RT info:eu-repo/semantics/article
T1 Indoor air VOCs biofiltration by bioactive coating packed bed bioreactors
A1 González Martín, Javier
A1 Sendino Cantera, Sara
A1 Muñoz Torre, Raúl
A1 Lebrero Fernández, Raquel
K1 Biotecnología
K1 Air pollution
K1 Bioactive coating
K1 Indoor air
K1 Biofiltration
K1 Recubrimiento bioactivo
K1 Aire interior
K1 Biofiltración
K1 3308 Ingeniería y Tecnología del Medio Ambiente
AB Bioactive coatings are envisaged as a promising biotechnology to tackle the emerging problem of indoor air pollution. This solution could cope with the low concentrations, the wide range of compounds and the hydrophobicity of some indoor air VOCs, which are the most important bottlenecks regarding the implementation of conventional biotechnologies for indoor air treatment. A bioactive coating-based bioreactor was tested in this study for the abatement of different VOCs (n-hexane, toluene and α-pinene) at different empty bed residence times (EBRT) and inlet VOC concentrations. The performance of this reactor was compared with a conventional biofilm-based bioreactor operated with the same microbial inoculum. After an acclimation period, the bioactive coating-based bioreactor achieved abatements of over 50% for hexane, 80% for toluene and 70% for pinene at EBRTs of 112–56 s and inlet concentrations of 9–15 mg m−3. These results were about 25, 10 and 20% lower than the highest removals recorded in the biofilm-based bioreactor. Both bioreactors experienced a decrease in VOC abatement by ∼25% for hexane, 45% for toluene and 40% for pinene, after reducing the EBRT to 28 s. When inlet VOC concentrations were progressively reduced, VOC abatement efficiencies did not improve. This fact suggested that low EBRTs and low inlet VOCs concentration hindered indoor air pollutant abatement as a result of a limited mass transfer and bioavailability. Metagenomic analyses showed that process operation with toluene, hexane and pinene as the only carbon and energy sources favored an enriched bacterial community represented by the genera Devosia, Mesorhizobium, Sphingobacterium and Mycobacterium, regardless of the bioreactor configuration. Bioactive coatings were used in this work as packing material of a conventional bioreactor, achieving satisfactory VOC abatement similar to a conventional bioreactor.
PB Elsevier
SN 0301-4797
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/63023
UL https://uvadoc.uva.es/handle/10324/63023
LA eng
NO Journal of Environmental Management, 2024, vol. 349, 119362
NO Producción Científica
DS UVaDOC
RD 23-dic-2024