Looking for advantages and disadvantages of sewerage system? Then you came to the right place.

At the point when the system of sewers is laid separately to convey residential and mechanical sewage in one lot of sewers and the tempest water in another arrangement of sewers, it is called a separate system. 

At the point when one lot of sewers given to convey local and mechanical sewage is likewise permitted to convey a bit of tempest water is conveyed in a separate arrangement of sewers, this system is called a partially separate system. 

It is supposed to be a combined system of sewerage when just one lot of sewers is laid to convey both the household and modern sewage and furthermore the tempest water. The combined system is utilized in zones which have a little precipitation and that too dispersed equally consistently. In such places self cleaning speed will be accessible nearly in all the areas. This system is likewise utilized in the towns where the amount of the sewage is little. 

In the regions where there is overwhelming precipitation during the stormy season, it is fitting to give the separate system in light of the fact that oneself cleaning speed will not be accessible for the majority of the time of the year. 

Sewerage is the system by which sewage is conveyed. It might be characterized into the accompanying three sorts: 

Here are advantages and disadvantages of different types sewerage system:

1. Separate System 

Merits and Demerits of separate system are as per the following: 

Advantages of Separate System

  • As two separate sewers are given to convey sewage and tempest water, the amount of sewage to be treated at treatment plants is little because of which structure of treatment works can be made conservative. 
  • The separate system is commonly less expensive because of the way that solitary clean sewage is required to be taken in shut sewer. The tempest water can be taken in open channels which are built with considerably less expense. 
  • There is no dread of stream contamination in the separate system. 
  • On the off chance that solitary the sewage is to be siphoned during removal, this system is less expensive. 

Disadvantages of Separate Sewerage System

  • As separate arrangement of sewers is laid for sewage and tempest water, along these lines its upkeep cost is more. 
  • Because of the little amount of sewage in the sewer, it is hard to make it self clean. Subsequently flushing of sewer is required for its cleaning. 
  • There is consistently a chance of tempest water to get blended in with sewage sewer which may cause flooding of sewer and making overwhelming burden on the treatment plant. 
  • The two sewers laid in a path may make an incredible burden to general society at the hour of its upkeep. 

2. Partially Separate System 

Merits and Demerits of the partially separate system: 


  • It is an improved tempest of separate systems. The size of sewer can be planned according to necessities and monetarily. 
  • Crafted by house plumbing is decreased in light of the fact that downpour water from rooftops, sullage from restrooms and kitchen is permitted to blend in with sewage in a similar sewer which conveys the release from water closes however the water from every other spot can be taken in separate sewer or channel. 
  • As the little bit of tempest water is taken in a similar sewer which conveys sewage because of which self cleaning speed is obtained and subsequently no flushing of the sewer is required. 


  • As the segment of tempest water is taken with the sewage, accordingly the expense of siphoning is expanded to a separate system. 
  • In dry climates, there is a likelihood that self cleaning speed may not be created in the sewer. 
  • The chance of flood is likewise not precluded in a partially separate system. 

3. Combined System 

Merits and Demerits of combined system: 


  • In the combined system self cleaning speed is effectively accessible at all spots in the sewer. So there is no need of flushing the sewer. 
  • The sewer is weakened by downpour water because of which it very well may be dealt with effectively and financially. 
  • House plumbing can be effortlessly done on the grounds that just one voice is required to be laid. 
  • In blocked zones, it is anything but difficult to lay one huge sewer than two separate sewers. 


  • Combined system has a high introductory expense. 
  • As the amount of sewage is expanded for this situation, subsequently siphoning of it isn’t practical. 
  • The regions which have a precipitation for the littler time of the year, the combined system isn’t reasonable at such places since it will not be conceivable to create self cleaning speed during dry climate as the stream will be little which will bring about silting of the sewer and subsequently flushing of the sewer will be essential. 
  • During the time of substantial downpours, the flooding of sewers may jeopardize the general wellbeing.

If you have any question regarding Advantages and Disadvantages of Sewerage System? Then feel free to ask.