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Development of Hybrid Systems by Integrating an Adsorption Process with Natural Zeolite and/or Palygorskite into the Electrocoagulation Treatment of Sanitary Landfill Leachate

Author

Listed:
  • Christiana Genethliou

    (Department of Chemical Engineering, University of Patras, 26504 Patras, Greece)

  • Irene-Eva Triantaphyllidou

    (Department of Chemical Engineering, University of Patras, 26504 Patras, Greece)

  • Dimitrios Chatzitheodorou

    (Department of Chemical Engineering, University of Patras, 26504 Patras, Greece)

  • Athanasia G. Tekerlekopoulou

    (Department of Sustainable Agriculture, University of Patras, 2 G. Seferi Str., 30100 Agrinio, Greece)

  • Dimitris V. Vayenas

    (Department of Chemical Engineering, University of Patras, 26504 Patras, Greece
    Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas (FORTH/ICE-HT), 26504 Patras, Greece)

Abstract

The effectiveness of a hybrid approach comprising electrocoagulation (EC) and adsorption (AD) (using natural zeolite and/or palygorskite) processes to treat raw sanitary landfill leachate (SLL) was investigated in terms of color, dissolved chemical oxygen demand (d-COD), nitrate nitrogen (NO 3 − -N) and ammonium nitrogen (NH 4 + -N) removal. Optimal EC conditions were found with a current density of 30 mA cm −2 , Fe electrode material and pH 8. Implementation of the AD process using zeolite (AD zeo ) as pre- or post-treatment for EC significantly increased the NH 4 + -N removal efficiency. The AD zeo -EC sequential treatment showed considerably higher color removal compared to the EC-AD zeo sequential treatment and was therefore determined to be the optimal sequential treatment. Integration of the AD process using palygorskite (AD pal ) into the first or middle stage of the AD zeo -EC treatment system enhanced the overall NO 3 − -N removal efficiency. The hybrid AD zeo -AD pal -EC treatment system exhibited the highest simultaneous removal efficiencies of color, d-COD, NO 3 − -N and NH 4 + -N, corresponding to 95.06 ± 0.19%, 48.89 ± 0.89%, 68.38 ± 0.93% and 78.25 ± 0.61%, respectively. The results of this study indicate that the AD zeo -AD pal -EC hybrid system is a promising and efficient approach for treating raw landfill leachate.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:10:p:8344-:d:1151956
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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. Sushmita De & Tumpa Hazra & Amit Dutta, 2019. "Treatment of landfill leachate by integrated sequence of air stripping, coagulation–flocculation and adsorption," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 21(2), pages 657-677, April.
    3. Elena Cristina Rada & Irina Aura Istrate & Marco Ragazzi & Gianni Andreottola & Vincenzo Torretta, 2013. "Analysis of Electro-Oxidation Suitability for Landfill Leachate Treatment through an Experimental Study," Sustainability, MDPI, vol. 5(9), pages 1-16, September.
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