Abstract
It is now clear that constructed wetlands for waste water treatment and nature conservation are wide spread in the USA and becoming more common in most European countries, Australia, in some regions of Asia and Africa. In this paper we analysed more than ten years experience of constructed wetlands implementation in the United Kingdom and Ukraine. A design, construction features and equations for constructed wetlands area estimation used in both countries are compared. The efficiency of BOD, SS and nitrogen removal by subsurface flow type and combined type flow constructed wetlands also discussed. On the basis of experience obtained on constructed wetlands implementation in both countries for storm water, run-off and drainage treatment, we suggest that they may be the best option to block diffuse sources of pollution.
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