Question

Q. Which of the following processes are included in "In situ bioremediation‟?

Select the correct answer using the code given below:

• A.
  1 and 2 only
• B.
  2 and 3 only
• C.
  1 and 3 only
• D.
  1, 2 and 3

Answer 1

The correct option is A

1 and 2 only

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.