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Activated Sludge Process(Engineering > Waste Water Engineering ) Questions and Answers
Home
Topic
Engineering
Waste Water Engineering
Activated Sludge Process
Question 1.
________ is treated in activated sludge reactor.
Pre-treated sludge
Treated sludge
Macronutrients
Micro-organisms
Explanation:-
Answer: Option A. ->
Pre-treated sludge
Answer:
(a).
Pre-treated sludge
Question 2.
Why is the sludge aerated?
To avoid bacterial growth
To increase bacterial growth
To maintain pH
To maintain temperature
Explanation:-
Answer: Option B. ->
To increase bacterial growth
Answer:
(b).
To increase bacterial growth
Question 3.
After the treatment, the BOD demand ______
Remains constant
Decreases
Increases
Alters
Explanation:-
Answer: Option B. ->
Decreases
Answer:
(b).
Decreases
Question 4.
Which is the next reactor after activated sludge reactor in the treatment process?
Flocculation unit
Aeration unit
Clarifier
Disinfection unit
Explanation:-
Answer: Option C. ->
Clarifier
Answer:
(c).
Clarifier
Question 5.
Which type of pump is preferred to remove trickling filter humus?
Submersible cutter pump
Non-clog pump
Vertical turbine pumps
Diaphragm pump
Explanation:-
Answer: Option D. ->
Diaphragm pump
Answer:
(d).
Diaphragm pump
Question 6.
Which of these is not an alternative to activated sludge treatment systems?
Stabilization ponds
Rotating biological reactors
Trickling filter
Screening units
Explanation:-
Answer: Option D. ->
Screening units
Answer:
(d).
Screening units
Question 7.
Where is the sludge at the bottom of the clarifier processed to?
Settling unit
Aerator
Flocculation unit
Disinfection unit
Explanation:-
Answer: Option B. ->
Aerator
Answer:
(b).
Aerator
Question 8.
Which are the three ingredients in activated sludge systems?
Cells, sewage and oxygen
Cells, sewage and nitrogen
Solids, sewage and oxygen
Solids, water and oxygen
Explanation:-
Answer: Option A. ->
Cells, sewage and oxygen
Answer:
(a).
Cells, sewage and oxygen
Question 9.
How is air pumped in the aerator unit?
Bubbled from bottom
Sides
Bubbled from top
Sprayed
Explanation:-
Answer: Option A. ->
Bubbled from bottom
Answer:
(a).
Bubbled from bottom
Question 10.
An activated sludge system consists of two components, an aerator and ________
Screening units
Disinfection unit
Flocculation unit
Clarifier
Explanation:-
Answer: Option D. ->
Clarifier
Answer:
(d).
Clarifier
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