DynamOx is a proprietary system for efficiently delivering extremely large amounts of oxygen into waste streams without loss through bubbles; dissolving up to 880 mg/l of oxygen. The oxygen rich water remains stable, odor-free, and biologically available with virtually NO off gassing. This allows superior odor control as anaerobic wastewater can instantly shift to an aerobic state without "stripping" noxious gases from the waste stream. All of the oxygen is available for rapid BOD, ammonia, and phosphorous reduction. Standard systems are available in several sizes, delivering up to 60 #/hr of oxygen with electrical consumption of less than 0.25 kw-hr per pound of oxygen delivered. Systems are compact, easy to install and operate, and offer field proven reliability.
When organic materials are consumed by bacteria, an electron is released. The metabolic process that consumes BOD generates electrons so compounds that serve as electron acceptors are required. In an aerobic liquid, that electron would prefer to attach to an oxygen molecule. If no oxygen is available, it attaches to other compounds. Without discussing the "maximizing the yield of free energy" it suffices to say that Hydrogen Sulfide is formed. The addition of oxygen shifts the ORP (oxygen reduction potential) and changes the form of the sulfur and Hydrogen Sulfide gas is eliminated. The entire oxygen demand does not need to be satisfied; it is only important that electron acceptors become available.
The figure below depicts how ORP affects the form of sulfur in a liquid. The process of increasing the ORP to eliminate H2S has been well known for years but typical aeration equipment used bubbles to introduce the oxygen. This has lead to other problems.
The aeration process encourages the H2S to "off-gas" and increases the H2S concentrations in the air. DynamOx efficiently introduces oxygen (and only oxygen) into the offending liquid without driving off the hydrogen sulfide through the formation of bubbles.
DynamOx delivers more oxygen per kilowatt hour than any other known aeration device. It does so with no loss. It is capable of delivering oxygen is such high quantities and concentrations that it changes how an engineer approaches a design.
Stated simply, oxygen is no longer the limiting factor when operating an anaerobic wastewater design.
This bold statement is consistent with the many excellent design manuals but, at the same time contradicts some of well accepted assumptions.
For example, Sanitaire produces an excellent document entitled Diffused Aeration Design Guide. In it, it states, “Equipment manufactures cannot guarantee the oxygen transfer capability of aeration equipment in wastewater." However, DynamOx's unique design allows us to guarantee that 100% of the oxygen entering the DynamOx unit is delivered into the wastewater. The document details the factors that allow a designer to reduce the expected effectiveness of oxygen transfer in a given piece of aeration equipment due to the physical aspects of wastewater. The reader can refer to the Sanitaire document for the traditional definition of these factors.
There are two major factors that make the use of these "corrections factors" less relevant.
First and foremost, the saturation value of oxygen in the DynamOx vessel exceeds 800 mg/l. This is significant because the rate at which oxygen dissolves decreases asymptotically as it approaches saturation. Thus is a typical aeration deck the rate of transfer slows as the dissolved oxygen approaches 5-6 mg/l. In the DynamOx, however, the oxygen readily transfers into the liquid well past a concentration of 800 mg/l.
Secondly, the gaseous oxygen can only leave the system in the dissolved form; there is no off-gassing. Thus 100% of the oxygen purchased or generated is delivered - regardless of contaminants.
Thus, in a standard aeration application, an air bubble (20% oxygen) is in contact for a period of time measured is seconds with a very small driving force. The result, a great deal of energy is required to dealer sufficient oxygen. Why? Because bubbles are an inefficient way of transferring oxygen AND they are inefficient way of mixing wastewater.
