2026-04-27T20:24:08Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/586802025-02-21T12:35:55Zcom_10324_35294com_10324_952com_10324_894col_10324_35295

Unlocking the high-rate continuous performance of fermentative hydrogen bioproduction from fruit and vegetable residues by modulating hydraulic retention time Martínez Mendoza, Leonardo José García Depraect, Octavio Muñoz Torre, Raúl Producción Científica Harnessing fruit-vegetable waste (FVW) as a resource to produce hydrogen via dark fermentation (DF) embraces the circular economy concept. However, there is still a need to upgrade continuous FVW-DF bioprocessing to enhance hydrogen production rates (HPR). This study aims to investigate the influence of the hydraulic retention time (HRT) on the DF of FVW by mixed culture. A stirred tank reactor under continuous mesophilic conditions was operated for 47 days with HRT stepwise reductions from 24 to 6 h, leading to organic loading rates between 47 and 188 g volatile solids (VS)/L-d. The optimum HRT of 9 h resulted in an unprecedented HPR from FVW of 11.8 NL/L-d, with a hydrogen yield of 95.6 NmL/g VS fed. Based on an overarching inspection of hydrogen production in conjunction with organic acids and carbohydrates analyses, it was hypothesized that the high FVW-to-biohydrogen conversion rate achieved was powered by lactate metabolism. 2023-02-16T09:55:04Z 2023-02-16T09:55:04Z 2023 info:eu-repo/semantics/article Bioresource Technology, Volume 373, 2023, 128716 0960-8524 https://uvadoc.uva.es/handle/10324/58680 10.1016/j.biortech.2023.128716 128716 Bioresource Technology 373 eng https://www.sciencedirect.com/science/article/pii/S0960852423001426?via%3Dihub info:eu-repo/grantAgreement/EC/H2020/894515 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2023 The Authors Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier SI