oily waste treatment - intertanko waste.pdf · oil handling cost oily waste treatment ... for bilge...
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Oily waste treatmentINTERTANKOLondon, February 17, 2006
Johan AgrellProcess Analysis & Design
Alfa Laval Tumba AB
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Alfa Laval onboard
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Solution forBallast water cleaning
EcoStreamBilge water treatment
Solution forCrankcase gas cleaning
NFVBilge water treatment
MSPXOily sludge treatment
A growing environmental portfolio
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Why oily waste treatment?
• Environmental awareness
• Insufficient storage capacity
• Avoiding labour intensive handling
• Avoiding frequent and costly disposal
• Compliance with legislation
• Avoiding penalties and fines
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• All ships must have systems onboard ensuring that discharge contains < 15 ppm of oil
• Local authorities have stricter regulations
• In protected waters, stipulated levels fall well below 15 ppm
• Tougher legislation on the way?
Oily water discharge is associated with penalties and heavy fines
Marine legislation
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IMO rules for oily water treatmentPreviously: IMO resolution MEPC.60(33)
• Bilge water separators to be tested with a mixture of oil and water
After January 1, 2005: IMO resolution MEPC.107(49)
• Bilge water separators to be tested also with a stable emulsion
• Oil-in-water monitor to include a recording function for date, time, alarm and operating status. The recording of the operation to be stored for 18 month
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Oily waste in “real life”Alfa Laval has built up it’s knowledge about oily waste characteristics
Bilge water samples collected from bilge well
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Bilge water and oily sludge contain
Droplets of emulsified water/oiland
Ultra-fine suspended solids
Three-phase separation is key
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Definitions
Liquid
Dispersion
Emulsion
Suspension
Dispersedphase
Continuousphase
Liquid
LiquidParticles
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Particulatesolids
Surfactants
Polymers
Surface charge
Stabilizing factors
Formation of small dropletsA prerequisite for creation of stable emulsions
Complicates separation
Dispersants
Probability
HIGH
YES
LOW
NO
Small particles Detergents
and soaps
The oily waste challenge
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Chemicals in the engine room
Cleaning &maintenance
Fuel oiladditives
Lube oiladditives
Chemicals forwater treatment
Acidcleaners
Alkalinecleaners
Petroleumcleaners
Boilerwater
Coolingwater
Seawater
Evaporators
Potablewater
Bilgewater
Dispersants
Corrosioninhibitors
Ash depositremovers
Soot & scaleremovers
Pour pointdepressants
Dispersants
TBNreserve
Corrosioninhibitors
Compatibiltycontrollers
Anti-wearagents
Anti-oxidants
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OIW emulsion stability
Droplet size (microns)
1 10 100
oil
Stokes’ law
Vg : gravitational settling velocity [m/s]d : particle diameter [m]ρp : particle density [kg/m3]ρl : liquid phase density [kg/m3]η : liquid phase viscosity [kg/ms]g : gravitational acceleration [m/s2]
d ( - ) 18V =g gp l
2d ( - ) 18V =g gp ld ( - ) 18V =g gp l
2
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Alfa Laval’s oily waste treatment portfolio
EcoStream Bilge water treatment
Heavy dutycentrifuge system for demanding applications
MPEB Bilge water treatment
Uniquely simplegeneral purpose multi-phase emulsion breaker
MSPX Waste/Sludge treatment
Substantial savings in total sludge and waste oil handling cost
Oily waste treatment
Bilge water treatment
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Clean drain
Main engine air cooler drainCooling fresh water, sea waterSteam drain
Bilge waterholding
Bilge water settling
LO sludge
FO sludge
Waste/Slop oil
Drains & leaksTank overflows
Bilge wells
Over-board
MSPX
EcoStream
MPEB
Drains & leaksCleaning &
maintenance
Purifers Purifers
Oil pump drainsCompressed air drainsWorkshop drains
Recoveredoil
To boiler/incinerator
Oily waste treatment process
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Upstream to downstream
Fuel and lube oil Oily sludge Bilge water
Oil continuous Water continuous
