gs1medium

Microbial fuel cells are considered a source of sustainable energy. Why?

  1. 1.They use living organisms as catalysts to generate electricity from certain substrates.
  2. 2.They use a variety of inorganic materials as substrates.
  3. 3.They can be installed in waste water treatment plants to cleanse water and produce electricity. Which of the Statements given above is/are correct?
  1. A.1 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
▶ Answer & Explanation

Correct answer: C. 1 and 3 only

Microbial fuel cells (MFCs) harness the metabolic processes of microorganisms to generate electricity. These microbes act as biocatalysts, oxidizing organic matter present in substrates and releasing electrons that can be captured as electrical current. A significant advantage is their application in wastewater treatment, where they simultaneously purify water by breaking down pollutants and produce energy, embodying a circular economy approach.

Source: UPSC gs1 2011

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