An apparatus for refining a liquid stream using 180 degree redirection and inclined plates. The apparatus includes a first flow chamber, a second flow chamber, and a separation chamber. The first flow chamber directs the liquid stream downwards in a first direction at a first velocity, the second flow chamber directs the liquid carrier upwards in a second direction opposite the first direction, and the separation chamber is disposed between the first flow chamber and the second flow chamber. The separation chamber includes a redirection portion that has inclined plates across which the liquid carrier flows and, as the liquid slows from a first velocity to a second velocity, the solid particles fall out of the liquid carrier and collect in the collection portion of the separation chamber.

The invention relates to a waste water treatment plant including at least a multi-step water treatment reactor arranged for receiving influent waste water, for carrying out at least a biological step and a sedimentation step and for providing effluent pure water, by means of an effluent weir. The wastewater treatment plant further includes means for increasing the sedimentation velocity, and means for hindering floating elements to get into the effluent weir.

There is described a tray unit for a wastewater treatment device. The tray unit has a substantially frusto-conical profile defining an axis and a central aperture. The tray unit comprises a plurality of distinct tray sections arranged around the axis. Each tray section comprises a portion of the substantially frusto-conical profile of the tray unit and is connectable to one or more of the other tray sections so as to form the tray unit. There is also described a method of assembling a tray assembly for a wastewater treatment device. The method comprises the steps of: providing a plurality of tray units, the tray units each having a substantially frusto-conical profile and a central aperture and comprising a plurality of connecting lugs each defining a hole; attaching a first one of the tray units to a plurality of support members by inserting the support members through the hole of the connecting lug of the first tray unit and securing the first tray unit to the support member; and attaching a second one of the tray units to the plurality of support members by inserting the support members through the hole of the connecting lug of the second tray unit and securing the second tray unit to the support member to form an assembly of tray units.

There is described a tray unit for a wastewater treatment device. The tray unit has a substantially frusto-conical profile defining an axis and a central aperture. The tray unit comprises a plurality of distinct tray sections arranged around the axis. Each tray section comprises a portion of the substantially frusto-conical profile of the tray unit and is connectable to one or more of the other tray sections so as to form the tray unit. There is also described a method of assembling a tray assembly for a wastewater treatment device. The method comprises the steps of: providing a plurality of tray units, the tray units each having a substantially frusto-conical profile and a central aperture and comprising a plurality of connecting lugs each defining a hole; attaching a first one of the tray units to a plurality of support members by inserting the support members through the hole of the connecting lug of the first tray unit and securing the first tray unit to the support member; and attaching a second one of the tray units to the plurality of support members by inserting the support members through the hole of the connecting lug of the second tray unit and securing the second tray unit to the support member to form an assembly of tray units.

The invention relates to a waste water treatment plant comprising at least a multi-step water treatment reactor (1; 101) arranged for receiving influent waste water, for carrying out at least a biological step and a sedimentation step and for providing effluent pure water, by means of an effluent weir (4; 41, 42, 43), characterized in that there are providedmeans for increasing the sedimentation velocity (6), andmeans for hindering floating elements (10) to get into the effluent weir (8; 81, 82, 83).

An apparatus for refining a liquid stream using 180 degree redirection and inclined plates. The apparatus includes a first flow chamber, a second flow chamber, and a separation chamber. The first flow chamber directs the liquid stream downwards in a first direction at a first velocity, the second flow chamber directs the liquid carrier upwards in a second direction opposite the first direction, and the separation chamber is disposed between the first flow chamber and the second flow chamber. The separation chamber includes a redirection portion that has inclined plates across which the liquid carrier flows and, as the liquid slows from a first velocity to a second velocity, the solid particles fall out of the liquid carrier and collect in the collection portion of the separation chamber.

An apparatus for refining a liquid stream using 180 degree redirection and inclined plates. The apparatus includes a first flow chamber, a second flow chamber, and a separation chamber. The first flow chamber directs the liquid stream downwards in a first direction at a first velocity, the second flow chamber directs the liquid carrier upwards in a second direction opposite the first direction, and the separation chamber is disposed between the first flow chamber and the second flow chamber. The separation chamber includes a redirection portion that has inclined plates across which the liquid carrier flows and, as the liquid slows from a first velocity to a second velocity, the solid particles fall out of the liquid carrier and collect in the collection portion of the separation chamber.