Journal of Chemical Engineering & Process Technology
Open Access

Abstract

Treatment of the Olive Mill Industry Wastewater with Ultrasound and Some Nano-Sized Metal Oxides

Delia Teresa Sponza and Rukiye Oztekin

The effects of nano-sized metal oxides namely titanium dioxide (TiO₂), nickel oxide (NiO) and zinc oxide (ZnO) on the ultrasound of olive mill effluent wastewater (OMW) in Turkey were investigated. 150 minutes ultrasound alone provided 61%, 50%, 61% and 66% dissolved chemical oxygen demand (COD_dis), color, total phenol and total aromatic amines (TAAs) removals, respectively, at 25°C. The maximum TAAs (90%), total phenol (97%), color (94%) and COD_dis (97%) removals were obtained with 5 mg/L nano-sized ZnO, 4 mg/L nano-sized TiO₂, 4 mg/L nano-sized TiO₂ and 4 mg/L nano-sized TiO₂, respectively, through out ultrasound.