Influência do tipo de coleta (comum ou seletiva) na reciclagem de filmes de poliolefinas pós-consumo
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Data
2008-01-01
Autores
Mancini, Sandro D. [UNESP]
Nogueira, Alex R. [UNESP]
Kagohara, Dennis A. [UNESP]
Schwartzman, Jonas A. S. [UNESP]
Mattos, Tânia de [UNESP]
Rosa, André H. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Associação Brasileira de Polímeros
Resumo
Filmes de polipropileno (PP) e de polietilenos de alta (HDPE) e baixa densidades (LDPE) foram estudados avaliando-se a presença de impurezas e o efluente da lavagem de seus resíduos provenientes tanto de coleta comum (resíduos misturados) quanto seletiva (resíduos separados). Os resultados apontam que os filmes estavam impregnados com, no mínimo, 30% de impurezas quando provenientes de coleta comum e com, no máximo, 10% quando de coleta seletiva. Esses resultados, associados aos da turbidez do efluente de lavagem, indicam que dos filmes de coleta seletiva, preferidos pelos recicladores, se obtém pelo menos 20% mais material e tem-se uma lavagem mais fácil, por envolver praticamente só a retirada de sólidos, ao contrário da coleta comum, associada a resíduos úmidos impregnados. Os efluentes foram também avaliados segundo sólidos totais, sólidos sedimentáveis e o teor de nove metais. Os resultados indicaram que os dois tipos de coleta geram efluentes semelhantes e que no máximo duas etapas devem ser suficientes para seus tratamentos: decantação e diluição do efluente no corpo d'água receptor.
Polypropylene (PP), high density polyethylene (HDPE) and low density polyethylene (LDPE) films were studied according to the way their wastes are collected (segregated from or mixed with other residues) by evaluating the amount of impurities and the washing wastewater. It was found that the films from mixed collection presented at minimum 30% of impurities, while the films from segregated (or curbside) collection presented at maximum 10% of impurities. The amount of impurities and the wastewater turbidity indicated that 20% more material can be obtained from the films of segregated colletion, preferred by recyclers, in addition to having a simpler washing process because it only involves solids removal, unlike mixed collection which is associated with the impregnation of wet wastes. The effluents were also evaluated according to the total amount of solids, sediments and concentration of nine metals. The results showed that both types of collection generated similar wastewaters and their treatment requires two steps at the most: sedimentation and effluent dilution in the water body.
Polypropylene (PP), high density polyethylene (HDPE) and low density polyethylene (LDPE) films were studied according to the way their wastes are collected (segregated from or mixed with other residues) by evaluating the amount of impurities and the washing wastewater. It was found that the films from mixed collection presented at minimum 30% of impurities, while the films from segregated (or curbside) collection presented at maximum 10% of impurities. The amount of impurities and the wastewater turbidity indicated that 20% more material can be obtained from the films of segregated colletion, preferred by recyclers, in addition to having a simpler washing process because it only involves solids removal, unlike mixed collection which is associated with the impregnation of wet wastes. The effluents were also evaluated according to the total amount of solids, sediments and concentration of nine metals. The results showed that both types of collection generated similar wastewaters and their treatment requires two steps at the most: sedimentation and effluent dilution in the water body.
Descrição
Palavras-chave
Reciclagem, filmes plásticos, coleta seletiva, polietileno, polipropileno, tratamento de efluentes industriais, Recycling, plastic films, curbside collection, polypropylene, polyethylene, industrial wastewater treatment
Como citar
Polímeros. Associação Brasileira de Polímeros, v. 18, n. 4, p. 289-296, 2008.