First slide

Microbes in Sewage Treatment

Question

Which of the following in sewage treatment removes suspended solids?

Easy

A

Tertiary treatment
B

Secondary treatment
C

Primary treatment
D

Sludge treatment

Solution

In primary treatment the grit (soil and small pebbles) are removed by sedimentation. All solids that settle form the primary sludge, and the supernatant forms the effluent.

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