The device comprises a dome which is formed as a protective tube (1) made of polymer material, collecting the gas that emerges from the deposit material and emitting it into the atmosphere, through a bio-filter (3). The dome has a cartridge-type container (2) which is arranged in the lumen (11), for fitting the bio-filter material which is inserted at a distance from the inner periphery of the protective tube. The cartridge-shaped container is provided with an apertured plate (21) facing the deposit material. The intermediate space (14) between the inner periphery of the protective tube and the outer periphery of the cartridge-shaped container, is sealed against ingress of deposit gas. The outer periphery of the protective tube is connected via a ring sleeve (M) of polyethylene with the deposit cover (D) in a gas and fluid-tight manner.
