Discussion
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- Question
Which of the following is not employed as an oxidation method?
Options- A. Oxidation ponds
- B. Trickling filters
- C. Contact aerators
- D. All of these
- Correct Answer
- All of these
- 1. The biogas production process takes place at the temperature
Options- A. lesser than 25°C
- B. 25-40°C
- C. 45-60°C
- D. all of these Discuss
- 2. Nitrogen oxidation (nitrification)refers to the
Options- A. conversion of ammonium ions into nitrates through the activities of certain bacteria.
- B. changing of atmospheric nitrogen (N2) to nitrogen compounds
- C. sulfur is oxidized to the sulfate form through Thiobacillus bacteria
- D. none of the above Discuss
- 3. Which of the following fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?
Options- A. Saccharomyces cerevisiae
- B. VA Mycorrhiza
- C. Candida torulopsis
- D. Aspergillus niger Discuss
- 4. Denitrification is
Options- A. reduction of nitrate (NO3-) to nitrogen gas
- B. reduction of nitrate to organic nitrogen compounds
- C. both (a) and (b)
- D. changing of atmospheric nitrogen (N2) to nitrogen compounds Discuss
- 5. The energy value of biogas is typically
Options- A. 400-700 BTU/ft3
- B. 1,000 BTU/ft3
- C. 1500 BTU/ft3
- D. more than 5000 BTU/ft3 Discuss
- 6. Oxidation ponds are shallow ponds, generally designed at the depth of
Options- A. 2 to 40 feet
- B. 4 to 6 feet
- C. 1 to 3 feet
- D. 5 to 8 feet Discuss
- 7. Biomass
Options- A. provides the U.S. with about 50% of its energy
- B. consists largely of wood, animal, and human waste
- C. is unlikely to be a major source of energy globally
- D. offers the consumer high quality energy with low environmental impact Discuss
- 8. The magnitude of BOD of wastewater is related to
Options- A. bacterial count
- B. amount of organic material
- C. amount of inorganic material
- D. all of the above Discuss
- 9. Which of the following is responsible for the corrosion problem?
Options- A. Iron bacteria
- B. Sulfur bacteria
- C. Slime forming bacteria
- D. All of these Discuss
- 10. Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate
Options- A. water rich in organic carbon wastes but poor in phosphate
- B. water that are anoxic
- C. water rich in phosphate wastes but poor in organic carbon
- D. none of the above Discuss
Microbiology of Waste Water problems
Search Results
Correct Answer: all of these
Correct Answer: conversion of ammonium ions into nitrates through the activities of certain bacteria.
Correct Answer: VA Mycorrhiza
Correct Answer: both (a) and (b)
Correct Answer: 400-700 BTU/ft3
Correct Answer: 2 to 40 feet
Correct Answer: consists largely of wood, animal, and human waste
Correct Answer: amount of organic material
Correct Answer: Sulfur bacteria
Correct Answer: water rich in phosphate wastes but poor in organic carbon
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