ZhouZhengxie,LiuZhigang,WeiHeng,et al.Effectiveness of Pre-treatment O3/H2O2 Advanced Oxidation Process in Response to Water Quality Variations during Typhoon Events[J].China Water & Wastewater,2026,42(13):42-48.
Effectiveness of Pre-treatment O3/H2O2 Advanced Oxidation Process in Response to Water Quality Variations during Typhoon Events
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第13期
Page:
42-48
Column:
Date of publication:
2026-07-01
- Keywords:
- pre-ozone/hydrogen peroxide (O3/H2O2) advanced oxidation; typhoon; turbidity; three-dimensional fluorescence spectroscopy; molecular weight distribution
- Abstract:
- This study focused on the J water plant in Ningbo, analyzing the characteristics of raw water quality fluctuations during typhoon Zhujiecao in 2025. The treatment efficiency and mechanism of the pre-ozone/hydrogen peroxide (O3/H2O2) advanced oxidation process during this period were investigated. The results showed that the typhoon caused a sharp increase in raw water turbidity to 280 NTU, with a peak permanganate index of 4.20 mg/L. On the day of the typhoon, the number-average molecular weight of organic matter increased from 800 u (pre-typhoon) to 1 145 u, exhibiting a complex pollution profile characterized by high turbidity, high organic matter concentration, and high molecular weight. After the O3/H2O2 process was activated, the fluorescence volume integral of the effluent was reduced by 26.8%, and the number-average molecular weight decreased by 26.2%, accompanied by an increase in the proportion of small-molecule fractions. Through the synergistic effect of oxidation and coagulation, the effluent turbidity from the sedimentation tank was controlled below 1 NTU. The overall dissolved organic matter (DOM) removal rate increased from 36.3% in the conventional process to 82.0% in the full process. The process efficacy was attributed to the direct degradation of organic matter by ozone and hydroxyl radicals (·OH), as well as the complexation and adsorption of oxygen-containing functional groups generates by oxidation onto the surface of inorganic particles. This dual effect of direct removal + synergistic separation provides technical reference and operational guidance for similar water treatment plants dealing with water quality variations in reservoir raw water caused by typhoons.
Last Update:
2026-07-01