Bakers Journal

HRS offers steam injection for sterilization and dilution of plant based dairy

February 8, 2021
By Bakers Journal

The New HRS DSI Series uses direct steam injection to increase the speed of sterilizing products such as plant milk. Image courtesy of HRS Heat Exchangers

Plant-based milk products are experiencing a boost in popularity, and more bakeries are looking towards using injecting steam as a means of sterilizing and diluting liquid drink products.

According to reports, sales of vegan-friendly, plant-based milks have surged over the past two years. In response to this increased customer demand, HRS Heat Exchangers has added a new Direct Steam Injection System to its established range of pasteurization and sterilization systems.

The benefit of sterilizing using direct steam injection is the speed of the process, with sterilization temperatures of 212to 293°F. being reached in around a second, much quicker than the fastest heat exchanger systems. For products such as plant milks, this rapid heating prevents cooking of the product and formation of caramel-type compounds which can darken the product or produce unwanted flavours.

Some products, such as oat milk, also benefit from the additional dilution with water which the steam injection provides. In most cases, however the water which is added during the steam injection process needs to be removed from the end product. This is normally achieved using flash evaporation to remove excess steam and help cool the product, but there is a danger that volatile aromatic compounds can be lost, which could have a negative impact on certain products, such as fruit juices.


For this reason, not all products are suitable for steam injection.For products where direct steam injection is desirable, HRS Heat Exchangers has introduced the HRS DSI Series, which injects food grade steam into liquid products, providing an instant increase in the thermal process.Matt Hale, International Sales & Marketing Director at HRS Heat Exchangers, commented in a press release: “At HRS, we are always looking to provide full system solutions for the thermal treatment processes required by our clients. Aspart of this we have introduced the DSI Series of steam injection modules for the pasteurization and sterilization of products such as increasingly popular plant milks. The first DSI Series unit has been running successfully for a number of months now and we are pleased to be able to offer another solution to our customers.”


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