Aeration hose has radial expansion limits - between the joints linking the hose to the inner support pipe

摘要

The aeration hose (24) has at least one expansion limit (26) at the length section between the joints (25) with the support pipe (14). It prevents, or at least restrains the radial expansion exerted by the overpressure against the inner side of the aeration hose. A number of expansion limits (26) are evenly distributed between the joints (25) of the aeration hose (24) with the support pipe (14). The support pipe (14) is open at one end, and has a dividing wall (17) at the other end. The connection (15) and its passage openings (14) pass from the open hollow zone (18) to the outer side. USE/ADVANTAGE - The support tube is covered at sections by an aeration hose for the biological treatment of sewage and the like, to introduce oxygen for biological degrading. The introduction of the air in relation to the energy consumed is maintained over a long period, or the energy is at least slowly reduced and, in the long term, does not decline as strongly as with conventional aeration tubes.