RU2619252C1 - Method for bioremediation of soils polluted by plastic mineralized water - Google Patents

Abstract

FIELD: biotechnology.

SUBSTANCE: sea aster (Aster tripolium) is used as a halophyte, before sowing, 2-3 cm deep furrows are prepared, or halophyte seeds are mixed with sand in order to reduce the degree of their exposure to wind currents. Application of the proposed method allows to shorten the period of saline soils restoration 1.7-2 times, and seed consumption is about 1 seed per 1 cm² of soil. The invention can be used in agriculture for saline land reclamation.

EFFECT: reduction of the restoration period for soils contaminated with stratal mineralized waters entering and pouring to the surface of the Earth during liquid hydrocarbons production by growing halophytes of the Aster tripolium species.

Description

The invention relates to biotechnology of environmental protection in the field of oil industry and can be used in the rehabilitation of saline soils.

During the production of liquid hydrocarbons from the bowels of the earth, the so-called fluids arrive upward, i.e. oil (about 10%) and formation mineralized water - PMV (about 90%). After the separation process, marketable oil goes to oil refineries (refineries), and PMV is pumped back into the oil-bearing formation.

PMV is a very aggressive liquid, a solution of various toxic salts. It corrodes pipes and often pours out. This leads to salinization of the soils of deposits - technogenic halogenesis.

A known method of desalination of the soil, including the supply of water to the root zone and the removal of salts from the upper soil layer, which is carried out using halophyte plants sown on the irrigated area, followed by mowing and withdrawal from the site [SU No. 1611242, publ. 12/07/1990].

A known method of reclamation of saline soils, including the sowing of halophytes on the soil with their subsequent cleaning. According to the invention, European halophytes and / or pineal sarsazan are used as halophytes, and their sowing is carried out together with xeroform plants by cocpec and / or biyurgun [RU No. 2108016, publ. 04/10/1998].

A known method for the development of saline medium loamy lands, including sowing halophytes in their pure form with their subsequent harvesting [RU No. 2034900, publ. 05/10/1995].

In the climatic conditions of Western Siberia, these methods are ineffective.

Closest to the invention in technical essence is a method for the development of saline medium loamy lands, including the sowing of halophytes in pure form with their subsequent harvesting.

A method for bioremediation of soils contaminated with formation mineralized waters is proposed, which is aimed at reducing the recovery period of soils contaminated with formation mineralized waters entering and spilling onto the Earth's surface during the extraction of liquid hydrocarbons by growing or using halophytes of the Aster tripolium species (Astra Solonchakova).

The method is as follows.

Territories prone to halogenesis are delineated and sown with aster seeds with a salt marsh or sand-seed mixture. Aster tripolium grows well on moist soils typical of Western Siberia, and when growing in its tissues, it accumulates a large amount of salts. By creating furrows with a depth of 2-3 cm or mixing halophyte seeds with sand, their exposure to wind flows is reduced. In order to prevent salt from entering the soil a second time, at the end of the flowering period of the salt marsh aster, the phytomass is harvested.

Application of the proposed method allows to reduce the recovery period of saline soils by 1.7-2 times and seed consumption during sowing is about 1 seed per 1 cm ^{2 of} soil.

Claims (1)

A method of bioremediation of soils contaminated with formation mineralized waters, including sowing halophytes with their subsequent harvesting, characterized in that seeds of the Aster tripolium species are used, before sowing of which they prepare 2-3 cm deep furrows or mix halophyte seeds with sand to reduce their exposure to wind streams.