Back to clients H. Brown & Son Recycling Long-standing UNTHA customer H. Brown & Son Recycling has invested in a new UNTHA shredder, switching from an XR to a ZR. The Stoke-on-Trent based waste management firm has used UNTHA shredding technology within its alternative fuel production plant for over a decade. But following the launch of the new ZR pre-shredder, last Autumn, Browns will switch out its trusty XR, after 11 years of operational service. The new machine will process the same variety of input materials – a multifaceted mix of commercial, industrial and other bulky wastes – transforming them into a 200mm fuel for UK Waste to Energy conversion.