Banca de DEFESA: JOAO GABRIEL MACHADO DE AVELLAR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOAO GABRIEL MACHADO DE AVELLAR
DATE: 29/07/2024
TIME: 14:00
LOCAL: Programa de Pós-Graduação em Ciência de Materiais
TITLE:

BIODEGRADATION OF POLY(ETHYLENE TEREPHTHALATE) WITH ORGANIC PRO-DEGRADANT UNDER ANAEROBIC CONDITION

KEY WORDS:

biodegradable polymers; PETbio; sludge; anaerobic digestion.

PAGES: 86
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

Single-use plastics have become a significant part of the global economy, with an annual production of 82 million metric tons, which represents almost a fifth of the global plastics market. Alternatives to reduce the durability and resistance to degradation of these materials are explored by the scientific community. However, it is still a need for further studies about the effectiveness of the biodegradation of marketable plastics. The purpose of the study was to evaluate the biodegradability, under anaerobic conditions, of poly(ethylene terephthalate)-Bio (PETBio), known as ECOPHANE, and this material is the film commercialized by the company Terphane. The polymeric films were submerged in sludge from Sewage Treatment Plants, placed in digesters. The quantification of biodegradation was done through the evaluation of the biogas by gas chromatography. In terms of film characterizations, they were submitted to Thermogravimetry, Differential Scanning Calorimetry and Fourier Transform Infrared Spectroscopy. Furthermore, analyses of the microorganisms present in the medium were performed. The results showed an increase in the anaerobic population and a decline in aerobic organisms, while methane gas production reached its peak at the end of the first month and continued to decline thereafter. There were no changes in thermal properties or chemical bonds that could indicate degradation. At eighteen months, there was no difference in biodegradation between the negative control films (PET) and the PETBio films. However, it was possible to identify more significant interactions between the sludge components and the PETbio surface, suggesting signs of initial biofilm formation.

COMMITTEE MEMBERS:
Presidente - 2572606 - GLORIA MARIA VINHAS
Externo à Instituição - SERGIO PERES RAMOS DA SILVA - UPE
Interno - 1354207 - SEVERINO ALVES JUNIOR