Sewage treatment plants are generally used for the treatment of wastewater so that it can be made fit for use in the fulfillment of other purposes, even the wastewater coming out of various manufacturing and supplying units is not fit to be released in the environment or in the water bodies, releasing the wastewater coming out from the industries or even from the residential complexes into the environment without any treatment done can be really very much hazardous for the environment and also for the health of the people living on Earth.
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