Piloting the world’s first simplified sewerage and biogas system - a community-centred sanitation and clean energy solution.


WASH Project


Our Work


As of this summer (2018), investigation has begun into the design of the new biodigester pilot, and the Biogas team are also preparing to decommission the old model. The Biogas team have visited an existing biogas site and are currently consulting with WaSH Project alumni, as well as local firms with expertise in biogas, to gain as much knowledge as possible about biodigesters.

Monitoring and evaluation

For summer 2018 monitoring and evaluation team is working on monitoring and evaluating the existing network root especially root six (6) that was constructed last summer. Also the M&E team is working hand in hand with a biogas team in decommissioning the current flexigester and looking forward to have a new biodigester installed this summer. The team is also running questionnaires related to biogas cost  in different communities so as to help biogas come up with best business model at the end of summer.

Network construction

In this summer (2018) the team will not be connecting the new sewerage root has it was done in last sessions, instead the team will be joining new members to existing roots. These are people that have latrines near the roots but at first were not connected to the sewerage roots due to difference reasons. Currently, the team has identified the members to be joined on roots and they will be soon carrying out elevation measurement so as to allow construction of new latrines.

Community engagement

This is team is working close with all sub-teams.  The team is currently running questionnaires and focus group discussion with simplified sewerage network.

Why do we do what we do?

Over 80% of residents of Dar es Salaam live in low-income, high-density settlements without adequate sanitation. Existing waste disposal methods are prohibitively expensive for nearly all residents: as a result, raw sewage spills on the streets and brings a range of implications affecting the health, environment and dignity of residents. Our project aims to address the sanitation crisis in Dar and enable residents to take control of their health.


Our Impact

The Biogas team was established in order to utilise the existing simplified sewerage networks to produce a sustainable fuel (biogas), with the hope that money made from selling biogas back to local community could be used to drive the construction of further sewerage networks. The sewage can be converted into biogas through spending time in a large container known as a biodigester.

The WaSH project piloted their first biodigester in the summer of 2015, with successful biogas production being achieved the following year. However, following a series of complications resulting from the inadequate design of this pilot model, the decision was finally made in 2017 that the initial pilot should be decommissioned, and a new design sought in its place.

The Biogas team have learnt a number of valuable lessons from their work so far which will provide good experience as they move forward into designing their second pilot.


Our Vision

Our vision is to  provide a local community (Vingunguti) with quite good and sustainable sanitation system. This will be achieved by connecting residents to a simplified sewerage network that has been running for several years now. Also kite WaSH project aims at production of biogas from the generated sewage. The produced biogas will be sold back to the community. Through biogas production the organization aims to provide the community with sustainable energy source that is environmental friendly and help community get rid of charcoal and firewood that have been used for years.

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— Dickson Flipaywa


During the summer period this year, the WaSH Project intends to construct 20 more latrines in Vingunguti - this would impact approximately 200 people directly. This construction will not only provide these people with access to safe and affordable sanitation but will also begin a handover process that allows future partners to engage and learn from this construction phase.

We will also begin working on a project for the strategic delivery of low-cost clean water filters in communities and households with Blue Tap. The aim is to conduct on-the-ground research through our community links on topics ranging from microfinance and women's groups to the daily water routines of various parties, such that a feasible delivery plan can be conceived.