Enhancing sustainable water use

Transcription

1 Enhancing sustainable water use Dominique Gâtel Deputy technical director for drinking water Veolia Water

2 Where do we intervene? The Faecal oral contamination route (from WHO, 2012)) Wastewater treatment Water supply Water supply

3 Promoting sustainable water use: Nagpur case Around 3 million inhabitants 1/3 of the city s population in slum areas Intermittent, poor quality, water supply Network leakages : 60%

4 Promoting sustainable water use: Nagpur case Goal: 24/7 safe water supply for all Connecting 1 million slum dwellers to the water supply Connecting 350,000 to 450,000 homes to the network Installing ca. 6,000 to 8,000 water meters/month 2,500 km of network constructed and/or refurbished Setting up customer services that meet the needs of very diverse customers 25 years contract to Orange City Water (OCW) 50% Veolia Water India 50% Vishvaraj Environment Ltd. (infrastructure construction company) 60 million investment (70% Public 30% private)

5 Promoting sustainable water use: Nagpur case Supplying more with the same assets Reduces losses arising from leaks in the old pipes Reduces wastage : open taps, stored household water discarded when new supply comes in Acceptable pricing policies: increasing block tariff Engineering new/adapted relations with customers Water Friends : Explaining good practices in water use with, doctors, teachers, housewives Social Welfare Team that actively engages with citizens at all stages of the project

6 Elsewhere Shanghai Network (2008).. Traceability of water in drinking water networks Instrumentation of networks SCADA: control tower Specific instrumentations & operations to control leakages.other contracts in 40 countries

7 Lost Volume Time

8 Lost Volume Time

9 Initial Diagnostic Lost Volume Available data? methodology necessary tools Time

10 Initial Diagnostic Short Term (1-2 years) Lost Volume Available data? methodology necessary tools Meters verificication Evaluation of non metered volumes Pressure management Installation of surveillance equipements Leak detection improvement Repairs Time

11 Initial Diagnostic Short Term (1-2 years) Mid-term (2-5 Years ) Lost Volume Available data? methodology necessary tools Meters verificication Evaluation of non metered volumes Pressure management Installation of surveillance equipements Leak detection improvement Repairs Metering adaptation Pressure reduction/ modulation District metering on-line accoustic detection Renewal strategy Time

12 Initial Diagnostic Short Term (1-2 years) Mid-term (2-5 Years ) Long-term (> 5 years) Lost Volume Available data? methodology necessary tools Meters verificication Evaluation of non metered volumes Pressure management Installation of surveillance equipements Leak detection improvement Repairs Metering adaptation Pressure reduction/ modulation District metering on-line accoustic detection Renewal strategy Advanced renewal of network elements Time

13 Household waste, industry wastes, city wastes, Oily/Organic/caustic sludges, Hydrocarbon based waste, paints, Cyanide waste, polluted soils, Dyes, Latex, Bitumen s, solvents, processing effluent, Resins, inks, Adhesives, Detergents, Laboratory materials etc. (EU) Legislation derived from WHO etc. MEP Richard Seeber: too many harmful residues from chemical treatment end up in our rivers, lakes & coastal waters, changing the habitat for aquatic creatures & harming our own health (Green Week 2012)

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16 Technologies: Models & pilots Low energy Desalination Water reuse, grey-water reuse, rainwater harvesting, Rethinking land occupation patterns Aquifer recharge More permeable surface, Sustainable Urban Drainage, In particular: Place of agriculture Contractual, social Ex. Suburbs of Paris: Check to families billed by Veolia Eau With annual water charge>3% of income Still managing their water consumption. 16

17 Critical success factors Regulatory - institutional framework paramount Local culture & arrangements, e.g. performance vs. obligation of means Preliminary steps: Choose goals & choice of performance target Suitable indicator(s) Green Growth (see OECD series) Identify meaningful solutions in the local context Pay due attention to sociology & social expectations/constraints Decision support means /tools help - Not a strategy per se Then : Debate issues & solutions with stakeholders Contract with involved parties

18 Sustainable water use for us Service Start from local institutional & governance arrangements Make international & local/specific standards effective Employ & enhance local skills through targeted training Strike a balance between CAPEX & OPEX for long term results Value Improve network performance Optimize use of natural /local resources relative but not absolute decoupling Recover energy & materials from sludge or wastes Responsibility Meet the needs to the poorest Record & communicate data