ENHANCING EFFLUENT QUALITY OF WASTEWATER TREATMENT PLANTS USING ENVIRONMENTALLY FRIENDLY OXIDATIVE MATERIALS

Abstract

The critical situation about water resources in Egypt forces the state to increase its uses from non-conventional water resources (reuse of wastewater and desalination). These resources represent 22.2% of the total available water resources. Wastewater reuse represent a potential source for around 8 BCM /year. The micropollutant sophisticated specification hinder the usage of wastewater. Advanced oxidation process (AOPs) represents new potential way for improving the effluent of wastewater treatment plants (WWTPs). In this work, the discharge of three WWTPs (Arab Abosaaed, El Berka and Balaqs) were investigated and treated. The investigation illustrated that El Berka WWTP is the most vulnerable WWTP this why its effluent was used to conduct further treatment on it. Wastewater quality index (WWQI) For the effluent (output) of the three WWTPs indicated that mostly the three are appropriate for use according to Egyptian law 48/1982 and the uses quality for treated wastewater are fitted with Class D and Class C Code 501/2015 specification. Effluent from the three-treatment plant is unsuitable for uses according to Class A and B. All the oxidants used has been successfully implemented to achieve 100% WWQI for different reuse purposes. The result demonstrated that hydrogen peroxide at a dose of 15 mg/l is very effective in the removal of different pollutants with removal percent of TSS, COD, BOD5, TOC, and Total Coliform was 84%, 83%, 94%, 89% and 97%, respectively. While when using ferrate achieved removal percent of TSS and T.C higher than other use oxidants in this study. Finally, in terms of cost and application, ferrate and hydrogen peroxide achieved the highest percent removal of pollutants.