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with sewage treatment technology and sanitary and septic wastewater treatment. It is consumed and extraneous and pollutant entering it, the original quality of water is lost and is no longer usable, which is called sewage. D Sewage treatment The process of removing pollutants from wastewater, in particular household sewage, is a biological process for removing these pollutants and providing refined wastewater that is safe for the environment. Usually one of the products of sewage treatment is half-finished waste, which is called sewage sludge, which requires separate treatment before landfill or use. Water is daily for various human activities, including washing, bathing and cooking, as well as leaching. The wastewater content contains 99.9% water and about 0.1% impurities and pollutants. Usually, the amount of wastewater that is considered in the scheme is equivalent to the average daily amount of sewage during non-rainfall. In general, this is the average amount of contract, and in principle, at different hours of the day, this amount is less or more than the average. One of the ways to determine the average amount of wastewater per day is to determine the amount of water consumed in the city. Generally, as recommended by the Standards Committee's Wastewater Committee, as long as the actual measurements of