NOVELTY - Preparing organic fertilizers having a high nutrient concentration comprises anaerobically pretreating biogenic raw materials and/or waste products and separating the fermented residues into a solid and a liquid phase, recovering the nutrients from the liquid phase and feeding the nutrients to the solid phase, drying the solid phase, and compacting dry matter.    USE - The process is useful for producing organic fertilizers.    ADVANTAGE - The process produces the organic fertilizers in high yield with high nutrient concentration and consumes less amount of energy.    DETAILED DESCRIPTION - Preparing organic fertilizers having a high nutrient concentration comprises anaerobically pretreating biogenic raw materials and/or waste products and separating the fermented residues into a solid and a liquid phase, recovering the nutrients from the liquid phase and feeding the nutrients to the solid phase, drying the solid phase, and compacting dry matter, where: dissolved ammonium and dissolved hydrogen sulfide are removed from a liquid phase in a desorber; the obtained gaseous nitrogen and sulfur compounds are dissolved in chilled sulfurous biological acid in the downstream vapor scrubber; the scrubbing liquid loaded with dissolved ammonium is discharged from the vapor scrubber as a liquid nutrient concentrate and is fed to the solid phase from the solid-liquid phase separation process; the solid phase of the fermented residues in an evaporator is finely distributed in an evaporator over a period of 0.1-2 seconds and is contacted with a hot air flow having a temperature of 130-150 degrees C; dust-air mixture is extracted from the evaporator via a dust separation complex; the dust separation complex leaving moist air is treated in an exhaust air scrubber before dissipation into an environment; and dusts accumulated in the dust separation complex are classified into organic nitrogen-phosphorus-potassium-sulfur fertilizers and supplied for packing. An INDEPENDENT CLAIM is included for a device for producing organic fertilizer comprising an anaerobic system that serves the pretreatment of the biogenic raw material and/or waste materials, a solid-liquid phase separation station that serves the separation of the fermented residues into the solid phase and a liquid phase, an inhibitor-removing station that recovers the dissolved nitrogen and sulfurous compounds in the liquid phase, drying plant that serves the drying of the solid phase and the liquid nutrient concentrates from the inhibitor-removing station, fume scrubber that serves the detection of the humid exhaust air from the drying plant entrained gaseous nitrogen compounds and compacting and classifying system for removing dusts containing humid exhaust air in dust separation complex from the drying plant, where the inhibitor removing station comprises a heating system and a dispensing tube, which serves the delivery of gas, equipped desorber, a vapor heat exchanger and a fume scrubber that is connected downstream to vapor heat exchanger, the fume scrubber is designed as a trickle apparatus that is operated with cooled biogenic acid, and the evaporator for drying comprises a hot air flow or hot exhaust gas containing grinding units.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of a process for the preparation of the organic fertilizer (Drawing includes non-English language text).    Gas utilization (AA)    Biogenic feedstock (BB)    Desulfurize biogas (CC)    Anaerobic fermentation (DD)    Phase separation. (EE)