Hydrodynamics and microbial physiology affecting performance of a new MBR, membrane-coupled high-performance compact reactor

In this study, hydrodynamics and physiology of microorganisms were investigated in a new type membrane bioreactor, MHCR, which is a membrane coupled HCR (High performance Compact Reactor) having very high COD removal efficiency. The degree of interference caused by inserting a submerged membrane was...

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Bibliographic Details
Published in:Desalination 2005-02, Vol.172 (2), p.181-188
Main Authors: Park, Jong-Sang, Yeon, Kyung-Min, Lee, Chung-Hak
Format: Article
Language:English
Subjects:
Air suction rate
Applied sciences
Biological and medical sciences
Biotechnology
Chemical engineering
Colloidal COD
EPS
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
HCR
Hydrodynamics of contact apparatus
Methods. Procedures. Technologies
Others
Oxygen transfer coefficient
Pollution
Reactors
Submerged membrane
Various methods and equipments
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Summary:In this study, hydrodynamics and physiology of microorganisms were investigated in a new type membrane bioreactor, MHCR, which is a membrane coupled HCR (High performance Compact Reactor) having very high COD removal efficiency. The degree of interference caused by inserting a submerged membrane was evaluated quantitatively by measuring the air suction rate and overall oxygen transfer coefficient ( k L,a ). Despite such interference, MHCR showed greater oxygen transfer efficiency than HCR under particular hydrodynamic conditions. Higher recirculation rate generally resulted in a higher turbulence and thus alleviated membrane fouling. When the recirculation rate was too high however, the microbial flocs were broken by fluid shear and membrane permeability was decreased rapidly. All these results were elucidated through not only physicochemical but also microbiological factors.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2004.07.035