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Dis-infection Self Clean Sand Filters / Clarifiers - Model 474

Supplier: Absolute Filters

The influent flows through the inlet pipe, proceeds through a distribution system, and then moves outward and upward around a distribution cone and through the sand media. Concurrently, the sand is moving downward, which entraps the debris (colloids). The sand, the debris (colloids), and a small portion of effluent continues flowing downward through the cone-shaped bottom and into the fluidized bed.

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Filtration occurs as the influent passes through the sand. The filtered fluid now rises to the top of the sand filter and enters the outflow pipe and flows downward to the outlet.

From the fluidized bed, the sand and debris (colloids) enter a scouring chamber where pressurized air (factory supplied) swirls, scours and loosens the wet sand and debris (colloids).

This pressurized air is also used to move the sand and debris (colloids) up through the lift pipe, which is part of the fluidized system, and back into the top of the sand filter.

From here, the sand and debris (colloids) enter into a two-stage separator. The clean sand flows downward into the sand filter for re-use; the debris (colloids) now flows out of the sand filter through the top drain.

At this point, the debris (colloids) that were discharged through the drain of the sand filter enters the Model 290 Cascading Strainer.

The debris (colloids) is caught in a catcher and then can be hauled away to a landfill or recycling process. The water remaining in the Model 290 Cascading Strainer is then sent to the Model 611 Simplex Bag Filter for final filtration.

Now the fluid is ready for re-injection into the sand filter. The final result is "ZERO LIQUID DISCHARGE".

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