This is a measurement of the oxygen depletion in a water sample incubated under controlled conditions over a period of time. The aerobic decomposition of organic matter by bacteria in the sample requires oxygen. BOD is an important measurement of the impact that sewage discharge may have upon a water body because a certain amount of oxygen will be used in the breakdown of the wastewater.
"BOD" is a measure of the oxygen needed to provide for the breakdown of the organic compounds in a water sample. If high levels of BOD are added to a natural water system through contaminated stormwater runoff or wastewater discharges, oxygen available to support existing aquatic life will be reduced by this additional demand.
A standard test for measuring the amount of dissolved oxygen utilized by aquatic microorganisms.
A measure of the amount of oxygen needed by aquatic organisms to break down solids and other readily degradable organic matter present in waste water. The BOD7 determination used in Finland indicates oxygen consumption due to a given volume of waste water in 7 days
BOD is typically reported as 5 day BOD and ultimate BOD at 20 C and reported as milligrams of oxygen consumed per liter (mg O/L). BOD 5 is used by regulatory agencies for monitoring wastewater treatment facilities and monitoring surface water quality. BOD is the biochemical oxygen demand of the water and it is related to the concentration of the bacterial facilitated decomposable organic material in the water. A sample with a 5 day BOD between 1 and 2 mg O/L indicates a very clean water, 3.0 to 5.0 mg O/L indicates a moderately clean water and 5 mg O/L indicates a nearby pollution source. BOD is a laboratory test that requires an oxygen sensing meter, incubator, nitrifying inhibitors, and a source of bacteria.
combined oxygen requirements of all organisms within a waterway.
Potential for microorganisms in decomposing organic matter to consume oxygen in water. Biological Oxygen Demand readings provide a measure of the effects of organic pollution on receiving waters.
The amount of oxygen needed by the organisms living in an aquatic environment. In cases of high biological oxygen demand (BOD), less oxygen is available for other organisms to be able to grow. Oxygen is needed by living organisms for cellular respiration. This is a process in cells that releases energy for cell reactions.
The amount of oxygen used for growth by organisms in water that contains organic matter. Commonly used as an indicator of pollution levels.
The amount of oxygen required by aerobic microorganisms to decompose the organic matter in sample of water. Used as a measure of the degree of water pollution.
(3) a measure of the oxygen used in meeting the metabolic needs of aerobic microorganisms in water rich in organic matter.
A measurement of the oxygen demand of organic material which, when breaking down in water, consumes oxygen in the water column.
A measure of the amount of oxygen consumed by micro-organisms in breaking down organic matter in effluent during a certain period.
See SN biochemical oxygen demand.
The amount of oxygen required by aerobic biological processes to break down the organic matter in water. BOD is a measure of the pollution strength of biodegradable waste on dissolved oxygen in water.
The amount of oxygen needed for aerobic microorganisms to function in organic-rich water such as sewage.
the amount of dissolved oxygen in water that will be consumed as the organic matter present is decomposed. High BOD means low water quality and probably the development of anaerobic waters. It usually results when waters have received organic wastes. See also Chemical oxygen demand. Bor - cool.
amount of dissolved oxygen needed to break down (oxidize) organic materials to carbon dioxide, water, and minerals in a given volume of water at a certain temperature over a specified time period.
An indirect measure of the concentration of biologically degradable material present in organic wastes. It usually reflects the amount of oxygen consumed in five days by biological processes breaking down organic waste.