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.