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Modeling and analysis of layered stationary anaerobic granular biofilms

โœ Scribed by B. Tartakovsky; S. R. Guiot

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
175 KB
Volume
54
Category
Article
ISSN
0006-3592

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โœฆ Synopsis

A model that portrays substrate profiles in a steady-state multispecies granular biofilm is developed and coupled with a biofilm detachment model. The model accounts for glucose, propionate, hydrogen, and acetate transformations performed by three bacterial trophic groups: acidogens, syntrophic bacterial consortia, and methanogens. This model adequately describes the phenomenon of propionate degradation under thermodynamically unfavorable bulk hydrogen concentrations. Also suggested is the superiority of the layered biofilm structure over homogeneous distribution of the trophic groups for anaerobic degradation of organic compounds. Furthermore, model analysis suggests that with increasing bulk glucose concentration biofilm thickness reaches a maximum that is then followed by biofilm disintegration. These results may have an important impact on the design and control of upflow anaerobic sludge bed reactors. Biotechnol Bioeng 54: 122-130, 1997.

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