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Biology · MICROBES IN HUMAN WELFARE

हिन्दी

During secondary treatment of sewage, flocs are formed by:

  1. A
    Aerobic bacteria and fungal filaments
  2. B
    Anaerobic bacteria and methanogens
  3. C
    Cyanobacteria and algae
  4. D
    Viruses and protozoa
View Answer & Solution

Correct answer · Option A

Aerobic bacteria and fungal filaments

Explanation

Flocs are masses of bacteria associated with fungal filaments to form mesh-like structures during the aerobic treatment of sewage.

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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