Experimental Study on Fly Ash for Conditioning of Specific Resistance of Sludge Water

摘要

Discharge of sludge from water works into waters will result in theincreased deterioration of water environment. Therefore, an experimental studywas conducted on the addition of conditioning agent to improve sludgedewatering performance. The result shows that coagulation is inadaptable to thetreatment of sludge from water works and use of powdered coal ash from powerplant as conditioning agent can greatly reduce the specific resistance ofsludge and the dewatering performance can be improved. The optimal dosage offine powdered coal is 20g/100mL and coarse powdered coal is 30g/100mL. Powdered coalis mixed with sludge to form filter cake, which is blended with coal in certainproportion to make into fuel. So that incineration of sludge from water workscan be realized.