摘要
人工湿地是近年来日益受到关注的一项农业径流面源污染控制技术。结合重庆市南湖水源地保护工程的人工湿地工程实例,分析了该农业区雨季径流的水质、水量特征,并对人工湿地的运行特点以及不同运行方式下的除污效果进行了研究。结果表明,用于农业径流处理的人工湿地为典型非稳态运行人工湿地,在降雨影响下进水量和出水量并不相等,适合用径流平均浓度(EMC)去除率评估其污染物净化效能;在雨季进水水量和水质随机波动的情况下,人工湿地的出水COD、NH4^+-N、TN以及浊度值稳定,均能达到设计要求,但对TP的去除效果受进水量的影响明显,进水TP为0. 11~0. 34 mg/L时,出水TP的EMC值为0. 16 mg/L,未达到设计要求。
Constructed wetland is a technology for agricultural runoff non-point source pollution control,which has been popular in recent years. Based on the constructed wetland in the water source protection project of Nanhu Lake in Chongqing City,water quality and quantity characteristics of runoff in wet season in the agricultural area were monitored and analyzed,and the operational characteristics of constructed wetland and the removal of pollutants in different operation modes were studied as well. The results showed typical unsteady operation of the constructed wetland in which the effluent was different from the influent due to rainfall,and the event average concentration (EMC) removal rate was suitable to evaluate the pollutant removal efficiency. Under the fluctuation of quality and quantity of the influent in wet season,the effluent COD,NH4^+-N,TN and turbidity were stable,which also met the design requirements. However,the removal efficiency of TP was substantially affected by the influent quantity,when influent TP was 0. 11-0. 34 mg/L,the EMC value of effluent TP was 0. 16 mg/L,which failed the design requirements.
作者
肖海文
高梨娜
谭军莲
翟俊
代蕾
麦天鹏
XIAO Hai-wen;GAO Li-na;TAN Jun-lian;ZHAI Jun;DAI Lei;MAI Tian-peng(Key Laboratory of the Three Gorges Reservoir Region's Eco - Environment < Ministry of Education > ,Chongqing University,Chongqing 400045 ,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第15期77-81,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2009ZX07315-006)
关键词
人工湿地
农业径流面源污染
水源地保护工程
冲击负荷
constructed wetland
agricultural runoff non-point source pollution
water source protection project
shock loads
