concawe, ei, dgmk · 2017. 2. 17. · concawe, ei, dgmk workshop on microbial growth in fuel supply...
TRANSCRIPT
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CONCAWE, EI, DGMK Workshop on Microbial Growth in Fuel
Supply and Distribution Systems Brussels, March 16, 2011
Biological Problems in Captive Fleet Operations
Presented by:
Howard Chesneau &
Edward English Fuel Quality Services, Inc.
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Introduction
Andorra Czech Republic Hong Kong Japan New Zealand Slovenia Turkey
Australia Denmark Hungary Latvia Norway South Africa UK
Austria Estonia Iceland Lithuania Philippines South Korea USA
Belgium Finland India Luxembourg Poland Spain
Brazil France Ireland Malaysia Portugal Sweden
Canada Germany Israel Mexico San Marino Switzerland
China Greece Italy Netherlands Slovakia Thailand
• Industrialized countries are generally the largest consumers of crude oil
• Total World Production
– 85,472,000 bbl/day • Total World Consumption
– 85,534,000 bbl/day
Fuel Quality Services, Inc. (770) 967-9790
= Industrialized and Newly Industrialized Countries
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Introduction
Australia Finland Ireland New Zealand Spain
Austria France Italy Norway Sweden
Belgium Germany Japan Poland Switzerland
Canada Greece Luxembourg Portugal Turkey
Czech Republic Hungary Mexico Slovakia UK
Denmark Iceland Netherlands South Korea USA
• OECD member countries account for 2/3 of the daily global oil consumption (2007 ~54 MM bbl)
• During the 1990’s the demand for crude oil by the OECD only grew by 11% whereas demand in the non-OECD grew by 35%
Fuel Quality Services, Inc. (770) 967-9790
OECD – Organization for Economic Cooperation and Development
OECD Countries (30)
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Introduction
Fuel Quality Services, Inc. (770) 967-9790
• Developed economies use fuel more intensively than developing economies. For example:
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Introduction
• The United States and Canada use crude oil more for transportation than for heat and power
• For the rest of the OECD and non-OECD, the emphasis is on power and heat and much less on transportation
• The demand for crude oil is derived from the demand for the finished and intermediate products crude oil products
Fuel Quality Services, Inc. (770) 967-9790
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Introduction
Fuel Quality Services, Inc. (770) 967-9790
In the United States, 2/3 of the crude oil is used for transportation fuels and 1/3 is for power and other petroleum related activities
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Introduction
Fuel Quality Services, Inc. (770) 967-9790
U.S distribution of crude oil for transportation fuels
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Introduction
Fuel Quality Services, Inc. (770) 967-9790
Although the U.S. is the third largest crude oil producer, most
of the petroleum we use is imported.
Western Hemisphere nations provide about half
of our imported petroleum.
Net imports have generally increased since 1985 while
U.S. production fell and consumption grew.
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Diesel Fuel Sales 10 Year Average 1988-1997
Residential , 14.4%
Commercial, 7.5%
Industrial, 4.8%
Oil Company, 1.4%
Farm, 6.8%
Electric Power, 1.4%
Railroad, 6.3%
Vessel Bunkering, 4.5%
On-Highway, 47.7%
Military, 1.2%
Off-Road, 4.0%
3/17/2011 Fuel Quality Services, Inc., ® 9
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Diesel Fuel Sales 10 Year Average 1998-2008
Residential , 9.9%
Commercial, 5.3%
Industrial, 4.0%
Oil Company, 1.1%
Farm, 5.4%
Electric Power, 1.4%
Railroad, 5.4%
Vessel Bunkering, 3.3%
On-Highway, 59.3%
Military, 0.6%
Off-Road, 4.2%
3/17/2011 Fuel Quality Services, Inc., ® 10
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Changes in Diesel Fuel Sales1988-2008
1988-1997 1998-2008 Change
On-Highway 47.7% 59.3% +11.6
Residential 14.4% 9.9% -4.5%
Commercial 7.5% 5.3% -2.2%
Farm 6.8% 5.4% -1.4%
Railroad 6.3% 5.4% -0.9%
Industrial 4.8% 4.0% -0.8%
Vessel Bunkering 4.5% 3.3% -1.2%
Off-Road 4.0% 4.2% +0.2%
Oil Company 1.4% 1.1% -0.3%
Electric Power 1.4% 1.4% 0%
Military 1.2% 0.6% -0.6%
3/17/2011 Fuel Quality Services, Inc., ® 11
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Microbial Contamination of Fuel Storage and Distribution
4. Microbial contamination initiated when moisture and microbial spores enter refinery storage tank via the ventilation system. Stay time insufficient to remove water and microbes.
