FIELD: biotechnology.
SUBSTANCE: invention refers to biotechnology, namely to oil industry. Method of utilizing spent cleaned proppant in extreme North conditions envisages soil treatment with a mixture containing oil-destroying microorganisms, nitrogen-phosphorus fertilizer and adsorbent. Proppant is poured with excess liquid sludge of pig-breeding effluents of biological treatment facilities, and before introduction into soil, a layer of superabsorbent granules with water-absorbing capacity is coated. Mixture is frozen. Superabsorbent granules act as aggregator of liquid sludge capable of absorbing water with sludge with subsequent freezing and solidification of the mixture into pieces of proppant. Then the pieces are split at the prepared site in the form of briquettes. At that, briquettes of purified proppant by amount of their filling with sludge or freezing in granules of superabsorbent correspond to amount mixed with water for introduction into soil required for distribution along contaminated area and buried into soil. As proppant lumps are melted, sludge freed from granules of superabsorbent and water is used for growth of plants naturally growing in this section.
EFFECT: invention increases degree of purification from oil and oil contaminants.
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