green machines

About us

processing organic waste streams

Dorset Green Machines is a globally operating machine manufacturer. We develop and produce solutions for processing organic waste streams using waste heat

We process the waste streams by drying with use of residual heat. Commonly used concepts are:

  • Drying poultry manure with use of farmhouse air
  • Drying digestate with use of waste heat from CHP cooling water
  • Drying sewage sludge with use of waste heat from energy production
  • Drying woodchips with waste heat from energy production

Proven functionality

These concepts have proven their functionality over the years. With over 900 installations running, Dorset Green Machines is one of the most experienced dryer manufacturing companies in the world.

Installations delivered approx.
Different countries

Why dry?

Drying significantly reduces storage and transport costs, while increasing fuel capacity. When drying poultry manure, it provides a healthier environment around the farm area. The dried product can be sold as valuable organic fertilizer or used as fuel for green energy or can be processed further.

Total solution

One company for all aspects.

Research & Development






company goal

The original goal in 1996, while founding Dorset Green Machines, was to develop a drying equipment in order to solve the manure problems the Dutch pig farmers were having. The problems were due to overproduction of manure compared to the amount of farm land available. 

The goal of Dorset to this day similar but expanded to a more general territory: solving organic waste problems by providing solution for commercially attractive processing of these streams.

Latest development

Our latest available developments are the pyrolysis plant and the arnold evaporator

Dust washer

Using air cleaning system to reduce dust emissions at the poultry farm or air from the drying process.

The Arnold Evaporator

It wil separate clean water from the liquid at very low energy input. The output water has cleanness qualities that make it suitable for discharge to surface water or sewer (NH4 < 5 mg/l)

Part of Dorset Group

Dorset Green Machines is part of Dorset Group – About Dorset Group. Dorset Group was founded at Aalten in 1984. Its main production facilities and engineering department are still located in The Netherlands. The sales and service departments are spread through various locations across Europe.