Sewage treatment plant (STP) is one of the mostly used wastewater treatment plant, followed by Effluent Treatment Plant (ETP) and Common and Combined Effluent Treatment Plants (CETP). The reason that generated a strong need to use this treatment plant is to transform wastewater or household sewage into solid waste or waste stream apt for re-use or discharge into environment, by removing contaminants of all kinds, like chemical, biological and physical. The processes followed for the same are chemical, biological and physical. It is helpful in saving people from waterborne diseases. It is done for the betterment of the society.