title: Biofiltration of reduced sulphur compounds and community analysis of sulphur-oxidizing bacteria.
abstract: The present work aims to use a two-stage biotrickling filters for simultaneous treatment of hydrogen sulphide (H(2)S), methyl mercaptan (MM), dimethyl sulphide (DMS) and dimethyl disulphide (DMDS). The first biofilter was inoculated with Acidithiobacillus thiooxidans (BAT) and the second one with Thiobacillus thioparus (BTT). For separate feeds of reduced sulphur compounds (RSC), the elimination capacity (EC) order was DMDS>DMS>MM. The EC values were 9.8 g(MM-S)/m(3)/h (BTT; 78% removal efficiency (RE); empty bed residence time (EBRT) 58 s), 36 g(DMDS-S)/m(3)/h (BTT; 94.4% RE; EBRT 76 s) and 57.5 g(H2S-S)/m(3)/h (BAT; 92% RE; EBRT 59 s). For the simultaneous removal of RSC in BTT, an increase in the H(2)S concentration from 23 to 293 ppmv (EBRT of 59 s) inhibited the RE of DMS (97-84% RE), DMDS (86-76% RE) and MM (83-67% RE). In the two-stage biofiltration, the RE did not decrease on increasing the H(2)S concentration from 75 to 432 ppmv.
authors.affiliation: Department of Chemical Engineering and Food Technologies, Faculty of Sciences, University of Cádiz, 11510 Puerto Real, Cádiz, Spain. martin.ramirez@uca.es
authors.forename: Martín
authors.initials: M
authors.lastname: Ramírez
authors.forename: Maikel
authors.initials: M
authors.lastname: Fernández
authors.forename: Claudia
authors.initials: C
authors.lastname: Granada
authors.forename: Sylvie
authors.initials: S
authors.lastname: Le Borgne
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Gómez
authors.forename: Domingo
authors.initials: D
authors.lastname: Cantero
mesh_terms: D013856:Acidithiobacillus thiooxidans / Q000378:metabolism*; D002849:Chromatography, Gas; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D013457:Sulfur Compounds / Q000302:isolation & purification* / Q000378:metabolism; D013855:Thiobacillus / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D013457:Sulfur Compounds