METHOD TO BURY CHROME-CONTAINING WASTES Russian patent published in 2012 - IPC B09B1/00 

FIELD: ecology.

SUBSTANCE: invention relates to methods for burial of harmful and toxic wastes, in particular, chrome-containing ones. The method to bury chrome-containing wastes includes combination and layerwise refinement of a waste massif onto an upper insulation layer, a working layer, a protective adsorption layer, a lower insulation layer. The protective adsorption layer is represented by non-toxic industrial vegetable wastes, such as lignin, husks or chips. Insulation layers are industrial wastes of mineral origin, for instance, a lime cake (a mineral waste of sugar production) or slag of a waste incineration plant with an adsorption capacity by a chrome ion of at least 0.56 mg/g and low filtration coefficient. The ratio between the height of adsorption layer and the height of the lower insulation layer must make from 3:1 to 4:1.

EFFECT: method makes it possible to minimise carryover of toxic chrome ions from a massif of a chrome-containing waste, their negative impact to environment and a landfill body, to eliminate the necessity to use containers and warehouses for preliminary stacking and accumulation of huge masses of non-toxic wastes in areas of their occurrence, to increase duration of landfill operation.

3 cl, 2 tbl, 25 ex, 5 dwg