ON EVALUATION OF THE EFFICIENCY OF THE PROCESS OF ADVANCED OXIDATION

The EEO parameter is commonly used as a figure-of-merit of ultraviolet-based advanced oxidation processes (UV AOPs). It represents the energy input into the UV AOPs that can achieve an order of magnitude decrease in the target contaminant concentration in a unit volume. This paper focuses on factors, that influence on the EEO parameter and should be reported with it to compare the efficiency of different reactors or UV AOPs: the identity and concentration of the target pollutant, as well as the concentration of scavengers; the amount of hydrogen peroxide or other oxidizing agent, source of UV radiation etc. Decays of phenol, sodium dodecyl sulfate and petroleum products in UV AOP were used to show how various conditions affect on the EEO pa-rameter. The studies were carried out on model solutions with an initial concentration of pollutants of 10 mg/l. As a source of ultraviolet radiation, a pulsed xenon lamp was used. It has a continuous emission spectrum in the range of 200 -1000 nm, the average energy consumption was about 200 W, the radiation energy in the range of 200-300 nm was 2.7 J. Hydrogen peroxide was used as an oxidizing agent, it concentration varied from 10 to 340 mg/L. The modified parameter of UV AOP efficiency is proposed. It considers electrical energy input with reagents consumption. It is proposed to express the costs of the oxidant in physical values and include them in the modified parameter with a weighting factor.