FIELD: agriculture.
SUBSTANCE: drain opening is closed with the plug with a branch pipe provided with a branch with a valve and a dispensing container. The branch is connected by the hose to the exhaust pipe of the internal combustion engine, and the exhaust gases are fed into the drain cavity. The dispensing container is filled with fine powder of colloidal copper. The valve is opened, and the powder is fed into the drain cavity. The supply of gases is stopped when the dispensing container is completely empty. The colloidal copper powder together with the stream of exhaust gases is fed onto the inner surface of the drainage pipes and the slits of the drainage pipes.
EFFECT: increased intensity of suppression of life activity of iron bacteria.
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