RT Journal Article
T1 Prospective LCA of future pathways for used cooking oil valorisation: advancing renewable energy and sustainable materials
A1 Vázquez Vázquez, Brais
A1 Hospido Quintana, Almudena
A1 Val del Río, Ángeles
A1 Janssen, Matty
K1 Stakeholders
K1 Polyhydroxyalkanoate
K1 Bioplastics
K1 Biodiesel
K1 Cogeneration
K1 Incineration
AB PurposeThis study aims to evaluate the environmental performance of different valorisation pathways for used cooking oil (UCO). By applying prospective life cycle assessment (pLCA), conventional energy-based routes, such as biodiesel production, cogeneration, and incineration; were compared with novel materials routes such as bioplastic production using PRETENACC technology (TRL = 5). The analysis focuses on identifying the most environmentally favourable long-term option, emphasizing how increasing the market share of bioplastics could shape future UCO recovery strategies.MethodsAs the first step of the pLCA, more than 30 parameters related to UCO valorization were identified together with stakeholders with expertise in political, environmental, social, technological, economic and legal (PESTEL) fields. These were used to generate five future scenarios for 2030, 2040 and 2050. Life cycle inventories were developed using experimental and literature data on bioplastics, as well as data from the literature on energy pathways, covering the system boundaries from cradle to grave. The background processes were futurised with Ecoinvent 3.9.1 and scenarios based on IMAGE (SSP2-base and SSP2-RCP2.6). Environmental impacts were quantified using the intermediate categories of ReCiPe 2016, supplemented with indicators of the physical effects of microplastics on terrestrial and aquatic biota.Results and discussionThe pLCA results show that scenario 1 (0% market share for bioplastics) has the lowest initial impacts (2030). Nevertheless, over time (2040 and 2050), only the environmental burden of bioplastics decreases, driven by cleaner electricity production and better waste sorting. Climate change impacts are largely influenced by bioplastics production and end-of-life (EoL) management, with mixed waste disposal accounting for up to 26% of the total impact in 2030, decreasing towards 2050. Terrestrial acidification is dominated by the bioplastics production. Particle formation reflects combustion-related trends, while microplastic impacts depend on poor management, which mainly affects marine environments as the final sink. Energy recovery pathways show limited potential for improvement, while bioplastics offer increasing long-term environmental benefits if appropriate EoL pathways are followed.ConclusionsThis study demonstrates that while energy recovery pathways, such as biodiesel, cogeneration, and incineration, contribute marginally to long-term environmental improvements, material valorisation through bioplastics offers a promising and more sustainable UCO management route. Environmental performance of bioplastics is highly dependent on EoL management and the polymer composition. Enhancing waste sorting practices and adopting lower-impact polymer blends are critical to maximizing benefits, enabling a significant reduction in the impacts associated with bioplastics.
PB Springer
YR 2026
FD 2026-03-17
LK https://hdl.handle.net/10347/46876
UL https://hdl.handle.net/10347/46876
LA eng
NO Vázquez-Vázquez, B., Hospido, A., Val del Río, Á., & Janssen, M. (2026) Prospective LCA of future pathways for used cooking oil valorisation: advancing renewable energy and sustainable materials. The International Journal of Life Cycle Assessment, 31(47). https://doi.org/10.1007/s11367-026-02625-0
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was financially supported by the ECOPOLYVER project (Ref. PID2020-112550RB-C21), the POLYGO1 project (Ref. TED2021-130164B-I00), and by CRETUS, which supported Brais Vázquez-Vázquez’s research stay at Chalmers University of Technology. Brais Vázquez-Vázquez, Ángeles Val del Río, and Almudena Hospido belong to a Galician Competitive Research Group (GRC ED431C 2025/19) and CRETUS Research Centre (ED431G 2023/12).
DS Minerva
RD 9 may 2026