InTank® BWTS

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What is InTank®?

InTank® is an innovative Ballast Water Treatment System (BWTS) that treats ballast water in the tank, offering unrivaled options and opportunities for selecting hardware in terms of both size and type.

This state-of-the-art system also brings significant operational advantages to semi-submersible applications: heavy lift vessels, project barges, or drill rigs.

As the most advanced BWTS InTank® ensures confidence of compliance with the regulations with the least impact to vessel operations. InTank® is both USCG and IMO Type Approved as well as Class.

How does InTank® work?

InTank® is an advanced filterless Ballast Water Treatment System (BWTS) that allows vessels to ballast and deballast normally without the need for
additional power, crew, or vessel resources while in port. Treatment and neutralization is completed in ballast tanks typically while the vessel is at sea.

  • Circulation A small amount of ballast is drawn from a ballast tank, through the ballast main to a Dosing Module (DM).
  • TRO Measurement The DM measures the TRO (Total Residual Oxidant) value of the ballast water.
  • Dosing The DM then injects active substance Sodium Hypochlorite (Bleach) into the ballast, increasing TRO.

    • The Bleach can be produced onboard using Electrochlorination (EC) module of InTank® or dosed from bulk storage using the Bulk Chemical (BC) or FITT®/SuperYacht modules of InTank®.
    • Active substance dosing is stopped when the TRO target is achieved. Dosing then moves to the next ballast tank until all tanks are dosed.
  • Concentration Time InTank® uses Concentration Time (CT) as its treatment metric. Using CT means the TRO level is checked during the hold time, between 24 and 60 hours, again using a circulation of ballast from each tank.

    • If the TRO check shows low TRO (in the case of challenging water) more active substance will be added. InTank® is the only ballast water treatment system which automatically adjusts dose during treatment.
  • Final TRO Check At the end of the treatment time TRO is checked, again to ensure full treatment has been achieved – if not the ballast will be re-dosed or treatment time extended.
  • Neutralization Once treatment is recorded the system can complete neutralization. Using the same circulation and DM but this time injecting Sodium Thiosulphate (STS). Neutralization of the tank is recorded before discharge.
  • Automation Treatment and neutralization are both started by the crew with the processes controlled automatically. So, if on a long voyage or at anchor, treatment can be delayed controlling any regrowth potential etc.

InTank® Applications: Powerful and Versatile

InTank® is the go-to solution for a wide range of vessels, showcasing its versatility and effectiveness across various applications:

Bulk Carriers

from Handy to
Capesize

Tankers

from Product to Crude
Carriers, and LNG

Smaller Vessels

the FITT® is installed on PSV
and Research vessels

Super Yachts

SuperYacht offers a compact
design exclusively for super yacht applications

Semi-Submersible
Installations–The Superpower
for Semi-Submersible
Applications

Because treatment and neutralization is completed in the tank, a semi-submersible vessel can arrive on a project location with all tanks (full or partially full) recorded as treated and neutralized. This means the semi-submersible can complete its rapid in-place flood and drain operations without treatment, because the drain operation will only discharge fully treated or local water – allowed under the IMO Ballast Water Convention’s A3.5 Exception. In-line BWTS cannot do this.

Trusted by Vessel Owners Globally

Some of the world’s most iconic Heavy Lift vessels use InTank®, including The Mighty Servant I and Mighty Servant III,
the Blue Marlin and White Marlin, as well as project barges and drill rigs.

Black Marlin

Blue Marlin

White Marlin

Yamati

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