john anderson - engineers australia · combinations to produce high quality recycled water ......
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Engineers Australia 29 November 2007
John AndersonAfton Water Solutions
Australia
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Engineers Australia 29 November 2007
The Growth in Water Recycling Worldwide
The Drivers – Climate Change and the Environment
Adaptation Case Study – 2006 Metropolitan Water Plan
The Growth in Water Recycling Overseas
The Growth in Water Reuse in Australia
Afton Water Solutions
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Engineers Australia 29 November 2007
Australia’s Water Resources
“Anyone who has a stake in water … is having to face up to the fact that there is only so much to go around.”(Fullerton 2001)
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Engineers Australia 29 November 2007
Climate Change NSW Impacts (Hennessey et al 2004)
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Engineers Australia 29 November 2007
Climate Change NSW Impacts (Hennessey et al 2004)
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Engineers Australia 29 November 2007
Climate Change NSW Impacts (Hennessey et al 2004)
Afton Water Solutions
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Engineers Australia 29 November 2007
Climate Change NSW Impacts (Hennessey et al 2004)
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Engineers Australia 29 November 2007
Living with a Variable Climate
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New South Wales Annual Rainfall
0
100
200
300
400
500
600
700
800
900
1000
1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
Year
Rain
fall (
mm
)
Dry Period: 1900 - 1946
Average Rainfall: 477.7mm
*Dry conditions commenced 1890
Standard Deviation: 90.4
Wet Period: 1947 - 2000
Average Rainfall: 573.9mm
20.1% increase
Standard Deviation: 127.0
New
Dry
2001/06
439.5mm
23.4%
decline
B.Hanstrum, Bureau of Meteorology, 2007
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Engineers Australia 29 November 2007
Living with a Variable Climate
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Murray Darling Basin Annual Rainfall
0
100
200
300
400
500
600
700
800
900
1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
Year
Ra
infa
ll (
mm
)
Dry Period: 1900 - 1946
Average Rainfall: 440.6mm
*Dry conditions commence
1890
Standard deviation: 94.8
Wet Period: 1947 - 2000
Average Rainfall: 516.1mm
17.1% increase
Standard deviation: 114.3
New Dry
2001/06
394.3mm
30.9%
decline
B.Hanstrum, Bureau of Meteorology, 2007
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Engineers Australia 29 November 2007
Water Reuse and Recycling April 2005
Living with a Variable ClimateCentral Coast Streamflows
0
50000
100000
150000
200000
250000
300000
350000
400000
450000
500000
1880 1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010
Year
An
nu
al
Flo
w M
L
Annual Flow 7 Yr Moving Average 10 Yr Moving Average Average Annual Flow 1900-1949 1950-1990 1991-2004
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Engineers Australia 29 November 2007
Restoring River Health
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Engineers Australia 29 November 2007
New Water Sharing PlansLower Wyong Weir Water Sharing Options
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
0 30 60 90 120 150 180 210 240 270 300 330 360
Average Number of Days per Year Flow Exceeds Flow Rate
Flo
w R
ate
ML
/d Flow
A 60%/95th
C 40%/95th
C' 60%/80th
D/E 30%/95th
Existing
Class AClass BClass CClass DClass E
Greater protection of low flows
= longer time between drinks
= greater dependence on storing water from high flows
= likely to need storage and transfer system improvements
= greater drought management risks
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Engineers Australia 29 November 2007
Adapting to Climate Change Impacts- Generalised modelling of impacts and responses
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0%
5%
10%
15%
20%
25%
30%
35%
0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 200%
Ca
pa
cit
y D
/Qm
Storage S/Qm
A.Existing 0%/95th B.EF 20%/80th C.GW3.0deg D.25% New Water E.50% New Water
ExistingCapacity
EnvironmentalFlows 20%/80th
Global Warming3.0 deg C
25% New Water
50% New Water
Water Savings
Environmental Flows and Global Warming CauseLarge Yield Reduction
Large Commitment to Water Savings and New Water
Needed to Re-Balance Supply and Demand
A
B
C
D
E
