FIELD: chemistry.
SUBSTANCE: invention relates to agriculture. The method of producing organomineral fertiliser from solid-phase man-made formations based on sewage sludge, which involves treating a residue placed in a vessel in a cassette with an acidic washing solution, neutralising with an alkaline extractant with regeneration of the washing solution, wherein the cassette with the residue is placed in the vessel vertically, and vibrations are generated in the liquid in between, wherein the acidic washing solution used is a mixture of inorganic acids, and the alkaline extractant used is a mixture of alkali metal hydroxides; after acid treatment, solid organomineral fertilisers are obtained by removing heavy metals; after alkaline treatment, liquid organomineral fertilisers are obtained in form of water-soluble humates, and after drying thereof, solid organomineral fertilisers are obtained, and the residue after alkaline treatment is taken to the consumer.
EFFECT: invention enables to extract all valuable components from sewage sludge and create closed cycles on processing media.
2 dwg, 1 ex
