Sewage waste is....

What is removed by sedimentation in the sewage treatment process?

Select the correct statement from the following.

Which bacteria are used to treat sewage water?

In how many stages is the process of sewage treatment plants carried out?

Given below are two statements with reference to the secondary treatment of sewage.
Statement $I$: The $BOD$ of effluent increases.
Statement $II$: Flocs of bacteria consume the major part of the organic matter present in the effluent.
In the light of the above statements,choose the most appropriate answer from the options given below.