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प्रश्न
In which of the following microbial digestion of organic wastes of sewage takes place?
पर्याय
Primary treatment
Secondary treatment
Tertiary treatment
Quaternary treatment
MCQ
उत्तर
Secondary treatment
Explanation:
The initial effluent is stirred continuously in the aeration tank throughout secondary treatment. This causes the proliferation of aerobic microorganisms, which causes the organic materials in the effluent to be digested.
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