title: Characterization of gaseous odorous emissions from a rendering plant by GC/MS and treatment by biofiltration.
abstract: This research focuses on the identification and quantification of odorous components in rendering plant emissions by GC/MS and other analytical methods, as well as the description of phenomena occurring in biofilter in order to improve the removal efficiency of industrial biofilters. Among the 36 compounds quantified in the process air stream, methanethiol, isopentanal and hydrogen sulfide, presented the major odorous contributions according to their high concentrations, generally higher than 10 mg m(-3), and their low odorous detection thresholds. The elimination of such component mixtures by biofiltration (Peat packing material, EBRT: 113 s) was investigated and revealed that more than 83% of hydrogen sulfide and isopentanal were removed by biofilter. Nevertheless, the incomplete degradation of such easily degradable pollutants suggested inappropriate conditions as lack of nutrients and acidic pH. These inadequate conditions could explain the lack of performance, especially observed on methanethiol (53% of RE) and the production of oxygenated and sulfur by-products by the biofilter itself.
authors.affiliation: Atemax France, Route d'Alençon, 61400 Saint-Langis-lès-Mortagne, France. benoit.anet@atemax.fr
authors.forename: Benoît
authors.initials: B
authors.lastname: Anet
authors.forename: Marguerite
authors.initials: M
authors.lastname: Lemasle
authors.forename: Catherine
authors.initials: C
authors.lastname: Couriol
authors.forename: Thomas
authors.initials: T
authors.lastname: Lendormi
authors.forename: Abdeltif
authors.initials: A
authors.lastname: Amrane
authors.forename: Pierre
authors.initials: P
authors.lastname: Le Cloirec
authors.forename: Gilles
authors.initials: G
authors.lastname: Cogny
authors.forename: Romain
authors.initials: R
authors.lastname: Fillières
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000447:Aldehydes / Q000032:analysis; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D005525:Food-Processing Industry; D008401:Gas Chromatography-Mass Spectrometry; D006862:Hydrogen Sulfide / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D009812:Odorants / Q000032:analysis*; D012987:Soil; D013438:Sulfhydryl Compounds / Q000032:analysis
chemical_list: D000393:Air Pollutants; D000447:Aldehydes; D012987:Soil; D013438:Sulfhydryl Compounds; C005231:methylmercaptan; C032251:isovalerylaldehyde; D006862:Hydrogen Sulfide
keywords: Biofiltration; Odor analysis; Odorous emissions; Rendering industry