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《Journal of Zhongkai University of Agriculture and Engineering》 2011-02
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Purifying effect of Hydrocotyle vulgaris L. on municipal domestic wastewater

ZHOU Yi-pin,LIU Wen,LEI Ze-xiang,LIN Liu-juan,HUANG Yan-ni(College of Environmental Science and Engineering,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China)  
Three kinds of ecological floating beds made of Hydrocotyle vulgaris L.were used to study the removal effects on CODCr,nitrogen and phosphorus in municipal domestic wastewater.The experiment was implemented for 32 days.The results indicated that H.vulgaris was adaptable to grow in municipal domestic wastewater of three concentrations,and their biomass,height and root significantly increased at the end of experiment.The removal rates of CODCr in high-concentration,medium-concentration and low-concentration of municipal domestic wastewater were 94.99%,84.97% and 88.71%,respectively;the removal rates of TN were 76.85%,65.24% and 57.34%,respectively;the removal rates of TP were 92.17%,84.71% and 73.24%,respectively.Based on the good purifying effect on CODCr,nitrogen and phosphorus removal,H.vulgaris is recommended as a specie of aquatic vegetation in phytoremediation of municipal domestic wastewater.
【Key Words】: Hydrocotyle vulgaris L. municipal domestic wastewater nitrogen and phosphorus purification
【Fund】: 广东省科技计划(2008B060600005)资助项目
【CateGory Index】: X703
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