Sludge is a semisolid by-product obtained from municipal and industrial wastewater treatment. Sludge obtained from treatment of household and sewage water is called municipal sludge and sludge obtained from a by-product of industrial chemicals wastetreatment is called industrial sludge. Municipal and Industrial wastewater treatment comprises preliminary, primary, secondary, and tertia... https://www.maximizemarketresearch.com/market-report/global-municipal-and-industrial-sludge-treatment-market/81443/