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Indexed by:期刊论文

Date of Publication:2013-02-15

Journal:JOURNAL OF MEMBRANE SCIENCE

Included Journals:SCIE、EI

Volume:429

Page Number:252-258

ISSN No.:0376-7388

Key Words:Membrane fouling; Membrane bioreactor; Conductive membrane; Polypyrrole; Electric field

Abstract:For increasing separation efficiency and reducing energy consumption, study about membrane fouling reduction has ever been a hot topic. To prepare fouling-resistant, hydrophilic and conductive membrane, polyester filter cloth was modified with polypyrrole (PPy) in-situ formed by polymerization of pyrrole (concentration 3.868 g/L) and sodium dodecyl benzene sulfonate (SDBS). Increase in SDBS concentration (0.5, 1 or 2 g/L) during polymerization increased the membrane electric conductivity and hydrophilicity, and enhanced the permeate flux and anti-fouling properties of modified membrane. A voltage drop at 0.2 or 0.4 V/cm exhibited better fouling reduction than 0 V/cm. In the long-term filtration tests with the PPy (2 g/L SDBS) modified membrane, both the irreversible and the total resistances were decreased (5 times and 2 times, respectively) by applying 0.2 V/cm electric field, indicating the effect of applied electric field towards fouling reduction. The membrane cathode successfully prevented the pore clogging. (C) 2012 Elsevier B.Y. All rights reserved.