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. 2022 Aug 10:833:155001.
doi: 10.1016/j.scitotenv.2022.155001. Epub 2022 Apr 2.

Insights for booster chlorination strategy based on DBPs control in a large-scale water supply system

Shijun Zhu  1 , Huiming Zheng  1 , Huihong Sun  1 , Junping Liu  1 , Xiaoyan Ma  2 , Xueyan Li  3 , Qingsong Li  4 , Andrea M Dietrich  5
Affiliations

Insights for booster chlorination strategy based on DBPs control in a large-scale water supply system

Shijun Zhu et al. Sci Total Environ. .

Abstract

Based on a one-year field investigation of disinfection by-products (DBPs) in large scale water distribution system (LSWDS), the various characteristics of DBPs together with their correlation with booster chlorination were elaborated through ArcGIS model. Furthermore, the effects of booster chlorination on DBP formation were investigated through simulated experiments. Residual chlorine showed a strong relationship with occurrence of different DBPs in LSWDS, and the yield of DBPs increased significantly after booster chlorination. The simulated chlorination experiments showed that diminution of the ratio of primary to secondary (booster) chlorination dosage, and delaying the secondary chlorine addition reduced the generation of DBPs during water conveyance. The yield concentrations of THMs and HAAs obviously increased after booster chlorination. The correlation between HAAs and chlorine dosage is weaker in the field research than in the simulation experiment while THMs had a positive correlation with the chlorine addition in both field research and simulation experiment.

Keywords: Booster chlorination; Disinfection by-products; Disinfection control; Drinking water distribution system.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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