January 2, 2023

Cooling pelagic fish using OptimICE slurry ice machine while landing the catch

Aquaculture
Crab
Groundfish
Lobster
Onboard
Onshore
Pelagic fish
Poultry
Salmon
Scallop
Shrimp
Whitefish 
Picture of a ship at a port

A quality control study made by VSV fishery in Vestmannaeyjar show very good results using OptimICE slurry-ice machine while pumping the catch from a vessel to the processing plant.

Willum Andersen, Technical Operations Manager for the VSV Fishery, welcomed KAPP employees to Vestmannaeyjar and reviewed with them the good results from their QC study using KAPP technology for cooling while landing of catch.

“We have no doubt, the slurry ice keeps the temperature of the catch at freezing point  through out the landing process.”

Challenges VSV fishery faced to solve:

1) Maintain low temperature

When vessels dock, the RSW cooling is turned off leading to temperature rises in the catch and through out the landing/pumping process.

2) Seawater used was to warm

Seawater used to pump the fish from vessel to the plant is to warm.

3) Portable solution

Due to upcoming constructions at the plant, VSV needed a portable cooling solution that could be moved around the dock.

Part of a pelagic processing plant
Part of the pelagic processing line.

The KAPP solution:

1) To Maintain temperature by Cooling the blood fluid

When vessels dock, the temperature of the catch is around -1°C. When landing of catch begin, the RSW system is turned off in the Vessel, leading to that temperature rises to 4°C to 6°C in the catch (both fish and blood fluid) while pumping it onshore to the plant.

This can be a big problem when the pelagic fish is processed for a human consumption. Due to the capacity in our freezing plant it can take from 4-8 hours to finish the landing of the catch, compared to only needing 1-2 hours for landing the same catch by pumping it all into the fishmeal factory.

Blood fluid being cleaned and cooled with OptimICE slurry ice system before cooling the product.
Here you can see when the blood fluid is cleaned and cooled with OptimICE liquid ice before returning to the emulsifier to maintain the catch at around 0°C.

The KAPP solution

KAPP came up with the OptimIce Slurry-ice container solution to cool the seawater used to pump the catch onshore from the vessel. The seawater mixes blood fluid in a circulation pumping system and it is  cleaned and degreased and cooled down using slurry ice before the water is returned back to the vessel for further landing/pumping of the catch.

Results

Using the OptimIce Slurry-ice container VSV can maintain the cool temperature of the catch at 0°C in stead of it rises to 4°C to 6°C.The quality of the catch is much better and the gained low temperature prevents that a decay process can start in the catch.

Picture of the fishing vessel Huginn VE 55
Huginn VE 55 landing of mackerel catch in Vestmannaeyjar Iceland.

2) WARM SEAWATER COOLED DOWN

While landing the catch, as in the processing plant, VSV needs a lot of water  to pump the catch from one place to another. VSV decides to use seawater from boreholes for this and the problem in the summer time is that the seawater can be up to 10°C warm. Therefore by using this seawater the temperature in the catch rises and its quality decreases.

The solution

The solution is to cool the sea as it is pumped up with OptimICE liquid ice and then pump it into the circulation system that is talked about here in point 1). The same OptimIce machine is used to cool down both the seawater from the boreholes as the blood water in the vessel.

Results

By using OptimICE liquid ice we can cool the seawater from 10°C down to about 1.1°C.

OptimICE liquid ice container
OptimICE liquid ice container.

3) Portable liquid ice container

Due to the fact that VSV has planned to make significant changes to their processing plant building in the near future, it was decides to place the OptimICE liquid machine in a portable container, so it could be moved around their premises as needed from time to time.

Optimice BP-140 liquid ice machine

The liquid ice machine used at the VSV processing plant is very productive and its capacity is enough to produce slurry ice used to support landing of catch of several fully loaded vessels daily. The machine is producing 3-4000 liters per hour.If the performance needs to be increased then a reserve tank can be added or another machine placed into the container solution.

OptimICE BP-140 liquid ice machine
OptimICE BP-140 liquid ice machine.

Quality control results

Willum Andersen, Technical operations manager at VSV, says that every single fish we catch, process and deliver at VSV is of the highest Icelandic quality. Therefore we are very pleased with the new OptimIce Slurry-ice Container solution that ensures that the cool-chain never brakes from the fishing to the processing of their catch in their land based plants and factories.

Inspector Hiroki Igarashi and technical operations manager Willum Andersen, both employees at VSV
At VSV, inspector Hiroki Igarashi and technical operations manager Willum Andersen.

Samples are taken at all landings to assess the quality of the catch and to ensure that the complex and extensive processing system is always at its best. Therefore we can see clearly the good result from cooling with the OptimIce Slurry-ice solution and how it has met our highest expectations.

