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A microbial fuel cell (MFC) was used to generate electricity from proteins and a protein-rich wastewater, achieving power densities of up to 354 mW/m².

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Representative MFC — matched on the paper’s system type only, not its reactor or geometry.

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What they did

System
MFC

What worked

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Abstract

Electricity generation was examined from proteins and a protein‐rich wastewater using a single chamber microbial fuel cell (MFC). The maximum power densities achieved were 354 ± 10 mW/m 2 using bovine serum albumin (BSA) and 269 ± 14 mW/m 2 using peptone (1100 mg/L BSA and 300 mg/L peptone). The recovery of organic matter as electricity, defined as the Coulombic efficiency (CE), was comparable to that obtained with other substrates with CE = 20.6% for BSA and CE = 6.0% for peptone. A meat packing wastewater (MPW), diluted to 1420 mg/L chemical oxygen demand, produced 80 ± 1 mW/m 2 , and power was increased by 33% by adding salt (300 mg/L sodium chloride) to increase solution conductivity. A wastewater inoculum generated 33% less power than the MPW inoculum. The MFC was an effective method of wastewater treatment, demonstrated by >86% of biochemical oxygen demand and total organic carbon removal from wastewater.

Key findings

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Keywords

Microbial fuel cellElectricityFuel cellsElectricity generationWaste managementBiochemical engineering

Identifiers

DOI
10.2175/106143005x73046
Journal
Water Environment Research
Year
2006