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Ethanol Production

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

Baffles
Sparger
All of these
Impeller

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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?

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

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

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Ethanol Production
The fermentor can be sterilized by

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

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Ethanol Production
How is air supply to the fermentor sterilized?

By heat filtration
Filtration through fibrous material
All of these
Filtration through granular material

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