Effects of temperature on microbial ethanol production I. The temperature profile curve of ethanol production of the yeast strain saccharomyces cerevisiae Sc 5

Richter, K.; Becker, Ulrike

doi:10.1002/abio.370070118

Acta Biotechnologica

1987

DOI: 10.1002/abio.370070118

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Effects of temperature on microbial ethanol production I. The temperature profile curve of ethanol production of the yeast strain saccharomyces cerevisiae Sc 5

K. Richter

Ulrike Becker

Abstract: The temperature-profile curve of ethanol production of the yeast Succhuromyces cerevisiae Sc 5 is shown. Accordingly the biokinetic sphere of ethanol formation consists of 5 ranges. The maximum specific ethanol formation rate v,, is reached within the temperature limits of 32°C 5 T 5 36OC, and the maximum temperature for ethanol formation amounts to T& = 57'C. Within the first suboptimum temperature range ethanol formation is not retarded thermally. Using a modified ARRHENIUS equation the activation energy of … Show more

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Effects of temperature on microbial ethanol production. III. The influence of the temperature on the relation existing between the specific ethanol formation rate of the yeast Saccharomyces cerevisiae Sc 5 and the ethanol concentration in the culture medium

Richter

Becker

1988

Acta Biotechnologica

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The ethanol-inhibitory behaviour of the yeast Sacchammyces cerevi&ze S c 5 was found to be characterized by a continual-linear relation between the specific ethanol formation rate and the ethanol concentration. Therefore the simple equation v = v,, -a. P could be applied for it.It is shown that this model is correct only then, if all of the process parameters are in their optimum.Out of the optimum temperature range the characteristics of the function v = f(P) change in such a way that in regard to the ethanol concentration P twc linear relations exist for each suboptimum temperature: vT = vhT -a , . enT. P, for P < PT and vT = vo -a . P, for P > PT, and a non-linear equation is current for each superoptimum temperature:where 8, is also a function of the temperature and always less than 1.Taking as a basis these equations the specific ethanol formation rate of the used strain can be calculated for the whole biokinetic PIT-sphere of ethanol production.

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Effects of temperature on microbial ethanol production. III. The influence of the temperature on the relation existing between the specific ethanol formation rate of the yeast Saccharomyces cerevisiae Sc 5 and the ethanol concentration in the culture medium

Richter

Becker

1988

Acta Biotechnologica

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Effects of temperature on microbial production IV. The influence of ethanol on the temperature‐profile curve of ethanol production

Richter¹,

Becker²

1989

Acta Biotechnologica

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The shape of the temperature profile curve of ethanol production changes in the presence of ethanol. So the characteristic points of the curve are shifted to lower values at increasing ethanol concentrations. As a reason for it the potentiation of thermal deactivation effects by ethanol already at lower temperatures is assumed. Compared to it, the activation energy of ethanol formation in the suboptimal temperature range was found to be unaffected by alcohol.

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Effects of temperature on microbial ethanol production I. The temperature profile curve of ethanol production of the yeast strain saccharomyces cerevisiae Sc 5

Cited by 2 publications

References 22 publications

Effects of temperature on microbial ethanol production. III. The influence of the temperature on the relation existing between the specific ethanol formation rate of the yeast Saccharomyces cerevisiae Sc 5 and the ethanol concentration in the culture medium

Effects of temperature on microbial ethanol production. III. The influence of the temperature on the relation existing between the specific ethanol formation rate of the yeast Saccharomyces cerevisiae Sc 5 and the ethanol concentration in the culture medium

Effects of temperature on microbial production IV. The influence of ethanol on the temperature‐profile curve of ethanol production

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