基于大型供水系统中 DBPs 控制的强化氯化策略的见解。
Insights for booster chlorination strategy based on DBPs control in a large-scale water supply system.
机构信息
College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
出版信息
Sci Total Environ. 2022 Aug 10;833:155001. doi: 10.1016/j.scitotenv.2022.155001. Epub 2022 Apr 2.
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.
基于对大型供水系统（LSWDS）中消毒副产物（DBPs）进行的为期一年的现场调查，通过 ArcGIS 模型阐述了 DBPs 的各种特性及其与强化氯化作用的关系。此外，还通过模拟实验研究了强化氯化作用对 DBP 形成的影响。残余氯与 LSWDS 中不同 DBPs 的发生有很强的关系，强化氯化后 DBPs 的生成率显著增加。模拟氯化实验表明，减少主氯和次氯（强化）加氯剂量的比例，以及延迟二次加氯，可减少输水过程中 DBPs 的生成。THMs 和 HAAs 的生成浓度在强化氯化后明显增加。现场研究中 HAAs 与氯剂量之间的相关性比模拟实验弱，而 THMs 在现场研究和模拟实验中均与氯的添加呈正相关。
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