Patent ID: 7785386

Claim:
A process for producing a homogenous particulate organic product from a thickened organic matter sludge, which process comprises: in a treatment state, treating a thickened organic matter sludge successively with ammonia and an inorganic acid, the ammonia causing an increase in the pH of the sludge and the inorganic acid causing a decrease in the pH of the sludge, to form an enriched sludge; in a mixing stage, mixing the enriched sludge and particulate sterilized organic matter to form an organic matter mixture; and in a drying stage, drying the organic matter mixture to obtain a homogeneous particulate organic product, the mass ratio between the enriched sludge and the particulate sterilized organic matter being between 1:1 and 7:3 so that the water content of the mixture is lower than the water content of the enriched sludge, the particulate sterilized organic matter acting as a nucleating agent which aids in the granulation of the enriched sludge, the least some of the particulate sterilized organic matter being in the form of recycled comminuted homogeneous particulate organic product.