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In oxidation pond , once BOD from the se...

In oxidation pond , once BOD from the sewage is reduced significantly, the 'flocs' are allowed to sediment and it is known as :

A

Activated sludge

B

Inactivated sludge

C

Primary sludge

D

Secondary sludge

Text Solution

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The correct Answer is:
To solve the question regarding what the sedimentation of 'flocs' in an oxidation pond is known as, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Context**: - In an oxidation pond, sewage undergoes treatment where the Biological Oxygen Demand (BOD) is significantly reduced. This process involves the breakdown of organic matter by microorganisms. 2. **Definition of Flocs**: - Flocs are aggregates of bacteria and other microorganisms that form during the treatment process. They play a crucial role in the sedimentation process by helping to settle out suspended solids from the sewage. 3. **Sedimentation Process**: - Once the BOD is reduced, the flocs are allowed to settle out of the water. This process is essential for separating the treated water from the solid waste. 4. **Identifying the Correct Term**: - The sedimentation of flocs in an oxidation pond is known as "activated sludge." This term refers to the mixture of microorganisms and organic matter that has been aerated and is actively involved in the treatment process. 5. **Conclusion**: - Therefore, the correct answer to the question is that the sedimentation of flocs in an oxidation pond is known as "activated sludge."
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