Question

describe conditions and outcomes of boiling pasteurization and surfacing. which of these treatment can be considered as sterilization and why

Answer 1

Sterilization is the removal of microorganisms like bacteria,fungi and diesease causing organism from food.boiling and pasteurization are two standard methods for sterilization of food products.

BOILING:

it is the process of heating of a substance til there is a rapid vaporization of a liquid. it occurs when a liquid is heated to aspecific temperature called as boiling point. At this temperature the vapor pressure of the liquid is equal to the pressure exerted on the liquid by surrounding atmosphere to which hinders the evaporation.There are three types of boiling. They are

1)nucleate boiling( This is where small bubbles of vapor form at discrete points)

2)critical heat flux boiling (the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface.)

3)Transition boiling

PASTEURIZATION:

Pasteurization is a method of treating food by applying heat to a certain point to kill disease-causing organisms with out compromising the flavor or quality of the food.

NOTE:even though boiling and pasteurization are not 100% sterlized one. but these methods are considered as standerd methods of sterilization.