Alcântara WWTP

“The Water Factory”

12th.october.2018 Who Are We MULTIMUNICIPAL WASTE WATER SYSTEM – AND WEST LISBON

COVERED AREA: SERVED Inhabitants 4.145 km2 POPULATION: (projetc horizon) 2,4 million

23 MUNICIPALITY SERVED Alcobaça, Alenquer, , , , Bombarral, , Caldas da Rainha, , Lisboa, , Lourinhã, Mafra, Nazaré, Óbidos, , Oeiras, Peniche, Rio Maior, , Sobral de Monte Agraço, e . 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 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!