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Generation characteristics of disinfection by-products (DBPs) by chlorination in sewage effluent
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2009, v.22 no.3, pp.272-276
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(2009). Generation characteristics of disinfection by-products (DBPs) by chlorination in sewage effluent. Analytical Science and Technology, 22(3), 272-276.
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Abstract
This study was performed to investigate the disinfection efficiency and the generation characteristics of disinfection by-products (DBPs) in the sewage effluent. In the case of total coliforms, disinfection efficiency higher than 99%, the required contact time was 30 min at chlorine dose of 0.5 ㎎/L, 20 min at 1.0 ㎎/L, and 10 min at 1.5 ㎎/L, respectively. When the sewage effluent was disinfected with chlorine dose of 0.5 ㎎/L for 10 min, the maximum generation concentration of trihalomethanes (THMs), haloacetonitriles (HANs) and haloacetic acid (HAAs) were 32.2 ㎍/L, 2.97 ㎍/L, and 16.29 ㎍/L, respectively. The concentration of chloroform was 28.4 ㎍/L corresponding to 88.1% of the THMs. The concentration of HANs and HAAs were found to be inconsiderable. The average residual chlorine concentration of sewage effluent was 0.4 ㎎/L, the generation concentration of THMs was maximum 1.72 ㎍/L and average 2.79 ㎍/L. HANs and HAAs were under the detection limit by GC/MSD
- keywords
- disinfection by-products, sewage effluent, THMs, HANs, HAAs
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