Study On The Treatment Of Urban Domestic Sewage By The Sepiolite Constructed Wetland

The constructed wetland technology which applying to treat the sewage and industry wastewater being attentioned more and more nowadays with its lower investment,simpler technics,better outflow quantity and easier management.The study of the wetlands is fashion throughout of the world. So many researchers have studied the constitution,the capability of get rid of contamination, theory of reaction and so on.And the constructed wetlands have been applying in practices to testify its function.It shows that the constructed wetland have a good foreground in the towns and villages of our country.This paper study the constructed wetlands that builded up with sepilite which is a kind of mines get from leping of Jiangxi province and choose the plant—Vetiveria which adapt the environment well and can get rid of the contamination by its character.We draw the conlusion that the wetlands can get rid of COD_cr ,NH₄-N and TP well by the experiments.the kinetics study show that the diminish of COD_cr ,NH₄-N and TP are satisfied with the one-stage equation:The study also show that the factors such as temperature,pH,load of hydraulic have little affection on constructed wetland,and there is no evidence that the conduction has relation with COD_cr of outflow..And,this paper discuss the theory of wetland ,point out the problems we meet in the experiment,give the excuse of myself.the study can be used to indicate the work in the future and in practice.