Question

Measurement of the rate of oxygen utilization by a unit volume of water over a period of time is to measure

• A. Biochemical oxygen demand
• B. Biosynthetic pathway
• C. Biogas generation
• D. Fermentation

Answer 1

The correct option is A Biochemical oxygen demand

• Biochemical Oxygen Demand (BOD)is defined as the amount of dissolved oxygen needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
• BOD is an important water quality parameter because it provides an index to assess the effect discharged wastewater will have on the receiving environment. The higher the BOD value, the greater the amount of organic matter or “food” available for oxygen-consuming bacteria.
  
• Hence Measurement of the rate of oxygen utilization by a unit volume of water over a period of time is to measure Biochemical oxygen demand.
• So, the correct answer is 'Biochemical oxygen demand'.