Improvement and development trend of wastewater reuse technology.

Effects of enhanced coagulation for turbidity and TOC removal in water were studied through jar and dynamic coagulation test. The impact factors including type and dosage of coagulants,pH and temperature of water were analyzed. Results showed that under the optimal dosage of polymeric aluminum chloride (PAC)30mg/L,removal rates of turbidity and TOC were 90.19% and 38.2% respectively. Under the temperature of water above 20℃,removal rates of turbidity and TOC were 84.95% and 33.18% for PAC. Result of dynamic test showed that although pH value is the main factor,the enhanced coagulation technique could effectively improve water quality. Turbidity was 0.1NTU and TOC was 6.23mg/L in the filtrated water quality.