Question:
In a high rate trickling filter, the problem of ponding can be solved by
In a high rate trickling filter, the problem of ponding can be solved by
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Ponding in trickling filters is mainly due to clogging.
Common remedies are:
• Raking the filter bed.
• Chlorination.
• Proper maintenance of filter media.
• Raking the filter bed.
• Chlorination.
• Proper maintenance of filter media.
Updated On: Jul 23, 2026
- Flooding and raking
- Chlorination and supply of air
- Flooding and supply of air
- Raking and chlorination
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The Correct Option is D
Solution and Explanation
Concept:
Ponding in a trickling filter occurs due to clogging of the filter media by excessive biological growth, suspended solids, and accumulated slime.
The common methods adopted to remove ponding are:
• Raking the filter media.
• Chlorination to control biological growth.
Step 1: Understand the cause of ponding. Ponding results from blockage of the voids between the filter media. This prevents wastewater from flowing freely.
Step 2: Identify the corrective measures. Raking loosens the clogged media, while chlorination reduces excessive slime growth. Hence, \[ \boxed{\text{Ponding is controlled by raking and chlorination}.} \] Therefore, the correct option is \[ \boxed{(D)\;\text{Raking and chlorination}.} \]
• Raking the filter media.
• Chlorination to control biological growth.
Step 1: Understand the cause of ponding. Ponding results from blockage of the voids between the filter media. This prevents wastewater from flowing freely.
Step 2: Identify the corrective measures. Raking loosens the clogged media, while chlorination reduces excessive slime growth. Hence, \[ \boxed{\text{Ponding is controlled by raking and chlorination}.} \] Therefore, the correct option is \[ \boxed{(D)\;\text{Raking and chlorination}.} \]
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