| Title: | Evaluation of clay aggregate biotrickling filters for treatment of gaseous emissions from intensive pig production |
| Author(s): | Liu D; Lokke MM; Riis AL; Mortensen K; Feilberg A; |
| Address: | "Department of Engineering, Faculty of Science and Technology, Aarhus University, Hangovej 2, Aarhus N 8200-DK, Denmark. Department of Food Science, Faculty of Science and Technology, Aarhus University, Blichers Alle 20, Tjele 8830-DK, Denmark. Danish Agriculture & Food Council, Pig Research Centre, Axeltorv 3, Copenhagen V 1609-DK, Denmark. Saint-Gobain Weber A/S, Randersvej 75, Hinge, Randers SV 8940-DK, Denmark. Department of Engineering, Faculty of Science and Technology, Aarhus University, Hangovej 2, Aarhus N 8200-DK, Denmark. Electronic address: af@eng.au.dk" |
| DOI: | 10.1016/j.jenvman.2014.01.023 |
| ISSN/ISBN: | 1095-8630 (Electronic) 0301-4797 (Linking) |
| Abstract: | "Treatment of ventilation air from livestock production by biological airfiltration has emerged as a cost-effective technology for reduction of emissions of odorants and ammonia. Volatile sulfur compounds from livestock production include H2S and methanethiol, which have been identified as potentially important odorants that are not removed sufficiently by biological air filters. Light-expanded clay aggregates (Leca((R))) is a biotrickling filter material that contains iron oxides, which can oxidize H2S and methanethiol, and thus potentially may help to remove these two compounds in biological air filters. This study used on-line PTR-MS measurements to investigate the performances of two Leca((R)) biotrickling filters (abraded Leca((R)) filter and untreated Leca((R)) filter) for removal of odorants and ammonia emitted from an experimental pig house. The results indicated that the abraded Leca((R)) filter had a similar or slightly better capability for removing odorants than the untreated Leca((R)) filter. This may be due to the enlargement of the surface area by the friction process. The volatile sulfur compounds, however, were not removed efficiently by either of the two Leca((R)) filters. Kinetic analysis of a ventilation controlled experiment during the first period indicated that Grau second-order kinetics could be applied to analyze the removal of sulfur compounds and other odorants, whereas the Stover-Kincannon model could only be applied to analyze the removal of odorants other than sulfur compounds, partly due to the limitation of mass transfer of these compounds in the biotrickling filters. In the last measurement period, a production of dimethyl disulfide and dimethyltrisulfide coinciding with strongly enhanced removal of methanethiol was observed for the untreated filter. This was assumed to be enhanced by an incidence of low local air velocity in the filter and indicated involvement of iron-catalyzed reactions in the removal of sulfur compounds" |
| Keywords: | *Aluminum Silicates Ammonia/chemistry Animals Clay Disulfides/chemistry Ferric Compounds/chemistry *Filtration Hydrogen Sulfide/chemistry Livestock *Odorants Oxidation-Reduction Sulfhydryl Compounds/chemistry Swine Volatile Organic Compounds/chemistry Was; |
| Notes: | "MedlineLiu, Dezhao Lokke, Mette Marie Riis, Anders Leegaard Mortensen, Knud Feilberg, Anders eng Research Support, Non-U.S. Gov't England 2014/02/19 J Environ Manage. 2014 Apr 1; 136:1-8. doi: 10.1016/j.jenvman.2014.01.023. Epub 2014 Feb 15" |
