Document Detail

Kinetics of microbial growth and biodegradation of methanol and toluene in biofilters and an analysis of the energetic indicators.
MedLine Citation:
PMID:  18778740     Owner:  NLM     Status:  MEDLINE    
The kinetics of microbial growth and the biodegradation of methanol and toluene in (a) biofilters (BFs), and (b) biotrickling filters (BTFs), packed with inert materials, has been studied and analyzed. The specific growth rate, mu, for the treatment of methanol was 0.037h(-1) for a wide range of operating conditions. In the BF, mu was found to be a function of the methanol and toluene concentrations in the biofilm. In the BF used for treating methanol, mu was found to be affected by (1) the nitrogen concentration present in the nutrient solution, and (2) the kind of packing material employed. The kinetics of the methanol and toluene biodegradations were also analyzed using "mixed order" models. A Michaelis-Menten model type provided a good fit for the elimination capacity (EC) of the BTF treating methanol, while a Haldane model type provided a good fit to the EC of the BF treating methanol and toluene. The carbon dioxide production rate was related to the packed bed temperature and the content of the volatile solids within the biofilm. For the BF, the ratio of temperature/carbon dioxide production rate (PCO(2)) was 0.024 degrees C per unit of PCO(2), and for the BTF it was 0.15 degrees C per unit of PCO(2).
Antonio Avalos Ramirez; Sandrine Bénard; Anne Giroir-Fendler; J Peter Jones; Michèle Heitz
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-08-20
Journal Detail:
Title:  Journal of biotechnology     Volume:  138     ISSN:  0168-1656     ISO Abbreviation:  J. Biotechnol.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-10     Completed Date:  2009-03-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8411927     Medline TA:  J Biotechnol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  88-95     Citation Subset:  IM    
Department of Chemical Engineering, Faculty of Engineering, Université de Sherbrooke, 2500, boulevard de l'Université, Sherbrooke (Québec), J1K 2R1 Canada.
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MeSH Terms
Bacteria / drug effects,  growth & development*
Biofilms / drug effects,  growth & development
Bioreactors / microbiology*
Biotechnology / methods
Carbon Dioxide / metabolism
Methanol / analysis,  metabolism*
Nitrogen / pharmacology
Toluene / analysis,  metabolism*
Reg. No./Substance:
108-88-3/Toluene; 124-38-9/Carbon Dioxide; 67-56-1/Methanol; 7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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