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A microbial fuel cell (MFC) was used to study the bioelectric production potential of actinomycete and microbial isolates in industrial glass factory wastewater, achieving a maximum voltage of 1.08 V and 81.2% chemical oxygen demand removal.

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What they did

System
MFC
Substrate
real wastewater
Inoculum
Actinomycete, Citrobacter freundii

What worked

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Abstract

A microbial fuel cell (MFC), a novel technology, is a biochemical catalyzer system that can convert the chemical energy of materials to bioelectric energy. This system can serve as a unique device for the treatment of wastewater. Based on this knowledge, we decided to study the bioenergy production ability of Actinomycete and microbial isolates in industrial glass factory wastewater as the decomposers of organic materials in this wastewater and the generation of Voltage and current in two batches and fed-batch conditions. At the most favorable condition maximum of 1.08 V (current 3.66 mA and power density 2.88 mW/m²), 81.2% chemical oxygen demand was obtained for a fed-batch system. Also, the outcomes of MFC’s essential parameters, for example, pH and TDS, were studied before and after the performance of MFC. The results showed a significant decrease after the operation of the MFC. To realize which Actinomycete were the most powerful bioelectric microorganism, the growth curve and electricity performance of three kinds of Actinomycete was selected. Results showed that the C2 would be more potent because its Voltage of 0.224 V and current of 1.187 mA possessed by it would result in an excellent power density of 141.42 mW/m².

Key findings

  • Maximum voltage of 1.08 V was achieved in a fed-batch system.
  • 81.2% chemical oxygen demand removal was obtained in a fed-batch system.
  • Significant decrease in pH and TDS was observed after MFC operation.

Keywords

Microbial fuel cellWastewaterPulp and paper industryChemical oxygen demandMicroorganismBioenergy

Identifiers

DOI
10.14393/bj-v39n0a2023-68225
Journal
Bioscience Journal
Year
2023