22 UNTHA 3
which they operate themselves. Of course this requires capital investment, unless the cost of shredding equipment is spread with a lease agreement. However this provides complete ownership of the data destruction process, and therefore utmost peace of mind. In terms of the best shredding
technique for confidential waste, there is no ‘one size fits all’ answer. Much depends on factors such as the sensitivity of the material, the volume of waste being shredded, desired throughputs and budget. An organisation wishing to
purchase or lease the shredder should therefore make a list of criteria that can be discussed with one or two shredding system manufacturers. The suppliers’ advice and guidance should of course be sought, but it is important not to be swayed from these procurement drivers. When choosing appropriate
technology, our advice is multi- faceted. Given the complex nature of this specialist field, it is important that the supplier demonstrates proven experience, and that its machinery is independently certified to DIN 66399. There are a number of shredding
options in the marketplace. I believe that low maintenance four
September/October 2015
shaft contra-shear cutting systems offer the most proficient solution. Rather than ripping the paper, as faster single shaft shredders do, this technology carefully cuts the material, thus preserving the fibre and maximising the recycling revenue potential. Four shaft machines also ‘mix’ the particles as they shred, which offers increased security when compared to two shaft shredders that simply produce strips. A screen provides added quality control, as it helps produce a defined and homogenous particle size. This upholds data protection responsibilities whilst maximising
the recyclate value of the material. The smaller the particle size, the greater the risk that the quality and value of the recyclate is compromised. However, when handling very high-security information, this may be necessary. In some instances, it is possible to blend the particles with larger fraction, or it may be that the production of briquettes for fuel or animal bedding is the most suitable application. At least some resource value is still being retained. Unfortunately there is no such solution for particles measuring less than 6mm. Experienced waste handlers may also seek additional benefits from any technological investment. It is therefore worth noting that high- torque, slow-speed machines are more energy efficient than single- shaft shredders running at higher speeds, and they are also quieter and present less of a fire risk. This is because they don’t generate as much dust – a common problem when shredding paper – and given they have a lower tip speed, the potential for a spark is also reduced.
Pulp Paper & Logistics
Once the material is shredded,
there are several options for its disposal. If the confidential data has been adequately destroyed, the paper is now just a standard material that can be recycled in the most appropriate manner. The particles could be dropped
straight into a compactor, which keeps everything neat and tidy. A light indicates when the compactor is ready to be emptied, and the material can be collected for recycling. However, baled shredded paper is more valuable. Specialist handling equipment is required of course, but if revenue is a priority this may be justified. Everything depends on the scenario each business faces – this will dictate what particle size the paper must be shredded down to, and whether security obligations, profit margins or waste hierarchy compliance becomes the most important factor. With some clever thinking though, there’s no reason why every box cannot be ticked. Dan Fairest is sales manager of UNTHA UK. Tel: 44 845 450 5388. Website
www.untha.co.uk
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