the quantity of dissolved oxygen used in the breakdown of organic matter by bacteria and in the oxidation of minerals such as ferrous iron

A measure of the amount of oxygen consumed by natural, biological processes that break down organic matter, such as those that take place when manure or sawdust is put in water. High levels of oxygen-demanding wastes in waters deplete dissolved oxygen (DO) thereby endangering aquatic life. Sometimes referred to as "biological oxygen demand. Chemical oxygen demand (COD) is a measure of the oxygen consumed when organic matter is broken down chemically rather than biologically. COD can be determined much more quickly than BOD and more accurately reflects the amount of organic matter in a water sample. BOD is a standard measure of water quality.

the rate at which organisms use the oxygen in water while stabilizing decomposable organic matter under aerobic conditions. In decomposition, organic matter serves as food for the bacteria and energy results from its oxidation. BOD measurements are used as a measure of the organic strength of wastes in water.

The BOD test measures the amount of oxygen that a chemical solution, or effluent consumes over a five-day period through biological degradation. Knowing the oxygen demand of a discharged waste is important because strong oxygen-demanding wastes can overload the aeration capacity of a secondary treatment plant. Discharging improperly treated wastes can deplete the amount of dissolved oxygen in a receiving body of water. The BOD analysis attempts to duplicate in the laboratory the environmental condition in a receiving body of water and to measure the oxygen demand that the chemical or effluent exerts on it. A BOD of 400 mg/L for an effluent means that one litre of the waste would consume 400 milligrams of oxygen in 5 days in a natural stream. As the biochemical oxygen demand increases, more dissolved oxygen is removed from the stream, leaving less for fish and other aquatic life.

(BOD) — Quantitative measure of the strength of contamination by organic carbon materials.

a laboratory measurement of wastewater that is one of the main indicators of the quantity of pollutants present. BOD measures the amount of oxygen that will be consumed by microorganisms when oxygen in wastewater biologically reacts with organic material in the wastewater. A decrease in BOD indicates that water quality is improving.

Biochemical oxygen demand, generally referred to as BOD, is a measure of the oxygen utilized by bacteria to reduce the organic material contained in wastewater. It is simply an indicator of the organic strength of wastewater. As the strength of wastewater increases, greater amounts of energy are required to clean the wastewater while increasing the costs as well.

The quantity of oxygen used by bacteria in the oxygenation of organic matter in a specific time, at a specific temperature and under specific conditions.

a laboratory test to measure the amount of oxygen consumed by microorganisms as they decompose organic matter; the test indicates the amount of organic material in a water sample

A quantitative measure of the oxygen needed by bacteria and microorganisms for the biological oxidation of organic wastes in a unit volume of waste water. BOD is generally measured in milligrams per liter (rng/1) of oxygen consumed over a five-day period. Although complete biological decomposition of, organic waste requires about 20 days, the five-day BOD is about two-thirds of the total oxygen requirement and, therefore, is a practical measure of waste concentration. In waste treatment language, BOD is most frequently stated as the percentage removed during treatment, or remaining after treatment.

A commonly used gross measurement of the concentration of biodegradable organic impurities in wastewater. The amount of oxygen, expressed in milligrams per liter (mg/L), required by bacteria while stabilizing, digesting, or treating organic matter under aerobic conditions is determined by the availability of material in the wastewater to be used as biological food and the amount of oxygen used by the microorganisms during oxidation.

The demand for oxygen by water-borne organisms. Used as an indication of water quality.

used to describe the amount of oxygen that will be consumed by microorganisms during the biological reaction of oxygen with organic materials.

The amount of dissolved oxygen consumed by micro-biological action when a sample is incubated, usually for 5 days at 20 deg. C. (in the UK expressed as BOD5 ). In some countries the BOD test is carried out over differing periods such as 7 days (BOD7), and 10 days (BOD10).

The amount of oxygen used by microorganisms in the breakdown or decay of organic matter in a waterbody.

The depletion of oxygen associated with eutrophication from excess nutrient inputs or with of discharge organic matter.

The oxygen used in meeting the metabolic needs of aerobic microorganisms in water-rich inorganic matter.

the amount of free oxygen used by bacteria in decomposition and decay processes; measured in mg/L (parts per million).

A standard test that measures the strength of wastewater by determining the quantity of oxygen that is naturally consumed by the wastewater under standard conditions. Generally, it is measured in mg/l.

Compare? A measure of the oxygen required to break down organic materials in water. Higher organic loads require larger amounts of oxygen and may reduce the amount of oxygen available for fish and aquatic life below acceptable levels.

Amount of oxygen consumed in the oxidation of organic matter by biological action under standard test conditions; often used as a measure of the strength of sewage and waste water.

A measure of the quantity of oxygen used by organisms to decompose organic matter, usually measured at the end of a five-day period.

The amount of oxygen required to decompose a given amount of organic compounds to simple, stable substances within a specified time at a specified temperature. BOD serves as a guide to indicate the degree of organic pollution in water.

