A straightforward logistic method for feeding a fed-batch baker's yeast culture

Daniel Borowiak , Tadeusz Miśkiewicz , Witold Miszczak , Edmund Cibis , Małgorzata Krzywonos

Abstract

The aim of this work was to find a straightforward, low-cost method for nutrient medium delivery during fed-batch cultivation of baker's yeast; a method that provides a high specific growth rate, a high biomass yield, and a high dough-leavening ability. The time profile for the inflow of the nutrient medium, g(t), is a logistic model which takes the form of g(t) = a/(1 + be−ct), with a, b and c standing for its parameters. The initial values of a, b and c were calculated considering the results of a baker's yeast process where dissolved oxygen tension was used as a control parameter of medium inflow. A method was developed for modifying the parameters of the initial model so as to obtain a formula that would cause the inflow of the nutrient medium to maximize the criterion K(K = Yμ), where Y stands for yeast biomass yield and μ denotes specific growth rate. The parameters of the modified model depended on initial biomass concentration. The relation was described by a logarithmic function and incorporated into the control algorithm. This algorithm produced a biomass yield exceeding 0.55 g g−1 and a high dough-leavening ability. The method proposed is recommendable for small and medium-sized firms producing baker's yeast
Author Daniel Borowiak (EaE / IChaFT / DBE)
Daniel Borowiak,,
- Department of Bioprocessing Engineering
, Tadeusz Miśkiewicz (EaE / IChaFT / DBE)
Tadeusz Miśkiewicz,,
- Department of Bioprocessing Engineering
, Witold Miszczak (WUEB)
Witold Miszczak,,
- Wroclaw University of Economics and Business
, Edmund Cibis (EaE / IChaFT / DBE)
Edmund Cibis,,
- Department of Bioprocessing Engineering
, Małgorzata Krzywonos (EaE / IChaFT / DBE)
Małgorzata Krzywonos,,
- Department of Bioprocessing Engineering
Journal seriesBiochemical Engineering Journal, ISSN 1369-703X, (A 35 pkt)
Issue year2012
Vol60
Pages36-41
Keywords in Englishbaker's yeast cultivation, dough leavening ability, control algorithm, fed-batch culture, logistic model, method for nutrient delivery
ASJC Classification2204 Biomedical Engineering; 2305 Environmental Engineering; 1502 Bioengineering; 1305 Biotechnology
DOIDOI:10.1016/j.bej.2011.09.016
URL http://www.sciencedirect.com/science/article/pii/S1369703X11002610
Languageen angielski
Score (nominal)35
Publication indicators WoS Citations = 5; Scopus SNIP (Source Normalised Impact per Paper): 2014 = 1.226; WoS Impact Factor: 2012 = 2.579 (2) - 2012=2.984 (5); Scopus Citations = 6
Citation count*7 (2020-09-17)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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