Uncloggable - The New Tana Disc Screener

August 1, 2018 by Waste Management Review

Tana has unveiled a new screener, which the company says has been built for the waste industry and is highly resistant to clogging.


Sorting waste requires durable machines able to handle the wide variety of textures, materials and quantities. To provide a machine capable of handling whatever the waste industry can throw at it, Tana has announced it will be bringing a new product to market.

The Finnish company has unveiled a new mobile disc screen, which it says is capable of screening almost any waste. The new disc screens were introduced at the beginning of March 2017 in Europe, with the machine to be launched in Australia by Tana through their dealer, GCM Enviro.

Kari Kangas, Chief Executive Officer of Tana, says the product has been developed to allow their customers a wider selection of technology when it comes to solid wastes. The product line takes advantage of a collaboration between Tana and EcoStar, leveraging their 20 years of experience in research and development.

The disc screen uses a range of hexagonal, heptagonal or octagonal discs with a patented flat profile. The patented anti-clogging technology prevents material from wrapping around the shaft and clogging the unit. Each machine can be tailor-made for certain applications after screening, with the size, shape and clearance between the discs modified according to the material, ensuring high output and capacity. The technology can be used across all kinds of waste streams, including industrial, municipal solid and construction and demolition waste, as well as resource-derived fuels. It can also be used with recycled wood and green waste, rubber and tyres, metals, slags and ash, separating glass from waste, plastics and PET, compost screening and cleaning or a selection of industrial waste.

The disc screener consists of a series of screening shafts which the discs are inserted into and supported by the frame. An inverter enables the operator to change the speed of the shafts, allowing for adjustments of the particle size to be within 20 per cent above and below. The machine has two variations, a hooklift model and a track drive model, with a compact design allowing it to fit within 1.8 to 2.7 metres instead of the equivalent 4.8 to 5.7-metre space required of a drum screen. Its design also makes it fuel efficient to keep operations costs low.

Waste Management Review contacted a range of companies in the UK who had tried out the new disc screeners. UK company Attero Recycling Ltd currently operates eight Tana Shark shredders and a 6D Drum Screen. The company used the Disc Screen for several days with bulky mixed waste that had passed through a Tana Shark with no screen fitted. “It easily kept up with the throughput of the Shark, estimated to be around 40 tonnes an hour,” a spokesperson for the company says. “We are impressed with the unit and would like to see the machine on another waste stream that we will be trialling soon.”

Similarly, a spokesperson for UK company Trans Waste says the machine was outstanding after comparing the performance with its older EcoStar Screener. It ran the machine on bulky and black bag resource-derived fuels and was able to process around 15 tonnes an hour of the waste through the disc screen with no problem. “The design of the free running covers on the shafts is a great concept which greatly improved the performance of the unit next to the older star screen. It outperformed the older machine by a considerable margin,” the spokesperson says.

LSS Waste Management Ltd, based in Leeds, West Yorkshire, used the machine on its biowood process. The company found the machine stood out next to other screens and when in full use was able to process eight tonnes an hour easily. A spokesperson from LSS says the only thing that limited the pace was how fast they were able to feed the unit and they are very impressed with the machine.