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•e <br />WAM <br />Azbh EM <br />Comprehensive Review of <br />NW Solid Waste Collection and Disposal Options <br />0 <br />Exhibit 12 -5. Cross- Section of Typical RDF System <br />Transfer Trailers <br />To Steam Plant <br />Storage <br />eiecrricity <br />Refuse <br />Fired <br />Boller <br />Ash <br />Shredder <br />Air <br />Pollution <br />Control <br />Equipment <br />Magnetic <br />separator <br />oy <br />trQ <br />Shredded <br />Solid Waste <br />0 <br />00 0 0 RO <br />Somew At_associated with RDF facilities are materials processing facilities, which include size <br />reduction, screening and recovery systems, and then additional equipment to reduce the moisture <br />in the resulting RDF to improve its heating quality. For example, in the Cheintex- Entsorga <br />HEBTOT process ("high efficiency biological treatment") an aerobic digestion module is utilized <br />to drive off the moisture from waste that has been shredded. This volume reduction technique <br />reported reduced the incoming waste by 80% with the retraining 20% being disposed of in a <br />landfill. In essence, except for this latter function, this process is very similar to "dirty" <br />materials processing facilities used for volume reduction at many front -end processing facilities <br />at RDF facilities. In Europe, there is a substantial market for such mechanical biological <br />treatment plants offered by Ensorga, which has been driven by the European Union's Landfill <br />directive that restricts the landfilling of biodegradable waste and stipulates a pre - treatment of <br />MS W. Many of these facilities are co- located with cement mills, RDF power plants, or even <br />coal -fired power plants. <br />Common disadvantages associated with such mechanical biological treatment plants include: <br />• Noise and odor associated with the dirty MRF processing; <br />v2.1 T 65 T 0/22/ T 2 <br />