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Moderate KMnO4-Fe(II) pre-oxidation for alleviating ultrafiltration membrane fouling by algae during drinking water treatment
Ma, Baiwen; Qi, Jing; Wang, Xing; Ma, Min; Miao, Shiyu; Li, Wenjiang; Liu, Ruiping; Liu, Huijuan; Qu, Jiuhui
2018-10-01
Source PublicationWATER RESEARCH
ISSN0043-1354
Volume142Pages:96-104
AbstractAlthough ultrafiltration (UF) membranes are highly beneficial for removing algae, the removal process causes serious UF membrane fouling. To avoid the unfavorable effects of algal cells that have been damaged by oxidants, our previous study reported a novel, moderate pre-oxidation method (KMnO4-Fe(II) process) that aimed to achieve a balance between the release of intracellular organic matter and enhanced algae removal. This study further investigated the performance of a UF membrane with KMnO4-Fe(II) pretreatment in the presence of algae-laden reservoir water after a long running time. We found that algae could be completely removed, membrane fouling was significantly alleviated, and the overall performance was much better than that of Fe(III) coagulation alone. The transmembrane pressure (TMP) during Fe(III) coagulation increased to 42.8 kPa, however, that of the KMnO4-Fe(II) process only increased to 25.1 kPa for after running for 90 d. The slower transmembrane pressure was attributed to the larger floc size, higher surface activity, and inactivation of algae. Although there was little effect on microorganism development, lower microorganism abundance (20.7%) was observed during the KMnO4-Fe(II) process than during coagulation alone (44.9%) due to the release of extracellular polymeric substances. We also found that the floc cake layer was easily removed by washing, and many of the original membrane pores were clearly observed. Further analysis demonstrated that the effluent quality was excellent, especially its turbidity, chromaticity, and Mn and Fe concentrations. Based on the outstanding UF membrane performance, it may be concluded that the KMnO4-Fe(II) process exhibits considerable potential for application in the treatment of algae-laden water. (C) 2018 Published by Elsevier Ltd.
Department中国科学院饮用水科学与技术重点实验室
KeywordUltrafiltration membrane Algae-laden reservoir water Moderate KMnO4-Fe(II) pre-oxidation Fouling alleviation
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/41385
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Ma, Baiwen,Qi, Jing,Wang, Xing,et al. Moderate KMnO4-Fe(II) pre-oxidation for alleviating ultrafiltration membrane fouling by algae during drinking water treatment[J]. WATER RESEARCH,2018,142:96-104.
APA Ma, Baiwen.,Qi, Jing.,Wang, Xing.,Ma, Min.,Miao, Shiyu.,...&Qu, Jiuhui.(2018).Moderate KMnO4-Fe(II) pre-oxidation for alleviating ultrafiltration membrane fouling by algae during drinking water treatment.WATER RESEARCH,142,96-104.
MLA Ma, Baiwen,et al."Moderate KMnO4-Fe(II) pre-oxidation for alleviating ultrafiltration membrane fouling by algae during drinking water treatment".WATER RESEARCH 142(2018):96-104.
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