METHOD FOR RECLAMATION OF SLUDGE TANK TANK ENTERPRISES FOR PRODUCING BLEACHED SULFATE PULP Russian patent published in 2022 - IPC C02F11/14 B09B3/70 

FIELD: waste processing.

SUBSTANCE: invention relates to the processing of waste from industrial enterprises for the production of bleached pulp using the sulphate method. The method for reclamation of the territories of enterprises for the production of bleached pulp includes mixing lignin sludge with ash from a thermal power plant to obtain a substrate. In the winter season, a slot is cut in the ice cover of the sludge trap, through which the lignin sludge is first degassed and dehydrated in turn, mixing it with dry loose ash. Then the resulting substrate is neutralized in the same way, mixing it with dry carbonate flour and zeolite, and then it is strengthened by mixing with a binder material, thus forming a soil-sludge lignin substrate. In the warm season, melt water is removed from the surface of the soil-sludge lignin substrate and the substrate is reinforced with crushed stone, ramming it into an array in the form of crushed stone piles, and the surface of the substrate is covered with a mixture of soil and bark and wood waste.

EFFECT: elimination of the negative impact of the enterprise's waste on the natural area, as well as ensuring the implementation of waste processing on the ice surface.

4 cl, 1 dwg, 1 ex