Patent ID: 8431022

Claim:
A modular dual vessel dissolved aeration flotation treatment system, comprising: a frame; first and second treatment sections mounted to the frame adjacent to each other, each treatment section including: a separation tank having a volume defined by a bottom wall, opposing first and second end walls each extending from a bottom portion connected to the bottom wall to a top portion, and opposing parallel inside and outside side walls each extending from a bottom portion connected to the bottom wall to a top portion, wherein the first and second treatment section inside side walls form a common inside wall section; a sludge plate extending transversely from the inside side wall to the outside side wall and extending longitudinally from the interior of the separation tank at a height below the liquid operating level of the system to at least the upper edge of the separation tank second end wall, the sludge plate oriented at an inclined angle from horizontal; a flocculator portion having an inlet to receive a waste water stream, an outlet to discharge into the separation tank, an aeration mixing chamber disposed between the flocculator inlet and outlet, an aeration injection port proximal to an upstream end of the aeration mixing chamber, and a chemical injection port disposed between the flocculator inlet and the aeration injection port; an effluent weir mounted within the separation tank at a depth proximal to the bottom portions of the inside and outside side walls but set off from the bottom wall, the effluent weir having an enclosed top portion and a bottom inlet and a discharge in fluid communication with a clear well riser; a clear well adjacent to the separation tank, the clear well defined by a bottom wall and enclosing side walls, each clear well side wall extending from a bottom portion connected to the clear well bottom wall to a top portion, the clear well further including a clear well discharge to discharge treated water; a clear well riser extending from a bottom portion in fluid communication with the effluent weir discharge to a riser discharge within the clear well, wherein the height of the riser discharge is lower than clear well side wall top portions and defines the liquid operating level of the system; and, an aeration injector having an inlet in fluid communication with the clear well and a discharge in fluid communication with the flocculator aeration injection port; a surface skimmer mounted to the first and second treatment sections; and, a sludge collection section adjacent the second end walls of the first and second treatment sections to receive retentate from the surface skimmer; wherein, the first treatment section and second treatment section may operate independently of each other.