Abstract: A wastewater treatment device including: a vessel having an inlet for receiving an influent stream; and a separator disposed within the vessel. The wastewater treatment device further including: a grit pot connected to the separator; a level sensor configured to output a signal indicative of the level of grit within the grit pot; one or more fluidizing nozzles disposed within the grit pot and configured to deliver a jet of fluid from a fluid supply to fluidize grit accumulated on the lower surface of the grit pot; an extraction outlet connected to a pump for extracting grit fluidized by the fluidizing nozzles; and a controller in communication with the level sensor, wherein the controller and the pump are configured to activate the fluidizing nozzles based on the signal received from the level sensor. There is also described a wastewater treatment device including: a vessel having an inlet for receiving an influent stream; and a separator disposed within the vessel.

Abstract: A wastewater treatment device including a vessel having an inlet for receiving an influent stream, a grit outlet and a floating-matter outlet; a separator disposed within the vessel, wherein the separator comprises a tray assembly connected to the inlet and the grit outlet, the tray assembly including a plurality of nested tray units which define a separator axis and are spaced apart from one another along the separator axis, each tray unit having a substantially conical tray aligned along the separator axis and an aperture in the tray disposed at the separator axis and in communication with the grit outlet, wherein the wastewater treatment device further includes a spray nozzle configured to deliver a jet of fluid towards a surface of water within the vessel, wherein the spray nozzle is angled towards the direction of the floating-matter outlet to force floating matter accumulated on the surface of the water towards and out of the outlet.

Abstract: A wastewater treatment device including a vessel having an inlet for receiving an influent stream, a grit outlet and a floating-matter outlet; a separator disposed within the vessel, wherein the separator comprises a tray assembly connected to the inlet and the grit outlet, the tray assembly including a plurality of nested tray units which define a separator axis and are spaced apart from one another along the separator axis, each tray unit having a substantially conical tray aligned along the separator axis and an aperture in the tray disposed at the separator axis and in communication with the grit outlet, wherein the wastewater treatment device further includes a spray nozzle configured to deliver a jet of fluid towards a surface of water within the vessel, wherein the spray nozzle is angled towards the direction of the floating-matter outlet to force floating matter accumulated on the surface of the water towards and out of the outlet.

Abstract: A stormwater filter comprising: a vessel having an inlet and an outlet; and a screen disposed within the vessel and arranged to divide at least part of the vessel into an upper section and a lower section. The stormwater filter further comprises: a flow splitter positioned adjacent the inlet of the vessel and/or a substantially vertical screen disposed adjacent the outlet in the upper section of the vessel. The flow splitter comprises an inclined leading edge and first and second deflecting surfaces extending from the leading edge. The first and second deflecting surfaces are angled relative to one another so as to direct incoming flow laterally away from an axis between the inlet and the outlet. The vertical screen comprises first and second screen portions which are angled relative to one another. The first and second screen portions are each hingedly connected to the vessel and are detachably coupled to one another at their distal ends.

Abstract: A stormwater filter comprising: a vessel having an inlet and an outlet; and a screen disposed within the vessel and arranged to divide at least part of the vessel into an upper section and a lower section. The stormwater filter further comprises: a flow splitter positioned adjacent the inlet of the vessel and/or a substantially vertical screen disposed adjacent the outlet in the upper section of the vessel. The flow splitter comprises an inclined leading edge and first and second deflecting surfaces extending from the leading edge. The first and second deflecting surfaces are angled relative to one another so as to direct incoming flow laterally away from an axis between the inlet and the outlet. The vertical screen comprises first and second screen portions which are angled relative to one another. The first and second screen portions are each hingedly connected to the vessel and are detachably coupled to one another at their distal ends.

Abstract: A separator module for a stormwater gully chamber is disclosed, the separator module comprising: a partition arrangement which, in use, divides the chamber into an upper region and a lower region, the partition arrangement comprising: an inlet chute having an opening which, in use, provides an inlet to the lower region from the upper region; an outlet chute having an opening which, in use, provides an outlet from the lower region to the upper region; and a weir separating the outlet chute from the inlet chute; wherein at least a portion of the partition arrangement is flexible so as to allow an external diameter of the partition arrangement to be adjusted to fit different sized chambers.

Abstract: A separator module for a stormwater gully chamber is disclosed, the separator module comprising: a partition arrangement which, in use, divides the chamber into an upper region and a lower region, the partition arrangement comprising: an inlet chute having an opening which, in use, provides an inlet to the lower region from the upper region; an outlet chute having an opening which, in use, provides an outlet from the lower region to the upper region; and a weir separating the outlet chute from the inlet chute; wherein at least a portion of the partition arrangement is flexible so as to allow an external diameter of the partition arrangement to be adjusted to fit different sized chambers.