Oscillatory Behavior Control in Continuous Fermentation Processes

Oscillatory Behavior Control in Continuous Fermentation Processes

The continuous fermentation processes involving yeast Saccharomyces cerevisiae or bacterium Zymomonas mobilis often exhibit oscillatory behavior. Because, the oscillatory mode of operation may lead to higher or lower average ethanol concentrations, hence, there is a natural need to control this behavior. The idea presented in this paper is based on the use of a mixture of two substrates that ar...

Oscillatory behavior in enzymatic control processes.

Robust Control of Continuous Fermentation Processes Described by Monod-type Model with Delay

Discrete nonlinear problem for control synthesis of continuous fermentation processes is formulated and method for robust control synthesis is developed. The method consists of an optimal robust control design and an input/output linearization via nonlinear state feedback. The obtained total control is a robust one. It linearizes the nominal nonlinear system, determines global asymptotic stabil...

Evolutionary Algorithms for Optimal Control in Fed-Batch Fermentation Processes

In this work, Evolutionary Algorithms (EAs) are used to achieve optimal feedforward control in a recombinant bacterial fed-batch fermentation process, that aims at producing a bio-pharmaceutical product. Three different aspects are the target of the optimization procedure: the feeding trajectory (the amount of substrate introduced in a bioreactor per time unit), the duration of the fermentation...

Modeling Of Alcohol Fermentation In Brewing - Integrated Approch For Control Of Continuous Alcohol Fermentation

An integrated approach for the management of continuous beer fermentation with immobilized cells was developed. Experimental results for continuous fermentation were used for the development of dependencies for the calculation of real extract and ethanol at different degrees of fermentation and dilution rates. For this purpose, mathematical relationships describing the fermentation with high ac...