Mathematical Modeling and Simulation in Natural Flavors and Fragrances Bioproduction Intensification

摘要

Production intensification is nowadays done using mathematical models and universal process simulators,where modeling of specific biocatalytic kinetics can be difficult because often such models are simply not available.For the study of parametric influence on the system or for intensification tasks,specific biocatalytic kinetics has to be programmed individually.An example of such kinetics is also the bioproduction of 2-phenylethanol from L-phenylalanine by yeasts Saccharomyces cerevisiae.For the subsequent separation of 2-phenylethanol form the fermentation medium,membrane processes(microfiltration and membrane extraction)are applied,models of which are also missing in universal process simulators.Therefore,mathematical models of biotransformation and separation steps were developed and a model library with individual unit operations(bioreactor,microfiltration,membrane extraction,distillation)was assembled in this work.Description of the mathematical models is given and the approach towards the development of a custom simulation tool is presented.The finalized tool can simulate bioproduction of 2-phenylethanol in the batch mode as well as in a hybrid production system with continuous product removal.Simulation results can be used to study the production system as well as to master intensification tasks.