Subscribe to our Mailing Lists (It's free!)
Tuesday, July 15, 2025
SAFETY4SEA
  • Home
  • Safety
    • All
    • Accidents
    • Alerts
    • Loss Prevention
    • Maritime Health
    • Regulation
    • Safety
    • Seafarers
    • Security
    2024 IMO Bravery Awards honor tanker and tugboat crews for heroic acts

    Officer to receive IMO bravery award for saving 12 crew members

    Panama

    BMA: Sanctions imposed against Russia

    Work,Safety,Concept.,Wooden,Cube,Blocks,With,Icon,Of,Safety

    DNV: Key IMO safety developments

    seafarers

    Philippines DMW issues call to protect seafarers from warlike areas

  • SEAFiT
    • All
    • Intellectual
    • Mental
    • Physical
    • Social
    • Spiritual
    friendship

    Exploring the human need for friendship: A lifeline at sea and on shore

    neck pain

    Neck pain: A growing health concern for maritime workers

    Book Review: Building leaders the MMMA way

    Book Review: Feel grounded and think positive in 10 simple steps

    time

    Stay SEAFiT: Time is non-renewable – invest it wisely

  • Green
    • All
    • Arctic
    • Ballast
    • Emissions
    • Fuels
    • Green Shipping
    • Pollution
    • Ship Recycling
    • Technology
    ammonia bunkering vessel

    Company orders ammonia bunkering vessel for use in Singapore

    WSC

    WSC proposes alignment of EU ETS with IMO Net Zero Framework

    IMO Council World Maritime Day

    IMO: World Maritime Day two-year theme to take policy to practice

    BIMCO FuelEU Maritime Regulation

    EU issues low-carbon hydrogen fuel standards

  • Smart
    • All
    • Connectivity
    • Cyber Security
    • E-navigation
    • Energy Efficiency
    • Maritime Software
    • Smart
    vr training

    Companies team up for virtual reality training to better prepare crew

    digital tools onboard

    Company signs for AI autonomous navigation system for PCTC fleet

    Trafigura, ZeroNorth join forces to advance decarbonization solutions

    Trafigura, ZeroNorth join forces to advance decarbonization solutions

    floating data centres

    New partnership to develop floating data center on retrofitted vessel

  • Risk
    • All
    • CIC
    • Detentions
    • Fines
    • PSC Focus
    • Vetting
    AMSA fine

    NorthStandard: Tips to avoid pollution fines in Turkey

    OCIMF

    OCIMF Annual Report 2025: SIRE 2.0 a welcome change for the industry

    USCG

    ABS PSC Report Q1 2025: 526 total vessels detained

    paris mou lists

    Paris MoU 2024 Performance lists

  • Others
    • All
    • Diversity in shipping
    • Maritime Knowledge
    • Offshore
    • Ports
    • Shipping
    • Sustainability
    • Videos
    China

    China lays out vision for smarter and greener shipping

    Sanctions Russia

    EU plans to impose new Russian oil price cap

    EU US

    US plans to hit EU and Mexico with 30% tariff starting August

    Dr. Rosalie Balkin

    Dr. Rosalie Balkin to receive IMO International Maritime Prize

  • Columns
    Career Paths: Syb ten Cate Hoedemaker, Maritime Battery Forum

    Career Paths: Syb ten Cate Hoedemaker, Maritime Battery Forum

    GSR Services: The Hong Kong Convention sets the rules for total ship lifecycle responsibility

    NorthStandard: Data sharing to drive technology and improve crew wellbeing

    GSR Services: The Hong Kong Convention sets the rules for total ship lifecycle responsibility

    GSR Services: The Hong Kong Convention sets the rules for total ship lifecycle responsibility

    Trending Tags

    • Anchor Your Health
    • Book Review
    • Career Paths
    • Human Performance
    • Industry Voices
    • Interviews
    • Maripedia
    • Maritime History
    • Regulatory Update
    • Resilience
    • Seafarers Stories
    • SeaSense
    • Training & Development
    • Wellness Corner
    • Wellness Tips
  • Events
  • Plus
No Result
View All Result
  • Home
  • Safety
    • All
    • Accidents
    • Alerts
    • Loss Prevention
    • Maritime Health
    • Regulation
    • Safety
    • Seafarers
    • Security
    2024 IMO Bravery Awards honor tanker and tugboat crews for heroic acts

    Officer to receive IMO bravery award for saving 12 crew members

    Panama

    BMA: Sanctions imposed against Russia

    Work,Safety,Concept.,Wooden,Cube,Blocks,With,Icon,Of,Safety

    DNV: Key IMO safety developments

    seafarers

    Philippines DMW issues call to protect seafarers from warlike areas

  • SEAFiT
    • All
    • Intellectual
    • Mental
    • Physical
    • Social
    • Spiritual
    friendship

