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The Richmond Wastewater Treatment Facility has a design flow of 18 mgd. The stair-step configuration of nine aeration treatment trains is visible at the right.
The Richmond Wastewater Treatment Facility was regularly meeting its permit limit of 1.0 mg/L effluent phosphorus.
The only trouble was that doing so required the addition of alum, which had once cost about $250,000, upstream of the final clarifiers.
To address that issue,...
