Hydrosol’s service: customers can use our modern trial spraying plant for developing their products.

Spray drying, spray crystallization and microencapsulation on a small scale.

Our modern trial spraying plant at the Technology Centre of the Stern-Wywiol Gruppe plays a central role in our product innovations. Fitted with the latest equipment, the plant can be used for different kinds of spraying trials on a small scale in order to develop products or optimize formulations. We also have the capacity for producing samples under realistic manufacturing conditions, using larger volumes than conventional pilot runs. The advantage for our customers is that up-scaling for commercial production then presents no problems.

The trial spraying plant lends itself to developing new manufacturing methods for various kinds of powdered products: flavourings, colourants, fats and oils, proteins, enzymes, lecithins, stabilising and emulsifying systems, food supplements, vitamins, minerals and plant extracts.

Benefit by the skill of our experts

One outstanding feature of our trial spraying plant is the skill of our experts. For over ten years the companies in the Stern-Wywiol Gruppe, to which Hydrosol also belongs, have been developing innovative solutions for convenience products and novel ingredients. In doing so we set great store by an interdisciplinary approach.

Our specialists help customers save time and money. Because we know from experience which processes, combined with which parameters and raw materials, are most likely to meet specific demands. The experts from our group of companies carry out intensive applications research in the fields of flour improvers, enzyme systems, stabilising systems, vitamin and mineral premixes, food supplements, food lipids, feed additives and oleochemical specialities. We draw on our extensive knowledge of international markets, industries and raw materials in seeking solutions to problems.

Facts and figures

Processes available:Spray drying (centrifugal atomizer, co-current process)

Spray drying (nozzle atomizer, co-current process)
Spray drying (nozzle atomizer, counter-current process)
Spray crystallization (nozzle atomizer, counter-current process)

Technical data:

Drying at air temperatures up to 250 °C
Capacity 15–25 kg/hour

The direct route to spray drying, spray crystallization and microencapsulation

The plant’s design makes it flexible enough to use for a variety of purposes.

Spray drying

This process can be used efficiently to dry aqueous solutions, suspensions or emulsions into powder at moderate temperatures. Precise and reproducible temperature control also makes it possible to dry heat-sensitive ingredients. In addition, particle size distribution can be influenced by varying the process parameters.

Spray crystallization

This is the technology of choice for converting fats, waxes and other high-melting substances into free-flowing powder. The starting materials are liquefied and sprayed into the tower chamber through atomizer nozzles. The counter-current of cold air congeals the atomized melt, turning it into a free-flowing powder. The particle size distribution can be varied specifically by altering the process parameters.

Microencapsulation

Spray drying and cooling are the techniques most often used for encapsulating food ingredients. During this process, active substances are coated with one or more protective shell materials. By carefully selecting and combining the materials for these shells it is possible to control the release of the encapsulated substances. Processes such as hydrocolloid, lipid or matrix encapsulation are used to give maximum protection to delicate substances. It is in the selection and use of suitable raw materials for encapsulation that the interdisciplinary knowledge of the whole Stern-Wywiol Gruppe comes into play.