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In which one of the following tests is the organic matter in the waste water used as food by microorganisms?
- a)BOD
- b)Most probable number
- c)COD
- d)Chlorine demand
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
In which one of the following tests is the organic matter in the waste...
The test in which the organic matter in the wastewater is used as food by microorganisms is the Biochemical Oxygen Demand (BOD) test.
The BOD test measures the amount of oxygen required by microorganisms to break down the organic matter in the water. The test involves measuring the dissolved oxygen in a sample of water at the start of the test (initial DO) and then again at the end of a 5-day incubation period. The difference between the two values is known as the BOD5 and it is used to indicate the degree of organic pollution present in the water. A higher BOD5 value indicates more organic matter present in water and thus more oxygen consumed.
COD test (Chemical Oxygen Demand) test also measures oxygen demand of the water, but it measures the amount of oxygen required by all oxidizing agents, both naturally occurring and those added, not just by the microorganisms.
The Most Probable Number (MPN) test, is a microbiological method used to estimate the number of viable microorganisms present in a sample of water.
Chlorine Demand is not a test which has any relation with organic matter, it measures the amount of chlorine required to neutralize all the oxidizable matter present in the water, it also helps to determine the chlorine dosage to be used for disinfection.
Most Upvoted Answer
In which one of the following tests is the organic matter in the waste...
BOD (Biochemical Oxygen Demand) Test:
The BOD test is used to determine the amount of organic matter present in the wastewater. In this test, the organic matter in the wastewater is used as food by microorganisms. The BOD test measures the amount of oxygen consumed by microorganisms while they are decomposing the organic matter in the wastewater. The test is conducted over a period of 5 days, during which the sample is kept at a constant temperature of 20°C.
The BOD test is an important parameter in determining the quality of wastewater, as it provides an indication of the amount of biodegradable organic matter present in the water. A high BOD value indicates a high amount of organic matter present in the water, which can lead to the depletion of oxygen levels in the receiving water body, resulting in a negative impact on aquatic life.
Conclusion:
Hence, option 'A' is the correct answer, as the BOD test is the one in which the organic matter in the wastewater is used as food by microorganisms to determine the amount of organic matter present in the water.
The BOD test is used to determine the amount of organic matter present in the wastewater. In this test, the organic matter in the wastewater is used as food by microorganisms. The BOD test measures the amount of oxygen consumed by microorganisms while they are decomposing the organic matter in the wastewater. The test is conducted over a period of 5 days, during which the sample is kept at a constant temperature of 20°C.
The BOD test is an important parameter in determining the quality of wastewater, as it provides an indication of the amount of biodegradable organic matter present in the water. A high BOD value indicates a high amount of organic matter present in the water, which can lead to the depletion of oxygen levels in the receiving water body, resulting in a negative impact on aquatic life.
Conclusion:
Hence, option 'A' is the correct answer, as the BOD test is the one in which the organic matter in the wastewater is used as food by microorganisms to determine the amount of organic matter present in the water.
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In which one of the following tests is the organic matter in the waste water used as food by microorganisms?a)BODb)Most probable numberc)CODd)Chlorine demandCorrect answer is option 'A'. Can you explain this answer?
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