GATE (TF) Textile 2015 Question Paper Solution | GATE/2015/TF/29

Question 29 (Textile Engineering & Fibre Science)

In the context of effluent discharge, BOD means

(A)Bio-oxidative degradation
(B)Bio oxygen distress
(C)Biological oxygen demand
(D)Bacteria observed on disc
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What is a BOD meaning?

BOD stands for Biochemical Oxygen Demand. It is a measure of the amount of oxygen required by microorganisms to break down organic matter in water. BOD is an important parameter used in wastewater treatment and monitoring, as it can indicate the level of organic pollution in water.
The BOD test involves incubating a water sample in a closed container for a specified period of time, typically 5 days, at a constant temperature. During this time, microorganisms in the water will consume oxygen as they break down the organic matter in the sample. The amount of oxygen consumed is then measured and expressed as the BOD value in milligrams of oxygen per liter of water (mg/L).
High BOD levels in water can indicate the presence of pollutants, such as sewage or industrial effluents, that contain high levels of organic matter. These pollutants can deplete the oxygen in the water, which can lead to the death of aquatic organisms and other environmental problems.
By monitoring BOD levels in wastewater and other water sources, it is possible to assess the level of pollution and determine the effectiveness of wastewater treatment processes in removing organic matter before the water is discharged into the environment.

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