Bi-functional air lift for biological wastewater treatment plants, method of its operation and its use

摘要

The present invention relates to a dual functional air lift for biological treatment plants, which performs the function of a clear water and a surplus sludge lift, wherein both functions are switched only over the operating time of a compressed air source. The object of the invention to provide a fail-safe, self-cleaning water pressure jacks, which consists of a component and it works in a functional unit as surplus sludge lifter and clear water and this can promote the excess sludge directly into a reactor, in the primary treatment or in a sludge storage is achieved in that the two-functional air lift a vertical, open-topped intake pipe (2) with a suction port (3) in its wall and two vertical, mutually parallel compressed air lifting tubes in the form of excess sludge jack tube (4) and a clear water jack tube (5), wherein the intake manifold (2) and the two compressed air lifting tubes at the bottom into a common connection space in the form of a connecting tube (11) open, a compressed air line (9) which is connectable to a compressed air compressor (7), with an air inlet opening (6), which at the junction of the excess siphon pipe (4), the clear water jack tube (5) and the connecting pipe (11) is mounted, wherein the excess sludge lifting tube (4) is open at the top and laterally above the maximum water level (16) in the reactor water (1), in the primary treatment of the sewage treatment plant, into a sludge container (17), into a filter cup / filter bag (19) or into a sludge-stabilizing composter, and the clear water jack tube (5) can be introduced at the top and can be introduced laterally into the sewage plant effluent, and a controller (8) which controls the compressed air compressor (7) the clear water lifting tube (5) is widened in its upper part in the diameter and serves as a water buffer (13) and the suction opening (3) has a downwardly angled open pipe socket which in the wall of the intake pipe ( 2) in the amount of clear water zone (12) of the reactor water (1) is attachable, in which this one-piece pipe system in the reactor water (1) of a biological Kläranla ge is permanently installed.