Open AccessThe effect of n-dodecane addition on oxygen transfer in stirred bioreactors for Saccharomyces cerevisiae broths
Author(s) -
AncaIrina Galaction,
Elena Folescu,
Dan Caşcaval
Publication year - 2005
Publication title -
chemical industry and chemical engineering quarterly
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.189
H-Index - 26
eISSN - 2217-7434
pISSN - 1451-9372
DOI - 10.2298/ciceq0501001g
Subject(s) - saccharomyces cerevisiae , bioreactor , yeast , oxygen , dodecane , chemistry , biomass (ecology) , mass transfer , food science , chromatography , biology , biochemistry , nuclear chemistry , organic chemistry , agronomy
The previous works on simulated and P. shermanii broths were continued and developed for Saccharomyces cerevisiae broths. The obtained results indicated the considerable increase of k?a in the presence of n-dodecane as an oxygen-vector, but the magnitude of this effect had to be correlated with the biomass characteristics, especially with hydrophobicity. Due to the higher affinity of yeast cells for hydrocarbon droplets, increase of the oxygen mass transfer rate was lower than that recorded for simulated broths or bacterial suspensions.