用模拟填埋反应器,搭配水气联合控制系统,探讨不同填埋龄垃圾好氧稳定化过程最佳氧气控制范围和污染物去除情况。结果表明新鲜垃圾和填埋龄分别为1,3,7 年的垃圾最佳氧浓度调控范围分别为11% ~14%、8% ~14%、7% ~15%和6% ~17%。垃圾耗氧速率随填埋龄增加而降低。经过180 ~220 d 的好氧处理,新鲜垃圾渗滤液BOD5 和COD 去除率均达到92% 以上;而老龄垃圾渗滤液COD 降解慢。处理后期各反应器ρ(BOD5 ) / ρ(COD) <0. 1,垃圾基本稳定。

关键词:城市生活垃圾;好氧处理;氧气含量;污染物消减

DOI:10. 13205/ j. hjgc. 201602004

EVALUATION OF OXYGEN REQUIREMENT AND ACCELERATED PERFORMANCE OF

STABILIZATION BY LANDFILL AERATION: EFFECT OF REFUSE AGE


LIU Jian-guo1,2 , NI Zhe1 , LI Rui1 , CAI Bo-feng3

(1. School of Environment, Tsinghua University, Beijing 100084, China;

2. Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education, Beijing 100084, China;

3. Center for Climate Change and Environmental Policy, Chinese Academy for Environmental Planning, Beijing 100012, China)


Abstract: Landfill aeration was considered as a promising technology to remediate the old landfill sites. In this study,simulated landfill columns were constructed equipping with automatic control system for moisture and oxygen content, and the optimal oxygen range and accelerated performance of aerobic treatment for different age refuses were investigated. The results demonstrated that the oxygen range required was slightly different according to the refuse age: The optimal control ranges for fresh and aged refuse (1,3 and 7 years old) were 11% ~14%、8% ~14%、7% ~15% and 6% ~17%, respectively. The older the refuse was, the more slowly the oxygen was consumed. After 180 ~220 days of aerobic treatment, the total removal of BOD5 and COD in the leachate from fresh refuse were more than 92%; while, the decrease of leachate COD from aged refuses was relatively slow. After aeration, the characteristics of leachate from all the reactors were relatively stable with BOD5 / COD <0. 1, which were considered as a stabilization condition of refuses.

Keywords: municipal solid waste; landfill aeration; oxygen content; pollutants removal