Document Detail

Performance of a styrene-degrading biofilter containing the yeast Exophiala jeanselmei.
MedLine Citation:
PMID:  18633979     Owner:  NLM     Status:  PubMed-not-MEDLINE    
A general mathematical model developed for a description of pollutant degradation in a biofilm was used to evaluate the performance of a biofilter for the purification of styrene-containing gas. The biofilter contained perlite as an inert support on which a biofilm was present composed of a mixed microbial population containing the fungus Exophiala jeanselmei as a major styrene-degrading microorganism. Although styrene is a moderately hydrophobic compound, the biofilter was reaction limited at a styrene gas phase concentration of 0.1-2.4 g/m(3). Limitation of biofilter performance by the mass transfer of styrene was only observed at styrene concentrations lower than 0.06 g/m(3). A maximal styrene degradation rate of 62 g/(m(3). h) was maintained for over 1 year. At a high styrene concentration, the maximal styrene degradation rate could be increased to 91 g/(m(3). h) by increasing the oxygen concentration in the gas from 20 to 40%. After 300 days of operation, the dry-weight biomass concentration of the filter bed was 41% (w/w), and an average biofilm thickness of 240-280 microm, but maximal up to 600 microm, was observed. Experimental results and model calculations indicated an effective biofilm thickness of about 80 microm. It is postulated that the thickness of the effective biofilm is determined by the oxygen availability in the biofilm.
H H Cox; R E Moerman; S van Baalen; W N van Heiningen; H J Doddema; W Harder
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biotechnology and bioengineering     Volume:  53     ISSN:  0006-3592     ISO Abbreviation:  Biotechnol. Bioeng.     Publication Date:  1997 Feb 
Date Detail:
Created Date:  2008-07-17     Completed Date:  2009-12-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7502021     Medline TA:  Biotechnol Bioeng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  259-66     Citation Subset:  -    
Department of Environmental Biotechnology, TNO Institute of Environmental Sciences, Energy Research and Process Innovation, PO Box 6011, 2600 JA Delft, The Netherlands.
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