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Virus removal by an in-line coagulation–ceramic microfiltration process with high-basicity polyaluminum coagulation pretreatment
| 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 | | bacteriophage | | 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 www.iwapublishing.com. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/59426 |
| 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)
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Submitter: 白崎 伸隆
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