Abstract: A livestock shed for keeping livestock animals includes a shed building for keeping the livestock animals, having a floor which is at least partially permeable to excretory products from the livestock animals, a liquid-tight manure cellar for collecting excretory products which is situated at least partly under the floor, and an air scrubber connected to the manure cellar and configured to at least partly clean polluted manure cellar air. The air scrubber is provided directly above the manure cellar.

Abstract: In an assembly of a living surface for a farm mammal, in particular cattle, and a processing device for processing urine from the farm mammal, the living surface is configured to catch the excretory products including feces and urine from the farm mammal, wherein the assembly includes a urine removal device for removing urine essentially separately from feces and draining the urine from the living surface in a urine-rich stream, and is configured to feed the urine-rich stream to the processing device, and wherein the processing device includes a nitrogen removal device for removing nitrogenous substances from the urine-rich stream.