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.
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