Alcântara WWTP The Water Factory

Transcription

1 Alcântara WWTP The Water Factory 12th.october.2018

2 Who Are We

3 MULTIMUNICIPAL WASTE WATER SYSTEM LISBON AND WEST LISBON COVERED AREA: SERVED km 2 POPULATION: 2,4 million Inhabitants (projetc horizon) 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.

4 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.

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6 THE TAGUS ESTUARY: AN ENVIRONMENTAL HI-RELEVANT CASE 6 Grupo Águas de Portugal

7 LISBON WASTE WATER TREATMENT SOLUTION Region with the highest development rate in Portugal; Urban growth; Environmental protection of River Tagus Estuary; Relevant investment in the 1980s and 1990s in urban wastewater collection and some WWTP Major weaknesses related to the low efficiency of the existing urban sub-systems Institutional Solution Multi-municipal Systems: Regional nature Complementary to the municipal systems An association between central and local government for the investment Granting of a concession to a company set up for the purpose Prior determination of the economic basis of the concession Strict, detailed regulation, the conditions of which are established by law Holding company Águas de Portugal as the main shareholder Participation of the municipalities in the management of the concessionary company

8 LISBON WASTE WATER TREATMENT SOLUTION RESULTS: Professional management Adequate technical solutions Integrated investment solutions Environmental approach focused in the Ecosystems Promoting social and economical sustainability for a regional development Institutional Solution Increased efficiency in terms of operation and of the overall performance LCD - TP - ALCÂNTARA hab Protection of the Environmental and water reserves

9 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.

10 TAGUS ESTUARY: ONE OF THE MOST IMPORTANT NATURAL RESERVE IN EUROPE

11 Global Investment in Infrastructures directly related to the Tagus Estuary: 770 Million. 220 / inhabit. Funding sources: European Union; EIB; Own funds THE TAGUS ESTUARY: AN ENVIRONMENTAL HI-RELEVANT CASE Lisboa, Loures, Vila Franca de Xira, Mafra, Amadora, Odivelas, Cascais, Oeiras, Sintra, Arruda dos Vinhos, Alcochete, Barreiro, Moita, Montijo, Palmela, Seixal, Sesimbra e Setúbal 18 municipalities involved 3.7 Millions inhabitants served

12 LISBON WASTE WATER SYSTEM

13 LISBON WASTE WATER TREATMENT SOLUTION: ALCÂNTARA SUBSYSTEM ALCÂNTARA Subsystem

14 ALCÂNTARA WASTE WATER TREATMENT PLANT LOCATION Alcântara WWTP

15 ALCÂNTARA WASTEWATER TREATMENT PLANT Population served 750,000 inhabitants-equivalent Flow Max: m3 /s Infrastructures 1 Wastewater treatment plant 13 Pumping stations 26 km of main sewers

16 ALCÂNTARA : SYSTEM CONFIGURATION ALCÂNTARA WWTP ALGÉS-ALCÂNTARA hab 4,5 km EE3 EE3 LCD - TP - ALCÂNTARA hab

17 ALCÂNTARA : LOW AREA SYSTEM CONFIGURATION ALCÂNTARA WWTP ALGÉS-ALCÂNTARA inhab 4,5 km EE3 EE3 CAIS SODRÉ-ALCÂNTARA inhab 2,8 km ALFAMA- ALCÂNTARA inhab

18 SYSTEM CONFIGURATION ALFAMA / CAIS DO SODRÉ 100% Dry Weather (DW) + First-flush Tide Valves Rua Ouro 4 x DW Peak Flow : 455 l/s Tide Valves Rua Augusta/Rua Prata 4 x DW Peak Flow : 1615 l/s PS Terreiro do Trigo 2 x DW Peak Flow: 110 l/s PS Fluvial 2 x DW Peak Flow : 130 l/s PS Agências 2 x DW Peak Flow : 1100 l/s Emissário da EE Agencias 2 x DW Peak Flow : 1100 l/s Gravitic Pressure

19 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

20 TERREIRO DO PAÇO TIDE & FLOW CONTROL

21 TERREIRO DO PAÇO TIDE & FLOW CONTROL

22 TERREIRO DO PAÇO TIDE & FLOW CONTROL

23 ALCÂNTARA SUBSYSTEM INVESTMENT Global Subsystem investment: 181 M WWTP: 64.4 M EU Funding (Cohesion Fund): 11.0 M

24 ALCÂNTARA WWTP Before: After:

25 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

26 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)

27 ALCÂNTARA WWTP WASTE WATER TREATMENT LINE Wet Weather Line Wastewater Screening Pumping Grit+FOG Removal Dry Weather Line Waste 6.60 m 3 /s Grit FOG

28 ALCÂNTARA WWTP WASTE WATER TREATMENT LINE Dry Weather Line 3.30 m 3 /s Grit + FOG Removal 3.30 m 3 /s 6.60 m 3 /s Wet Weather Line

29 ALCÂNTARA WWTP DRY WEATHER TREATMENT LINE Grit+FOG Removal MULTIFLO TM (primary treatment) Pumping 3.30 m 3 /s Sludge Dewatering

30 ALCÂNTARA WWTP TREATMENT LINE MULTIFLO TM Primary decantation Thickenning 12.8 m3/m2.h No chemicals (Dry Weather) Sludge recirculation Option (iron chloride + flocculant)

31 ALCÂNTARA WWTP DRY WEATHER TREATMENT LINE Pumping BIOSTYR TM (Biofilter C removal) UV Disinfection 3.30 m 3 /s Sludge Thickenning

32 ALCÂNTARA WWTP TREATMENT LINE BIOSTYR TM 15 units 215 m2/unit Media depth: 3,8 m Media size: 3,5 mm

33 ALCÂNTARA WWTP DRY WEATHER TREATMENT LINE UV Disinfection Tagus River Filtration UV Disinfection Recycled Water (Int+Ext) 200 m 3 /h

34 ALCÂNTARA WWTP WET WEATHER TREATMENT LINE Grit+O&G Removal ACTIFLO Tagus River 3.30 m 3 /s Sludge Thickenning

35 Iron chloride + micro-sand + flocculant 120 m3/m2.h 80% SS removal; 60% BOD/COD removal ALCÂNTARA WWTP TREATMENT LINE ACTIFLO TM

36 ALCÂNTARA WWTP SLUDGE TREATMENT LINE ACTIFLO BIOSTYR TM Thickenning (MULTIFLO TM ) Sludge Tank Dewatering (centrifugation) Conditionning (with lime) Sludge Storage Agriculture Composting MULTIFLO TM External Anaerobic Digestion

37 ALCÂNTARA WWTP TREATMENT LINE ODOR CONTROL 160,000 m 3 /h Scrubber 4 (NaHSO 3 ) Scrubber 3 (NaOH+NaOCl) Scrubber 4 (NaHSO 3 ) Scrubber 3 (NaOH+NaOCl) 50,000 m 3 /h Scrubber 2 (NaOH+NaOCl) Scrubber 1 (H 2 SO 4 ) Scrubber 2 (NaOH+NaOCl) Scrubber 1 (H 2 SO 4 ) Biofilter All process areas

38 ALCÂNTARA WWTP TREATMENT LINE ODOR CONTROL - PRINCIPLES Street Exterior covering Building Internal street Treatment To odor treatment

39 ALCÂNTARA WWTP - GREEN ROOF Thermal insulation of buildings (less electrical consumption) CO 2 fixation Noise reduction (internal and external) Rain retention Landscape integration

40 ALCÂNTARA WWTP - GREEN ROOF

41 THANK YOU! LISBON FACING TAGUS ESTUARY

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