Question
Download Solution PDFWhich of the following statements represent(s) advantages of the separate system of sewerage?
Statement I: The load on treatment units becomes less.
Statement II: Sewers are large in diameter.
Statement III: Maintenance costs are reasonable.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Separate System:
- Dual Sewers: Two sets of sewers are required—one for carrying sanitary sewage and another for stormwater.
- Treatment Load: The quantity of sewage that requires treatment is less since stormwater is not treated in this system.
- Suitability: This system is particularly useful in areas with high rainfall.
Combined System:
- Single Sewer: Only one set of sewers is laid, which carries both sanitary sewage and stormwater.
- Applicability: This system is suitable for narrow streets, where space for multiple sewer lines is limited.
- Maintenance Costs: The maintenance costs are generally lower because of the combined flow, which also helps in the automatic flushing of the sewers.
- Sewer Shape: Egg-shaped sewers are commonly used in combined sewer systems.
- Construction Costs: The overall construction costs are higher compared to separate sewer systems due to the larger size of the combined sewers needed to handle both types of flow.
Last updated on May 28, 2025
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