METHOD OF BIOLOGICAL CLEANING FROM OIL PRODUCTS OF SOIL IN AGRICULTURAL LANDS Russian patent published in 2019 - IPC B09C1/10 

FIELD: agriculture.

SUBSTANCE: method of biological purification from oil products of soils of agricultural lands, including the introduction of a natural sorbent – a source of macro- and microelements, organic fertilizer, sowing of annual grasses. In the spring, in the cleaned soil, if necessary, previously plowed, make hydroponic, produce cultivation with harrowing to a depth of 25–30 cm, then spend watering with water to bring the soil moisture to at least 60 % of the maximum soil moisture capacity. Then a mixture of peat, granulated carbonate sapropel, potassium chloride, superphosphate and ammonium nitrate in a ratio of 30:60:1:1.8:2 is introduced into the soil. Hyperol is made at the rate of 1:10 by the mass of the introduced sapropel. After that, the soil is re-cultivated with simultaneous harrowing to a depth of 25–30 cm, after which the perennial grasses are sown under the cover of annuals, cultivated, followed by annual cutting at the end of the first growing season and perennial cutting at the end of the second growing season.

EFFECT: use of the proposed method provides almost complete cleaning of contaminated soil from petroleum products, improving its structure and restoring fertility.

1 cl, 3 ex