My question is about yeast culture for bioethanol production on an industrial scale.
1. what brix (or sugar concentration) is suitable for yeast culture medium? and
How much should this brix reach at the end of cultivation?
2. How much dry yeast should be added to the culture medium at the beginning of cultivation?
[First, I prepared 130 ml molasses with Brix 14 along with nutrients for the culture medium and waited for about 24 hours. Brix in aerobic environment decreased from 14 to 6.5. I added 130 ml to 1300 ml molasses with Brix 18 for ethanol fermentation, but the fermentation result was not the same as when I used instant and dry yeast. I always got a yield of 7.5 to 8 % (v/v), but now the yield of ethanol production is 5.5% (v/v)].
Check https://www.sciencedirect.com/science/article/pii/S2405580816302424
Dear Mahsa dehghanzad thank you for your interesting technical question. In addition to the valuable references provided by Chinaza Godswill Awuchi please also have a look at this potentially useful article entitled
Bioethanol Production by Commercial Baker’s Yeast Using Sugarcane Molasses as The Media
Article Bioethanol Production by Commercial Baker’s Yeast Using Suga...
This article is freely available as public full text on RG.
The following article might also be of interest in this context:
Enhancement of the Efficiency of Bioethanol Production by Saccharomyces cerevisiae via Gradually Batch-Wise and Fed-Batch Increasing the Glucose Concentration
This paper is Open Access and can be downloaded from the general internet. For your information please find attached the pdf file.
Thank you for your attention.......... . Thank you for your answers...... .
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