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Airknife Waste Separation

A versatile system to blow out lighter materials from your waste stream.

Solution Overview


The system consists of a series of specially designed material collection hoods which are typically mounted in the ceiling of the sorting cabin above the waste belts. The operator simply offers the film or plastic to the hood and it then automatically sucked away.

The unique internal ‘Jetcone’ hood design uses a closed loop system to minimise operational noise levels and the amount of air withdrawn from the sorting cabin. Conveying air, used to transport the material, is recycled back through a return air system to significantly reduce the cabin make up air requirements. A series of collection hoods can be connected together via a range of ductwork, meaning all material is transported to a single point within the MRF, eliminating the need to duplicate material storage bunkers to match each hand picking location.

Conveyed material is typically fed directly into a bale press to reduce material volumes, minimising labour and transport costs. The material is separated from the airstream via a specially adapted Impact rotary material separator and reverse jet filter system. The Impact Film Vacuum System has proven to be a highly valued addition to the domestic waste recycling process, offering MRF designers maximum design flexibility and improved segregation of recyclables.

Screw Compactor

A valuable addition to any Film Vacuum System, this simple design allows collected material to be compressed into an expanding plastic bag to produce a ‘sausage’ like bale. A single screw auger, discharge tube and retaining ring provide a simple yet highly reliable, cost effective solution to reduce bulky material into manageable volumes.


  • Wide range of material applications
  • Fully adjustable both via manual dampers and electronic fan speed controls
  • Significant reduction in manual sorting labour requirements and costs
  • Significantly improves the performance of downstream processes by removing unwanted contaminants
  • Custom designed enclosures to suit a variety of Air knife locations
  • High material throughput capabilities
  • Low maintenance
  • Quiet operation
  • Used in conjunction with the Impact range of material separators and dust filtration

Case Study

Plasterboard Recycling – Airknife Separation

Impact Air Systems were contacted by Hamilton Waste & Recycling Ltd, operating in extensive waste collection and recycling facilities in East Lothian.

David Hamilton, director of Hamilton Waste & Recycling commented:

“We are delighted with the air separation and dust extraction technology that Impact Air Systems provided for our plasterboard recycling system. Not only are we delighted with the performance of the system, but also the service we received from Impact Air, from our initial discussions through to the commissioning of the plant.  Impact Air’s system has certainly surpassed our expectations and we at Hamilton Waste & Recycling Ltd will be looking first at Impact Air Systems for any future air separation and dust extraction systems.”