How to deliver water efficiency in 21st Century drought conditions Dr Piers Clark, Commercial Director, Thames Water 1 Societal Challenges 2 From Water Resources Strategy for England and Wales , Environment Agency March 2009 3 4 5 Thames Water – Overview Thames Water - Water Region Other Water Company Region some statistics … Grimsbury 98 water treatment works Banbury Stevenage Oxford Area Boreholes 32,000 km of mains Cirencester 2,600 million litres supplied daily (2,000 Mld in London) Swindon Swinford Farmoor R. Lee Oxford Reading/Chilterns Area Boreholes mes R. Tha Swindon Area Boreholes BECC Hornsey Coppermills London es R. Tham net R. Ken 500,000 water quality analyses per year Bishop's Stortford Luton R. Colne 8.5 million customers ell herw R. C Ashford Common Reading Fobney Kempton Park Newbury Hampton LWCC South London Boreholes Walton Basingstoke 80,000 streetworks activities R ey .W Shalford Guildford Guildford Area Boreholes 6 Understanding what is important to our customers..... “I don’t want to be flooded” “I expect water when I need it” “I understand I need to conserve water in times of drought, but I expect my water company to do its bit” “I am fed up with my road being dug up” “Why are you not replacing the pipes in my street?” “I am willing to pay extra to have lower leakage” 7 BUSINESS CUSTOMER INSIGHT FIRST AND FOREMOST, GET THE BASICS RIGHT Customer Research shows that the primary service factors fro commercial customers are: Bills are regular and accurate – no estimated reads Payment issues or queries are resolved quickly and efficiently Single point of contact for Key Account Customers In Thames Water we have 200,000 Business Customers generating a turnover of £360m 20,000 large customers (>5ML/year) worth ca £200m 8 BUSINESS CUSTOMERS WANT MORE FROM THEIR WATER AND WASTE WATER SUPPLIERS.... Key Customer Segments Resource Development (Boreholes) Ebilling/Invoicing Real-Time Metering Tariff Optimisation Wastewater Removal /Waste to energy Consolidated Billing Trade Effluent Standards Bill Validation and checking Water Quality Event Resilience Invoice Management Resource Management Industrial Resource Optimisation Water Efficiency Audits Commercial Leak Detection and Repair Grey Water Recycling (Non-potable water) Rainwater Harvesting Process Optimisation Public ….We are working with customers to reduce water and waste costs and improve sustainability performance with innovative and tailored solutions provided through a range of partnerships…. 11 Thames Water and Water Reuse The Millennium Dome BedZED Wastewater Reclamation Plan Deephams Effluent Reuse Pilot Plant Olympic Park Blackwater Treatment Plant 12 CONSERVING A VALUABLE RESOURCE Reclaiming used water (sewage) for subsequent use Indirect Potable Reuse (municipal scale) – Blending reclaimed water into a natural water source to be used for potable water after further treatment Non – Potable Reuse (community scale) – Using reclaimed water for toilet flushing and irrigation 13 Water Treatment Works River Town Wastewater Treatment Works Unplanned Reuse Water Treatment Works Town Wastewater Treatment Works Sea 14 14 Water Treatment Works River Town Wastewater Treatment Works Planned Reuse Water Treatment Works Advanced Treatment Works Wastewater Treatment Works Town Sea 15 15 Indirect Potable Reuse - Deephams 0.6 MLD pilot plant trialling stateof-the art technology in IPR Multi-barrier approach C h lo ra m in e F in a l e fflu e n t 3 d o sin g o p tio n s R e je ct P re filte r W aste MF RO H 20 2 UV H 20 2 W aste UV AOP D e g a s s in g & p H c o rre c tio n AOP 16 Indirect Potable Reuse Associated Studies Water Quality studies (assessing hazards in the sewage catchment – Water Safety Plan approach) Health and Environmental studies (fish biomonitoring, Aquifer Storage Recharge, etc) Public Perception Customer Support for IPR (Internet Survey 1) Public perception studies and stakeholder engagement Completely Against 3% Generally Against 9% Neutral 27% Completely Support 14% Generally Support 47% N=2000 17 Non-Potable Reuse BedZED Wastewater Reclamation Plant UK’s first community scale urban reuse plant High profile development (120 dwellings), located in South London Reclaimed water used for toilet flushing 25 m3/d Membrane BioReactor (MBR) plant MBR installed by TW to replace existing failing system 18 Olympic Park – Old Ford Water Recycling Treatment Plant Aim: – To reclaim treated wastewater effluent for non-potable, secondary use – distributed to the Olympic Park via a separate dedicated non-potable network – toilet flushing, irrigation, energy centre cooling and water features Why? – Water scarcity – Sustainability – helping the ODA meet and exceed their 40% water efficiency target (570,000 litres/day of potable water saved) Activities involved: – Design, construction & commissioning, operation – Liaison with stakeholders (OFWAT, EA, DWI, HPA, ODA) – Advice to end users – Metering, Water Balance, Billing 19 20 21 22 23 24 Treatment plant - schematic Membrane bioreactor Biological treatment Membrane separation step P removal dosing potable back-up Northern Outfall Sewer (Greenway) tank Pre-treatment: - 2 Pumping stations - 2 septic tanks 3mm x2 e screen Post-Treatment: Membran - GAC: Granular activated carbon filtration bioreactor - Cl2: Chlorination Pre-treatment septic tanks (x2) 1 mm screens (x2) Reclaimed water distribution system x2 Post-treatment Granular activated carbon (x2) Chlorination DRAFT REPRESENTATION 25 The delivered article - January 2012 26 Inside – membrane separation to the left and odour treatment to the right 27 Olympic Park Economics 28 Site Specific Economics 29 Olympic Park distribution network 3.6 Km Eton Manor Velo Park Media centre Handball Energy Sewer flush Athletes village Irrigation x4 Stadium 30 Overview schematic from Reclaimed Water Safety Plan X ? x4 X DRAFT as of 4/11/11 31 Not all solutions are high tech…. Green roofs partnership – Drain London, Museum of London and University of East London In London, only 14 of a possible 2,500 hectares of flat roof are currently covered by vegetation… 32 London 1874 and Today 33 SuDS measures An example ‘green street’ from Portland Oregon, USA Typical street in Hammersmith 19/07/2012 34 SuDS measures 19/07/2012 35 Retrofit pilot trials - opportunistic Museums Commercial property block managed by SKE South Ken tube station 19/07/2012 36 Retrofit pilot trials - opportunistic planter boxes here minor works water butts here 2-3 rain gauges sited on roof and neighbouring flat roofs Monitor volume in and out of storages 19/07/2012 37 Summary TW is internationally recognised as the UK’s leading Urban Water Reuse company Siemens are a global leader in technology solutions for water reuse and water efficiency Together we have a strong track record of designing, developing and operating reuse facilities, from small to community scale Siemens and Thames are launching a joint initiative to deliver cost effective, efficient water reuse solutions to the UK market 38 Contact details… Piers Clark, Commercial Director, Thames Water Piers.clark@thameswater.co.uk 07976 344233 39