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Researchers developed a microbial fuel cell (MFC) to produce renewable electricity in a rice field, selecting a prototype with two holes at the anode and cathode that generated the highest voltage.

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What they did

System
MFC

What worked

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Abstract

Nugraha HW, Djajakirana G, Anwar S, Santosa DA. 2020. Producing renewable electric energy through a microbial fuel cell in the rice field. Biodiversitas 21: 4139-4146. Microbial Fuel Cell (MFC) is an alternative technology that converts chemical energy into electrical energy using microbes. This study aimed to apply MFC technology in the rice field to produce renewable electricity by utilizing microbes that have been previously isolated. The study was conducted in two experiments. The first experiment was carried out to select MFC prototypes with different in the oxygen circulation system (anode and cathode holes) that capable of producing the highest Voltage. The second experiment was performed to test the selected MFC prototype for electricity production in 12 combination treatments of microbes, organic matter, and fertilization (mixed NPK fertilizer) with three replications on rice cultivation in a greenhouse. The results showed that the best MFC prototype was a prototype that has two holes, each at anode and cathode (MFC 2). The highest electrical Voltage was generated by the treatment with microbes and organic matter, without fertilizer. The treatments produced the highest electrical current was the addition of microbes, organic matter, without and with 50% fertilizer. The highest power density was generated by the treatment with microbes and organic matter, without fertilization. The addition of ex-situ isolated microbes significantly increased the production of electricity.

Key findings

  • The best MFC prototype was a two-hole prototype (MFC 2) that generated the highest voltage.
  • The highest electrical voltage was generated by a treatment with microbes and organic matter, without fertilizer.
  • The MFC technology was successfully applied in a rice field to produce renewable electricity.

Keywords

Microbial fuel cellRenewable energyOrganic matterAnodePulp and paper industryFertilizer

Identifiers

DOI
10.13057/biodiv/d210927
Journal
Biodiversitas Journal of Biological Diversity
Year
2020