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6CCVD Research

Effect of Electrochemical Pre-Oxidation for Mitigating Ultrafiltration Membrane Fouling Caused by Extracellular Organic Matter

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2023-06-14
JournalWater
AuthorsShunkai Xu, Guangchao Li, Shiqing Zhou, Zhou Shi, Bin Liu
InstitutionsBeijing Municipal Engineering Design and Research Institute (China), Hunan University
Citations3

Abstract

Section titled ā€œAbstractā€

Algal extracellular organic matter (EOM) will cause grievous membrane fouling during the filtration of algae-laden water; hence, boron-doped diamond (BDD) anodizing was selected as the pretreatment process before the ultrafiltration, and the EOM fouling mitigation mechanism and the purification efficiency were systematically investigated. The results showed that BDD oxidation could significantly alleviate the decline of membrane flux and reduce membrane fouling, and the effect was more notable with an increase in oxidation time. Less than 10% flux loss happened when oxidation duration was 100 min. The dominant fouling model was gradually replaced by standard blocking. BDD anodizing preferentially oxidizes hydrophobic organic matter and significantly reduces the DOC concentration in EOM. The effluent DOC was reduced to less than 1 mg/L when 100 min of BDD anodizing was applied. After the pre-oxidation of BDD, the zeta potential and interfacial free energy, including the cohesive and adhesive free energy, were all constantly increasing, which implied that the pollutants would agglomerate and deposit, and the repulsion between foulants and the ultrafiltration membrane was augmented with the extensive oxidation time. This further confirms the control of BDD on membrane fouling. In addition, the BDD anodizing coupled ultrafiltration process also showed excellent performance in removing disinfection by-product precursors.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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  3. 2021 - UF fouling behavior of allelopathy of extracellular organic matter produced by mixed algae co-cultures [Crossref]
  4. 2012 - A mini-review on membrane fouling [Crossref]
  5. 2015 - Seawater reverse osmosis desalination and (harmful) algal blooms [Crossref]
  6. 2008 - Characterisation of algogenic organic matter extracted from cyanobacteria, green algae and diatoms [Crossref]
  7. 2012 - Ultrafiltration membrane fouling by extracellular organic matters (EOM) of Microcystis aeruginosa in stationary phase: Influences of interfacial characteristics of foulants and fouling mechanisms [Crossref]
  8. 2010 - Microfiltration membrane fouling and cake behavior during algal filtration [Crossref]
  9. 2004 - Characterizing algogenic organic matter (AOM) and evaluating associated NF membrane fouling [Crossref]
  10. 2009 - Pretreatment for Low Pressure Membranes in Water Treatment: A Review [Crossref]

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