After batch treatment, wastewater is transferred to one of two 250,000 gallon equalization (EQ) storage tanks. Contaminants remaining in the water at this point are removed through an additional series of chemical reactions and physical separation.

At this stage, the water is also conditioned for biological treatment.  Optimal performance of the biological treatment system can only be achieved when the pH, flow rate, and composition of the wastewater are strictly controlled. Therefore, when the wastewater reaches the EQ tanks, large mixers create a homogeneous composition, and the water re-enters the plant at a constant flow rate, which is adjustable up to 800 gpm to meet throughput demand.

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