Minute electric field reduced membrane fouling and improved performance of membrane bioreactor

Abstract Effective application of a low voltage and low intensity electric field in EMBR (a membrane bioreactor attached with electric field) may reduce fouling, energy consumption, while enhance treatment efficiency. For that, electrodes and membrane modules were re-arranged in EMBR to maintain constant electrophoresis forces against deposition/adsorption of extra-cellular polymeric substances (EPS) or sludge particles on the membrane. The copper wire cathode inside a flat membrane module and stainless steel mesh anode outside the module were effectively used in fouling reduction in treating simulate municipal wastewater. The applied electric field significantly enhanced the permeate flux of polypropylene (PP) non-woven (0.036 V/cm, extended the operating cycle 7 days) or polyester membrane (0.073 V/cm, 1.2 times), reduced sludge EPS production and membrane fouling, extended the filtration cycle and enhanced sludge activity. The irreversible membrane fouling was effectively reduced.

[1]  R. Wakeman,et al.  Electric field enhanced crossflow microfiltration of hydrophobically modified water soluble polymers , 1997 .

[2]  Changzhu Yang,et al.  Study of the influence of the electric field on membrane flux of a new type of membrane bioreactor , 2007 .

[3]  Zhiwei Wang,et al.  Effective control of membrane fouling by filamentous bacteria in a submerged membrane bioreactor , 2010 .

[4]  D. R. Bond,et al.  Shewanella secretes flavins that mediate extracellular electron transfer , 2008, Proceedings of the National Academy of Sciences.

[5]  Maria Elektorowicz,et al.  Development of a novel Submerged Membrane Electro-Bioreactor (SMEBR): performance for fouling reduction. , 2010, Environmental science & technology.

[6]  F. Meng,et al.  Effect of filamentous bacteria on membrane fouling in submerged membrane bioreactor , 2006 .

[7]  J. C. Thrash,et al.  Review: Direct and indirect electrical stimulation of microbial metabolism. , 2008, Environmental science & technology.

[8]  H. Saiki,et al.  Electrochemical Regeneration of Fe(III) To Support Growth on Anaerobic Iron Respiration , 2002, Applied and Environmental Microbiology.

[9]  S. Nadh Jagannadh and,et al.  Electrokinetics Methods To Control Membrane Fouling , 1996 .

[10]  Robert C. Andrews,et al.  Evaluation of an MBR-RO system to produce high quality reuse water: microbial control, DBP formation and nitrate. , 2005, Water research.

[11]  Takashi Sugawara,et al.  Development of a novel fouling suppression system in membrane bioreactors using an intermittent electric field. , 2010, Water research.

[12]  A. E. Greenberg,et al.  Standard Methods for the Examination of Water and Wastewater seventh edition , 2013 .

[13]  J. C. Thrash,et al.  Electrochemical stimulation of microbial perchlorate reduction. , 2007, Environmental science & technology.

[14]  B. Sarkar,et al.  Application of external electric field to enhance the permeate flux during micellar enhanced ultrafiltration , 2009 .

[15]  X. Y. Li,et al.  Influence of loosely bound extracellular polymeric substances (EPS) on the flocculation, sedimentation and dewaterability of activated sludge. , 2007, Water research.

[16]  B. Ngwenya,et al.  The effect of ionic strength on the electrophoretic mobility and protonation constants of an EPS-producing bacterial strain. , 2010, Journal of Colloid and Interface Science.

[17]  Fenglin Yang,et al.  Impact of filamentous bacteria on properties of activated sludge and membrane-fouling rate in a submerged MBR , 2008 .

[18]  T. B. Ghosh,et al.  A study of electric field enhanced ultrafiltration of synthetic fruit juice and optical quantification of gel deposition , 2008 .

[19]  Fenglin Yang,et al.  A new helical membrane module for increasing permeate flux , 2010 .

[20]  Fenglin Yang,et al.  Application of fractal permeation model to investigate membrane fouling in membrane bioreactor , 2005 .

[21]  Pierre Le-Clech,et al.  Fouling in membrane bioreactors used in wastewater treatment , 2006 .

[22]  Yun Shen,et al.  Influence of extracellular polymeric substances (EPS) on deposition kinetics of bacteria. , 2009, Environmental science & technology.

[23]  Simon Judd,et al.  Membrane Fouling in Membrane Bioreactors for Wastewater Treatment , 2002 .

[24]  Kazuo Yamamoto,et al.  Direct Solid-Liquid Separation Using Hollow Fiber Membrane in an Activated Sludge Aeration Tank , 1989 .