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Electrochemical Removal of Ammonium Nitrogen and COD of Domestic Wastewater using Platinum Coated Titanium as an Anode Electrode

Author

Listed:
  • Umesh Ghimire

    (Department of Biological Environment, Kangwon National University, 192-1 Hyoja-2-dong, Gangwondo, Chuncheon 200-701, Korea)

  • Min Jang

    (Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul 01897, Korea)

  • Sokhee P. Jung

    (Department of Environment and Energy Engineering, Chonnam National University, Gwangju 61186, Korea)

  • Daeryong Park

    (Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

  • Se Jin Park

    (Department of Biological Environment, Kangwon National University, 192-1 Hyoja-2-dong, Gangwondo, Chuncheon 200-701, Korea)

  • Hanchao Yu

    (Department of Environmental Engineering, Korea Maritime and Ocean University, Busan 49112, Korea)

  • Sang-Eun Oh

    (Department of Biological Environment, Kangwon National University, 192-1 Hyoja-2-dong, Gangwondo, Chuncheon 200-701, Korea)

Abstract

Biological treatment systems face many challenges in winter to reduce the level of nitrogen due to low temperatures. The present work aimed to study an electrochemical treatment to investigate the effect of applying an electric voltage to wastewater to reduce the ammonium nitrogen and COD (chemical oxygen demand) in domestic wastewater. This was done by using an electrochemical process in which a platinum-coated titanium material was used as an anode and stainless steel was used as a cathode (25 cm 2 electrode area/500 mL). Our results indicated that the removal of ammonium nitrogen (NH 4 + –N) and the lowering of COD was directly proportional to the amount of electric voltage applied between the electrodes. Our seven hour experiment showed that 97.6% of NH 4 + –N was removed at an electric voltage of 5 V, whereas only 68% was removed with 3 V, 20% with 1.2 V, and 10% with 0.6 V. Similarly, at 5 V, the removal of COD was around 97.5%. Over the seven hours of the experiment, the pH of wastewater increased from pH 7.12 to pH 8.15 when 5 V was applied to the wastewater. Therefore, electric voltage is effective in the oxidation of ammonium nitrogen and the reduction in COD in wastewater.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:5:p:883-:d:211769
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    Citations

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    Cited by:

    1. Sameh Jallouli & Khawla Chouchene & Mohamed Ben Hmida & Mohamed Ksibi, 2022. "Application of Sequential Combination of Electro-Coagulation/Electro-Oxidation and Adsorption for the Treatment of Hemodialysis Wastewater for Possible Reuse," Sustainability, MDPI, vol. 14(15), pages 1-14, August.
    2. Christiana Genethliou & Irene-Eva Triantaphyllidou & Dimitrios Chatzitheodorou & Athanasia G. Tekerlekopoulou & Dimitris V. Vayenas, 2023. "Development of Hybrid Systems by Integrating an Adsorption Process with Natural Zeolite and/or Palygorskite into the Electrocoagulation Treatment of Sanitary Landfill Leachate," Sustainability, MDPI, vol. 15(10), pages 1-19, May.
    3. Huy N. Q. Phan & Jyh Hoang Leu & Vi N. D. Nguyen, 2023. "The Combination of Anaerobic Digestion and Electro-Oxidation for Efficient COD Removal in Beverage Wastewater: Investigation of Electrolytic Cells," Sustainability, MDPI, vol. 15(6), pages 1-17, March.

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