Water Treatment Plants are combination of a series of filter membranes that work on principle of reverse osmosis. They are highly appreciated for having excellent recovery rate with high contaminant retention ability. These plants operate by passing water at high pressure through filters that not only trap suspended solids but also removes heavy metals & pathogens. They can efficiently treat effluents produced by industrial processes & houses. These plants also treat remaining solid to assure its safe disposal in environment friendly manner. Waste water in treatment plants is generally processed in four steps including preliminary, primary, secondary, & tertiary.