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Engineers Australia 29 November 2007
Adaptation Case Study - Sydney 2000-2050Traditional Demand and Supply Balance
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Percentages of Year 2000 Demand
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Engineers Australia 29 November 2007
Adaptation Case Study- Sydney 2006 Metropolitan Water Plan
Water Savings
Upto 40% water savings in new houses through BASIX
120GL/a to 140GL/a water savings by existing consumers Water efficiency plans and audits
Water efficient appliances
Rainwater tanks and stormwater harvesting
Leakage reduction
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0%
5%
10%
15%
20%
25%
30%
35%
0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 200%
Ca
pa
cit
y D
/Qm
Storage S/Qm
A.Existing 0%/95th B.EF 20%/80th C.GW3.0deg D.25% New Water E.50% New Water
ExistingCapacity
EnvironmentalFlows 20%/80th
Global Warming3.0 deg C
25% New Water
50% New Water
Water Savings
Environmental Flows and Global Warming CauseLarge Yield Reduction
Large Commitment to Water Savings and New Water
Needed to Re-Balance Supply and Demand
A
B
C
D
E
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Engineers Australia 29 November 2007
Adaptation Case Study- Sydney 2006 Metropolitan Water Plan
Water Reuse
Upto 70GL/a reuse in Western Sydney Residential reuse in new development areas
Agricultural reuse
Environmental flow replacement
Upto 30GL/a reuse through a water recycling grid
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0%
5%
10%
15%
20%
25%
30%
35%
0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 200%
Ca
pa
cit
y D
/Qm
Storage S/Qm
A.Existing 0%/95th B.EF 20%/80th C.GW3.0deg D.25% New Water E.50% New Water
ExistingCapacity
EnvironmentalFlows 20%/80th
Global Warming3.0 deg C
25% New Water
50% New Water
Water Savings
Environmental Flows and Global Warming CauseLarge Yield Reduction
Large Commitment to Water Savings and New Water
Needed to Re-Balance Supply and Demand
A
B
C
D
E
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Engineers Australia 29 November 2007
Adaptation Case Study- Sydney 2006 Metropolitan Water Plan
Western Sydney Water Reuse
Upto 70GL/a reuse in Western Sydney Residential reuse in new development areas
Agricultural reuse
Environmental flow replacement
Water Recycling Grid -upto 30GL/a Camellia industrial reuse project
Georges River pipeline
WRAMS extension
Illawarra Water Reuse 7GL/a
Local water reuse projects e.g. Ku-ring-gai golf courses
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Engineers Australia 29 November 2007
Adaptation Case Study- Sydney 2006 Metropolitan Water Plan
New Supplies
Stormwater harvesting (Prospect roofwater 12GL/a)
Extra pumping from Shoalhaven high flows (about 30GL/a average)
Desalination (upto 90GL/a)
Drought Contingencies
Groundwater
Deep water access
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0%
5%
10%
15%
20%
25%
30%
35%
0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 200%
Ca
pa
cit
y D
/Qm
Storage S/Qm
A.Existing 0%/95th B.EF 20%/80th C.GW3.0deg D.25% New Water E.50% New Water
ExistingCapacity
EnvironmentalFlows 20%/80th
Global Warming3.0 deg C
25% New Water
50% New Water
Water Savings
Environmental Flows and Global Warming CauseLarge Yield Reduction
Large Commitment to Water Savings and New Water
Needed to Re-Balance Supply and Demand
A
B
C
D
E
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Engineers Australia 29 November 2007
Case Study - Sydney 2000-2050New Demand and Supply Balance
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Percentages of Year 2000 Demand
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Engineers Australia 29 November 2007
Managing Drought Risks- Lessons from the Current Drought
Benefits of Building Diverse Portfolios
Benefits in using less volatile supply sources eg water reuse
desalination
Adapting Financial Portfolio Theory
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Engineers Australia 29 November 2007
Growth in Water Recycling Worldwide Water Reclamation
Water Recycling for Agriculture and Industry
Water Recycling for Urban Use
Water Recycling to Supplement Water Sources
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Engineers Australia 29 November 2007
Water Reclamation Trends Growth in use of MBR in Europe
Growth in use of MF/RO, UF/RO and MBR/RO combinations to produce high quality recycled water
Advanced oxidation methods to remove trace organics.
