RT info:eu-repo/semantics/article
T1 Hybrid section-based modeling of gas-phase hydrodynamics in biotrickling filters: Influence of packing material on residence time distributions
A1 Carreno López, Felipe
A1 Moreno Casas, Patricio
A1 Scott, Felipe
A1 Vergara Fernández, Alberto
A1 Sierra Pallarés, José Benito
A1 Muñoz Torre, Raúl
K1 Axial dispersion
K1 Biotrickling filters
K1 Biofiltration
K1 Gas treatment
K1 Residence time distribution
K1 3308 Ingeniería y Tecnología del Medio Ambiente
AB In this study, the gas-phase hydrodynamics within a 6.5 L biotrickling filter were quantified using pulse-injection residence time distributions (RTDs) recorded with a cost-effective metal oxide (MOx) sensor. Thiswas conducted at a constant gas flow rate of 8 L min−1 across trickling liquid velocities (TLV) ranging from 0to 10 m h−1, using three different packings: polyurethane foam, Tri-Packs Jaeger spheres, and wood bark. Ahybrid section-based model was developed and evaluated against two closed-closed axial dispersion variants(AD𝑐�𝑐� +CSTR and AD𝑐�𝑐� +PFR). Model discrimination using AIC/BIC and 𝑅�2 indicated that the optimal modeldescription is contingent upon the packing material and operating regime: the hybrid model most accuratelyrepresented foam and most wood cases, whereas AD𝑐�𝑐� +CSTR was sufficient for spheres under irrigation, andAD𝑐�𝑐� +PFR consistently underperformed. Employing the optimal model in each scenario, the Peclet numberincreased with TLV for PUF and spheres (with diminishing returns at the highest TLV), whereas woodexhibited a low Peclet number and non-monotonic behavior. By explicitly partitioning the mean residencetime between the buffer zones and the bed, the hybrid model effectively separates the boundary hold-upfrom the core dispersion, yielding a more precise representation of the packed bed Peclet number. Overall,MOx-based RTD measurements, in conjunction with model comparison, offer a cost-effective in situ diagnostictool for differentiating boundary mixing from bed transport, thereby informing packing selection and operatingparameters in gas-phase biofiltration
PB Elsevier
SN 1369-703X
YR 2026
FD 2026
LK https://uvadoc.uva.es/handle/10324/81018
UL https://uvadoc.uva.es/handle/10324/81018
LA eng
NO Biochemical Engineering Journal, 2026, vol. 227, p. 110049
NO Producción Científica
DS UVaDOC
RD 23-dic-2025