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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)

best_answer

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). 
 

Posted by

himanshu.meshram

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