Alcântara WWTP “The Water Factory” 12th.october.2018 Who Are We MULTIMUNICIPAL WASTE WATER SYSTEM – LISBON AND WEST LISBON COVERED AREA: SERVED Inhabitants 4.145 km2 POPULATION: (projetc horizon) 2,4 million 23 MUNICIPALITY SERVED Alcobaça, Alenquer, Amadora, Arruda dos Vinhos, Azambuja, Bombarral, Cadaval, Caldas da Rainha, Cascais, Lisboa, Loures, Lourinhã, Mafra, Nazaré, Óbidos, Odivelas, Oeiras, Peniche, Rio Maior, Sintra, Sobral de Monte Agraço, Torres Vedras e Vila Franca de Xira. Mission • Explore and manage the multi-municipal wastewater sanitation system of Greater Lisbon and West • Ensure the quality, continuity and efficiency of public water services, in the sense of protecting public health, the well-being of the population, accessibility to public services, environmental protection and economic and financial sustainability • Tariff stability • It also contributes to the regional development • Contribuet to the achievement of the targets set in national e plans and obligations from EU legislation. THE TAGUS ESTUARY: AN ENVIRONMENTAL HI-RELEVANT CASE 6 Grupo Águas de Portugal LISBON WASTE WATER TREATMENT SOLUTION • Region with the highest Multi-municipal Systems: development rate in Portugal; • Regional nature • Urban growth; • Complementary to the municipal systems • An association between central and local • Environmental protection government for the investment of RiverTagus Estuary; • Granting of a concession to a company set Institutional • Relevant investment in the up for the purpose Solution • Prior determination of the economic basis 1980s and 1990s in urban of the concession wastewater collection and • Strict, detailed regulation, the conditions of some WWTP which are established by law • Major weaknesses related to • Holding company – Águas de Portugal – as the low efficiency of the the main shareholder • Participation of the municipalities in the existing urban sub-systems management of the concessionary company LISBON WASTE WATER TREATMENT SOLUTION RESULTS: Increased efficiency in • Professional management terms of operation • Adequate technical solutions • Integrated investment and of the overall solutions Institutional performance Solution • Environmental approach LCD - TP - ALCÂNTARA focused in the Ecosystems 91.000 hab • Promoting social and Protection of the economical sustainability for a Environmental and regional development water reserves THE TAGUS ESTUARY: AN ENVIRONMENTAL HI-RELEVANT CASE - The largest estuary in Western Europe, with 34 hectares; - Vital part of Lisbon, European Capital; - High environmental interest area and biodiversity; - Natural Reserve of the Tagus estuary: Protected area that is the largest wetland in the country and one of the most important in Europe; - Banks with high population density and a significant number of industries; - Area historically affected by highly polluting industrial activities, mainly located in the southern bank of the estuary and with a high environmental liabilities; - Important area, national and international level, which has been the subject of successive plans for their rehabilitation and management. TAGUS ESTUARY: ONE OF THE MOST IMPORTANT NATURAL RESERVE IN EUROPE THE TAGUS ESTUARY: AN ENVIRONMENTAL HI-RELEVANT CASE Global Investment in Infrastructures directly related to the Tagus Estuary: € 770 Million . € 220 / inhabit. Funding sources: European Union; EIB; Own funds Lisboa, Loures, Vila Franca de Xira, Mafra, Amadora, Odivelas, Cascais, Oeiras, Sintra, Arruda dos Vinhos, Alcochete, Barreiro, Moita, Montijo, Palmela, Seixal, Sesimbra e Setúbal 3.7 Millions 18 municipalities inhabitants involved served LISBON WASTE WATER SYSTEM LISBON WASTE WATER TREATMENT SOLUTION: ALCÂNTARA SUBSYSTEM ALCÂNTARA Subsystem ALCÂNTARA WASTE WATER TREATMENT PLANT LOCATION Alcântara WWTP ALCÂNTARA WASTEWATER