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 MAN and WinDG 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).

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 MAN 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

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

MAN 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]

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

Filtration solutions for EGR | BOLLFILTER

Brochure EGR

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Michael Hormes Head of Fine Filtration Unit

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