EFFECTS OF WTP SLUDGE DOSAGE AND PADDLE SPEED ON THE REMOVAL OF SUSPENDED PARTICULATE MATTER IN MUNICIPAL WASTE WATER

Alum is used as a coagulant in a water treatment plant (WTP) to remove the turbidity and lime is used to balance the pH value, a large volume of alum lime combined WTP sludge is generated. The sludge's characteristics depend on the water source and the quality and quantity of the chemicals used. Disposal of this sludge is a major challenge faced by WTPs around the world. In this paper an attempt has been made to study the feasibility of WTP sludge to treat the municipal waste water in the preliminary stage. The scope of the study are (1)The quantity of BOD,COD, Total suspended solids in the treated water will be studied (2) The reactiveness of WTP sludge with the waste water will be studied by varying the operating paddle speed condition of the sludge. The WTP sludge will be applied with municipal sewage to a series of jar tests conducted under various operating paddle speed conditions at pH 7.95. It is observed that the BOD, COD, TSS values of the sewage is considerably reduced while adding the WTP sludge and the removal efficiency is mainly depending upon the dosage of the WTP sludge, and operating paddle speed condition.