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Microbiology of Waste Water problems

  • 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. 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
  • Discuss
  • 3. 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
  • 4. 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
  • 5. 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
  • 6. 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
  • 7. 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
  • 8. What is an anaerobic digester?

  • Options
  • A. New diet drink
  • B. Microbe that eats hazardous waste
  • C. Method to convert agricultural waste into a biogas
  • D. All of the above
  • Discuss
  • 9. Which of the following is generally not referred to the sewerage system?

  • Options
  • A. Sanitary sewers
  • B. Storm sewers
  • C. Combined sewers
  • D. Solid sewers
  • Discuss
  • 10. The filtering medium of trickling filters is coated with microbial flora, known as

  • Options
  • A. zoological film
  • B. geological film
  • C. zooglocal film
  • D. none of these
  • Discuss

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