pci oxygen in water treatment
TRANSCRIPT
PCI VSA Oxygen Systems
Pure Oxygen in Water & Wastewater TreatmentMarch, 2010
Oxygen in Water & Wastewater
• Odor Control – Lift Stations/Headworks
• Replace traditional aeration in WWTP
• Lake oxygenation
• Ozone disinfection feed gas
• Remediation (ozone and HIPOX)
Traditional Aeration
• Many different types of aerators; surface, course bubble, fine bubble, etc.
• Most significant energy consumption >60% of plant energy use.
• Mixing and oxygen transfer inherently linked.
• May be susceptible to fouling incurring high maintenance & energy costs, and oxygen transfer limitations. Clogged Polyurethane diffuser
plate after 9 months of use.
Pure Oxygen Use in WWT
• UNOX – Introduced
by Linde in 1968
• OASES – Developed
by Air Products/now
owned by Kruger
• Many gas companies
use technology to sell
their molecules –
Captive Technology Schematic of UNOX Process.
Why Pure Oxygen• Water solubility of pure oxygen at 25oC and 1 atm. is 40 mg/L water.
• Using air the oxygen partial pressure is 0.2 atm.
This results in oxygen dissolution of 40 X 0.2 = 8 mg O2/L in water.
• D.O. is often a limitation in WWT that can be addressed by exploiting properties of pure oxygen.
Oxygen (Using Air) Solubility in Clean Water Pure O2 can significantly increase DO levels
Advantages of Pure Oxygen
• Reduced reactor size/footprint
• Reduced energy consumption
• Reduced VOC stripping and odors
• Reduced foaming issues
• Separate mixing and oxygen requirements
• Less susceptible to low alpha factors
• To achieve benefits of pure oxygen, take advantage of 1/5 volume of gas and higher dissolution capabilities.
• Pure oxygen alone is not the answer Must be coupled with synergistic application technology
Exploiting Potential of Pure Oxygen
Speece Cone fromECO2 System dissolves O2 at 90-95% absorption efficiency to achieve D.O. concentrations of 50 to >150 mg/L
Applications:Odor ControlReservoir Oxygenation
Exploiting Potential of Pure Oxygen (2)
SDOXTM
fromSDOX System dissolves O2 at 99% absorption efficiency to achieve D.O. concentrations of 300 to 350 mg/L
Applications:Odor ControlWWTPReservoir Oxygenation
Exploiting Potential of Pure Oxygen (3)
Dissolved Oxygen Augmentation from Dynamox
Dynamox system dissolves O2 at 99% absorption efficiency to achieve D.O. concentrations of 800 mg/L
Applications:Odor ControlWWTPReservoir Oxygenation
Exploiting Potential of Pure Oxygen (4)
OxyMBR from
Suitable for flows < 25,000 m3/dayHigh Strength Wastes 2,500 – 50,000 COD
Applications:Industrial & Municipal WWT
Exploiting Potential of Pure Oxygen (5)
Biobooster PBR & MBR from
Targeted for high strength wastes
Applications:Typically Industrial WWT
Exploiting Potential of Pure Oxygen (6)
UnderWater Oxygenator (UWO) from
Oxygen injection inwastewater aeration basins: 9.35 lbs O2/hp-h
Applications:Secondary treatment at WWTP’s
Exploiting Potential of Pure Oxygen (7)
HiPox – Ozone/ Hydrogen Peroxide Remediation
Ex-Situ Remediation
Applications:Remediation of contaminated ground water
Oxygen Supply Map
70%
75%
80%
85%
90%
95%
100%
0 1 10 100 1,000
Cryo
LOX
VSA
PSA
Cryo
LOX
PS
A2 Bed VSA
Cyl
1 Bed VSA
O2
Pu
rity
(%
)
TPD or 000 SCFH
O2 Product Offering: Small to Medium Size
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DOCS 500 Dimensions: 8’x8’x8’
• DOCS 66 –140 SCFH / 280 lbs/day
• DOCS 200 –425 SCFH / 845 lbs/day
• DOCS 500 –1060 SCFH / 2100 lbs/day
• All available with remote monitoring system
DOCS 200 Dimensions:
6’x6’x6’
DOCS 66 Dimensions: 4’x 4’ x 4’
*DOCS 66 (DOCS 200) ~ 5 m3/hr (~15 m3/hr) @ 90% purity.
O2 Product Offering: Large Sizes
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DOCS 1500
(3 TPD / 3,180 SCFH)
Containerized version
DOCS 5000 (10 TPD / 10,600 SCFH)
O2 Product Offering: Larger Size
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2 x DOCS 5000 (20 TPD / 21,200 SCFH)
PSA vs. PCI VSA Technology Schematic
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O2 Buffer Tank
Product Valves
Adsorber
Vessel
Inlet
Vent
Compressor
Dryer
Feed & Vent
Valves
Feed Buffer Tank
Adsorber
Vessel
COMPLEX PSA TECHNOLOGY SIMPLIFIED VSA TECHNOLOGY
Inlet
Adsorber
Vessel
Reversible
Blower
O2 Buffer Tank
Oil-free O2
Compressor
Vent
PSA VSA
Power (kWh / m3): 1.5 0.8
# Main Components: 6 4
# of Process Valves: 10 3
Metrics (200 lpm @ 55 psig):
DOCS Operating Cost Examples
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DOCS 200
845 lbs/day
DOCS
Operating Cost
per ccf
(per m3)
LOX
Delivered Cost
per ccf
(per m3)
Typical PSA
Operating Cost
per ccf
(per m3)
Product Platform
DOCS 66
280 lbs/day
$0.31
($0.11)
$0.25
($0.09)
$0.21
($0.07)
DOCS 500
2100 lbs/day
$0.55 - $0.85
($0.20 - $0.30)
$0.35 – more than $10.00
($0.12 – more than $3.00)
Notes:
- ccf is hundred cubic feet which is a common term in the industrial gas industry
- @ 55 psig (~ 4 barg) output pressure and 93% purity.
*DOCS 66 delivers ~ 5 m3/hr, DOCS 200 delivers ~ 15 m3/hr @ 90% purity.
- Includes energy ($0.10/kWh) and Preventive Maintenance cost.
Typical Oxygen Application Examples
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Mobile Field Hospital Aquaculture
Wastewater:
Odor Control
at Lift Station
Groundwater Remediation
DOCS 500 at PCI Open House DOCS 200 at Industrial
WWTP
Summary
• Long history of oxygen use in Water Treatment– UNOX, OASES
– Emerging Applications – Speece Cone, Blue In Green, Grundfos
• It all starts with low cost, reliable oxygen supply
• PCI’s Oxygen VSA Technology Advantages– Extremely low power consumption
– Very few components – low maintenance cost
– Leading to very low operating cost
– Best on-site oxygen solution available
• Your questions, please!
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• For more information, contact:
– Dave Schneider, Sales Director, Western US
• [email protected], 951-567-3177
– Tom Elzey, Sales Director, Eastern US
• [email protected], 951-847-6169
Pacific Consolidated
Industries
12201 Magnolia Avenue
Riverside, CA 92503-4820
USA
(951) 479-0860 – phone
(951) 479-0861 – fax
www.pci-intl.com