The major portion of waste water in cities and towns is ______.
[A] Household waste
[B] Industrial waste
[C] Human excreta
[D] Both (a) and (b)
Municipal waste water is also known as ______.
Sewage is treated in ______.
STP stands for:
[A] Sequential Topographical Projection
[B] Standard Test Procedure
[C] Sewage Treatment Plant
[D] None of the above
Which microbes help in sewage treatment?
Sewage water treatment is done in how many stages?
Primary treatment of sewage waste involves which processes?
[A] Filtration and incubation
[B] Sedimentation and decantation
[C] Filtration and sedimentation
[D] Sedimentation and microbial proliferation
In sewage treatment plant, primary treatment involving removal of floating debris is done by:
[A] Vacuum filtration
[B] Pressure filtration
[C] Sequential filtration
In primary treatment of sewage water, removal of grit involves which process?
In primary treatment of sewage water, after sedimentation, the solids that settle form ______.
[A] activated sludge
[B] primary sludge
[C] secondary sludge
[D] Both (a) and (c)
The supernatant left after sedimentation of sewage water during primary treatment is known as:
Which of the following is transferred from primary setting tank to another tank for secondary treatment?
The secondary treatment of sewage waste is also known as ______.
[A] Chemical treatment
[B] Physical treatment
[C] Biological treatment
Which of the following is used in secondary treatment of sewage water?
[A] Fermentation tanks
[B] Digester tanks
[C] Detoxification tanks
[D] Aeration tanks
What kind of microbes is present in ‘flocs’ formed during secondary treatment of sewage?
[D] Aero tolerant