PRODUÇÃO DE COMBUSTÍVEL A PARTIR DE RESÍDUOS DE EMBALAGENS TETRA PAK EM LEITO FLUIDIZADO: IDENTIFICAÇÃO DE FATORES QUE AFETAM A MISTURA DE PARTÍCULAS DE AREIA E COMPÓSITO PEBD/AL

Rotas integradas pirólise catalítica e refino possibilitam a conversão de poliolefinas proveniente de resíduos de embalagens cartonadas pós-consumo em combustíveis e produtos químicos de interesse comercial. Essa tecnologia contribui para a redução dos impactos ambientais decorrentes do descarte inadequado desses resíduos. Além disso, a recuperação do compósito PEBD/Al (polietileno de baixa densidade e alumínio) via pirólise permite a obtenção de produtos com altos valores agregados, tais como a parafina e alumínio com alto teor de pureza. A originalidade desta pesquisa deve-se ao desenvolvimento de uma coluna cilíndrica de leito fluidizado com um sistema de guilhotinas. A inserção de um sistema de guilhotinas a coluna cilíndrica permite avaliar a concentração axial de partículas de compósito PEBD/Al. Além disso, esta pesquisa visa investigar o efeito da velocidade de injeção do ar e da fração mássica de compósito PEBD/Al sobre o índice de mistura de partículas (Im), mediante a um planejamento experimental 3². Sob o ponto de vista da mistura de partículas no leito, a análise de resultados indica que a produção de combustível a partir de poliolefinas pode ser favorecida quando o reator é empregado com velocidade ar 25 % acima da mínima fluidização.

REMOVAL OF POTENTIALLY TOXIC METALS FROM AQUEOUS SOLUTION USING TETRA PAK INDUSTRIAL WASTE AS BIOSORBENTS

Potentially toxic metals (PTMs) contamination in the water bodies had been a worldwide challenge. Industrialization and anthropogenic activities have produce and discharge wastes comprising organic and inorganic pollutants into the water resources making them hazardous and threatening human health and the environment. Packaging technology for food and beverages such as juices, milk, and other liquids using paper packets, generally known as Tetra Pak, has resulted in the generation of too much waste in the world in recent decades. On the one hand, it appears that the building of composites from Tetra Pak trash allows for maximum recycling of these materials, while on the other hand, the inclusion of Kraft paper, Al, and polyethylene in the packet composition can improve the functional features of the goods. Tetra pak packaging is comprised of three different types of raw materials: cellulose (75 %), low density polyethylene (LDPE) (20 %), and aluminium (5 %).The present research aimed to assess the potential of Tetra Pak industrial waste as biosorbents to remove PTMs such as lead (Pb), Nickle (Ni), and Copper (Cu) from PTMs-artificial contaminated water. Approximately, 0.05 mg/L concentration for Ni, 0.027 mg/L for Pb, and 0.05 mg/L for Cu were artificially added in the water bodied to assess the adsorption efficacy amended with two samples of waste Tetra Pak OTP (sample product1) and DOTP (sample product 2) as biosorbents. The obtained results showed that the maximum Ni adsorption recovery was received by (83 % with DOTP), Pb 52 % with OTP and Cu 32 % with OTP as bio-sorbent amendments. Overall, the present study indicated that the remove of PTMs from dilute aqueous solutions and using industrial waste material as easily available and low-cost sorbent, that can be successfully used to remove pollutants from multi-metal polluted water.