Instant coffee
Instant coffee in the form of dried
Instant coffee is a beverage derived from coffee and coffee powder form was available to taste tasting and processed by dry roasting method. Instant coffee is used even by institutions with boiling water and stir well to be able to use. This coffee is very convenient to use, can be stored for long and easy to use. In addition, soluble coffee black works great for slimming.
Instant coffee appeared on the market in 1950 and has grown rapidly to become one of the most common form of coffee. Count on a global scale, instant coffee and creating a stable revenue over $ 20 billion, the equivalent value compared to sales of the coffee chain.
Production of instant coffee
Processing of coffee goes through three steps to dehydration in coffee, coffee moved into a powdery particles (granule). The three steps are: Removal "early stage" (pre-stripping), reducing the quality of the coffee is dissolved (soluble coffee solids) and dried.
Removes the first stage: Before removal of the solvents, the volatile compounds were removed. Often this is done by passing steam through the coffee was roasted and milled.
Removal of the solvents of pure coffee: Water is used as a solvent. These solvents can be reduced in three ways: by reducing the filter (percolation batteries), reduced by the system "backward countries" (counter-current system) and the hybrid method (slurry extraction).
Reduced by the filter method: Coffee is kept in a piping system. Then the hot water through the system and reducing the dissolved substance in coffee. These substances are removed from the system, while coffee is extracted after being discharged.
Method reducible system "water backwards": Coffee is kept in a gutter tilt, then push up on by two nails turning at high speed. Hot water is then added to the top of the gutter, making the coffee dissolved in solution are reduced and exit through the bottom gutter.
Methods of reducing the mixture: Coffee and water are mixed together in a tank, then separated by centrifugal pumps.
Drying: There are two main methods for drying: drying frozen (freeze drying) and drying spray (spray drying).
Freeze drying: In this method, the water in the coffee evaporated leaving a solution with a high concentration of coffee. Then the solution was cooled to -40, creating ice crystals. Through the process of sublimation (solid converted to steam), is separated from rock crystal. Dry particles remaining part is instant coffee.
Spray drying method: After evaporation of natural, concentrated coffee solution is sprayed from a high tower into the hot air chamber. The circulation of hot air in the chamber separated from a solution of water and to dry the coffee powder.
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