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 microorganisms
- The fermenter usually has two steel jackets with water in between and this is known as the cooling jacket
- The steam which goes inside sterilises the tank in between the fermentations
- There is also a heater to raise the temperature inside the fermenter, combination of the cooling jacket and the heater allows for the optimum temperature for fermentation
- Nutrients (food for micro-organisms) are also added through a pipework
- A temperature probe inside the fermenter tells us whether to use the cooling jacket or the heater
- Requires the addition of micro-organisms through another tap
- The pH probe is built in to allow the maximum rate of reaction
- A motor is used to stir the reaction which agitates the mixture --> spreading the micro-organisms
- A way to drain off the product is required which leads to downstream processing which requires the purification of the product
The fermenter allows the optimum growth conditions for the micro-organism so it is able to produce the required product
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