Swedish company Marinfloc has initiated delivery of combined EGR bleed-off and Bilge water separators for a major South Korean newbuilding project, having handed over three of a total of 12 shipments for the 16,200 TEU methanol-powered vessels.
ABS, Lloyd’s Register, DNV and MAN Energy Solutions have approved Marinfloc’s solution, which also complies with MEPC.107(49) and MEPC.307(73). All 12 vessels will be using a MAN B&W 8G95ME-C10.5-LGIM-EGRTC engine equipped for methanol fuel and will employ a Marinfloc CD5.0 EGR system to treat both the EGR bleed-off water and the bilge water.
The flocculation technology utilised by the Marinfloc treatment unit is believed to be effective in terms of both treatment efficiency and cost, regardless of the type of fuel burned. The delivery is the first for methanol-fuelled vessels but several units have been delivered to date for other systems with the first vessel in operation since early 2022.
The systems are said to be competitive both in Capex and Opex for EGR bleed-off and Bilge treatment. Exhaust Gas recirculation (EGR) is used to reduce NOx as per the Tier III requirements when used with compliant fuel. The EGR process will generate bleed-off water that must be treated to <15 ppm, which is also the requirement for bilge water. By combining the two treatment systems, Capex is significantly reduced – with no negative impact on performance. Additionally, there is a reduction in Opex as maintenance, spare parts and training are needed for only one unit.
The system is based on Marinfloc’s flocculation technology with thousands of references worldwide. The WhiteBox is included as standard to segregate the waste streams, eliminate cross-contamination, and record all activities. WhiteBox fulfils Exxon requirements and is Marinfloc’s recommendation for all vessels calling in the US.