Diesel Particulate Filter

(DPF)

· Simple installation

· Reduces PM pollutant by 95% and Black Carbon (BC) emissions by an amount of 99%

· Allows a backpressure in the engine involving additional fuel consumption by an amount of 4%

· Requires regeneration techniques to remove the captured particles

[39]

Open-Loop Wet Scrubber

· Potential reduction of SOX by an amount of 98%

· Potential reduction of PM by 60%

· Allows the possibility to continue to use the cheaper bunker fuel instead of low sulphur fuel

· Subject to corrosion (seawater)

· Requires regular maintenance

· Requires additional electric power source

· Increase fuel consumption

· High cost

[40] [41] [42] [44]

Closed-Loop Wet Scrubber

· Potential reduction of SOX by an amount of 98% and PM by 60%

· Allows the possibility to continue to use the cheaper bunker fuel instead of low sulphur fuel

· Requires storage space to hold wastewater and hazardous chemical solutions

· High consumption of fresh water

· High cost

[40] [41] [42] [44]