steam electric effluent limitations guidelines (elg)
TRANSCRIPT
10/29/2015 © Sargent & Lundy, L.L.C. 2015
Steam Electric Effluent Limitations Guidelines (ELG)
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phones are muted to avoid noise disturbances• Today’s presentation will be available for download on S&L’s
website www.sargentlundy.com• Sargent & Lundy’s detailed summary of the ELG rule is also
available for download on our website
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Sargent & Lundy Webinar
10/29/2015 © Sargent & Lundy, L.L.C. 2015
Steam Electric Effluent Limitations Guidelines (ELG)
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10/29/2015 © Sargent & Lundy, L.L.C. 2015
PanelistsKen Snell – manager of environmental regulatory and permitting group
Matthew Heermann – wastewater treatment technology specialist
Ed Wolfington – manager of material handling group and technology specialist
Darrel Packard – manager of civil design group and civil engineering specialist
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Sargent & Lundy Webinar
PresenterAndy Carstens – director of environmental services
10/29/2015 © Sargent & Lundy, L.L.C. 2015
Today’s presentation will focus on the following:
Agenda
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Overview of ELG Rule
Compliance Strategies
ApplicabilityRegulated StreamsKey Definitions and ProvisionsImplementation
Technologies Minimizing Wet FGD WastewaterProject Requirements (Schedule, Costs)Other Considerations
10/29/2015 © Sargent & Lundy, L.L.C. 2015
ELG Rule Overview
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10/29/2015 © Sargent & Lundy, L.L.C. 2015
ELG Rule Overview
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§ 423.10 Applicability ( to ) 1982 2015
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ELG Rule Overview
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Today’s discussion is limited to standards for:
“Existing” coal-fired plants >50MW
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Surface Water or POTW
Cooling Tower Blowdown
Once-Through Cooling Water
Coal Pile Runoff
Ash Pond
Metal Cleaning Wastewaters
Low Volume Wastes (LVW)
CCR Leachate
ELG Rule Overview
Regulated Waste Streams (1982)
Wet FGDBoiler
Air Heater
ESP
Fly Ash Transport Water
Bottom Ash Transport Water
FGD Wastewater
Drains
Boiler Blowdown
Streams w/No ELG Limit
10/29/2015 © Sargent & Lundy, L.L.C. 2015
CCR Leachate
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Surface Water or POTW
Cooling Tower Blowdown
Once-Through Cooling Water
Coal Pile Runoff
Ash Pond
Metal Cleaning Wastewaters
Low Volume Wastes (LVW)
CCR Leachate
ELG Rule Overview
Regulated Waste Streams (2015)
Wet FGDBoiler
Air Heater
ESP
Fly Ash Transport Water
Bottom Ash Transport Water
FGD Wastewater
Drains
Boiler Blowdown
Streams w/No ELG Limit
FGD Wastewater
Activated Carbon
Baghouse
Flue Gas Mercury Control
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ELG Rule Overview
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Standards for Existing Units >50MW
Stream Existing Unit Standards (>50MW) Technology BasisFly Ash Transport Water Zero-Discharge Dry Ash Handling
FGMC Wastewater Zero-Discharge Dry Ash Handling
Bottom Ash Transport Water Zero-Discharge Dry Ash Handling
or 100% Recycle
FGD Wastewater
As – Daily Max < 11 ug/L, 30-day Avg < 8 ug/L
Hg – Daily Max < 788 ng/L, 30-day Avg < 356 ng/L
Se – Daily Max < 23 ug/L, 30-day Avg < 12 ug/L
N – Daily Max < 17 mg/L, 30-day Avg < 4.4 mg/L
Physical / Chemical and
Biological Treatment
Combustion Residual Leachate Same as current Low-Volume Waste Standards Impoundment
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ELG Rule Overview
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Definition of Transport Water
ANDTransport Water
Used to convey fly, bottom, or economizer ash
Contacts fly, bottom, or economizer ash
Cyclone boiler cooling water to slag tanks overflows to separate outfall. Does contact bottom ash, but is not used to convey the ash. This is not transport water because it does not satisfy both criteria.
