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Ethanol Production

Ethanol Production
The fermentor can be sterilized by

keeping it in the oven
steam under pressure
all of these
boiling

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Ethanol Production
Which of the following is used to check vortex and to improve aeration efficiency in a fermentor?

All of these
Baffles
Impeller
Sparger

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Ethanol Production
High ethanol concentration

promotes bacterial growth
promotes yeast growth
inhibits yeast growth
inhibits bacterial growth

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Ethanol Production
To maintain aseptic conditions during fermentation which of the following is needed?

Sterilization of fermentor
Aeration and agitation
All of these
Sterilization of air supply

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Ethanol Production
Which of the following is used for agitation in a fermentor?

Baffles
Sparger
All of these
Impeller

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Ethanol Production
If starch containing substrates are used for ethanol production, yeast strain can't be used directly because

None of these
starch is not a suitable substrate for the production of ethanol
it is converted to pentose sugar
it doesn't contain amylases to hydrolyze starch

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