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Hydrocarbon fermentation: Kinetics of microbial cell growth
Author(s) -
Goma Gérard,
Ribot Denis
Publication year - 1978
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.260201104
Subject(s) - substrate (aquarium) , kinetics , growth rate , fermentation , hydrocarbon , chemistry , dissolution , bacterial growth , biomass (ecology) , limiting , exponential growth , thermodynamics , environmental chemistry , food science , organic chemistry , biology , bacteria , mathematics , ecology , physics , mechanical engineering , mathematical analysis , geometry , genetics , quantum mechanics , engineering
Modeling of microbial growth using nonmiscible substrate is studied when kinetics of substrate dissolution is rate limiting. When the substrate concentration is low, the growth rate is described by an analytical relation that can be identified as a Contois relationship. If the substrate concentration is greater than a critical value S crit , the potentially useful hydrocarbon S * concentration is described by S * = S crit /(1 + S crit / S ). A relationship was found between S crit and the biomass concentration X . When X increased, S crit decreased. The cell growth rate is related to a relation μ = μ m [ A ( X / S crit )(1 + S crit / S ) + 1] −1 . This model describes the evolution of the growth rate when exponential or linear growth occurs, which is related to physico‐chemical properties and hydrodynamic fermentation conditions. Experimental data to support the model are presented.