Solid-liquid two-phase partitioning bioreactors for the treatment of gas-phase volatile organic carbons (VOCs) by a microbial consortium |
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Authors: | Andrew J Daugulis Neal G Boudreau |
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Institution: | Department of Chemical Engineering, Queen's University, Kingston, ON, Canada, K7L 3N6, daugulis@chee.queensu.ca. |
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Abstract: | A two-phase partitioning bioreactor (TPPB), employing styrene-butadiene co-polymer beads as the sequestering/delivery phase, was used to treat high step change loadings of toluene in a contaminated air stream. The polymers, which are biocompatible and non-bioavailable, allowed the use of a microbial consortium and effectively absorbed and released the toluene vapours for biodegradation, while providing a buffering effect against high toluene transients. Toluene loadings were increased from a base steady state rate of 343-6,000 g/m(3) h for 1 h periods, with the polymer-aqueous system substantially outperforming a single phase system on the basis of improving the toluene removal efficiency and reducing the maximum toluene concentrations emitted during the transients. |
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Keywords: | Absorption Partitioning bioreactors Polymers Toluene VOCs |
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