High-rise laying hen rearing facility and method

A method for reducing odors associated with a high-rise animal rearing facility, wherein animals are reared in an enclosure on an animal rearing level on a raised platform and manure from the animals falls to a manure collection level disposed below the raised platform, said method comprising:

• spraying an aluminum sulfate solution onto an upper surface of manure present in the manure collection level in amounts and at spraying intervals which are effective to maintain a pH of the surface of the manure at less than or equal to about 7.0 and which are effective to control the atmospheric concentration of ammonia in the animal rearing level at less than or equal to about 25 ppm.

A method for reducing acid rain and PM.sub.10 s associated with atmospheric ammonia pollution originating from a high-rise animal rearing facility, wherein animals are reared in an enclosure on an animal rearing level on a raised platform and manure from the animals falls to a manure collection level disposed below the raised platform, said method comprising:

• spraying an aluminum sulfate solution onto an upper surface of manure present in the manure collection level in amounts and at spraying intervals which are effective to maintain a pH of the surface of the manure at less than or equal to about 7.0 and which are effective to control the atmospheric concentration of ammonia in the animal rearing level at less than or equal to about 25 ppm.

A method for reducing phosphorus solubility of and non-point source phosphorus pollution arising from poultry manure fertilizers obtained from a high-rise animal rearing facility, wherein animals are reared in an enclosure on an animal rearing level on a raised platform and manure from the animals falls to a manure collection level disposed below the raised platform, said method comprising:

• spraying an aluminum sulfate solution onto an upper surface of manure present in the manure collection level in amounts and at spraying intervals which are effective to maintain a pH of the surface of the manure at less than or equal to about 7.0 and which are effective to control the atmospheric concentration of ammonia in the animal rearing level at less than or equal to about 25 ppm.