RT info:eu-repo/semantics/article
T1 Simultaneous recovery of ammonia and volatile fatty acids from dark fermentation effluents via gas-liquid membrane contactor
A1 Romano, Fabiana
A1 Zarra, Tiziano
A1 Palacio Martínez, Laura
A1 García Depraect, Octavio
A1 Muñoz Torre, Raúl
K1 Ammonia recovery
K1 Dark fermentation
K1 Ionic liquids
K1 Membrane contactor
K1 VFAs recovery
K1 3308 Ingeniería y Tecnología del Medio Ambiente
AB The increasing interest in sustainable waste management has spurred the development of innovative technolo-gies for resource recovery. In this context, organic waste fermentation generates effluents rich in ammonium andvolatile fatty acids (VFAs), both of which represent valuable precursors for the fertilizer and chemical industries.This study introduces and evaluates an innovative membrane-based methodology enabling the simultaneousrecovery of ammonia (NH3) and VFAs from synthetic and real dark fermentation broths. The experimental setupemployed a gas–liquid membrane contactor consisting of a 44 cm2 hydrophobic polytetrafluoroethylene (PTFE)membrane (0.22 μm pore size) housed in a flat-plate module. The effects of different extraction solutions (HCl,H2SO4, NaOH, and ionic liquids), their concentrations, and the flow rates of both the fermentation effluent (500mL min 1) and the extracting solution (250 mL min 1) were systematically investigated, along with the influenceof the broth pH (7.0 and 5.5). Among the tested conditions, 2 M NaOH was identified as the most effectiveextraction medium, achieving simultaneous recoveries of 24.5 % for NH3, 50 % for propionic, butyric, andvaleric acids, and 42 % for acetic acid after 168 h of operation in an acidogenic broth at pH 5.5. Furthermore,higher solvent concentrations and increased recirculation velocities were positively correlated with improvedNH3 and VFA recovery, regardless of the solvent type. Overall, the results highlight the potential of the proposedmembrane contactor-based approach as a promising and scalable technology for integrated resource recoveryfrom fermentation effluents
PB Elsevier
SN 2214-7144
YR 2026
FD 2026
LK https://uvadoc.uva.es/handle/10324/81665
UL https://uvadoc.uva.es/handle/10324/81665
LA eng
NO Journal of Water Process Engineering, 2026, vol. 81, p. 109388
NO Producción Científica
DS UVaDOC
RD 16-ene-2026