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DESMI Ocean Guard

Optimized Ballast Water Treatment Systems

DESMI Ocean Guard develops compact ballast water treatment systems for the marine industry.

DESMI Ocean Guard develops compact ballast water treatment systems for the marine industry.

The company’s systems feature low-power consumption and reliable performance in challenging water conditions, with one of the smallest operational footprints in the ship industry.

Optimized ballast water treatment system

DESMI Ocean Guard systems can be easily installed without the need to relocate other equipment. The system combines small footprint with large flow rates, with only 3m2 required for a system with a 1,000m3/h, or 4,403 US gallons per minute (GPM) capacity, in addition to 0.84m2 for the electrical panel, which can be placed up to 100m away from the system.

Based on mechanical treatment, the fully automated CompactClean system eliminates the risk of hazards to the crew, vessel or the environment caused by chemicals or active substances. The first step of this process involves filtration, followed by ultraviolet (UV) treatment. For de-ballasting, the UV treatment is repeated but filtration is skipped.

CompactClean: If your vessels operate worldwide, you will need the standard CompactClean system. Chose CompactClean to achieve simplicity with One Global full flow mode for the whole world.
CompactClean OptIMO: If your trading pattern is mainly in IMO waters, then we recommend the CompactClean OptIMO solution. The CompactClean OptIMO is designed to utilise the fact that the IMO regulations uses the MPN test method for approvals, which is more suitable for UV systems.
CompactClean Bulker: If you have a bulk carrier, then consider the CompactClean Bulker Solution. To account for longer unload times than load times, the CompactClean Bulker de-ballast at an increased flowrate.

We offer three system variants, namely the CompactClean, CompactClean OptIMO, and the CompactClean Bulker.

The ballast water treatment system has no salinity or temperature limitations and features International Maritime Organization (IMO) and US Coast Guard (USCG) type approvals.

UV treatment for ballast water

The innovative shape of the UV chamber provides optimal performance. It has been developed using advanced Computational Fluid Dynamics (CFD) simulations. UV units are made of nickel-aluminium-bronze material with high seawater corrosion-resistance to provide a long lifetime.

CompactClean automatically adjusts treatment in challenging water conditions to avoid triggering alarms or interrupting port operations. This allows the vessel to continue port operations instead of making the vessel interrupt the ballast water discharge processes, saving costs caused by delays.

Integrated solution for ballast stripping operations

The system’s filter backflush pump can be used as a stripping pump for ballast tanks. This can be used as an alternative to ejectors, which can affect compliance with IMO and USCG discharge standards as untreated water is mixed with the treated ballast water.

Automated ballast water management with reporting

CompactClean uses a Programmable Logic Controller (PLC) and supports most standard communication interfaces.

As a fully automatic system, CompactClean can be easily integrated with existing systems to provide efficient operation. It is easy-to-use, with one button for starting ballast operations and one for discharging ballast water, available on the graphic touchscreen interface.

CompactClean can automatically create PDF reports for authorities and to document treatments, including key monitored parameters. Files are stored in the system and can be transferred to a USB memory stick through the electrical panel.

This function helps vessel owners meet increasing demands from authorities for documentation required by IMO conventions and USCG and Environmental Protection Agency (EPA) regulations.

UV water treatment for ships

DESMI’s CompactClean has a unique patent-pending shape that ensures a high dose of UV is applied in ballast water treatment.

This ensures that water is processed in accordance with IMO and USCG standards in adverse conditions with low UV transmission.

The CompactClean system is available in various sizes with a maximum flow rate ranging from 35m3/h (154GPM) to 2500m3/h (11000GPM).

IMO and USCG type-approved ballast water management system

CompactClean has IMO type approval according to the revised ballast water management system code and Lloyd’s Register standards. The system also has full compliance with USCG standards, meaning that it is approved for worldwide use.

The system has no minimum holding time limitation in IMO territory, and just 2 hours minimum holding time limitation in US Territory.

