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KMID : 1094720100150030512
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Biotechnology and Bioprocess Engineering
2010 Volume.15 No. 3 p.512 ~ p.519
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Biodegradation of Gas-phase Styrene in a High-performance Biotrickling Filter using Porous Polyurethane Foam as a Packing Medium
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Moon Cheul-Hyun
Park Sung-Hoon
Lee Eun-Yeol
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Abstract
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A biotrickling filter (BTF) packed with porous polyurethane (PU) foam sheets was developed and operated for removal of gas-phase styrene. The specific surface area and void fraction of the PU foam sheet were determined to be 497 m2/m3 and 0.92, respectively, by using mathematical modeling and experimental measurement. The effects of gas flow direction (co-current and counter-current), styrene loading rate and empty bed residence time on the efficiency of the BTF were analyzed. The BTF achieved a high elimination capacity of 4.0 ~ 5.0 kg styrene/m3day due to the high specific surface area of the PU foam. The BTF could be operated repeatedly when excessively-grown biomass was periodically removed, using circulating NaOH solution for 2 h every four days.
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KEYWORD
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biomass removal, biotrickling filter, elimination capacity, styrene, VOC
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