The formation and control of ozonation by-products during drinking water advanced treatment in a pilot-scale study

文献类型： 外文期刊

第一作者： Wang, Yongjing

作者： Wang, Yongjing;Wang, Songtao;Yan, Xinyu;Zhang, Minglu;Ren, Lianhai;Yu, Jianwei;Li, Jinglin;Li, Cheng;Yu, Jianwei

作者机构：

关键词： Ozone-biological activated carbon (O-4-BAC); Drinking water; Animate; Aldehydes; Hydrogen peroxide (H2O2)

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）

ISSN： 0048-9697

年卷期： 2022 年 808 卷

页码：

收录情况： SCI

摘要： Ozone has been widely applied during drinldng water treatment for organic pollutants removal, however, the ozonation by-products such as bromate, aldehydes, and carboxylic acids could be produced. To investigate the ozonation byproducts formation and control efficiency, a continuous pilot-scale system was established including conventional treatment and ozone-biological activated carbon (O-3-BAC) treatment processes in a waterworks that receives bromide-bearing source water from the Yellow River in northern China. It was found that ozonation could reduce the threshold odour number and the haloacetic acids formation potential effectively. As 1.8-2.6 mg/L of ozone was applied, the bromate concentration would exceed the standard of 10 mu g/L. Simultaneously, ozonation led to a large number of formaldehyde, methylglyoxal and other aldehydes. At the ozone dosage of 3.0 mg/L, the total concentration of aldehydes reached the highest of 45.4 mu g/L. Ammonia and hydrogen peroxide (H2O2) addition could inhibit the formation of bromate effectively. The application of H2O2 induced an increase in aldehydes concentration reaching a maximum concentration of 57.6 mu g/L. During the BAC treatment, the removal rate of aldehydes would reach 19%-41%. The addition of H2O2 inhibited the formation of bromate but increased the production of aldehydes, thus it is important to search a balance point for controlling bromate and aldehydes simultaneously. The H2O2/O-3 (g/g) of 1.0 could be possible to control both bromate and aldehydes concentrations within the standards.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序