Ozone water treatment solutions - ozone generators and ozonators

Ozonation

Ozone is a strong oxidizer and can be particularly effective for water and waste water treatment with less than 1% organic content. It is sometimes used as a pretreatment method, or to disinfect wastewater after biological treatment. It oxidizes a wide range of organics, can destroy cyanide wastes and phenolic compounds, and is faster acting than alkaline chlorination. And, unlike chlorine, ozone doesn`t generate toxic ions in the oxidation process.

Ozone is the triatomic form of oxygen formed naturally during lightning strikes and anytime an electric arc is formed. It is a very unstable compound and must be produced at the same time it is needed, usually by ultraviolet excitation and corona discharge. It isn`t effective in treating slurries, sludges, solids, organic solvents, or tars.

Before use, consider the possibility that ozone will oxidize other stream components that didn`t need treatment. Excess ozone, (that is, ozone not consumed in the reaction) must be catalytically decomposed since release isn`t permitted.

Ozone Water Treatment Systems

Ozonation has recently gained popularity as a treatment alternative in the United States after regulatory agencies placed restrictions on the disinfection by-products, especially levels of tri-halomethane (THM).

Ozonation is an established and proven disinfection alternative as well as a peroxidant for the control of THM precursors. It also has the benefits of:

Oxidation and volatilization of organics
Control of algae and associated compounds
Destabilization (microflocculation) of certain types of turbidity
Removal of color-causing compounds
Oxidation of iron and manganese
Very short disinfection times
Partial oxidation of organics for subsequent removal by microorganisms.

Ozone Generator Selection
 
Ozone is generated by passing a high voltage alternating current (6-20 kV) across a dielectric discharge gap through which oxygen gas is injected. Setting aside the sales pitches from manufacturers, most practical generators are either low (50-60 Hz) or medium (200-1000 Hz) frequency. Medium frequency generators are generally considered better performers. It is often helpful to contact Pure Aqua in similar applications to finalize the selection of an ozone generator.