NEET Biology question

[NEET] Which of the following is the correct sequence of steps in sewage treatment?

(A)Primary treatment → Secondary (biological) treatment → Anaerobic sludge digestionCorrect
(B)Secondary treatment → Primary treatment → Anaerobic sludge digestion
(C)Anaerobic sludge digestion → Primary treatment → Secondary treatment
(D)Primary treatment → Anaerobic sludge digestion → Secondary treatment

Answer: (A)

Solution

The standard STP sequence begins with primary (physical) treatment to remove solids, followed by secondary (biological)

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Question ID VK-124793