Agriculture is considered one of the largest sources of ammonia emissions. The focus is particularly on cattle farming. The Johann Heinrich von Thünen Institute has calculated that ammonia emissions can be reduced if the cattle stables are set up differently and an exhaust air duct system is installed. At the same time, animal welfare increases. The German Federal Environmental Foundation (DBU) funded the project.
"One way to reduce emissions is the so-called partial underfloor suction," explains technical project manager Stefan Linke. The high ammonia concentration is vacuumed and cleaned under a slatted floor on which the cattle are standing. Above the floor, wind continues to ventilate the stable. In this way, ammonia pollution can be reduced and animal welfare can be improved at the same time.
Together with the entrepreneurial cooperation partner Norddeutsche Bauernsiedlung, the researchers at the institute simulated a cattle barn with 255 animals in which partial underfloor suction is used. "The results show that ammonia emissions have fallen significantly," says Linke.
The complete press release of the German Federal Environmental Foundation (Deutsche Bundesstiftung Umwelt DBU) can be found in German here. https://www.dbu.de/123artikel38968_2442.html
You can find more information on the overall project here. https://www.thuenen.de/en/at/projects/environmental-technology-livestock-husbandry/partial-underfloor-suction-in-cattle-stables/