Solving The Riddle Of High CBOD Readings

A plant team in Alabama leaves no stone unturned in finding the cause of apparently elevated weekly average CBOD levels.
Solving The Riddle Of High CBOD Readings
Plant team members who solved the CBOD riddle are, from left, Damon Chambers, operator; Andrew Douglas, project manager; and Houston Black, operator.

Since June 2012, the 0.995 mgd Hanceville (Alabama) Wastewater Treatment Plant had met all NPDES discharge permit limits set by the state Department of Environmental Management.

However, August 2014 brought two violations: one for CBOD weekly average concentration, and one...

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