Sordisep: sorting-digestion-separation of restwaste
1999
Boelens, J. | Smis, J. | Baere, L. de (Organic Waste Systems NV, Gent (Belgium))
New opportunities are arising for the treatment of grey or mixed waste by biological means. A combination of SORting-DIgestion-SEParation (SORDISEP) allows the recovery of energy in the form of biogas together with the recovery of clean and recyclable products. Dry sorting is applied to recover a high-calorific RDF fraction, metals as well as inerts. Digestion produces energy in the form of biogas and converts about 60/ of the organics. Sand, fibers, metals, inerts and a sludge can be more efficiently separated after digestion from each other and cleansed by washing in order to produce an end product that is clean and marketable and conforms to market standards. Heavy metal standards for compost can be reached after the fibers and sludge are treated for removal of heavy metals. Total recovery is about 54/ of the waste or 67/ with heavy metal removal as products that can be recycled immediately. Other fractions can be thermally treated. The final landfill fraction, excluding the ashes, is less than 6/ of the incoming waste stream. The dry sorting and dry digestion have been proven on a large scale in a grey waste treatment plant in Bassum, where on average 142 cubic Nm of biogas is recovered per ton of organic fraction in the digester.
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Эту запись предоставил University of Liège