As is well known, ammonia is emitted almost exclusively (around 95%) from agricultural areas - a reduction, as required under the EU NEC directive, can therefore only begin here. Protein components of feed have a significant influence on ammonia and odor emissions from livestock farming - the resulting emissions in the neighborhood regularly lead to problems in practice. Not only are years of delays in agricultural construction processes now partly a reality - in Upper Austria, Styria and Burgenland there is also the possibility under construction law for the authorities to subsequently intervene in existing and approved stables.

In practice, there are various options for influencing ammonia and odor emissions from fattening pigs - for example, protein-adapted feeding (protein reduction or multi-fiber feeding) and the addition of tested additives as part of feed production or preparation are useful. PigAir II project in question , odor and ammonia emissions from fattening pig farming using different emission reduction strategies (DaFNE No. 101519 / 1), in-depth emissions and fattening studies will be carried out as part of company cooperation in 2020 - 2021.

Results

Initial results comparing multi-fabrication feeding with a three-phase feeding regime in terms of fattening performance, the release of harmful gases and the release of odors in pig fattening show remarkable results in the reduction of ammonia. The attached image shows the NH3 course during an entire fattening period, measured in the exhaust air stacks. There is a clear reduction in ammonia emissions in the test compartment (compartment 3, blue curve) compared to the control; the recorded reduction in ammonia here is around 50%.