HUANGHui-ting,CAIJia-nan,SUNWen-yu,et al.Effect of Pre-chlorination Combined with Ultraviolet Disinfection on Formation of Disinfection By-products Induced by Algae in Raw Water[J].China Water & Wastewater,2025,41(9):40-46.
预氯化协同紫外消毒对原水藻类生成DBPs的影响
- Title:
- Effect of Pre-chlorination Combined with Ultraviolet Disinfection on Formation of Disinfection By-products Induced by Algae in Raw Water
- Keywords:
- South-to-North Water Diversion Project; algae; pre-chlorination; ultraviolet disinfection; disinfection by-products
- 摘要:
- 针对南水北调中线工程丹江口水库原水，考察其优势藻种以及有机物和藻类胞内外有机物在预氯化、预氯化协同紫外消毒条件下的消毒副产物（DBPs）生成情况。结果表明，次氯酸钠的强氧化作用对蓝藻的影响最为明显；藻类的胞内有机物不是DBPs的主要前体物，DBPs的主要前体物为原水中的有机物和藻类胞外有机物；氯投加剂量决定了DBPs的生成潜能；协同的紫外消毒在有余氯存在的情况下会促进生成更多的DBPs。
- Abstract:
- The formation of disinfection by-products (DBPs) from dominant algae species, organic matter, and algae in the raw water of the Danjiangkou Reservoir, located along the middle route of the South-to-North Water Diversion Project, was systematically investigated under both pre-chlorination and ultraviolet disinfection conditions. The potent oxidizing properties of sodium hypochlorite exhibited the most significant impact on cyanobacteria. The intracellular organic matter of algae was not the primary precursor of DBPs. Instead, the main precursors of DBPs were the organic matter and the extracellular organic matter of algae in raw water. The formation potential of DBPs was assessed based on the chlorine dosage. The synergistic UV disinfection could lead to the formation of increased DBPs when excess chlorine was present.
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