GLORIA — GEOMAR Library Ocean Research Information Access

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Modeling of an industrial alcohol fermentation and simuiation of the plant by a process simulator (1995)

Pascal, F. ; Dagot, C. ; Pingaud, H. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 46 (1995), S. 202-217

add to mindlist on the mindlist

Details

ISSN: 0006-3592

Keywords: batch process ; steady-stage process ; fermentation ; modeling ; simulation ; ethanol ; Chemistry ; Biochemistry and Biotechnology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology

Notes: The aim of the present study was the development of a general simulation module for fermentation within the framework of existing chemical process simulators. This module has been applied to an industrial plant which produces ethanol from beet molasses and fresh beet juice by Saccharomyces cerevisiae. An unstructured mechanistic model has been developed with kinetic laws that are based on a chemically defined reaction scheme which satisfies stoichiometric constraints. This model can be applied to different culture conditions and takes into account secondary byproducts such as higher alcohols. These byproducts are of prime importance and need to be correctly estimated because a sequence of distillation columns follow the fermentor in the plant. Important measurement campaigns have been performed on the plant to validate the model. Plant operation has been successfully simulated using the same kinetic model for both continuous and fed-batch modes of production. © 1995 John Wiley & Sons, Inc.

Additional Material: 12 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/bit.260460304

Permalink

	Location	Call Number	Limitation	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Kinetic study and mathematical modelling of killer and sensitive S. Cerevisiae strains growing in mixed culture (1997)

Ramon-Portugal, F. ; Délia-Dupuy, M. L. ; Pingaud, H. ; [et al.]

Springer

Bioprocess engineering 17 (1997), S. 375-381

add to mindlist on the mindlist

Details

ISSN: 0178-515X

Source: Springer Online Journal Archives 1860-2000

Topics: Process Engineering, Biotechnology, Nutrition Technology

Notes: Abstract This paper presents a kinetic study of two yeasts growing in pure and mixed batch cultures. Two winemaking strains were used: S. cerevisiae K1 possessing the K2 killer character and S. cerevisiae 522D sensitive to the K2 killer toxin. Initially the kinetics of growth of the two strains were analysed in pure culture. In this case, the kinetic profiles of biomass production have shown that the growth rate of the K1 strain is slightly superior to the 522D strain. During the fermentation, the viability for both populations was higher than 90%. Fermentations in mixed culture with an initial percentage in killer strain of 5 and 10% with respect to the total population were carried out. The results showed a more important decrease in the percentage of total viable yeasts when the initial concentration of killer yeast increased. However, the kinetic profiles of total biomass (killer plus sensitive yeasts) were very similar for both fermentations. A mathematical model was proposed to simulate the microbial growth of the killer and sensitive strain developing in pure and mixed cultures. This mathematical model consists in three main reactions: the evolution of the killer toxin in the culture medium, the duplication and the mortality rates for each microbial population. The results of the simulation appeared in agreement with the experimental data.