Advanced Oxidation Processes (AOP) uses strong oxidizing agents to break down persistent or refractory organic chemicals. These compounds are very resistant to biological treatment and removing them in a reasonable time frame is difficult using only biological means.
AOP utilizes strong reagents for industrial wastewater treatment or for special environmental concerns. The advanced oxidation process can be used to remove certain organic pollutants completely or to break down refractory compounds which will then be amenable to biological treatment. The choice of process will depend on the required treatment level, the expense and time allowed.
Even though the chemicals used are strong, the end products of the process are still just carbon dioxide and water. Waterworks employs various reagents including:
1. Fenton’s Reagent (FeSO4)
2. Hydrogen peroxide (H2O2) and ultraviolet irradiation (UV)
3. Ozone (O3) and ultraviolet irradiation (UV)
4. Ozone and hydrogen peroxide
Waterworks AOP processes have treated di-, tri-, and penta-chlorinated phenols, tannins and organic colors, soluble oils, greases and solvents, and BTEX compounds. These systems have operated at tanneries, at US EPA Superfund sites, in Canada on contaminated ground waters and in Asia on various industrial wastewaters.
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