Suchergebnisse

In an endeavor to make Europe carbon-neutral, and to foster a circular economy, improving food waste management has been identified by the European Union (EU) as a key factor. In this study, we consider 21 pathways, covering: (i) prevention; (ii) reuse for both human consumption and animal feed; (iii) material recycling as an input into the food and chemical industries; (iv) nutrient recycling; and (v) energy/fuel recovery. To include all types of impact, a sustainability assessment, encompassing environmental, economic, and social pillars, is performed and complemented with societal life cycle costing. The results indicate that after prevention, reuse for human consumption and animal feed is the most preferred option, and, in most cases, nutrient recycling and energy recovery are favored over material recycling for chemical production. While highlighting that the food waste management hierarchy should be supported with quantitative sustainability analyses, the findings also illustrate that biochemical pathways should be improved to be competitive despite the fact that food waste valorization has the potential to satisfy the EU demand for the chemicals investigated. Yet, the results clearly show that the potential benefits of improving emerging technologies would still not eclipse the benefits related to food waste prevention and its redistribution.

The Bioeconomy Strategy was launched by the European Union (EU) in 2012 to promote the transition from a fossil- to a bio-based economy. To meet ambitious energy and climate mitigation targets, extensive use of first generation biomass has occurred in the last years incurring environmental, economic, and social concerns in relation to the actual sustainability of the supply and transformation processes. To circumvent these issues, second generation biomass has been often proposed as an alternative and, among the others, biowaste (e.g. from household or industry). According to the biomass pyramid, biomass should first be used to produce high-value products (e.g. pharmaceuticals), and only when the biomass is no longer suitable for the mentioned applications it should be used for fuel and energy purposes. Following policy reccomendations, life cycle thinking should be applied to document the sustainability of bioeconomy pathways. In this study, we focus on biowaste and evaluate sustainability of a variety of utilisation pathways by applying life cycle assessment and life cycle costing. Scenarios are assessed investigating both high- (e.g. animal feed production) and low-value products (e.g. energy recovery from incineration). The results obtained are expected to fill the research gap with respect to economic and social assessment of second generation biomass usage, and to assist decision makers in deciding the best application of the mentioned biomass.