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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 3, 2004
Accepted December 20, 2004

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Treatment of Mixed Solvent Vapors with Hybrid System Composed of Biofilter and Photo-catalytic Reactor

Kwang-Hee Lim^† Sang-Won Park¹ Eun Ju Lee Soo-Hyeun Hong

Department of Chemical Engineering, Daegu University, Gyeongsan, Gyeongbuk 712-714, Korea ¹Department of Food Engineering, Daegu University, Gyeongsan, Gyeongbuk 712-714, Korea

khlim@daegu.ac.kr

Korean Journal of Chemical Engineering, January 2005, 22(1), 70-79(10), 10.1007/BF02701465

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Abstract

The transient behavior of a hybrid system composed of biofilter and photo-catalytic reactor was observed at the height of each sampling port to treat waste-air containing ethanol. The biofilter packed with mixed media (of granular activated carbon and compost) was inoculated with a pure culture of Burkholderia cepacia G4 and Pseudomonas putida, while a photo-catalytic reactor was composed of 15W UV-A lamps and annular pyrex tubes packed with glass beads coated with sol type of TiO2 before calcination. The maximum elimination capacities of toluene and ethanol turned out to be 130 g/m3/h and 230 g/m3/h, respectively, which were greater by 40 g/m3/h and 130 g/m3/h, respectively, than those from the experiments performed with a biofilter only. Thus, the maximum elimination capacities for toluene and ethanol increased by 44% and 130%, respectively, by use of a hybrid system. The photo-catalytic process contributed to the maximum elimination capacities of hybrid system on toluene and ethanol by 30.8% and 56.5%, respectively, which contributions for the elimination capacities on toluene and ethanol were allocated indirectly by 25.4% and 44.3% as well as directly by 5.4% and 12.2%, respectively. Direct contributions of photo-catalytic process were 17.5% and 21.5% to the increments of the elimination capacities on toluene and ethanol, respectively, while its indirect contributions were 82.5% and 78.5% to those on toluene and ethanol, respectively.

Keywords

Hybrid System Photo-catalytic Process Biofilter Toluene Ethanol Transient Behavior Removal Efficiency Elimination Capacity

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