Primary treatment is the

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(A) Primary treatment is the physical removal of large and small particles from sewage through filtration and sedimentation. These processes involve t

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Physical removal of large and small particles from sewage

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(A) Primary treatment is the physical removal of large and small particles from sewage through filtration and sedimentation. These processes involve the removal of floating debris by sequential filtration and the removal of grit (soil and small pebbles) by sedimentation. All solids that settle form the primary sludge,and the supernatant forms the effluent.

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