RECLAMATION OF LANDS OCCUPIED BY SLIME PITS CAUSED BY OIL-AND-GAS PRODUCTION Russian patent published in 2013 - IPC B09C1/08 B09B3/00 

FIELD: process engineering.

SUBSTANCE: invention relates to reclamation of lands contaminated in oil-and-gas production, particularly, those occupied by slime pits. Proposed method comprises introducing thickener into oil-and-production wastes and mixing it over entire volume thereof to homogeneous state. Said thickener represents a bentonitic clay and is taken in amount of 50% of total volume of pit wastes. Thickening and mixing over, peat-sand mix is filled in pit to make it surface level with surrounding terrain relief. Then, second layer of peat-sand mix premixed with ammonium nitrate in amount of 180-220 kg/hec and potassium salt in amount of 130-170 kg/hec is placed onto said surface area. Now, seed of permanent cultures are sown taken in amount of 120-150 kg/hec.

EFFECT: better ecological compatibility of lands and water-physical properties.

2 ex