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(C) Primary treatment of sewage involves the physical removal of particles from the sewage through filtration and sedimentation. $1$. Filtration: Floa

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Physical particles

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(C) Primary treatment of sewage involves the physical removal of particles from the sewage through filtration and sedimentation. $1$. Filtration: Floating debris is removed by sequential filtration. $2$. Sedimentation: Grit (soil and small pebbles) is removed by sedimentation. All solids that settle form the primary sludge,and the supernatant forms the effluent. Therefore,primary treatment is essentially a physical process that removes physical particles.

What is removed during primary treatment of sewage?

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