5.7 Yoghurt

Understand the role of bacteria (Lactobacillus) in the production of yoghurt

1. Cow produces milk through the process of milk production. 

2. Milk goes through process called pasteurization to remove pathogens such as TB bacillus. This heat treatment kills off any pathogens in the milk. 

3. Milk sugars are converted into lactic acid. This is brought about by incubating the milk by 45-46 Celsius and add lactobacillus, which produces the enzyme that breaks down the milk sugar lactose to produce lactic acid.

4. Lactic acid results in lower pH, creating acidic condition. This causes milk proteins.

5. Milk proteins will solidify. This solidification of milk product produces what we called yoghurt.