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The Removal of Styrene using Immobilized Microorganisms in Hydrogel Beads  

Song, Ji-Hyeon (Civil and Environmental Engineering, Sejong University)
Ham, Eun-Yi (Civil and Environmental Engineering, Sejong University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.6, 2006 , pp. 648-653 More about this Journal
Abstract
As an alternative for the traditional materials packed in biofilters treating gaseous VOCs, a novel packing material has been developed and tested. In the packing material(named as Hydrogel Bead, HB), pollutant-degrading microorganisms were immobilized in hydrogel consisted of alginate, polyvinyl alcohol(PVA), and powdered activated carbon. A closed-bottle study showed that the HB rapidly removed gaseous styrene without the losses of adsorption and biodegradation capacity. Biofilter column experiments using the HBs also demonstrated that greater than 95% of removal efficiencies were found at an inlet styrene loading rate of $245g/m^3/hr$, which was higher biofilter performance than other elimination capacity reported earlier. Furthermore, when the inlet styrene concentration increased stepwise, the adsorption played an important role in overall styrene removals. The absorbed styrene was found to be biodegraded in the following low inlet loading condition. Consequently, the new HB material is able to successfully minimize the drawbacks of activated carbon(necessity of regeneration) and biological processes(low removal capacity at dynamic loading conditions), and maximize the overall performance of biofilter systems treating VOCs.
Keywords
Hydrogel; Alginate; PVA; Volatile Organic Compounds; Biofilter;
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