Ozone generator
Hi greggv,
Too lazy to re-explain this (sorry), I've copied one of my earlier explanations regarding organic contamination:
"The recirculating water in your WEDM is part of the dielectric system but it is also a mini-ecosystem in which bacteria can flourish. The presence of bacteria is revealed by a slippery, dark-colored slime that coats the sides of the reservoir and work tank. Just as this slimy bacteria coats everything exposed to the dielectric water, it also enters and coats the filters and resin beads and can render them both useless, even right after a filter or resin change.
Bacteria cannot be filtered out and will stubbornly continue to multiply, hiding inside every nook and cranny of convoluted hoses and solenoids. There are biocides available to counter bacteria, but these are all chemicals additives that can upset the chemistry and conductivity of the water. Instead, when faced with this problem, consider the use of an ozone generator, similar to the ones used in swimming pools and spas.
Ozone is a form of oxygen with three atoms linked together (O3) instead of two (O2), like the oxygen we breathe. Ozone is often called, “activated oxygen” or “trivalent oxygen”. This extra atom is a highly reactive oxidizer and therefore, short-lived.
Ozone is created naturally in the atmosphere in the presence of electricity (lightning) and ultraviolet rays (sunlight). Man-made ozone can be produced photo-chemically with ultraviolet light or electrical discharges (corona discharges). In a closed-loop dielectric system equipped with an ozone generator, O3 is injected into the DI water where it readily oxidizes organic matter by rupturing the walls of organic cells, destroying them as it gives up its extra atom in the process and harmlessly reverts back into pure oxygen."
This one is from Ebbco.
800-809-3901
There is a good graphic in EDM Today showing how it works. Let us know how you make out.
Bud Guitrau