ZHIXu-jun,CHENXing-xiang,ZHANGHui-huan.High Algae Pollution in Zhaoqing Section of Xijiang River Basin and Algae Removal Measures of a Waterworks[J].China Water & Wastewater,2025,41(4):92-97.
High Algae Pollution in Zhaoqing Section of Xijiang River Basin and Algae Removal Measures of a Waterworks
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第4期
Page:
92-97
Column:
Date of publication:
2025-02-17
- Abstract:
- In recent years, the algal bloom pollution in the Zhaoqing section of Xijiang River basin has shown an increasingly significant trend, especially during the high algal bloom period in 2023, which has caused varying degrees of impact on waterworks along the line. Based on a survey on the high algae pollution in the region, the measures such as potassium permanganate pre-oxidation, PAM enhanced coagulation, and carbon dioxide pH regulation were taken to remove algae, and jar test and process optimization were conducted in a waterworks. The results indicate that the impact of high algae pollution on waterworks is mainly reflected in the increase of raw water pH, shortened backwash cycle of filters, and increased consumption of coagulants. According to the jar test analysis, during the period of high algae pollution, the dosage of potassium permanganate composite salt, polyaluminum chloride, and PAM in the waterworks should be controlled at 0.1 kg/103 m3,15 kg/103 m3,and 0.1 kg/103 m3, respectively. After process optimization of the waterworks, all effluent quality indicators are normal, the consumption of polyaluminum chloride is relatively reduced, and the backwash cycles of both filters are extended.
Last Update:
2025-02-17