Disinfection System
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Transcript of Disinfection System
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UVDisinfection System
Detailed Design
Ashbridges Bay Treatment Plant
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• Meeting Objective
• Project Background
• Project Implementation
• Design Criteria
• UV Disinfection Facility
• UV Supplier Selection
• Effluent Discharge Management
• Capital / Project Schedule
Agenda
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Presentation of the UV Disinfection Facility detailed design prior to Tendering and Construction
Meeting Objective
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Project Background
• Improved ABTP discharge treated effluent quality
• Discontinue use of the Seawall Gates
• Improved nearshore water quality at ABTP
• Eliminate chlorination by-products during normal operation
• Eliminate residual chlorine during by-pass
• Increased ABTP process reliability and operational flexibility
• Connect to the new outfall
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Project Objective
• Design and construct an UV disinfection facility that meets all regulations
Success Factors
• Elimination of residual chlorine discharge to the lake
• Discontinue the use of the seawall gates
• Improvement of the nearshore water quality
• Meeting EA commitments
Project Implementation
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• Effluent flows– 818 MLD (rated capacity)– 2,000 MLD– 3,300 MLD
• Effluent UV disinfection (normal operation)
• Effluent chlorination / dechlorination (by-pass mode)
Design Criteria
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Project Overview
Seawall Substation
Upgrades and New Standby Generators
Plant Water Pumping Station
Upgrades
New Disinfection
Building
New Bypass
Water Tower Elimination
New Outfall (by others)
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New Disinfection Building
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Disinfection Building Overview
Architectural 3DGround Floor Plan
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Disinfection Building Overview
Architectural 3DSecond Floor Plan
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Disinfection Building Overview
Architectural 3DThird Floor Plan
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Disinfection Building Overview
• Combination of Green Roof / Cool Roof
• Solar Wall
Green Roof
Architectural 3DRoof Plan
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UV Facility
UV Equipment UV Channel
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Sodium hypochlorite
Sodium bisulfite
Chemical Storage and Dosing System
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Energy Conservation Measures
• Green Roof
• Solar Wall
• Heat recovery to reduce operational cost
• Occupied/ unoccupied control (light and heat)
• VFDs provided to all fans & pumps
• Heat reclaim for domestic water heating
• Ultra high efficiency and high efficiency motors and lighting
• Mechanical control system linked to ABTP central computer system
• Environmentally friendly refrigerants in air-conditioning system
• Variable Refrigerant Flow (VRF) in air-conditioning system
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UV Equipment Competitive Pre-Selection
Monetary Criteria
• Equipment capital cost
• Facility capital cost
• Operating cost
Non-Monetary Criteria
• Vendor experience
• Performance guarantee
• Service capabilities
• Replacement parts
• Reference facilities
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• Highest score
• Lower energy consumption
• Lower number of lamps
UV Pre-selected Supplier – TrojanUV
Lamp TechnologyNumber of
LampsRequired
Power Draw
Low Pressure – High Output 4,720 1,180 kW
Medium Pressure – High Output 1,680 4,300 kW
New Low Pressure – Very High Output 1,408 1,280 kW
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Discharge To Lake 2017 – 2020 (during UV facility construction)
By-Pass Disinfection
Existing Outfall and Seawall Gates
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Discharge to Lake 2020 to 2023 (UV operation during new outfall construction)
By-Pass Disinfection
Existing Outfall and Seawall Gates
UV Disinfection
UV
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Discharge to Lake 2023 (UV and new outfall)
By-Pass Disinfection
UV Disinfection
UV
New 3,923 MLD Outfall
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Cost and Project Schedule
Total Project Cost (2019 CAD) $220M
Total Estimated Construction Duration 3 years
2017 2018 2019 2020 2021 2022 2023
100% Detailed Design
Start Construction
UVOperationOld Outfall
UV Operation
New Outfall
Design Construction Operation
Tender
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Conclusions
• Meeting EA requirements and applicable regulations
• Eliminate effluent chlorination (during normal operation with UV)
• Improve effluent quality and near shore lake water quality
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Thank you
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