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Ethanol Production

Ethanol Production
Yeast is used in the production of

curd
ethyl alcohol
acetic acid
cheese

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Ethanol Production
High ethanol concentration

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

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Ethanol Production
What are different substrates used for ethanol production?

All of these
Starch containing substrate
Waste product from wood or processed wood
Juices from sugarcane or molasses or sugar beet

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

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

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Ethanol Production
As the fermentation for the ethanol production is over, the cells are separated to get the biomass of yeast cells that is used

as single cell protein for animal feed
All of these
for next fermentation
as manure

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

Impeller
Sparger
All of these
Baffles

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