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Secondary sewage treatment is mainly a:

  1. A
    Physical process
  2. B
    Mechanical process
  3. C
    Chemical process
  4. D
    Biological process

Solution & Step-by-step Explanation

Secondary treatment of sewage is a biological process that uses aerobic and anaerobic microbes to decompose organic matter present in the effluent after primary (physical) treatment.

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Secondary sewage treatment is mainly a:
A
Physical process
B
Mechanical process
C
Chemical process
D
Biological process

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Microbes in Human WelfareSewage Treatment

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