Wärtsilä scrubbers for Dutch ro-ro carriers

'Bothniaborg' is one of the two Royal Wagenborg vessels to be fitted with Wärtsilä scrubber systems 'Bothniaborg' is one of the two Royal Wagenborg vessels to be fitted with Wärtsilä scrubber systems
Industry Database

Wärtsilä is to supply its hybrid scrubber systems to clean the exhaust emissions from two Dutch ro-ro carriers owned by Royal Wagenborg.

Wärtsilä’s Hybrid Scrubbers enable the use of either closed or open loop technology to remove SOx from the exhaust. When operating in open loop mode, exhaust gases enter the system and are sprayed with seawater. The sulphur oxides in the exhaust react with the water to form sulphuric acid. Chemicals are not required since the natural alkalinity of seawater neutralizes the acid. When operating in closed loop mode, the natural alkalinity of seawater is boosted by an alkali.

The hybrid approach enables operation in closed loop mode when required, for instance whilst in port and during manoeuvring using NaOH as a buffer. When at sea, the switch can be made to open loop using only seawater.

By installing Wärtsilä scrubber systems, Balticborg and Bothniaborg will comply with the regulations covering SOx emissions while using conventional residual marine fuel (HFO).

Balticborg and Bothniaborg are employed on a long term freight contract with Smurfit Kappa for the weekly shipment of paper products between Haraholmen, Bremen, Sheerness and Terneuzen. These operating routes fall within the Baltic and North Seas' Sulphur Emission Control Areas (SECA).

The vessels will be retrofitted with the systems in autumn of this year.

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