WANGJun-qi,LIWei,XINHui-yu,et al.Screening and Application of Indicators for the Formation Potential of Disinfection Byproducts in Conventional Water Purification Processes[J].China Water & Wastewater,2022,38(15):7-13.
常规净水工艺中DBPFP的指示指标筛选及应用
- Title:
- Screening and Application of Indicators for the Formation Potential of Disinfection Byproducts in Conventional Water Purification Processes
- Keywords:
- coagulation; disinfection byproducts formation potential; indicator; linear relationship; parallel factor analysis
- 摘要:
- 因消毒副产物种类繁多且检测复杂，致使其在常规饮用水处理过程中无法被快速监测。为获取适宜的有机物指标以表征消毒副产物生成势（DBPFP），选取金盆水库原水作为研究对象，利用混凝剂硫酸铝模拟混凝—沉淀—过滤—氯消毒的常规净水过程，测定并建立了多种有机物指标（UV254、DOC、SUVA 和EEMs-PARAFAC组分最大荧光强度）与DBPFP之间的关系。结果表明，随着混凝剂投量的增加，溶解性有机物及DBPFP的去除率均呈现出先升高后基本保持不变的趋势；与其他指标相比，UV254 与目标DBPFP（THMs、HAAs、HANs 和1，1，1-TCP）具有更好的相关性（r2 > 0.93），且测定简单，适宜作为DBPFP的指示参数。为验证该指标的广适性，将其应用于4种不同水质的原水，均取得了类似结果。以上结果证实UV254可较好地指示DBPFP，在常规净水工艺中可依据其变化优化工艺条件来控制DBPs的生成量。
- Abstract:
- During conventional drinking water treatment process, concentrations of disinfection byproducts (DBPs) cannot be rapidly detected due to their various types and complex detection protocols. In order to obtain suitable organic matter indicators of DBPs formation potential (DBPFP), a surface water collected from Jinpen Reservoir was employed as raw water, and the coagulant aluminum sulfate was used to simulate the conventional water treatment process which consists of coagulation/flocculation, sedimentation, filtration and chlorine disinfection. The relationships between DBPFP and various organic indexes (UV254, DOC, SUVA and the maximum fluorescence intensity of EEMs-PARAFAC components) were established. The results showed that, with the increase of coagulant dosage the removal efficiencies of dissolved organic matter and DBPFP were firstly increased and then remained unchanged. Compared to other indicators, UV254 and target DBPFP (THMs, HAAs, HANs and 1,1,1-TCP) had a better correlation (r2 > 0.93) and was simple to determine, which was suitable for DBPFP indicator parameter. In order to verify the broad applicability of this indicator, it was applied to four kinds of raw water with different water quality, and similar results were obtained. The results suggest that UV254 can indicate DBPFP well, and the production of DBPs can be controlled by optimizing the operational conditions according to its variation in conventional water treatment process.
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