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Agricultural Ammonia Emissions Can be Reduced, January 9 2012


Technological solutions that can reduce agriculture’s contribution to air pollution are already available


Agriculture’s major contributor to air pollution is emission of ammonia. There is, however, help to be found, according to research Jørgen E. Olesen from the Department of Agroecology and Environment at Aarhus University.
- There are plenty of technological solutions that can reduce ammonia emissions from agriculture, he says.
Agricultural ammonia comes from animal housing, manure storage and manure application in the field. Denmark has regulations with regard to ammonia emission that apply when the farmer intends to expand or alter his animal production.
- There are maximum levels with regard to how much ammonia an animal farm may emit and these regulations have become increasingly stricter.
Evaporation of ammonia from animal housing can be reduced by cleaning the ventilation air. This is an expensive solution. Another possibility is to acidify the slurry, which makes a big difference. Maintaining clean surfaces in the animal houses so they are not covered in manure also helps keep ammonia evaporation down, as does cooling the slurry and the floors.
Evaporation can also occur during storage of the manure or slurry. Regulations state that the storage facilities must be covered or, in the case of slurry, have a functional floating cover.


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