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Decolorization of Melanoidin Using Sono–Fenton and Photo–Fenton Processes

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  • Apichon Watcharenwong

    (School of Environmental Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
    Center of Excellence in Advanced Electromagnetic Waves Engineering for the Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand)

  • Kawintra Kongka

    (School of Environmental Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand)

  • Anusara Kaeokan

    (School of Environmental Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand)

  • Chanat Chokejaroenrat

    (Department of Environmental Technology and Management, Faculty of Environment, Kasetsart University, Bangkok 10900, Thailand)

  • Chainarong Sakulthaew

    (Department of Veterinary Technology, Faculty of Veterinary Technology, Kasetsart University, Bangkok 10900, Thailand)

Abstract

Ethanol production wastewater contains high quantities of dark–brown pigments (melanoidin) that result in low color removal using conventional biological treatments. Advanced oxidation processes (AOPs) are the most documented methods for reducing the color associated with melanoidin. This study examines the degradation of melanoidin using AOPs based on photo–Fenton, sono–Fenton, and sono–photo–Fenton processes. Their effects on decolorization were investigated based on light intensity, ultrasonic frequency, and the iron concentration (Fe 2+ )–to–H 2 O 2 ratio. This study showed that ultrasonic waves and UV light result in a higher melanoidin decolorization efficiency than Fenton reactions alone. The initial color values were reduced from 5000–5500 ADMI to below 500 ADMI for both processes because the ultrasonic waves and ultraviolet light induced H 2 O 2 breakdown into the OH radical. Reducing the color of the melanoidin using the photo–Fenton process resulted in a decolorization rate of 0.1126 min −1 , which was higher than the rates of both the sono–Fenton and sono–photo–Fenton processes. These results provide proof that the photo–assisted Fenton process is more applicable to treating dye–contaminated water than are other enhancing approaches.

Suggested Citation

  • Apichon Watcharenwong & Kawintra Kongka & Anusara Kaeokan & Chanat Chokejaroenrat & Chainarong Sakulthaew, 2023. "Decolorization of Melanoidin Using Sono–Fenton and Photo–Fenton Processes," Waste, MDPI, vol. 1(2), pages 1-13, May.
    • Handle: RePEc:gam:jwaste:v:1:y:2023:i:2:p:27-467:d:1139545
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    References listed on IDEAS

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    1. Cássia Sidney Santana & Márcio Daniel Nicodemos Ramos & Camila Cristina Vieira Velloso & André Aguiar, 2019. "Kinetic Evaluation of Dye Decolorization by Fenton Processes in the Presence of 3-Hydroxyanthranilic Acid," IJERPH, MDPI, vol. 16(9), pages 1-16, May.
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