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10 Difference Between Combined and Separate Sewer System

Posted on 9th July 201828th June 2022 By Malay Sautya

10 Difference Between Combined and Separate Sewer System

Following are the 10 difference or comparison between combined and separated sewer system:

Combined Sewer System SL
NO
Separate Sewer System
In this system, only one set of the sewer is laid and carries both sewage and stormwater. 1In this system, two sets of sewers are laid for carrying sewage and stormwater separately.
The cleaning of sewers is easy as they are of large in size. 2The cleaning of sewers is difficult as they are of small in size.
The maintenance cost is less.3The maintenance cost is high.
The load on the treatment plant becomes high.4The load on the treatment plant is less.
Self-cleaning velocity is easily achieved.5The self-cleaning velocity is not easily achieved.
Strength of sewage is less. 6Strength of sewage is more.
This system proves to be uneconomical when pumping is required for the lifting of sewage.
7This system proves to be economical when pumping is required for the lifting of sewage.
The stormwater is unnecessarily polluted.8The stormwater is not unnecessarily polluted.
The initial cost is less.
9The initial cost is more as compared to the combined sewer system.
This system is suitable when the rainfall is small and evenly spread throughout the year.
10This system is suitable when the rainfall is uneven or it is heavy for a short duration.

Read More:

 Types Of Sewer

Choice of The Separate Sewer System

Partially Separate Sewer System And Their Advantages & Disadvantages

WasteWater Tags:WasteWater

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