Drying digestate

RM dryer in container - 300Indoor dryer remixing 600

Dorset has developed a concept for using the residual heat at biogas installations. By deploying a Dorset Dryer, use can be made of its residual heat during the entire year. The Dorset Dryer can, amongst others, be used for drying digestate.

The drying installation is designed to use residual heat in a highly cost-effective way. In case of a biogas installation, the drying installation replaces the emergency cooler. With a 500 KW installation, for instance, only two ventilators are used, which means that electricity consumption hardly rises. The airflow through the product is kept extremely low, so as to prevent dust from being generated. When drying digestate, it is also necessary to clean the air.

The advantages of drying digestate

  • Making good use of residual heat during the entire year;
  • Lower storage and transport costs;
  • New sales and utilization possibilities;
  • hygienization and reduced emissions/odours;

Advantages of the Dorset Dryer

  • Low energy consumption;
  • Highly compact and flexible;
  • Requires little maintenance;
  • Fully automatic operation without supervision is possible;
  • Through the remixing function, a pre- treatment of the digestate is not necessary;
  • Low dust generation through low air speed;
  • Simple to combine with Dorset air washers.

Gedroogd gescheiden materiaalGedroogd met terugmenging

Dried and separated material Dried with remixing


Dried and pelletized product

Possibilities for using dried digestate

Wet digestate can be converted into dry and valuable biomass for green energy. Other tried and tested possibilities are using it as an organic fertilizer (agricultural nutrient) or as litter in stable boxes



For more information about the drying of digestate please consult our brochure (PDF)


Dryer operations

The Dorset Dryer is a conveyor belt dryer. A general description of the dryer can be found in the section ‘Drying’. Our dryers process digestate according to this general principle, but digestate dryers have been modified for processing digestate in an optimal manner. When purchasing a dryer, the dryer is always carefully tailored to the wishes of the client and his operating circumstances: the properties of the digestate, the amount of residual heat that is available, the surface available for the equipment, the required capacity etc.

Digestate dryer tomo renderdigestate-dryer-container-tomo