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Chemical Oxygen Demand (COD) is a labortory test to give a measure of the amount of reactive organic materials in a sample of water. Like the five day Biochemical Oxygen Demand (BOD5) it demonstrates the amount of organics present by how much oxygen they consume over a period of carefully controlled conditions (the starting and ending oxidant concentrations are measured and the temperature is controlled)
Wiki User
∙ 15y ago
Wiki User
∙ 8y agoThe chemical oxygen demand test procedure is based on the chemical decomposition of organic and inorganic contaminants, dissolved or suspended in water
Wiki User
∙ 10y ago- the principle is the oxidation of organic compounds from a water sample
- chemical oxygen demand is a measure of water contamination with organic compounds
Wiki User
∙ 6y agoChemical oxygen demand is the necessary oxygen to be used in water chemical reactions (oxidation of iseveral impurities).
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What is mean chemical oxygen demand-?
The mean oxygen demand is the test done to indirectly determine the amount of organic compounds present in a water sample.
What is the chemical oxygen demand of drinking water?
500 mg/l
What element go you get when combining iridium oxygen and nitrogen?
Well, this is a fun type question. The answer to this funny question is Iron (Ir of iridium, O for oxygen and N for nitrogen).But in principle, there is no chemical reaction and the element iron is not formed when iridium is treated with oxygen and nitrogen
Is reacts with oxygen a physical property or a chemical property?
If something reacts with oxygen that is a description of a chemical property.
Is oxygen a chemical change or a physical?
Oxygen is a substance, an element out of the periodic system.
Why is there a demand for chemical oxygen?
There is a very large demand for chemical oxygen. Chemical oxygen is very sought after because it can be used to determine when water is contaminated with pollutants.
What is mean chemical oxygen demand-?
The mean oxygen demand is the test done to indirectly determine the amount of organic compounds present in a water sample.
What is Decreased by the breakdown of organic wastes?
Dissolved Oxygen
Waste water cod stand for?
COD = Chemical Oxygen Demand
What is the chemical oxygen demand of drinking water?
500 mg/l
What are the relationship between cod chemical oxygen demand and bod5 biological oxygen demand what does the ratio of bod cod or cod bod means?
BOD is inversely proportional to COD
Define the term cod and bod?
"COD" is Chemical Oxygen Demand," and BOD is Biochemical Oxygen Demand." These are the two processes that cause oxidation of an object in either a natural waterway or in industrial wastewater..
What is TOD BOD in water quality measurement?
There are three OD's used Total Oxygen Demand (TOD), Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD) They all measure the amount of oxygen that would be required to consume organic material in the water, BOD is the lowest (usually) as it measures demand from microbes eating easily digested organics (sugars etc), COD measures the demand from all other organics (alcohols etc) measured by digesting the material in strong chemical oxidants, and TOD is the total of the two. Oxygen demand is important to know in waste handling as reducing the oxygen in receiving stream can harm fish and other aquatic life.
What is the different between biochemical oxygen demand and biological oxygen demand?
Oxygen Demand -The amount of oxygen require to oxidize an organic materialBiochemical (Biological) Oxygen Demand (BOD) -The amount of oxygen required to oxidized any organic matter present in the water by microbes present in the water. Usually representin the easily "digestible" organics.Chemical Oxygen Demand (CO) - The amount of oxidants experessed as oxygen required to consume all organics in a water sampleTotal Oxygen Demand (TOD) the sum of COD and BODBiological Oxygen demand is the oxygen required to oxidized only organic matter by micro organisms (it is basically a prototype of actual process happening in treatment plant) while chemical oxygen demand is the oxygen consumed to oxidize all organic and inorganic matter and it employ chemicals to do this process that why it is way more fast then BOD experiment .
What is the significance of BOD and COD in water quality management?
Biochemical oxygen demand (BOD) and chemical oxygen demand (COD) both measure the quantity of organic compounds found in water. The makes them significant when is comes to the treatment of water.
What is theoretical oxygen demand?
The calculated amount of oxygen required to oxidized a compound to its final oxidation products . The organic matter of sewage is mainly composed of carbohydrats , protein, fats,and products of their decomposition . If the chemical formulaeof the organic matter are called as theoretical oxygen demand can be calculatd.
Chemical oxygen demand?
It is the amount of oyygen used by the microorganisns to decompose the waste material
