A hybrid model simulating multi-stage continuous fermentation of
Saccharomyces cerevisiae
Abstract
The performance of industrial strains has gradually improved with the
rapid development of synthetic biotechnology. The production efficiency
of traditional batch and fed-batch culture is limited and product
quality varies since both are dynamic processes, whereas multi-stage
continuous culture can maximise the production efficiency of specific
fermentation processes and achieve consistent product quality. However,
each single-stage fermentation under multi-stage continuous fermentation
requires accurate steady-state control, and a model with adequate
accuracy is required for designing and controlling a multi-stage
continuous fermentation process. At present, there are few reports on
kinetic models for the control of multi-stage continuous fermentation.
In this work, we constructed a hybrid model for Saccharomyces cerevisiae
multi-stage continuous culture, taking both oxygen limitation and
Crabtree effect. The accuracy of the model was ~ 80%,
advantages and limitations of the model are discussed and potential
improvement strategy is proposed.