Abstract A sewage treatment system comprises a tank containing sewage to be aerated and circulated by an aeration rotor partially immersed in the liquid in the tank. The aeration rotor is suspended from a floating carrier frame including a platform supporting the driving motor for the aerator and a plurality of supporting rods extending in radial planes outwardly and downwardly inclined from said platform. The supporting rods extend with their outer ends through rough spherical floating bodies floating on the liquid to be treated in the tank. The free ends of the supporting rods projecting beyond said floating bodies are guided in vertical guide channels formed on the internal tank wall to hold said carrier frame against rotation in said tank but permitting unrestrained upwards and downward movement of the carrier frame according to the level of the sewage in the tank.
A sewage aeration system comprises a tank containing liquid to be aerated, a floating carrier frame, aerating means including a motor driven aeration rotor mounted on said frame for rotation about a substantially vertical axis with a portion of said rotor immersed in the liquid, said frame including a platform with a plurality of supporting rods fixedly secured to said platform and extending outwardly and downwardly therefrom, a float body slidably mounted on each of said rods for supporting said platform sufficiently above the liquid level to support said rotor partially immersed in the liquid, vertically extended guide means extending from the inner side of said tank, and guide pin means on the outer ends of said rods loosely engaging said guide means whereby said platform and the motor driven rotor supported thereon can move freely in a vertical direction within said tank in accordance with changes in the liquid level.
Claim 2
Dependent Claim
49 words
A water aeration system according to claim 2, in which said supporting rods penetrate through said float bodies and the outer ends of the supporting rods emerging from the bodies carry a guide pin of adjustable length cooperating with said guide means on the inner wall of said tank.
Claim 3
Dependent Claim
50 words
An aeration system according to claim 2, in which a guide tube is fixedly inserted into said float body and traverses the body according to a diameter thereof, said supporting rod passing through said guide tube and means being provided for removably securing the supporting rod to said guide tube.
Claim 4
Dependent Claim
39 words
An aeration system according to claim 4, in which said guide tube is provided with radially extending arms abutting against an internal partition wall of the float body situated at right angles to the axis of said guide tube.
Claim 5
Dependent Claim
43 words
An aeration system according to claim 4, in which said float body comprises a partly spherical external layer of plastic material, the portion of said spherical layer defined by said external layer and said diametrically extending guide tube being filled with foamed plastic.