Sterilization

 Sterilisation is the process of complete destruction of all microorganisms present in a system. the products free from the microorganisms called "sterile products".

Methods of sterilization can be divided into three main groups.
1. Physical method -  Dry heat, moist heat, radiation (UV rays, ionization) sterilization.
2. Chemical methods : (bactericides, gaseous sterilization)
3. mechanical methods : (bacteria proof filters i.e ceramic filters, Seitz filter, sintered glass filter, membrane filter)