Definitions for "Biological oxygen demand"
The rate at which oxygen disappears from a sample of water - a measure of deoxygenating ability commonly used as an index of the quality of sewage effluent.
Amount of dissolved oxygen needed by aerobic decomposers to break down the organic materials in a given volume of water at a certain temperature over a specified time period. See dissolved oxygen content.
the amount of dissolved oxygen that will disappear from an enclosed water sample as aerobic bacteria decompose the organic material in the water.