NEET
- Exam
- NEET
- Subject
- Zoology
- Chapter
- Microbes in Human Welfare
NEET · Zoology · Microbes in Human Welfare
These microbes consume the major part of the organic matter in the...
These microbes consume the major part of the organic matter in the effluent, significantly reducing the BOD of the effluent.
Options
- AA measure of the rate of uptake of oxygen by micro-organisms in a sample of water
- BA measure of the organic matter present in the water
- CA measure of the pollution potential of waste water
- DA measure of the physical removal of particles
Correct answer
A. A measure of the rate of uptake of oxygen by micro-organisms in a sample of water
Step-by-step solution
BOD (Biochemical oxygen demand) refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water. The greater the BOD of waste water, more is its polluting potential.