Wastewater

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Any amount of water which has been used by human beings and then discarded is known as wastewater. It includes liquid wastes originating from domestic, commercial enterprises, industry and agriculture. These wastes contain a very wide range of contaminating agents in various concentrations. It is the waste from towns and villages made up by mixing used water with contamination arising from different sources. Sewage is usually contaminated with human discharges but also it includes waste products disposed off to the sewers, coming from industrial and commercial liquid waste products. Such wastes reach the sewers through pipes, channels and similar structure. Wastewater or sewage originates from a large number of sources but these can be broadly divided into five categories namely domestic, commercial, industrial, agricultural and natural.