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On‐line estimation of biomass through pH control analysis in aerobic yeast fermentation systems
Author(s) -
Vicente Antonio,
Castrillo Juan I.,
Teixeira José A.,
Ugalde Unai
Publication year - 1998
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/(sici)1097-0290(19980520)58:4<445::aid-bit12>3.0.co;2-a
Subject(s) - chemostat , yeast , fermentation , biomass (ecology) , biochemistry , assimilation (phonology) , food science , chemistry , biology , bacteria , ecology , genetics , linguistics , philosophy
The amount of acid or base consumed in yeast cultures has been recently assigned to the pathway of nitrogen assimilation under respiratory conditions with no contribution by carbon metabolism (Castrillo et al., 1995). In this investigation, experiments under respirofermentative conditions have shown that production or consumption of ethanol does not contribute significantly to the specific rate of proton production (qH + ), thus extending the previously obtained relationships for all aerobic conditions in which other major acid/base contributions are not involved. Tests in batch and chemostat culture confirm the validity of qH + as a formal control parameter in aerobic fermentations. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 58:445‐450, 1998.