WANGYong-qiang,LIGui-fang,SONGWu-chang,et al.Removal Characteristics of Organic Matter in Effluent from Conventional Sand Filtration by UV/H2O2 Process[J].China Water & Wastewater,2022,38(17):60-66.
UV/H2O2工艺对常规砂滤出水中有机物的去除特性
- Title:
- Removal Characteristics of Organic Matter in Effluent from Conventional Sand Filtration by UV/H2O2 Process
- 关键词:
- UV/H2O2工艺; 有机物; 2-甲基异莰醇（2-MIB）; 三卤甲烷生成势
- Keywords:
- UV/H2O2 process; organic matter; 2-methylisoborneol (2-MIB); trihalomethane formation potentials
- 摘要:
- 针对UV/H2O2水处理过程中有机物特性变化尚不明确等问题，以某水厂（以引黄水库水为原水，采用常规处理工艺）的砂滤出水为处理对象，构建了规模为5 m3/h的UV/H2O2中试系统，长期稳定运行结果显示，H2O2利用率为46%左右，CODMn和UV254的平均去除率分别为5.7%和50.3%，当2-甲基异莰醇（2-MIB）加标浓度为110 ng/L时去除率几乎可达100%。对工艺进出水中有机物的分子质量分布、三维荧光光谱、溶解性有机物（DOM）组分、三卤甲烷生成势（THMFPs）进行分析发现，该工艺可将水中的大分子有机物降解为小分子有机物，出水中荧光物质减少、芳香性降低，DOM各组分含量减少、占比改变，THMFPs略有增加。
- Abstract:
- The change of organic matter properties in UV/H2O2 treatment process is still not clear. The UV/H2O2 pilot-scale system with scale of 5 m3/h was constructed to treat the effluent from sand filtration of a water treatment plant (Yellow River diversion reservoir raw water, conventional treatment process). The long-term operational results showed that the H2O2 utilization rate was approximately 46%, and the average removal efficiencies of CODMn and UV254 were 5.7% and 50.3% respectively. When the spiked concentration of 2-methylisoborneol was 110 ng/L, its removal efficiency was almost 100%. The molecular weight distribution, three-dimensional fluorescence spectrum, component of dissolved organic matter (DOM) and trihalomethane formation potentials (THMFPs) in influent and effluent of the process were analyzed. The process could degrade the macromolecular organic matter in water into small molecule organic matter, reduce fluorescence substance concentrations and aromatic, decrease DOM components content and change their proportions, and slightly increase THMFPs.
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