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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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Water Safety

Conference 2010

Woo Chee Hoe

Integrated Water Quality Management Plan –

PUB’s Strategy in Ensuring Safe Drinking Water


Water Safety Conference

November 2-4 2010, Kuching, Malaysia


Our 4 National Taps

Water Safety Conference

November 2-4 2010, Kuching, Malaysia


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


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


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


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


- 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


Integrated Water Quality Management

Water Safety Conference

November 2-4 2010, Kuching, Malaysia


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


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


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


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


Water quality management in water supply system
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


Sampling Points

Water Safety Conference

November 2-4 2010, Kuching, Malaysia

Water Safety Plan


Water Quality Monitoring Approach

Water Safety Conference

November 2-4 2010, Kuching, Malaysia

Water Safety Plan


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


Water security

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


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


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


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


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


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


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


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



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