Prospective LCA to provide environmental guidance for developing waste-to-PHA biorefineries
نویسندگان
چکیده
Polyhydroxyalkanoates (PHA) production from waste streams using mixed microbial cultures (MMC) can unlock the potential of PHA to substitute oil-based plastics. However, these processes are still at low technology readiness level (4–6). Demonstrating a better environmental performance would boost their deployment industrial scale. Hence, including guidance during development, when there opportunities for major alterations, is essential. To best our knowledge, this work elucidates first time how waste-to-PHA biorefineries could develop in future by combining prospective LCA with scenario methodology and where attention stakeholders should be focused. Four scenarios were derived considering both surrounding (e.g., scale, or bioeconomy policies) technological parameters acidification yield, content biomass recovery yield). Those under ambitious policies shop up 50% lower impacts than those business-as-usual policies. These differences caused different background processes’ burdens electricity mix renewable energies share) higher consumption chemicals utilities. yields partially mitigated valorizing intermediate into biogas. Sensitivity analysis results pointed out yield as that influence most performance, being responsible 60% variance performance. determine utilities downstream processing, which confirmed main hotspot. This goes beyond previous studies on quantifies
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ژورنال
عنوان ژورنال: Journal of Cleaner Production
سال: 2023
ISSN: ['0959-6526', '1879-1786']
DOI: https://doi.org/10.1016/j.jclepro.2022.135331