Freeze drying vs Spray drying

Freeze drying vs Spray drying

Throughout the years, various dairies have seen the differences in the demand of the customers, along with their growth. Everyone does not know the differences in the methods used to make powder from the milk of different breeds, such as camel, cow, goat, sheep, etc. They consider that a specific method may affect the quality of the product they are purchasing. That is not the case, which we will be trying to clarify for the readers. The two different processes used for drying camel milk is freeze drying and spray drying. These two methods have an ever-increasing demand, as it enables an organization to enhance its productivity as well as profitability.

Camel milk is a nutritiously dense product, which has the characteristics of lower fat and cholesterol, and higher protein content. Experts have suggested that both the spray drying and freeze drying process are equally important and a costly process in producing the high-quality dried products.

Camel milk is on the slightly higher side when it comes to the price, it’s production is also low, as the population of camels is not that high, when compared to that of cows. In practice, the spray drying process was used, but today,, freeze-drying process has gained popularity for preserving camel milk and its functional properties.

In simple terms, both the processes affect the physicochemical characteristics of dried camel milk. Spray drying has been a widely used method, as it uses a very short amount of heat and has a higher rate of evaporation, which gives a high-quality product, at a lower cost. In contrast to this, freeze drying is a process, whereby the water is removed from a frozen solution through sublimation. Due to the presence of vacuum, the ice evaporates immediately, without turning into water. This ensures that all the properties of the milk are retained and the consumer gets all the required nutrients and vitamins as needed by the body. Freeze drying process is used to reduce the degradation reactions and maintain the actual physical, chemical and biological stability of the product, when it is to be stored for a longer term.

Now, the question arises, what is the main quality criteria of camel milk powder. The answer is, solubility, flowability, hygroscopicity, along with the water activity. Experts have stated that the freeze dried process has shown that it retains the nutritional properties of the milk as compared to raw milk. These experts have also said that camel milk powder has an amorphous structure, along with spherical particles, which can be produced by the spray drying process.

Further, experts conducted a research on the microstructure of camel milk, and the results showed that reconstitution through the spray dried process allowed for the full diffusion of the milk particles, with the creation of homogeneous consistency. In terms of the differences in the volume of the milk fat globules, experts have stated that the globule sizes increase after both the freeze drying and spray drying processes are completed. The results of the research were as follows:

  1. The freeze drying process had a significant effect on the liquid ordered domains in the milk fat globules membranes. This was formed due to the presence of cholesterol in the milk.
  2. In the spray drying process, the liquid ordered domains were formed by glycerophospholipids.

Which is more popular? Freeze Drying or Spray Drying?

Today, the freeze drying process has gained much attention because it helps retain all the nutrients and minerals that are present in the milk form. This is a process whereby a small amount of the milk is frozen and then put under vacuum, which helps in preserving everything. It seems to be the perfect method, as it even allows you to travel with it, without any hassle. With more benefits, it can be said to be completely safe for consumption. These are: 

  1. It is lightweight.
  2. It has no added preservatives or color.
  3. It can be shipped around the world easily.
  4. A majority of the nutritional value is retained.
  5. There is no requirement of energy or electricity to consume it.
  6. All it requires is water and the correct amount of product, and you’re all set!

In terms of the spray drying process, all types of milk, when they are dried, tend to lose most of its water content due to the higher amount of heat, and significant vitamins and minerals, which is not the case in the freeze drying process.

Did you know that you can go ahead with the freeze drying process at home too! It has amazing benefits, with almost no difference as compared to the fresh produce, and helps in killing the harmful microorganisms. Both the spray drying and freeze drying processes involve a process called Pasteurization, because milk has certain bacteria called Mycobacteria and Listeria. Experts believe that most of the dried dairy products are spray dried, however, other experts believe that the freeze dried process is the one method that will stay in the long-run. Spray drying even affects the taste and chemical properties of the milk, but the freeze drying method ensures that the product stays at its best.

Freeze drying vs Spray drying

Why Aadvik Camel Milk?

Aadvik chooses the freeze drying method as its major process for drying the milk, which means that most of the nutrients are retained in the powder form. This means more nutrients and vitamins for you. We, at Aadvik, try to maintain the balance between a good environment and the best products for you. It is your belief in us that has helped us get so far, and allows us to follow our mission of providing quality products to you. We hope to combine techniques with love and the best of ingredients for your benefit! 

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