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Discussion :: UPSC Civil Service Exam Questions

  1. The waste stabilization ponds can be

    2. A.
    aerobic
    B.
    anaerobic
    C.
    facultative
    D.
    any of the above

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    Answer : Option D

    Explanation :

    Waste or Wastewater Stabilization Ponds (WSPs) are large, man-made water bodies in which blackwater, greywater or faecal sludge are treated by natural occurring processes and the influence of solar light, wind, microorganisms and algae . The ponds can be used individually, or linked in a series for improved treatment. There are three types of ponds, (1) anaerobic, (2) facultative and (3) aerobic (maturation), each with different treatment and design characteristics.
    Source: https://www.sswm.info/node/8199

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