KVV E-Modules - Fermentation Types

Quadrant -I (Video)

Fermentation Types

Quadrant - II (Study Material)

1. Fermentation types

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Quadrant - III (Assignments)

1. Fermentation types

Fermentation is one of the ancient food processing technologies. Fermentation is defined as a process in which chemical changes occur in an organic substrate through the action of enzymes produced by microorganisms. For example, yeast enzymes convert sugars and starches into alcohol, while proteins are converted to peptides/amino acids. Fermentation takes place in the lack of oxygen that produces ATP (energy). It turns NADH and pyruvate produced in the glycolysis step into NAD+ and various small molecules depending on the type of fermentation.

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Quadrant - IV (MCQs)

1.Batch fermentation is a…….

A: a) Open system B: b) Closed system C: c) Continuous system D: d) Non continuous

2.In continuous fermentation…….

A: a) No nutrients are added B: b) Medium is added continuously C: c) Process stops frequently D: d) Only batch process occurs

3.Fed-batch fermentation is used to……

A: a) Stop growth B: b) Maintain substrate concentration C: c) Remove oxygen D: d) Reduce volume

4.Anaerobic fermentation occurs in……

A: a) Presence of oxygen B: b) Absence of oxygen C: c) High temperature D: d) Low pressure

5.…… fermentation requires oxygen

A: a) Anaerobic B: b) Aerobic C: c) Solid-state D: d) Batch

6.Submerged fermentation uses…….

A: a) Solid medium B: b) Liquid medium C: c) Gas medium D: d) Dry medium

7.Solid-state fermentation occurs in……

A: a) Excess water B: b) No substrate C: c) Low moisture conditions D: d) Only liquid

8.Chemostat controls growth by……

A: a) Temperature B: b) Turbidity C: c) Limiting nutrient D: d) Pressure

9.Turbidostat works based on…….

A: a) pH B: b) Temperature C: c) Turbidity D: d) Oxygen

10. ……. fermenter is simple but labor intensive

A: a) Drum fermenter B: b) Column fermenter C: c) Tray fermenter D: d) Stirred tank

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