About Lesson
Process of destroying of microorganisms in milk
1. Heat: – common method of destroying microorganism
a. Sterilization destroys 100 % microorganism
b. Pasteurization destroy 99 % micro-organism
2. Radiation: – UV light / rays destroy the micro-organism
3. Chemical: – These include acids, alkalis, hydrogen peroxide, halogen etc.
4. High frequency sound wave: – not much exploited in dairy industry.
5. Electricity: – With electric current microorganism can be destroyed.
6. Pressure; – By giving 600 times greater pressure than that of atmospheric pressure micro-organism can be destroyed.