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Water Reclamation Using a Ceramic Nanofiltration Membrane and Surface Flushing with Ozonated Water

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Title: Water Reclamation Using a Ceramic Nanofiltration Membrane and Surface Flushing with Ozonated Water
Authors: Fujioka, Takahiro / Hoang, Anh T. / Okuda, Tetsuji / Takeuchi, Haruka / Tanaka, Hiroaki / Nghiem, Long D.
Issue Date: 19-Apr-2018
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
Citation: International Journal of Environmental Research and Public Health, 15(4), 799; 2018
Abstract: A new membrane fouling control technique using ozonated water flushing was evaluated for direct nanofiltration (NF) of secondary wastewater effluent using a ceramic NF membrane. Experiments were conducted at a permeate flux of 44 L/m2h to evaluate the ozonated water flushing technique for fouling mitigation. Surface flushing with clean water did not effectively remove foulants from the NF membrane. In contrast, surface flushing with ozonated water (4 mg/L dissolved ozone) could effectively remove most foulants to restore the membrane permeability. This surface flushing technique using ozonated water was able to limit the progression of fouling to 35% in transmembrane pressure increase over five filtration cycles. Results from this study also heighten the need for further development of ceramic NF membrane to ensure adequate removal of pharmaceuticals and personal care products (PPCPs) for water recycling applications. The ceramic NF membrane used in this study showed approximately 40% TOC rejection, and the rejection of PPCPs was generally low and highly variable. It is expected that the fouling mitigation technique developed here is even more important for ceramic NF membranes with smaller pore size and thus better PPCP rejection.
Keywords: ceramic membrane / membrane fouling / nanofiltration / ozone / water recycling
URI: http://hdl.handle.net/10069/38228
ISSN: 16617827
DOI: 10.3390/ijerph15040799
Rights: © 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/).
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/38228

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