Example:
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ELG Rule Overview
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Anti-Circumvention Provisions
Fly Ash Transport Water
Bottom Ash Transport Water
Flue Gas Mercury Control
Wet Wet FGD
FGD Wastewater
Any Plant Process that Discharges
Not Allowed
Allowed
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ELG Rule Overview
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Anti-Circumvention Provisions
Low Volume Waste
Wet Wet FGD
FGD Wastewater
< 4 ug/L
< 178 ng/L
< 6 ug/L
< 2.2 mg/L
< 8 ug/L
< 356 ng/L
< 12 ug/L
< 4.4 mg/L
< DL
< 89 ng/L
< 3 ug/L
< 1.1 mg/L
As
Hg
Se
N
No Dilution
Diluted Stream
Any 1 below DL
*DL – Detectable Limit
AllowedNot
Allowed
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ELG Rule Overview
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Implementation through NPDES Permits
• ASAP considers time, other plant changes, optimization (FGD only)• ASAP date can be different for different streams• If FGD wastewater evaporated, ASAP date is not applicable
10/29/2015 © Sargent & Lundy, L.L.C. 2015
Today’s presentation will focus on the following:
Complying with ELG
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Overview of ELG Rule
Compliance Strategies
ApplicabilityRegulated StreamsKey Definitions and ProvisionsImplementation
Technologies Minimizing Wet FGD WastewaterProject Requirements (Schedule, Costs)Other Considerations
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Complying with ELG
Planning for Compliance
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Surface Water or POTW
Ash Pond
Complying with ELG
Biggest Impacts to Coal-Fired Units
Wet FGDBoiler
Air Heater
ESP
Fly Ash Transport Water
Bottom Ash Transport Water
FGD Wastewater
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Complying with ELG
Technologies – General Format for Following Slides
Other Information• Other Relevant Information
Simplified Process Flow Diagrams
Example schedules from recent projects (note: schedules vary for each project, schedules
shown represent a single example)
Example cost estimates from recent projects (note: costs vary for each project, costs shown
represent a single example)
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Complying with ELG
Bottom Ash – Dry Belt Conveyor
Example cost for single 400 MW
Total Installed Cost ~$18 Million
Other Information• Need sufficient room under boiler• Longer outage required for installation• Cooling air recovers some heat back to the
boiler
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Complying with ELG
Bottom Ash – Submerged Scraper Conveyor
Example cost for single 450 MW unit
Total Installed Cost ~$13 Million
Other Information• Need sufficient room under boiler• Longer outage required for installation
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Complying with ELG
Bottom Ash – Remote Submerged Scraper Conveyor
Example cost for single 450 MW unit
Total Installed Cost ~$18 million
Other Information• Flexibility with location• Minimal outage time required• Larger, higher capital than under-boiler SSC
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Complying with ELG
Bottom Ash – Self-supporting Concrete Basins
Other Information• Minimal outage time required• Larger footprint required
Example cost for single 450 MW unit
Total Installed Cost ~$17 million
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Complying with ELG
Strategies to Minimize FGD Wastewater
• Dry Sorbent Injection
• Alternate FGD Liners
• Produce less wall-board grade byproduct
• Burn lower chloride fuels
• Reverse Osmosis
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Complying with ELG
FGD Wastewater – Physical / Chemical Treatment
Other Information• Established technology• Can meet Hg and As limits• Must be used with biological for Se and N
limits
Example cost for two 550 MW units
Total Installed Cost ~$10 million
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Complying with ELG
FGD Wastewater – Biological Treatment
Other Information• Only a few in operation• Few suppliers available
Example cost for two 550 MW units
Total Installed Cost ~$19 million
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Complying with ELG
FGD Wastewater – Brine Concentration / Evaporation
Other Information• High capital - materials• High O&M• Demonstrated on Wet FGD wastewater in a
few applications
Example cost for single 950 MW unit
Total Installed Cost ~$70 million
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Complying with ELG
FGD Wastewater – Waste Fixation and Stabilization
Example Cost for Two 450 MW Units
Total Installed Cost ~$35 million
Other Information• May still achieve “zero discharge”• Requires testing to determine “recipe” for
chemically fixated and structurally stable product
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Complying with ELG
Developing Technologies
Spray Dryer Evaporation
Forward Osmosis
Zero Valent Iron
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Surface Water or POTW
Ash Pond
Metal Cleaning Wastewaters
Low Volume Wastes (LVW)
Complying with ELG
Impacts of Coal Combustion Residual (CCR) Rule
Drains
Boiler Blowdown
Streams w/No ELG Limit
CCR ponds can be used as long as they cease receiving transport water by the compliance date
“Legacy wastewater” can be discharged, but CCR material within causes CCR rule to be applicable
If pond closure required due to CCR, streams routed to ponds must be recycled, re-routed, and / or treated
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Complying with ELG
Compliance Planning
10/29/2015 © Sargent & Lundy, L.L.C. 2015
Complying with ELG
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Compliance Planning
Technology Implementation ~18 to 24 months
Begin compliance planning now
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Additional Questions ?
Selected Sargent & Lundy Services to Support Compliance Planning through ImplementationWater Balance Preparation
Wastewater Flow and Characterization Compliance Planning and Economic Modeling
Equipment Design Basis, Specification Preparation, and Procurement Support Detailed Design for Balance‐of‐Plant Integration
Project Management and Oversight Permit Application Preparation and Support (NPDES, Section 401/404, State Permits, etc.)
CCR Fugitive Dust Plan Preparation Impoundment Safety Hazard Analyses
Groundwater Monitoring Plans and Well Installation Support CCR Impoundment Location Assessments
CCR Impoundment Safety and Hazard Potential Assessments CCR Impoundment Inspection Plans CCR Closure and Post‐Closure Plans
10/29/2015 © Sargent & Lundy, L.L.C. 2015
Thanks for AttendingIf you have any further questions about this topic or other environmental support, please contact:
Andy Carstens – Director of Environmental Services
Ken Snell – Manager of Permitting and Licensing
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(312) [email protected]
(312) [email protected]
10/29/2015 © Sargent & Lundy, L.L.C. 2015
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