Introducing the Gribuster HDS

21 May 2014

This year’s changes to the landfill tax status of trommel ‘fines’ mean huge increases in the costs of waste disposal, and waste management operators, small and large are already feeling the pinch. However, trommel fines typically comprise of 80% material that, if separated, would qualify for the lower UK landfill tax, saving an operator generating 10,000 t/year over £640,000.

In response, Siltbuster, leading UK waste management experts, have designed the Gritbuster HDS (Hydraulic Density Separator) unit to provide customers with a means of minimising their landfill by separating light, low density particles from dense particles (e.g. organic material from sand and gravel).

Waste recycling company, Gwrtaith Gwynedd, which piloted the Gritbuster HDS, sees it as a major breakthrough. Every year the company handles over 14,000 tonnes of gully waste and road sweepings on behalf of four major local authorities in North Wales. Harri Parry, the company’s owner says:

“This HDS is just what our industry needs. With landfill tax for trommel fines now at £120 per tonne, the more we can separate out from our waste, the more profitable we are. So it is vital that we extract out everything that can be taxed at the lower rate.”

The Gritbuster HDS has further applications in: aggregate recovery and organics removal; glass washing; and density based material separation. Depending on the nature of feedstock the Gritbuster HDS can process up to 15 to 20 tonnes per hour.

The Gritbuster HDS unit works by separating the lightweight floating materials by the use of an axial flow pump to induce an up flow current within the separation chamber. This upflowing current carries the lighter “float” material up to the water’s surface and onto a mesh conveyer which then carries the lighter materials out of the separator. The water drains through the belt and is recirculated back to the separation chamber via the axial flow pump. Dense particles (that settle faster than the up flow current) drop to the bottom of the chamber where an Archimedes Screw moves the material up an inclined trough.

The Gritbuster HDS is readily transportable, fast and easy to deploy and has a “Plug & Play” design. It can be used either for standalone material processing (with its own recirculating water treatment plant), or, as at Gwrtaith Gwynedd, it can be fully integrated with Siltbuster’s range of Gritbuster washing systems to provide a complete washing and separation solution.

Harri Parry adds: “By combining it with the Gritbuster washing system we think Siltbuster have come up with a total solution for our kind of business.”

Such feedback is welcomed by Dr Richard Coulton CEO of Siltbuster who said: “We pride ourselves on developing technical solutions to waste management issues that are cost effective and simple to install and use. The Gritbuster HDS will not only enhance recycling potential, waste minimisation & landfill diversion it will also significantly reduce waste disposal & associated costs.”