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Borger’s waste salmon multicrusher aids biogas unit

The unit in operation
The unit in operation
A multicrusher made by Borger is playing a key role in the continuing success of an award-winning waste-to-energy operation in the Outer Hebrides, Scotland.
At Stornoway’s Creed Integrated Waste Management Facility on the Isle of Lewis, the Borger multicrusher consistently chops a seven-cubic tonne batch per shift of coarse waste salmon. This has enabled the facility to integrate the fish with household food waste and garden waste for its AD/biogas process.
The multicrusher cuts the waste to the required maximum particle size of 12mm.
Based on the proven design of the Borger Rotary Lobe Pump, the twin-shaft multicrusher homogenises the waste salmon to facilitate the pumping and pasteurisation process at Creed, ensuring that downstream equipment can operate smoothly.
By inserting individual blade disks and defining the direction of rotation of the shafts, operators have the flexibility to choose which way the pumped medium flows. Various blade widths and cutting profiles determine the final cutting yield.
Donnie Macmillan, plant manager at the Creed facility, said: “Borger’s multicrusher works extremely well for us in a very harsh environment. Some salmon waste can be quite tough and abrasive, so understandably we see wear on the cutters during our inspections, but that’s perfectly understandable.
“Importantly, the Borger unit helps us meet all of our PAS 110 requirements, which is all part of what we set out to achieve here - optimising the methods of managing waste - in this case not sending waste salmon to landfill sites, and not having to have it transported off the island.”
David Brown, Borger UK’s managing director, added: “We are very proud to play our part at Creed. It rightly deserves all the praise it gets for showing what can be done to protect the environment and reduce carbon footprint with good practice, forward-thinking and hard work.”

The unit in operation