wastewater treatment
Wastewater treatment, also known as sewage treatment, the cleaning of impurities from sewage or wastewater, before it reaches to natural bodies of water like oceans rivers, estuaries and lakes. Since it is hard to find pure water in nature (i.e., outside chemical laboratories), any distinction between clean water and polluted water depends on the sort and concentration of impurities found in the water also as on its intended use. In broad terms, water is claimed to be polluted when it contains enough impurities to form it unfit for a specific use like swimming, fishing or drinking. Although water quality is suffering from natural conditions, the word pollution usually implies act because the source of contamination. Wastewater treatment plants are introduced to purify all the wastewater. Water pollution, is caused primarily by the drainage of contaminated wastewater into groundwater or surface water, and wastewater treatment may be a major element of pollution control. There are thre...