The amount of oxygen required for the oxidation of organic or inorganic matter by a strong oxidizing agent under acidic conditions.
The amount of oxygen consumed in complete chemical oxidation of matter present in waste water; indicates the content of slowly degradable organic matter present
COD is used as a measure of the oxygen equivalent of the organic matter content of the sample. Only the organic matter that is susceptible to oxidation by strong chemical oxidant. COD is typically used when there are industrial wastewater sources, comparing biological to chemical oxidation in the selection of treatment process and performances, or depending on the waste stream it can provide insight into the concentration of reduced inorganic metal inorganic, such as ferrous iron, sulfide, and manganese. Chromium (Cr): The MCL is 0.05 mg/L. The impact of chromium is not clearly defined, but it is known to adversely impact aquatic organisms.
(COD): the amount of oxygen necessary to oxidise the organic carbon completely to CO2, H2O and ammonia.
Impurity level of domestic and industrial effluents based upon the fact that all organic compounds (with few exceptions) can be oxidized by the action of strong oxidizing agents, under acid conditions, to carbon dioxide and water. COD and BOD analyses do not completely correlate on all samples of photographic effluent because the two methods do not measure the same oxygen-demanding chemicals, but the COD is usually a larger number than the BOD. The COD test is more reproducible than the BOD test.
(COD) — Quantitative measure of the strength of contamination by organic and inorganic carbon materials.
A measure of the oxygen consuming capacity of inorganic and organic matter present in water or wastewater. It is expressed as the amount of oxygen consumed from a chemical oxidant in a specific test. It does not differentiate between stable and unstable organic matter and thus does not necessarily correlate with biochemical oxygen demand.
A quantitative measure of the amount of oxygen required to oxidize all organic components in a unit volume on waste water - non-biodegradable as well as the BOD. The COD level can be determined more readily than BOD, but this measurement does not indicate how much of the waste can be decomposed by biological oxidation.
A measure of oxygen use equivalent to the portion of organic matter that is susceptible to oxidation by a strong chemical oxidizing agent.
The amount of organic pollutants found in lakes and rivers. Used as a measure of water quality.
The amount of oxygen used in the chemical oxidation of the matter present in a sample by a specified oxidising agent under standard conditions.
A standard test that measures the amount of the organic matter in wastewater that can be oxidized (burned up) by a very strong chemical oxidant.
The amount of oxygen required for total oxidation of organic and oxidizable inorganic compounds in water.
A measure ofoxygen use equivalent to the portion of organicmatter that is susceptible to oxidation by a strongchemical oxidizing agent.
The milligrams of oxygen required to chemically oxidize the organic contaminants in one liter of wastewater.
COD is an indicator of the quantity of excess organic matter in wastewater.
COD - The amount of oxygen needed to oxidise reactive chemicals in a water system
An indirect measure of the amount of oxygen used by inorganic and organic matter in water. The measure is a laboratory test based on a chemical oxidant and therefore does not necessarily correlate with biochemical oxygen demand.
Laboratory measurement of the amount of oxygen consumed under specific conditions in the oxidation of organic material by a strong chemical oxidant that decomposes both biodegradable (measured by biochemical oxygen demand) and nonbiodegradable organic matter.
Chemical substances which consume oxygen. It is a measure of theamount of oxygen required for the total chemical breakdown of organic substances in water.
A quantity connected with waste waters. It mainly serves to measure the ability of organic substances to consume oxygen in water.
The amount of oxygen utilized in the chemical reactions that occur in water as a result of the addition of wastes. COD is a measure of the pollution strength of chemical waste on dissolved oxygen in water.
The amount of oxygen that is required/consumed during the digestion of organic waste by chemical means. COD is a relative measure of water quality since the higher the COD, the greater the amount of organic material in the water.
MORE INFO the amount of oxygen (in mg) required for the complete chemical oxidation of organic and inorganic material in 1 litre of an effluent
A measure of the oxygen required to oxidize all compounds, both organic and inorganic, in water.
The amount of oxygen consumed by the chemical breakdown of organic and inorganic matter.
a measure of the oxygen equivalent of that portion of organic matter in a sample that is susceptible to oxidation by a strong chemical oxidant, an important, rapidly measured parameter for stream and industrial waste studies and for control of waste treatment plants.
The amount of oxygen required to oxidize organic and oxidizable inorganic compounds of water.
The quantity of oxygen used in biological and non-biological oxidation of materials in water; a measure of water quality.
In environmental chemistry, the chemical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water. Most applications of COD determine the amount of organic pollutants found in surface water (e.g. lakes and rivers), making COD a useful measure of water quality. It is expressed in milligrams per liter (mg/L), which indicates the mass of oxygen consumed per liter of solution.