Biological oxygen demand. A measure of the oxygen required by micro-organisms to oxidise organic matter in wastewater.
A standard test to assess wastewater strength. It is a measurement of the oxygen used during the biochemical oxidation of organic matter over a five day period at a temperature of 68 degrees Fahrenheit.
The biochemical oxygen demand of wastewater during decomposition occurring over a 5-day period. A measure of the organic content of wastewater.