D J Laing is one of the UK’s pioneering wood waste recycling specialists and was among the first in the UK to recognise the benefits of Doppstadt chippers and shredders as an integral part of their woodwaste treatment processing plants. Having purchased their first Doppstadt LK330 shredder some 15 years ago, the company has retained a Doppstadt in their specialised equipment fleet ever since. “We’ve looked at a number of competitive shredders over the years, particularly from the USA“ says Managing Director David Laing “but have remained loyal to Doppstadt and distributors Blue Scotland throughout. Doppstadts are reliable, productive and meet our high quality 40mm wood chip product the end user demands. The after sales product support from Blue has been very good, coupled with a team of skilled mobile fitters, and cements our ongoing future business relationship”. D J Laing has recently taken delivery of their fifth Doppstadt, a Doppstadt DZ-750 Kombi combination slow- and high-speed shredder from Blue Scotland, which is now the main woodwaste processor at the company’s Petterden Recycling Centre.
DJ Laing was established in 1975, with the initial start up focussed on plant hire and general contracting. The diversification into waste management in the early 1990’s has seen a planned and programmed expansion of the specialised plant and equipment - shredders, crushers, screeners etc - alongside a continued investment in modern vehicles, processing and materials handlers to ensure best practice and optimum reclamation of reusable products, minimising landfill and maximising recycling and reuse. In addition to processing plant and equipment, DJ Laing also operates a large fleet of heavy goods vehicles and over 800 skips and containers for raw waste material collection from a variety of sources throughout Angus, Tayside and Fife.
At the Petterden Recycling Centre, collected waste is pre-sorted prior to entering the woodwaste processing stream where a combination of Doppstadt shredder, eddy current separators and screeners treat the incoming waste wood. The sorting operation ensures that pallet, packaging and virgin timber woodwaste for the “Grade A” end-product is separated to ensure clean, high quality 40mm chip for board production. Second grade woodwaste is treated as a separate waste stream to produce biofuel material. A bi-product of both processes is -6mm fines cattle bedding which is screened out and stockpiled for use in the agricultural sector. Currently, the recycling plant is producing around 500 tonnes of reclaimed material per week although the potential output is in excess of 1000 tonnes, which will allow any expansion and future increases in volumes to be handled with ease.
The Doppstadt DZ-750 Kombi is a mobile shredder combining slow pre- and fast fine-shredding, the latter featuring a selector switch to turn this function off should it not be required for a specific waste stream. Integral twin overband magnets, for tramp metal removal, hard metal flail tips, an hydraulically controlled fine shredding comb (40-280mm grate size) and a remote control are all standard equipment. The drive unit is rear-mounted for easy maintenance access and the slewable cooler features a large reversible self-cleaning fan wheel. Tools, flail tips and the fine shredding basket are easily replaceable. The versatile DZ-750 Kombi was chosen by DJ Laing because it is specifically designed and built for the shredding of woodwaste and is also ideal for the production of biofuels.