NPTEL Wastewater Treatment and Recycling Week 11 Assignment Answers 2024
1. The most critical stage for effective recycling or reuse of wastewater is:
a. Water reclamation through treatment of wastewater
b. Water use reduction by adopting water saving practices
c. Preventing transport of wastewater to offsites
d. Storing wastewater for continued reuse/recycling applications
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2. Level of treatment required for industrial effluent recycling depends on:
a. Level of pollution in industrial effluent generated
b. Water quality requirements of planned reuse
d. Regulatory mandates for treatment
d. All of the above
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3. Gardening and lawns irrigation with treated wastewater is an example of:
a. Indirect reuse of wastewater
b. Direct, contact reuse of wastewater
c. Direct, non-contact reuse of wastewater
d. Indirect disposal of wastewater
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4. Municipal sewage recycling typically includes:
a. Treatment and recycling of combined greywater and stormwater, but not the blackwater
b. Treatment and recycling of combined greywater and blackwater, but not the stormwater
c. Treatment and recycling of combined blackwater and stormwater, but not the greywater
d. Treatment and recycling of combined greywater, blackwater as well as stormwater
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5. Unless there is a specific requirement in industrial reuse, which of these pollutants are typically not removed during treatment of wastewater for general reuse and recycling:
a. Suspended Solids
b. Dissolved Salts
c. BOD and COD
d. All of the above
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6. Zero Liquid Discharge (ZLD) is a concept applied to / used for:
a. Municipal sewage recycling
b. Stormwater and rainwater reuse
c. Industrial effluent recycling
d. Groundwater abstraction for irrigation
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7. For which of the following reuse application, US-EPA/USAID Guidelines recommends disinfection treatment stage:
a. Urban landscape irrigation
b. Irrigation of food crops that are not commercially processed
c. Irrigation of food crops that are commercially processed
d. All of the above
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8. For reusing treated wastewater for drip irrigation, the required degree of treatment is:
a. Tertiary treatment
b. Secondary treatment
c. Primary treatment
d. Preliminary treatment
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9. Identify the correct statements regarding decentralized wastewater management:
Statement I: Decentralized wastewater management is always cost-effective solution for wastewater management over centralized systems.
Statement II: Further, decentralized systems do not require long-distance transport of wastewater.
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
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10.
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11. Which of the following is a case of agricultural recuse of treated wastewater:
a. Only Link 2
b. Link 2 and 7
c. Link 3 and 7
d. Link 2 and 3
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12. Which of the following links depict a case of direct potable reuse:
a. Link 5 and 6
b. Link 1 and 3
c. Link 4 and 3
d. None of the Links shown in figure
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13. The total amount of wastewater generated is (in MLD):
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14. The total water available for potential reuse is (in MLD):
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15. If the treated wastewater is reused in irrigation (at an average of 6 mm/day), the potential area
that can be irrigated daily with the treated wastewater (in hectares):
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