What is 'activated sludge' in sewage treatment ?

What is activated sludge in a sewage treatment tank? How this activated sludge is used?

What is sewage treatment?

Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.

Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.

Study the following statements and select the incorrect ones (i) Physical removeal of large and small particles through filtration and sedimentation is called primary sewage treamtent. (ii) Secondry sewage treatment is mainly a mechanical process (iii) Activated sludge sediment is a sewage treatement plant is a rich soruce of aerobic bactria.

What is the group of bacteria found in both the rumen of cattle and sludge of sewage treatment ?

What is group of bacteria found in both ;cattle and sludge of sewage treatment?