Spray Drying Applications In Food Industries

Spray drying is a systematic technology widely used in food industries. Examples of spray drying in food industries are not rare to see nowadays. The material that needs to be dried was atomized in the drying chamber and then in contact with the hot air, the moisture of the material was quickly vaporized, and dried material will be obtained. Without evaporation and crushing, the drying process becomes simple and time-saving. This article will discuss spray drying applications in food industries. Following is an example of the spray drying of soybean to show more details of the drying procedure.


Spray drying applications — soybeans

Before spray drying, soybeans must be cleaned and peeled, and non-protein components such as fat must be cut to concentrate the most nutritious ingredients in soybeans. Soybeans after such concentration can be spray dried. The actual process of spray drying is divided into several steps: First, the liquid product is fed into the atomizer, and a high-speed rotating wheel in the atomizer atomizes the liquid so that the product becomes a solid-liquid mixed particle state. In the second step, the atomized particles are directed to a drying room with controlled temperature and airflow. The hot air evaporates the liquid in the particles. In order to make the final product meet the standard, the time that the particles are in contact with the hot air must be strictly controlled to maintain a certain amount of moisture in the powder product; at the same time, temperature and other parameters of the drying chamber should also be well controlled since all of these parameters have an effect on the final product. The last step is to collect the powder in the airflow into a container through the separator, and then the dried product can be packaged or mixed with other ingredients.

Soybeans are just one example of spray drying applications in food industries. And this example is to indicate different to-be-dried materials may require special handling (cleaned and peeled, etc) before drying. And this example also shows a more detailed spray drying process. In the later discussion, more examples will be listed to demonstrate spray drying applications in food industries.

Spray drying applications — fruit and vegetable powder

spray drying powder of blueberries

Spray drying method can be used in the processing of fruit and vegetable powder. Because of its unique advantages, fruit and vegetable powder can not only overcome the shortcomings of storage intolerance, easy rot and deterioration,  but also meet people’s needs for the trend of diversification and freshness of fruit and vegetables.

Spray drying applications — instant tea beverage

Instant tea beverage is one common application of spray drying in food industry. Instant tea beverage is a kind of solid beverage tea that can be quickly dissolved in water. It is convenient to carry and drink and has no residue left.

Spray drying applications — health food

Typical applications in this field are fish oil and propolis: the microencapsulation of fish oil through the spray drying process can not only effectively prevent its oxidative deterioration, but also mask the fishy smell.

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