The operators of the Sunbelt Wastewater Treatment Plant arrive for their day shift and notice an unusual odor around the grounds.
After a morning briefing with plant personnel about daily duties, the chief operator (Joe) and shift operator (Bob) head out to investigate. They find an unusual sight: foam billowing in the aeration tanks and a very noticeable sour, chemical-like odor.
The clarifiers also look odd: Clouds of solids are rising and extending throughout the water, and the normally clear supernatant now has a greenish, turbid appearance. Large, irregular floc particles can be seen going over the effluent weirs.
Comparing solutions
Joe and Bob
