From humble beginnings to global presence
In 2025, Tietjen Verfahrenstechnik GmbH celebrates its 66th anniversary. Since its foundation in 1959, the company has developed into one of the world’s leading specialists in grinding technology and substrate preparation machines for biogas plants.
The history of Tietjen began on a farm when company founder Hinrich Tietjen experimented with the preparation of feed for fattening pigs. His son, Dipl.-Ing. Johannes Tietjen, took over the technical development work in 1957 and laid the foundations for today’s company.
Milestones of innovation
Over the decades, Tietjen has continually revolutionised grinding and processing technology.
- 1959: Foundation of Tietjen Maschinen und Mühlenbau
- 1970s: Development of the first GD large chamber hammer mill
- 1980s: Breakthrough on the British market
- 1990s: Introduction of the remote-controlled, fully automatic screen change
- 2000s: Development of machines for substrate preparation for biogas plants
- 2010s: Thomas Runde joins Tietjen as a participating managing director and Konrad Pumpe as an investor
- 2020 Internationalisation and innovation: New developments and internationalisation have ensured a good order book, and the areas of grinding and substrate preparation for biogas plants have been brought into line.
Today, Tietjen serves customers all over the world, particularly in the animal feed, wood and biogas sectors. Despite its international success, the company remains true to its roots and continues to produce at the Hemdingen site in Schleswig-Holstein, Germany.
In addition to manufacturing individual machines, Tietjen has also established itself as a system provider for large grinding plants and biowaste treatment plants.
Innovation as the centrepiece
With a team of around 75 employees working, the owner-managed company is constantly on new projects and customised grinding solutions. The latest developments include
- Biomass shredder BMS for substrate processing for biogas plants
- Hammer mill FD 32 Pro: developed for high throughput and fine grinding, optimised for the requirements of pet food and fish feed production.
A look into the future
As a technical leader in grinding technology and biomass processing, Tietjen remains true to its motto: “We are great at making biomass small”. With 66 years of experience and an unbroken spirit of innovation, Tietjen is ideally equipped for the challenges ahead and looks to the future with great optimism.
We would like to thank our customers, partners and employees for 66 years of trust and look forward to writing the next chapters of our success story together.
