What is a BOD Test?
BOD stands for Biochemical Oxygen Demand. BOD test is mainly done to check the pollution level of a water body. It is a good indicator of the level of pollution found in a water body. If the value of BOD is high, it indicates a high level of infestation of microorganisms in the water. BOD is expressed as milligrams of oxygen/litre of water. For drinking water the value of BOD is 1-3 mg/L. Wastewater treatment plants are used to clean wastewater and sewage. BOD tests help in checking the efficiency of these wastewater plants. The organisms living underwater use the oxygen dissolved in water for their use. BOD aims at calculating the amount of oxygen that is utilised by microorganisms while decomposing organic matter. A high BOD means the water is unhealthy.
What is BOD Test?
The BOD test acts as an important criterion for knowing the health of an ecosystem. The BOD Test of Water is done to know how impure or pure the water body is. The BOD test procedure involves the collection of the water sample in an air-tight container which is then kept in incubation for five days at 20 ℃. The sample of water contains microorganisms that have the function of decomposing organic matter. They utilize oxygen present in the water to do so. BOD measures the amount of oxygen that gets consumed.
Table of Content
- Definition of BOD
- Objectives of BOD Testing
- Principle of BOD Test
- Calculation of BOD
- BOD Test Procedure
- BOD Test Measurement Problems
- Importance of Biochemical Oxygen Demand
- Limitations of the BOD Test
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