我国尾水型人工湿地发展现状
|
摘要
污水厂尾水水质的提升在水环境质量改善中起到日益重要的作用,而人工湿地具有运行费用低、景观效果好等优点,在尾水水质的提升中具有良好的应用前景。尾水型人工湿地可分为塘-表、塘-床、(塘)-床-表、强化预处理型四种常见类型,分析了各种类型工艺的特点,并介绍了实际工程案例。同时,提出了应因地制宜地采用人工湿地工艺类型,从全生命周期的角度考虑湿地的建设和运营,并加强人工湿地建成后的效果评估,以最大化地发挥人工湿地的综合效益。
Improvement of wastewater treatment plant terminal effluent quality has played more and more important roles in the protection of surface water quality. Constructed wetlands (CWs) with advantages such as low cost and good effect could be widely applied in treatment of terminal effluent of WWTPs. According to the classification of the treatment methods,CWs for treatment of terminal effluent were divided into four types including stabilization pond-surface flow wetland,stabilization pond-subsurface flow wetland, (stabilization pond)-subsurface flow wetland-surface flow wetland,and intensive pretreatment. The characteristics of various types of CWs were analyzed,and practical cases were introduced. In addition,some suggestions were concluded as follows: the CWs types should be adopted according to local conditions; the construction and operation of wetland should be considered in view of the whole life cycle; and the effect evaluation of constructed wetland should be strengthened. As a result,the comprehensive benefits could be maximized in the application of CWs.
Improvement of wastewater treatment plant terminal effluent quality has played more and more important roles in the protection of surface water quality. Constructed wetlands (CWs) with advantages such as low cost and good effect could be widely applied in treatment of terminal effluent of WWTPs. According to the classification of the treatment methods,CWs for treatment of terminal effluent were divided into four types including stabilization pond-surface flow wetland,stabilization pond-subsurface flow wetland, (stabilization pond)-subsurface flow wetland-surface flow wetland,and intensive pretreatment. The characteristics of various types of CWs were analyzed,and practical cases were introduced. In addition,some suggestions were concluded as follows: the CWs types should be adopted according to local conditions; the construction and operation of wetland should be considered in view of the whole life cycle; and the effect evaluation of constructed wetland should be strengthened. As a result,the comprehensive benefits could be maximized in the application of CWs.
引文
[1]刘亦凡,陈涛,李军.中国城镇污水处理厂提标改造工艺及运行案例[J].中国给水排水,2016,32(16):36-41.Liu Yifan,Chen Tao,Li Jun.Process analysis of upgrading and reconstruction of municipal wastewater treatment plants in China[J].China Water&Wastewater,2016,32(16):36-41(in Chinese).
[2]郑兴灿.城镇污水处理技术升级的挑战与机遇[J].给水排水,2015,41(7):1-7.Zheng Xingcan.Opportunity and challenge in the municipal sewerage treatment technology upgrading[J].Water&Wastewater Engineering,2015,41(7):1-7(in Chinese).
[3]Zhang T,Xu D,He F,et al.Application of constructed wetland for water pollution control in China during 1990-2010[J].Ecol Eng,2012,47:189-197.
[4]李小艳,丁爱中,郑蕾,等.1990-2015年人工湿地在我国污水治理中的应用分析[J].环境工程,2018,36(4):11-17,5.Li Xiaoyan,Ding Aizhong,Zheng Lei,et al.Application of constructed wetlands for water pollution treatment in China during 1990-2015[J].Environmental Engineering,2018,36(4):11-17,5(in Chinese).
[2]郑兴灿.城镇污水处理技术升级的挑战与机遇[J].给水排水,2015,41(7):1-7.Zheng Xingcan.Opportunity and challenge in the municipal sewerage treatment technology upgrading[J].Water&Wastewater Engineering,2015,41(7):1-7(in Chinese).
[3]Zhang T,Xu D,He F,et al.Application of constructed wetland for water pollution control in China during 1990-2010[J].Ecol Eng,2012,47:189-197.
[4]李小艳,丁爱中,郑蕾,等.1990-2015年人工湿地在我国污水治理中的应用分析[J].环境工程,2018,36(4):11-17,5.Li Xiaoyan,Ding Aizhong,Zheng Lei,et al.Application of constructed wetlands for water pollution treatment in China during 1990-2015[J].Environmental Engineering,2018,36(4):11-17,5(in Chinese).