adelaide darwin melbourne perth whyalla page 1 metropolitan local government group recycled water...
TRANSCRIPT
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 1
Metropolitan Local Government Group
Recycled Water Scheme For Metropolitan Adelaide
Opportunities and Constraints
Presented by Nathan Silby
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 2
Recycled Stormwater
• Harvest Volumeso Current – 8 GL/annumo Committed – 13 GL/annumo Proposed – 10 GL/annumUSHOS 6.2, 11.6, 8.8 – 26.6 GL/a
• “Water For Good” targeted capture and harvest of 35 GL/annum by 2025
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 3
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)
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 4
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)
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 5
Distribution Networks
• A number of constructed, committed & proposed networks across metro Adelaide.
• Connection between networks to provide reliability of supply across council boundaries.
Page 6
Page 7
Page 8
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 9
Network Connection Possible Route Connector
Length
Costs
Adelaide Airport – Charles
Sturt Connection
Trimmer Parade 5km $2.1m
Adelaide Airport - GAP Routes to run
parallel in
sections
minimal $0.2m
Barker Inlet – Charles Sturt
Connection
First Avenue &
Coker Street
1km $0.4m
GAP – Eastern Region
Connection
Walkerville
Terrace &
Stephen Terrace
1.5km $0.7m
GAP – Unley Connection Hutt Rd &
George Street
N/A Under tender
Salisbury – Playford
Connection
Bellchambers
Rd & West
Avenue
2km $0.9m
Salisbury – Tea Tree Gully
Connection
Barina Avenue
& Alexander
Avenue
1.5km $0.3m
Salisbury / Playford and
Virginia
Curtis Road 2.5km $1.1m
North-South Connection Extensive route
requiring further
investigation
20-30km $15m
Indicative Network Connection Costs
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 10
Pricing
• SA Water 75% Tier 2 – ($1.86)(Current mains water price $2.48)
Bolivar <$0.15 slidingGlenelg $0.23 to $0.44
• Salisbury / TTG / PlayfordUsage $2.20
Supply $50/annumBulk Transfer $1.60
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 11
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
ADELAIDE DARWIN MELBOURNE PERTH WHYALLA
www.wallbridgeandgilbert.com.au Page 12
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