The Tunis West Sewerage Project for Tunisia will help achieve the following objectives: (1) Improve the quality of sanitation services in Greater Tunis, and preserve the achievements o f the sector; (2) promote the reuse of treated wastewater in irrigation on a sustainable basis and in significant quantities; and (3) enhance ONAS performance through financial and operational management capacity building. The project combines sewerage and institutional building components. The sewerage component includes building: a) a waste water treatment plant in El Attar in the western part o f Great Tunis. b) a system of mains and pumping stations to transfer raw sewage to the treatment plant; and c) a system of mains to transfer treated sewage to Oued Meliane with valves for connection to irrigation basins; and d) technical assistance for construction supervision. The institutional building component includes: a) strengthening of the National Sewerage Board (ONAS) financial management; b) environmental management of the Project, including mitigation measure for sludge disposal; c) the preparation of strategic technico-economic studies for sanitation; and d) the establishment of a customers management system.
