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Microbes in Human Welfare question

2012 · Q54
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Microbes in Human Welfare question

2012 · Q54

NEETBiologyMicrobes in Human WelfareMCQ+4 / −1
The domestic sewage in large cities :
  1. A
    has very high amounts of suspended solids and dissolved salts
  2. B
    has a high BOD as it contains both aerobic and anaerobic bacteria.
  3. C
    is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
  4. D
    When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
View written solutionFree

Correct answer: C

Sewage treatment is the process of removing contaminants from wastewater and household sewage, both runoff (effluents) and domestic. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants. Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment. It is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs).

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