2. Microbes move along the distribution system.
3. The refining process sterilizes the fuel products
1. Microbes are present in crude oil.
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Movement of Microbial Contamination in Fuel Storage and Distribution
5. After refining fuel cools along the distribution system condensing water and microorganisms to form active pools/biofilms distributing microorganisms and their corrosive metabolites downstream to ASTs and USTs
6. Poor ballast stripping sends water and microbes with offloaded fuel.
7. Pipelines and storage tanks are contaminated from upstream product tenders,
Microbial Contamination of Downstream Retail Market
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External Sources of Contamination
– Ballasting of UST during installation
– Water contaminates USTs,
– PEI/RP100-2000
Installation of new UST:
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External Sources of Contamination
Steel Tank Institute: “Keeping Water Out of Your Storage System,” March 2004
H20
contaminants into tank
Existing UST
Rising/falling ground water
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Global Organizations That Acknowledge Impacts of MIC
Ground Transportation
• ASTM D975, ASTM D6751, ASTM D7467, ASTM D4814
Aviation
• ASTM D1655, ASTM Manual 5, IATA • Airframe (Boeing/Airbus) OEMs - Aircraft Maintenance
Manuals Military
• MIL-SPEC-53021
Industry
• API, CSA, DFOG, DOT, NBB, Oil Heat, PEI, STI, USEPA-OUST
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Source and Distribution of Microorganisms
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Microbial Contamination of Fuel Storage and Distribution
• Microbial Contamination Pathways
– Present in the environment soil
– Vents – Air, Water, Dust
– Tanks with Floating Roofs that Leak
– Ships Ballast / Seepage Water
– Transfer Piping
– Cross Contamination Between Fuel System Tankage
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Initiation of Microbial Contamination in Fuel Storage
Planktonic
Sessile
Consortia
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Conceptual Model of A Mature Biofilm Based on CLSM
Void
Streamer
Channel
Cell Cluster
Confocal Laser Scanning Microscopy – 3D Perspective
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Examples Contaminated Fuels
3/17/2011 Fuel Quality Services, Inc., ® 21
Gasoline
Aviation Fuel
Biodiesel (B20)
Diesel
Source: Fuel Quality Services, Inc.
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Examples of Fuel Microorganisms
Conidia - the “seeds”
Fungi Eukaryote
Bacteria Prokaryote
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Diesel Fuel Tank “Bug”Contamination
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Contaminated Strainer
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Fuel Storage and Distribution UST Microbial Contamination
3/17/2011 Fuel Quality Services, Inc., ® 25
Fill End
Pump End
Source: Fuel Quality Services, Inc., 8000 gallon distillate fuel tank interior view, circa 1988
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MIC Tank Corrosion
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Microbial Activity Water/Fuel Interface
3/17/2011 Fuel Quality Services, Inc., ® 27
Source: Fuel Quality Services, Inc.
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Biologically Contaminated Sock filter
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Examples of Filter Plugging
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Examples of Corrosion Saddle Tank Sumps
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Potential Biodiesel Quality Issues
Chemical By-Product Effect
Free Glycerin Corrodes non-ferrous metals, soaks cellulose filters, sediments on moving parts and lacquering resulting in filter clogging and Injector coking
Mono- & di- Glycerides Issues similar to glycerin
Free Fatty Acid Causes swelling of some elastomers, nitrile rubbers to soften, swell or harden and crack resulting in potential fuel leakage. Provides electrolytes and hastens the corrosion of zinc, salts of organic acids, organic compounds formed corrosion of FIE, filter plugging and sediment formation on parts.
