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 .
different from channel
Along a linear demand curve elasticity varies from point to point of the demand curve with respect to different price, but slope is constant
Negative demand No demand Latent demand Declining demand Irregular demand Full demand Overfull demand Unwholesome demand
distinguish between price elasticity of demand and income elasticity of demand
Demand refers to the entire relationship between the prices and the quality of the product. Quality demand refers to one particular point on the demand curve.
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.
Biochemical oxygen demand, BOD. Cuger Brant
In chemistry b.o.d means " biochemical oxygen demand "
BOD is inversely proportional to COD
good qualitywaater good quality water
1kg Jaggery = 1kg BOD
Some of the chemical companies offer biochemical oxygen on demand would be the Myron L Company, Mantech, Environmental Services by Daniel L. Theobald, Ovivo, Westech Engineering, and Cleveland Biotech Ltd.
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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.
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
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.
Demand is the pressure that we put on the environment is order to meet our needs and wants but Supply is the resources that are taken from the environment.