Biological Treatment Of Waste Water(Environmental Biotechnology ) Questions and Answers

Question 1. The bacterial biofilms and floating weeds interact in duckweed ponds resulting in decrease of nutrient load and _______ in waste water.
  1.    Organic pollutant
  2.    Fish biomass
  3.    Oxygen
  4.    Water
Explanation:-
Answer: Option A. -> Organic pollutant
Answer: (a).Organic pollutant
Question 2. The hollow rhizomes of the reeds generate a hydraulic pathway thereby treating sewage by ___________
  1.    Flocculation
  2.    Bacterial activity
  3.    Precipitation
  4.    Sedimentation
Explanation:-
Answer: Option B. -> Bacterial activity
Answer: (b).Bacterial activity
Question 3. Which of the following factors doesn’t need to be considered in order to make the system of nutrient removal cost effective?
  1.    Waste water type
  2.    Space
  3.    Production rate
  4.    Water volume
Explanation:-
Answer: Option D. -> Water volume
Answer: (d).Water volume
Question 4. Algal fish ponds require artificial aeration.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option B. -> False
Answer: (b).False
Question 5. __________ method can be used for enhancing the performance of waste stabilization ponds.
  1.    Water hyacinth pond
  2.    Reed beds
  3.    Duck weed ponds
  4.    Algal fish ponds
Explanation:-
Answer: Option A. -> Water hyacinth pond
Answer: (a).Water hyacinth pond
Question 6. Nitrogen and __________ are the main source for eutrophication of surface water?
  1.    Phosphorus
  2.    Potassium
  3.    Calcium
  4.    Magnesium
Explanation:-
Answer: Option A. -> Phosphorus
Answer: (a).Phosphorus
Question 7. The total Nitrogen load = (soluble organic nitrogen and ammonia from incoming wastewater) + (nitrogen from Return Activated Sludge) + (nitrogen from recirculation).
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 8. Ammonia is converted into nitrate which is converted into__________ and released into the atmosphere.
  1.    Nitrogen gas
  2.    Nitrate
  3.    Sulphate
  4.    Carbon dioxide
Explanation:-
Answer: Option A. -> Nitrogen gas
Answer: (a).Nitrogen gas
Question 9. Which of the following process is leads to removal of nitrogen gas from water?
  1.    Nitrification
  2.    Ammonification
  3.    Denitrification
  4.    Desalination
Explanation:-
Answer: Option C. -> Denitrification
Answer: (c).Denitrification
Question 10. Particulate organic nitrogen is termed as the material that can pass through a 0.2-μm filter.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option B. -> False
Answer: (b).False
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