New design of essential oils extraction apparatus using ohmic heating is presented in chapter 1. Chapter 2 covers the Mathematical modeling and experimental study on thin layer halogen dryer of Strawberry and study it s effect on antioxidant activity. Effect of Ultrasonic Treatment on Buffalo Milk Homogenization is presented in chapter 3. Milk Flash Pasteurization by the Microwave and Study it s Chemical, Microbiological and Thermo Physical Characteristics are presented in chapter 4. The common non-thermal treatments such as Ultraviolet, UV, High Hydrostatic Pressure, Ultrasound and Microfiltration for Non-thermal milk pasteurization are described in chapter 5. Chapter 6 reviews the Milk pasteurization by Pulsed electric fields (PEF). Chapter 7 covered the design of non-thermal milk pasteurization apparatus by alternative electrical field with perpendicular electrodes. Chapter 8 is concerned with design of non-thermal milk pasteurization apparatus by alternative electrical field with cylindrical electrodes.