Dissolved Oxygen Concentrations
Dissolved
Oxygen Saturation Using the RNAS, Inc. O2Zone System
The O2Zone System (Patent 6,561,497) produces consistently
high dissolved oxygen concentrations by increasing the partial pressure
of oxygen in gas that contacts the treated water. Rather than using air
for an oxygen supply, pressure swing adsorption (PSA) oxygen generators
are used to remove nitrogen from air to produce 90% to 95% pure oxygen.
To further increase the oxygen partial pressure in the spray chamber a
backpressure valve is used to maintain a pressure of 5-15 pounds per square
inch gauge (psig). By increasing the purity of oxygen and adding a modest
chamber pressure the partial pressure of oxygen is increased by up to
nine-fold. The low pressure generated oxygen is efficiently contacted
with water using a venturi and spray chamber. With a short residence time
equilibrium saturations are not achieved, but the system is able to produce
dissolved oxygen concentrations of 30 mg/L to 50 mg/L at high flow rates