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This study reviews the capability and mechanisms of MFC technology in treating landfill leachate, including carbon, nitrogen, and phosphorous removal, and discusses recent advances in standalone and hybrid MFCs.

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System
MFC

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Abstract

Over half of century, sanitary landfill was and is still the most economical treatment strategy for solid waste disposal, but the environmental risks associated with the leachate have brought attention of scientists for its proper treatment to avoid surface and ground water deterioration. Most of the treatment technologies are energy-negative and cost intensive processes, which are unable to meet current environmental regulations. There are continuous demands of alternatives concomitant with positive energy and high effluent quality. Microbial fuel cells (MFCs) were launched in the last two decades as a potential treatment technology with bioelectricity generation accompanied with simultaneous carbon and nutrient removal. This study reviews capability and mechanisms of carbon, nitrogen and phosphorous removal from landfill leachate through MFC technology, as well as summarizes and discusses the recent advances of standalone and hybrid MFCs performances in landfill leachate (LFL) treatment. Recent improvements and synergetic effect of hybrid MFC technology upon the increasing of power densities, organic and nutrient removal, and future challenges were discussed in details.

Key findings

  • MFCs can generate bioelectricity while removing carbon, nitrogen, and phosphorous from landfill leachate.
  • Hybrid MFC systems can improve power densities, organic removal, and nutrient removal compared to standalone MFCs.
  • Recent improvements in hybrid MFC technology have shown synergistic effects, but further research is needed to address future challenges.

Keywords

LeachateMicrobial fuel cellEffluentWaste managementMunicipal solid wasteNutrient

Identifiers

DOI
10.1016/j.jes.2020.05.005
PubMed
32819684
Journal
Journal of environmental sciences (China)
Year
2019