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Environmental Engineering Research 2004;9(5): 238-247. DOI: https://doi.org/10.4491/eer.2004.9.5.238
THE KINETICS ON THE BIOLOGICAL REACTION IN MEMBRANE BIOREACTOR (MBR) WITH GRAVITATIONAL AND TRANSVERSAL FILTRATION
Nam J. Jang, Moon H. Hwang, Young H. Yeo, Wang G. Shim, S. Vigneswaran, and In S. Kim
1Department of Environmental Science and Engineering, Gwangju Institute of Science & Technology (GIST)
2Department of Chemical Technology, Chonnam National University (CNU)
3Environmental Engineering Group, University of Technology, Sydney (UTS)
Corresponding Author: In S. Kim ,Tel: +82-62-970-2436, Fax: +82-62-970-2434, Email: iskim@gist.ac.kr
Received: March 13, 2004;  Accepted: October 10, 2004.
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ABSTRACT
The objective of this study was to develop kinetic model for the MBR and investigate kinetic characteristics of the gravitational flow transverse direction MBR system. Kinetic model was derived by mass balance of substrate and biomass combined with empirical membrane filtration term for the MBR. To find kinetic values, permeate flux and COD removal were analyzed through the laboratory MBR operation as different solids retention times. Permeate flux was ranged 2.5-5.0 LMH (L/m7hr) as sludge characteristics in each run. Although the soluble COD in the bioreactor was changed, the effluent COD was stable as average 99% removal rate during the experimental periods. tK of this MBR system was higher than those of cross-flow MBR processes. The kinetics of this MBR showed that smaller k, larger b, and larger Ks values than the conventional activated sludge process. These results indicated that substrate was used for cell maintenance rather than growth in this MBR system.
Keywords: Membrane | Bioreactor | MBR | Biological Kinetics | Gravitational filtration
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