Patent ID: 9133042
Filing Date: 2015-09-15
Classification: C02F,Y02W

Abstract:
1. A wastewater treatment facility with one or more rotating biological contactors, the facility comprising: a rotatable shaft that is supported over a wastewater influent; a control system in communication with the rotatable shaft for influencing rotational speed of the shaft, its time of rotation, its angular acceleration and its direction of rotation so that an overloaded accretion of biomass on the disk can be avoided by monitoring current flow (I) or power (W) if the current flow required to drive a motor and a reducing gear box and thus rotate the shaft exceeds a given amount, the current is reduced, then the rotational speed of the shaft diminishes and its direction of rotation can be reversed if desired after a period of rest, the control system also providing a slow buildup in speed as the shaft's rotational speed rises from 0 to a desired angular speed; one or more stages for purifying the wastewater influent, at least one of the one or more stages being oriented transversely to the rotatable shaft and having one or more disk assemblies, with a number of disks, at least some of the disks comprising an inner planar one-piece surface that surrounds the shaft to promote biomass slough off and one or more concentric rings of segments that circumscribe the inner planar surface, wherein the inner planar surface defines a non-circular aperture that receives the rotating shaft, the aperture receiving the shaft in registration so that the shaft and the disk move in unison without slippage, the concentric rings of segments including on or more intermediate rings with segments that are joined to the periphery of the inner planar one-piece surface and an outer ring of segments that are connected to the periphery of the one or more intermediate rings, at least some of the segments being provided with: at least some of the disks also having: