NEW EARTH OVERSIZE CHALLENGE CASE STUDY
THE CUSTOMER: NEW EARTH SOLUTIONS
New Earth Solutions Group is a waste treatment and renewable energy specialist in the UK. They provide waste treatment services to local authority and commercial customers across the UK, helping them enhance recycling and reduce impact on the environment by diverting waste away from landfill.
New Earth operates a Mechanical Biological Treatment (MBT) facility in Avonmouth, on land adjacent to its Energy Recovery Facility (ERF). The MBT process takes unsorted household, commercial and industrial waste and recovers valuable recyclable materials. Whilst the organic fraction of the residual waste is separated for composting to create a beneficial compost like output (CLO).
In addition to recovering recyclable materials, New Earth’s residual waste treatment facilities are configured to produce refuse-derived fuel (RDF) – a biomass-rich product created from the fraction of the waste that cannot be recycled or composted. Use of RDF in energy recovery plays an important role in the diversion of waste away from landfill disposal and the generation of renewable energy.
The neighbouring energy facility utilises the RDF, diverting it from landfill to generate renewable and low-carbon energy. The result, when the two facilities operate together, is an integrated, ‘closed- loop’ solution to dealing with the region’s residual waste – minimising landfill, maximising recycling and generating renewable and low carbon electricity.
“THE UNIT PROVIDED BY CRJ ACHIEVED AN EXCELLENT LEVEL OF SEPARATION. THE FACT THAT THE UNIT WAS MOBILE ALLOWED US TO TRIAL THE UNIT IN A NUMBER OF DIFFERENT POSITIONS ON SITE UNTIL WE FOUND THE OPTIMUM CONFIGURATION”
Nigel Box, New Earth Site Manager at the Sharpness Recycling Centre
THE CHALLENGE: NEW EARTH SOLUTIONS PRODUCE AN OVERSIZE FRACTION FOLLOWING THE COMPOSTING STAGE AT THEIR MBT FACILITY AT AVONMOUTH.
Disposal routes for the oversize fraction were either landfill or baled for RDF export.
However, despite initial segregation of this material, New Earth wanted to remove and separate the light biomass and plastic fractions that remained in the oversize material with a view to creating further energy and diverting waste away from landfill.
New Earth had conducted an initial trial with a competitors unit but this had not achieved the desired level of segregation. Having previously used CRJ for shredder and screen hire solutions, New Earth Site Manager at the Sharpness Recycling Centre, Nigel Box, contacted CRJ regarding its Ecohog Windsifter.
RJ Services provided a mobile Ecohog Windsifter at New Earth’s site at Sharpness, Gloucestershire where trial work was being conducted.
Nigel Box said “The unit provided by CRJ achieved an excellent level of separation. The fact that the unit was mobile allowed us to trial the unit in a number of different positions on site until we found the optimum configuration”
The mobile unit has now been exchanged for a static, electrically powered, unit which eliminates the necessity to duct the diesel exhaust from the building and increases efficiency on site as time is not being spent refueling and maintaining the engine.
Nigel added, “The adaptability of the unit was also a key factor in the success of the trial, as the speed, distance from drum and angle of the feed belt can all be adjusted at the touch of a button. In addition, the twin fan design gave much better coverage across the full width of the belt which significantly improves separation of the light plastic”.
After successful separation of the light biomass and plastics, these are then used at the New Earth ERF at Avonmouth to create electricity.
New Earth is now working with CRJ to achieve further segregation of the heavy fraction, in particular the non- ferrous metals and rigid plastic. If these fractions can be successfully separated then this will open up an aggregate outlet for the remaining material and thus eliminate the need for landfill.
“THE ADAPTABILITY OF THE UNIT WAS ALSO A KEY FACTOR IN THE SUCCESS OF THE TRIAL, AS THE SPEED, DISTANCE FROM DRUM AND ANGLE OF THE FEED BELT CAN ALL BE ADJUSTED AT THE TOUCH OF A BUTTON”