The use of oxygen uptake rate to optimise air feed rate to a continuous ethanol fermentation

Catherine Hack, R Marchant, W McClean

Research output: Contribution to journalArticle

Abstract

In a continous ethanol fermentation in a stirred tank reactor, the effect of oxygen transfer rate on the biomass concentration, specific activity and overall ethanol productivity of a thermo-tolerant yeast Kluyveromyces marxianus was investigated. The dissolved oxygen concentration was maintained at zero. Although an increased oxygen transfer rate led to an increase in biomass concentration, the reduction in specific activity led to a reduction in overall ethanol productivity. The optimum oxygen transfer rate was zero. The maximum ethanol productivity was 1.3 mL/L h. The ethanol productivity in the stirred tank reactor was compared with two alternative fermenter configurations: - two fermenters in series - poorly mixed aerated fermenter An ethanol productivity of 3.9 mL/L h was achieved in both these systems.
LanguageEnglish
Pages187-190
JournalPrehrambeno-tehnoloska i Biotehnoloska Revija
Volume32
Issue number4
Publication statusPublished - Oct 1994

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continuous fermentation
ethanol fermentation
ethanol
fermenters
oxygen
air
Kluyveromyces marxianus
biomass
dissolved oxygen
yeasts

Cite this

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title = "The use of oxygen uptake rate to optimise air feed rate to a continuous ethanol fermentation",
abstract = "In a continous ethanol fermentation in a stirred tank reactor, the effect of oxygen transfer rate on the biomass concentration, specific activity and overall ethanol productivity of a thermo-tolerant yeast Kluyveromyces marxianus was investigated. The dissolved oxygen concentration was maintained at zero. Although an increased oxygen transfer rate led to an increase in biomass concentration, the reduction in specific activity led to a reduction in overall ethanol productivity. The optimum oxygen transfer rate was zero. The maximum ethanol productivity was 1.3 mL/L h. The ethanol productivity in the stirred tank reactor was compared with two alternative fermenter configurations: - two fermenters in series - poorly mixed aerated fermenter An ethanol productivity of 3.9 mL/L h was achieved in both these systems.",
author = "Catherine Hack and R Marchant and W McClean",
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The use of oxygen uptake rate to optimise air feed rate to a continuous ethanol fermentation. / Hack, Catherine; Marchant, R; McClean, W.

In: Prehrambeno-tehnoloska i Biotehnoloska Revija, Vol. 32, No. 4, 10.1994, p. 187-190.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The use of oxygen uptake rate to optimise air feed rate to a continuous ethanol fermentation

AU - Hack, Catherine

AU - Marchant, R

AU - McClean, W

N1 - 2nd Croatian Congress of Food Technologists, Biotechnologists and Nutritionists, ZAGREB, CROATIA, JUN 15-17, 1994

PY - 1994/10

Y1 - 1994/10

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AB - In a continous ethanol fermentation in a stirred tank reactor, the effect of oxygen transfer rate on the biomass concentration, specific activity and overall ethanol productivity of a thermo-tolerant yeast Kluyveromyces marxianus was investigated. The dissolved oxygen concentration was maintained at zero. Although an increased oxygen transfer rate led to an increase in biomass concentration, the reduction in specific activity led to a reduction in overall ethanol productivity. The optimum oxygen transfer rate was zero. The maximum ethanol productivity was 1.3 mL/L h. The ethanol productivity in the stirred tank reactor was compared with two alternative fermenter configurations: - two fermenters in series - poorly mixed aerated fermenter An ethanol productivity of 3.9 mL/L h was achieved in both these systems.

M3 - Article

VL - 32

SP - 187

EP - 190

JO - Prehrambeno-tehnoloska i Biotehnoloska Revija

T2 - Prehrambeno-tehnoloska i Biotehnoloska Revija

JF - Prehrambeno-tehnoloska i Biotehnoloska Revija

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