Constructed Wetlands for Wastewater Management (Adama, Ethiopia)

Project Details

Overview

The Collective (formerly WASTE COOP) advisors contributed to a the realisation and acceptation of a constructed wetland in the urban zone in Ethiopia

The project focused on transfer of technical knowledge regarding the building a wetland but also worked on discussion around the ownership of the wetland, particularly who is responsible for the monitoring and maintenance of the wetland.

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The Challenge

Quite some condominiums in Adama have trouble with their septic tanks. Especially during rainy season it is not uncommon that the area, around the condominiums are flooded because of the overflowing tanks. A proven solution is creating a constructed wetland that absorbs the outlet water, which is still polluted. The technique is known worldwide, but in Ethiopia it is not yet much practiced in urban settings. This wetland is the second to be realised in Adama.

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Our Approach

With the lead partner Waternet International under the Blue Deal funding, the collective (formlerly, WASTE COOP advisers) were requested to support the local partner, BBBC in the realisation of the wetland, offering technical advise and support during the actual building.

This included:

• Site selection
• Technical expertise (engineering) during the design and the implementation phase,
• Project management support and
• Advising on finances, institutional arrangements and social aspects of the constructed wetlands.

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What We Delivered

The project resulted in a set of practical outputs to support decision-making and future programming:

• 2nd wetland realized in Adama
• Research on the functionality and performance of the wetland constructed earlier during SDG WASH (a WASTE Foundation project)

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Impact & Outcomes

Ownership is taken up by the water utilities. There is a clear interest to continue with these nature based waste water treatment systems. In addition the residents are extremely pleased with the cleaner and greener surroundings as this article explains: https://dutchwaterauthorities.com/news/700-happy-residents-thanks-to-new-wetland-in-adama-ethiopia/

A rather unexpected outcome is also that the grasses mowed from the wetland can be used as fodder for cattle.

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Looking Ahead

While the city is on board, it is clear that some more effort has to be put into the financing opportunities for such infrastructure.