Shredders are the ideal machines for processing this type of waste. When choosing a shredder you need to match the size and productivity of the equipment to the volumes of waste and consider how mobile the unit needs to be. You also need to think about how the machine is best powered.
Driven by need, the market has seen a number of new shredders and chipper/shredder combinations introduced in the last 12 months. There is something for everyone — from the local authority needing to process large quantities of waste to the small business undertaking garden maintenance and looking to shred on site.
New models on the market
Last year, Warwickshire-based chipper/shredder manufacturer Greenmech brought an “at source” shredding solution to the local-authority market. Shredderman is a development of the company’s well-established Eco Combi system and enables household green waste to be processed at the home owner’s premises.
Capable of chipping material up to 150mm and shredding up to 50mm in diameter, Shredderman will tackle all forms of green waste including that contaminated with soil and stones. The Combi, mounted onto a pick-up truck, has been modified to incorporate a cyclone to eliminate most of the normal air blast and enable processed material to be loaded straight into bin bags or wheelie bins at the roadside. The material can then be returned to the householder for re-use in the garden.
Trials of the Shredderman by Redditch Borough Council show that an average of five to 10 bags of about 22kg each are processed from each household. Good route planning enables an average of two households per hour which, even at five bags per household, should enable in excess of 6,000kg of green waste to be processed per week. Not only can the unit help local authorities meet their green-waste recycling targets, but there is also a considerable reduction in disposal costs at landfill.
At the 2005 Royal Show, Lincoln-based Gannon UK launched the Shred-All 5600 shredder to cover the needs of local authorities, foresters, contractors and the hire sector. The unit will tackle pallets and some timber waste, as well as grinding green waste and forestry waste up to 250mm in diameter.
Designed so it can be towed by a tractor or small truck, the Shred-All features a discharge conveyor that can be stowed under the unit for transport through urban or tree-dense areas. The unit weighs six tonnes and is priced around £78,000. An optional colouring unit, costing £8,000, can be fitted to colour wood chip for mulch.
The range of Eliet professional chipper/shredders from Pinnacle Power Equipment has been expanded with the addition of the Mega Prof. Powered by a 26.5hp Briggs & Stratton water-cooled, diesel engine, this unit can deal with green waste up to 150mm in diameter. The chute on this machine hardly tapers, so prunings should feed in with little trimming, and an integrated conveyor carries the waste to the cutting drum. Just 90cm wide, the Mega Prof can gain access through standard gateways. Price is £14,000 excluding VAT.
Joining Pinnacle’s Mega Prof this month is the Ultra Prof. Fitted with 24hp Honda or 22hp Briggs & Stratton engine, the Ultra chipper/shredder has a cutting system comprising six discs and 24 knives to make short work of material up to 140mm in diameter.
New from Arbor Eater Brushwood Chippers of West Sussex is the Bio 190. This new-generation shredder combines different systems for the shredding of organic and vegetable waste. It has single-feed opening and a double chip/shred system with grid refining to sieve the end product to the required grade.
The first part of the system is designed to cut wooden or fibrous products, the second part comprises hammers to reduce leaves, prunings and kitchen waste. There is a choice of electric or petrol-engine powered units, plus a model for running from a tractor power-take-off system.
Where noise is an issue, or for garden landscapers needing small, lightweight equipment that can be easily lifted in and out of the van, top of the range domestic shredders can prove useful. Launched in autumn 2003, the Viking GE250was last year combined with the GE150 chipper accessory to allow the shorter feed chute and chipping blade to be added to the GE250 to give extra functionality and capacity.
Branches up to 35mm in diameter can be fed through the patented cloverleaf aperture to blades of a noise-absorbing sandwich construction. Sound proofing is also afforded by the feed chute. At the shredder end of the GE250, a large funnel is designed to take volumes of waste for processing via a blade disc that incorporates an anti-kickback “pre-shredder” to grab the material and direct it onto the sharper shredding blades.
At the heart of the GE250 is a 2.5kW electric motor. Controls are via a glove-friendly keypad and safety features include a switch-off device to prevent machines restarting automatically after power failure. There is also an electro-mechanical safety lock to prevent start-up when the housing is open.
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