Patent ID: 6916426
Filing Date: 2005-07-12
Classification: C02F,C05D,C05F,Y02A,Y02P,Y02W,Y10S

Abstract:
1. A method of treating animal waste material in the form of a slurry, which comprises the steps of: a) flocculating the slurry; b) processing the slurry, within a sufficiently short period of time following the production of the waste material by animals that urates of potassium and ammonium remain in solid form, to thereby separate the slurry into solid material, comprising potassium urate and ammonium urate, and liquid; c) processing the liquid to extract dissolved phosphorous from the liquid; d) processing the liquid to extract further potassium and ammonium from the liquid; e) combining the phosphorous, potassium and ammonium extracted in steps c) and d) with the solid material separated in step b) to form a mixture; and f) drying the mixture.