ETHANOL PRODUCTION QUIZ

What are the fermentation conditions for the ethanol production?

pH 5; temperature 35°C

pH 6; temperature 30°C

pH 5; temperature 30°C

pH 6; temperature 35°C

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used for aeration in a fermentor?

All of these

Baffles

Impeller

Sparger

TRUE ANSWER : ?
YOUR ANSWER : ?

Ethanol is produced by

continuous fermentation

none of these

both (a) and (b)

batch fermentation

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Baffles

Impeller

Sparger

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

High ethanol concentration

inhibits bacterial growth

promotes yeast growth

inhibits yeast growth

promotes bacterial growth

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Impeller

All of these

Sparger

Baffles

TRUE ANSWER : ?
YOUR ANSWER : ?

The Zygomonas has a merit over yeast because

it has more specific growth rate

All of these

it has more osmotic tolerance to higher sugar concentration

it has high tolerance to ethanol

TRUE ANSWER : ?
YOUR ANSWER : ?

How is air supply to the fermentor sterilized?

All of these

Filtration through granular material

By heat filtration

Filtration through fibrous material

TRUE ANSWER : ?
YOUR ANSWER : ?

S cerevisiae start producing ethanol with in

24 h

15 h

12 h

10 h

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following organism is not used in any of the traditional industrial fermentation?

Bacillus

Yeast

E. coli

Pseudomonas

TRUE ANSWER : ?
YOUR ANSWER : ?

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