option sets costing analysis
TRANSCRIPT
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Westside Select Committee Interim Findings Option Sets Costing Analysis
September 29, 2015
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>20 Sites and 9 Option Sets
Examine 4 Plant & 1 Plant Option Sets
Insights on 2 Plant Option
Deeper Study in Feasibility and Costing
Wastewater, Residual Solids Treatment, Sites
Target Market Resource Recovery
Order of Magnitude Costing
Background
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Test the preliminary criteria and receive direction on how to enhance
Compare costing, technology options and option set evaluations to confirm project outcomes
Background
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Feasibility and Costing Elements
Resource Recovery
Target Markets •Customers + End Use
•Growth and Partnerships
Life-Cycle Costing •Option Sets
•Capital + Operating •Revenues
Design Criteria •Public Input & Levels of
Service •Regulations + Standards
Wastewater Treatment (Liquids)
Residual Solids
Treatment
Suitable Technologies & Option Sets
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Target Markets Resource Recovery
Target Markets •Customers + End Use
•Growth and Partnerships
• Long-term Demands & Revenues • Technology Footprint • Energy Balance • Ability to Support community
Amenities • Scope of Infrastructure Needs • Synergy with Public Services
Water Reuse •Park Irrigation • Indirect Potable Reuse e.g. Toilet •Aquifer Recharge •New Markets: Streams, Greenhouses
Solids and Heat Recovery •Historic: Land Apply, Landfill • Industrial Partnership e.g. fuel, kiln, fertilizer •Thermal e.g. gasification • Incinerate • Low-Grade Heat
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Ingredients for Service Effectiveness • Clustered customers with high demand • Clear policy or incentives for use • Irrigation provides high-demand, ease of
application (local challenges) • Aquifer recharge feasibility • Toilets (indoor substitution) @ Growth • Potential for new markets – synergy with
regional/local needs e.g. agriculture • Stream augmentation challenges
0%
20%
40%
60%
80%
100%
Colwood Esquimalt Langford View Royal
Target Markets Water Reuse • Park Irrigation • Indirect Potable Reuse e.g. Toilet • Aquifer Recharge • New Markets: Streams,
Greenhouses
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Target Markets Solids and Heat Recovery •Historic: Land Apply, Landfill • Industrial Partnership e.g. fuel, kiln,
fertilizer •Thermal e.g. gasification • Incinerate •Low-Grade Heat
Ingredients for Service Effectiveness • Committed customer(s) with specified product
quality • Value of biogas depends on fuel it is offsetting • Energy Utilization Technologies Must Balance
Energy Uses and Cost • Synergies/Partnerships with other services • Integrate with other waste to leverage energy
resources
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Design Criteria Design Criteria •Public Input & Levels of
Service •Regulations + Standards
• Design Criteria translate the goals and objectives of this project into node/site applications
• Connect public input into engineering outcomes
• Four types of applications across the Westside
• Criteria narrow the range of technologies
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Design Criteria Design Criteria •Public Input & Levels of
Service •Regulations + Standards
Guiding Technical Criteria • Leverage existing infrastructure and minimize operating costs • Look for long-term revenues and resource demands • Look to integrate with other public services and community building e.g.
waste streams • Include capacity phasing • Site, system and technology resiliency • Carbon, energy and footprint considerations • Provide for positive and safe public interaction
Establishes the framework for more detailed, instructive engineering criteria.
