413994 Gaseous o-Xylene Biodegradation in Two-Liquid Phase Airlift Bioreactor and Biotrickling Filter Configurations

Monday, November 9, 2015
Exhibit Hall 1 (Salt Palace Convention Center)
Chao Wu and Wei Li, Institute of Industrial Ecology and Environment, Zhejiang University, Hangzhou, China

Biotrickling filter (BTF) applications in two-liquid phase bioreactors (TLPB) are limited by the lack of agitation, ozone clogging in the long term and a further promotion in mass transfer. Versus a two-liquid phase BTF with silicone oil as a non-aqueous phase, a two-liquid phase airlift bioreactor (ALR) was developed to remove gaseous o-xylene. A higher elimination capacity of 26% was obtained for the two-liquid phase ALR (92 g·m-3·h-1, removal efficiency of 91%) versus the two-liquid phase BTF. Removal efficiency of the two-liquid phase ALR was constant and above 90% regardless of the inlet concentration. More complete removal of o-xylene was observed for the two-liquid phase ALR under both steady state and shock-load conditions. Therefore, sufficient mixing is essential to the TLPBs for the removal of hydrophobic VOCs. However, microbial diversity in the two-liquid phase ALR was not richer than that of the two-liquid phase BTF. The dominant microbial community was Comamonas in the two-liquid phase ALR, Chitinophagaceae in the two-liquid phase BTF.

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See more of this Session: Poster Session: Environmental Division
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