WANGPeng,GUO Jie,LUDan,et al.Dissolved Organic Matter Conversion and Disinfection By-products Formation Characteristics in Wastewater Treatment Plant Based on Spectral Analysis[J].China Water & Wastewater,2023,39(5):53-59.
基于光谱法解析污水厂DOM转化与DBPs生成特征
- Title:
- Dissolved Organic Matter Conversion and Disinfection By-products Formation Characteristics in Wastewater Treatment Plant Based on Spectral Analysis
- Keywords:
- wastewater treatment plant; dissolved organic matter; fluorescence regional integration; parallel factor analysis; disinfection by-products
- 摘要:
- 通过检测污水处理厂进、出水以及各处理单元出水的理化指标，结合三维荧光光谱和紫外光谱特征，对污水处理厂中溶解性有机物（DOM）的迁移转化进行解析。结果表明，应用荧光区域积分法与平行因子分析法识别出污水中的2个特征荧光组分为类色氨酸（C1，275 nm/330 nm）和类富里酸（C2，290 nm/420 nm），在污水厂全流程处理工艺中，C1下降了85%、C2下降了50%；荧光组分与常规水质指标COD、BOD5、TOC以及UV254等均呈极显著正相关。加氯消毒后DOM的荧光特征峰出现蓝移，在出水中检测到的消毒副产物（DBPs）主要为三氯甲烷、二氯乙酸和三氯乙酸，浓度分别为16.3、19.0和23.8 μg/L，应受到关注。
- Abstract:
- The physical and chemical indexes of the influent and effluent of a wastewater treatment plant (WWTP) and effluent of each treatment unit were detected, and the conversion of dissolved organic matter (DOM) in the WWTP was analyzed based on the three-dimensional fluorescence and ultraviolet spectral characteristics of the wastewater. Two characteristic fluorescent groups in wastewater were identified by fluorescence regional integration method and parallel factor analysis, which could be divided into tryptophan-like component C1 (275 nm/330 nm) and fulvic acid-like component C2 (290 nm/420 nm). In the whole treatment process of WWTP, C1 decreased by 85% and C2 decreased by 50%. The fluorescence components were positively correlated with water quality indexes such as COD, BOD5, TOC and UV254. After chlorination, the fluorescence characteristic peak of DOM was blue-shifted. The disinfection by-products (DBPs) detected in the effluent were mainly trichloromethane, dichloroacetic acid and trichloroacetic acid with concentrations of 16.3 μg/L, 19.0 μg/L and 23.8 μg/L, respectively, which should be concerned.
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