Gas Loop: Ammonia emissions in pig stable from a problem to a fertilizer resource

Gas Loop has developed and monitored an air washing system that removes ammonia from the air of animal housing and recovers it in an ammonium sulphate solution. This increases animal welfare and productivity due to better air quality inside the pig housing. An essential nutrient like nitrogen, often emitted as harmful ammonia into the atmosphere, can be reclaimed and repurposed into fertilisers, contributing to nutrient recovery and reuse initiatives. Ammonium sulphate solution produced complies with the EU Regulation 2019/1009 as liquid inorganic N fertilisers based on category PFC1. The recovered fertilisers allow for a GHG reduction due to the replacement of N industrial fertilisers equal to 66t CO2eq per year and per ton of live weight.