Verminderen van methaanemissie uit varkensstallen door dagontmesting : methaan- en ammoniakemissies bij vleesvarkens en gespeende biggen

Summary

This study focuses on reducing methane emission in pig farming through daily manure removal. A new variant was tested on two pig farms with fattening pigs and weaned piglets. For fattening pigs, measurements have been done in pens having 40% solid floor area where the manure channel was flushed daily and the water channel was regularly emptied. This new variant was compared to an earlier version where of pens having 60% solid floor area only the manure channel was flushed daily. Both systems were compared to a control room with pens having 40% solid floor area where manure was stored for a longer period. For weaned piglets, the variant system having 40% solid floor, daily removal of manure and frequent removal of the water channel have been compared with a control room. The new variant reduced methane emissions in the barn by 91.1% for fattening pigs and 95.5% for piglets. Ammonia emissions were reduced by 44.7% for fattening pigs and 86.2% for weaned piglets. Emission factors for methane and ammonia for the new variant were determined to be 1.44 kg CH4/year per pig place and 1.48 kg NH3/year per pig place for fattening pigs, and 0.59 kg CH4/year per pig place and 0.096 kg NH3/year per pig place for weaned piglets. If emissions can be prevented further along the manure chain, the studied barn system can be an effective strategy for reducing emissions and thus strengthen the sustainability of pig farming.