Oxygen demand

Oxygen demand is an environmental chemistry term that may refer to:

• Biochemical oxygen demand (BOD), the amount of oxygen needed by organisms to break down organic material present in a water sample
• Carbonaceous biochemical oxygen demand (CBOD), the amount of oxygen needed to break down carbon compounds, excluding nitrogen compounds
• Chemical and biological oxygen demand, the combination of biochemical (BOD) and chemical oxygen demand (COD)
• Chemical oxygen demand (COD), a test commonly used to indirectly measure the amount of organic compounds in a water sample
• Nitrogenous oxygen demand (NOD), the amount of oxygen required to break down nitrogenous compounds in a water sample, like ammonia
• Theoretical oxygen demand (ThOD), the calculated amount of oxygen required to oxidize a compound to its final oxidation products

1. Chemical oxygen demand
2. Biochemical oxygen demand
3. Theoretical oxygen demand
4. Oxygen mask
5. Streeter–Phelps equation
6. Oxygen minimum zone
7. Wastewater quality indicators
8. Coronary circulation
9. Oxygen saturation
10. Oxygen therapy
11. Demand valve oxygen therapy
12. Membrane bioreactor
13. Oxygen sensor
14. Oxygen
15. Angina
16. Hypoxia (medicine)
17. Sewage
18. Sequencing batch reactor
19. High altitude breathing apparatus
20. Beta blocker