RT info:eu-repo/semantics/article
T1 Microalgal-bacterial consortium for the removal of volatile methylsiloxanes from biogas in a multi-channel capillary photobioreactor
A1 Salgado, Eva M.
A1 Rodríguez, Nerea
A1 Ángeles Torres, Roxana
A1 Gonçalves, Ana L.
A1 Ratola, Nuno
A1 Pires, José C.M.
A1 Cantera Ruiz De Pellon, Sara
A1 Lebrero Fernández, Raquel
K1 Biogas upgrading
K1 Capillary bioreactor
K1 Chlorella vulgaris
K1 Gas-liquid mass transfer
K1 Siloxanes
K1 Surfactants
K1 3308 Ingeniería y Tecnología del Medio Ambiente
AB Volatile methylsiloxanes (VMS) are widely occurring biogas contaminants that hinder the performance andlifetime of energy recovery systems. Despite the feasibility of biological VMS removal, important limitationsremain, and the use of microalgal-bacterial consortia has not yet been investigated. The present study presentsthe first assessment of the removal of seven VMS from simulated biogas using a multi-channel capillary pho-tobioreactor (PBR). Chlorella vulgaris was initially used as the sole inoculum, followed by the addition of mixedrecirculation sludge, VMS-enriched sludge, and the surfactant Tween 80. C. vulgaris provided CO2 fixation ratesup to 302 mgCO2 L 1 d 1 and average total VMS removal and elimination capacity of 36 ± 10% and 1142 ± 436μg L 1 h 1, respectively. PBR re-inoculation with sludge did not significantly improve the average VMS removaldue to gas-liquid mass transfer limitations. The addition of Tween 80 increased the total VMS removal efficiencyand elimination capacity to 60 ± 4% and 2136 ± 195 μg L 1 h 1, respectively. This improvement was attributedto enhanced mass transfer of VMS such as D5 (decamethylcyclopentasiloxane) from the simulated biogas to theculture, along with a substantial increase in siloxane adsorption and accumulation in the biomass. The combi-nation of a microalgal-bacterial consortium with a capillary reactor was proved effective for VMS removal,namely in the presence of a surfactant. These findings open new perspectives for the integration of microalgae-based systems and advances PBR designs into biogas upgrading technologies, which are essential to enable thereliable large-scale use of biogas as a renewable energy source.
PB Elsevier
SN 1385-8947
YR 2026
FD 2026
LK https://uvadoc.uva.es/handle/10324/84017
UL https://uvadoc.uva.es/handle/10324/84017
LA eng
NO Chemical Engineering Journal, 2026, vol. 536, p. 175747
NO Producción Científica
DS UVaDOC
RD 13-abr-2026