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Ramya Suresh,Baskar Rajoo,Maheswari Chenniappan,Manikandan Palanichamy 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.5
The present study focused on the various advanced oxidation processes; Ozone, UV radiation, O₃/H₂O₂, O₃/UV, UV/H₂O₂ and O₃/UV/H₂O₂ for treatability of dairy industry wastewater. With this aim, the trials were carried out in cylindrical reactor fortified with UV radiation and Ozone injection. Efficiency of the treatment process was evaluated considering Chemical Oxygen Demand (COD), lactose reduction and process parameters were determined to be reaction time, pH, circulation rate, and H₂O₂ dosage. 32.5%, 35.2% , 25%, 83% COD and 40.6%, 43.6%, 38.2%, 80% lactose reduction efficiency were obtained under the operating conditions for O₃/H₂O₂, O₃/UV, UV/H₂O₂ and O₃/UV/H₂O₂ processes, respectively. As per this outcome, UV/H₂O₂/O₃ process gave more than 65% of COD and 52.36% of lactose reduction efficiency than other hybrid processes. Optimum conditions for UV/H₂O₂/O₃ process (pH = 5, time = 180 mins, circulation rate = 50 mL/h and H₂O₂ dosage of 0.5 mL) resulted in 88% of COD and 93.4% lactose reduction.