Minimization of the Disinfection by-Product Precursors in Treated Waters Exposed to Ozone and Chlorine

Abstract:

The objectives of this study were to investigate impact of preoxidation on disinfection by-product (DBP) precursors in drinking water via two different preoxidation methods. The full-scale study was conducted on surface river water in a water supply plant in Tianjin, China. Two treatment trains were performed, with prechlorination and preozonation as preoxidation methods, respectively. The water samples were collected on different stages along the treatment processes and analyzed by following organic parameters: dissolved organic carbon (DOC), UV₂₅₄ and specific ultraviolet absorbance (SUVA). The results indicated that Train 2 with preozonation was more effective to reduce DBP precursors. Preozonation possessed an excellent ability in the removal of UV₂₅₄ and SUVA, the removal efficiencies were 25.14% and 18.77%, respectively, comparing to the removal rates of 6.66% and 5.64% during prechlorination, separately.

• Periodical: Advanced Materials Research (Volumes 884-885)
• Pages: 91-95
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.884-885.91
• Online since: January 2014
• Authors: Shang Chao Yue*, Le Jun Zhao, Xiu Duo Wang, Qi Shan Wang, Feng Hua He
• Keywords: DOC, Full-Scale, Prechlorination, Preozonation, UV₂₅₄

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