Open-Loop Scrubber

+250 marine water treatment installations for closed-loop scrubbers

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Open-Loop to Closed-Loop Scrubber Conversion

Working with leading scrubber manufacturers, shipowners, and shipyards, LiqTech has many years of experience providing sustainable marine scrubber wastewater systems for closed-loop scrubbers.

Do you have a vessel equipped with an exhaust gas cleaning system (scrubber)? Do you want to be future compliant with IMO regulations and save the ecosystem?

We are ready to convert your open-loop scrubber into a closed-loop system or hybrid scrubber. It is a compliant solution, which allows vessels to operate on heavy fuel oil (HFO) and discharge clean water. With over 20 years of experience in the filtration industry and +250 marine scrubber wastewater systems installed, we can provide you with a sustainable marine scrubber wastewater solution for current and future compliance.

Open-loop scrubbers have been subject to a lot of debate, as they produce large amounts of wash water effluent, which is discharged into the sea, usually without any treatment. In open-loop mode, scrubbers discharge sulfuric wash water warmer than ambient seawater and contain suspended particulate matter, PAHs, and heavy metals. By converting into a closed-loop or hybrid scrubber with a water treatment solution, you can operate in zero-discharge mode (water reuse) or allow clean water for discharge without the pollutants that damage ecosystems and harm wildlife. Sludge and wastewater (bleed-off water) can be stored onboard and discharged shoreside.

Be future compliant with a LiqTech open-loop conversion solution.

The IMO is already working on an approved work plan focusing on harmonizing the rules for scrubber wash water discharges. Many countries in Europe, together with China, Singapore, United States, India, and many more, are banning open-loop mode.

Our expertise in the marine scrubber industry and wastewater filtration will help you make growth sustainable – both in relation to profits and the environment.

  • Future compliant with IMO regulations
  • Save the ecosystem
  • Operate in zero-discharge mode or discharge clean water
  • Work with marine and filtration experts
Contact LiqTech

Open-Loop Scrubber Bans

It is time to convert to closed-loop mode.

Many countries around the world are already banning the use of open-loop scrubbers in specific ports or territorial waters, including China, the United States, Singapore, France, Portugal, India, Spain, Egypt, Germany, Panama, Malaysia, Pakistan, UAE, Bahrain, Gibraltar, Belgium, Ireland, Scotland, Norway, Sweden, Lithuania, Bermuda and many more to come.

  1. Open Loop Scrubber Ban World Map Liqtech Water

Proven Solution

1 years of experience in the filtration industry
230 marine scrubber wastewater systems installed worldwide

Work with Filtration Experts

Why convert from open-loop to closed-loop

  • IMO regulations
  • Environmental footprint
  • Environmental image
  • Sustainability
  • UN Sustainable Development Goals
  • Closed-loop systems can spend more time in ECA zones and on port
  • Can use lower costing HFO (Heavy Fuel Oil) all of the time

Why choose LiqTech Water

  • Many years of experience with treatment development for scrubber applications
  • Years of experience in installations and commissioning onboard vessels
  • Have in-housing specialists regarding open/closed-loop scrubbers and WTU
  • Complete production setup
  • Marine experienced project managers
  • References with all significant marine companies
  • Worldwide service setup
  • End-to-end qualified professionals
Liqtech Marine Scrubber Wastewater Filtration Process

Filtration Process for Marine Scrubbers

With a LiqTech open-loop conversion solution, our marine scrubber wastewater system will treat the wash water from the scrubber tower, and then it is sent back to the scrubber tower for reuse. This enables the scrubber to run in a closed-loop mode with no wastewater discharged overboard. Instead, the SOx particles are filtered and concentrated in our silicon carbide membranes and further dewatered in a filter press or liquid sludge, providing bulk dry/wet waste discharge to a waste handling station while in port.

Liqtech Modular System Design For Open Loop Scrubber Conversion

Modular Design for Flexible Installation

Our solution is perfect for retrofits and new builds due to the modular system design. If you want to increase capacity after installation, it is easy to add more systems if needed.

  • Separation of filter skid for ease of installation
  • Possibility to increase capacity
  • Low maintenance

Do you need more information?

If you need more information about our marine open-loop scrubber conversion, please do not hesitate to contact us.

We are ready to help you