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Turnkey Optimarin Ballast Water Treatment Retrofit


A leading seismic survey vessel operator selected Optimarin’s 334m3/hour OBS ballast water treatment system for one of its research vessels. Goltens had previously completed two successful retrofits for this owner and was awarded this retrofit as well. The timeline was relatively short with only a 3-month window between project kick off and completion of the installation.

  • Vessel Goltens installed Optimain BWTS aboard

    Research Survey vessel at shipyard in Stavanger

  • 3D model of Optimarin BWTS installation design by Goltens

    3D Optimarin system overview

  • Goltens delivers prefabricated pipe spools to vessel for Optimarin BWTS retrofit

    Prefabricated materials delivered to the shipyard

  • Prefabricated galvanized piping for Optimarin BWTS retrofit by Goltens

    Prefabricated galvanized piping

  • Goltens installation of Optimarin BWTS in Stavanger

    Installation of the BWT system

  • Goltens making required adjustments to deckplate supports

    Making required adjustments to deck plate supports

  • Goltens 3D model of Optimarin system overlaid on 3D scan data

    3D model overlaid on 3D scan data

  • Optimarin BWTS system installed by Goltens

    System installed onboard as modeled

  • Goltens 3D model of Optimarin system overlaid on 3D scan data

    3D Model overlaid on 3D scan data

  • Optimarin BWTS system installed by Goltens

    System installed on board as modeled


Having completed hundreds of ballast water retrofits on systems much larger with greater design challenges, Goltens was confident it could meet the deadlines. The scope was for a turnkey delivery inclusive of:

  • 3D scanning & vessel survey
  • Basic and detailed engineering
  • Class approvals
  • Procurement & Prefabrication
  • Project Management
  • System installation and Commissioning
  • Installation supervision


Goltens completed the 3D scanning onboard in a single day and delivered the baseline concept design to the client 11 days later. Moving quickly to get agreement on the conceptual design, Goltens design engineers delivered the detailed engineering less than 30 days later.

With roughly a month remaining prior to the planned start of the installation, Goltens moved quickly to acquire the necessary materials and prefabricate the pipe spools, brackets, valves and other materials and get them delivered to Norway.

Goltens deployed a Supervisor, an electrician and 3 pipe fitters to the vessel and completed the installation from end to end in only 15 days.

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