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NEET Sample Paper NEET Sample Test Paper-23

  • question_answer
    Once BOD from the sewage is reduced significantly, the 'floes' are allowed to sediment and it is known as _____.

    A)  Primary Sludge

    B)  Secondary Sludge

    C)  Activated Sludge

    D)  Inactivated Sludge

    Correct Answer: C

    Solution :

    Once the BOD of sewage or waste water is reduced significantly, the effluent is then passed into a settling tank where the bacterial 'floes' are allowed to segment. This sediment is called activated sludge.


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