Abstract：
:The removal of hydrophobic volatile organic compounds (VOCs) still remains the main restriction in the biological treatment of odorous emissions due to mass transfer limitations. The addition of a non-aqueous phase to conventional biotrickling filters (BTF) may overcome this limitation by enhancing VOCs transport from the gas to the microorganisms. This study compared the long-term and transient performance of a one- (1P) and two-liquid phase (2P; with silicone oil as non-aqueous phase) BTFs for the removal of four VOCs (butanone, toluene, alpha-pinene, and hexane) at empty bed residence times (EBRT) ranging from 47 to 6 s. Removal efficiencies (RE) >96 % were obtained for butanone, toluene, and alpha-pinene in both bioreactors regardless of the EBRT, while higher hexane REs were recorded in the 2P-BTF (81-92 %) compared to the 1P-BTF (60-97 %). The two-phase system always showed a more consistent performance, being able to better withstand step VOC concentration increases and starvation periods, although it was more affected by liquid recycling shutdowns due to a reduced VOC mass transfer. The analysis of the microbial communities showed a high biodiversity and richness despite the low C source spectrum and high community evenness and richness. In this context, the presence of silicone oil mediated the development of a highly different phylogenetic composition of the communities.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Lebrero R,Rodríguez E,Pérez R,García-Encina PA,Muñoz Rdoi
10.1007/s00253-012-4247-1subject
Has Abstractpub_date
2013-05-01 00:00:00pages
4627-38issue
10eissn
0175-7598issn
1432-0614journal_volume
97pub_type
杂志文章abstract：:The presence of microorganisms in biological fluids like urine and blood is an indication of vulnerability to infections. Iron is one of the important micronutrients required for bacterial growth. In an iron-deficit environment, bacteria release high-affinity iron-chelating compounds called siderophores which can be u...
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journal_title：Applied microbiology and biotechnology
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