title: Biofiltration of high concentration of H2S in waste air under extreme acidic conditions.
abstract: Removal of high concentrations of hydrogen sulfide using a biofilter packed with expanded schist under extreme acidic conditions was performed. The impact of various parameters such as H2S concentration, pH changes and sulfate accumulation on the performances of the process was evaluated. Elimination efficiency decreased when the pH was lower than 1 and the sulfate accumulation was more than 12 mg S-SO4(2-)/g dry media, due to a continuous overloading by high H2S concentrations. The influence of these parameters on the degradation of H2S was clearly underlined, showing the need for their control, performed through an increase of watering flow rate. A maximum elimination capacity (ECmax) of 24.7 g m(-3) h(-1) was recorded. As a result, expanded schist represents an interesting packing material to remove high H2S concentration up to 360 ppmv with low pressure drops. In addition, experimental data were fitted using both Michaelis-Menten and Haldane models, showing that the Haldane model described more accurately experimental data since the inhibitory effect of H2S was taken into account.
authors.affiliation: Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France; Université européenne de Bretagne, 5 Boulevard Laënnec, 35000 Rennes, France.
authors.forename: Mouna
authors.initials: M
authors.lastname: Ben Jaber
authors.affiliation: Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France; Université européenne de Bretagne, 5 Boulevard Laënnec, 35000 Rennes, France.
authors.forename: Annabelle
authors.initials: A
authors.lastname: Couvert
authors.affiliation: Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France; Université européenne de Bretagne, 5 Boulevard Laënnec, 35000 Rennes, France.
authors.forename: Abdeltif
authors.initials: A
authors.lastname: Amrane
authors.affiliation: TC'Plastic, Rue Benjamin Franklin, 44160 Pont-Château, France.
authors.forename: Franck
authors.initials: F
authors.lastname: Rouxel
authors.affiliation: Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 Allée de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France; Université européenne de Bretagne, 5 Boulevard Laënnec, 35000 Rennes, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Le Cloirec
authors.affiliation: Ecole des Mines de Nantes, CNRS, GEPEA UMR 6144, 4 Rue Alfred Kastler, 44307 Nantes, France. Electronic address: eric.dumont@mines-nantes.fr.
authors.forename: Eric
authors.initials: E
authors.lastname: Dumont
mesh_terms: D000143:Acids / Q000737:chemistry*; D000388:Air / Q000032:analysis*; D001673:Biodegradation, Environmental; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D006862:Hydrogen Sulfide / Q000032:analysis* / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D011312:Pressure; D012212:Rheology; D013431:Sulfates / Q000032:analysis; D014866:Waste Products / Q000032:analysis*
chemical_list: D000143:Acids; D013431:Sulfates; D014866:Waste Products; D006862:Hydrogen Sulfide