Abstract:

Due to the rapid increase of landfill volume and the aging and damage of the leachate treatment facilities at a landfill in Handan, the original leachate treatment station at the landfill could not meet the existing leachate treatment needs. The combined process of “pretreatment+external MBR+nanofiltration(NF)+reverse osmosis(RO)” was adopted to expand and reconstruct the original leachate treatment station,and a new nanofiltration concentration reduction system was built. The “material membrane reduction+humic acid extraction” process was adopted to achieve concentration reduction treatment. The problems of tight schedules, compact sites, and shortage of funds were effectively solved through rational layout, reconstruction of old buildings, and construction of new steel tanks. After the expansion and reconstruction, the treatment capacity of the leachate treatment station was 500 m³/d with the yield of effluent clear liquid as 95%. The effluent water quality stably met the emission standard of Table 2 in the “Standard for Pollution Control on the Landfill Site of Municipal Solid Waste”(GB 16889‒2008). The total investment for the project was 22.18 million yuan, and the actual operating cost of the renovated leachate treatment station was 41.82 yuan/m³.

Key words: landfill site, leachate treatment station, expansion and reconstruction, external membrane bioreactor, nanofiltration, reverse osmosis

摘要：

由于邯郸某生活垃圾填埋场的垃圾填埋量激增和渗滤液处理设施老化损坏，填埋场原有渗滤液处理站已无法满足现有渗滤液处理需求。采用“预处理+外置式膜生物反应器（MBR）+纳滤（NF）+反渗透（RO）”的组合工艺对原有渗滤液处理站进行扩容改造，并新建纳滤浓缩液减量化系统，采用“物料膜减量+腐殖酸提取”工艺实现纳滤浓缩液减量处理。通过合理布置、利旧改造和新建钢罐等措施有效解决了工期紧张、场地紧凑和资金短缺等问题。扩容改造后渗滤液处理站处理规模提升至500 m³/d，出水清液产率达到95%，出水水质稳定达到《生活垃圾填埋场污染控制标准》（GB 16889—2008）中表2排放标准。工程总投资为2 218万元，改造后渗滤液处理站实际运行成本为41.82元/m³。

关键词: 垃圾填埋场, 渗滤液处理站, 扩容改造, 外置式膜生物反应器, 纳滤, 反渗透

CLC Number: 

• X703