Recovery of plastic wastes from dumpsite as refuse-derived fuel and its utilization in small gasification system
2010
Chiemchaisri, Chart | Charnnok, Boonya | Visvanathan, C.
An effort to utilize solid wastes at dumpsite as refuse-derived fuel (RDF) was carried out. The produced RDF briquette was then utilized in the gasification system. These wastes were initially examined for their physical composition and chemical characteristics. The wastes contained high plastic content of 24.6-44.8%, majority in polyethylene plastic bag form. The plastic wastes were purified by separating them from other components through manual separation and trommel screen after which their content increased to 82.9-89.7%. Subsequently, they were mixed with binding agent (cassava root) and transformed into RDF briquette. Maximum plastic content in RDF briquette was limit to 55% to maintain physical strength and maximum chlorine content. The RDF briquette was tested in a down-draft gasifier. The produced gas contained average energy content of 1.76MJ/m³, yielding cold gas efficiency of 66%. The energy production cost from this RDF process was estimated as USD0.05 perkWh.
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