Question

Describe the changes in the concentration of oxygen dissolved in the water downstream from the point of sewage entry

Answer 1

Answer:

The glassy of oxygen liquefied in the water is inversely related to the water temperature. The lesser the temperature, the more oxygen can dissolve in the water. At zero degrees centigrade, the determined or saturation level of dissolved is 14.6 parts per million (ppm) or for every million molecules of water, there are 14.6 molecules of oxygen.  

Average DO = (DO effluent) x (Sewage Flow) + (DO stream) x (Stream Flow)/

   (Sewage Flow) + (Stream Flow)

This is the formula to determine DO Concentration

Answer 2

Changes in the concentration of oxygen:

• As the sewage is thrown into water, the bacteria present in the water acrobatically degrade the sewage. This results in the formation of simpler products.

• But, the oxygen quantity of the water decreases severely .
• This results in the formation of an oxygen deprived water.
• In the concentration is plotted then the concentration of oxygen gradually decreases from the point of sewage entry to downstream where the sewage has been degraded.

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