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Woo Chee Hoe

Water Safety Conference 2010. Woo Chee Hoe. Integrated Water Quality Management Plan – PUB’s Strategy in Ensuring Safe Drinking Water. Our Demographics. Water Safety Conference November 2-4 2010, Kuching, Malaysia. Augmenting Singapore’s Water Supply. Our 4 National Taps.

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Woo Chee Hoe

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  1. Water Safety Conference 2010 Woo Chee Hoe Integrated Water Quality Management Plan – PUB’s Strategy in Ensuring Safe Drinking Water

  2. Our Demographics Water Safety Conference November 2-4 2010, Kuching, Malaysia

  3. Augmenting Singapore’s Water Supply Our 4 National Taps Water Safety Conference November 2-4 2010, Kuching, Malaysia

  4. PUB Manages The Complete Water Cycle Indirect Potable Use Direct Non-Potable Use From sourcing, collection, purification and supply of drinking water, to treatment of used water and turning it into NEWater, drainage of storm water Sea Rain Treatment of Used Water Collection of Used Water in Sewers Water Safety Conference November 2-4 2010, Kuching, Malaysia

  5. Closing the Water Loop 9 mgd in Jan 2003 5 mgd in Feb 2004 Seletar Kranji Kranji Expansion 9 mgd  17 mgd Changi 5th NEWater Plant 50 mgd by 2010 32 mgd in Mar 2007 7 mgd in Jan 2003 Bedok Legend NEWater pipeline NEWater Plant Service Reservoir Ulu Pandan Bedok Expansion 7 mgd  18 mgd NEWater independent of the vagaries of weather Water Safety Conference November 2-4 2010, Kuching, Malaysia

  6. Harvesting Every Drop MacRitchie Reservoir Punggol Kranji Reservoir Legend Unprotected Water Catchment Protected Water Catchment Proposed Water Catchment Bedok Stormwater Pond Protected Catchment Urban Stormwater Collection System Unprotected Catchment • Half of Singapore is already water catchment • Catchment area will be increased from half to two-thirds by 2011 Water Safety Conference November 2-4 2010, Kuching, Malaysia

  7. Desalinated Water • To diversify our water resources and ride out the vagaries of weather • SingSpring Pte. Ltd., under a 20 year DBOO arrangement with PUB • Supply of 30 mgd for 20 years • Opened in Sep 05 Water Safety Conference November 2-4 2010, Kuching, Malaysia

  8. - A holistic approach to managing water quality of Singapore’s water bodies Integrated Water Quality Management • Objectives • Ensure all water collected can be treated for drinking which is always safe for consumption • Maintain high level public confidence in drinking water especially when more drinking water will be from unconventional sources • Achieve Key Performance Index (KPI) Water Safety Conference November 2-4 2010, Kuching, Malaysia

  9. Integrated Water Quality Management Water Safety Conference November 2-4 2010, Kuching, Malaysia

  10. Water Safety Plan What ? A plan describing the risk assessment and risk management measures that are or are to be used in order to minimize the likelihood of any piped drinking water failing to comply with the water quality standards Why ? • End-point testing is “too-little” and “too-late” to give effective response • …..and microbial indicators don’t reflect risk Water Safety Plan Water Safety Conference November 2-4 2010, Kuching, Malaysia

  11. WSP Framework Water Safety Plan National Environment Agency (Regulator) Health Based Targets (Piped Drinking Water Regulations) Water Safety Plan (PUB/water suppliers) Water Safety Team* (plan, develop, verify and implement) System Assessment (reservoir, treatment plant, distribution networks) Management & Communication (SOP, emergency / risk management plan) Monitoring (Water Sampling Plan) * Multidisciplinary including those who know about the system those with ability to make decisions, outside “experts” if necessary Surveillance (Audit) Water Safety Plan Water Safety Conference November 2-4 2010, Kuching, Malaysia

  12. Source Water Protection • Protected Water Catchment • only non-pollutive activities are allowed • Unprotected Water Catchment • housing developments and non-pollutive industries with stringent pollution control measures implemented • Catchment Surveillance • Algae Control • Water Quality Monitoring Aeration Fish culture Aquatic plant removal Water Safety Plan Water Safety Conference November 2-4 2010, Kuching, Malaysia

  13. Multiple Barrier Concept of Water Treatment Alum Cl2 Lime Polymer CLARIFICATION OZONATION Fluoride Lime Cl2 BIOLOGICAL ACTIVATED CARBON STORAGE Protected Central Water Catchment Urbanised Catchment SCREENING Cl2 COAGULATION RAW WATER RESERVOIR SAND FILTRATION / MEMBRANE FILTRATION POST- TREATMENT Water Safety Plan

