Flocks are made up of.....

Where are methanogens found in a sewage treatment plant?

Select the appropriate option regarding the anaerobic sludge digester.

Removal of suspended,floating,coarse and solid particles in sewage treatment is called . . . . . . .

Which processes are used to remove physical particulate matter from sewage water?
$(i)$ Filtration
$(ii)$ Chlorination
$(iii)$ Sedimentation
$(iv)$ Biological treatment

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.