HRS DSI Direct Steam Injection pasteuriser or steriliser

The HRS DSI Direct Steam Injection pasteuriser or steriliser has been developed in response to the rising global demand for plant-based ‘milk’ drinks by manufacturers around the world.

The benefit of sterilising using direct steam injection is the speed of the process, with sterilisation temperatures of 100 to 145°C being reached in around a second, much quicker than the fastest heat exchanger systems. The faster the product is heated and cooled, the less impact the heat has on the product — in the case of plant-based drinks this can include discolouration, caramelisation and the introduction of off-tastes.

Grain-based products such as oat milk also benefit from the additional dilution with water, which the steam injection provides.

The HRS DSI injects food-grade steam into liquid products, providing an instant increase in the thermal process. Direct steam injection isn’t just limited to the production of plant milk. It is also suitable for a range of extended shelf life (ESL) dairy products as well as low-viscosity products with small particulates such as soups and sauces, non-dairy creams and starch-based products.

A number of HRS DSI units are now operational around the world, and the hygienic stainless steel DSI can be supplied on its own or with heat exchangers for pre-heating and final cooling to provide a complete UHT (ultra-heat treatment) system for plant-based products.