ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Metropolitan Local Government Group
Recycled Water Scheme For Metropolitan Adelaide
Opportunities and Constraints
Presented by Nathan Silby
www.wallbridgeandgilbert.com.au
Page 1
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Recycled Stormwater
• Harvest Volumes
o
Current – 8 GL/annum
o
Committed – 13 GL/annum
o
Proposed – 10 GL/annum
USHOS 6.2, 11.6, 8.8 – 26.6 GL/a
• “Water For Good” targeted capture and
harvest of 35 GL/annum by 2025
www.wallbridgeandgilbert.com.au
Page 2
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Sewage
• 85 GL/annum currently produced in the
greater Adelaide area.
• Approximately 25 GL/annum is reused.
• Storage requirement 40 GL
(Hope Valley + Happy Valley 14 GL)
www.wallbridgeandgilbert.com.au
Page 3
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Recycled Stormwater v’s Treated Effluent
• Combined potential yield ≈ 140 GL/annum
• 75% of Adelaide's current mains water
supply, (≈ 180 GL/a) & 40% of the
predicted 2050 supply (≈360 GL/a) .
• Demand for non-potable water less than
potential supply – prioritisation of treated
wastewater v's stormwater required.
(Council irrigation Demand 5 GL/a)
www.wallbridgeandgilbert.com.au
Page 4
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Distribution Networks
• A number of constructed, committed &
proposed networks across metro
Adelaide.
• Connection between networks to provide
reliability of supply across council
boundaries.
www.wallbridgeandgilbert.com.au
Page 5
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Page 7
Page 8
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Indicative Network Connection Costs
Network Connection
Possible Route
Connector
Costs
Length
Adelaide Airport – Charles
Trimmer Parade
5km
$2.1m
Routes to run
minimal
$0.2m
1km
$0.4m
1.5km
$0.7m
N/A
Under tender
2km
$0.9m
1.5km
$0.3m
Curtis Road
2.5km
$1.1m
Extensive route
20-30km
$15m
Sturt Connection
Adelaide Airport - GAP
parallel in
sections
Barker Inlet – Charles Sturt
Connection
GAP – Eastern Region
Connection
First Avenue &
Coker Street
Walkerville
Terrace &
Stephen Terrace
GAP – Unley Connection
Hutt Rd &
George Street
Salisbury – Playford
Connection
Bellchambers
Rd & West
Avenue
Salisbury – Tea Tree Gully
Connection
Barina Avenue
& Alexander
Avenue
Salisbury / Playford and
Virginia
North-South Connection
requiring further
investigation
www.wallbridgeandgilbert.com.au
Page 9
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Pricing
• SA Water 75% Tier 2 – ($1.86)
(Current mains water price $2.48)
Bolivar <$0.15 sliding
Glenelg $0.23 to $0.44
•
Salisbury / TTG / Playford
Usage $2.20
Supply $50/annum
Bulk Transfer $1.60
www.wallbridgeandgilbert.com.au
Page 10
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Issues Moving Forward
• Mixing recycled stormwater & treated
effluent (ASR, benefits)
• Prioritisation of source
• Pricing (data, competition, restriction v
price)
• Detailed demand study to quantify likely
demand for reuse water
• Control of carp in treatment wetlands
www.wallbridgeandgilbert.com.au
Page 11
ADELAIDE
DARWIN
MELBOURNE
PERTH
WHYALLA
Issues Moving Forward
• Assessment of the tertiary aquifers
capacity to store expected volumes of
stormwater.
• Use of treated stormwater as a source of
potable water.
• Interconnection between council
networks (operation, liability, benefits)
• Funding
www.wallbridgeandgilbert.com.au
Page 12