NPTEL Wastewater Treatment and Recycling Week 10 Assignment Answers 2024
1. In a conventional STP based on aerobic technology, aeration tank is placed:
a. Right after secondary clarifier
b. Right before sand filter
c. Between primary sedimentation and secondary clarifier
d. Between grit chamber and primary clarifier
Answer :- For Answers Click Here
2. Which of the followings is a major challenge in adopting constructed wetlands for sewage treatment?
a. Large land area requirement
b. Complicated construction
c. Intricated operation and maintenance
d. Expensive to build and operate
Answer :- For Answers Click Here
3. Plant uptake or adsorption process in wetlands can remove:
a. COD and BOD
b. Suspended Solids
c. Nutrients
d. All of the above
Answer :- For Answers Click Here
4. In addition to being inert, the biofilm carriers in MBBR should have:
a. High surface area and low density compared to the density of water
b. High surface area and density close to the density of water
c. Low surface area and low density compared to the density of water
d. Low surface area and density close to the density of water
Answer :-
5.
Answer :-
6.
Answer :- For Answers Click Here
7. Which of the following description is correct about SBBR:
a. SBBR is a SBR combined with a biofilm growth on the surface of an inert media as biofilm carriers
b. SBBR is like an ASP having inert media as biofilm carriers operated in sequence of batches (batch mode operation)
c. SBBR is analogous to a MBBR operated in sequence of batches (batch mode operation)
d. All of the above
Answer :-
8. Identify the correct statements regarding MBR processes:
Statement I: A Membrane Bioreactors (MBR) is essentially a combination of aeration tank and secondary settling, followed by a membrane filtration.
Statement II: In MBRs. RO membranes are used for filtering solid biomass from treated water.
a. Statement I is correct, while statement II is incorrect
b. Statement Il is correct, while statement I is incorrect
c. Both, statements I and II are correct
d. Both, statements I and II are incorrect
Answer :-
9. Which of these process does not involve biomass growth on inert media:
a. SBBR
b. MBR
c. MBBR
d. Constructed Wetlands
Answer :-
10. A complete disinfection can be achieved through:
a. Constructed Wetlands
b. SBR
c. MBBR
d. None of the above
Answer :- For Answers Click Here
11. Settle stage is depicted here as:
a. Stage B
b. Stage C
c. Stage D
d. Stage E
Answer :-
12. Major removal of BOD takes place at:
a. Stage A
b. Stage B
c. Stage C
d. Stage D
Answer :- For Answers Click Here
13. Which of the following stages require air pump to remain off:
a. Stages C, D and E
b. Stages B and E
c. Stages A, C and D
d. Stage A. B and E
Answer :-
14. Stage D represents a:
a. Fill Stage
b. Settle Stage
c. Decant Stage
d. React Stage
Answer :-
15. Waste sludge is withdrawn at:
a. Stage B
b. Stage C
c. Stage D
d. Stage E
Answer :- For Answers Click Here
