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Oxygen Demand -The amount of oxygen require to oxidize an organic material

Biochemical (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 sample

Total Oxygen Demand (TOD) the sum of COD and BOD
Biological 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 .

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Q: What is the different between biochemical oxygen demand and biological oxygen demand?
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Related questions

What is a biological oxygen demand?

A biological oxygen demand is another term for a biochemical oxygen demand - the amount of oxygen needed by aerobic microorganisms to decompose all the organic matter in a sample of water - used as a measure of pollution.


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It determines the amount of dissolved oxygen that is consumed by aerobic biological microorganisms in water. It is measured by the amount of oxygen that is consumed per liter of sample during 5 days of incubation it is in milligrams.


What has the author Jeff Pardo written?

Jeff Pardo has written: 'A test of the effects of domestic sewage on the growth of the common blue mussel, Mytilus edulis, in an aquacultural system' -- subject(s): Biochemical oxygen demand, Biological treatment, Growth, Mussel culture, Mytilus edulis, Sewage


Does a biological oxygen demand value would be a negative value?

The only way a biochemical oxygen demand value could be negative is if oxygen increased in your incubation. This could result from several errors, but most likely light was allowed to penetrate your bottle allowing photosynthesis to occur. If everything was done correctly (e.g. insturments are calibrated and working, no errors were made in calculations) you should have at least a 1mg/L difference between initial and final dissolved oxygen readings yielding a positive value.


What is different between supply and demand?

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