Ballast Water Management/Treatment System

Nowadays dramatic examples of the devastation caused by invasive species on the marine wildlife are all too easy to find. The most effective way to limit the spread of ballast water invasive species is to prevent their introduction.

The International Maritime Organization (IMO) introduced in 2004 the Ballast Water Code (BWC) to address the Control and Management of Ships’ Ballast Water and Sediments for all sea going ships greater than 400gt using ballast water.

The BWMC entered into force 8th September 2017. Ships are required to manage their ballast tanks to remove or render harmless the ballast water discharge of invasive species.

Wartsila Water Systems U.K.

Product Name: Aquarius UV


●IMO & USCG Type Approved System

●Flexible integration for retrofitting

●No active substances, no salinity limit

●Intelligent PLC control ensuring safe, automatic and economical operation

●Dedicated BWMS training program at Wartsila land and sea academy

●Explosion proof available for Zone 1 installations

Product Name: Aquarius EC


●IMO & USCG Type Approved System

●Flexible integration for retrofitting

●No salinity or temperature limits

●In situ safe, sustainable and economical disinfectant generation

●Efficient dosing controls, intelligent PLC control ensuring safe, automatic and economical operation

●Dedicated BWMS training program at Wartsila land and sea academy

●Explosion proof available for Zone 1 installations

■System structure


The primary business and product group is the NorWater Freshwater Makers. By the use of the Reverse Osmosis technology, these systems convert seawater to potable water for use on ships, rigs or onshore. There are more than 400 NorWater systems in operation worldwide, by major clients like Equinor/Statoil, BP, Seadrill, Odfjell Tankers, Sølvtrans, Rostein, Tassal and many more. These are supported by an efficient and competent after sales team in Norwater, with an increasing number of partners in a global network.

Why Reverse Osmosis as your source for fresh water?

Reverse Osmosis is a well-known process which has been under continuous development since the first experimental systems were introduced back in the 1950s. Reverse Osmosis systems from Norwater produce high quality potable water from sea water. Our products are proudly manufactured in Norway.

The Reverse Osmosis Technology

Reverse Osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove larger particles from drinking water. In reverse osmosis, an applied pressure is used to overcome osmotic pressure.
Reverse osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other effluent materials from the water molecules.
There are obviously pros & cons with various sources for freshwater supply for your vessel or rig. Norwater AS is product specialist for Reverse Osmosis only, but would still like to highlight some areas where a Reverse Osmosis system may imply added value versus alternatives.

●Easier installation (less piping)

●Reduced operational cost (maintenance, fuel consumption)

●Environmental legislations compliance

●Increased availability and flexibility

●Increased water quality control

●Low energy consumption

Water Quality Guarantee

The fresh water produced by NorWater Reverse Osmosis Systems is of high-quality potable water standard, exceeding requirements set by the WHO (World Health Organization) and NIPH (Norwegian Institute for Public Health).


●Compact design

●High grade materials

●Easy maintenance access

●High pressure pump specially designed for RO

●System design reducing operational cost

●Experienced supplier to offshore & navy, reflected in quality of products, documentation and customer service

●Increasing international network

●Small & dedicated company with flexibility, short decision lines and top customer service

Technical Water

The NorWater range also includes the additional feature to produce <<Technical>> or <<Utility>> water. This water is more pure than normal potable water (<10ppm) with different areas of application, like cleaning of chemical tanks as one example. The production of technical water is solved by a 2nd stage of membranes and the use of outlet water from 1st stage as inlet water to 2nd stage of membrane filtration. Norwater clients have included this product as part of a cost reduction program.

●Efficiency of latest design main engines

●Environmental legislations (Sulphur content in fuel)

●Cost efficient tank cleaning (e.g.: chemical carriers, special bulk cargo)

●Increased availability and quality of freshwater

●Increased flexibility and readiness of ships in spot trade

※Semipermeable Membrane
= The diffusion of water through a selectively permeable membrane that allows only certain particles to go through including water and leaving behind the solutes including salt and other contaminants

Manufacturer's website :
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