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13th European Forum on Eco-innovation

Water Optimization for Network Efficiency Reducing the Environmental & Water Footprint

of a Major Water Utility

Andrew Donnelly


Water losses within distribution systems are a global problem, butthey must not been seen as inevitable.

Every litre of water lost contributes to the overall environmentalfootprint of the company, through inefficient use of raw waterresources, energy and chemicals.

Reducing water losses is economic and environmental good practice,with EPAL, as a specialist in water distribution, having established itselfas a company with the ability to anticipate and resolve problemsassociated with water losses.

PREFACE


1880

WHERE &WHAT IS EPAL?

From 1868 to 1974 Water supply concession for the City of Lisbon CAL -Water Company of Lisbon

Post-concession from 1974Following the revolution, Public Limited Company formed under the current nameEPAL - Empresa Portuguesa das Águas Livres

Since 1993 EPAL has been integrated in AdP - Águas de Portugal, the state holding group in the water & wastewater sector

EPALOver 140 years of history & experience


today

Bulk Supply to around 2.5 million people in 34 municipalities in and around the Lisbon area

Direct Supply water to 350 000 domestic and commercial customers within the City of Lisbon

With 740 employees, EPAL is the largest water supplier in Portugal with a net profit of €43 M on a turnover of €152M in 2011

Production capacity totals more than1 000 000 m3/day



Production & Supply System with assets over

€600M

2 Water Treatment Plants

710 km Trunk Mains

25 Chlorination Points

41 Pumping Stations

42 Water Tanks

ETA da Asseiceira

OTA

ALENQUER

VALADA TEJO

LEZÍRIAS

ETA de Vale da Pedra

CASTELO DO BODE



City of Lisbon Distribution System

350 000 Clients

550 000 Customers

200 000 m3 Daily Demand

5 Pressure Zones

1 430 km Distribution Mains



0%

5%

10%

15%

20%

25%

30%

0

10

20

30

40

50

60

1993 1994 1995 1996 1997 1998 1999 2000 2001

Mm3

Transport System Distribution Network

Total % NRW Transport System

NON-REVENUE WATER PROBLEM

During the 1990s, annual volume of NRW stabilized around 50 million m3

Water losses predominantly within the distribution network


Tackling water losses combats elevated financial losses and inefficiency,whilst increasing sustainability

Water is a finite resource it is crucial to improve efficiency tomaximise resource utilization

EPAL’s strategic objective is long-term sustainability of water supply,the first step of which is to ensure the overall day-by-day

efficiency and effectiveness

COMPANY POLICY & STRATEGY


Adopted strategy focuses on:

• Segmentation & continuous network monitoring• Development of analysis systems using internal resources • Optimization of Active Leakage Control actions

• Continuous improvement based on experience and results• Simple and effective analysis processes• Focus on what is essential and control costs

Objective: Reduce Non-Revenue Water to sustainable levels in the Lisbondistribution network - less than 15%

COMPANY POLICY & STRATEGY


Macro Leak

Detection

Metering &Telemetry

Leakage Target

Definition

LeakPin-point

Leak Repair & Target Validation

1

2

3 4

5

WATER OPTIMIZATION FOR NETWORK EFFICIENCY


4 PHASES TO REDUCENON-REVENUE WATER

2006

2009

2007

2. Continuous Monitoring

Create metering points & telemetryDesign & boundary validationDMA Implementation

1. DMA planning and set up

Recording of pressure & flowPassive system with active alarms

3. Data Analysis

Integration in analysis softwarePerformance Indicators, Water Balance & RankingSurgical Control of leakage

4. Reporting

DMA Proposals & Reference ManualsDMAAnalysis & Audit Project Reports


DMA IMPLEMENTATION PROJECT IN LISBON

340 networkmetering &

telemetry systemscontinuouslymonitoring

flow & pressure

Monitor around1 250 km

of the network &more than98% of clients

Create 150independent DMAswith an average of2 200 clients &8 km of mains

Flow meter Altimetric Zone Valve (closed) DMA Valve (closed)


