Study on Emergent Treatment of Raw Water Using Powdered Activated Carbon

Aim at the status of water source of a water work in Shanghai,this study was conducted to add powdered activated carbon(PAC) for emergent treatment of conventional organic pollution as well as accidental toxic pollution of water quality by simulation.The results showed that the powdered carbon of coal were available for water purification.The optimum adsorption and economic feasibility could be got when the dosage was 20~30 mg/L at suction well.It was helpful for coagulation sedimentation when the PAC dosage was low.However,if the PAC dosage came to 50 mg/L or more,the particles in settled water would be more than usual by 30%,which was unfavorable of sequential filtration.Addition of PAC had certain influence on prechlorination of raw water.