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Effects of super-powdered activated carbon pretreatment on coagulation and trans-membrane pressure buildup during microfiltration
| Title: | Effects of super-powdered activated carbon pretreatment on coagulation and trans-membrane pressure buildup during microfiltration |
| Authors: | Matsui, Yoshihiko Browse this author →KAKEN DB | | Hasegawa, Hiroki Browse this author | | Ohno, Koich Browse this author | | Matsushita, Taku Browse this author →KAKEN DB | | Mima, Satoru Browse this author | | Kawase, Yuji Browse this author | | Aizawa, Takako Browse this author |
| Keywords: | Membrane fouling | | Membrane permeability | | Powdered activated carbon | | Pretreatment | | Flocculation | | Floc |
| Issue Date: | Dec-2009 |
| Publisher: | Elsevier |
| Journal Title: | Water Research |
| Volume: | 43 |
| Issue: | 20 |
| Start Page: | 5160 |
| End Page: | 5170 |
| Publisher DOI: | 10.1016/j.watres.2009.08.021 |
| PMID: | 19751944 |
| Abstract: | As a pretreatment for membrane microfiltration (MF), the use of powdered activated carbon (PAC) with a particle size much smaller than that of conventional PAC (super-powdered PAC, or S-PAC) has been proposed to enhance the removal of dissolved substances. In this paper, another advantage of S-PAC as a pretreatment for MF is described: the use of S-PAC attenuates transmembrane pressure increases during the filtration operation. The floc particles that formed during coagulation preceded by S-PAC pretreatment were larger and more porous than the floc particles formed during coagulation preceded by PAC pretreatment and those formed during coagulation without pretreatment. This result was due to increased particle-particle collision frequency and better removal of natural organic matter, which inhibits coagulation by consuming coagulant, before the coagulation reaction. The caked fouling layer that built up on the membrane surface was thus more permeable with S-PAC than with normal PAC. Both physically reversible and irreversible membrane foulings were reduced, and more stable filtration was accomplished with S-PAC pretreatment. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/42721 |
| 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: 松井 佳彦
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