复合人工湿地对快速城镇化流域的净化评估  

Evaluation on Purification of Rapidly Urbanizing Watershed by Composite Constructed Wetland

作　　者：张宇菁 杨志伟 李浈 黄金良 ZHANG Yujing;YANG Zhiwei;LI Zhen;HUANG Jinliang(College of the Environment and Ecology,Xiamen University,Xiamen 361102,Fujian,China)

机构地区：[1]厦门大学环境与生态学院,福建厦门361102

出　　处：《亚热带资源与环境学报》2023年第1期1-8,共8页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金项目(41971231)。

摘　　要：为研究快速城镇化进程下的流域水环境治理,构建了氧化塘和表流人工湿地组合系统,分析系统在不同水期的净化效果并运用内梅罗指数法进行评估,为水资源的综合管理提供参考。结果表明:复合湿地系统对各类污染物的整体去除效果较好,对TP、TDP、SRP和TPP的平均去除率分别为50.6%、63.1%、78.4%、48.9%,对TN、NH_(4)^(+)-N、NO_(2)^(-)-N和NO_(3)^(-)-N的平均去除率分别为49.7%、56.4%、20.1%、10.0%。氧化塘对TP、TDP、SRP、TN和NH_(4)^(+)-N的去除效果显著,表流湿地对TPP和NO_(3)^(-)-N的影响显著。系统各处的NO_(2)^(-)-N与NO_(3)^(-)-N浓度波动较小,部分时期NO_(3)^(-)-N浓度不减反增。TP、TN、NH_(4)^(+)-N与NO_(3)^(-)-N去除效果均表现为丰水期>平水期>枯水期,削减过程主要发生在生物氧化塘,而表流湿地则基本维持当前水质。内梅罗指数分析发现,湿地进口水质有75.0%为重度污染,25.0%为中度污染,出口水质有58.3%提升为轻度污染,其余41.7%为中度污染。研究表明,复合人工湿地系统在处理工业废水、畜牧养殖污水和生活污水混合作用的污染水体中,具有重要的现实意义。A combined system of oxidized pond and surface flow constructed wetland was constructed,in order to explore the river basin water environment management during the rapid urbanization process.The purification effect of the system during different water periods was analyzed and evaluated by Nemerow index method to provide reference for the comprehensive management of water resources.The results show that the system has a good overall removal effect on all kinds of pollutants.The average removal rates of TP,TDP,SRP and TPP were 50.6%,63.1%,78.4%and 48.9%.The average removal rates of TN,NH_(4)^(+)-N,NO_(2)^(-)-N and NO_(3)^(-)-N were 49.7%,56.4%,20.1%and 10.0%.The oxidation pond has a significant removal effect on TP,TDP,SRP,TN and NH_(4)^(+)-N and the surface flow wetland has a significant effect on TPP and NO_(3)^(-)-N.The concentration of NO_(2)^(-)-N and NO_(3)^(-)-N in all parts of the system fluctuated slightly and NO_(3)^(-)-N concentration increased instead of decreasing during some periods.The removal effect of TP,TN,NH_(4)^(+)-N and NO_(3)^(-)-N in wet season was better than that in normal season and dry season.The reduction process mainly occurred in the biological oxidation pond,while the surface flow wetland basically maintained the current water quality.Nemerow index analysis showed that 75.0%of the imported water quality of the wetland was severely polluted,25.0%was moderately polluted,58.3%of the exported water quality was slightly polluted and the remaining 41.7%was moderately polluted.The research shows that the composite constructed wetland system is practically significant to the treatment of industrial wastewater,animal husbandry sewage and domestic sewage mixed polluted water.

关 键 词：氧化塘 表流湿地 快速城镇化 流域污染 水质评估 

分 类 号：X522[环境科学与工程—环境工程]