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Virus removal by an in-line coagulation–ceramic microfiltration process with high-basicity polyaluminum coagulation pretreatment

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Title: Virus removal by an in-line coagulation–ceramic microfiltration process with high-basicity polyaluminum coagulation pretreatment
Authors: Shirasaki, N. Browse this author →KAKEN DB
Matsushita, T. Browse this author
Matsui, Y. Browse this author
Urasaki, T. Browse this author
Kimura, M. Browse this author
Ohno, K. Browse this author
Keywords: aluminum hydrolyte species
ceramic microfiltration
colloid charge density
in-line coagulation
Issue Date: Jun-2014
Publisher: IWA Publishing
Journal Title: Water Science & Technology: Water Supply
Volume: 14
Issue: 3
Start Page: 429
End Page: 437
Publisher DOI: 10.2166/ws.2013.218
Abstract: The ability of in-line coagulation pretreatment with high-basicity polyaluminum chloride (PACl) coagulants to enhance virus removal by ceramic microfiltration (MF) was examined by comparing virus removal efficiencies from water pretreated with PACl-2.2 (basicity 2.2) and PACl-2.5 (basicity 2.5) versus alum, a synthetic aluminum chloride (AlCl3) solution, and two commercially available PACls, PACl-1.5 and PACl-1.8. The virus removal ratios for AlCl3, alum, PACl-1.5, and PACl-1.8 decreased markedly when the pH of the treated water shifted from 6.8 to 7.8, but was high at both pHs for PACl-2.2 and PACl-2.5. PACl-2.5 contains Al-13 species and possibly Al-30 species, and has a high colloid charge density. It removed viruses more efficiently than the other aluminum-based coagulants, not only at neutral pH, but also under weakly alkaline conditions. Moreover, the in-line coagulation-ceramic MF process with PACl-2.5 pretreatment removed not only viruses but also dissolved organic carbon and UV260-absorbing natural organic matter more efficiently and resulted in a lower residual aluminum concentration than did commercially available PACls, especially under weakly alkaline conditions. A combination of coagulation pretreatment with a high-basicity PACl and ceramic MF can provide effective treatment of drinking water over a broader pH range than is possible with commercially available aluminum-based coagulants.
Rights: ©IWA Publishing 2014. The definitive peer-reviewed and edited version of this article is published in Water Science & Technology: Water Supply volume 14 issue 3 429-437 2014 DOI:10.2166/ws.2013.218 and is available at
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 白崎 伸隆

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