BOD – Biological Oxygen Demand is one of the most important parameters used to assess water quality.

It measures the amount of oxygen required by aerobic microorganisms to break down organic matter present in water.

What is Ultimate Biological Oxygen Demand (BODu)?

Ultimate Biological Oxygen Demand (BODu) refers to the total amount of oxygen required to completely decompose all biodegradable organic matter in water.

BOD Diagram

Advantages

Most closely models natural environmental conditions when used with the proper seed.

Disadvantages

  • Toxic materials can kill microorganisms.
  • It takes five days to perform the test.
  • The test measures only biodegradable matter.