بررسي نقش گياهان در پالايش طبيعي آب هاي آلوده شهري موردفپالايش آب هاي آلوده ي شهري تهران با نيزار مصنوعي

Investigation of Wetland Plants Role as a Natural Treatment for the Urban Polluted Water in Tehran, With Artificial Canebrake

Human has been suffering significantly from the pollution in their environment, caused by climatic changes. Water pollution, is one of the major pollution sources to our living environment, which considering to freshwaters shortage has direct effectiveness on the countryʹs progress. Investing on water quality treatment is therefore vital to every society, as well as to our country and enforce considerable expenses to cities and countries. Based on climatic conditions, social activities, and economical potentials, a substantial research is required for implementing a new methodology for any water quality treatment project. One of the best solution to the existing problems can be natural system of water treatment by means of wetlands. The proposed method is simple, economical, technical, low- consumption energy and very much effective for improving quality our living environment. Therefore, in this research, the role of wetlands in sewage treatment was studied. Also the performance and the efficiency of a pilot- scale subsurface constructed wetland with Phragmitis Australis to treat in Tehran is recommended. The results reveal that this method can reduce BOD5(19±4m L), COD(40 f 3mg/L), TSS (36±20mg/L), Laver of drinking water standards and reduce "Fecal Coliform" more than 99 percent.