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Sort it out…with cost-effective compressed air

11 November 2010

When Veolia Environmental Services developed a purpose built Materials Recovery Facility (MRF) it opted for a Boge SF series frequency controlled screw compressor to power the optical sorting devices.

Veolia Environmental Services operates the facility on behalf of Nottinghamshire County Council. Up to 1,350 tonnes of household waste - such as plastic bottles, paper and cans - are sorted and baled every week, using a mixture of manual and automated sorting technology. Nearly all of the rubbish that comes into the facility is passed on and is eventually recycled.

Compressed air is used to sort the rubbish. The main job of compressed air within the facility is to power the four optical sorting devices. These units reflect light off the waste as it passes under it on a conveyor belt and identifies the size, shape and type of material. With the use of 64 air jets the waste items are then blown onto various conveyor belts for further processing.

Veolia specified a Boge SF 150 frequency controlled screw compressor to meet its estimated compressed air requirements in the most energy-efficient manner.

The Boge SF series frequency controlled screw compressors work in accordance with the compressed air demand by producing the exact volume of compressed air at the pressure required. Frequency control minimises idling time and evens out air demand fluctuations. For Veolia this ensures that only the most economical and efficient use of the compressed air is produced regardless of peak or off-peak air demands or fluctuations in recycling levels.

Commenting on the chosen compressed air solution, Mick Mason, Maintenance Manager at the facility, said: “The Boge SF 150 continues to work efficiently and reliably, assisting us in sorting up to 85,000 tonnes of Nottinghamshire’s recyclable rubbish per year.”

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