Once the reactor is full, it enters the “React” cycle. During the React cycle, large amounts of air are added to the wastewater in order to activate the microorganisms that stabilize the wastewater through chemical reactions of oxidation and synthesis.
Once the microorganisms have had time to react, the air is turned off and the reactor enters the “Settling” cycle. In the Settling cycle, the heaviest solids settle to the bottom of the reactor and the cleanest water is left on top.
After enough time settling, the water is clean enough to enter the “Decant” cycle, during which the cleanest water from the top is removed through a floating mechanism called a “decanter”. When the clean water has been removed from the top of the reactor, the process enters the final step, known as “Idle”. During the Idle phase, the water from the bottom of the reactor, which contains the heaviest materials known as sludge are pumped out of the tank. Some of this sludge is pumped back into the reactor later and some of it is pumped to a holding area until it can be reused or disposed of.
The clean water that was removed during the Decant cycle is purified even more by flowing through a filter system that was installed in 2006. After being filtered,our water is disinfected using Chlorine. Then the clean, disinfected water can be returned to the environment.
from your Friends at the Utilities Board of the City of Oneonta, ALABAMA!