Processing Methods
Non-combustible materials such as glass and metals are removed during the post-treatment processing cycle with an air knife or other mechanical separation processing. The residual material can be sold in its processed form (depending on the process treatment) or it may be compressed into pellets, bricks or logs and used for other purposes either stand-alone or in a recursive recycling process.
Advanced RDF processing methods (pressurised steam treatment in an autoclave) can remove or significantly reduce harmful pollutants and heavy metals for use as a material for a variety of manufacturing and related uses. RDF is extracted from municipal solid waste using mechanical heat treatment, mechanical biological treatment or waste autoclaves.
The production of RDF may involve some but not all of the following steps:
- Preliminary liberation (not required for autoclave treatment)
- Size screening (post-treatment step for autoclave treatment)
- Magnetic separation (post-treatment for autoclave treatment)
- Coarse shredding (not required for autoclave treatment)
- Refining separation
Read more about this topic: Refuse-derived Fuel
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