Mr. Hiroki Igarashi a Japanese QC inspector was taking several measures from the mackerel catch landed from Huginn VE-55 while KAPP employees were visiting. We got his test results shown in table.

A lot of effort is put into quality control and research at the VSV Processing Plant in Vestmannaeyjar.

QC Test results

Temp. in catch from Vessel

At  15:10 = 0.3°C

At  16:10 = 0.1°C

At  18:00 = 0.0°C

At  21:00 = 0.9°C

At  22:30 = 0.4°C

At  00:50 = 0.5°C

At  02:50 = 0.0°C

At  04:30 = 0.0°C

At  07:30 = 0.2°C

At  09:00 = 0.5°C

Average TEMP.

4.2°C without cooling

0.3°C with cooling

Seawater temperature

10.2°C during pumping

1.1°C after cooling

Heimir Halldorsson at a processing plant
Heimir Halldórsson sales manager at KAPP is very pleased with the results.

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Seafood Expo North America 2026

March 15–17, 2026 · Boston, USA

Thomas M. Menino Convention & Exhibition Center

Where the Cold Chain Never Breaks

KAPP will be exhibiting at Seafood Expo North America & Seafood Processing North America, the leading seafood industry event in North America.

Thousands of seafood professionals gather in Boston each year to connect, exchange ideas, and explore the latest innovations in processing, packaging, and technology.

Join us to discover how KAPP’s chilling, freezing, and processing systems protect product quality and extend shelf life. From the moment seafood is harvested until it reaches the consumer.

Innovation That Protects Quality

KAPP designs and builds advanced systems that ensure precise temperature control and uncompromised product integrity.

Our solutions are trusted worldwide for their efficiency, reliability, and sustainability across seafood, aquaculture, and food-processing industries.

Discover our key technologies:

  • OptimICE® Liquid Ice System – Rapid, energy-efficient cooling that keeps seafood at −0.5 °C / 31.1 °F without freezing.
  • RoteX™ Sub-Chilling™ & Thawing – Patented systems for sub-zero, no-ice chilling (down to −1 °C / 30.2 °F) and precise low-temperature thawing.
  • KAPP Skaginn Freezing Solutions – IQF tunnel and plate freezers operating at −36 °C / −33 °F for maximum yield and product integrity.
  • Kami Tech Systems – Stainless-steel and aluminum food-processing equipment and vessel maintenance, built at Pier 90, Seattle.

Meet the KAPP Team

With headquarters in Iceland and production in Seattle, KAPP delivers chilling, freezing, and processing systems backed by 90 years of engineering excellence.

Our global team provides complete service and support — ensuring the cold chain never breaks from sea to store.

Booth: TBA

March 15–17, 2026

Thomas M. Menino Convention & Exhibition Center, Boston USA

Website: seafoodexpo.com/north-america

This page will be updated.

Date:
March 15, 2026
Region:
North America
Industry

Pacific Marine Expo 2025

November 20–22, 2025 · Seattle, USA

Lumen Field Event Center

www.pacificmarineexpo.com

Where the Cold Chain Never Breaks

KAPP will be exhibiting at Pacific Marine Expo 2025, the largest commercial marine trade event on the U.S. West Coast.

Join us in Seattle to explore how KAPP’s refrigeration and food-processing technologies are shaping a more sustainable and efficient future for the marine and seafood industries.

Together with our team at Pier 90, Seattle, we deliver advanced systems that maintain product quality, optimize energy use, and ensure the cold chain never breaks — from catch to consumer.

Innovation That Delivers Efficiency

Learn how KAPP’s combined expertise is driving cutting-edge solutions for the North American market.

Our portfolio integrates decades of engineering excellence from Iceland and Seattle, offering systems designed to improve yield, quality, and environmental performance.

Discover our technologies:

  • OptimICE® Liquid Ice System – Rapid, efficient cooling that keeps seafood at −0.5 °C / 31.1 °F without freezing.
  • RoteX™ Sub-Chilling™ & Thawing – Precise sub-zero chilling and controlled thawing that protect quality and extend shelf life.
  • IQF Tunnel & Plate Freezers – Compact, energy-efficient freezing systems for maximum yield and product integrity.
  • Kami Tech Solutions – Stainless-steel and aluminum processing equipment and vessel services from Pier 90, Seattle.

About Pacific Marine Expo

Each year, thousands of commercial mariners from across the West Coast and Alaska gather in Seattle to explore new technologies, gear, and innovations.

The expo features hundreds of exhibitors, a three-day education program, and networking events — bringing together the people who power the maritime and seafood industries.

Booth #639

November 20–22, 2025

Lumen Field Event Center, Seattle, WA

Date:
July 26, 2025
Region:
Seattle, Wasthington, United State
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