Recovery of PET from packaging plastics mixtures by wet shaking table.
Recycling requires the separation of materials appearing in a mass of wastes of heterogeneous composition and characteristics, into single, almost pure, component/material flows. The separation of materials (e.g., some types of plastics) with similar physical properties (e.g., specific gravity) is often accomplished by human sorting. This is the case of the separation of packaging plastics in municipal solid wastes (MSW). The low cost of virgin plastics and low value of recycled plastics necessitate the utilization of low cost techniques and processes in the recycling of packaging plastics. An experimental study was conducted to evaluate the feasibility of production of a PET product, cleaned from PVC and PS, using a wet shaking table. The wet shaking table is an environmentally friendly process, widely used to separate minerals, which has low capital and operational costs. Some operational variables of the equipment, as well as different feed characteristics, were considered. The results show that the separation of these plastics is feasible although, similarly to the mineral field, in somewhat complex flow sheets.
Carvalho
M T
MT
CVRM - Centro de Geosistemas, Instituto Superior Tecnico - Av. Rovisco Pais, 1049-001 Lisbon, Portugal. teresa.carvalho@ist.utl.pt
Agante
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E
Durão
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D010969:Plastics / Q000737:chemistry*; D011093:Polyethylene Terephthalates / Q000302:isolation & purification*; D011137:Polystyrenes / Q000737:chemistry; D011143:Polyvinyl Chloride / Q000737:chemistry; D019064:Product Packaging; D012037:Refuse Disposal / Q000295:instrumentation*
D010969:Plastics; D011093:Polyethylene Terephthalates; D011137:Polystyrenes; D011143:Polyvinyl Chloride