Question

The order of B.O.D. reaction is:

• A. \( 0 \)
• B. \( 1 \)
• C. \( 2 \)
• D. \( 0.5 \)

Hint:

BOD degradation follows first-order kinetics because oxygen depletion depends on remaining organic matter.

Answer 1

The Correct Option is B

Step 1: The biochemical oxygen demand (BOD) reaction follows a first-order kinetics: \[ \frac{dL}{dt} = -kL \] where: - \( L \) is the remaining oxygen demand, - \( k \) is the rate constant. Step 2: The first-order reaction implies that the rate depends only on the concentration of organic matter. Thus, the correct answer is (B) 1.