Bioremediation

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Questions and Answers

What are the major benefits of bioremediation?

  • Completely natural process with almost no harmful side effects (correct)
  • Can be carried out in situ with no dangerous transport
  • Requires high energy consumption compared to other methods
  • Requires minimal equipment and energy

What factors are essential for effective microbial bioremediation?

  • Low soil moisture to prevent waterlogging
  • A wide pH range to accommodate different microbial growth
  • High oxygen levels to support anaerobic biodegradation
  • Appropriate temperatures for microbial growth and good microbial growth support (correct)

What is the best range of pH to ensure good microbial growth for bioremediation?

  • pH around 4 to 5
  • pH around 6.5 to 7.5 (correct)
  • pH around 8 to 9
  • pH around 2 to 3

What is the suitable soil moisture level for microbial bioremediation?

<p>From 50–70% of the water holding capacity (B)</p> Signup and view all the answers

What should be enough to support aerobic biodegradation in soil or water for microbial bioremediation?

<p>Oxygen level of 0.4 mg/liter (A)</p> Signup and view all the answers

Which of the following is a benefit of in situ bioremediation?

<p>Low cost and low maintenance (B)</p> Signup and view all the answers

What is a common example of in situ bioremediation?

<p>Phytoremediation (A)</p> Signup and view all the answers

Under what conditions may ex-situ bioremediation be necessary?

<p>If the climate is too cold for microbe activity (A)</p> Signup and view all the answers

What is a key advantage of in situ bioremediation over ex-situ bioremediation?

<p>Minimal disruption to soil structure (C)</p> Signup and view all the answers

What is the main mechanism of microbial degradation of petroleum pollutants?

<p>Catalysis of intracellular enzymes (B)</p> Signup and view all the answers

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