Document Type : Original Article

Authors

• Mohammad Mehdi Mehrabani Ardekani ¹
• Sahand Jorfi ²
• Hamideh Akbari ³
• Jasem Savari ²
• Pegah Mohammadpour ²

¹ Fars Industrial Estate Corporation, HSE Office, Fars, Iran

² Department of Environmental Health Engineering, School of Public Health and Environmental Technology Research Center, Ahvaz Jondishapour University of Medical Sciences, Ahvaz, Iran

³ Department of Environmental Health, School of Public Health and Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran

Abstract

Aims: The main purpose of this study was to determine the efficiency of a sequencing treatment including ultraviolet (UV)/H ₂ O ₂ oxidation followed by a moving bed bioreactor (MBBR). Materials and Methods: Effect of solution pH, reaction time, and H ₂ O ₂ concentration were investigated for an industrial wastewater sample. The effluent of the advanced oxidation processes unit was introduced to the MBBR operated for three hydraulic retention times of 4, 8, and 12 h. Results: The optimum condition for industrial wastewater treatment via advanced oxidation was solution pH: 7, H ₂ O ₂ dose: 1000 mg/L and 90 min reaction time. These conditions led to 74.68% chemical oxygen demand (COD) removal and 66.15% biochemical oxygen demand (BOD ₅ ) removal from presedimentation step effluent that initially had COD and BOD ₅ contents of 4,400 and 1,950 mg/L, respectively. Conclusion: Combination of UV/H ₂ O ₂ advanced oxidation with MBBR could result in effluents that meet water quality standards for discharge to receiving waters.

Keywords

• Industrial wastewater treatment
• moving bed bioreactor
• refractory compounds
• ultraviolet/H2O2 oxidation