A commonlyused gross measurement of the concentration ofbiodegradable organic impurities in wastewater.The amount of oxygen, expressed in milligrams perliter (mg/L), required by bacteria while stabilizing,digesting, or treating organic matter under aerobicconditions is determined by the availability ofmaterial in the wastewater to be used as biologicalfood and the amount of oxygen used by the micro-organisms during oxidation.

The BOD test is used to measure the strength of wastewater. The BOD of wastewater determines the milligrams per liter of oxygen required during stabilization of decomposable organic matter by aerobic bacteria action. Also, the total milligrams of oxygen required over a five-day test period to biologically assimilate the organic contaminants in one liter of wastewater maintained at 20 degrees Centigrade.

The weight of oxygen taken up mainly as a result of the oxidation of the constituents of a sample of water by biological action; expressed as the number of parts per million of oxygen taken up by the sample from water originally saturated with air, usually over a period of five days at 20 degrees centigrade. A standard means of estimating the degree of contamination of water.

The amount of oxygen used by micro-organisms to break down organic matter.

A measure of the amount of organic pollution in water. It is defined as the amount of dissolved oxygen consumed by biochemical action, when a sample of water is kept in the dark at 20° C for 5 days.

The dissolved oxygen required to decompose organic matter in water. It is a measure of pollution since heavy waste loads have a high demand for oxygen.

The amount of dissolved oxygen parts per million utilized in the aerobic biochemical oxidation of the decomposable organic matter in mill wastewater.

(BOD): a measure of the quantity of oxygen used by microorganisms in the aerobic oxidation of organic matter.

A measure of the organic material that can be readily oxidized through microbial decomposition, consuming oxygen dissolved in water. BOD is often used to assess the effects of a discharge, especially sewage.

The amount of oxygen used when organic matter undergoes decomposition by microorganisms.Testing for BOD is done to assess the amount of organic matter in water.

The amount of oxygen uptake by microorganisms that decompose organic waste matter in water over a standard 5 day test at 20 degree C. It is therefore used as a measure of the amount of certain types of pollutant in water. A high BOD infers large ammounts of organic pollution.

The quantity of oxygen-demanding materials present in a sample as measured by a specific test. A major objective of conventional wastewater treatment is to reduce the biochemical oxygen demand so that the oxygen content of the water body will not be significantly reduced. Although BOD is not a specific compound, it is defined as a conventional pollutant under the federal Clean Water Act.

A laboratory measurement of the "strength" or potency of an organic or inorganic waste; the test determines the amount of oxygen used by microorganisms as they biochemically degrade (reduce to simple byproducts) the waste. BOD values provide a somewhat standard measure of how much oxygen will be required to degrade a waste, and therefore reflect the effect the waste may have on fish or other aquatic organisms that require oxygen to live.

The quantity of oxygen utilized in the biochemical oxidation of organic matter in a specified time and at a specified temperature. Waste discharges containing high levels of B.O.D. will deplete oxygen supplies in receiving waters..

See BOD

( BOD) - The amount of oxygen required by micro organisms, usually in polluted water, slurry or industrial effluent for oxidation processes. Measured as milligrams of O2 taken up by 1 l of the sample when incubated at a standard temperature of 20oC for 5 days

The amount of dissolved oxygen utilized by aquatic microorganisms.

a measure of the amount of oxygen necessary to decompose organic materials in a volume of water. As the amount of organic waste in water increases, more oxygen is used, resulting in a high BOD.

BOD is a measure of the amount of oxygen needed for bacteria to consume the organic components of wastewater.

The amount of oxygen that is required/consumed by bacteria during the digestion of the organic waste in water. BOD is a relative measure of water quality since the higher the BOD, the greater the amount of organic waste in the water. Surcharges and fines are based on the BOD levels of the wastewater.

is an amount of oxygen which would be used if the organic wastes in a litre of polluted water were broken down by decomposing organisms in that water

MORE INFO the amount of oxygen (in mg) required by aerobic bacteria to decompose the biodegradable organic material in 1 litre of an effluent

A measure of the amount of oxygen consumed in the biological processes that break down organic matter in water. The greater the BOD, the greater the degree of pollution.

Amount of dissolved oxygen required by organisms for the aerobic decomposition of organic matter present in water.

The amount of oxygen (measured in mg/L) required in the oxidation of organic matter by biological action under specific standard test conditions.

A measure of the amount of oxygen used by microorganisms during the process of decomposing waste. The BOD is usually measured in milligrams per liter or in parts per million of oxygen required. An excessive BOD or COD would result in using up the oxygen in rivers and lakes causing fish to die.

the amount of oxygen taken up by microorganisms that decompose organic waste matter in water.

BOD - biochemical (biological) oxygen demand is a test used to measure the concentration of biodegradable organic matter present in a sample of water. It can be used to infer the general quality of the water and its degree of pollution by biodegradable organic matter. It is used in water quality management and assessment, Ecology and environmental science.