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    • Your Partner for Precision Grinding & Depackaging Solutions

    Reliable systems, engineered in Germany, built to last

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    This is Tietjen!

    Quality Made in Germany

    We stand for innovative hammer mills, advanced depackaging machines, and powerful plant engineering – tailor-made for animal feed, biogas production, and many other industries.

    We love challenges – complex customer requirements drive us. From the initial idea to seamless after-sales service, we support you as a reliable partner.

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    About Tietjen

    Facts

    Experienced
    More than 2,200 machines have been installed worldwide since 1959. Our customers range from small businesses to global corporations.
    International
    With our own dedicated employees in Germany, North and South America, Asia along with a global service network of sales partners, we serve customers around the world.
    Owner-managed
    We are an owner-managed company with direct hands-on operations allowing for fast decision-making processes and leadership – for long -term partnernships and sustainable success.
    Specialist
    We specialise in hammer mills, depackaging machines and plant engineering. Our comprehensive expertise in these areas reliably leads our customers to success.
    Look, What Tietjen Produces

    Our Main Product Areas and Services

    Our hammer mills and depackers are characterized by their reliability and durability. It is not uncommon for them to be in use for more than 20 years.

     

    Hammer Mill

    Tietjen offers more than 54 different hammer mills and crushers – ranging from compact models to high-throughput systems, for coarse or fine grinding.

    Organic Waste Separation

    The separation of organics and packaging is the most important process step in waste management. This is exactly where Tietjen’s depackaging machine, the press screw and our plant engineering come in.

    Service

    Installation, spare parts supply, maintenance work, on-site repairs – all this and more is part of our service.

    Plant Engineering

    From the initial idea to the complete system: Tietjen plans, designs, and implements customized systems that are perfectly tailored to your application and your process. Choose your plant engineering:

    Dry grinding Organic waste separation
    At a Glance

    Our Applications

    With decades of experience and a wide range of hammer mills and depackaging machines, Tietjen develops systems that are perfectly tailored to every application – ensuring maximum cost-effectiveness and process reliability.

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    Animal Feed Production
    Biomass to Energy
    Food Waste Recycling
    Wood & Fibres Processing
    Food & Beverage Production

    Get in Touch with Our Experts

    Let us know your application details and we find out the best solution for you.

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    Customer Testimonials

    What Our Customers Say about Us

    “Overall, the stability of Tietjen hammer mills is significantly better than the products we had previously installed here.”
    Markus Beckmann
    Site Manager at Bioceval, Cuxhaven, Germany
    “We all at Öresundskraft appreciate Tietjen’s way of working. They are reliable and do their job in a good way. We have had very good experiences with Tietjen; they have always done their best to find solutions and complete the project.”
    Alf-Erik Ragnarsson
    Project Manager Öresundskraft, Sweden
    “The Biomass Shredder BMS we have installed has a large capacity, so it can process a lot, and it doesn’t really matter what goes in, it just gets grinded. I would recommend the Biomass Shredder BMS to other biogas plants.”
    Lars Langskov Nielsen
    Owner of Lykkeslund Bioenergi, Denmark
    “Tietjen was our partner for the entire scope of fuel preparation, including the grinding system, storage, and dosing. We experience Tietjen as a reliable and highly professional partner with excellent technical expertise and outstanding communication – great people with quick response times in every situation. A good partner.”
    Henning von Krosigk
    Projekt Manager Mitsubishi Power Europe, Germany

    Our Most Important Products

    Hammer Mill FD Pro
    For Pet food and Fish Feed
    • Very high fineness
    • Highest throughput
    • Fat- and protein-rich recipes
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    Biomass Shredder BMS
    For manure, wood and straw
    • Makes difficult-to-ferment materials usable
    • Highest throughput
    • Increases biogas yield
    • No blockages
    Read more
    Hammer Mill GDL
    Flexible and Versatile
    • For frequently changing grinding parameters
    • Medium to high throughput
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    Depackaging Machine DRM
    Separates Organic Matter and Packaging
    • Superior double rotor principle
    • High degree of purity
    • Reliable and robust machine
    • Highly resistant to contaminants
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    Hammer Mill VDK
    Our All-Rounder
    • For a wide range of applications
    • Medium throughput
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    Drum Feeder DA 376
    Dosing for the Pro series
    • For free-flowing products
    • Separation of magnetic foreign bodies and heavy particles
    • Explosion decoupling
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    Use Cases Worldwide

    Be inspired by a selection of our reference projects.

    Alcohol & Bioethanol | Poland
    Production of Alcohol from Freshly Harvested Grain

    At Stock Polska, three NDK wet hammer mills grind freshly harvested grain and maize for alcohol production.
    Thanks to the wet process and stainless steel design, the system is particularly efficient, hygienic and low-maintenance – and meets the highest quality standards.

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    Aquafeed | Germany
    Highest Purity of Fishmeal for Fish Feed Production

    Our customer J. Müller achieves a purity level of around 95% in the production of fishmeal by using a VDK 4 hammer mill with an upstream cleaning system consisting of a drum screen and air separator.

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    Aquafeed | Vietnam
    Reducing Energy Consumption in Fish Feed Production

    DeHeus in Vietnam is increasing production capacity and is improving feed quality. At the same time, energy consumption will be reduced by 30% per tonne compared to the existing plant

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    Visit Us at the Upcoming Events

    Event•12/05/2026 – 13/05/2026
    FENAGRA
    Sao Paulo, Brazil
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    Event•18/05/2026 – 21/03/2026
    BIOGAS AMERICAS
    Detroit, MI, USA
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    Event•02/06/2026 – 04/06/2026
    VICTAM International 2026
    Jaarbeurs, Utrecht
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    Event•08/07/2026 – 09/07/2026
    THE WORLD BIOGAS EXPO
    NEC Birmingham, Birmingham, United Kingdom
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    Event•21/10/2026 – 23/10/2026
    FIGAP MÉXICO 2026
    Col. Verde Valle, Guadalajara, Jalisco, México
    Read more
    Event•10/11/2026 – 13/11/2026
    ENERGY DECENTRAL 2026
    Hannover, Germany
    Read more

    News

    Research & Development

    Tietjen News about substrate treatment for biogas plants

    Read here what’s new at Tietjen in the field of separation, dewatering and wet shredding for biogas plants.
    Research & Development

    Tietjen News: Grinding

    Read here what’s new in the field of grinding at Tietjen.
    About Tietjen

    66 years of innovation and expertise: We celebrate our anniversary

    66 years of Tietjen, 66 years full of innovations, progress and challenges. We look back on 66 eventful years.
    Research & Development

    Tietjen receives ERDF and LPW funding

    Thanks to the funding program, Tietjen can implement the patent and new mill technology.
    Send Us a Message

    Tell Us about Your Challenge. We´ll Find the Right Solution.

    Briefly describe your requirements to us – we will listen, ask the right questions and develop a customised Tietjen solution for your application.

    +49 4106 63 33-0
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