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Performance Evaluation of the Electro-Fenton Process for Distillery Wastewater Treatment

Author

Listed:
  • Keerthana Rani Minnalkodi Senguttuvan

    (Centre for Environmental Engineering, Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai 600025, Tamil Nadu, India)

  • Kanmani Sellappa

    (Centre for Environmental Engineering, Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai 600025, Tamil Nadu, India)

  • Saranya Kuppusamy

    (Centre for Environmental Engineering, Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai 600025, Tamil Nadu, India)

Abstract

A fair amount of India’s gross domestic product is contributed by distilleries, which are considered the backbone industries of India. Distilleries indeed play key roles in India’s exports. Distillery wastewater is recognized as one of the recalcitrant wastewaters, containing extremely high organic loading and having an adverse impact when released into the environment. The aim of the present study was to optimize the conditions required for attaining improved COD removal efficiency in distillery wastewater through an electro-Fenton (EF) process. The effect of various operating parameters, viz. H 2 O 2 dosage (555–2220 mg L −1 ), spacing between the iron electrodes (2–6 cm), electrode dipping area (35–65 cm 2 ), initial pH (2–9), and constant voltage supply (5–15 V), were investigated by carrying out the EF process in batch mode. As a result of the EF study, COD removal efficiency of 79.5% for an initial COD of 5500–6000 mg L −1 was achieved for the distillery wastewater under the condition of 1665 mg L −1 H 2 O 2 , 2.5 cm of spacing between the electrodes, 55 cm 2 of electrode dipping area, pH 3, and constant voltage supply of 5 V. In the same study, the kinetics of the process was also investigated, and it obeyed the pseudo-first-order reaction. The EF process effectively degrades complex organic compounds in distillery wastewater into simpler, potentially less toxic substances, as demonstrated by gas chromatography–mass spectrometry (GC-MS) analysis and pathway elucidation. The central composite design (CCD) of the response surface methodology (RSM) model was used to optimize the COD removal in distillery wastewater through the EF process. In line with the batch experimental results, RSM projections also indicated that the optimum conditions required for attaining a maximum of 70.8% COD removal efficiency in distillery wastewater are found to be 1402 mg L −1 H 2 O 2 dosage, 3 cm electrode spacing, 60 cm 2 dipping area, 5 V voltage, and pH 2.18. The research data supported the conclusion that the EF process is feasible for distillery wastewater treatment, which preferably can be applied extensively.

Suggested Citation

  • Keerthana Rani Minnalkodi Senguttuvan & Kanmani Sellappa & Saranya Kuppusamy, 2024. "Performance Evaluation of the Electro-Fenton Process for Distillery Wastewater Treatment," Sustainability, MDPI, vol. 16(15), pages 1-23, July.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:15:p:6512-:d:1446129
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    References listed on IDEAS

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    1. Umesh Ghimire & Min Jang & Sokhee P. Jung & Daeryong Park & Se Jin Park & Hanchao Yu & Sang-Eun Oh, 2019. "Electrochemical Removal of Ammonium Nitrogen and COD of Domestic Wastewater using Platinum Coated Titanium as an Anode Electrode," Energies, MDPI, vol. 12(5), pages 1-13, March.
    2. Jiachao Yao & Yu Mei & Junhui Jiang & Guanghua Xia & Jun Chen, 2022. "Process Optimization of Electrochemical Treatment of COD and Total Nitrogen Containing Wastewater," IJERPH, MDPI, vol. 19(2), pages 1-12, January.
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