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Mineralization of Wastewater from the Teaching Hospital of Treichville by a Combination of Biological Treatment and Advanced Oxidation Processes

Sadia Sahi Placide, Kambiré Ollo, Gnamba Corneil Quand-Même, Pohan Lemeyonouin Aliou Guillaume, Berté Mohamed,

Abstract: Biological treatment, due to its low installation cost, is widely used for wastewater treatment. However, this treatment remains ineffective for the oxidation of so-called emerging molecules. To solve this environmental problem, advanced oxidation processes (AOPs) combine with Biological treatment for rapid, efficient and cost-effective purification of wastewater. This combination used in this work, allowed a total mineralization of a real wastewater solution from the teaching hospital of Treichville named CHU of Treichville in Abidjan (CHUT), both in terms of organic and microbiological pollutants. Real wastewater from the CHUT underwent a Biological treatment for 28 days via the Zahn-Wellens methods which made it possible to have a reduction rate of the chemical oxygen demand of more than 90% of biologically active organic pollutants. The biologically treated wastewater was doped with ceftriaxone (CTX) to simulate a situation of wastewater containing a recalcitrant compound after Biological treatment. Subsequently, the doped solution underwent treatment with different AOPs (UV / H2O2, Fe2+ / H2O2 and UV / Fe2+ / H2O2). This combination resulted in a COD reduction rate of over to be higher 98% and total inactivation of microbiological germs.
Keywords: Biological treatment / wastewater / Fe2 / CHUT / doped / H2O2 / AOPs / Hospital

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