lebrun mnndsdawwa2014 burleighwtp.pptx [read-only]awwand.org/docs/swtw2014/wednesday disinfection...
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ADVANCES IN OZONE DISINFECTION TECHNOLOGY THE NORTH BURLEIGH WTP PROJECTLOUIS LEBRUN, PE PINNACLE OZONE SOLUTIONS, LLC JOSEPH HONNER, PE BARTLETT & WEST ENGINEERSDOUG NEIBAUER SOUTH CENTRAL REGIONAL WATER DISTRICTSTEPHEN ROBERTS S ROBERTS CO
Ozone Basics:WHAT IS OZONE? WHY USE IT?
• Highly reactive form of tri‐atomic oxygen, formed when O2 is ionized and recombines as O3
WHY USE OZONE?
• Strongest primary oxidant available for w/wwtreatment
• ~50% More Powerful than Cl based oxidants
• 12.5 more times soluble in water than oxygen
• Non‐selective oxidant, extremely versatile for: Di i f i T&O C l TOC THM EDC T /
Ozone Molecule
Disinfection, T&O, Color, TOC, THMs, EDCs, Trace / Other Organics
• Decays back to O2 – minimized by‐products
• Easily adapted to AOP process with H2O2 or UV
• Extremely flexible & efficient treatment
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How is Ozone Formed• Ozone is highly reactive and must be
generated at point of use.
• Introduce Air or O2 into a highly
Conventional Ozone Generator System
2
ionized environment
• O2 splits and reforms to O3
• O3 Systems require O2 supply, cooling, and significant electrical feed
O2+ O3
OUTCooling IN
O2 IN
Cooling Water OUT
Electricity IN
OZONE LIMITATIONS• Technology & Cost have significantly
limited widespread adoption of
ozone technology
• Operators: “Love Results. Hate
Equipment.”
TECHNOLOGY LIMITATIONS
• Large / Heavy / Complicated Systems
• Electrical Hazards
• Audible & EMI Noise
• Heating / Cooling Issues
Conventional O3 System
• Hi O2 + N2 Demands
• Limited Turn‐Down
• Corrosion / Overheating
• Frequent / Difficult / Expensive Service
• Poor Service & Parts Availability
• Generally Very High OPEX Dielectric Service
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The North Burleigh WTP• North Burleigh WTP
• Constructed 2005 @ 1.2 MGD
• GWUI Missouri River• GWUI Missouri River• Innovative Angle Well Intake Design• Riverbank Filtration Credit• Variable GW / SW Mix • Fe: 0-5 mg/l• Mn: 0-0.8 mg/l• TOC: 0-3.5 mg/l• 10-30% daily variability10 30% daily variability
• Hybrid Treatment Process• MF / RO Membrane Filtration• O3 Settling Pre-Treatment (Fe+Mn)• O3 Disinfection
Existing Ozone SystemTWO Ozone Applications1) Raw Water Pre-Treatment
• Oxidation of Fe, Mn, TOC, ,• O3 Dose: ~2-3 mg/l• Bisulfite Quench: 10-15 mg/l
2) Disinfection• O3 Dose: ~0.5-1 mg/l• TOC + Disinfection
…Good Treatment, but…
Original Ozone System Challenges• Air-Based O3 = Limited to 1-2% BW O3
• Difficult O3 Process Control (dosing)• Limited System Turn-Up / Down• O3 Quenching to Protect UF / RO • Very Hi Maintenance & OPEX Cost
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North Burleigh WTP Process:
2010 WTP Improvements• Double WTP Capacity
• Improved Ozone Process• 140% More O3 Capacity (120 ppd)• Constant 8% BW Operation• Demand-Paced O3 Control• Improved O3 Process
Instrumentation• Improved Turn-Up/Down
• Improved Costsp• Reduced Maintenance• Lower Overall Cost
• Everything Must Fit in the Existing Available Space
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2010 Burleigh WTP Upgrade• Expand WTP Capacity to 2.5 MGD
• New MF & RO Systems
• New & Improved O3 Process / Controls
New Ozone TechnologyIntegrated Ozone System Supply
• New 120 #/d O3 Generator @ 9% BW O3
• New VSA O2 Feed System2 y
• New Raw & Disinfection O3 Injection Skids
