Silo gas is a swift and silent killer and should not be treated lightly. It forms as a result of chemical reactions that begin as soon as chopped plant material is put into a silo. Silo gas can contain Nitrogen dioxide (NO2) and other gases. In low concentrations, exposure to NO2 can lead to extensive lung damage and even short duration exposures may lead to chronic respiratory problems. At high concentrations, these contaminants could result in death. NO2 dissolves in the moisture of the lungs and forms an acid that burns the sensitive tissues, and stops the oxygen supply to the body - causing massive bleeding and a quick death. Carbon dioxide (CO2) is also produced during the silage making process. When inhaled, high levels of CO2 can result in asphyxiation. These hazards should not be disregarded and precautions should be taken. The following information gives you an overview of the signs, risks and protection strategies involved when working in confined space silos.

Protection Against NO2 and CO2