Removal of chemical oxygen demand (COD) from hospital wastewater by electro fenton process using graphite–graphite electrochemical system

Y. Ghjair, Abdulla; H. Abbar, Ali

doi:10.30772/qjes.v15i1.809

	Removal of chemical oxygen demand (COD) from hospital wastewater by electro fenton process using graphite–graphite electrochemical system
Al-Qadisiyah Journal for Engineering Sciences
Volume 15, Issue 1, March 2022, Pages 23-31 PDF (569.49 K)
DOI: 10.30772/qjes.v15i1.809
Authors
Abdulla Y. Ghjair^* ¹; Ali H. Abbar²
¹Department of Chemical Engineering , College of Engineering, University of Al-Qadisiyah , Al-Qadisiyah, Iraq.
²Chemical engineering department/ college of enginerring/Al-Qadisiyah university
Abstract
Removal of COD from hospital wastewater generated from Al- Diwaniyah hospital located in Iraq was achieved using graphite–graphite electro-Fenton (EF) system. The effect of various operational parameters on the COD removal efficiency was investigated based on response surface methodology (RSM). Optimal conditions were current density of 20mA/cm², FeSO₄ concentration of 0.697 mM and time of 48.687 min. At these conditions COD elimination efficiency of 97.964 % was achieved at a specific energy consumption of 10.78 kWh/kg. The results indicated that time had the least effect on the COD removal efficiency, while the impact of current density had the greatest effect, followed by the FeSO₄ concentration. The adequacy of the model equation was confirmed by its high R² value (99.62%). The present study shows that graphite–graphite EF system was an efficient tool for removing of COD from hospital wastewaters.
Keywords
COD removal Electro; Fenton Porous graphite Response surface methodology Hospital wastewater

Statistics Article View: 209 PDF Download: 206