• Awarded on Lowest NPV CAPEX+OPEX
Ozone-On-Demand™ Controls• Continuous Real-Time Demand Paced
Ozone Generation & Dosing Control
• Constant %BW O Concentration• Constant %BW O3 Concentration Reduces OPEX & Improves Performance
• Continuous Process Monitoring & Optimization
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New Ozone TechnologyModular
-Modular Capacity O3 Platforms-Flexible Design / Integrated ControlsBuilt in Redundancy-Built-in Redundancy
Reliable-Sealed-Cell Service-Free Design-Ceramic Dielectrics / Advanced
Materials-Made In USA / Local Support
Efficient
Ozone Cell
-Service-Free Sealed-Cell Design Reduces Maintenance
-20-40% Lower Unit Energy-40-60% Smaller Footprint-70+% Lower O3 OPEX-Very Simple Installation 600 ppd Ozone
Platform
• 6 c6
SIMPLIFIED INSTALLATION::Only Five (5) Connections
(1) Power In
(2) Oxygen In
(3) Ozone Out
1
2
3(3) Ozone Out
(4) Cooling Water In / Out
(5) Controls I/O
3
4
5
12
45
3
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Ozone‐On‐Demand™ Controls::
• Real‐Time Ozone Process Monitoring and Control
• True “Demand Following” Performance
• Constant %BW with 0‐100% Turn‐Down
• Ability to Integrate O3 Demand‐Based Dosing from Multiple Independent Points
• Integrated Ozone Instrumentation Suite(O2 +O3 mass flow, O3%, temp, etc)
• Fully Automatic Startup / Shutdown (~6 min)
• Real‐Time System Diagnostics
• Remote Operation, Diagnostics & Troubleshooting
Demand‐Based Ozone Control:
Existing System Designed for Existing System Designed for
Existing vs Modular OPEX Existing vs Modular OPEX
g y gPeak Capacity Condition
(0.001% of Time)
g y gPeak Capacity Condition
(0.001% of Time)
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Ozone Performance Improvements:
Conclusions & Results:• New Ozone Processes
• Significantly Reduce O3 OPEX and Maintenance• Provide Advanced Process & Cost Control• Are Ideal for Small to Medium Plants
• Ozone System Improvements Can Yield:• Significant Process Optimization• Reduced Unit Chemical & Power• Improved MF / RO Performance• Reduced O3 Maintenance• Highly ReliabilityHighly Reliability• Lower Total Unit OPEX
Results of Project:• Emmons WTP
• SCRWD ordered a 2nd
Identical O3 System • July 2012 Startup
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KEY RESULTS::• New Ozone Technology is Modular, Efficient, & Reliable
• Flexible Compact Systems Fit Many Applications
• Integrated System Supply (O +O +Injection) Simplifies• Integrated System Supply (O2+O3+Injection) Simplifies Design and Delivery
• Simplified Installation Reduced Construction Cost
• OPEX Savings of 40%+ Are Achievable
• Simplified Installation Reduced Construction Cost
• Ozone Demand Testing Key to Successful Project D liDelivery
• Similar Ozone Design Principals Across Applications (WWTP, Reuse, Industrial, H2S, Air Emissions, Sanitation, etc)
Thanks & Questions
• Thank YOU for Your Time & Attention
• Thanks To:• South Central Regional Water District
• Bartlett & West Engineers
• S. Roberts Company
• PCI Oxygen Systems
• Mazzei Injectors• Mazzei Injectors
• Questions??
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1st Step: Ozone Demand Testing
Evaluate Ozone Performance
• Verify Ozone Dose & Demand
• Verify Ozone Decay Rate and 1/2‐Life
Specialized Testing Facilities
• Complete In‐House Ozone Demand Testing Laboratory
Verify Ozone Decay Rate and 1/2 Life
• Evaluate BDPFP and potential collateral reactions
Testing Laboratory
• Ozone Application R&D
• Ozone Demand / Decay Studies
• Ozone Process Simulation & Design