METHOD FOR RECULTIVATION OF SLUDGE RESERVOIRS OF ENTERPRISES FOR PRODUCTION OF BLEACHED PULP BY THE SULFATE METHOD Russian patent published in 2019 - IPC C02F11/00 

FIELD: ecology; waste processing and recycling of wastes.

SUBSTANCE: invention relates to environmental protection, namely for the joint grouting of industrial waste and sediments from industrial enterprises for production of bleached pulp. Method for the recultivation of sludge collectors of enterprises for production of bleached pulp by the sulphate method is described, including the mixing of sludge waste from production of pulp and cardboard – lignin sludge with a binder mixture – ash from burning coal, characterized in that, as a binder mixture, gypsum, marble chips and cyclone dust of silicon are additionally used in the following ratio of components (t/m³): lignin sludge (m³) – 1.00; gypsum – 0.50–0.60; ash – 0.30-0.40; cyclone silicon dust – 0.10÷0.30; marble crumb – 0.40÷0.60; then the said material is mixed and after the end of the mixture setting, a stone-like monolith is obtained, within which toxic substances are firmly bound.

EFFECT: method for the reclamation of sludge collectors has been proposed, which makes it possible to eliminate the negative impact of the waste of enterprises producing pulp by the sulfate method on the environment.

5 cl, 1 dwg, 2 tbl, 2 ex