Chemical oxygen demand

{
  "id": "MLC-T-ENV-004775",
  "term": "Chemical oxygen demand",
  "field": "Environment",
  "term_source": "Chemical Oxygen Demand",
  "definition": "1. A measure of the oxygen-consuming capacity of inorganic and organic matter present in water or wastewater; the amount of oxygen consumed from a chemical oxidant in a specific test.\n\n2. A measure of the oxygen-consuming capacity of inorganic and organic matter present in water; the amount of oxygen consumed from a chemical oxidant in a specific test.\n\n3. A measure of the oxygen-consuming capacity of inorganic and organic matter present in wastewater. COD is expressed as the amount of oxygen consumed in mg/l. Results do not necessarily correlate to the biochemical oxygen demand (BOD) because the chemical oxidant may react with substances that bacteria do not stabilize.\n\n4. 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.\n\n5. A measure of the oxygen required to oxidize all compounds, both organic and inorganic, in water.\n\n6. A measure of the oxygen-consuming capacity of inorganic and organic matter present in wastewater. COD is expressed as the amount of oxygen consumed in mg/L. Results do not necessarily correlate to the biochemical oxygen demand (BOD) because the chemical oxidant can react with substances that bacteria do not stabilize.\n\n7. A measure of the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as Ammonia and nitrite [COD].\n\n8. A measure of the amount of a water body's dissolved oxygen supply that would be used up in completely oxidizing added inorganic oxidizable compounds-such as in the oxidation of ammonia to nitrate. Biological oxygen demand (BOD) tests can only measure the biodegradable fraction of the total potential dissolved oxygen consumption by added wastes; however, COD tests may be used to measure the oxygen demand created by toxic organic or inorganic compounds as well as by biodegradable substances. A standard COD test, therefore, can be used to evaluate many industrial type wastes not readily analyzed for water quality factors by the sewage-oriented BOD test.",
  "abbreviation": "COD",
  "subject": "Water",
  "references": [
    "Environmental Issues Terms & Acronyms",
    "Watershed Protection Glossary",
    "National Pollutant Discharge Elimination System (NPDES) Glossary",
    "Drinking Water Technical & Legal Terms",
    "Terms of Environment",
    "NPDES Permit Writers Manual Glossary",
    "Federal LCA Commons Elementary Flow List for Life Cycle Assessment"
  ],
  "url": "https://mlchart.com/terminology/environment/chemical-oxygen-demand/"
}