NOVELTY - The method for the production of solid-like, biodegradable fertilizer from sewage sludge coming from municipal and/or food industry and from cellulose sludge coming from paper industry by the supply of alkaline substances such as calcium oxide, comprises dewatering the delivered sludge until it has 20-40% of drying substance and then storing in a sludge trap (1), continuously guiding the de-watered sludge in lowest part of the sludge trap, and supplying the pre-treated sludge from the sludge trap together with pre-treated cellulose sludge directly to a flow mixer (13).    USE - Method useful for the production of solid-like, biodegradable fertilizer from sewage sludge coming from municipal and/or food industry and from cellulose sludge coming from paper industry.    ADVANTAGE - The method ensures simple and efficient production of solid-like, biodegradable fertilizer.    DETAILED DESCRIPTION - The method for the production of solid-like, biodegradable fertilizer from sewage sludge coming from municipal and/or food industry and from cellulose sludge coming from paper industry by the supply of alkaline substances such as calcium oxide, comprises dewatering the delivered sludge until it has 20-40% of drying substance and then storing in a sludge trap (1), continuously guiding the de-watered sludge in lowest part of the sludge trap, supplying the pre-treated sludge from the sludge trap together with pre-treated cellulose sludge directly to a flow mixer (13) and then processing to a sewage- and cellulose sludge mixture (29), adding calcium oxide to the sewage- and cellulose sludge mixture under pressure during the mixing process in the flow mixer in such a way that the mixture treated with calcium oxide leaves the flow mixer before carrying out an exothermic reaction, adding the mixture treated with calcium oxide to a converter (14.1, 14.2) in which the mixture is subjected to further mixing process and is dehydrated by hyperthermia chemical reaction, supplying the dehydrated mixture after its cooling to oligoelements, and subjecting the dehydrated mixture enriched with the oligoelements to a post-drying with subsequent pulverization, granulation or pelletizing. The sewage- and cellulose sludge mixture is enriched with powdered mineral. The cellulose sludge consists of moistened minced wood, wood material and/or minced paper and cardboard from plant part, paper pulp and/or food waste, where only a portion of the homogenized mixture with calcium oxide is treated during mixing process in flow mixer. The portion of the homogenized mixture turned to the gravitational force corresponds to the volume half of the flow mixer. The calcium oxide is brought under pressure of 15-30 bar and the calcium oxide arrives in fog form in the flow mixer. The calcium oxide is concentrically injected at several places of the flow mixer distributed in the volume half of the homogenized mixture, where hard unhydrated lime, whose reaction time is 6 minutes is used as calcium oxide. The powdered mineral is brought under pressure to a second volume half of the flow mixer lying above the first volume half. The pressure is 5-15 bar. The powdered mineral is brought to the dehydrated mixture coming out from the converter. The oligoelements and minerals have a grain size of 0.02-0.06 mm. The calcium oxide and/or minerals are injected into the homogenized mixture. The mixture continuously flowing through the flow mixer is treated in the converter. The mixture from the flow mixer is screened before the external influences and arrives in the converter. The mixing process continues in the converter in two seconds. The hyperthermia originating in the mixing process in converter through water cooling is adjusted so that a temperature of 120 degrees C is not exceeded. The water heated by hyperthermia flows back to a water circulation. The mixture is treated in a further mixer. The mixer is brought to organic substances obtained from processing of household waste and is subjected to homogenization. The homogeneous mixture taken from the mixer is post-dried and pulverized or granulated or pelletized. The available metal parts such as fittings, nails, clamps are sorted out during mincing of wood, wood materials and/or paper and cardboard in mechanical or magnetical manner. INDEPENDENT CLAIMS are included for:    (1) a device for the production of solid-like, biodegradable fertilizer from sewage sludge coming from municipal and/or food industry and from cellulose sludge coming from paper industry; and    (2) a solid-like, biodegradable fertilizer.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of a part of a plant for the production of solid-like, biodegradable fertilizer.    Sewage sludge trap (1)    Flow mixer (13)    Converter (14.1, 14.2)    Volume half (16)    Sewage sludge- and cellulose sludge mixture. (29)