Evaluation of environmental impacts of an industrial process using virgin and recycled polycarbonate raw material

ABSTRACT

The environmental impacts generated by production processes is a subject that is increasingly evident in the organizational world and the comparative analysis of processes is an effective method used by companies to verify their environmental impacts and main emission sources. The analysis of environmental impacts for a process with two different scenarios to produce Polycarbonate (PC) glasses temples, in an industry located in the region of São Paulo, was performed in order to compare the environmental impacts generated by both scenarios. Thus, two scenarios were defined: scenario 1 represents the injection process that uses 100% of virgin PC as raw material; while scenario 2 uses only 20% of virgin raw material, the remainder PC waste being internally recycled. Quantitative and qualitative data related to the scenarios were collected and used to identify the impacts generated using the life cycle assessment (LCA) methodology. With the results obtained and the comparative analysis performed, it was possible to verify the environmental benefits of using the internal recycling of raw material. The impact reduction in scenario 2, compared to scenario 1, was significant, mainly due to the decrease of the need to produce virgin raw material. There were no reductions in all impact categories analyzed; for example, reduction was over 70% in the “climate change” category.

Keywords:
polycarbonate; recycling; environmental impacts; life cycle assessment