LIUZhi-gang,XUQiao,ZHOUZheng-xie,et al.Water Quality Chemical Stability of Water Supply System and Its Control Strategy[J].China Water & Wastewater,2022,38(21):45-50.
Water Quality Chemical Stability of Water Supply System and Its Control Strategy
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第21期
Page:
45-50
Column:
Date of publication:
2022-11-01
- Abstract:
- According to the effect of different water treatment processes on the chemical stability of water quality in water purification plants, the variation law of water quality chemical stability along the process of water purification was investigated, and the corresponding control strategies were proposed. The coagulation and precipitation process significantly reduced the chemical stability of water quality and enhanced the corrosion tendency. The ultrafiltration and sand filtration process had little influence on the chemical stability of water quality, and the use of sodium hypochlorite for disinfection slightly improved the chemical stability of water quality. When the dosage of coagulant polyaluminum chloride (PAC) was 2 mg/L, the best turbidity removal performance and water quality chemical stability were achieved. When the dosage of alkali agent Ca(OH)2 was 4 mg/L, the chemical stability of water quality could be basically achieved. According to practical engineering case, the water quality risk caused by water source switching was effectively reduced and the water quality stability of the pipe network was ensured through the measures such as water supply dispatch management in the service area, pipe network flushing and discharge, and old pipe network reconstruction.
Last Update:
2022-11-01