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Upstream to downstream
Oil continuous Water continuous
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Tank design and managementFor bilge water and oily sludge/slop/waste oil
Settlingtank
Settledtank
Oil skimming Oil skimming
Sludge drain
To treatmentHeat
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MSPX systemOil Recovery and Sludge Treatment
Features
• Decreases sludge treatment cost
• Reduces sludge volume by 90%
• Separates water to bilge water system
• Recovers oil to be used in boiler or incinerator
• Reduces man-hours for sludge handling
• Handles oily sludge of varying composition and density without adjustment
• Designed for high solids contents
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Examples
Field test results
Separated SeparatedInstallation Type Feed oil water
Oil (%) Water (%) Water (%) Oil (%)
M/S Oihonna Roro 1 99 15 0.02
M/S Diana II Ferry 6 94 15 0.5
M/S Peter Wessel Ferry 54 46 14 0.1
M/S President Lincoln Container 70 30 4 –
M/S Mariella Ferry 86 14 3 0.1
Ålands Power Plant Power station 97 3 1 0.2
M/S Dronning Ingrid Ferry 98 2 0.4 0.2
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EcoStream bilge water solutionSinge-stage separation of solids and oil
• Superior separation efficiency
• Breaks most stable emulsions and suspensions by removing micrometer-sized contaminants
• High solids tolerance
• Unaffected by sea heave
• No adsorption or membrane filters required
• Minimal reject
• Fully automated
• Unaffected by oil shocks
IMO Approved Centrifugal Bilge Water System, MEPC.107(49)
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Typical system layout
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Tested under harsh conditionsMixtures of:
• Water• Seawater• Fresh water
• Oil• HFO• DO• Hydraulic oil
• Chemicals• Detergents• Additives
• Solids• Soot• Rust
Performance has been proven for extended times of operation with less than 10 ppm oil in effluent.
No adsorption filter is required.
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Typical effluent characteristicsFeed-back from field installations
• Results well below 15 ppm, normally < 5 ppm
• Chemicals not needed
• Separation temperatures of 60-70 °C
feed effluent
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MPEB bilge water systemsfrom Norddeutsche Filter Vertriebs (NFV)
IMO Approved Multi-Phase Emulsion Breaker, MEPC.107(49)
Features
• Patented Multi-Phase Emulsion Breaker technology
• No chemicals needed
• Continuous cleaning without backflushing
• No adsorption or membrane filters required
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Two-stage separationMulti-Phase Emulsion Breaker (MPEB)
MPS MESB
Stage 1 Stage 2
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Oil-in-water monitorDeckma OMD-2005
• Certified acc. to IMO resolution MEPC.107 (49)
• Continuously monitors ppm value of cleaned water
• Continuously displays ppm value
• Automatically recirculatescleaned water exceeding 15 ppm back to bilge tank
• Stores values for 18 months
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Efficient waste treatment
KNOW-HOW:
Oily waste chemistry
KNOW-HOW:
Oily waste management
• Process design
• Upstream and downstream conditions
• Understanding of how emulsions form and break down
• Selection of chemicals
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HousekeepingFuel tankFuel oil
sludge Boiler
Incinerator
Ashore
Lube oilsludge
Treatment
Overboard
Recycle?
Heavilypollutedwater
Condensateetc.
Treatment
Chemicals- QSDs- Additives- Effectiveness?
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Concentrated solids
Reduced chemical usage
Performance-driven development
Focus on “back-end” processes
Closed loops, re-utilisation & self-
containment
Minimised leakages
Reduced oil losses
Reduced water consumption
Process vision Equipment vision
WasteWasteminimisationminimisation
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Future outlook
• Further offloading restrictions, increasing costs
• Enforced legislation, “0 ppm”
• MEPC.”future” and more sophisticated OIW monitors
• Environmental awareness
• “New thinking” in the engine room
• Waste-efficient equipment and solutions
• Integrated process approach to the engine room
• Automation – less labour intensive solutions
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Our corporate mission
To optimize the performance of our customers’ processes. Time and time again.