COLORADO SPRINGS, Colo. (KRDO) - The City of Colorado Springs has started the installation process for a new aeration system that will combat blue-green algae in Prospect Lake in Memorial Park.

Over 60 percent of all wastewater treatment plants in the developed countries use the activated sludge process as their secondary treatment system. About 50 to 85 percent of the total energy consumed ...

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Several flow systems for use with the step aeration process were examined under optimal operating conditions: completely-mixed tanks-in-series systems, plug-flow systems, and a composite of the two.