The Effluent treatment plant is designed to treat the effluent coming from different areas of the plant. Effluent Treatment Plants or ETPs are to purify water and remove any toxic and noneffluent-treatment-plant toxic materials or chemicals from it. These plants are used for environment protection. An ETP plant is a plant where the treatment of industrial effluents and waste water is done. Effluent treatment is basically waste  treatment. The ETP plants are used widely in more or less all type of process  industries to reduce  BOD, COD, suspended solids & other contaminants  from waste water. The effluent water treatment plants are installed to reduce the possibility of pollution.