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Exhaust Gas Recirculation system on a marine vessel
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Protection of Water Systems
Exhaust Gas Recirculation (EGR)

Ultrafiltration Solutions for EGR

BOLLFILTER offers customized filtration solutions for Exhaust Gas Recirculation (EGR) that effectively remove sulfur and particles from bleed-off water, safeguarding diesel marine engines. The BOLLFILTER FineFilterUnit, based on its advanced ultrafiltration ceramic membrane technology, is a fully automated system that cleans bleed-off water, collecting suspended particles as concentrated sludge or solid components. This solution provides reliable and efficient EGR treatment, ensuring optimal IMO discharge compliance.

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Membrane filtration in compliance with regulation for bleed-off water – IMO MEPC.307(73)

The BOLL FineFilterUnit complies with the regulatory guidelines for the treatment of EGR wastewater - IMO MEPC 307 (73) for Everllence and WinGD engines. The membrane system ensures that the oil content in treated water is consistently below 5 ppm, meeting all necessary current requirements. Trust in our proven track record of successful tests directly at customer sites and more than 150 FineFilterUnits sold.

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Our membrane system is also suited for Exhaust Gas Cleaning Systems (EGCS) according to the IMO MEPC.259 (68). 

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Advantages of the BOLL FineFilterUnit in EGR application

Advantages for engine manufacturers:

Marine engine builders integrating the BOLL FineFilterUnit (FFU) into the EGR system can benefit from the following:
 

  • Any required EGR waste water requirements according to general technical data of Everllence or WinGD (Winterhur Gas & Diesel) can be met
  • Low capital expenditure (CAPEX) costs
  • Flexible design for straightforward installation within the engine compartment
  • Reliable compliance with regulatory treatment standards
  • Suited FFU systems for desired bleed-off flow
  • Fast and reliable availability
     

Everllence engines

Removal Rate:

>97% Turbidity [NTU]
>99% TSS [mg/L]
  98% Oil [mg/L]

WinGD engines

Removal Rate:

>99% Turbidity [NTU]
>99% TSS [mg/L]
  86% Oil [mg/L]

Advantages for Shipowners:

  • Applicable for all ship type
  • Simple and safe handling for both operation and maintenance
  • Standard communication by preferred solutions like Siemens PLC
  • Compact, space-saving design
  • Less waste water volume
  • Fast and reliable availability during operation
  • Low operation costs
BOLLFILTER FineFilterUnit

Filtration technology comparison

Characteristics of different filtration technologies

  Dissolved Air Flotation Centrifugal Separator BOLL Membrane Filtration
Polishing steps required 2, Chemical and physical 2, Chemical and physical None (membrane as physical barrier)
Separation dependence from density, temperature and water composition Yes Yes No
Replacement of filter elements Regularly Regularly Not regularly
Chemicals required for separation Required, to increase the particle sizes for efficient floating Required, to increase the particle sizes for centrifugal separation Not required, Filtration based on size exclusion within the nanometer range
Separation dependence from chemical or physical parameters Impacted by water composition and dosing settings Impacted by water composition and dosing settings No dependence, 100% hard barrier, no particles with sizes greater than Cut-Off can pass
Separation above 23° roll angle Not possible Possible Possible

Exhibitions

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SMM

The SMM in Hamburg is an international trade fair for the maritime industry and offers an excellent opportunity for exchanging information and developing innovations and the latest products from the shipbuilding and shipyard industry. With more than 2,200 exhibitors and around 48,000 trade visitors from all over the world, SMM continues to hold its position as the world's leading trade fair for the marine industry.

Downloads
Brochure EGR
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Michael Hormes
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Michael Hormes
Director Business Unit Fine Filtration Technology

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