Specification Points:
5.5 understand the role of yeast in the production of beer
5.6 describe a simple experiment to investigate carbon dioxide production by yeast, in different conditions
5.7 understand the role of bacteria (Lactobacillus) in the production of yoghurt
5.8 interpret and label a diagram of an industrial fermenter and explain the need to provide suitable conditions in the fermenter, including aseptic precautions, nutrients, optimum temperature and pH, oxygenation and agitation, for the growth of micro-organisms
5.5 understand the role of yeast in the production of beer
5.6 describe a simple experiment to investigate carbon dioxide production by yeast, in different conditions
5.7 understand the role of bacteria (Lactobacillus) in the production of yoghurt
5.8 interpret and label a diagram of an industrial fermenter and explain the need to provide suitable conditions in the fermenter, including aseptic precautions, nutrients, optimum temperature and pH, oxygenation and agitation, for the growth of micro-organisms
Making Beer
|
|
Industrial Fermentation
|
|
Important details:
Cooling jacket – Keeps microorganisms at optimum temperature. They will produce lots of heat through respiration, therefore need to be cooled!
Paddles – Keeps stirring the mixture to stop waste products from building up and keeps air evenly mixed
Nutrient medium – Supplies microorganisms with fuel for respiration
Sterile air supply – Supplies clean O2 for respiration (note: NOT required in anaerobic fermentation processes)
Data-logger – monitors temperature and pH, keeps fermenter at optimum conditions
You don’t need to be able to draw this out, but you could be asked to label a diagram of a fermenter or to explain the function of the various parts.
Cooling jacket – Keeps microorganisms at optimum temperature. They will produce lots of heat through respiration, therefore need to be cooled!
Paddles – Keeps stirring the mixture to stop waste products from building up and keeps air evenly mixed
Nutrient medium – Supplies microorganisms with fuel for respiration
Sterile air supply – Supplies clean O2 for respiration (note: NOT required in anaerobic fermentation processes)
Data-logger – monitors temperature and pH, keeps fermenter at optimum conditions
You don’t need to be able to draw this out, but you could be asked to label a diagram of a fermenter or to explain the function of the various parts.
BBC Revision Resources:
Other fun stuff related to microorganisms in food
Armpit Cheese! (Very similar to making yogurt making)
|
|