    Exploring the human need for friendship: A lifeline at sea and on shore

    neck pain

    Neck pain: A growing health concern for maritime workers

    Book Review: Building leaders the MMMA way

    Book Review: Feel grounded and think positive in 10 simple steps

    time

    Stay SEAFiT: Time is non-renewable – invest it wisely

  • Green
    • All
    • Arctic
    • Ballast
    • Emissions
    • Fuels
    • Green Shipping
    • Pollution
    • Ship Recycling
    • Technology
    ammonia bunkering vessel

    Company orders ammonia bunkering vessel for use in Singapore

    WSC

    WSC proposes alignment of EU ETS with IMO Net Zero Framework

    IMO Council World Maritime Day

    IMO: World Maritime Day two-year theme to take policy to practice

    BIMCO FuelEU Maritime Regulation

    EU issues low-carbon hydrogen fuel standards

  • Smart
    • All
    • Connectivity
    • Cyber Security
    • E-navigation
    • Energy Efficiency
    • Maritime Software
    • Smart
    vr training

    Companies team up for virtual reality training to better prepare crew

    digital tools onboard

    Company signs for AI autonomous navigation system for PCTC fleet

    Trafigura, ZeroNorth join forces to advance decarbonization solutions

    Trafigura, ZeroNorth join forces to advance decarbonization solutions

    floating data centres

    New partnership to develop floating data center on retrofitted vessel

  • Risk
    • All
    • CIC
    • Detentions
    • Fines
    • PSC Focus
    • Vetting
    AMSA fine

    NorthStandard: Tips to avoid pollution fines in Turkey

    OCIMF

    OCIMF Annual Report 2025: SIRE 2.0 a welcome change for the industry

    USCG

    ABS PSC Report Q1 2025: 526 total vessels detained

    paris mou lists

    Paris MoU 2024 Performance lists

  • Others
    • All
    • Diversity in shipping
    • Maritime Knowledge
    • Offshore
    • Ports
    • Shipping
    • Sustainability
    • Videos
    China

    China lays out vision for smarter and greener shipping

    Sanctions Russia

    EU plans to impose new Russian oil price cap

    EU US

    US plans to hit EU and Mexico with 30% tariff starting August

    Dr. Rosalie Balkin

    Dr. Rosalie Balkin to receive IMO International Maritime Prize

  • Columns
    Career Paths: Syb ten Cate Hoedemaker, Maritime Battery Forum

    Career Paths: Syb ten Cate Hoedemaker, Maritime Battery Forum

    GSR Services: The Hong Kong Convention sets the rules for total ship lifecycle responsibility

    NorthStandard: Data sharing to drive technology and improve crew wellbeing

    GSR Services: The Hong Kong Convention sets the rules for total ship lifecycle responsibility

    GSR Services: The Hong Kong Convention sets the rules for total ship lifecycle responsibility

    Trending Tags

    • Anchor Your Health
    • Book Review
    • Career Paths
    • Human Performance
    • Industry Voices
    • Interviews
    • Maripedia
    • Maritime History
    • Regulatory Update
    • Resilience
    • Seafarers Stories
    • SeaSense
    • Training & Development
    • Wellness Corner
    • Wellness Tips
  • Events
  • Plus
No Result
View All Result
SAFETY4SEA

Scrubbers – An economic and ecological assessment

by The Editorial Team
March 16, 2015
in Emissions
FacebookTwitterEmailLinkedin

 

Germany’s Nature and Biodiversity Conservation Union (NABU) announced the results of a study it says shows that “scrubbers are no solution to air pollution from ships.”

RelatedNews

Singapore tops global maritime center ranking for 12th straight year

UNCTAD: Global trade endures policy changes and uncertainty

The recent tightening of the fuel sulphur limits for fuel used in Sulphur Emission Control Areas (SECAs) requires the use of fuels with a maximum sulphur content of 0.1% in these regions, or a technology that can reduce emissions to an equivalent level, from January, 1st 2015. Most low sulphur fuels are distillates (e.g. marine gasoil MGO, which are more expensive than the residual fuels that are traditionally used by ships (e.g. heavy fuel oil HFO)). Exhaust gas scrubbers, in combination with the use of HFO, have been accepted as an alternative means to lower sulphur emissions.

Four different types of scrubbers are available today:

  1. Seawater scrubbers (open loop) utilize untreated seawater, using the natural alkalinity of the seawater to neutralize the sulphur from exhaust gases.
  2. Freshwater scrubbers (closed loop) are not dependent on the type of the water the vessel is operating in, because the exhaust gases are neutralized with caustic soda, which is added to freshwater in a closed system.
  3. Hybrid scrubbers give the possibility to either use closed loop or open loop technology.
  4. Dry scrubbers do not use any liquids in process but exhaust gases are cleaned with hydrated lime-treated granulates.