Accessible control panel for ballast water unit

The system is supplied with a main control panel that can be placed within easy access. It features a Human-Machine Interface (HMI) that is used to control the system and visualize alarms.

Operations can be controlled from a secondary screen in the deck control office or on the bridge if an optional remote screen is selected.

The range of standard fully automated treatment modes includes ballast, de-ballast, stripping, water filling and recirculation operations.

Operators can switch between screen views to display the relevant information and monitor component status during operation. Values such as temperature, pressure, flow, and UV intensity are displayed in real-time, along with trend curves to display development over time.

BWMS training

It is of utmost importance that the crew has been familiarised with water management systems and has enough knowledge to operate and maintain the system.


Systems must start up and run reliably and also treat the water in accordance with the IMO and USCG standards.

Small or big?

DESMI Ocean Guard now presents a line of new and smaller ballast water management systems (BWMS) that completes a full range of BWMS.

CMA CGM Benjamin Franklin Container Ship

Benjamin Franklin is the third in the series of Explorer-class container ships built by Shanghai Waigaoqiao Shipbuilding (SWS), a wholly owned subsidiary of China State Shipbuilding Corporation (CSSC), for CMA CGM, the world's third biggest container company.

Verified Savings on Installation Cost

Browsing various manufacturers of ballast water management systems (BWMS), you will quickly notice that there are many suppliers and many solutions, and all delivered at different price levels.

26 February 2021

Fayard Sign Frame Agreement for DESMI Ocean Guard A/S

Fayard shipyard in Denmark has signed a frame agreement to retrofit CompactClean Ballast Water Management Systems on its entire fleet with the Seychelles Petroleum Company Limited (SEYPEC) and German Tanker Shipping.

6 January 2020

DESMI Ocean Guard to Attend Europort 2017

Our team will be exhibiting in Rotterdam from November 7-10 and if you are curious about the latest developments and technologies in the marine market you should drop by the DESMI stand no. 4206. 

3 November 2017

DESMI Ocean Guard Launches New Ballast Water Management System

DESMI Ocean Guard is proud to announce the launch of its new CompactClean ballast water management system, which sets new standards for small footprint, reliable performance, and certainty of meeting both the international and US discharge standards.

14 September 2017

MPN Method for BWTS Testing Gains Global Support

DESMI Ocean Guard A/S is to appeal the US Coast Guard's decision to reject the Most Probable Number (MPN) method for type-approval testing of ballast water treatment systems (BWTS).

26 January 2016

DESMI Ocean Guard to Speak at BWMTech Conference

At the upcoming Ballast Water Management Technology (BWMTech) conference in London, DESMI Ocean Guard CEO Rasmus Folsø will be sharing experiences obtained with the US Coast Guard type-approval process of ballast water treatment systems.

6 November 2015

DESMI Ocean Guard Participating in Danish Maritime Fair Exhibition

DESMI Ocean Guard will be participating in the Danish Maritime Fair exhibition from 7-10 October. The exhibition takes place in the Bella Center in Copenhagen, Denmark, where DESMI Ocean Guard will display the RayClean system at stand no. B0-025.

6 October 2014

OxyClean Receives Class-NK Approval

DESMI Ocean Guard is pleased to announce that Nippon Kaiji Kyokai, the Japanese classification society Class-NK, has type approved our OxyClean™ ballast water treatment system.

18 June 2014

POSIDONIA 2014 and RayClean Type Approval

On 2-6 July, DESMI Ocean Guard will appear at the POSIDONIA 2014 exhibition. We look forward to meeting with our current and future clients, suppliers and anyone else who is interested in ballast water treatment.

30 May 2014

DESMI Ocean Guard at SEA-Japan 2014

On 9-11 April, DESMI Ocean Guard participates in the SEA-Japan 2014 exhibition in Tokyo. We look forward to meeting with our current and future clients, suppliers and anyone else who is interested in ballast water treatment. Please visit us in booth 2H-53, where we will display our products, including a RayClean UV-unit, capable of treating 300m³/h of ballast water.

1 April 2014
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