Techniques for minimizing the excess sludge of wastewater treatment in various industrial sectors

Abstract

Determination of COD and BOD in waste water from sludge can be reduced by using low cost adsorbent like Wooden Based Activated Charcoal (WBAC) and Laterite in a column used as a stationary phase. The parameters like specific gravity, viscosity, total suspended solids and pH are reduced with great effect by using WBAC and Laterite as a permanent adsorbent. The fixed bed efficiencies can be compared by changing the bed ration of adsorbent. The whole study of optimizing parameters has been done in column chromatography to compare the result of after treatment and before treatment. The fixed bed of WBAC and Laterite reduces COD and BOD value to 70 and 75% respectively. The ration of WBAC and Larerite in 2:3, 2:1, 1:3, 1:2 and 1:1 reduces the COD percentage as 66, 67, 71, 75 and 65% respectively and the BOD value is reduced as 71, 72, 73, 74 and 67% respectively. This is the maximum value of minimization of COD and BOD from waste water of dairy industry. Thus, it is a cheaper method for minimizing the excess sludge of wastewater treatment in various sectors.