Tag: sewage treatment

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Questions Related to sewage treatment

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

Use of _______ helps in water purification.

  1. Sodium

  2. Alum

  3. Chlorine

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Primary succession

  2. Bioremediation

  3. Decomposition

  4. Coevolution

  5. Eutrophication
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bioremediation is the use of microorganisms (like bacteria or fungi) to consume and break down environmental pollutants, such as oil spills, into less toxic substances.

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

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

  1. Neem

  2. Eucalyptus

  3. Tulsi

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Eucalyptus trees are known for their high water consumption and ability to thrive in damp, nutrient-rich environments like those found near sewage ponds, helping to manage water levels and absorb nutrients.

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

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

  1. primary sludge

  2. flocs

  3. activated sludge

  4. anaerobic sludge
Reveal answer Fill a bubble to check yourself
A Correct answer
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".

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

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

  1. MALDI-TOF

  2. Realtime PCR

  3. Differential scanning calorimeter

  4. SEM
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.