铁碳填料和硫铁矿填料强化两段式人工湿地处理农村生活污水  

TREATMENT OF RURAL DOMESTIC SEWAGE BY TWO-STAGE CONSTRUCTED WETLAND WITH IRON-CARBON AND PYRITE SUBSTRATES

作　　者：翟宇昆 赵敏[2] 郑向勇[2] 马玉慧 王春荣[1] ZHAI Yu-kun;ZHAO Min;ZHENG Xiang-yong;MA Yu-hui;WANG Chun-rong(School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing 100083,China;College of Life and Environmental Science,Wenzhou University,Wenzhou 325035,China;School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]温州大学生命与环境科学学院,温州325035 [3]上海交通大学环境科学与工程学院,上海200240

出　　处：《环境工程》2019年第7期108-113,共6页Environmental Engineering

基　　金：浙江省科技重大项目(2015C03G2250001)

摘　　要：以强化用于农村污水处理的两段式人工湿地对氮、磷去除能力为目的,搭建了前段为砾石填料,后段分别投加部分铁碳填料和硫铁矿填料的两段式水平流人工湿地系统,以模拟农村生活污水为处理对象,在水力停留时间为3d,曝气量为0.2L/min的条件下,研究填料在去除污染物中的作用及其机理。结果表明:3种人工湿地中,对模拟农村生活污水处理效果最好的是铁碳人工湿地,中后段处理效果强于其他2种人工湿地,出水TN、TP、NH4^+N和COD平均质量浓度分别为2.75,2.65,1.90,20.33mg/L。硫铁矿人工湿地处理效果与砾石人工湿地差别不大,铁碳人工湿地在中性条件通过微电解除氮时,未产生中间产物NH4^+N与NO2^--N。Three two-stage constructed wetlands with gravel,iron-carbon and pyrite as substrate were established for synthetic rural domestic sewage treatment.The HRT was determined as 3 d,and the aeration rate was 0.2 L/min.The effect and mechanism of substrates in pollutant removal were analyzed.The results indicated that:the iron-carbon constructed wetland reached the highest removal efficiency among three constructed wetlands;better removal efficiency was observed in the middle and back end of iron-carbon constructed wetland of the concentration of total nitrogen,total phosphorus,ammonia nitrogen,COD for 2.75,2.65,1.90,20.33 mg/L,respectively;there were little differences between gravel constructed wetland and pyrite constructed wetland in removal efficiency;the iron-carbon constructed wetland did not produce ammonia nitrogen or nitrous nitrogen as intermediates,during micro-electro denitrification process.

关 键 词：农村生活污水 两段式人工湿地 铁碳填料 硫铁矿填料 

分 类 号：X799.3[环境科学与工程—环境工程]