Patent ID: 8141516

Claim:
A pig-raising method, comprising: providing a pig house with a water-supply system and a feeding system, said water-supply system including a plurality of ceramic particles calcined at 1500° C. through 2000° C.; and supplying water that is passed through said ceramic particles for pigs to drink; feeding the pigs a blended feed including combustion ash which constitutes approximately 0.1%-3.0% of a total weight of the blended feed, said combustion ash being made by boiling in hydrochloric acid and then calcining at least one of plant materials including chaff of rice, chaff of wheat, and skins of soybeans; mixing said combustion ash with sawdust to produce a mixture of said combustion ash and the sawdust, said mixture constituting approximately 1%-10% of the total weight of the blend feed; and spreading said mixture of said sawdust and said combustion ash for use as a floor covering.