Freeze - Drying

Freeze-drying — technically known as lyophilisation, lyophilization, or cryodesiccation—is a dehydration process typically used to preserve a perishable material or to make the material more convenient for transportation. Freeze-drying works by freezing the material and then reducing the surrounding pressure to allow the frozen water in the material to sublimate directly from the solid phase to the gas phase.

The process of freeze-drying was invented in 1906 by Arsène d’Arsonval and his assistant Frédéric Bordas at the laboratory of biophysics of Collège de France in Paris. In 1911 Downey Harris and Shackle developed the freeze-drying method of preserving live rabies virus which eventually led to development of the first anti rabies vaccine.

Modern freeze-drying was developed during World War II. The blood serum being sent to Europe from the US for medical treatment of the wounded required refrigeration, but because of the lack of simultaneous refrigeration and transport, many serum supplies were spoiling before reaching their intended recipients.

The freeze-drying process was developed as a commercial technique that enabled serum to be rendered chemically stable and viable without having to be refrigerated. Shortly thereafter, the freeze-dry process was applied to penicillin and bone, and lyophilization became recognized as an important technique for preservation of biologicals. Since that time, freeze-drying has been used as a preservation or processing technique for a wide variety of products.

These applications include the following but are not limited to: the processing of food, pharmaceuticals, and diagnostic kits; the restoration of water damaged documents; the preparation of river-bottom sludge for hydrocarbon analysis; the manufacturing of ceramics used in the semiconductor industry; the production of synthetic skin; the manufacture of sulfur-coated vials; and the restoration of historic/reclaimed boat hulls.

Source: Open library.

Recognizing the need for constant innovation and expansion, and a growing demand for more healthful fruits and vegetables, Gemuani has engineered and opened a state of the art freeze-drying facility with financial support from Agriculture Projects Management Agency (APMA) of Ministry of Agriculture, Ministry of Economics and sustainable development with USAID’s REAP.

Freeze-Drying is an all-natural process that removes 97% of the moisture from fresh fruits and vegetables. Raw materials are deep frozen, then transferred to a freeze-drying chamber where moisture, quickly converted into gaseous form, is removed under low pressure without the influence of heat.

With this added capacity, and taking advantage of the abundant fruit supply that comes from their own plantation as well as others in the region, the company has launched GEMUANI CRISPS – a line of all natural, freeze-dried snacks. Made from fresh, whole fruit without additives, sweeteners or preservatives, these light, crunchy, and delicious freeze-dried fruit snacks are perfect for supermarkets, convenience stores, and other such retailers catering to healthy lifestyles.


  • 100% all-natural, freeze dried fruits and vegetables.
  • No additives. No preservatives. No fat. No added sugar or sweeteners.
  • Retains up to 98% of the vitamins and nutrients found in fresh fruit.
  • Used the most advanced and safe technology for preserving nutrients, vitamins, aroma, taste, color and shape of fresh fruits and vegetables
  • Packed in high quality bags and jars to protect from moisture and light and to extend the shelf-life.
  • The perfect snack for any occasion.
  • A healthy alternative to chips and fatty snacks.

Wherever you go – traveling, camping, hiking or participating in scientific expedition

Wherever you are – at school, at work, at football stadium or at home

Whatever you do – baking a cake; making an exotic dish, or watching a movie…