Case Study for Small Bore Sewer System

Eng. Peter J. Magambo's Avatar

Eng. Peter J. Magambo

12 Aug, 2011 10:02 AM

Above are my contacts. I am the Managing Director of Kagga & Partners Ltd a Consulting Engineering firm in Uganda. We have an assignment with the Government of Uganda to carry out a feasibility study and design of a pilot small bore sewer system for two upcoming towns in Uganda. My inquiry is about reference for good case study for a small bore sewer system. We are interested in the information and possible visit to the project where it has worked.

We shall be grateful to receive answer back to this inquiry.

Best regards,


  1. 1 Posted by Beth Whiteside on 15 Aug, 2011 06:43 PM

    Beth Whiteside's Avatar

    Hello, Peter.
    You may find some case-related information in the Sanitation portal of the Akvopedia.

    You might also look through the Projects area on the Akvo web site. In your case, you would first go to Focus Areas, then choose "Browse water and sanitation projects." Or you can click here.

    There are 193 projects there at the moment to look through. Our search capability currently can search project names and subtitles; we hope to soon extend to searching descriptions.

    Anyone else have a recommendation?


  2. Beth Whiteside closed this discussion on 15 Aug, 2011 06:43 PM.

  3. Beth Whiteside re-opened this discussion on 15 Aug, 2011 06:44 PM

  4. 2 Posted by hky4l on 24 Aug, 2011 08:49 PM

    hky4l's Avatar

    Hello Eng. Magambo,

    I tried to upload a comment earlier, but it didn't seem to upload, so if you see this twice, apologies.

    As you progress in your research about Small Bore Sewers, is that you will see two distinctly different kinds. The first kind is from the 1980's, implemented as pilot projects around South Africa, Australia, and South America. These were very basic "simple sewers" that had a septic or holding tank, connected to a small diameter sewer. These had to have frequent pumping, and they used PVC piping which was prone to crack, and result in blockages.

    The next set of projects you will find were implemented by a company in Canada called Clearford Industries, who hold most of the major patents on the technology, and seem to have created a "new and improved" system. They started with a pilot in 1989 and have installed a bunch of them around Canada after that. They have made 3 significant changes:
    1) they say they have found a way to accelerate the anaerobic digestion, which would reduce or eliminate the need to pump out tanks, also eliminates the potential for blockages within the pipes
    2) they say they have an attenuation device that stores the liquid for 24-48 hours, which reduces the peaking factor from 3 to 1.2 (this means that all downstream infrastructure can be more than 50% reduced!)
    3) they use flexible HDPE pipe which is extremely durable and not likely to be damaged, or cause any type of blockages

    I found a video on youtube, that is a news report on Clearfords' system:

    I have attached a report based on the 1980's system, and then one of the documents from clearfords website.

    Good luck in your research!


  5. Support Staff 3 Posted by Mark Westra on 07 Sep, 2011 12:58 PM

    Mark Westra's Avatar

    Dear Mr. Magambo,

    You might have already found the Akvopedia article, which has a list of references attached.

    In the Netherlands, it might be useful to connect with WASTE (, advisers on urban environment and development with a focus on sanitation. A good person to contact is Niels Lenderink, at nlenderink[at] They might be able to provide more information.

    best regards,

    mark westra

    Mark Tiele Westra
    Editor Akvopedia - Akvo Foundation
    's Gravenhekje 1A, 1011 TG Amsterdam Tel. 31 (0) 20 820 01 75
    Mob. 31 (0) 6 48492710

  6. Mark Westra closed this discussion on 07 Sep, 2011 12:58 PM.

  7. Mark Westra re-opened this discussion on 07 Sep, 2011 01:00 PM

  8. Mark Westra closed this discussion on 22 Mar, 2012 08:26 AM.

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