| Title |
Formation Characteristics of Disinfection By-Products using Chlorine Disinfection in Sewage Effluent |
| Authors |
백영석 ( Young Seog Beck ) ; 송민형 ( Min Hyung Song ) ; 정경훈 ( Kyung Hun Jung ) ; 권동식 ( Dong Sik Kwon ) ; 이기공 ( Gi Gong Lee ) |
| Keywords |
Sewage effluent; Chlorination; DBPs; THMs; DCAA; TCAA |
| Abstract |
This study was performed to investigate the disinfection efficiency and the formation characteristics of disinfection by-products(DBPs) by chlorination in the sewage effluent. The effluent was sampled from the sewage treatment plants operated in the activated sludge process and the advanced sewage process. The type of DBPs investigated were Trihalomethanes(THMs), Dichloroacetonitrile(DCAN), Chloral hydrate(CH), Dichloroacetic acid(DCAA), Trichloroacetic acid(TCAA). Major findings are as follows. First, the optimum injection concentration for chlorination in sewage effluent were found to be in the range 0.5 ~ 1.0 ㎎ Cl₂/L. Also, It was found that the chlorine dosage in the effluent of activated sludge process was higher than in the effluent of advanced sewage process. Second, the maximum formation concentration of THMs were 12.7 μg/L. The THMs formation reaction was finished in a short time of several seconds and chloroform was mainly formed. Also, it was found that the concentration of ammonium nitrogen is higher, the concentration of THMs is lower. Third, it was found that DCAA and TCAA were mainly formed as DBPs by disinfection. |