ZHOU Li-jiao,ZHANG Yi-ran,WEI Zhen-yan,et al.Productive Test of Trihalomethanes Control by Different Preoxidation Disinfection Processes[J].China Water & Wastewater,2021,37(13 13):65-69.
Productive Test of Trihalomethanes Control by Different Preoxidation Disinfection Processes
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
13 13
Page:
65-69
Column:
Date of publication:
2021-07-01
- Keywords:
- preoxidation; trihalomethanes(THMs); disinfection; UV
- Abstract:
- A productive test was carried out in a water treatment plant in Tianjin, in which raw water with high temperature and high algae concentration was treated by three preoxidation disinfection processes, namely preozonation/UV and single-point chlorine, preozonation/UV and two-points chlorine and prechlorination/UV and two-points chlorine. Production of trihalomethanes (THMs), residual chlorine and turbidity in filtered water, effluent and pipe network water under three different treatment conditions were investigated and analyzed. The optimal preoxidation disinfection process to obtain minimum THMs in the effluent and pipe network water was preozonation/UV and two-points chlorine disinfection process. The process was advised to be applied between July and September each year, while preozonation/UV and single-point chlorine disinfection process could be applied in the periods except July to September. When prechlorination must be applied between July and September in an emergency situation, the two-point chlorination process must be adopted.
Last Update:
2021-07-01