| NIBSC | National Institute for Biological Standards and Control |
|---|---|
| OBE | Office of Biological Education |
| QF | quality factor; query fever; quick freeze; relative biological effectiveness |
| RBD | recurrent brief depression; relative biological dose; right border of dullness |
| RBE | relative biological effectiveness |
| biological oxidation |
The process by which bacteria and other types of micro-organisms consume dissolved oxygen and organic substances in waste water, using the energy released to convert organic carbon into carbon dioxide and cellular material.
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