The scrubber market is highly dynamic at the moment, due to the recent tightening of the SECA fuel sulphur limits. The number of scrubbers installed on ships has increased significantly over the last years. About 80 scrubbers are installed at the moment, most of which are hybrid or open loop scrubbers. The number of orders amounts to approximately 300 at the time of writing. Available outlooks forecast a potentially more important role for scrubbers in the next decades as a means to reduce sulphur emissions, but at the moment the majority of ship owners have switched to MGO and investments have been postponed.

Objective

The study analyses environmental and economic aspects of the use of exhaust gas scrubbers in comparison to the use of MGO. Seawater scrubbers discharge different kinds of pollutants to the marine environment. Moreover, the study analyses the impacts of the pollutants on aquatic coastal ecosystems. The economic impacts are assessed for a 38,500 DWT product tanker.

Ecological impacts

Scrubbers reduce the emission of sulphur to the atmosphere by more than 90%. Also PM emissions, in terms of mass not number, are reduced significantly, by 60-90%. The emission of NOx is reduced by 10% or less. Due to the additional power needed to drive pumps and caustic soda consumption, the estimated additional GHG emissions range between 1.5 and 3.5%, including caustic soda consumption for the latter figure. It should be noted, however, that also the use additional MGO in the SECA causes an increase of GHG refinery emissions by roughly 6.5%.

Concentrations of hazardous substances in the discharge of closed loop systems are higher than in open loop systems, but the mass flow rate of these substances determines the environmental impact. This is larger in case of seawater scrubbers, which are not always equipped with discharge water cleaning systems.

The current dominance of seawater and hybrid scrubbers indicate that a large share of the pollutants captured in the wash water may be released to the sea water.

Although the IMO wash water criteria for scrubbers are generally met, scrubbers may have a negative impact on marine environment due to acidification, eutrophication and the accumulation of hazardous hydrocarbons and heavy metals in case dilution is limited. This may lead to a deterioration of the water quality. The long term impacts of the use of open loop scrubbers, especially in vulnerable coastal areas with a reported moderate water quality, therefore needs to be investigated systematically by measuring and modelling of the water quality. On the basis of such results, it should be evaluated if scrubbers can be used in accordance with the European Water Framework Directive and Marine Strategy Framework Directive that set maximum concentrations for certain hazardous pollutants, prohibit deterioration of water quality, and aim to achieve ‘good environmental status’ respectively. Few EU countries decided to ban the use of open loop scrubbers in their waters to protect against potential contamination.

The use of MGO or LNG is inherently cleaner than the use of seawater scrubbers because no contaminated wash water is discharged. Additional impacts of increased MGO production on land, apart from increased energy use, are expected to be limited, due to the stringent environmental legislation and enforcement.

Scrubbers’ business case

The installation of scrubbers requires significant investments. Typical installation costs range between 200 and 400 EUR/kW, which imply an investment of several millions, depending on a ship’s engine power.

It is difficult to draw firm conclusions on the profitability of using scrubbers, as this depends on the operational profile of the ship, the difference between HFO and MGO prices, and the time ships sail in SECAs. The fuel price difference between MGO and HFO ranged between 240 and 300 $/ton between January 2014 and February 2015. When the difference is high, scrubbers are profitable in more cases than when the difference is low.

Under optimistic conditions, ship owners may be able to offer services at relatively low prices, but consequently there is a risk that scrubbers may lead to higher transport costs for operators instead of lower. The annual depreciation costs of scrubber installations are relatively high in comparison to a ship’s annual hire costs, illustrating the significance and potential risk of the investment. Table 1 provides an overview of the impact of uncertain parameters on the annual benefits of scrubber installation.

NABU-impact-of-fuel-price
Impact of fuel price difference and number of days at sea (SECA) for a 38,500 DWT
product tanker

Due to the additional costs of caustic soda consumption, it is likely that hybrid scrubbers will be used in open loop where possible and that the number of freshwater scrubbers installed will remain limited.

To assess the cost and benefits for the society as a whole, the benefits for ship owners would need to be weighed against the potentially harmful impacts of scrubbers on vulnerable coastal ecosystems. Such an analysis is conditional to the availability of monitoring and modelling of the impact of scrubbers on the water quality and marine ecosystems.

For more information please read the report by clicking below:

NABU-scrubbers-cover

Source: NABU

In the start, I was open with you propecia before and after has changed my being. It has become much more fun, and now I have to run. Just as it is incredible to sit.

