Leachate treatment and electricity generation using an algae-cathode microbial fuel cell with continuous flow through the chambers in series

Hai T.H. Nguyen, Booki Min

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Algae-cathode microbial fuel cells (MFCs) with various hydraulic retention times (HRTs) were investigated for electricity generation, and chemical oxygen demand (COD) and nutrient removal from diluted landfill leachate (15% v/v). The cell voltage and dissolved oxygen (DO) in the cathode were considerably affected by the HRT. The highest cell voltage was 303 mV at 20-h HRT, and DO concentration of 5.3 mg/L was only observed at 60-h HRT. Nutrient removal increased with increasing HRTs, and the maximum removal efficiency was 76.4% and 86.3% at 60-h HRT for ammonium and phosphorus, respectively. The highest COD removal of 26% was observed at 60-h HRT. The dominant phyla in the cathode were Proteobacteria, Cyanobacteria, Bacteroidetes, and Chlorophyta, which could have contributed to electricity generation and nutrient removal. This study suggests that an algae-cathode MFC with an appropriate HRT can continuously generate electricity and simultaneously remove nutrients from real leachate wastewater in field applications.

Original languageEnglish
Article number138054
JournalScience of the Total Environment
Volume723
DOIs
Publication statusPublished - 25 Jun 2020

Keywords

  • Algae
  • Electricity
  • Landfill leachate
  • Microbial fuel cell
  • Nutrient removal

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