2026-04-28T19:48:49Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/732612025-01-09T20:06:05Zcom_10324_1173com_10324_931com_10324_894col_10324_1371

00925njm 22002777a 4500 dc García Depraect, Octavio author Martínez Mendoza, Leonardo José author Aragão Börner, Rosa author Zimmer, Johannes author Muñoz Torre, Raúl author 2024 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. Bioresource Technology, septiembre 2024, vol. 408, 131180 0960-8524 https://uvadoc.uva.es/handle/10324/73261 10.1016/j.biortech.2024.131180 131180 Bioresource Technology 408 Biomethanization of rigid packaging made entirely of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate): Mono- and co-digestion tests and microbial insights