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Turnup Turndown of Membrane Operation of Membrane Bioreactors
Author(s) -
HOWELL J. A.,
ARNOT T. C.,
CHUA H. C.
Publication year - 2003
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2003.tb06022.x
Subject(s) - aeration , permeation , membrane fouling , membrane , flux (metallurgy) , fouling , membrane bioreactor , chemistry , bioreactor , environmental engineering , chromatography , chemical engineering , environmental science , engineering , biochemistry , organic chemistry
A bstract : Membrane bioreactors can be operated with intermittent permeation and continuous aeration. Aeration close to the surface of a submerged membrane helps to maintain a membrane surface that is free from fouling. The conditions under which this occurs depend on the interaction between flux and aeration rate. Increased flux is possible without severe fouling if the aeration rate is increased. Results of performing membrane operation under the dual intermittency of aeration rate and permeation rate, with permeation also interrupted on a regular cycle, are presented. The results show that membrane plants designed for optimal operation at moderate flux can survive effectively with higher flux operation for restricted periods. Designing to account for such effects could reduce overall plant costs.