Biodegradação de polipropileno recilado (ppr) e de poli (tereftalato de etileno) reciclado (petr) por Pleurotus ostreatus

Plastics such as polypropylene (PP) and poly (ethylene terephthalate) (PET) are produced from oil are nonrenewable sources and take many years to disappear from the environment where they are deposited after use. Fungi of the genus Pleurotus, by having a single enzyme complex, which enables them to degrade lignocellulosic materials have been widely studied. These fungi in addition to possessing nutritional properties have applications in bioremediations such as 2, 4-dichlorophenol biodegradation of poly (ethylene terephthalate), and polyurethanes. In this work, we studied the biodegradation of polymers PP and recycled PET (PrP, PETr) by Pleurotus ostreatus DSM 1833 in a solid farming, using the POL culture medium without glucose. The PPR and PETr polymers in the form of flakes and pellets, respectively, were deposited on Petri plates containing the culture medium. Previously pasteurized plates were inoculated with mycelium of P. ostreatus and incubated at 30 °C. The characterization of the polymers was made by the test mass loss (%) and the curves of differential scanning calorimetry (DSC). After 45 days of biodegradation PETr presents the 3.3% mass loss while the PrP was 0.3%. With regard to the curves obtained from DSC crystallinity ((_c) polymers had the following values: for PETr biodegraded in 45 days was 13%, while the abiotic control was 29%. Since the PrP C (_c was 31% in the control abiotic 45 days and increased to 35% in the biodegradation test.

biodegradation; polypropylene; poly (ethylene terephthalate); Pleurotus ostreatus.