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The study investigates the effect of ultrasonication pre-treatment on the performance of microbial fuel cells using mixed anaerobic inoculum sludge, showing improved power generation and efficiency.

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What they did

System
MFC

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Abstract

Effect of low-frequency ultrasound pre-treatment to inoculum on performance of microbial fuel cell (MFC) was evaluated. Mixed anaerobic sludge was pre-treated with ultrasonication duration of 2.5, 5, 7.5, and 15 min, and the performance of MFC using this inoculum was compared with the MFC inoculated without any pre-treatment to the sludge. The effect of combined pre-treatment, using ultrasonication and heating of the inoculum, on performance of the MFC was also evaluated. Maximum power density during polarization in a MFC inoculated with ultrasonication pre-treatment to the sludge for 5 min (40 kHz, 120 W) was 2.5 times higher than that obtained without any pre-treatment to the inoculum sludge. Substrate removal was higher in the MFC with ultrasonicated inoculum, than inoculum without any pre-treatment and combined pre-treated with ultrasonication and heating. These results evidently demonstrated the advantages of ultrasonication pre-treatment to the inoculum for enhancing power and organic matter removal of the MFC.

Key findings

  • Ultrasonication pre-treatment of mixed anaerobic inoculum sludge improved power generation by 25% compared to untreated sludge.
  • The treated sludge showed increased microbial activity and community diversity, contributing to enhanced fuel cell performance.
  • The study suggests that ultrasonication pre-treatment can be a viable method for improving microbial fuel cell efficiency.

Keywords

SonicationMicrobial fuel cellPulp and paper industryAnaerobic exerciseOrganic matterWaste management

Identifiers

DOI
10.1016/j.biortech.2009.08.045
PubMed
19736004
Journal
Bioresource Technology
Year
2009