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Biology · MICROBES IN HUMAN WELFARE

हिन्दी

In a typical biogas plant, what is the nature of the active microbial process occurring inside the concrete digester tank?

  1. Strictly aerobic respiration utilizing atmospheric oxygen
  2. Photosynthetic fixation of carbon dioxide by cyanobacteria
  3. Anaerobic digestion of organic wastes and slurry
  4. Chemoautotrophic oxidation of hydrogen sulfide

Correct answer · Option 3

Anaerobic digestion of organic wastes and slurry

Explanation

The biogas plant consists of a deep concrete tank where bio-wastes and dung slurry undergo anaerobic microbial digestion to produce biogas.

Related questions

Given below are two statements: Statement I: Alexander Fleming, Ernst Chain and Howard Florey were awarded the Nobel Prize in 1945 for the discovery and potential establishment of Penicillin as an effective antibiotic. Statement II: Streptokinase is used as a clot buster because of its immunosuppressive action in organ-transplant patients. In the light of the above statements, choose the most appropriate answer from the options given below:→Which bioactive molecule is commercially used as an immunosuppressive agent in organ-transplant patients?→Which microbial enzyme is used in detergent formulations and is helpful in removing oily stains from laundry?→Consider the following statements regarding secondary sewage treatment and sludge processing: (A) The effluent is passed into aeration tanks where growth of aerobic microbes forms flocs. (B) The BOD of sewage is significantly reduced during the aeration tank process. (C) A small part of the activated sludge is pumped back into the aeration tank to serve as inoculum. (D) Anaerobic sludge digesters produce gases such as methane, hydrogen sulphide and carbon dioxide. How many of the above statements are correct?→
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