What is the difference between biological oxygen demand and chemical o – InterviewSolution

InterviewSolution

1.

What is the difference between biological oxygen demand and chemical oxygen demand? What is the effect of a higher biological oxygen demand on the level of dissolved oxygen and sensitive organisms in a water body?

Answer»

S. No.	Biological Oxygen Demand (BOD)	Chemical Oxygen Demand (COD)
(i)	It is the amount of oxygen required for microbial breakdown of organic matter.	It is the amount of oxygen required for oxidation of both biodegradable and non-biodegradable organic matter in the water.
(ii)	Its value is less than COD.	Its value is more than BOD.

Higher biological oxygen demand shows that the dissolved oxygen in water bodies is much reduced and thus aquatic animals will die.

Discussion

No Comment Found

Related InterviewSolutions

Hundred metre surroundings of hospitals and schools are considered as silent zone. Justify it.
What is meant by ozone shield? Name two ozone depleting substances. How do the ozonedepleting substances affect the ozone shield? Write one damaging effects of ozone depletion on humans and plants respectively.
Three-mile Island, Chernobyl incidents are typical example for………pollution(a) Sound(b) Radioactivity(c) Water(d) Physical
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer? (a) Ammonia (b) Methane (c) Nitrous oxide (d) Ozone
Explain the role of lakes in an ecosystem.
What do you mean by Biochar? How it helps the environment?
Process of heating biomass in low oxygen environment is called as ___
What is carbon sequestration?
People’s movement for the protection of environment in Sirsi of Karnataka is ________ (a) Chipko movement (b) Amirtha Devi Bishwas movement (c) Appiko movement (d) None of the above
Write a comparative note on Carbon Foot Print (CFP).