Patent ID: 6206945
Filing Date: 2001-03-27
Classification: C05D,Y02W

Abstract:
A process for producing a slow release ammonium magnesium phosphate fertilizer from animal manure comprisinga forming a mixture of animal manure and calcined soft burned dolomite, the dolomite being added in sufficient amount to raise the temperature of the mixture to above about 100.degree. C. upon hydration and in excess of the amount necessary to react with the phosphate values present in the manure;b adding water to said mixture, wherein the calcined dolomite is hydrated and the temperature of the mixture raises to above about 100.degree. C., thereby destroying parasites and undesirable bacteria, while ammonia is released from the mixture;c absorbing the ammonia in an aqueous acidic medium, forming an aqueous solution of an ammonium salt:d adjusting the pH of the mixture obtain in step b to about between 7.0 and 7.5;e inoculating the mixture obtained in step d with an aqueous suspension of natural guano and anaerobically fermenting the mixture to produce said fertilizer.