  14. Water Quality Managementin Water Supply System • Management System adopting HACCP 2. Fully enclosed distribution system and storages 3. Ensure compliance of COP by suppliers/retailers of water fittings 4. Comprehensive water quality monitoring 5. Maintaining adequate system pressure & residual 6. Appropriate repair procedures • Boosting Pumps Station • Customers on High Grounds Water Safety Plan Water Safety Conference November 2-4 2010, Kuching, Malaysia

  15. Sampling Points Water Safety Conference November 2-4 2010, Kuching, Malaysia Water Safety Plan

  16. Water Quality Monitoring Approach Water Safety Conference November 2-4 2010, Kuching, Malaysia Water Safety Plan

  17. Integrated Water Management System Analysis and reporting ■ Web-based interface ■ Automated reporting ■ Real-time analysis ■ Alert/escalation mechanism ■ Built-in Six Sigma tools Water Quality Data Mgmt System System Control Centre Data aggregation Water Science Lab SCADA at plants Data collection Laboratory data Online quality data Data types • A strategic operation system for water quality management Integrated Water Management System Water Safety Conference November 2-4 2010, Kuching, Malaysia

  18. Water Security Water Security • Conventional Fish Tanks 2) Online surrogate parameters sensors 3) Fish Biosensors Conventional Fish Tanks for Water Quality monitoring Water Safety Conference November 2-4 2010, Kuching, Malaysia Water Security

  19. Fish Biosensor • Physiological Responses • A proprietary online system that assesses water quality by monitoring physiological responses of fish to water contaminants • Round-the-clock surveillance of water resources at sensitive and critical installations. • Improve lead time for action during trigger events. • Normal • Alert Water Safety Conference November 2-4 2010, Kuching, Malaysia Water Security

  20. Fish Activity Monitoring System • Camera • Fish Tank • Collaborative Project between PUB and I2R • An on-line system that assesses water quality by monitoring the physical behaviour (e.g. movement) of fish to generate fish silhouette and motion trajectory. • Round-the-clock, automated surveillance of water resources. • Further improve lead time for action during trigger events. • To install the FAMS stations at 55 locations, such as service reservoirs and waterworks. Water Safety Conference November 2-4 2010, Kuching, Malaysia Water Security

  21. Three Tier Water Monitoring Plan • First tier water monitoring • - Rapid screening the likely presence of toxic chemical and biological hazard in water sample within 30 minutes • Second tier water monitoring • - Identify, quantify and confirm the presence of specific chemical and microbial contaminants within 4 hours • Third tier water monitoring • - Identify and confirm the presence of specific pathogens and bacteria species in water sample within 24 – 48 hours Water Safety Conference November 2-4 2010, Kuching, Malaysia Water Security

  22. Internal and External Audit Panels • IAP: chaired by local expert in NUS • EAP: 5 foreign experts and 2 local experts • Independent audit every 6 months Water Safety Conference November 2-4 2010, Kuching, Malaysia Surveillance/Audit

  23. Areas of Audit PSRS • Emerging Issues & concerns for Drinking Water DTSS • Major water projects and initiatives undertaken by PUB e.g. Tuas Desalination DBOO, Ulu Pandan NEWater DBOO Plant, Marina Barrage & Punggol-Serangoon Reservoir Scheme MARINA RESERVOIR • Operation and maintenance of NEWater Factories and Waterworks CHANGI WRP & NEWATER • Sampling and analysis of water quality including NEWater, reservoir raw water and potable water • Staff training and competency PUB Water Safety Conference November 2-4 2010, Kuching, Malaysia Surveillance/Audit

  24. R&D in Water Quality Transmission / Distribution Pumping Mains / SR MicrobialEcology in distribution system Study on Nitrification Study Flow Pattern in SR Improving Water Flow in Pipelines Trace Organics & PPCPs Minimum Changes in quality • Consistent • Good • Quality Fish Activity Imaging Response of Surrogates to Toxic Contaminants • P • Prevent • External Contamination Event Prediction (SANDIA) Wireless Sensor for Distribution Network (MIT) Adequate Monitoring Developing WQ Sensors for Deployment in Network Water Safety Conference November 2-4 2010, Kuching, Malaysia R&D in Water Quality

  25. R&D for Real-time Water Quality Monitoring Imported Water Service Reservoir Distribution System WSCC Online Sensors (critical locations) Online Sensors (pumping mains) • Fish Biosensors • FAMS • Transgenic Fish • Online Event Detection (CANARY) • Source Identification (PONI) • Sensor Placement (SPOT) • Piezoelectric • N DLC: Pt • MZI sensors Mobile Water Quality Stations • Next Generation Microbial Sensors • Wireless Data Transmission Water Sampling Baseline Data Water Safety Conference November 2-4 2010, Kuching, Malaysia

  26. Marina Barrage, Singapore Thank You

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