Our Facilities will use state-of-the-art materials sorting technology and Advanced Thermal Treatments such as Gasification.
Phase One: Waste Delivery
Vehicles delivering waste to the Plants enter the Waste Reception building before unloading into a pit and hopper. During the unloading of waste, fast acting roller shutter doors will be closed when vehicles are inside the building to ensure that noise and odour emissions do not escape. Doors remain closed except during vehicle entry or exit.
Phase Two: Materials Sorting
- Waste is fed into the materials sorting technology which is used for the separation of recoverable materials from those which cannot be recovered in their material form – known as the residual stream.
- Various methods are used to sort and separate the materials, including screen, drums, air jets, optical devices and even by hand.
- The residual material, which otherwise would be sent to landfill, will be shredded to give material suitable for use as a feedstock, known as Refuse Derived Fuel (RDF) for the Advanced Thermal Treatment Plant.
- Recyclable materials sorted during the process are bulked up and transferred to dedicated recycling centres offsite.
Phase Three: Advanced Thermal Treatment (Gasification)
- 'Advanced Thermal Treatment can consist of various processes and Drenl will choose the most suitable processes for the wastes concerned. Where pyrolysis or gasification is used, the processed residual waste is heated so that its molecular structure breaks down to produce a gas called “syngas”. Gasification is an established, proven technology already used both in the UK and Europe; approved by the Department of Energy and Climate Change (DECC).'
Phase Four: Making electricity
- The syngas is then burnt and the hot gases used to create steam. The steam is used to turn the turbines to generate electricity.
Phase Five: What’s left?
- The flue gases then passed through a gas cleaning system to absorb and remove the small amounts of unwanted substances. It is then passed through a filter before being released into the atmosphere whilst continuously monitored and nationally regulated.
The remaining by-product, known as ash, can be recycled for use in road foundations and other construction based materials.
The facility will be operated under strict international environmental and regulatory guidelines.