TREATMENT PLANT • Population served 750,000 inhabitants-equivalent • Flow Max: 3.3 + 3.3 m3 /s • Infrastructures 1 Wastewater treatment plant 13 Pumping stations 26 km of main sewers ALCÂNTARA : SYSTEM CONFIGURATION ALCÂNTARA WWTP EE3 LCD - TP - ALCÂNTARA ALGÉS-ALCÂNTARA EE3 91.000 hab 99.500 hab 4,5 km ALCÂNTARA : LOW AREA SYSTEM CONFIGURATION ALCÂNTARA WWTP CAIS SODRÉ-ALCÂNTARA 47.000 inhab 2,8 km EE3 ALFAMA- ALCÂNTARA ALGÉS-ALCÂNTARA EE3 91.000 inhab 99.500 inhab 4,5 km SYSTEM CONFIGURATION – ALFAMA / CAIS DO SODRÉ 100% Dry Weather (DW) PS Terreiro do Trigo + 2 x DW Peak Flow: 110 l/s First-flush Tide Valves Rua Augusta/Rua Prata 4 x DW Peak Flow : 1615 l/s PS Fluvial 2 x DW Peak Flow : 130 l/s Tide Valves Rua Ouro 4 x DW Peak Flow : 455 l/s PS Agências 2 x DW Peak Flow : 1100 l/s Emissário da EE Agencias Gravitic 2 x DW Peak Flow : 1100 l/s Pressure SYSTEM CONFIGURATION – CAIS DO SODRÉ / ALCANTARA PS Rocha Conde D´Óbidos 2 x QP TS: 1100 l/s PS Santos 2x QP TS: 1100 l/s PS Agencias 4 x QP TS: 2200 l/s TERREIRO DO PAÇO – TIDE & FLOW CONTROL TERREIRO DO PAÇO – TIDE & FLOW CONTROL TERREIRO DO PAÇO – TIDE & FLOW CONTROL ALCÂNTARA SUBSYSTEM INVESTMENT • Global Subsystem investment: 181 M€ • WWTP: 64.4 M€ • EU Funding (Cohesion Fund): 11.0 M€ ALCÂNTARA WWTP Before: After: ALCÂNTARA WWTP ▪ Primary Treatment since 1989 ▪ Advanced Primary Treatment since 2003 ▪ Secondary Treatment since 2009 ▪ Population Served: 750,000 eq.hab ▪ Treated flow: 570,240 m3/day ▪ Load: - BOD5: 99,792 kg O2/day - COD: 285,120 kg O2/day - SS: 114,048 kg/day ALCÂNTARA WWTP ▪ Peak flow (dry weather): 3.3 m3/s ▪ Peak flow (wet weather): 6.6 m3/s (13.2 m3/s) ▪ Plant Objectives: BOD: 25 mg O2/L COD: 125 mg O2/L SS: 35 mg/L E.Coli: 2,000 Un/100 mL (option) ALCÂNTARA WWTP WASTE WATER TREATMENT LINE Wet Weather Line Wastewater Grit+FOG Dry Weather Screening Pumping Removal Line Waste 6.60 m3/s Grit FOG ALCÂNTARA WWTP WASTE WATER TREATMENT LINE Dry Weather Line 3.30 m3/s Grit + FOG Removal 3.30 m3/s 6.60 m3/s Wet Weather Line ALCÂNTARA WWTP DRY WEATHER TREATMENT LINE Grit+FOG MULTIFLOTM Pumping Removal (primary treatment) 3.30 m3/s Sludge Dewatering ALCÂNTARA WWTP – TREATMENT LINE MULTIFLOTM ▪ Primary decantation ▪ Thickenning ▪ 12.8 m3/m2.h ▪ No chemicals (Dry Weather) ▪ Sludge recirculation ▪ Option (iron chloride + flocculant) ALCÂNTARA WWTP DRY WEATHER TREATMENT LINE BIOSTYRTM Pumping UV Disinfection (Biofilter C removal) 3.30 m3/s Sludge Thickenning ALCÂNTARA WWTP – TREATMENT LINE BIOSTYRTM ▪ 15 units ▪ 215 m2/unit ▪ Media depth: 3,8 m ▪ Media size: 3,5 mm ALCÂNTARA WWTP DRY WEATHER TREATMENT LINE UV Disinfection Tagus River Recycled Filtration UV Disinfection Water (Int+Ext) 200 m3/h ALCÂNTARA WWTP WET WEATHER TREATMENT LINE Grit+O&G ® Tagus River Removal ACTIFLO 3.30 m3/s Sludge Thickenning ALCÂNTARA WWTP – TREATMENT LINE ACTIFLOTM ▪ Iron chloride + micro-sand + flocculant ▪ 120 m3/m2.h ▪ 80% SS removal; 60% BOD/COD removal ALCÂNTARA WWTP SLUDGE TREATMENT LINE Dewatering Conditionning Sludge ACTIFLO® (centrifugation) (with lime) Storage Thickenning (MULTIFLOTM BIOSTYRTM ) Sludge Tank Agriculture Composting MULTIFLOTM External Anaerobic Digestion ALCÂNTARA WWTP – TREATMENT LINE ODOR CONTROL 160,000 m3/h Scrubber 4 Scrubber 4 (NaHSO3) (NaHSO3) 50,000 m3/h Scrubber 3 Scrubber 3 (NaOH+NaOCl) (NaOH+NaOCl) Scrubber 2 Scrubber 2 Biofilter (NaOH+NaOCl) (NaOH+NaOCl) Scrubber 1 Scrubber 1 (H2SO4) (H2SO4) All process areas ALCÂNTARA WWTP – TREATMENT LINE ODOR CONTROL - PRINCIPLES Street Exterior covering Building Internal street Treatment To odor treatment ALCÂNTARA WWTP - GREEN ROOF ▪ Thermal insulation of buildings (less electrical consumption) ▪ CO2 fixation ▪ Noise reduction (internal and external) ▪ Rain retention ▪ Landscape integration ALCÂNTARA WWTP - GREEN ROOF LISBON FACING TAGUS ESTUARY THANK YOU! .