title: One-stage biotrickling filter for the removal of a mixture of volatile pollutants from air: performance and microbial community analysis.
abstract: The biodegradation of gas-phase mixtures of methanol, α-pinene and H2S was examined in a biotrickling filter (BTF), inoculated with a microbial consortium composed of an autotrophic H2S-degrading culture, and pure strains of Candida boidinii, Rhodococcus erythropolis, and Ophiostoma stenoceras. The inlet concentrations of methanol, α-pinene and H2S varied from 0.05 to 3.3 gm(-3), 0.05 to 2.7 gm(-3), and 0.01 to 1.4 gm(-3), respectively, at empty bed residence times (EBRT) of either 38 or 26s. The maximum elimination capacities (ECmax) of the BTF were 302, 175, and 191 gm(-3)h(-1), with 100%, 67%, and >99% removal of methanol, α-pinene and H2S, respectively. The presence of methanol showed an antagonistic removal pattern for α-pinene, but the opposite did not occur. For α-pinene, inlet loading rates (ILRs) >150 gα-pinenem(-3)h(-1) affected its own removal in the BTF. The presence of H2S did not show any declining effect on the removal of both methanol and α-pinene.
authors.affiliation: Department of Chemical Engineering, University of La Coruña, Campus da Zapateira, Rua da Fraga, 10, E-15008 La Coruña, Spain.
authors.forename: M Estefanía
authors.initials: ME
authors.lastname: López
authors.forename: Eldon R
authors.initials: ER
authors.lastname: Rene
authors.forename: Luc
authors.initials: L
authors.lastname: Malhautier
authors.forename: Janick
authors.initials: J
authors.lastname: Rocher
authors.forename: Sandrine
authors.initials: S
authors.lastname: Bayle
authors.forename: María C
authors.initials: MC
authors.lastname: Veiga
authors.forename: Christian
authors.initials: C
authors.lastname: Kennes
mesh_terms: D000393:Air Pollutants / Q000302:isolation & purification*; D001419:Bacteria / Q000378:metabolism*; D000081008:Bicyclic Monoterpenes; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D058645:Denaturing Gradient Gel Electrophoresis; D005374:Filtration / Q000295:instrumentation*; D005658:Fungi / Q000378:metabolism*; D006862:Hydrogen Sulfide / Q000302:isolation & purification; D000432:Methanol / Q000302:isolation & purification; D059013:Microbial Consortia; D039821:Monoterpenes / Q000302:isolation & purification; D010802:Phylogeny; D013997:Time Factors; D014835:Volatilization
chemical_list: D000393:Air Pollutants; D000081008:Bicyclic Monoterpenes; D039821:Monoterpenes; C005451:alpha-pinene; D000432:Methanol; D006862:Hydrogen Sulfide