Compound feed


As different as the individual mixtures and variations may be – basically, the compound feed production always follows the same principle. First, the stored raw materials are weighed and dosed. After milling with hammer mills, they are mixed according to the recipe, often with odour-intensive substances such as fats. As a consequence, odour emissions are produced from the animal feed production machine that can pollute the environment. Furthermore, dust is formed during the grinding of the fine, dry ingredients. Additional dust emissions occur during pelleting. It is no wonder that the requirements for dust and odour emissions have been tightened over time. This is because compound feed production volumes are increasing and residential areas are moving ever closer to the manufacturing sites. To comply with the strict limits on production, we put dust and odour emissions in their place. With our COPLAS clean technology, we offer a modular system for treating the exhaust air from several production lines – individually or together. We reduce any odours from compound feed production sustainably without any chemicals or waste products.

Your requirements

  • Optimised system design
  • Simple maintenance and operation
  • Maximum system availability and 24/7 operation
  • High operational reliability and low operating costs
  • Minimal space requirements
  • Compliance with occupational safety standards
  • Sustainable and energy efficient technologies
  • Compliance with laws as well as official and technical guidelines

Our services

  • Standardised and individualised solutions for industrial air pollution control throughout the entire compound feed production process
  • Technologies for reducing industrial odours at various emission points
  • Dedusting of conveying systems, dryers, production and packing machines
  • Pneumatic solutions for a gentle handling of bulk materials
  • Customer-specific plant designs based on on-site Customizing
  • Certified solutions according to ATEX and pressure equipment guidelines
  • Process engineering components to increase plant safety, constructive explosion and fire protection
  • High degree of automation and possibility for integration into existing IT infrastructure

Your project is our focus


Demanding projects require good planning. Our technical sales team will work hand-in-hand with you to develop a solution that perfectly meets your requirements. If necessary, we carry out tests on-site with our mobile COPLAS clean unit and support you with BImSchG applications. Find the right contact person for your project.


We use our technical expertise, the latest 3D applications and cutting-edge programming languages to create your individual project. We offer industry-specific expert knowledge and decades of experience in handling global projects – all from a single source.


Production, pre-assembly and quality testing activities take place at our main site in Leopoldshöhe, Germany. We excel in worldwide shipping and export matters to deliver our solutions to your door.


Riedel's experienced personnel will ensure trouble-free installation and commissioning of your system at your site – mechanical and electrical assembly combined. We would be happy to accompany you during subsequent official acceptance measurements.


We are there to help you with any questions you may have and are your long-term partner when it comes to maintenance & repair, optimization & upgrade and spare parts.


  • Fabric filters

    Our dedusting solutions can achieve clean gas dust contents below 1.0 mg/m³ as standard. Furthermore, in many cases, the air can be fed back into production. The result is that dust emissions are reduced by using fabric filters and we play our part in taking care of our environment. Our JMS hose filters, JMP cartridge filters and JMT bag filters are cleaned automatically with compressed air. These dedusting solutions are also available in stainless steel, with pressure shock resistance, trace heating and insulation as well as fire and explosion protection. We have the expertise to find the right type of industrial fabric filter for your production requirements.

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  • Venturi & absorption scrubbers

    Venturi scrubbers are a proven, industry wide solution for air pollution control. Our HNA venturi scrubber can reliably remove dust from damp exhaust air flows. This wet scrubber is designed to clean gas dust content of below 5.0 mg/m³ with reasonable energy expenditure. The scrubbing liquid is treated and cleaned via automatic belt filters or time-controlled outlet valves, which empty automatically during the operation of a partial load. The absorption scrubber reduces acidic and basic as well as gas-laden components in the exhaust air to the permissible values.

  • COPLAS clean – Odour reduction with cold plasme

    Our cold plasma treatment eliminates odours just like nature, only faster. COPLAS clean is our non-thermal plasma technology for industrial odour control. Odours are eradicated without any chemicals, water or waste. Our patented plasma reactors produce reactive oxygen and OH radicals, which are then injected into the exhaust air. The ingenious result is that odour molecules are oxidised in just milliseconds by non-thermal plasma technology – without any direct contact with your systems.

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  • Pneumatic transport

    Bulk materials such as cut tobacco, tea, chips or crystal sugar are transported gently with our pneumatic transport system to keep production changes to an absolute minimum. Our patented SACU tobtronic® is the most effective and safest technology to ensure blockage-free, pneumatic conveying of bulk materials at a low speed. The patented FPC pipe couplings avoid gaps and edges that can affect the bulk material.

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  • VAC & NetVac® – Industrial central vacuum cleaning systems

    Our industrial central vacuum cleaning systems improve the working conditions of your employees, increase plant availability and reduce wear and tear. Industrial central vacuum cleaning systems are more efficient than mobile industrial vacuum cleaners. These central vacuum cleaning systems ensure that any removed material, such as dust, bulk material or production residues, are collected in a central location. As a result, waste disposal is much simpler. There is no limit to the number of cleaning points that can be installed.

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  • Central dust and material handling – industrial dust collection system

    A central industrial dust collector enhances the efficiency and cleanliness of machines, systems and buildings. Our dust collector systems consolidate bulk materials, dusts or products at central locations. When the dust collection system is in suction operation, the bulk material is automatically taken from the collection points and then transported over long distances. At the receiving point, the product is sent for further processing, loaded or compacted for disposal.

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COPLAS clean

COPLAS clean

  • Expert article on odour reduction
  • Publication in Mühle + Mischfutter
  • Interview with Lars Kükenshöner


Compound feed // Germany

Gutter dedusting for a grain production plant

Fabric filter JMT bag filter

  • Air volume: 100.000 m³/h
  • Filter area: 603 m²
  • Dust discharge: screw in the filter hopper and rotary valve
  • Radial fan: 132 kW
  • Frequency converter: 132 kW
  • Silencer: 100.000 m³/h
  • Maintenance platform
  • Filter breakthrough monitoring
  • Gutter suction wall
  • Dedusting pipeline
  • Explosion decoupling device
  • Explosion relief device
  • Automation


  • Residual dust content < 10 mg/m³
  • ATEX-compliant filter design
  • Differential pressure-controlled filter cleaning

Compound feed // Germany

Process dedusting for a feed mill

Fabric filter JMS hose filter

  • Air volume: various
  • Filter area: various
  • Dust discharge: rotary valve
  • Radial fan: various
  • Silencer: various
  • Dust discharge duct
  • Explosion decoupling device
  • Explosion relief device


  • Homogeneous aspiration
  • ATEX-compliant filter design
  • Differential pressure-controlled filter cleaning
  • Dust recirculation into the production process
  • Residual dust content < 10 mg/m³
You are looking for a solution partner for your project?
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We are looking forward to hearing from you!

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