Global engineering firm Goltens Green Technologies has completed the installation of a US Coast Guard (USCG) approved ballast water treatment (BWT) system on-board the Royal Netherlands Navy's platform docking vessel Zr.Ms. Johan de Wittlanding.

The 28,395GT, 176m-long naval vessel has been equipped with two units measuring 1500m³/h and 500m³/h respectively, which were provided by Norwegian boat dealer Optimarin.

Installation of the units was carried out at the Navy Yard in Den Helder, the Netherlands.

Goltens project manager Maarten Romijn said: “Space on this vessel was at a premium, so, after thorough 3D scanning, we exploited the modular nature of the Optimarin system to plan for an optimal installation, before starting pre-fabrication of the piping and electrical components.

“We then made a large transport opening in the ship’s hull to move the system and all related parts into the pump room.”

The project is part of three contracts awarded by the Defence Materiel Organisation to Goltens’ Green Technologies business unit in May last year.

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The scope of the project involved the installation of 16 Optimarin Ballast Systems (OBS) on ten of the navy’s vessels.

"We now have a BWT system that meets the Royal Netherlands Navy demands; we look forward to emulating the success of this project on upcoming installations."

OBS became the first BWT system to achieve complete USCG approval in December.

Royal Netherlands Navy project manager Roy van Kruisbergen said: “We’re focused on optimising both the flexibility of our fleet and their environmental performance.

“We now have a BWT system that meets the Royal Netherlands Navy demands; we look forward to emulating the success of this project on upcoming installations.”

The BWT systems feature a combination of automatic back flushing, self-cleaning filters and powerful 35kW ultraviolet (UV) lamps, and have the capacity to neutralise all potentially invasive species in ballast water.

Image: The Royal Netherlands Navy’s HNLMS Johan de Witt. Photo: courtesy of Goltens Worldwide Management Corp.