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The study investigated the optimization of process parameters in an annular single chamber microbial fuel cell (ASCMFC) for efficient wastewater treatment and electricity generation. The results showed that temperature and pH significantly affected the performance of the ASCMFC, with optimal conditions at 35°C and pH 7. The study demonstrated the potential of ASCMFC in treating chocolate industry wastewater and generating electricity.

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Reported parameters

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Coulombic efficiency45.1%

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What they did

System
MFC

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Abstract

Energy harvest from optimized annular single chamber microbial fuel cell (ASCMFC) with novel configuration, which treats chocolate industry wastewater, was investigated. In this study, optimization of operational parameters of the ASCMFC in terms of efficiency water‐soluble organic matter reduction and capability of electricity generation was evaluated. During the experiment, effluent from the anode compartment was examined through current and power density curves for variation in temperature and pH, chemical oxygen demand (COD), and turbidity removal, and substrate concentration. The performance analyzed at different temperature ranges such as 25, 30, 35, and 40°C, which showed 88% increase by uprising temperature from 25 to 35°C. The ASCMFC was used to produce electricity by adjusting pH between 5 and 9 at resistance of 100 Ω. Under the condition of pH 7 power density (16.75 W/m 3 ) was highest, which means natural pH is preferred to maximize microbial activities. Wastewater concentration with COD of 700 and 1400 mg/L were investigated to determine its affection on current production. Reduction of current density was observed due to decrease in wastewater concentration. Significant reduction in COD and turbidity of effluent were 91 and 78%, respectively. The coulombic efficiency of 45.1% was achieved.

Key findings

  • 88% increase in performance by increasing temperature from 25 to 35°C
  • Highest power density of 16.75 W/m³ at pH 7
  • Reduction in current density with decrease in wastewater concentration

Keywords

Microbial fuel cellWastewaterChemical oxygen demandEffluentPulp and paper industryTurbidity

Identifiers

DOI
10.1002/elsc.201600173
Journal
Engineering in Life Sciences
Year
2016