lebrun MnNdSdAwwa2014 burleighWTP.pptx [Read-Only]awwand.org/docs/swtw2014/Wednesday Disinfection Taste Odor/Ozone... · 6/24/2014 1 advances in ozone disinfection technology the

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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