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Design Criteria Design Criteria •Public Input & Levels of
Service •Regulations + Standards
1 Plant Option (Westside)
• >50 MLD in non-residential setting • Sidestream tertiary (market needs) + meet effluent regulations • Large-scale solids and energy recovery
• 30-50 MLD in residential-commerce center • Sidestream tertiary (market needs) + meet effluent regulations • Convey solids to regional facility • Potential co-gen opportunities
Large Distributed
Plant (Westside)
• Medium @ 10-30 MLD and Small @<10 MLD in residential setting
• Full tertiary for reuse and livability criteria
• Liquids focus while solids conveyed to larger facility
• Scale, look and experience of facility to suit neighborhood
Medium Plant
Small Plant
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Costing Factors
• Order of magnitude suits level of detail and saves room for optimization
Life-Cycle Costing •Option Sets
•Capital + Operating •Revenues
Cost Breakdown
•Recent US and Canadian Projects •Operating Costs to come •Revenues to be developed •Factors involved: Contingency for design and
construction risks US currency conversion Contractor profit Inflation and further escalation Service administration
Escalation Considerations
•Happens in every industry •Changes in NA economy 2010-2015 •Us Currency Exchange •Labor Rate trends •Different sites and infrastructure needs •Supply-demand trends for wide variety of materials and products
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Wastewater Technologies
Wastewater
Treatment
(Liquids)
Residual
Solids
Treatment
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Solids Recovery Technologies
Wastewater
Treatment
(Liquids)
Residual
Solids
Treatment
Aerobic Anaerobic Gasification
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Water + Energy Balance
25% Dry Solids 4,000 Kcal/kg 75% Water -1,800 Kcal/kg 1 kg of solids 4 kg of sludge 1 kg dry solids 4,000 Kcal 3 kg of water -5,400 Kcal NET Energy -1,400 Kcal
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Water + Energy Balance
85% Dry Solids 4,000 Kcal/kg 15% Water -1,800 Kcal/kg 1 kg of solids 1.18 kg of sludge 1 kg dry solids 4,000 Kcal 0.18 kg of water -324 Kcal NET Energy 3,676 Kcal
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Water + Energy Balance RAW DRYING GASIFICATION
4,000
0
-4,000 Solids Water NG Syngas Net in Solids
“Tipping Points”
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RAW DRYING GASIFICATION
4,000
0
-4,000 Solids Water NG Syngas Net in Solids
Water + Energy Balance “Tipping Points”
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RAW DRYING GASIFICATION
4,000
0
-4,000 Solids Water NG Syngas Net in Solids
Water + Energy Balance “Tipping Points”
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>20 Sites and 9 Option Sets
Examine 4 Plant & 1 Plant Option Sets
Insights on 2 Plant Option
Order of Magnitude Costing
Option Sets
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4 Plant Option Set Advantages • Scale flows and footprint
to suit communities • Stronger alignment with
potential water reuse e.g. more effluent @ tertiary quality
• Utilizes some existing
infrastructure • Esquimalt facility close to
outfall • Ability to phase in
capacity for/at growth
Challenges •Increases reuse but requires extensive new infrastructure •Multiple truck patterns •Reinvestment into Craigflower PS •Esquimalt site challenged to accommodate liquids & solids
•Challenges in minimizing life cycle costs
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1 Plant Option Set Advantages • Site suits significant capital
investment • Some local opportunities
for water reuse • Lowest infrastructure
needs • Opportunity for
comprehensive ‘green’ development
• Lowest cost option / revenues virtually unchanged
Challenges • Modest reuse
opportunities • Concentrates capacity
in one location • Meets effluent
regulations yet less flow to tertiary levels
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Option Set Reflections How To? • Expand and innovate water reuse without extensive
infrastructure
• Phase capacity with growth @ growth
• Better address project goals
• Distribute facilities without substantial effect on overall cost
Encourages a scaled-back two-plant option that: Adjacent new growth Adjacent known reuse opportunities Does not need new outfall Allows for expansion with growth Lowers costs Westside solution that considers public input and aspirations
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2 Plant Option Set Advantages • Includes advantages of 1 Plant Option set • Includes innovative reuse in aquifer
recharge • Addresses 1 Plant Challenges Expands water reuse opportunities Distributes capacity where there is growth Increases amount of tertiary effluent
• Note: some loss of economies of scale
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Setting Direction 1. Consider reporting and analysis to focus on the 1-plant and 2-plant
option sets
2. Continue to assess costs for secondary versus tertiary at 1-Plant Option
3. Develop potential revenue projections
4. Further assess site feasibility to narrow most preferred
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Setting Direction 1. Consider aerobic, anaerobic and gasification process costs/revenues
2. Evaluate solids technologies (e.g. digestion and gasification) by creating
expectations for a response by the private market: end-product demand
Revenue
synergy with public service
life-cycle cost
overall energy balance
3. Costs and infrastructure lower for 1 location @ residual solids recovery
4. Select technologies to suit design criteria
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Thank You