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Intrinsic kinetics of continuous growth and ethanol production of a flocculating fusant yeast strain SPSC01

Paper ID Volume ID Publish Year Pages File Format Full-Text
25401 43572 2006 10 PDF Available
Title
Intrinsic kinetics of continuous growth and ethanol production of a flocculating fusant yeast strain SPSC01
Abstract

The intrinsic kinetics of continuous yeast cell growth and ethanol production for a self-flocculating fusant yeast strain SPSC01 was investigated by means of mechanically dispersing the flocs and correspondingly established floc size distribution on-line monitoring technique using the focused beam reflectance measurement system, through which the floc intra-particle mass transfer limitation was effectively eliminated, but its ethanol formation metabolism was not affected. Modified kinetic models were developed, which can be used to predict the continuous kinetic behaviors of SPSC01, especially when low dilution rates are applied and limiting substrate concentrations are undetectable and almost all kinetic models developed previously are failed in predicting corresponding kinetic behaviors. Both substrate and product inhibitions reported for freely suspended yeast cell ethanol production were also observed for SPSC01 when high gravity media were fed and relatively high levels of residual sugar and ethanol presented. Model parameters were evaluated through numerical calculation method and validated by experimental dataμ=0.584CS0.155+CS+CS2/160.71−P1253.68+0.004 for growth,  ν=1.998CS0.427+CS+CS2/366.71−P1251.72+0.060 for ethanol productionThese intrinsic kinetic models can be further used to develop the observed kinetic models that quantitatively correlate the impact of the self-flocculating yeast cell size distributions on their apparent rates for yeast cell growth, substrate uptake and ethanol production and optimize the ethanol production process.

Keywords
Yeast; Self-flocculating; On-line monitoring; Continuous growth and ethanol production; Intrinsic kinetics
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Intrinsic kinetics of continuous growth and ethanol production of a flocculating fusant yeast strain SPSC01
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 124, Issue 2, 13 July 2006, Pages 363–372
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us