RT info:eu-repo/semantics/article
T1 Biomethanization of rigid packaging made entirely of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate): Mono- and co-digestion tests and microbial insights
A1 García Depraect, Octavio
A1 Martínez Mendoza, Leonardo José
A1 Aragão Börner, Rosa
A1 Zimmer, Johannes
A1 Muñoz Torre, Raúl
K1 Anaerobic digestion
K1 Biodegradability
K1 Bioplastics
K1 Organic recycling
K1 Packaging
K1 PHBH
AB This study evaluates the anaerobic mesophilic mono- and co-digestion of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) plastic bottles as a proxy for rigid packaging materials. Initial tests showed a 97.3 ± 0.2 % reduction in weight and an observable alteration in the surface (thinning, color fading and pitting) of the PHBH bottles after eight weeks. Subsequent tests showed that PHBH squares (3 × 3 cm) produced 400 NmL-CH4/g-VSfed, at a slower rate compared to powdered PHBH but with similar methane yield. Co-digestion experiments with food waste, swine manure, or sewage sludge showed successful digestion of PHBH alongside organic waste (even at a high bioplastic loading of 20 % volatile solids basis), with methane production comparable to or slightly higher than that observed in mono-digestion. Molecular analyses suggested that the type of co-substrate influenced microbial activity and that methane production was mainly driven by hydrogenotrophic methanogenesis. These results suggest the potential for integrating rigid PHBH packaging into anaerobic digesters.
PB Elsevier
SN 0960-8524
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/73261
UL https://uvadoc.uva.es/handle/10324/73261
LA eng
NO Bioresource Technology, septiembre 2024, vol. 408, 131180
NO Producción Científica
DS UVaDOC
RD 05-feb-2025