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KMID : 1094720080130030360
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Biotechnology and Bioprocess Engineering
2008 Volume.13 No. 3 p.360 ~ p.365
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Toluene degradation in a polyurethane biofilter at high loading
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Ryu Hee-Wook
Kim So-Jong
Cho Kyung-Suk
Lee Tae-Ho
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Abstract
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In the present study, toluene elimination in the polyurethane (PU) biofilter during long-term (145 day) operation was characterized, and assessed the effects of changing the inlet loading and space velocity (SV). A very high elimination capacity of 3.7 kg·m?3·h?1 was obtained at an inlet loading of 4.0 kg·m?3·h?1 (inlet toluene concentration of 900 ppmv at a SV of 1,040 h?1). Backwashing with irrigation and compressed air allowed maintenance of a pressure drop of < 80 mm H2O·m?1-filter at an SV of 830 h?1 and an elimination efficiency of > 90% during the 145 day of operation. In conclusion, the PU biofilter can overcome the problems of clogging caused by excess biomass growth and of low treatment capacities of conventional biofilters.
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KEYWORD
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toluene, polyurethane, biofilter, high loading, Stenotrophomonas maltophila, clogging
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