Sewage is a mixture of domestic and industrial wastes, and it is a carrier of disease. It is harmful and includes a number of various types of wastes as follows.
• Kitchen waste
• Hospital waste
• Electronic waste
• Agricultural waste
• Ions and harmful micro-organisms etc.
• some ions and metals like chlorides, sulphides, and mercury
Sewage water doesn’t have any use to reduce the threat of water pollution. So, sewage water should send it to the sewage water treatment process, before discharged into the rivers.
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