Step 3: Anoxic Tanks
Step 3 in the Eco Machine™ at the OCSL is the anoxic tanks. Two 5,000 gallon tanks are located underground, right next to the constructed wetlands at the OCSL. Here, naturally occurring microbial organisms use the wastewater stream as food. They begin to digest ammonia, phosphorus, nitrogen, potassium, and many other substances in the water. This process happens with very little oxygen (called either anaerobic or anoxic) and produces a modest amount of methane gas, though not enough to harvest and use as an energy source.
When it's time for the water to move to step 4 of the Eco Machine™ process at the Omega Center for Sustainable Living, the constructed wetlands, a splitter box evenly divides the water in half and distributes it between the upper two wetlands.