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http://dx.doi.org/10.4491/eer.2005.10.4.191

MATHEMATICAL MODEL OF SULFUR UTILIZING AUTOTROPHIC DENITRIFICATION IN AN UP-FLOW PACKED-BED REACTOR BASED ON BIOMASS DISTRIBUTION  

Park, Woo-Shin (Bio-Environmental Engineering Laboratory, Dept. of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST))
Ahn, Yoeng-Hee (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Jung, Kyung-Ja (Bio-Environmental Engineering Laboratory, Dept. of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST))
Tatavarty, Rameshwar (Bio-Environmental Engineering Laboratory, Dept. of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST))
Kim, In-S. (Bio-Environmental Engineering Laboratory, Dept. of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST))
Publication Information
Environmental Engineering Research / v.10, no.4, 2005 , pp. 191-198 More about this Journal
Abstract
A novel technology for the removal of nitrogen from wastewater, an autotrophic denitrification process with sulfur particles, has been developed. A respirometer was employed to monitor the nitrogen gas produced in the reactor, while 4',6-diamidino-2-phenylindole staining was employed to investigate the biomass distribution in terms of cell number according to the reactor height. From the respirometric monitoring, the denitrification reaction was defined as a first order reaction. The reactor was divided into 7 sections and biomass was analyzed in each section where cell number was ranged from $4.8\;{\times}\;10^6\;to\;8.7\;{\times}\;10^7$ cells/g dry weight of sulfur. Cells placed mostly in the lower layer ( < 10 cm of height). A function for biomass distribution was obtained with non-linear regression. Then a mathematical model has been developed by combining a plug-flow model with the biomass distribution function. The model could make a vertical profile of the up-flow packed-bed reactor resulting in a reasonable comparison with measured nitrate concentration with 5% of error range.
Keywords
Sulfur; denitrification; packed-bed; up-flow; biomass distribution; mathematical model;
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