Disinfection Efficiency of Filtered Water from Hanjiang River by Different Disinfection Processes
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
11
Page:
39-45
Column:
Date of publication:
2020-06-05
- Keywords:
- font-size: 10pt; ">filtered water from Hanjiang River; sodium hypochlorite; ozone; ultraviolet rays; combination disinfection; organic disinfection by- font-size: 10pt; ">products
- Abstract:
-
Hanjiang River is a drinking water source of Chaoshan area, and its water quality is directly related to the water safety of millions of households. The filtered water from a waterworks in Shantou was taken as the raw water. The germicidal efficacy, UV 254 removal efficiency and organic disinfection by-products formation during six disinfection processes sodium hypochlorite disinfection (NaClO), ozone disinfection (O3), ultraviolet disinfection (UV), simultaneous sodium hypochlorite and ultraviolet disinfection (NaClO/UV), simultaneous ozone and ultraviolet disinfection (O3/UV), and disinfection by ozone followed by sodium hypochlorite (O3+NaClO)］were investigated. Finally, the best disinfection process was explored, and the optimal disinfection process was selected. The six disinfection processes had good germicidal efficacy on bacteria in raw water. The removal efficiency of UV254 by the combined process of O3+NaClO was the highest, which reached 48.4%. The total amount of disinfection by-products produced by the six disinfection processes all met the requirements of Standards for Drinking Water Quality(GB 5749-2006), and the formation risk of organic disinfection by-products in effluent of O3+NaClO combined process was the lowest.
Last Update:
2020-06-01