Design for the water supply system, from the Magra Dem, which will supply the delivery points of Atalaia, Boavista, Baleizão, Salvada, Quintos and Cabeça Gorda, in the municipality of Beja.
- WTP (Preliminary design, including the civil construction works, equipment, electrical installations, instrumentation and tele-management)
· designed for the flow of 5 000 m3/day and a capacity to serve 30 000 inhabitants;
· the liquid phase has the following treatment operations: adjusting the calco-carbonic balance by adding CO2 and milk of lime; ozone preoxidation; fast mixing with the addition of milk of lime, powdered activated carbon and coagulant (aluminium chloride, PAX 18); sedimentation in a sludge-blanket clarifier, pulsing, for 100% of the flow rate and flotation with capacity for 100% of the flow rate, preceded by flocculation; Filtration thorough rapid sand filters; intermediate ozonation; filtration through filters with granular activated carbon; final pH adjustment with lime water; and final disinfection with chlorine gas;
· the solid phase treatment includes the following bodies and equipment: equalization tank, water recovery tank, thickener, sludge conditioning and dewatering system;
· treated water tank, made of reinforced concrete and with a capacity of 2,400 m3;
- Pumping stations (located in a dedicated building in the premises of Magra WTP):
· Atalaia Pumping Station, which feeds the supply subsystem from the Atalaia Break pressure tank (BPT), including the installation of three parallel groups for a unit flow of 34,1 L/s, for a total flow 68,3 L/s, and a dynamic head of 90,0 mH2O;
· Baleizão Pumping Station, which feeds the supply subsystem that serves Baleizão reservoir, including the installation of three parallel groups for a unit flow of 5,0 L/s, for a total flow of 10,0 L/s, and a dynamic head of 59,0 mH2O;
· Salvada Pumping Station, which feeds the supply subsystem from the Salvada Reservoir, conveying water by gravity to Cabeça Gorda and Quintos reservoirs, including the installation of two parallel groups for a flow of 3,4 L/s, and a dynamic head of 77,0 mH2O;
- Conduit pipes over a total extension of 38,080 m distributed for:
· C I: Water conveyance to Magra WTP - BPT - Atalaia reservoir, with a diameter of 350 mm, ductile iron, with a length of 10 760 metres, including the Atalaia break pressure tank and a section carried out by using pipe jacking method, and a microtunneling subsystem type;
· C2: Water supply to the Magra WTP - Salvada reservoir, with a diameter of 160 mm, HDPE, and a length of 4 500 metres;
· C3: Water supply from the Salvada reservoir to the Cabeça gorda reservoir, with a diameter of 160 mm, HDPE, and a length of 4 900 metres;
· C4: Water supply from the Salvada by-pass to Quintos reservoir, with a diameter of 75 mm, HDPE, and a length of 5 480 metres;
· C5: Water supply from the WTP to Baleizão reservoir, with a diameter of 110 mm, HDPE, and a length of 12 440 metres, including a section carried out by using pipe jacking method, and a microtunneling subsystem type;
- Reservoirs:
· Atalaia Brake pressure tank, including civil construction works, equipment and electrical installations, instrumentation and tele-management;
· Salvada reservoir, in reinforced concrete and with a capacity of 450 m3, including civil construction works, equipment and electrical installations, instrumentation and tele-management.
· Interconnexion to the Baleizão, Cabeça Gorda, Quintos and Atalaia reservoirs, including civil construction works, equipment and electrical installations, instrumentation and tele-management.
Preliminary Design, Detailed Design and Technical Assistance to Construction Works.
2016 - 2019
Águas Públicas do Alentejo
TPF Consultores