Life cycle assessment on environmental effect of polylactic acid biological packaging plastic in Tianjin

In this paper, corn - based polylactic acid (PLA) biological packaging plastic is selected for the life cycle assessment-LCA. Taking Tianjin, China as an example, the PLA bio-package plastic is analyzed from four aspects: raw material acquisition, processing, use and final treatment. Produce costs, energy consumption, and greenhouse gas (GHG) emissions (equivalent carbon dioxide in this paper) over the entire life cycle of biological packaging plastic were calculated, and compared with traditional petroleum based Polyethylene (PE) plastic products in terms of environmental impacts. Based on LCA results, this paper puts forward corresponding suggestions and countermeasures from the perspective of sustainable development. The study found that the CO2 emissions of biological materials are reduced by 61.25% compared with that of PE.