Patent ID: 7691170

Claim:
Process for treating raw manure in order to produce a solid fertilizer, a liquid fertilizer and recyclable water, comprising the following steps: adding to a quantity of raw manure, a flocculating agent capable of producing flocks containing solid components of manure and mixing the combined raw manure and flocculating agent; adding to the product obtained by combining the raw manure and the flocculating agent, a sedimentation agent in the form of natural stone dust, to produce a separation of the solid phase and a liquid phase by decantation; filtering the liquid phase in a manner to produce on the one hand a concentrate containing substantially all the nitrogenous compounds of the manure and on the other hand a filtrate constituting the recyclable water; adding the filtrate constituting the recyclable water to the combined raw manure and flocculating agent: collecting the concentrate of nitrogenous compounds constituting the liquid fertilizer; dehydrating the solid phase obtained from the manure to reduce its water content to a value between 10 and 60% by weight; and agglomerating the dehydrated solid phase in order to obtain balls containing the solid fertilizer.