Abstract
A recently established mixed culture fermentation (MCF) model has been modified to account for the role of different electron carriers in the process. The MCF-model predicts the product spectrum as a function of the actual environmental conditions using a thermodynamic optimization criterion while satisfying a number of constrants. Other improvements made to the original model are the inclusion of formate as fermentation end-product, and gas-liquid mass transfer. The model is adequately capable of reproducing experimental results in terms of butyrate and formate versus hydrogen/carbon dioxide production. The model is not capable of predicting the production of an ethanol/acetate mixtue as measured at higher pH-values, suggesting specific biochemical control. Catabolic acetate production can potentially be explained by anabolic requirements for a specific electron donor like NADH.
Original language | English |
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Pages (from-to) | 493 - 497 |
Number of pages | 4 |
Journal | Water Science and Technology |
Volume | 57 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Jan 2008 |
Keywords
- acidogenesis
- electron carrier
- fermentation
- mathematical model