Abstract A rotary disc waste treatment unit having a semicylindrical tank into which liquid waste material is fed. An axial sleeve shaft has end plugs to which end plates are threadably bolted and which in turn carry stub shafts received in bearing supports on opposite sides of the tank. A plurality of radially extending channel members are provided with inner and outer bolt means extending through the channel members, end plates, styrofoam discs and alternately disposed styrofoam ring spacers; the inner ends of the channel members engaging the end plates while the outer ends are in mating contact with the outer styrofoam discs. A series of rotary disc units may be secured together with weirs in between to control the flow of fluid from one waste unit to the next and all of the rotary disc units may be driven by a common motor at a low rate of speed to give maximum exposure of the waste material on the discs to the atmosphere. The styrofoam disc and spacer rings are sufficiently buoyant to offset the weight of the rotary disc units and minimize the power requirements.
The structure of claim 1 wherein bolt means extend through the outer ends of said channel members and said discs adjacent the outer peripheral edges thereof, and spacers disposed between adjacent discs.
Claim 2
Dependent Claim
14 words
The structure of claim 2 wherein said discs are formed of expandable polystyrene material.
Claim 3
Dependent Claim
45 words
The structure of claim 3 wherein said expandable polystyrene material has substantial buoyancy and said disc unit is disposed in a tank a adapted to receive liquid waste material whereby the substantial weight of said disc unit is offset by the buoyancy of said discs.
Claim 4
Dependent Claim
19 words
The structure of claim 4 wherein said expandable polystyrene material has a buoyancy of 60 lb. per cu. ft.
Claim 5
Dependent Claim
38 words
The structure of claim 4 wherein said end plugs are inwardly offset from the opposite ends of said sleeve thereby being in spaced relationship to said end plates bearing directly against the peripheral end edges of said sleeve.
Claim 6
Dependent Claim
44 words
The structure of claim 4 wherein said rotary disc unit in said tank is one of a series of similar units disposed in series whereby liquid waste is fed from one unit to the next unit, each unit having an inlet and outlet side.
Claim 7
Dependent Claim
43 words
The structure of claim 7 wherein said tanks are semi cylindrical in shape and conform substantially to the shape of said disc unit to substantially enclose the bottom half of said rotary disc unit and expose to the atmosphere the other half thereof.
Claim 8
Dependent Claim
42 words
The structure of claim 8 wherein said spacers include inner and outer spacers each of which are ring-shaped and embrace said sleeve shaft and are engaged by said bolt means, and said ring inner and outer spacers are formed from expandable polystyrene.
Claim 9
Dependent Claim
73 words
The structure of claim 8 wherein said semi cylindrical tanks are interconnected and weir means is provided between each to control the flow of liquid waste material from one tank to the next tank, and the first tank having an inlet pipe connected thereto through which liquid waste is adapted to be fed into said first tank and the last tank having an outlet pipe connected thereto fOr discharge of said liquid waste.