Physical methods Heat Moist Heat Dry Heat Radiation Ionized radiati on,e.g. X-ray, Gamma Ray Nonionized radiation, e.g. UV

Heat Moist heat Autoclave Sterilization Boiling water, Hot water, Pasteurization Disinfection Dry heat Incineration Sterilization Dry oven Sterilization

M ETHODS OF M OIST HEAT

C OLD S TERILIZATION the principle effect of this method is to slow the growth of culture and microbes in food during storage. This method would kill some m.o. but not kill staphylococcus spp., Clostridium spp., Bacillus endospores. This method include: chilling, freezing, desiccation, all of which is not considered as sterilization method because it have erratic effect as well as their killing effect is uncertain.

(UV) TREATMENT SYSTEM FOR THE DISINFECTION OF WATER.

F ILTRATION