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Biofouling Mitigation by Chloramination during Forward Osmosis Filtration of Wastewater


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タイトル: Biofouling Mitigation by Chloramination during Forward Osmosis Filtration of Wastewater
著者: Fujioka, Takahiro / Nguyen, Kha / Hoang, Anh / Ueyama, Tetsuro / Yasui, Hidenari / Terashima, Mitsuharu / Nghiem, Long
発行日: 2018年 9月27日
出版者: MDPI AG
引用: International Journal of Environmental Research and Public Health, 15(10), art.no.2124; 2018
抄録: Pre-concentration is essential for energy and resource recovery from municipal wastewater. The potential of forward osmosis (FO) membranes to pre-concentrate wastewater for subsequent biogas production has been demonstrated, although biofouling has also emerged as a prominent challenge. This study, using a cellulose triacetate FO membrane, shows that chloramination of wastewater in the feed solution at 3–8 mg/L residual monochloramine significantly reduces membrane biofouling. During a 96-h pre-concentration, flux in the chloraminated FO system decreased by only 6% and this flux decline is mostly attributed to the increase in salinity (or osmotic pressure) of the feed due to pre-concentration. In contrast, flux in the non-chloraminated FO system dropped by 35% under the same experimental conditions. When the feed was chloraminated, the number of bacterial particles deposited on the membrane surface was significantly lower compared to a non-chloraminated wastewater feed. This study demonstrated, for the first time, the potential of chloramination to inhibit bacteria growth and consequently biofouling during pre-concentration of wastewater using a FO membrane.
キーワード: Chloramine / Forward osmosis / Membrane fouling / Pre-concentration / Wastewater treatment
URI: http://hdl.handle.net/10069/38676
ISSN: 16617827
DOI: 10.3390/ijerph15102124
権利: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
資料タイプ: Journal Article
原稿種類: publisher
出現コレクション:060 学術雑誌論文

引用URI : http://hdl.handle.net/10069/38676

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