东莞燕岭湿地景观水体富营养化的现状及机理分析  

Eutrophication Status and Mechanism of Landscape Water Body in Yanling Wetland in Dongguan

作　　者：李萍[1,2] 钟敏 吴鹏举[2] 黄娜 

机构地区：[1]广东工业大学环境科学与工程学院,广东广州510006 [2]东莞松山湖高新技术产业开发区绿色低碳发展促进中心,广东东莞523668

出　　处：《中国给水排水》2018年第5期47-51,共5页China Water & Wastewater

基　　金：东莞市社会科技发展项目(2016108101013)

摘　　要：跟踪检测东莞燕岭湿地景观水体中叶绿素a、TN、TP、COD、BOD_5等水质指标,并分析了景观水体富营养化的现状及其机理。结果表明,景观水系统不同检测断面的叶绿素a含量差别较大(0.1~32.5 mg/m^3),叶绿素a含量沿水流方向逐渐增大,且呈现季节性暴发的特点;垂直流人工湿地对叶绿素a的去除率在90%以上。叶绿素a与TP、TN、COD、BOD_5浓度的相关性分析显示,氮和磷促进藻类生长的同时,藻类的增殖将有助于降低水体中的氮、磷浓度,同时会增加水体中的有机物浓度。建议在提高高位水池和垂直流人工湿地脱氮除磷能力的同时,在景观河流中补充食藻生物孵化器,通过生物除藻降低水体富营养化程度。Chlorophyll a （chl-a） , TN, TP, COD, BOD5 and other water quality indicators of Yanling wetland landscape water body in Dongguan were detected, and status and mechanism of the land- scape water body eutrophication were analyzed. The results showed that chl-a concentrations （0.1 - 32.5 mg/m3） in different detection sections of the landscape water system were significantly different. The content of chl-a gradually increased along the river direction which showed the characteristics of seasonal outbreak. The removal rate of chl-a by vertical flow constructed wetland was more than 90%. Correlation analysis of the concentrations of chl-a, BODs, TN, COD and TP showed that the growth of algae could be promoted by nitrogen and phosphorus, while the proliferation of algae would be helpful to reduce the con- centrations of nitrogen and phosphorus, which simultaneously increase the content of organic matter in water. Except for increasing the height of the head tank and improvement of nitrogen and phosphorus re- moval ability of vertical flow constructed wetland, installation of biological incubator for algae predation could be also took into account where eutrophication degree of landscape water body was reduced by bio- logical alga-killing technique.

关 键 词：景观水体 富营养化 叶绿素A 人工湿地 

分 类 号：TU993.1[建筑科学—市政工程]