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The Addis Ababa Water and Sanitation Authority (AAWSA), has begun work on a new sewerage development system, at a cost of more than 100 million birr.
The authority – which is responsible for water supply and sewers in the city – has awarded a contract for the first phase of the project to Berhe Hagos General Constructor, to be completed within two years. Etsegenet Tesfaye, public relations head of AAWSA, said that the first phase of the project will benefit 100,000 households in eastern Addis.
“Kality, part of Saris, Bole Michael, Bole Bulbula and Addis Sefer are the major areas that will be included in the current project,” he told Capital.
The project will also include a waste water treatment plant (stabilization pond) that will be built in Chefe, behind Berta Real Estate in Kality.
The pond, a sub-catchment of Akaky treatment plant, has the capacity to treat more than 12,000 cubic meters of waste every day.
As part of the project, 22km of tube lines will drain waste to the treatment plant.
Etsegenet said more than 10 per cent of the project has been completed.
“The second phase of the project could accommodate 250,000 households in the city,” she said.
AAWSA has also worked on a study on another project – the implementation of a new, modern sewerage system in the city, including the Eastern catchment.
This development will serve 500,000 households and treat 100,000 cubic metres of waste per day.
Addis’s existing sewerage system is only able to serve a small proportion of the city’s households adequately.
The water treatment plant at Kality can treat 7,600 cubic metres of waste per day and the Kotebe treatment plant is only set up to receive sludge from vacuum trucks that empty septic tanks, handling an estimated annual volume of 85,000 cubic metres of waste.
Waste water management in Addis, currently accounts for only 10 per cent of total waste, while the new plant will push this to 50%.
The project will include construction of the refinery plant, installation of 30km of main tube lines and 320km of tributary lines.
These lines will transport waste from Sidist Kilo, Merkato, Kolfe, Haya Hulet, Kazanchis and Bole to the Kality sewerage treatment plant.