Food dehydrator is one of the world’s oldest techniques of meals preservation, with the standards of this system influencing a number of the maximum present day techniques of meals science. Here, we can elevate the lid at the lengthy and sundry records of dried meals and find out the way it has prompted the extraordinary technology at the back of meals we consume each day.
THE ANCIENT TECHNIQUE OF DEHYDRATING FOOD
Drying meals withinside the solar has been occurring seeing that the start of recorded human records. All you want is direct daylight for some of days and a low humidity surroundings of under 20%.1 So, your geography matters, that’s why solar-dried meals are this sort of vital a part of positive cultures. Evidence suggests that Middle Eastern and Oriental cultures dried meals as early as 12,000 BCE. Around 2,800BCE the historical Egyptians used to dry fish, poultry, dates and raisins for lengthy-time period storage. In the Middle Ages (among 630CE to 1630CE) cocoa leaves and end result have been solar-dried in Mexico and Peru.
And a number of the historical dehydration techniques are nonetheless the great ones, take for instance solar-dried tomatoes. After being cleaned, taken care of and pretreated with sulphites, halved tomatoes are laid out on wood drying trays withinside the solar for nine to fourteen days.6 When in comparison with mechanical alternatives, solar-drying tomatoes continues to be the great approach to save you lack of vitamins and permit flavours to pay attention into its one-of-a-kind taste.
THE FIRST FOOD DEHYDRATION MACHINE
The first automatic drying system changed into created in 1795 through French inventors Masson and Chollet. The device fed sliced fruit and veggies right into a warm-air dehydration chamber, with a managed temperature of 40°C dehydrating produce prepared to be pressed and sealed in tin foil.three Since then, a number of strategies for dehydrating meals were developed. Here we can study how of the maximum not unusualplace drying techniques work.
SPRAY DRYING FOOD
The dairy enterprise is one in all the biggest processors of dehydrated meals. Many dairy merchandise are spray dried, which means they’re atomised right into a high-quality mist then added into touch with warm air. The moisture is straight away eliminated, leaving handiest the milk powder as a product. This approach is used to make powders including milk, whey and yeast, in addition to a few ice creams, cheese and fruit juices. Although spray drying meals offers you the product quickly, it’s miles a completely highly-priced method that calls for a number of energy.
FREEZE DRYING FOOD
As the meals is frozen, the moisture in it’s miles became ice. It is then placed right into a vacuum at -45°C and the ice is eliminated through sublimation, which means it is going at once from a stable to a gas, with out ever coming into liquid form. The gain is that the meals will keep its shape and flavour, and nearly any meals may be freeze dried.1 Like spray drying however, this approach also can be highly-priced. To make up for excessive manufacturing costs, it’s miles especially used on excessive-price merchandise for consumers, including coffee.
PROS AND CONS OF DEHYDRATED FOOD
Food dehydration reduces the dimensions and weight of the meals, at the same time as preserving a number of its dietary content. For example, in case you dry nine.1kg of plums you may get 1.1kg of prunes. This makes it tons simpler to move and store, now no longer to say an extraordinary sturdiness of 6 months to a year, in comparison to a normal three-five days for a clean plum.
So, what are the downsides? Firstly, dehydrated meals receives a terrible popularity for converting the flavor of meals, frequently now no longer for the better, in addition to growing a hard and leathery texture. On pinnacle of that, many meals lose nutrients and different beneficial vitamins withinside the system. For example, apples, apricots, peaches and plums free 6% in their nutrition A, 55% of thiamin, 10% of niacin, and a large 56% in their nutrition C while they’re dried.