Scrubbers – An economic and ecological assessmentScrubbers – An economic and ecological assessment
Scrubbers – An economic and ecological assessmentScrubbers – An economic and ecological assessment
Tags: 2020 sulphur capHFOLNGMGOreportsscrubbersSECA
Previous Post

Clipper adds MGO tanks to meet new emission regulations

Next Post

Hazardous occurrence related to rescue boat surveys

SUGGESTED FOR YOU

ReCAAP ISC
Security

ReCAAP ISC: Half Yearly Report 2025, Piracy and Armed Robbery Against Ships in Asia

July 10, 2025
IMB piracy
Security

IMB: 50% increase in piracy incidents in first six months of 2025

July 9, 2025
Singapore completes blended methanol bunkering
Fuels

MPA Singapore: Preparing for a multi-fuel future

July 8, 2025
IMO Sulphur Cap Recap: Where we stand and what’s next
Emissions

ICCT: Reduction in sulphur limit is imperative

July 8, 2025
shipping
Accidents

AMSA: 5,625 marine incident reports during 2024

July 3, 2025
Republic of the Marshall Islands registry achieves new milestone
Accidents

RMI: 954 incident reports received during 2024

July 3, 2025

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Explore more

No Result
View All Result
MARITIME EVENTS

Explore

  • Safety
  • SEAFiT
  • Green
  • Smart
  • Risk
  • Others
  • SAFETY4SEA Events
  • SAFETY4SEA Plus Subscription

Useful Links

  • About
  • Disclaimer
  • Editorial Policies
  • Advertising
  • Content Marketing
  • Contact

© 2025 SAFETY4SEA

No Result
View All Result
  • Safety
    • Accidents
    • Alerts
    • Loss Prevention
    • Maritime Health
    • Regulation
    • Safety
    • Seafarers
    • Security
  • SEAFiT
    • Intellectual
    • Mental
    • Physical
    • Social
    • Spiritual
  • Green
    • Arctic
    • Ballast
    • Emissions
    • Fuels
    • Green Shipping
    • Pollution
    • Ship Recycling
    • Technology
  • Smart
    • Connectivity
    • Cyber Security
    • E-navigation
    • Energy Efficiency
    • Maritime Software
    • Smart
  • Risk
    • CIC
    • Detentions
    • Fines
    • PSC Case Studies
    • PSC Focus
    • Vetting
  • Others
    • Diversity in shipping
    • Maritime Knowledge
    • Offshore
    • Ports
    • Shipping
    • Sustainability
    • Videos
  • Columns
    • Anchor Your Health
    • Book Review
    • Career Paths
    • Human Performance
    • Industry Voices
    • Interviews
    • Maripedia
    • Maritime History
    • Opinions
    • Regulatory Update
    • Resilience
    • Seafarers Stories
    • SeaSense
    • Tip of the day
    • Training & Development
    • Wellness Corner
    • Wellness Tips
  • SAFETY4SEA Events
  • SAFETY4SEA Plus Subscription

© 2025 SAFETY4SEA

Manage your privacy
We use technologies like cookies to store and/or access device information. We do this to improve browsing experience and to show (non-) personalized ads. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
Manage options Manage services Manage {vendor_count} vendors Read more about these purposes
Manage options
{title} {title} {title}
No Result
View All Result
  • Safety
    • Accidents
    • Alerts
    • Loss Prevention
    • Maritime Health
    • Regulation
    • Safety
    • Seafarers
    • Security
  • SEAFiT
    • Intellectual
    • Mental
    • Physical
    • Social
    • Spiritual
  • Green
    • Arctic
    • Ballast
    • Emissions
    • Fuels
    • Green Shipping
    • Pollution
    • Ship Recycling
    • Technology
  • Smart
    • Connectivity
    • Cyber Security
    • E-navigation
    • Energy Efficiency
    • Maritime Software
    • Smart
  • Risk
    • CIC
    • Detentions
    • Fines
    • PSC Case Studies
    • PSC Focus
    • Vetting
  • Others
    • Diversity in shipping
    • Maritime Knowledge
    • Offshore
    • Ports
    • Shipping
    • Sustainability
    • Videos
  • Columns
    • Anchor Your Health
    • Book Review
    • Career Paths
    • Human Performance
    • Industry Voices
    • Interviews
    • Maripedia
    • Maritime History
    • Opinions
    • Regulatory Update
    • Resilience
    • Seafarers Stories
    • SeaSense
    • Tip of the day
    • Training & Development
    • Wellness Corner
    • Wellness Tips
  • SAFETY4SEA Events
  • SAFETY4SEA Plus Subscription

© 2025 SAFETY4SEA