Trojan Marinex

Water Treatment & UV Technology Expertise

Prior to entering the ballast water treatment market, we spent the better part of a decade researching, developing, creating and recreating. During this time we dissected oxidizing and non-oxidizing methods, identifying the various benefits and pitfalls of each. Our scientists and engineers have collaborated with the international community of experts, including scientists at universities in Canada and abroad.

Our contribution has not just been the development of clean technology that renders harmless (without the chemicals) invasive species in ballast water discharge, but also includes fundamental contributions to the understanding of the nature of the species present in ballast water, their susceptibility to treatment, the mechanisms of action against their viability, and the laboratory methodology by which efficacy and compliance can be determined.

Tested & Proven In Extreme Conditions

To ensure uncompromising reliability, we’ve employed integrity, efficiency, and accelerated life tests. We’ve pushed our filtration to the limit, using punishing mixtures of challenge water and marine mud, to provide you with deserved reassurance and peace of mind.

Intuitive Approach to Innovation

By identifying the inadequacies of off-the-shelf filters, and refining specific key features, we customized and engineered our solution with an industry-leading filter surface area, marine-tough construction, and an optimized automatic backwash process.

Larger Filter Surface Area

  • Continuous operation at required flow rate
  • Reduced risk of complete filter blockage
  • Less strain on filter
  • Contorting organisms are unable to squeeze through

Lengthened Filter Element

 32 Micron Filter Elements

  • Strengthened with both internal and external support structures
  • Constructed with premium duplex stainless steel
  • Larger Filter Surface AreaMeticulously assembled in a quality-controlled facility

Automatic Backwash

  • Reduced stress on filter elements
  • Reduces need to upgrade or install new ballast water pumps
  • Senses cleanliness of each filter element and adjusts backpressure accordingly

Here's how it works

  • Filter flush arm covers filter element
  • Flow is reversed, clean water flows back into filter element
  • Debris and backwash water is flushed out
  • Filter flush arm rotates to next filter element and procedure is repeated


Ultraviolet light (UV) can treat extremely turbid ballast water, as long as the system is engineered to the highest of standards.
Unfortunately, misconceptions about UV’s ability to treat poor quality water remain high. However, there is a long track record of utilizing UV disinfection to treat wastewater, and, in most cases, wastewater is of poorer quality or lower UV transmittance (UVT) than ballast water.

What is UV Transmittance (UVT)?

UV systems not designed for poor water qualities will have dark zones.

UVT is the ratio of light entering the water to that exiting the water. Simply put, water with high UVT (e.g., 90%) is relatively clear, allowing more UV light to reach the organisms you are trying to treat. As water quality decreases, the UVT is reduced (e.g., 50%) which in turn reduces the amount of UV light that is able to penetrate and provide treatment.

Every Port is Different

No matter where in the world your vessels trade – whether it’s clear seawater or turbid fresh water – your ballast water treatment system has to work. And, as you know, water quality varies from port to port and day to day.

Water quality varies from port to port.

Different water quality parameters become more or less important depending on the type of ballast water technology used. In the case of Electrochlorination systems, the salinity, temperature and organic content of the water will have a dramatic impact on the overall efficacy of the system. For UV systems, UVT is the most important parameter impacting the effectiveness of the system.

A High UVT Value Limits System Applicability

A conventional ballast water treatment system – utilizing a land-based-designed UV system (i.e., designed to treat drinking water with 85% UVT) – won't be able to provide the same treatment performance in lower UVT (e.g., 50%) water. More equipment would be required to provide the same level of performance, and more equipment means increased power draw and space requirements.

A high UVT value limits system applicability.

Many existing IMO Type Approved systems have been tested in higher clarity water (high UVT). It is expected that these systems will not be approved to treat lower clarity waters than to what they have been tested to under USCG regulations. The UVT value will be noted on the Type Approval certificate, significantly limiting the applicability of the system in poorer water qualities. In addition, alarms will be noted in equipment logs every time the UVT value of the ballast water falls below the minimum to which it was tested. Multiple alarms are likely to draw increased attention from Port State Control. The best way to reduce your risk is to utilize a ballast water treatment system that has been tested to low UVT values.

Dispelling the UVT Myth

The Trojan Marinex BWT system is tested and approved to one of the lowest UVT values in the industry, under full flow conditions. This dispels the myth that UV cannot be used in the poorest of water qualities.



The Maritime House is a unique maritime consultancy set up in Turkey housing Esko Marine , Alpha Marine Consulting Turkey and Nexus Maritime Istanbul

The Maritime House, Ağaoğlu My Office Lale Sok. No:1 Kat:13 Daire:54 Ataşehir, 34746 Istanbul / Turkey