Water & Sewage Treatment Plants These Water & Sewage Treatment Plants are well suited for expelling impurities from effluent including both domestic and runoff. The offered plants work on aerobic process to remove harmful material from water. These plants also help in keeping environment hygienic and clean by purifying the waste water. Beside this, the offered Water & Sewage Treatment Plants comprise biological, chemical and physical procedures to evacuate all the impurities from the water.