SRF (Solid Recovered Fuel) is a fuel produced by shredding and dehydrating solid waste, typically consisting of combustible components of municipal solid waste (MSW) such as;
- Biodegradable waste; food and kitchen waste, green waste, paper.
- Recyclable material; paper; glass, bottles, cans, metals, certain plastics, fabrics, clothes, etc.
- Inert waste; construction and demolition waste; dirt, rocks, debris.
- Composite wastes; waste clothing, Tetra-Packs, waste plastics such as toys, garden furniture etc.
Most definitions of MSW do not include;industrial waste, agricultural wastes, hazardous waste, medical waste, radioactive waste or sewage sludge.
SRF (Solid Recovered Fuel) processing facilities are normally located near a source of MSW and, while an optional combustion facility is normally close to the processing facility, it may also be located at a remote location. Currently most UK produced SRF (Solid Recovered Fuel) is exported.
SRF (Solid Recovered Fuel) is produced to reach a standard such as CEN/343 ANAS.
How is SRF (Solid Recovered Fuel) produced?
The materials used to produce SRF (Solid Recovered Fuel) pass through a series of shredders, screens, air classifiers/density separators and magnets. Inert materials, recyclable plastics and metals are extracted from the shredded material, leaving a mix of mainly non-recyclable paper, card, wood, textiles and plastic. Although a small proportion of these materials can be recycled the quality of these materials is compromised once they enter the residual waste stream and recovering energy from these materials is currently the best environmental option.
The production of SRF (Solid Recovered Fuel) may involve some but not all of the following steps;
- Preliminary liberation/sorting
- Course, pre-shredding
- Size screening
- Magnetic separation
- Refining separation
- Fine, secondary shredding
- Baling & wrapping
SRF (Solid Recovered Fuel) is shredded to between zero and 30mm, and can be blended to meet the exact fuel specifications requested by customers. It can be delivered loose or baled-and-wrapped so it can be bulk-shipped or stored.
VIDEO OF AN M&K SRF MANUFACTURING PLANT
SRF (Solid Recovered Fuel) is a ‘Zero to Landfill’ fuel – even the ash that is produced, as a by-product of burning the fuel, is used in the cement production process to replace natural aggregate.