RT Journal Article
T1 Enhancing the interpretation of biochemical methane potential assays through methane production kinetics: A case study with grass clippings and fruit-vegetable waste
A1 Arhoun, Brahim
A1 Muñoz-Cabello, Belén
A1 Benaisa, Souad
A1 Gómez-Lahoz, César
A1 Vereda-Alonso, Carlos
A1 Cerrillo-González, María del Mar
K1 Residuos - Aprovechamiento
K1 Cultivos - Aprovechamiento
K1 Biogas
AB Anaerobic co-digestion (AcoD) of grass waste (GS) with fruit and vegetable waste (FVW) was evaluated to improve methane generation from lignocellulosic biomass. Batch BMP tests were performed using raw grass (GSr), size-reduced grass (GSp), and GS:FVW mixtures.FVW exhibited high biodegradability (453 Nml CH4/gVS; BDI 97.7%), whereas GS showed markedly lower conversion (169 Nml CH4/gVS; BDI 41.2%). Particle-size reduction of grass from 20 mm to <5 mm increased the methane production rate but did not significantly affect ultimate methane yield. Co-digestion behavior was strictly additive, with CPI values approximately equal to 1 for all mixtures. Among the kinetic formulations, the Two-fractions First-order and Multi-stages models provided the best description of methane production, particularly when BMP values were fixed to their theoretical predictions derived from CHNSO. A mathematical demonstration showed that the analytic expression of the Multi-stage model can be transformed into the Two-fractions First-order formulation, confirming their mathematical equivalence despite differing conceptual interpretations.These results highlight the suitability of FVW as a co-substrate for GS digestion and demonstrate the value of kinetic modeling for interpreting and predicting biomethane production from slowly degradable feedstocks.
PB Elsevier
YR 2026
FD 2026
LK https://hdl.handle.net/10630/45321
UL https://hdl.handle.net/10630/45321
LA eng
NO Brahim Arhoun, Belén Muñoz-Cabello, Souad Benaisa, Cesar Gomez-Lahoz, Carlos Vereda-Alonso, María del Mar Cerrillo-González, Enhancing the interpretation of biochemical methane potential assays through methane production kinetics: A case study with grass clippings and fruit-vegetable waste, Bioresource Technology Reports, Volume 33, 2026, 102597, ISSN 2589-014X, https://doi.org/10.1016/j.biteb.2026.102597.
NO Funding for open access charge: Universidad de Málaga / CBUA
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026