Atlanta-Fulton County, Ga., needed effective technology to remove suspended solids from raw water drawn from the Chattahoochie River. The utility constructed a new 45 million gallon per day water treatment plant in 1991, and then increased design flow to 90 mgd in 1995, to keep up with growing population.

Raw water enters the plant at 15-20 NTUs (turbidity), and the plant must meet state and federal standards of 0.5 NTUs.

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