Biochemical oxygen demand (BOD) | Britannica
https://www.britannica.com/science/biochemical-oxygen-demand
WEBbiochemical oxygen demand (BOD), the amount of dissolved oxygen used by microorganisms in the biological process of metabolizing organic matter in water. The more organic matter there is (e.g., in sewage and polluted bodies of water), the greater the BOD; and the greater the BOD, the lower the amount of dissolved oxygen available …
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