A pilot study based on advanced oxidation processes for reducing organic pollutants and secondary municipal wastewater treatment and reuse
Subject Areas : Environment and HealthMahdieh Mostafavi 1 , Jalaledin Shayegan 2 , Amir Hossein Javid 3
1 - Department of Environmental Engineering Science and Research branch, Islamic Azad University, Tehran, Iran
2 - Department of Chemical Engineering, Sharif University of Technology, Tehran, Iran
3 - Department of Environmental Engineering Science and Research branch, Islamic Azad University, Tehran, Iran
Keywords: Advanced oxidation process (AOP), Municipal wastewater reuse, Ozone, Ultraviolet (UV), Reverse osmosis pretreatment,
Abstract :
Nowadays, the water industry has particular importance, for both drinking and industrial water usages. In most parts of the world, water resources are increasingly decreasing due to development and increasing demand. So, wastewater treatment and reuse is a priority. Therefore, currently, treatment technology needs new and innovative processes, according to the quality of raw water and wastewater. The recovered water should have the parameters of purity, sanitary desirability, environmental acceptance and economic feasibility based on industrial water standards for reuse. Therefore, in the current research, a pilot plant equipped with advanced oxidation processes was designed to purify and recover secondary municipal wastewater and remove residual pollutants in the effluent from the secondary urban wastewater treatment plant. During the test period, which was considered with a combination of processes including O3/H2O2, O3/UV, UV/H2O2, O3/UV/H2O2, the efficiency of removing organic pollutants was about 90%. In addition, disinfection, odor and color removal was also provided with very high efficiency. However, since the removal of turbidity and suspended matter was the inhibitory factor for some systems such as UV, by using sand filter, carbon filter and microfiltration, the removal efficiency of contaminants increased up to 98%. The obtained results indicate that the use of technologies based on advanced oxidation for wastewater reuse applications is one of the optimal options, even for wastewater with very high organic matter and it can be a suitable option as an optimal pretreatment method for reverse osmosis method.
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