Submersible microbial fuel cell for electricity production from sewage sludge

Yifeng Zhang, Lola Gonzalez Olias, Prawit Kongjan, Irini Angelidaki

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A submersible microbial fuel cell (SMFC) was utilized to treat sewage sludge and simultaneously generate electricity. Stable power generation (145± 5 mW/m2, 470 Ω) was produced continuously from raw sewage sludge for 5.5 days. The maximum power density reached 190±5 mW/m2. The corresponding total chemical oxygen demand (TCOD) removal efficiency was 78.1±0.2% with initial TCOD of 49.7 g/L. The power generation of SMFC was depended on the sludge concentration, while dilution of the raw sludge resulted in higher power density. The maximum power density was saturated at sludge concentration of 17 g-TCOD/L, where 290 mW/m2 was achieved. When effluents from an anaerobic digester that was fed with raw sludge were used as substrate in the SMFC, a maximum power density of 318 mW/m2, and a final TCOD removal of 71.9±0.2% were achieved. These results have practical implications for development of an effective system to treat sewage sludge and simultaneously recover energy.
Original languageEnglish
JournalWater Science and Technology
Volume64
Issue number1
Pages (from-to)50-55
ISSN0273-1223
DOIs
Publication statusPublished - 2011

Keywords

  • Sewage sludge
  • TCOD removal efficiency
  • Submersible microbial fuel cell
  • Electricity generation
  • Anaerobic digestion

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