(WO9321758-A1)      Animals, partic. pigs, are housed in a barn having a standing area for them and which is connected to a dung-collection chamber. On the bottom of the latter is a layer of flushing liq. with which air is brought into intimate contact, typically by spraying. An air-discharge and supply system can be included, typically with feed pipes and a space round them connected to an extn. system. A sprayer system can be mounted in the space, and a heat-exchanger can also be incorporated, connected to a storage tank for the flushing liq. adjacent to the barn.    ADVANTAGE -   Prevents emission of ammonia and reduces amt. of dung produced.    (EP637907-A1)      Animals, partic. pigs, are housed in a barn having a standing area for them and which is connected to a dung-collection chamber. On the bottom of the latter is a layer of flushing liq. with which air is brought into intimate contact, typically by spraying. An air-discharge and supply system can be included, typically with feed pipes and a space round them connected to an extraction system. A sprayer system can be mounted in the space, and a heat-exchanger can also be incorporated, connected to a storage tank for the flushing liq. adjacent to the barn.    ADVANTAGE -   Prevents emission of ammonia and reduces amt. of dung produced    (EP637907-B1)      Method for treating discharge air from an animal shed and processing washing liquid, at least part of which is located in a manure collection space (4), which is situated under a stall (2) in a accomoation area(s) for the animals and communicates therewith by means of a grid (34) in the floor (47) of the stall (2), by passing the discharge air from the accomdation area(s) through a spray range of washing liquid, which spray range is located outside the stall (2) for the animals, for cleaning the discharge air by the washing liquid (35) and aerating and oxygen enriching the washing liquid (35), after which at least part of the cleaned air is transported to the outside and at least part of the oxygen enriched washing liquid is transported through the manure collection space (4).