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Physical removal of large and small stable solid particles from the sewage through filtration and sedimentation is called

Option: 1

Primary treatment 

Option: 2

stable solid particles

Option: 3

Tertiary treatment

Option: 4

quaternary treatment

Answers (1)


Primary treatment steps basically involve the physical removal of particles – large and small – from the sewage through filtration and sedimentation. Hence, the correct option is (a). 

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