MESSAI.iO

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This study optimized a single-chamber microbial fuel cell (MFC) using Pseudomonas aeruginosa to compare synthetic and real dairy wastewaters for power generation. Synthetic wastewater was optimized via one-variable-at-a-time approach, achieving 485 mV with 1.5% lactose, 0.3% ammonium chloride, 0.03% NaCl, 3% inoculum, 37°C, and pH 7. Real dairy wastewater (COD 801 mg/L) generated superior performance at 561 mV and 73.54 mW/m² power density, demonstrating simultaneous energy recovery and wastewater treatment potential.

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What they did

System
MFC

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Abstract

To investigate the performance of microbial fuel cell (MFC) with a single-chamber membrane, Pseudomonas aeruginosa is used as a bio catalyst for various synthetic wastewaters rich in carbohydrate and is compared with real dairy wastewater in this experiment. Therefore, the choice of appropriate carbon, nitrogen, NaCl, inoculum content, temperature, and pH process parameters are used for preparing synthetic wastewater was agreed upon by one-variable-at-a time approach. Maximum levels of voltage generation attained from the synthetic wastewater was 485 mV when supple­mented with 1.5 % of lactose as a source of carbon, 0.3 % of ammonium chloride as a decent nitrogen source, 0.03 % of NaCl, inoculum concentration of 3 %, the temperature at 37 °C and pH 7. On the other hand, the maximum voltage attained with real dairy wastewater was 561 mV with high chemical oxygen demand (COD) value of 801 mg l⁻¹. The maximum power density obtained from dairy wastewater was 73.54 mW m⁻². Thus, High voltage achieved for MFC operating with real dairy wastewater suggests that it can be used not only for the industrial application to generate more renewable power, but also for the wastewater treatment carried out at the same time.

Keywords

Microbial fuel cellWastewaterChemical oxygen demandPulp and paper industryAmmoniumLactose

Identifiers

DOI
10.5599/jese.1030
Journal
Journal of Electrochemical Science and Engineering
Year
2021