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Water Recycling

Measuring Bio...

Question

Measuring Biochemical Oxygen Demand (BOD) is a method used for _________________.

A

estimating amount of oxygen in sewage water

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B

estimating amount of organic matter in sewage water

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C

both a and b

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D

none of these

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Solution

The correct option is A estimating amount of oxygen in sewage water
BOD stands for Biological Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic matter present in a given water sample. It is mostly expressed in milligrams of oxygen consumed per litre of sample.

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Q. It is possible to estimate the amount of biodegradable organic matter in sewage water by measuring Biochemical Oxygen Demand (BOD). Can you explain how?

Q. Read the following statements (A-D) related to Biochemical Oxygen Demand (BOD) and identify the correct option stating true (T) and false (F).

A. Biochemical oxygen demand is defined as the amount of dissolved oxygen needed by microorganisms in decomposing the inorganic wastes.
B. Greater the BOD of waste water, the higher is the amount of organic matter present.
C. The BOD increases with time as organic matter gets decomposed.
D. Sewage water is treated till the BOD is reduced

Q. Measuring 'Biochemical Oxygen Demand' (BOD) is a method used for

Q. Assertion (A): There is a sharp decline in the dissolved oxygen (DO) in the area of the water body where the sewage is discharged

Reason (R): Microorganisms involved in the degradation of organic matter in the receiving waterbody consume a lot of oxygen

Q. Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD of less than 5 ppm indicates a water sample to be:

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