In this animation, Scienco/Fast illustrates the parts of the Scienco InTank Ballast Water Treatment System (Scienco InTank BWTS).

0:14 Dosing Module
0:21 Electrochemical Generator
0:27 Dechlorination Module
0:34 Liquid Bulk Dosing Module (Optional)
1:00 Injection Nozzle

Scienco InTank Ballast Water Treatment System (Scienco InTank BWTS) is a ballast water treatment solution for time-critical, high ballast-dependent ships. This alternative, “second generation” solution elegantly provides treatment in the tanks during ship voyages and avoids operational and commercial risks for high ballast-dependent ships.

The best confidence of regulatory compliance with the least impact on vessel operations.
InVoyage + InControl = InTank

The ballast water industry has so far tackled this problem via treatment and disinfection of port water at intake – otherwise known as inline Ballast Water Treatment Systems (BWTS). About 90% of all cargo worldwide is moved overseas. Ships are designed to move cargo in the most efficient, cost-effective, and environmentally friendly manner. During a Port call, cargo is discharged or loaded. The weight of cargo loaded or offloaded needs to be compensated for various purposes: stability, maneuverability, optimal propulsion (draft, trim), and to counter stress factors on the hull.

Ships, therefore, ballast or de-ballast water in Ports. The required volume of water is displaced by a pump and or by gravitational forces into or out of specific dedicated ballast tanks. Port water contains the biological activity of marine species and pathogens. Therefore, treatment is required to avoid the introduction of invasive marine species and pathogens from one part of the world to another. The impact of the installation of ballast water treatment systems designed to treat water in Port, focusing mainly on cargo ships and the operational risks involved.

The currently available USCG and IMO-type approved solutions for the treatment of ballast water have been tested to meet discharge standards as set by regulatory bodies.
The solutions are based on in-line water treatment event(s) on intake and also at discharge in the case of UV systems (see table: USCG type approved list).
Cargo ships, especially the larger ships, are designed for longer voyages. Voyage duration may exceed the time period applied and adhered to during both land- and shipboard testing for Type Approval certification.

Technical compliance of a ship with an operable type-approved BWTS and the uncertainty may rise on actual biological compliance for longer voyages. Potential risk on regrowth of marine species and pathogens during longer voyages might risk unwanted results from ballast water sampling by Port State Control. Current Type approved BWMS all work around these fundamental aspects of treating ballast in port, in line. No Fully Type Approved BWTS on the market is designed to control and prevent regrowth on longer voyages quite like the Scienco InTank System.

The Scienco InTank ballast water treatment system based on recirculation and active total residual oxidant (TRO) monitoring also introduces the ability to control regrowth. Treating in the ballast tank during the voyage elegantly bypasses these fundamental issues and provides many benefits. The design solution, in principle, is simple and robust. When a vessel uses the Scienco InTank solution, water is taken up into the ballast tanks in Port without any treatment and no changes to the existing procedure. A small portion of ballast is circulated from one ballast tank at a time. This circulation loop provides the means of applying and mixing in oxidants. The oxidant used is sodium hypochlorite (NaOCL) or commonly known as bleach. NaOCL can be generated on board via an electrochemical generator or liquid bulk dosed. The circulation loop also enables monitoring of TRO levels inside each tank and a means for injection of a neutralizer solution prior to discharge. The consistency and successful inactivation of target organism and pathogens is verified by and controlled via an employed municipal wastewater treatment metric: Concentration-Time dosing (CT dosing).
 
The Scienco InTank solution does NOT require a filter mechanism. Port water taken in flows uninterrupted to the ballast tanks, distinguishing it from most conventional in-line systems. Due to the applied method of CT-dosing, Scienco InTank also inactivates larger species and pathogens, removing the requirement for pre-treatment, such as filters. A filter-free solution eliminates the risk of ballast inflow reduction or shutdown, a widely reported negative spin-off of in-line BWTS.

Treatment of ballast water whilst a ship is in transit with the Scienco InTank BWTS effectively eliminates many of the associated risks related to in Port treatment, especially for high ballast-dependent ships, such as cargo ships.

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