At peak hourly flow: SORp < 1500 gpd/sf;
Distribute flow equally both horizontally & vertically;
Eliminate corner pockets and dead ends;
Maintain velocity of inlet channel> 1.0 fps;
Baffle of full-width, 6" below the water surface and12" below the inlet orifice bottom.
Figure 8. Inlet Structure
Adjustable weir for leveling;
V-notch or flat weir under free fall flow;
Weir rate 10,000 gpd/ft - 15,000 gpd/ft.
Figure 9. Outlet Structure
Tilting scum trough extends the full width, close to outlet and stop the loss of scum into effluent; Blade scraper manually or mechanically scrap scum.
Scum transport and handling
Keep mixing and maintain warm temperature in tank during pumping;
Standby pump and cleanout, flushing connections.
Conveyor chain and flights or travelling bridge;
Collector linear speed = 2 fpm - 3 fpm;
Cross screw collector rotates at 10 rpm.
Hopper bottom width, 2 ft;
Extra depth are not acceptable to avoid septic.
Sludge line > 6";
Shortest and straight suction pipes;
Continuous or interval withdrawal;
Flushing water connected to suction & discharge lines.
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