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Fermentation kinetics of Zymomonas mobilis near zero growth rate
Author(s) -
Jöbses I. M. L.,
Hiemstra H. C. H.,
Roels J. A.
Publication year - 1987
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260290415
Subject(s) - zymomonas mobilis , fermentation , kinetics , ethanol , growth rate , chemistry , ethanol fuel , lag time , substrate (aquarium) , steady state (chemistry) , ethanol fermentation , bacterial growth , fed batch culture , biochemistry , food science , biology , bacteria , biological system , mathematics , organic chemistry , ecology , physics , geometry , quantum mechanics , genetics
The fermentation kinetics Zymomonas mobilis were studied near zero growth rate in fed‐batch cultures and continuous cultures with complete cell recycle. The results show the ethanol enhances that specific substrate conversion rate under these conditions. The maximum achievable ethanol concentration in continuous cultures with cell recycle (66 g/L) was significantly lower than in fed‐batch cultures (100 g/L). The results indicate that growth‐rate‐independent metabolism is not instantaneous and can lag behind steadily increasing ethanol concentrations in fed‐batch fermentations. A model is proposed to account for this slow adaptation.