Concept

Ethanol fermentation

Related publications (92)

Control of yeast fed-batch process through regulation of extracellular ethanol concentration

Urs von Stockar, Sergio Valentinotti, Christopher Cannizzaro

At high growth rates, the biomass yield of baker's yeast (Saccharomyces cerevisiae) decreases due to the prodn. of ethanol. For this reason, it is std. industrial practice to use a fed-batch process whereby the specific growth rate, m, is fixed at a level ...

Springer-Verlag2004

Hydrogen production by Clostridium thermolacticum during continuous fermentation of lactose

Jean-Paul Schwitzguebel, Nevenka Adler, Christophe Collet

In the production of acetate by Clostridium thermolacticum growing on lactose, considerable amounts of hydrogen were generated. Lactose available in large amounts from milk permeate, a wastestream of the dairy industry, appears to be a valuable substrate f ...

2004

Monitoring and control of Gluconacetobacter xylinus fed-batch cultures using in situ mid-IR spectroscopy

Urs von Stockar, Ian William Marison, Sergio Valentinotti, Henri Kornmann

A partial least-squares calibration model, relating mid-IR spectral features with fructose, ethanol, acetate, gluconacetan, phosphate and ammonium concns. has been designed to monitor and control cultivations of Gluconacetobacter xylinus and prodn. of gluc ...

2004

Metabolic control analysis under uncertainty: Framework development and case studies

Vassily Hatzimanikatis

Information about the enzyme kinetics in a metabolic network will enable understanding of the function of the network and quant. prediction of the network responses to genetic and environmental perturbations. Despite recent advances in exptl. techniques, s ...

2004

Optimal Control of Fed-Batch Fermenters

Dominique Bonvin, Urs von Stockar, Sergio Valentinotti, Christopher Cannizzaro, Martin Rhiel

Optimal control of fed-batch fermenters S. Valentinotti† C. Cannizzaro‡ M.Rhiel‡ U. Holmberg† U. von Stockar‡ D. Bonvin† †Institut d’Automatique, EPFL, 1015 Lausanne, Switzerland ‡Institut de Genie Chimique, EPFL, 1015 Lausanne, Switzerland Fermentors are ...

2000

Fermentation by gut microbiota cultured in a simulator of the human intestinal microbial ecosystem is improved by supplementing a soygerm powder

Bart Deplancke

An in vitro model, designated the Simulator of the Human Intestinal Microbial Ecosystem (SHIME), was used to study the effect of a soygerm powder rich in beta-glycosidic phytoestrogenic isoflavones on the fermentation pattern of the colon microbiota and to ...

2000

A process for the in-situ extraction of fermentation broths

Urs von Stockar, Ian William Marison

A process is provided for the in-situ extn. of a fermn. product esp. for products which result from the transformation of an amino acid and which are sol. in the fermn. broth. The sol. product is then removed from aq. phase by extn. into an org. phase wher ...

(Inotech A.-G., Switz.).2000

O-17 NMR spectroscopy of sulfolenes (2,5-dihydrothiophene-1,1-dioxides) and sultines (3,6-dihydro-1,2-oxathiin-2-oxides)-experiment and quantum calculations: Synthesis of 4,9-dioxo-1,2-oxathiacyclodecane-2-oxide, a new heterocycle

Pierre Vogel, Kurt Schenk

The products of hetero-Diels-Alder reactions (sultines) and cheletropic addition reactions (sulfolenes) between 1,3-dienes and sulfur dioxide can be distinguished by their O-17 NMR shifts. Experimental data have been collected for derivatives of 3,6-dihydr ...

2000

Systematic errors in data evaluation due to ethanol stripping and water vaporization

Urs von Stockar

Systematic errors due to the neglect of water and/or ethanol partition between liq. and gaseous phases are discussed for bioreactors equipped with or without a condenser. Both water vapor and ethanol vapor are present in the off-gas leaving the condenser. ...

1998

Identification and control of oxidative metabolism in Saccharomyces cerevisiae during transient growth using calorimetric measurements

Urs von Stockar

The objective of this study was to characterize the dynamic adaptation of the oxidative capacity of Saccharomyces cerevisiae to an increase in the glucose supply rate and its implications for the control of a continuous culture designed to produce biomass ...

1998

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