摘要
Abstract
The design treatment capability of Jinhua landfill leachate treatment center is 250 m3/d.This project adopts combined processes of pretreatment,two-stage anoxic oxic(AO),ultrafiltration(UF),nanofiltration(NF),and reverse osmosis(RO).The effluent quality enforces the limits for water pollution discharge concentrations in table 2 of Standard for Pollution Control on the Landfill Site of Municipal Solid Waste(GB 16889-2008).Jinhua landfill leachate treatment center has been stably running since it started oper-ation in December 2017.According to the 2021 documented water quality indices from different treatment systems,the average removal rate of chemical oxygen demand(CODCr)is greater than 90％and the average removal rate of ammonia nitrogen is greater than 99％in the two-stage AO system,the total nitrogen(TN)removal rate is 34.7％to 47.1％in the NF system,and the TN removal rate was 55.3％to 65.9％in the RO system.All the effluent water quality indices meet the design standards,and prove the stability and reliability of the design processes.This paper briefly introduces the Jinhua landfill leachate treatment center from the aspects of treatment processes,components and design parameters of each processing system and structure,control of operational parameters in design and operational phases.The paper further analyzes and summaries the characteristics of engineering design of the leachate treatment center.关键词
填埋场渗滤液/低碳氮比/两级AO/膜生物反应器(MBR)/纳滤(NF)/减量膜/反渗透Key words
landfill leachate/low C/N/two-stage anoxic oxic(AO)/membrane bio-reactor(MBR)/nanofiltration(NF)/reduction membrane/reverse osmosis(RO)分类
环境科学
