Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 723, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.138054
Keywords
Microbial fuel cell; Landfill leachate; Algae; Nutrient removal; Electricity
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Funding
- National Research Foundation of Korea [2015R1D1A1A09059935, 2018R1A2B6001507]
- National Research Foundation of Korea [2015R1D1A1A09059935] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 land fill 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. (C) 2020 Elsevier B.V. All rights reserved.
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