Consequences of Untreated Wastewater Disposal Quiz

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Questions and Answers

All of the following may result as a consequence of untreated waste water disposal except ----

  • Enhanced dissemination of pathogenic microbes
  • Accumulation and dissemination of toxic chemicals that endanger ecosystems and threaten public health.
  • Eutrophication / algal bloom of natural bodies of water
  • None of the above (correct)

Pollutants that are found in wastewater may be------

  • Pathogenic microorganisms
  • Particulate, Colloidal, and dissolved organic matters
  • a and b, plus Dissolved inorganic nutrients (P, N others) (correct)
  • None of the above

The biochemical reaction of the fecal coliform bacteria, E. coli includes all, except ____

  • Indole and methyl red test positive.
  • Pink colonies on EMB agar (correct)
  • Vogus-Proskauer and citrate test negative
  • Pink colonies on MacConkey agar

The main objectives of sewage treatment includes ___

<p>a and b plus, removal/reduction of nutrients i.e., N,P (C)</p> Signup and view all the answers

Which of the following is not true about the BOD of wastewater?

<p>Unpolluted waters have high BOD (A)</p> Signup and view all the answers

A typical primary wastewater treatment procedure involves __________

<p>Only a and b (D)</p> Signup and view all the answers

Aerobic secondary wastewater treatment may involve all, except, _________

<p>Chlorination to destroy potentially pathogenic microorganisms (C)</p> Signup and view all the answers

The scarcity of water for proper hygiene and sanitation may lead to all, except ____

<p>None of the above (D)</p> Signup and view all the answers

The anaerobic sludge digestion in the secondary sewage treatment involves ____

<p>Conversion of Methane into Hydrogen and carbon dioxide (B)</p> Signup and view all the answers

Activated sludge process involves _________

<p>Only a and b (D)</p> Signup and view all the answers

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Study Notes

Consequences of Untreated Waste Water Disposal

  • Untreated waste water disposal can lead to various consequences, including pollution, health problems, and environmental damage.

Pollutants in Wastewater

  • Wastewater may contain pollutants such as suspended solids, organic matter, pathogens, and nutrients.

Biochemical Reaction of E. coli

  • The biochemical reaction of E. coli involves fermentation, respiration, and decomposition, but not photosynthesis.

Objectives of Sewage Treatment

  • The main objectives of sewage treatment include removing pollutants, reducing organic matter, and eliminating pathogens.

Biochemical Oxygen Demand (BOD)

  • BOD is not a measure of the amount of oxygen in wastewater, but rather a measure of the amount of oxygen required for microbial decomposition.

Primary Wastewater Treatment

  • A typical primary wastewater treatment procedure involves physical processes such as sedimentation, flotation, and filtration to remove suspended solids and organic matter.

Aerobic Secondary Wastewater Treatment

  • Aerobic secondary wastewater treatment may involve processes such as activated sludge, trickling filters, and oxidation ponds, but not anaerobic digestion.

Scarcity of Water for Hygiene and Sanitation

  • The scarcity of water for proper hygiene and sanitation may lead to health problems, increased risk of disease, and environmental degradation, but not improved water quality.

Anaerobic Sludge Digestion

  • Anaerobic sludge digestion in the secondary sewage treatment involves the breakdown of organic matter by microorganisms in the absence of oxygen, producing biogas and a stable sludge residue.

Activated Sludge Process

  • Activated sludge process involves the use of microorganisms to break down organic matter in wastewater, producing a stable sludge residue and a treated effluent.

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