Transformation of ammonia i biological airfilters

Research output: Contribution to book/anthology/report/proceedingConference abstract in proceedingsResearch

  • Interdisciplinary Nanoscience Center
  • Department of Biological Sciences, Microbiology
Ammonia is a major compound in ventilation air from animal houses. In biological filters it is with varying efficiency transformed by physical, biological, and chemical processes and ends up as ammonium, nitrate, and nitrite dissolved in water and as dinitrogen, nitrous oxide and nitric oxide emitted to the air. To identify the key regulators of these transformations we have combined data from studies of microbiology and performance in 10 experimental and full scale filters of varying design, loading, and management. Inhibition by nitrite controlled ammonium oxidation and pH, while biological nitrite oxidation only appeared in locations with minimal ammonia and nitrite levels. Nitrous oxide emission depended on anoxic microsites, and nitric oxide production was associated with nitrite accumulation. Water and biomass management appear to be the important tools for optimization of ammonia removal without too much energy consumption, waste water production, green house gas emission, or suppression of the filters odor removal efficiency.
Original languageEnglish
Title of host publicationIkke angivet
PublisherUniversidad da Coruña
Publication year2007
Publication statusPublished - 2007
EventInternational Congress on Biotechniques for Air Pollution Control - A Coruña, Spain
Duration: 3 Oct 20075 Oct 2007

Conference

ConferenceInternational Congress on Biotechniques for Air Pollution Control
LandSpain
ByA Coruña
Periode03/10/200705/10/2007

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