Sustainable electricity generation and ammonium removal by microbial fuel cell with a microalgae assisted cathode at various environmental conditions

Ramesh Kakarla, Booki Min

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Power generation and nutrient removal by a microbial fuel cell assisted with an algae growth in cathode chamber were evaluated along with continuous measurements of dissolved oxygen (DO) at various light and temperature conditions. Under light/dark regime of 18/6 hrs, a sustainable voltage of 0.31 V was observed with sufficient DO in the dark period. However, maximum NH4+-N removal rate (22.7 mg/L.d) and removal percentage (95.5%) was observed with 12/12 light/dark regime. Voltage and nitrogen removal increased with higher photon flux density up to 92 µE m−2 s−1, and the highest 0.35 V voltage and NH4+-N removal rate of 26.5 mg/L.d were obtained. A higher temperature condition was favorable to improve the performance of algae cathode MFCs, but no substantial influence was observed relatively (19–35 °C). This study suggests that algae-cathode MFCs could continuously generate sustainable power with nutrient removal at optimum light and temperature conditions.

Original languageEnglish
Pages (from-to)161-167
Number of pages7
JournalBioresource Technology
Volume284
DOIs
Publication statusPublished - Jul 2019

Keywords

  • Algae growth
  • Electricity generation
  • Light/dark regimes
  • Microbial fuel cell
  • NH-N removal
  • Photon flux density
  • Temperature

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