2026-05-05T18:33:03Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/726612024-12-17T20:04:44Zcom_10324_35294com_10324_952com_10324_894col_10324_35295

Exploring new strategies for optimizing the production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) from methane and VFAs in synthetic cocultures and mixed methanotrophic consortia Amabile, Claudia Abate, Teresa Marcos Naveira, José Enrique Chianese, Simeone Musmarra, Dino Muñoz Torre, Raúl In this work, the potential of a synthetic coculture and a mixed methanotrophic consortium to synthesize poly(3- hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) from renewable and waste-based feedstocks was assessed batchwise. Methylocystis parvuscocultivated with Rhodococcus opacus and a Methylocystis- enriched culture previously grown on methane were subjected to nutrient starvation in a medium enriched with valeric acid (30% w w−1 of Ctot) or with a VFAs mixture containing acetic, propionic, butyric, and valeric acids (15% w w−1 of Ctot) under a CH4:O2 or air atmosphere. For all test series, pH was adjusted to 7 after adding the cosubstrates, and a negligible substrate consumption or polymer production was considered the end point of the trial. Results showed that valeric acid promoted PHBV accumulation in both cultures regardless of the atmosphere. Interestingly, the mixture of VFAs supported PHBV accumulation only in the presence of methane. The highest PHBV contents for the coculture and the mixed consortium, equal to 73.7 ± 2.5% w w−1 and 49.6 ± 13% w w−1, respectively, were obtained with methane and the VFAs mixture. This study demonstrates the suitability of cocultures and biobased cosubstrates for the sustainable production of the biodegradable polymer PHBV. 2024-12-17T11:01:16Z 2024-12-17T11:01:16Z 2024-12-17T11:01:16Z 2024 info:eu-repo/semantics/article ACS Sustainable Chemistry & Engineering, 2024, vol.12, n.11, p. 4690-4699 2168-0485 https://uvadoc.uva.es/handle/10324/72661 10.1021/acssuschemeng.3c08570 4690 11 4699 ACS Sustainable Chemistry & Engineering 12 2168-0485 eng https://pubs.acs.org/doi/full/10.1021/acssuschemeng.3c08570 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ © 2024 The Author(s) Atribución 4.0 Internacional ACS (American Chemical Society)