IT SUPPORT FOR DATA INTEGRATION

Client Management AquaMatrix

SCADA

Telemetry

GISG/InterAqua

Automatic Meter

Reading

Data integration software

that calculates practical

performance indicators for

management of water

distribution networks


KEY FUNCTIONOF THE IT SUPPORT

DMA Performance Report Table


DMA Total & Nightline Water

Balance



DMA Monitoring Point Analysis



A TOOL WHICH RESPONDSTO THE USER’S NEEDS

Data integration from varying sources into one system

Increase accessibility to essential data

Direct contribution to

NRW reduction in Lisbon

Reduction in meter reading

costs

Easy adaptation for other utilities

Statistical analysis &

system alarms


DMA 1060 CASE STUDY

Office work:• Performance and DMA net volume analysis• Demand and leakage characterisation for large DMA consumers

DMA Analysis Project Methodology:

Daily Flow and Pressure Profile

Flow (m3 /h) Pressure (m

)

m3/hm3/h

%m3/h

Est: 8.60 Meas: 0.00 Tot: 8.60 m3/hm3/hm3/hTarget Night Flow

145.87141.21

124.21 / 190.14 = 812.77

129.8311.38

Value Minimum / Average FlowUnavoidable Losses (UARL)Authorised Night FlowRetrievable Night Flow

Analysis Period; Begining: 26-Set-2008 End: 6-Out-2008 N.º Days: 11DMA Performance

Average Minimum Night Flow for this periodAbsolute Minimum Night Flow In situ work – Lift ‘n’ Shift + Find ‘n’ Fix:

• DMA boundary valve validation• Leakage Detection equipment deployment• Step-Tests and temporary DMA Alterations

• Acoustic Correlation and Ground microphones

• Repair and Validation


DMA 1060 CASE STUDY

Critical Area – old Alcântara roundabout

92m3/h

44m3/h


DMA 1060 CASE STUDY

3978

5

3979

4

3980

3

3981

2

DMA 1060 (m3/h) Large User (m3/h)

Before 13 Dec 2008 Jan 2009 After 22 Mar 2010

Highlights importance:• DMA set-up combined with Active leakage control interventions• Integrating of all telemetry data into analysis

Initial Nightline 160 m3/h

Leakage Reduction 110 m3/hClient Use Reduction 30m3/h

1 million m3/year recovered in a single DMA:• Better demand management• Greater energy efficiency• Lower environmental impact & water footprint• Investment payback measured in weeks!

Water Loss equivalent to 500 000 m3/year


Current savings of around €6M per annum compared with 2005Positive results are obtainable in other countries and other contexts because we

all have the same challenge

NRW IN LISBONREDUCED TO 10%

Mm3

Reduced energyconsumption(4.7 M kWh)

Reducedchemical usage(17.2 ton Cl2)

Savings ofCO2 emissions(1800 ton CO2)

Pro-active Management & Efficiency Improvements = real financial & environmental benefits

Cumulative effect of Network Rehabilitation Project & Active Leakage Control Strategy


BENEFITS

OBTAINABLE

ACTIVEPERFORMANCEMONITORING

ENERGY & WATERCONSERVATION

REDUCEDENVIRONMENTAL

IMPACT

SYSTEMDIAGNOSIS &OPTIMIZATION

COSTEFFECTIVE

SIMPLE&

ADAPTABLE

PROMOTING PROACTIVE MANAGEMENT


COMMITMENT

Combat water losses and wastage in an integrated, proactive and sustainable form.

To be an effective and proactive partner in the water management process, aiming to:

• Anticipate & reduce water losses

• Reduce water and energy footprint

• Enhance planning & reduce costs

• Guarantee increased resilience & resource efficiency


Thank you! Contacts:Av. da Berlim, n.º 15 1800-031 LisboaTel. 218552151Fax 218552164E-mail: [email protected]

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