Source: Diesel Fuel Injection Equipment Manufacturers Common Position Statement
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Potential Biodiesel Quality Issues
Chemical By-Product Effect
Methanol Carryover Corrodes aluminum & zinc, Corrosion of FIE low flash point
Process Catalysts Potassium and sodium compounds solid particles potentially blocking injection nozzles.
Source: Diesel Fuel Injection Equipment Manufacturers Common Position Statement
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Problems with B20 due to Out of Specification B100
3/17/2011 Fuel Quality Services, Inc., ® 33
Source: Fuel Quality Services, Inc.
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Unexplained Accelerated Corrosion in ULSD Systems
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Discussion
• Problems associated with accelerated corrosion of mild carbon steel in the fuel system several years after introduction ULSD September 2006.
• Issues originally identified by PEI and STI
• This investigation now under the auspices of Clean Diesel Fuel Alliance (CDFA) chaired by API.
• Issue discussed at ASTM workshop July 2010. Next work shop December 2011.
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Discussion
• CDFA has contracted with Battelle National Laboratory to conduct study:
– Task 1. Evaluate existing survey and historical field inspection data
– Task 2. Test the Working Hypothesis
– Task 3- Analyze results and develop conclusions
– Task 4- Prepare draft and final project reports
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Discussion
• Number of theories
– Mechanical/Electrical:
• Electrolysis from lack of proper grounding for submersible turbine pump (STP)
– Chemical:
• Presence hydroperoxides
• Excess corrosion inhibitor
• Lack of corrosion inhibitor
• ULSD vs. LSD
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Discussion
Fuel Phase Water Phase
Formate ppm
Acetate ppm
pH Conductivity uS/cm
Formate ppm
Acetate ppm
<0.3 30 - - - --
<0.3 35 4.5 22,000 260 19,000
• Number of theories
– Microbial
• Low levels of sulfur level <15ppm vs. 500ppm
• Aerobic vs. anaerobic microorganisms
• What we do know:
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ULSD STP Manifold & 4” Riser
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ULSD Column Pipe
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ULSD Column Pipe
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ULSD Pump Motor Assembly
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STP Reducer Fitting
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Close Up of STP Reducer Fitting
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STP Reducer with Carbuncles and Reduced Sulfur Potential for SRB?
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ULSD Corrosion Product
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ULSD Dispenser
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FE Petro Equipment
Old vs New
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Black “gunk” in tank
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Tank Bottom
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ULSD Fuel Tank ATG
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Encrusted ATG
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Sampling and Detection
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Sample Devices
Fuel Quality Services, Inc. (770) 967-9790
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Semi Quantitative Dip Slide
Fuel Quality Services, Inc. (770) 967-9790
• Used only for water samples. • The test is a plastic slide with a
nutrient agar to the growth of bacteria and fungi.
• The dip slide is inoculated with a water sample and monitored for growth during the incubation period.
• The numbers of colonies are estimated by comparing the dip slide to a chart.
• Done in-house and less expensive.
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Semi Quantitative Dip Pad
Fuel Quality Services, Inc. (770) 967-9790
• Used for fuel and water samples.
• The test is a plastic slide with a nutrient agar to the growth of bacteria and fungi.
• The dip pad is inoculated with a water sample and monitored for growth during the incubation period.
• The numbers of colonies are estimated by comparing the dip slide to a chart.
• Done in-house and less expensive.
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Dual Use Thixotropic Gels
• The MicrobMonitor2® is a semi-quantitative test used to detect aerobic microorganisms in fuel and water.
• The test consists of a clear nutrient gel in a rectangular glass bottle that contains an indicator.
• A known volume of sample is added to the test bottle and incubated.
• The test bottle is examined while incubation and colonies are counted
Fuel Quality Services, Inc. (770) 967-9790
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ATP Bioluminescence
• Rapid ATP Assay utilizes bioluminescence to quantify the concentration of ATP associated with the microorganisms present in fuel and fuel/water mixtures,
• The test results estimate the microbial load in samples of up to 1 liter fuel with a quantitative result in less than 10 minutes.
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Questions?
biological
biocide
water
fuel
testing
remediation corrosion MIC