LINDachao,SHENXinxu,LIAOZihong,et al.Feasibility Evaluation of a Novel Water Treatment Process Integrating with Ultrafiltration and Low?dose Sodium Hypochlorite Disinfection[J].China Water & Wastewater,2026,42(3):38-45.
超滤-低剂量次氯酸钠消毒净水模式可行性研究
- Title:
- Feasibility Evaluation of a Novel Water Treatment Process Integrating with Ultrafiltration and Low?dose Sodium Hypochlorite Disinfection
- Keywords:
- ultrafiltration; low-dose disinfection; sodium hypochlorite; water quality safety of drinking water distribution system; biofilm
- 摘要:
- 在超滤广泛应用背景下，研究低剂量次氯酸钠消毒对供水管网水质的影响，对现阶段在市政供水领域实现“双碳”目标并保障供水安全具有重要意义。本研究系统性考察了次氯酸钠投加量、母液浓度等工艺参数影响下“超滤-低剂量次氯酸钠消毒”新型净水模式对市政供水管网水质安全的保障效果。结果表明，超滤能够有效去除消毒副产物前驱物，降低了消毒剂投加量。次氯酸钠投加量为0.3 mg/L时，管道出水余氯、消毒副产物等相关指标仍符合《生活饮用水卫生标准》（GB 5749—2022）。相较于10%的次氯酸钠，5%的次氯酸钠更稳定，消毒效果更好。本研究为保障市政管网供水生物安全性和化学安全性提供了理论依据和技术支撑。
- Abstract:
- With the widespread application of ultrafiltration (UF), investigating the effects of low? dose sodium hypochlorite disinfection on water quality in drinking water distribution systems is of great significance for achieving dual-carbon goals in the municipal water supply sector while ensuring water safety. This study systematically evaluated the effectiveness of a novel “UF-low-dose sodium hypochlorite disinfection” water treatment mode under different conditions of sodium hypochlorite dosages and stock solution concentrations. The research results showed that UF effectively could remove precursors of disinfection by-products (DBPs), thereby reducing the required disinfectant dosage. When the sodium hypochlorite dosage was reduced to 0.3 mg/L, residual chlorine, DBPs, and other related indicators in the drinking water distribution system effluent still complied with the Standards for Drinking Water Quality (GB 5749-2022). 5% sodium hypochlorite stock solution exhibited better disinfection performance than the 10% one. These findings provides theoretical basis and technical support for improving both biological and chemical safety of drinking water supplies.
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