Biological Oxygen Demand

BOD measures the oxygen bacteria require to break down organic materials in water. It measures water quality and organic contamination.

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Aquatic ecosystem health depends on BOD. Since organic matter decomposes with oxygen, it indirectly measures water body organic contamination. In the BOD test, bacteria breakdown organic waste in a sealed container and consume oxygen. Milligrams of oxygen used per litre of water (mg/L) are usually reported.

High BOD levels impair aquatic life because microbes eat oxygen, leaving less for other species. BOD levels may be used to establish whether a water body can sustain aquatic life, and excessive levels can signal that the water is polluted and dangerous to aquatic creatures.

Wastewater treatment methods depend on BOD. Wastewater treatment removes contaminants, including organic matter, before discharge. Wastewater treatment facilities monitor BOD in influent and effluent to assess treatment efficacy. The removal efficiency, the ratio of BOD in the influent to BOD in the effluent, is used to check the treatment system.

BOD manages agricultural, stormwater, and industrial runoff in addition to wastewater treatment. Some sources with high BOD may include environmental contaminants. Environmental authorities can guarantee these discharges don’t pollute by detecting BOD levels.

BOD is crucial for aquatic ecosystem health and pollution management. BOD levels help authorities find and eliminate organic pollutants, preserving aquatic life and the environment.

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