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.
Dissolved Organic Matter Conversion and Disinfection By-products Formation Characteristics in Wastewater Treatment Plant Based on Spectral Analysis
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第5期
Page:
53-59
Column:
Date of publication:
2023-03-01
- Keywords:
- wastewater treatment plant; dissolved organic matter; fluorescence regional integration; parallel factor analysis; disinfection by-products
- 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.
Last Update:
2023-03-01