WANGZhi-hong,ZHIXu-jun,LIBing-xuan,et al.Potassium Permanganate Pre-oxidation Enhanced Coagulation Coupled with Ultrafiltration to Remove Co-existed Iron, Manganese and Algae in Lakes and Reservoirs in South China[J].China Water & Wastewater,2022,38(5):1-8.
Potassium Permanganate Pre-oxidation Enhanced Coagulation Coupled with Ultrafiltration to Remove Co-existed Iron, Manganese and Algae in Lakes and Reservoirs in South China
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第5期
Page:
1-8
Column:
Date of publication:
2022-03-01
- Keywords:
- potassium permanganate pre-oxidation; enhanced coagulation; ultrafiltration; algae; iron; manganese; membrane fouling
- Abstract:
- The distribution of co?existed iron, manganese and algae in South China has obvious regional characteristics under the hot?humid environment. Based on the water quality investigation of three typical algae-laden lakes in South China, the removal of iron, manganese and algae and membrane fouling characteristics have been specifically explored in the potassium permanganate pre-oxidation enhanced coagulation coupled with ultrafiltration process. The results showed that the removal effects of iron, manganese, algae, protein and polysaccharide were enhanced with the potassium permanganate dosage rising in the coupled process. Especially the removal rates of iron, manganese and algae reached 93.7%, 91.5% and 91.0%, respectively, with potassium permanganate dosage of 2.5 mg/L. In addition, the products of potassium permanganate pre-oxidation exhibited the coagulation?assisting effect on high algae?laden water and were identified as iron and manganese oxides based on SEM-EDS and XPS analysis. Finally, the stable effluent quality and alleviative membrane fouling also were confirmed by the short?term and long?term experiments on the actual lake and reservoir water.
Last Update:
2022-03-01