Oxidative Treatment of a Wastewater Stream from a Molasses Processing Using Ozone and Advanced Oxidation Technologies

Abstract

The discoloration of a biologically pretreated wastewater stream from a molasses processing by ozonation and two advanced oxidation processes (O₃/H₂O₂ and O₃/γ-irradiation, respectively) was studied. Color removal occurred with all three processes with almost the same efficiency. The main difference between the methods applied was reflected by the BOD increase during the discoloration period. By ozonation it was much higher than by AOPs, but it also appeared with AOPs. AOPs therefore, were not appropriate as an effective BOD control during discoloration.

Key Words:

• Ozone
• Ozone/γ-irradiation
• Ozone/Hydrogen Peroxide
• Advanced Oxidation
• Molasses
• Wastewater Treatment
• Discoloration
• Chemical Oxygen Demand (COD)
• Biochemical Oxygen Demand (BOD)