ZHOU Zi-chong,YANG Xu,XIAO Rong,et al.Technical Principle and Application of Multi-point Chlorination in High Algae Water Treatment[J].China Water & Wastewater,2021,37(12):109-115.
应对高藻原水的水厂多点加氯技术原理与应用
- Title:
- Technical Principle and Application of Multi-point Chlorination in High Algae Water Treatment
- Keywords:
- Taihu Lake basin; drinking water; high algae; multi-point chlorination; disinfection by-products
- 摘要:
- 在经济高速发展和人口高度密集的太湖流域，部分区域水源依然面临着水体富营养化、蓝藻水华季节性暴发的水质问题。梳理了太湖流域高藻水源水质特征以及净水工艺面临的挑战，从消毒副产物控制角度介绍了水厂多点加氯技术原理，从取水口预加氯、混凝池前加氯、砂滤池前加氯、炭滤池后加氯、出厂水补加氯各环节阐释了多点加氯技术在水厂各工艺环节的净水技术内涵。通过近10年长尺度的连续监测评估，验证了多点加氯技术对含碳和含氮消毒副产物的协同控制效果，为采用太湖等湖库型水源的水厂提供了可复制可参考的工艺方案。
- Abstract:
- In the Taihu Lake basin, with rapid economic development and high population density, some regional water sources are still facing water quality problems such as eutrophication of water bodies and seasonal outbreaks of cyanobacteria blooms. This article summarizes the water quality characteristics of high algae water sources in the Taihu Lake basin and the challenges faced by the water purification process. From the perspective of disinfection by-products control, the principle of multi-point chlorination technology in waterworks is introduced.This paper also explains the water purification connotation of multi-point chlorination technology in which chlorine is dosed at water intake (pre-chlorination), before coagulation tank, before sand filter, after activated carbon filter as well as into finished water. Through the longscale continuous monitoring and evaluation in the past ten years, the multi-point chlorination process has demonstrated the synergistic control effect of carbonaceous and nitrogenous disinfection by-products, and provided a reproducible and referenceable process plan for waterworks using lake reservoir-type water sources such as Taihu Lake.
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