Wastewater

The main objective of this assignment is to provide consultancy services for the preparation of the detailed design and construction supervision of the Maputo wastewater drainage system. The design phase will involve three components: (i) design of the Polana (EE1) and UEM (EE2) pumping stations and rising mains; (ii) design of the main trunk sewers (E-MP1); and (iii) design the upgrades and expansion of priority secondary and tertiary network and sewer connections. EE1 was designed for a 111.1 l/s capacity and EE2 for a smaller one, 50 l/s. The value of the total equivalent population served by the E-MP1 was estimated for the year 2040 (420,784 equivalent inhabitants).

The Master Plan consists in the development of the following stages: -Carrying out a comprehensive review and assessment of the existing situation with respect to sanitation and drainage in the city; -Developing a strategy for improving sanitation and drainage services, and analysing and recommending an appropriate institutional framework; -Providing support for consensus building around the strategy and institutional framework; -Preparing an integrated sanitation and drainage master plan to meet demand for services in the year 2035; and -Identifying and preparing detailed engineering designs and tender documents (FIDIC) for priority sewerage investments. The Master Plan also includes: the preparation of the Strategic Environmental and Social Assessment (SESA); Knowledge Transfer and Capacity building (CB); the development of GIS Analysis and Mapping tools; and Topographic and geotechnical surveys to support the detailed engineering designs. The estimated flow is 1736.11 l/s, corresponding to a population equivalent to 1 500 000 inhabitants.

The Barcelos WWTP, which came into operation in 1999, was built to treat domestic and industrial wastewater from the municipality of Barcelos. The facility has a capacity to handle a flow of 274,75 l/s, which corresponds to an equivalent population of 133 250 inhabitants. The aim of the project is to analyse, from a technical and economic point of view, the best treatment alternative for the remodelling of the WWTP, and to develop the corresponding detailed design in order to comply with its discharge license. The project includes three distinct phases of development: Phase 1 - Diagnosis and Baseline Data; Phase 2 - Feasibility Study (Study of Alternative Solutions); Phase 3 - Detailed Design and Technical Assistance.

The Objectives of the Coastal Towns Waste Water Management Study are: -Data Collection and Definition of Design Criteria Setting for all 3 Towns; -Preparation of the Preliminary Design and Feasibility Study for Benguela, Lobito and Baia Farta Towns; -Preparation of the Detailed Design of a sewerage system and wastewater treatment plant for the Benguela and Lobito towns. Preparation of measurements and cost estimates; -To carry out an Environmental and Social Impact Assessment and preparation of the Environmental and Social Management Plans and Resettlement Action Plan in line with the AfDB’s Integrated Safeguards System, and it’s Operational Safeguards for all the three towns; -Knowledge Transfer and Capacity building (Operation and maintenance procedures, Geographic Information System, Hydraulic modelling for drainage).

The developed plan, financed by the Portuguese Carbon Fund, includes the design of policies and strategies for urban sanitation evolution, according to GHG emissions mitigation concerns and adaptation of infrastructures to climate change. The Plan included the definition of an implementation strategy, the capacity building of institutions as well as the development of a WEB platform for information transfer and sharing.