write short note on biological oxygen demand
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biological oxygen demand (BOD)
Standard method for indirect measurement of the amount of organic pollution (that can be oxidized biologically) in a sample of water. BOD test procedure is based on the activities of bacteria and other aerobic microorganisms (microbes), which feed on organic matter in presence of oxygen. The result of a BOD test indicates the amount of water-dissolved oxygen (expressed as parts per million or milligrams per liter of water) consumed by microbes incubated in darkness for five days at an ambient temperature of 20°C. Higher the BOD, higher the amount of pollution in the test sample. For the contaminants that cannot be oxidized biologically, chemical oxygen demand (COD) method is used. Also called BOD5.
USAGE EXAMPLES
I had to figure out the biological oxygen demand, because that would help us to figure out what we needed to do.
You may want to take a biological oxygen demand to see if you are doing any damage to the surrounding environment.
You should be taking many tests of the biological oxygen demand to make sure that your factory is not doing any harm.
Standard method for indirect measurement of the amount of organic pollution (that can be oxidized biologically) in a sample of water. BOD test procedure is based on the activities of bacteria and other aerobic microorganisms (microbes), which feed on organic matter in presence of oxygen. The result of a BOD test indicates the amount of water-dissolved oxygen (expressed as parts per million or milligrams per liter of water) consumed by microbes incubated in darkness for five days at an ambient temperature of 20°C. Higher the BOD, higher the amount of pollution in the test sample. For the contaminants that cannot be oxidized biologically, chemical oxygen demand (COD) method is used. Also called BOD5.
USAGE EXAMPLES
I had to figure out the biological oxygen demand, because that would help us to figure out what we needed to do.
You may want to take a biological oxygen demand to see if you are doing any damage to the surrounding environment.
You should be taking many tests of the biological oxygen demand to make sure that your factory is not doing any harm.
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0xygen Cycle➫ The process by which oxygen released into the atmosphere by photosynthetic organisms.
♦ Oxygen is an element that is very important to living organisms.
♦ The main source of atmospheric free oxygen is photosynthesis
♦ It is created and used in different ways.
♦ The quantity of oxygen is 20.95% in the atmosphere which is maintained by oxygen cycle.
♦ The oxygen cycle is often interconnected with the carbon cycle because carbon and oxygen are often combined together in a molecule.
➧ 0xygen cycles has four main reservoirs:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
❱ The Atmosphere
❱ The Hydrosphere
❱ The Lithosphere
❱ The Biosphere
➧ How 0xygen produced:-
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[1] Plants create the majority of the oxygen we breathe through a process called photosynthesis.
[2] In this process plants use carbon dioxide, sunlight & water to create energy.
[3] In the process they also create oxygen which they release into the air.
➧ Importance of 0xygen:-
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❱ It helps move oxygen through the three main regions of the Earth.
❱ To break down sugar to produce ATP or adenosine triphosphate.
❱ To help someone who cannot breathe by providing them with oxygen.
_________
Thanks....✊
✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭
┗─━─━─━─━∞◆∞━─━─━─━─┛
0xygen Cycle➫ The process by which oxygen released into the atmosphere by photosynthetic organisms.
♦ Oxygen is an element that is very important to living organisms.
♦ The main source of atmospheric free oxygen is photosynthesis
♦ It is created and used in different ways.
♦ The quantity of oxygen is 20.95% in the atmosphere which is maintained by oxygen cycle.
♦ The oxygen cycle is often interconnected with the carbon cycle because carbon and oxygen are often combined together in a molecule.
➧ 0xygen cycles has four main reservoirs:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
❱ The Atmosphere
❱ The Hydrosphere
❱ The Lithosphere
❱ The Biosphere
➧ How 0xygen produced:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
[1] Plants create the majority of the oxygen we breathe through a process called photosynthesis.
[2] In this process plants use carbon dioxide, sunlight & water to create energy.
[3] In the process they also create oxygen which they release into the air.
➧ Importance of 0xygen:-
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=⤵
❱ It helps move oxygen through the three main regions of the Earth.
❱ To break down sugar to produce ATP or adenosine triphosphate.
❱ To help someone who cannot breathe by providing them with oxygen.
_________
Thanks....✊
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