Optimization of Four Kinds of Constructed Wetlands Substrate Combination Treating Domestic Sewage

查看全文 作　　者：REN Yongzheng ZHANG Beiping LIU Zhen WANG [1]Jin

机构地区：[1]School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

出　　处：《Wuhan University Journal of Natural Sciences》索引2007年第12卷第6期,共7页

基　　金：Supported by the National High Technology Research and Development Program of China (863 Program) (2003AA601110) 摘　　要：Based on the static and dynamic experiments, this paper has analyzed the adsorbing capacity for domestic wastewa-ter pollutant (COD, NH4+-N and TP) of four kinds of constructed wetlands substrate which were fly ash, hollow brick crumbs, coal cinder and activated carbon pellets in single and combined condi-tion. In the static experiments, the adsorbing capacity of four sub-strates all grew as the adsorbing dose increased. In adsorbing COD, each substrate’s adsorbing capacity rises with the adsorbing dos-age. Simultaneously, experiments show that all the adsorption of the four kinds of substrate for COD, NH4+-N and TP follows the Freundich Rule. The dynamic experiment demonstrated that the adsorbing capacity of combined substrates is bigger than that of single substrate. Fly ash in combination with small coal cinder adsorbs COD the best, while it takes in NH4+-N and TP the best when working with hollow brick crumbs. The combination of the two raises the removal rates up to 89% and 81% respectively. Given high cost and low adsorbing effect, activated carbon is not a suitable candidate for constructed wetlands substrate. 关键词：湿地构造衬底生活水污染吸附催化

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Optimization of Four Kinds of Constructed Wetlands Substrate Combination Treating Domestic Sewage

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