ZHANGYu-feng,CHENSa,CAOYu-an,et al.Optimization of UV/VUV/Chlorine Advanced Oxidation for Removal of Odor Compounds by Response Surface Methodology[J].China Water & Wastewater,2025,41(17):57-62.
响应曲面法优化双波长紫外/次氯酸钠去除嗅味物质
- Title:
- Optimization of UV/VUV/Chlorine Advanced Oxidation for Removal of Odor Compounds by Response Surface Methodology
- 关键词:
- 嗅味物质; 2-甲基异莰醇; 双波长紫外/次氯酸钠; 响应曲面法
- Keywords:
- odor compounds; 2-MIB; UV/VUV/chlorine; response surface methodology
- 摘要:
- 为解决饮用水厂普遍面临的藻源嗅味污染问题，在广东省某水厂开展双波长紫外/次氯酸钠高级氧化体系去除典型嗅味物质2-甲基异莰醇（2-MIB）的中试研究。结果表明，双波长紫外/次氯酸钠对2-MIB的去除率高达94.9%，原水pH、次氯酸钠投加量和紫外剂量是重要影响因素。利用响应曲面法构建了以2-MIB去除率为响应值的数值拟合模型，预测准确率在97%以上。基于构建的拟合模型，提出了2-MIB初始浓度分别为20、50、100 ng/L时的双波长紫外/次氯酸钠高级氧化最优工艺条件，在保证出水2-MIB浓度稳定低于10 ng/L国标要求下，成本仅增加0.18~0.34元/m3。双波长紫外/次氯酸钠高级氧化技术具有占地少、启闭灵活、运行管理容易等优点，对于受季节性嗅味污染的中小型水厂极具优势。
- Abstract:
- To address the algal odor issue in drinking water treatment plants, this work conducted a pilot study on the removal of the typical odor substance 2-methylisoborneol (2-MIB) using a dual-wavelength ultraviolet (254 nm and 185 nm) / sodium hypochlorite advanced oxidation system (UV/VUV/chlorine) at a water treatment plant in Guangdong Province. The results indicated that the removal rate of 2-MIB by UV/VUV/chlorine system could reach up to 94.9%. The pH of the raw water, the dosage of sodium hypochlorite, and the UV dose were important influencing factors. Using response surface methodology, a numerical fitting model was constructed with the removal rate of 2-MIB as the response value, achieving a prediction accuracy of over 97%. For the common three levels of 2-MIB pollution in water treatment plants (20 ng/L, 50 ng/L, and 100 ng/L), optimal conditions for UV/VUV/chlorine have been proposed. Under the condition that the 2-MIB concentration in the effluent remained stable and below the national standard requirement of 10 ng/L, the cost per cubic meter of water only increases by 0.18-0.34 yuan. The application of UV/VUV/chlorine technology has the characteristics of small footprint, flexible operation, and easy management, making it highly advantageous for small-and medium-sized water treatment plants that are affected by seasonal odor pollution.
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