Biofiltration with Farm AirClean from SKOV has proven an efficient tool for the elimination of volatile organic compounds and ammonia from livestock facilities, thereby reducing nuisance odours and ammonia emissions to the local environment. Jeppe Lund Nielsen of Aalborg University, Aalborg, Denmark, et al. report that biofiltration with microbial filters can remove smelly compounds.

The filters removed 99.9 per cent, 94 per cent, and 90 per cent of the butyric acid, dimethyl disulfide, and ammonia in the exhaust air, respectively, as well as reducing carboxylic acid concentrations by more than 70 per cent, organic sulphur compounds by up to 50 per cent, and various aromatic compounds by anywhere from 48 to 89 per cent.

The project is a part of the VMPIII research project Function of Biological Air Filters funded by the Ministry of Food, Agriculture and Fisheries. The research is published in the December 2011 issue of the journal Applied and Environmental Microbiology.
http://aem.asm.org/content/early/2011/10/14/AEM.06175-11.abstract