Tag: wastewater treatment - need and methods

Questions Related to wastewater treatment - need and methods

Use of _______ helps in water purification.

biology wastewater story sewage treatment wastewater treatment - need and methods conservation

  1. Sodium

  2. Alum

  3. Chlorine

  4. Both B and C

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Correct Option: D
Explanation:

There are several source of water pollution like industrial effluents, sewage water, radiobiological pollutants etc. Alum is used to clarify water by coagulating soil or mud particles whereas chlorine makes water free from pathogenic bacteria.

For recycling the waster articles are sorted out by 

biology wastewater story sewage treatment wastewater treatment - need and methods conservation

  1. Rag picker

  2. Big Business men

  3. Both of them

  4. None

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Correct Option: A
Explanation:

Waste articles are sorted out by Rag pickers and then rag pickers sell the articles to the industries engaged in recycling. 

Which of the following processes utilize specially bred strains of bacteria for cleaning up oil spills along beaches?

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. Primary succession

  2. Bioremediation

  3. Decomposition

  4. Coevolution

  5. Eutrophication

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Correct Option: B

Which of the following plant should be grown along the sewage pond?

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. Neem

  2. Eucalyptus

  3. Tulsi

  4. All of the above

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Correct Option: B

Places which does not receive rain for a long time experiences

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. drought

  2. flood

  3. landslide

  4. earthquake

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Correct Option: A

In order to have safe drinking water, it should be

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. Filtered

  2. Boiled

  3. Freeze

  4. Both A and B

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Correct Option: D

The masses of bacteria held together by slime and fungal filaments to form mesh like structures are called as

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. primary sludge

  2. flocs

  3. activated sludge

  4. anaerobic sludge

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Correct Option: A
Explanation:

Physical removal of particles by filtration and sedimentation. Then the grit is removed by sedimentation. All solids that settle form the primary sludge and the supernatant forms the effluent. The primary effluent is passed into large aeration tanks where it is constantly agitated mechanically and the air is pumped into it. This allows vigorous growth of useful aerobic microbes into flocs (masses of bacteria associated with fungal filaments to form mesh-like structures).

So the correct option is "flocs".

WWT is also called as 

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. Sewage treatment

  2. Cleaning of water

  3. Activated sludge

  4. None of the above

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Correct Option: A

Which of the following equipment is used to study thermal behaviour of water? 

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. MALDI-TOF

  2. Realtime PCR

  3. Differential scanning calorimeter

  4. SEM

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Correct Option: C
Explanation:
  • Differential scanning calorimetry or DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature.
  •  Hence, Differential scanning calorimeter is used to study the thermal behaviour of water.
  • So, the correct answer is 'Differential scanning calorimeter'.

What percent of earth's water is fresh?

zoology waste water story sewage treatment wastewater treatment - need and methods wastewater story

  1. 1

  2. 2

  3. 3

  4. 4

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Correct Option: C