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Theory of Operation
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Septage Receiving Screen
Theory of Operation
High flow-rates in small footprints are easily achieved through the patented design of the
Septage Receiving Station. When installed properly one screen actually serves as two units,
splitting the flow and separately screening with two grids. This allows for more grid area in
the given channel and therefore much less headloss than other designs.
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Flow passes into the screen and out through the grid on each side. While passing through the sides,
solids are intercepted and collected by the continuously moving grid. Stainless steel foot prevents
solids from bypassing under screen while restricting grit in the unit. Solids are transported around
the inside perimeter to top of screen as flow is constantly presented a clean grid surface. As
screenings go up and around top of screen they are washed off via spray nozzles into a dewatering trough.
After water and organic material has been removed from the screenings and returned to the channel screenings
are compacted and conveyed into a container appropriate for disposal.
Minimal friction is achieved through the use of Ultra High Molecular Weight Poly Ethylene (UHMWPE) and
Stainless Steel wear surfaces. Machined delrin spacers precisely separate every element, eliminating
metal-on-metal wear and extending life of grid. This reduces power requirements and maintenance. Wide
tracks and generous radiuses ensure years of trouble-free operation. Stainless steel grid elements provide
superior strength while reducing area and headlosses. Unlike plastic elements, our heavy gauge stainless
steel links are not susceptible to breaking or snapping off and damaging down stream equipment.
Over the years, and through countless installations, this screen has continued to evolve into what it is today.
While many of the early models built in our shop have been operating since the early 1990's, we feel that this
screen is second to none when high flows cannot generate high headloss. Our screens are designed for engineers
to get the most out of their system, operators and superintendents to maximize their budgets, and maintenance
crews to forget they have them. |
