SU376074A1 - O! OENA1§ ъ1?: I - Google Patents

Description

one

This invention relates to the field of veterinary medicine.

The known method of disinfecting the soil, based on the introduction into the soil of disinfectants, such as ethylene gas with methyl bromide, is designed to decontaminate limited soil areas, requires special technical equipment and provides soil decontamination to an insignificant depth.

According to the proposed method for deeper disinfection without disturbing the soil structure, a film is attached to the contaminated area parallel to the surface of the earth, the edges of which are added dropwise with earth, open vessels are placed under the spittle into which liquefied gas is poured. And in order to increase the depth of disinfection in case of a spore infection, for example, a Siberian ulcer, open pits are dug up on the infected area before it is covered with film.

The method is carried out as follows.

The area of soil to be decontaminated is dug round with a ditch, not less than 40 cm in depth, and covered with a polyamide film of the PK-4 brand in such a way that the air surface is 15-20 cm high. Then the ends of the coating are dipped into the formed ditch and sealed with using an earth castle.

The special system that is formed in such a closed system from the cylinder through the rubber hose and the special fitting built into the film coating serves liquid OKEBM gas — a mixture of 1 g of ethylene oxide and 2.5 g of methyl bromide, which is distributed through tees into the vessels installed under the coating. Depending on the average temperature under the coating and the total surface area of the vessels, self-evaporation of a given dose of the liquid phase of the preparation lasts 6-24 hours. A slowly evaporating gas fills the air space of a closed volume and, possessing an extremely high penetrating power in the gas phase, gradually evades the soil to a depth of 100-125 cm as it evaporates, is sorbed uniformly by all soil layers of the area being disinfected and under certain conditions ( concentration, exposure, temperature and soil moisture) provides a disinfectant effect. The magnitude of the modes that provide for soil disinfection in horizons of depth from 0 to 200 cm is directly dependent on the required depth of disinfection. So, when using OKEBM gas at the rate of 0.5 and 1 kg per 1 m and exposure, respectively, 10 and 5 days, disinfection of the soil contaminated with spores of Lacs. anthracis is reached at depths from 0 to 30 cm; at a flow rate of 2 kg and an exposure of 10 days - at a depth of 100-125 cm. Reliable disinfection of soil at a depth of 200 cm is reached after 10 days at a flow rate of 3 kg of OKEBM gas per 1 L {2 area. However, to obtain Hia decontamination at the indicated depth, it is necessary to form open pits (earth drill) with a diameter of 15 cm and a depth of 1 m in the decontaminated part of the soil at the rate of one hole for every 10 m of the decontaminated area, Adi. Otherwise, the specified mode provides decontamination only to a depth of no more than 100-125 cm. Effective soil decontamination for Siberian animals in horizons from 0 to 200 cm in depth using OKEBM gas in the above modes is obtained only at soil temperature not lower than 10 ° C and humidity it ranges from 10 to 25%.

The proposed method for introducing an OKEBM gas in liquid form with its subsequent gradual self-evaporation from open vessels makes it possible to create a sporicidal concentration of the drug in a closed volume without significantly increasing the pressure in it and, thus, to prevent the film from being broken from breaking, and also to significantly reduce leakage of active substance through the intact wall of the film due to its partial natural permeability. The sporicidal concentration of gas OKEBM when disinfecting soil with undisturbed structure to a depth of 200 cm is 2-3 times higher compared to the dose of gas OKEBM, which provides disinfection of various materials when loaded into hermetic volumes in bulk.

Subject invention

Claims (2)

1. A method of disinfecting the soil, based on the introduction into the soil of disinfectants, such as a gas mixture of ethylene oxide with methyl bromide, characterized in that, in order to deeper disinfection without disturbing the soil structure, over the infected In a section parallel to the surface of the earth, a film is pulled, the edges of which are added dropwise with earth, and open vessels are placed under the film, into which liquefied gas is poured. 2. A method according to claim 1, characterized in that, in order to increase the depth of disinfection in case of a spore infection, such as the Siberian Zvez, open holes are dug up in the infected area before it is covered with film.