Aspesis is vital in biotechnological proccesses involving organisms - contaminants are unwanted microorganisms that can interfere with production, they:
- Compete with culture for space and nutrients
- Reduce yeild of useful products from the cukture
- may cause spoilage of the product or produce toxic chemicals
Aseptic techniques are used to ensure asepsis.
Aseptic tecniques at lab level - sterilisation of equptment and near by areas before and after use; heating with flame, UV light or disinfectant sprays.
Aseptic techniques art large scale culture level - Washing, disinfecting and steam cleaning the fermemter between each use kills microorganisms. Polished stainless steel used to stop microorganisms sticking well to its surface. Steralising nutrient mediums before use to stop contaminates being introduced. Fine filters entering and exiting the vessel aviod microorganisms entering.
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