Abstract: The invention relates to the agricultural industry, specifically to the processing of organic waste materials (livestock and poultry farming waste, domestic and industrial waste water, straw, peat and other organic substances) to produce organomineral fertilizers in granulated form. The method for producing a granulated organomineral fertilizer from organic waste materials comprises feeding the mixture components, removing mechanical impurities, mixing with the addition of mineral components, grinding, decontaminating, homogenizing, granulating and drying. The grinding, decontamination, homogenization and granulation processes are performed simultaneously on continuously operating heated rollers with the mass to be processed being passed through shaping rings of the rollers and with cutting to form granules. The granules are dried to a set moisture content in a continuously operating heated vacuum dryer operating in pulsed vacuum modes.

Abstract: The present invention relates to methods for recovering rare earth elements, in particular, from phosphogypsum. The claimed method comprises acidic extraction of rare earth elements from phosphogypsum using sulfuric acid-nitric acid mixture solution at 3.2-1.2 ratio with concentration of 1-3% by weight and at liquids-solids ratio of 4-5 within 8-12 minutes with simultaneous hydroacoustic action on the extraction suspension agent being mixed succeeded by separation of insoluble gypsum from extraction suspension agent and by recovery of rare earth elements from extraction solution using cation-exchange sorption by passing the latter through cation-exchange filter. The claimed method allows both to increase the recovery rate of rare earth elements and to reduce by half the time of the process accomplished at lower concentrations and with smaller volumes of acidic reagents.

Abstract: The invention relates to a technique of disinfecting household and industrial waste water used as the basis of organo-mineral fertilizers. The present method of disinfection is carried out by means of quick vacuum-pulse actions on sewage sludge using a receiver and quick response valves, with a pulse duration of less than 1.0 seconds at a pressure of not more than 20 mmHg to achieve the required degree of disinfection. Technical result of the use of the invention is to accelerate and simplify the process of disinfection method.

Abstract: The invention relates to a technique of disinfecting household and industrial waste water used as the basis of organo-mineral fertilizers. The present method of disinfection is carried out by means of quick vacuum-pulse actions on sewage sludge using a receiver and quick response valves, with a pulse duration of less than 1.0 seconds at a pressure of not more than 20 mmHg to achieve the required degree of disinfection. Technical result of the use of the invention is to accelerate and simplify the process of disinfection method.

Abstract: The present invention relates to methods for recovering rare earth elements, in particular, from phosphogypsum. The claimed method comprises acidic extraction of rare earth elements from phosphogypsum using sulfuric acid-nitric acid mixture solution at 3.2-1.2 ratio with concentration of 1-3% by weight and at liquids-solids ratio of 4-5 within 8-12 minutes with simultaneous hydroacoustic action on the extraction suspension agent being mixed succeeded by separation of insoluble gypsum from extraction suspension agent and by recovery of rare earth elements from extraction solution using cation-exchange sorption by passing the latter through cation-exchange filter. The claimed method allows both to increase the recovery rate of rare earth elements and to reduce by half the time of the process accomplished at lower concentrations and with smaller volumes of acidic reagents.

Abstract: The present invention relates to agriculture and, in particular, to the methods used for producing mineral organic fertilizer mixtures based on wastewater sludges. The claimed method involves mixing of wastewater sludges with the detoxicant—highly dispersed sodium humate with particles not larger than 100 ?m and in quantity of not less than 10% of the sludge mass. The invention allows to improve application efficiency of wastewater sludges as fertilizers due to the reduction of heavy metals contained in the sludges.