In the first stage of sewage treatment,physical particle matter is removed by which process?

  • A
    Filtration
  • B
    Sedimentation
  • C
    Decomposition
  • D
    Both $(A)$ and $(B)$

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Secondary sewage treatment is primarily a ......

$X$ - There are two phases in sewage treatment plant.
$Y$ - Microbes are involved in this process.

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