| Technique | Benefits | Drawbacks |
| Ozonation (O3/H2O2, O3/Fe2+, O3/Fe2+/UV) | Field-proven | Production of oxidation by-products, air permit needed for ozone emissions, off-gas treatment system for ozone destruction. Elevated working prices because of low water solubility. |
| Photolysis (O3/UV, H2O2/UV) | Field-proven, UV’s disinfection impact | Interference from turbidity. UV’s elevated price. UV’s restricted domain. |
| Heterogeneous photocatalysis (TiO2/UV) | Runs in a larger span of UV than photolysis like UVA (300 - 380 nm) | If TiO2 is employed as a slurry, a separation stage is needed. Supported TiO2 technique depicts promises in this direction; however, it has to be scaled-up. |
| Traditional Fenton reaction (H2O2/Fe2+) | Efficiency not touched via water quality. Greatly low-priced because of the H2O2 elevated solubility. | No full-scale usage. Optimal pH ~ 3.0*. Forms elevated quantities of Fe [39] sludge. |
| Electro-Fenton | The most effective of all AOPs. It may be automated. No chemical products but for the catalytic quantity of Fe (<0.1 mM), electrochemically produced at the cathode of the device. Little sludge generation. | No full-scale utilization. Needs acidic pH ~ 3.0. and persistent supply of O2. |