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Q. Which of the following processes are included in "In situ bioremediation‟?
  1. Bioventing.
  2. Biosparging.
  3. Landforming.
Select the correct answer using the code given below:

  1. 1 and 2 only

  2. 1, 2 and 3

  3. 1 and 3 only

  4. 2 and 3 only


Solution

The correct option is A
1 and 2 only
Explanation:

Statement 1 is correct:
Bioventing is a process of stimulating the natural in situ biodegradation of contaminants in soil by providing air or oxygen to existing soil microorganisms.

Statement 2 is correct: Biosparging is an in-situ remediation technology in which air (or oxygen) and nutrients (if needed) are injected into the saturated zone to increase the biological activity of the indigenous microorganisms.

Statement 3 is incorrect: Landfarming is an ex-situ waste treatment process that is performed in the upper soil zone or in biotreatment cells.

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