Kent-based Fercell Engineering has been helping AmeyCespa’s Waterbeach MBT plant turn its waste into a revenue stream with two Weima PowerLine single shaft waste shredders. Bruce Le Gros explains how
AmeyCespa provides recycling, composting, anaerobic digestion and waste management services. It combines the expertise of public service provider Amey and Cespa, Spain’s major waste management company that has over 40 years of expertise in the field.
In Waterbeach, located only a few miles north of Cambridge, two WeimaPowerLine single-shaft waste shredders have been recently installed. They are used for secondary shredding in the Mechanical Biological Treatment (MBT) plant.
It’s always rush hour at the AmeyCespa recycling centre in Waterbeach – every single day. A constant stream of municipal waste collection vehicles disgorge load upon load of waste collected from around the famous university town of Cambridge.
Kent-based Fercell Engineering, in partnership with Weima Germany, are turning this waste into revenue with the power of the Weima PowerLine single shaft shredder series.
AmeyCespa is able to feed up to three pre-shredders, shredding the pre-sorted material to a size that is able to be processed. The next phase is to remove all foreign materials such as stones, aggregate, film, metal and wood. To achieve this, state-of-the-art wind-sifters, ballistic separators, metal detectors and drum screens divide the shredded material into several fractions.
The light fractions, consisting of paper, film, foam and small organic pieces, are delivered to the two Weima PowerLine shredders by conveyor belt. The resultant material stream is then shredded to the optimal size and conveyed to the warehouse next door. There, the shredded material can be carried away after drying.
The high output and flexible universal shredders weigh in at approximately 25 / 35 tonnes and shred the material to a size of 100mm, using a special PowerLine rotor holding 80 x 80mm cutting knives and a hard wearing vautid coating for maximum protection.
Both machines are equipped with hydraulic drive (160/255 kW performance) representing a strong drive option for Weima size reduction machinery. It features a simple design, offering an extremely high torque potential. This enables these machines to be driven at lower kW-rated motor, saving considerable operating costs. Moreover, they assure an interruption-free and low-maintenance operation.
The hydraulic drive provided full torque from zero to maximum speed in both forward and reverse, and speed control from zero to full speed. In comparison to electromechanical drives with gears, hydraulic drives are extremely resistant to foreign bodies. With their built-in overload protection, they resist both constant shock loads and stalling conditions. This safeguards not only a shredder’s components, but also reduces downtime while increasing reliability.
When the material stream has been shredded to the optimal size, it is further conveyed to the warehouse next door, which is about the size of three football fields. There, the shredded goods can be carried away after drying.