Preserving with germ-free process

http://t0.gstatic.com/images?q=tbn:ANd9GcR1ksPP

_heQdSvZU0obRb6bk2rgEN0l7qrUmg-JZIqdFXzxHfSe

By: Bambang Djanuwardi

In principle there are 2 ways to get food free from germs is by sterilization and pasteurization. Sterilization can be done naturally premises heating equipment at a temperature above the boiling point to kill germs, viruses, spores and fungi.
The sterilization using chemicals commonly used antiseptic such as alcohol, mercury and alkali. How chemicals can also use a disinfectant to prevent infection of microorganisms such as bacteria and viruses. Type commonly used disinfectant is chlorine or formaldehyde.

Preservation of food / beverage

http://t2.gstatic.com/images?q=tbn:ANd9GcQuOc6NN9

YRJSCvLV2TPPqDAsujjqzlOeM8XHnSuIRYjuc3fj_6lrFluqtvVA

By:Bambang Djanuwardi

There are many preservation methods such as a natural , biological and chemical means. Preserved naturally include heating and cooling .The principle with heating is to kill microorganisms that can cause material damage. While cooling either to lethal microorganisms, also can inhibit the potential food harmful microorganisms. Biological preservation methods such as fermentation, and using enzymes. Fermentation as in processes, like change carbohydrates into alcohol. 
 While the chemical preservation, use chemicals to preserve. These chemicals are often used for preservation, among others proplonat acid to prevent growth of mold / fungi, citric acid, benzoate, sulfate salt, chlorine, nitrite and nitrate ,burp and other. Preservation using chemicals often found in the market, because of practical, easy and inexpensive.