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May 2026

Plastics in Focus Edition 2/2026

Deodorizing Recyclates More Efficiently Than Ever: Coperion Introduces the EcoFresh Silo Degassing System

The requirements for plastic recyclates are continuously growing. Processors expect materials with high quality, low odor levels, and consistent properties – while recycling processes must operate energy-efficiently and economically.

Coperion Silo Degassing EcoFresh

Post-consumer recyclates (PCR) from packaging waste in particular often contain volatile organic compounds (VOCs), residual substances, or unpleasant odors that may still remain even after washing, extrusion, and pelletizing.

With the EcoFresh silo degassing system, Coperion offers a powerful solution for the reliable deodorization of recycled plastic pellets – delivering higher quality, improved sustainability and greater cost efficiency.

Innovative Silo Degassing for Highest Recyclate Quality

EcoFresh combines the process steps of heating, purging, and cooling in a compact dual-silo system. The plant consists of a deodorizing silo and a downstream cooling silo, arranged in series. This allows for continuous processing of the recycling material, ensuring highly efficient operation. In addition, EcoFresh is also available for batch processes. It can be installed flexibly either inside or outside the production building.

By specifically removing residual VOCs and odor-causing substances, EcoFresh significantly improves the quality of the recycled pellets. The material becomes more attractive for the production of new products and can also be used in demanding applications.

Key Benefits of EcoFresh at a Glance

Higher Product Quality
Effective deodorization increases the acceptance of recyclates. Odor-optimized materials with consistent properties open up new application opportunities and significantly improve the marketability of PCR materials.

High Energy Efficiency and Reduced Operating Costs
EcoFresh operates with a patent-pending heat energy recovery system that feeds energy back into the process. This measurably reduces energy consumption and CO₂ emissions while reducing operating costs and improving the total cost of ownership.

Compact Design and Small Footprint
EcoFresh requires only minimal installation space. This is particularly advantageous for companies looking to expand or modernize existing production sites.

Easy Integration into Existing Plants
EcoFresh can be easily integrated into existing recycling lines, allowing operators to selectively upgrade their processes without major modifications to plant structures.

Sustainable Contribution to the Circular Economy
By upgrading recyclates and improving their reusability, EcoFresh makes an important contribution to strengthening the circular economy for plastics.

Coperion Twin Screw Extruder ZSK
EcoFresh shows outstanding performance when combined with the Coperion ZSK twin screw extruder.

 

Perfect Synergy with the ZSK Twin Screw Extruder

EcoFresh demonstrates outstanding performance when combined with the Coperion ZSK twin screw extruder.
In the extruder, the recyclate is first melted, intensively mixed, homogenized, and degassed. With the help of stripping agents, up to 75% of the volatile components are reliably removed in this process step. EcoFresh then performs the thermal post-treatment and removes the remaining VOCs.

The result is high-quality, odor-optimized recyclates with significantly expanded application possibilities.

Testing Recycling Processes Under Real Conditions

Recyclers can evaluate the deodorizing performance of EcoFresh and the ZSK twin screw extruder at the Coperion Recycling Innovation Center. Both technologies are available there for comprehensive testing using actual material streams.

In combination with the Herbold Meckesheim Test Center, where shredding and washing of input materials takes place, Coperion can map the entire recycling process across its Test Centers.

Conclusion

With EcoFresh, Coperion sets new standards in the deodorization of plastic recyclates. This innovative silo degassing system combines top product quality with energy efficiency, easy integration, and high flexibility. In this way, EcoFresh helps recyclers operate more economically while actively advancing the circular economy for plastics.

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