METHOD OF PRODUCING NUTRIENT SOILS BASED ON MECHANICALLY DEHYDRATED SEWAGE SLUDGE (OPTIONS) Russian patent published in 2018 - IPC C05F7/00 C02F11/00 

FIELD: agriculture.

SUBSTANCE: inventions relate to agriculture. Technology of the method consists in preparing an active mixture from the adsorbent and inert material, mixing the active mixture and mechanically dehydrated sewage sludge and drying the mixture to a humidity of 0–20 %. To meet the technical requirements for nutrient soils, clay additives are added to the mixture depending on the cation exchange capacity of the inert material. In various process variants, a reagent is added to the active mixture from the humates, dilution of the mixture with an inert material is carried out before and after drying.

EFFECT: inventions allow to reduce the hazard class of neutralized sewage sludge and to shorten the preparation time of the nutrient soil.

25 cl, 10 dwg