Phytoremediation for Purifying Urban Wastewaters in order to Decrease Oxygen, Chemical, Biochemical and Microbial Pollution of Choliforms

By raise of population and increasing growth of industry and agriculture, lack of consuming water sources is felt more than ever and newer approaches shall be chosen for reuse of consumed water. Reusing wastewater as well as supplying a part of humanʹs needs prevent the pollution of pure water sources and more damage, additional cost and consequences arisen from microbial pollutions especially excrement coliforms. There are several ways for water treatment from advanced excrement pollutions, but due to their high cost and environmental adverse effects of physical, chemical and traditional methods of refinery, researches emphasize on finding economical and useful ways. One method is Green Refinery in which a specific plant is used to clean and destroy environmental pollutants.In order to analyze and study capability and efficiency of phytoremediation, a drained pilot land in vase form divided into two parts of treatment and observation, in a near distance to pool containing fish and pure water branched from urban wastewater was used, and feasibility of microbial pollutions treatment of water through absorption by three red pigweed, golden pigweed and fescue was studied. Capability of biologic method in urban wastewater treatment is desired. Reducing microbial pollutants by phytoremediation is to what extent. So that the efficiency of eliminating coliform 90%, excrement coliform Ecoli 100% and BOD and COD reduction efficiency are 90% and 80% respectively. According to obtained results from these three plants on test, red pigweed is more capable than golden pigweed and fescue in eliminating microbial pollutants, but the plant itself affected by concentration of microbial pollutants is irresistible and ultimately will be removed.Second plant, fescue, has resistance against changes of microbial pollutants and is more capable in pollutants absorption. In last stage, golden pigweed has less capability in elimination of pollutant.