engineering technology

Ever hear the term did not (scCO2), I might as well just to hear (understand the countryside became less slang), but I get the material might be of interest also to study in Indonesia. As we know that the function of drying the product is to reduce the water content in order to reduce the water activity in products that can prevent any damage. The water content in the product determines the expiration of the product, not one nih kalo, most bacteria can not live if his aw nila below 0.91 and the bacteria will stop growing at under 0.81% (it says Beuchat (1983)

From the water activities will certainly affect the activity of enzymes and vitamins in the food there, berubahnnya enzyme would alter the aroma, taste and appearance of food dai, therefore, until now researchers are still struggling to maintain vitamin and enzyme activity was the food included in the drying process.

Now the problem during the drying process so inikan using the sun or oven drying, where in this process is principally the water is expelled by using the porosity of the product so that the water contained in the product pores will evaporate and cause the product to be dried aka porositasnya empty (this reply said Krokida and Maraulis, 1997)

High temperatures used in drying process for this (not reply any temperature between 65-80 degrees Celsius) it causes damage to the micro structure of the material and what happens next ... will obviously affect the taste, color, etc. Teste worse is the decrease of contents vitamin that is the product.

Have no other method of drying? the answer is there like using a microwave drying, osmotic drying, freeze drying, and vacuum dryaing .. but as long as it remains just that the method still has the disadvantage of decreasing the product quality .. This research also is lho ... research results from (Vega-Mercado, Marcela Gongora-Nieto, & Barbosa-Canovas, 2001).

The advantage of the above techniques is usually a faster time than by using the sun .. but the fundamental weakness is the need of expensive energy .. (know yourself just adds fuel rises so expensive dong.