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Life cycle assessment of plastic waste and energy recovery
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Researchers investigated the vertical distribution of microplastics in open ocean water columns at stations across the North Atlantic, finding that particle concentrations were highest in subsurface waters rather than the surface mixed layer. Biofouling and association with marine snow were identified as mechanisms driving downward flux of buoyant polymers in the water column.
Plastics are essential in our economy and everyday life. However, plastic pollution is a global concern. To address this issue, the European Strategy for Plastics in a Circular Economy was adopted in January 2018. Attention has been raised to the entire life cycle of products, with legislation stating that plastic used throughout the design phase to manufacturing and packaging phases needs to be recyclable by 2030. This study evaluates selected plastic material categories and technologies carrying out a review of Life Cycle Assessment (LCA) analysis from literature. The literature review was carried out, the indicator units for impact categories among the investigated mid-point methodologies as well as the conversion factors for the metrics harmonization were provided and finally a detailed analysis of the environmental impact of several types of plastics was carried out for two options in the waste hierarchy, which are through disposal by sending waste to landfills and incineration with energy recovery. The disposal, treatment and recycling of 2.2 tonnes of general plastic waste including non-recyclable material delivered to a recycling facility was considered for comparison with these methods. An assessment of the comparative advantages of each practice was conducted. The potential for energy recovery was highlighted.
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