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Engineers Australia 29 November 2007
Water Reuse in Agriculture Monterey California
12,000 acres of vegetable crops
Mezquital Valley, Mexico
Wastewater from Mexico City 60m3/s
6m dia tunnel to Mezquital Valley
Irrigation of 90,000 ha
25m3/s recharge to groundwater sources
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Engineers Australia 29 November 2007
Urban Reuse California
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Engineers Australia 29 November 2007
Water Recycling to Supplement Water Sources
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Supplementing Supplies - Windhoek
Operating since 1968
Recently expanded to 21ML/d
Average 12% of the Windhoek supply
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Engineers Australia 29 November 2007
Supplementing Supplies - SingaporeSingapore New Water
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Engineers Australia 29 November 2007
Supplementing Supplies – Singapore NEWater www.pub.gov.sg/NEWater
Ulu Pandan 2005
Selestar 2004
Kranji 2003
Changi 2007
Bedok 2002
Tuas Desal 2005
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Engineers Australia 29 November 2007
Supplementing Supplies - Singapore NEWATER - Kranji Dual Membrane Plant CMF-S foreground & RO background
Water Reuse
and Recycling
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Engineers Australia 29 November 2007
Supplementing Supplies – Singapore NEWater
NEWater Education Centre - Bedok
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Engineers Australia 29 November 2007
Supplementing Supplies – Singapore NEWater
NEWater Education Centre - Bedok
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Engineers Australia 29 November 2007
Supplementing Supplies - Berlin
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Engineers Australia 29 November 2007
Supplementing Supplies - Berlin
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Lake Tegel Nutrient Reduction Plant 6m3/s
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Engineers Australia 29 November 2007
Groundwater Recharge - Belgium
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Engineers Australia 29 November 2007
Groundwater Recharge - Belgium
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Engineers Australia 29 November 2007
Groundwater Recharge California
Seawater
Fresh water
20% saline ingress control
80% indirect potable (12-24 months)
Mixing zone sampling
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Engineers Australia 29 November 2007
Groundwater Recharge - CaliforniaWater Factory 21, California 330ML/d @ 1.19 MWh/ML
(versus 1.8 - 2.6 MWh/ML imported water)
Plan to expand to 494ML/d over 20 years.
West Basin, California 4 CMF/RO Plants 64ML/d
10.5 MLD to aquifer 1997
12.5 MLD to Mobil 1998
22.4 MLD to Arco 1999
15.9 MLD to Chevron 2001
Ultimate capacity 334 ML/d “Title 22” water for industry & irrigation
“Barrier Water” to control seawater intrusion
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Engineers Australia 29 November 2007
Growth in Water Recycling in AustraliaAgricultural Reuse
Werribee Pasture
Shoalhaven Dairy Farms
Virginia Vegetables, SA
McLaren Vale Vineyard, SA
Hervey Bay, Qld
Mackay, Qld
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Engineers Australia 29 November 2007
Water Reuse and Recycling April 2005
Urban ReuseSydney Olympics Water Recycling
Treated stormwater & wastewater. 7 ML/d CMF + 2 ML/d RO Landscape, Toilet Flushing, Laundry 2000 houses 850 ML/year (1300ML in a dry year)
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Engineers Australia 29 November 2007
Water Reuse and Recycling April 2005
Urban Reuse
Dual Reticulation Water Recycling
Rouse Hill Water Recycling, Sydney Reclaimed water, Rouse Hill STP. NSW Urban & Residential Grade Sand Filtration, CMF and ozone Landscape & Toilet Flushing 10000 houses Stage 1 35000 houses Stage 2 11ML/day
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Engineers Australia 29 November 2007
Coomera-Pimpama Project
Prediction: 83% reduction
Source: Gold Coast Water
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Engineers Australia 29 November 2007
Water Reuse and Recycling April 2005
Eraring Power Station NSWDual Membranes 4ML/d reclaimed water for boiler feed
Capital cost A$5M
Deferred effluent pipeline A$2.4M
Deferred potable distribution A$2.6M
3 x 90M10C CMF feeds
2x 2 stage RO (10xstage1, 4xstage 2)
$900,000/year water & chemical savings
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Engineers Australia 29 November 2007
Luggage Point, Brisbane 14ML/d
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Engineers Australia 29 November 2007
Kwinana Water Factory WA 16ML/d
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Engineers Australia 29 November 2007
Growth in Water Recycling in Australia Brisbane Western Corridor Water Recycling Project
Advanced water recycling – upto 350ML/d
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Engineers Australia 29 November 2007
From Large Store/Use/Treat/Discharge Systems
Sewage
Freshwater
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Engineers Australia 29 November 2007
To Integrated Power/Water/Recycling Systems
Sewage
Seawater
Reclaimed Water
Recycled Water
Fresh Water
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Engineers Australia 29 November 2007
Conclusions
Climate change and environmental flows will have big impacts on reliability and security of water supplies
Adaptation strategies include large commitments to water efficiency and water savings
Benefits in building diverse portfolios including less volatile sources e.g. water reuse and desalination
There is rapid growth in water recycling worldwide
Water recycling to supplement drinking water sources is growing rapidly.
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