Precoating membranes with submicron super-fine powdered activated carbon after coagulation prevents transmembrane pressure rise: Straining and high adsorption capacity effects

Yuanjun, Zhao; Ryosuke, Kitajima; Nobutaka, Shirasaki; Matsui, Yoshihiko; Matsushita, Taku

Precoating membranes with submicron super-fine powdered activated carbon after coagulation prevents transmembrane pressure rise: Straining and high adsorption capacity effects

Yuanjun, Zhao; Ryosuke, Kitajima; Nobutaka, Shirasaki et al.

Water Research, 2020, 177, 115757

Permalink : https://hdl.handle.net/2115/85663

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アクセス権	open access
URI	https://hdl.handle.net/2115/85663
タイトル	Precoating membranes with submicron super-fine powdered activated carbon after coagulation prevents transmembrane pressure rise: Straining and high adsorption capacity effects
著者	Yuanjun, Zhao ; Ryosuke, Kitajima ; Nobutaka, Shirasaki ; Matsui, Yoshihiko ; Matsushita, Taku
著者名 Yuanjun, Zhao
著者名 Ryosuke, Kitajima
著者名 Nobutaka, Shirasaki
e-Rad_Researcher 00173790 著者名 Matsui, Yoshihiko
e-Rad_Researcher 30283401 著者名 Matsushita, Taku
言語	英語
キーワード	SSPAC
	SPAC
	Membrane fouling
	TMP
	Filtration
発行日	2020-06
出版者	Elsevier
収録物名	Water Research
巻(号)	177
ページ	115757
抄録	Commercially available powdered activated carbon (PAC) with a median diameter of 12–42 μm was ground into 1 μm sized superfine PAC (SPAC) and 200 nm sized submicron SPAC (SSPAC) and investigated as a pretreatment material for the prevention of hydraulically irreversible membrane fouling during a submerged microfiltration (MF) process. Compared with PAC and SPAC, SSPAC has a high capacity for selective biopolymer adsorption, which is a characteristic found in natural organic matter and is commonly considered to be a major contributor to membrane fouling. Precoating the membrane surface with SSPAC during batch filtration further removes the biopolymers by straining them out. In lab-scale membrane filtration experiments, an increase in the transmembrane pressure (TMP) was almost completely prevented through a precoating with SSPAC based on its pulse dose after coagulation pretreatment. The precoated SSPAC formed a dense layer on the membrane preventing biopolymers from attaching to the membrane. Coagulation pretreatment enabled the precoated activated carbon to be rinsed off during hydraulic backwashing. The functionality of the membrane was thereby retained for a long-term operation. Precoating the membranes with SSPAC after coagulation is a promising way to control membrane fouling, and efficiently prevents an increase in the TMP because of the straining effect of the SSPAC and the high capacity of the SSPAC to adsorb any existing biopolymers.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	©2020 Elsevier Ltd. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) https://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0043-1354
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.watres.2020.115757