Sewage generated from residential, institutional, commercial and industrial establishments. It includes household waste liquid from toilets, and sinks draining into sewers. Large volumes of sewage is generated on daily basis from different setups and establishments. Sewage Treatment Plants utilizes biological treatment process for treating the sewage and disposing it of safely in the environment or with further tertiary treatment it can be used for irrigation and gardening purpose. Advanced sewage treatment process utilizes membrane based technologies for reusing of the treated sewage for toilet flushing purpose.
Sewage treatment is the process of removing contaminants from municipal wastewater, containing mainly household sewage. Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater (or treated effluent) that is safe enough for release into the environment. A by-product of sewage treatment is a semi-solid waste or slurry, called sewage sludge. The sludge has to undergo further treatment before being suitable for disposal or application to land.
Sewage treatment may also be referred to as wastewater treatment. The first part of filtration of sewage typically includes a bar screen to filter solids and large objects which are then collected in dumpsters and disposed of in landfills. Fat and grease is also removed before the primary treatment of sewage.
Major technologies utilized for sewage treatment are MBBR, MBR, SAFF, SBR and extended aeration process.