Ideal system for every bacterial strain

Fluidised bed drying

As an alternative to the freeze-drying process, the bacterial concentrate in the Microbial Additives department of the plant can also be dried using a fluidised bed process. The final product gained from this process is a spherical probiotic, coated with a preservative. Similar drying processes are used in the pharmaceutical industry for the manufacture of tablets.

The fluidised bed drying capacities in detail

Microbial Additives

We have the following capacities in the Microbial Additives business segment:

  • 300 kg/batch production

  • 2 kg/batch pilot plant

Fluidised bed drying in our business field

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Microbial Additives

In the first step of the fluidized bed process, so-called pellets are put into the process vessel. By applying a constant process air flow, a strong mixing (fluidized bed) of the pellets in the process vessel is generated. Subsequently, the liquid bacteria concentrate is fed into the container via spray lances, dispersed into very fine droplets and continuously applied to the pellets. At the same time, drying takes place under mild conditions (34-38°C). In a further step, the protective layer is applied on the pellets in the same way. Finally, in the clean room the finished end product is filled into bags (max. 25 kg) or into big bags (500 kg).

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Thomas Lautischer

Product Manager

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Grinding

After drying, further processing takes place in the respective powder line. The product flakes dried by lyophilisation are crushed in mills.

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Mixing

After the drying and milling process, the powder is processed on the relevant powder line and the final product is mixed according to specification.

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Packaging

After processing in the respective powder line, the dried powder is filled according to customer's requirements.

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Storage

Appropriate storage is essential to ensure the stability of the finished products.

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Fermentation

Lactosan has three complete fermentation lines which are controlled by a process control system and can be fully sterilised.

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Separation

Fermentation is followed by a concentration step using a separator.

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