Advanced Stacked Tray Grit Separation Best performance in the smallest footprint of any grit separation system. The HeadCell® is the ideal grit separator for both new and retrofit applications. The HeadCell® is a multiple tray separator that can be sized to remove fine grit over a wide range of flows with less than a foot of headloss. The HeadCell® provides unparalleled performance in a small footprint. •• Large surface area in a small footprint •• No moving parts or external power source •• Less than a foot (30 cm) of headloss to operate •• Double treatment capacity in the same footprint as existing equipment •• Economical to own and operate •• Easily accommodates high turndown ratios •• New wastewater treatment plants •• Treatment plant retrofits •• Sediment removal pretreatment for potable water •• Grit removal for industrial effluent •• Pre-treatment for MBR and any other advanced processes The stack of hydraulically independent polyethylene trays are submerged in a concrete chamber. Screened sewage enters the influent duct and passes into the grit chamber. The influent duct directs the flow into the high efficiency distribution header to evenly distribute the influent tangentially into the modular multipletray system. Tangential feed establishes a vortex flow pattern causing solids to fall into a boundary layer on each tray. Grit settles out by gravity along the sloped surface of each tray and then solids are swept to the center opening which allows them to fall to a common collection sump. Degritted effluent flows out of the trays, over a weir and into an effluent trough. Often, the settled solids are continuously pumped from the grit sump to an open vortex grit washing system (GritCup®/ TeaCup®/SlurryCup™) and then dewatered by either a Grit Snail® dewatering escalator or SpiraSnail®, depending on grit load. An intermittent pumping configuration is also available. Effluent Settling Trays SlurryCup™, TeaCup® or GritCup® washing Distribution Header Grit Snail® or SpiraSnail® dewatering Underflow Collection Sump

•• The HeadCell is typically placed in a square concrete tank downstream of influent screening eliminating the need for a long approach channel and complicated concrete design. Inlet and outlet orientation and location can be configured to meet many design requirements. ® HeadCell® Performance •• Removes 95% of particles equal to or greater than 75 micron (µm) at the design flow rate •• Less than 15% volatile solids and greater than 60% total solids when used with Hydro washing and dewatering equipment •• The HeadCell® may fit into existing basins which can significantly reduce total installed...