Modeling and analysis of layered stationary anaerobic granular biofilms.

Abstract:

: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.

journal_name

Biotechnol Bioeng

authors

Tartakovsky B,Guiot SR

doi

10.1002/(SICI)1097-0290(19970420)54:2<122::AID-BIT

subject

Has Abstract

pub_date

1997-04-20 00:00:00

pages

122-30

issue

2

eissn

0006-3592

issn

1097-0290

journal_volume

54

pub_type

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