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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.

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Adelaide darwin melbourne perth whyalla

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.auPage 1


Adelaide darwin melbourne perth whyalla

ADELAIDE DARWIN MELBOURNE PERTH WHYALLA

Recycled Stormwater

  • Harvest Volumes

    • Current – 8 GL/annum

    • Committed – 13 GL/annum

    • 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.auPage 2


Adelaide darwin melbourne perth whyalla

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.auPage 3


Adelaide darwin melbourne perth whyalla

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.auPage 4


Adelaide darwin melbourne perth whyalla

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.auPage 5


Adelaide darwin melbourne perth whyalla

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Adelaide darwin melbourne perth whyalla

ADELAIDE DARWIN MELBOURNE PERTH WHYALLA

Indicative Network Connection Costs

www.wallbridgeandgilbert.com.auPage 9


Adelaide darwin melbourne perth whyalla

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.auPage 10


Adelaide darwin melbourne perth whyalla

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.auPage 11


Adelaide darwin melbourne perth whyalla

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.auPage 12


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