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Article Date: 17th April 2013

Munters Condensation Control at AquaPri A/S

Dehumidifier Units - Dry Air - Condensation Control - Air Dehumidifier

Munters Food

Dry air from Munters dehumidifier enables Danish fish slaughterer to fulfill the strict HACCP demands.

As a manufacturer of food products the HACCP regulation is one of many challenges. Visible condensation droplets on the ceiling can lead to fines and closing down of production. If not solved, the manufacturers live with manual and expensive removal of the condensation, with unplanned production stops for drying and with the threat of having the authorities requesting a full stop of production.

Aquapri A/S in Denmark was until recently one of many companies struggling with these issues.

Japanese Sujiho from Denmark
AquaPri A/S produces handpicked luxury seafood like eel, trout, trout roe and caviar. In their harvesting plant, AquaPri A/S, a large part of the trout roe is processed as Sujiko for the Japanese market. Sujiko is a Northern Japanese speciality, only consumed on or off the Hokkaido peninsular.

For proper Sujiko Aquapri’s Japanese customer have their own specialists working in the Danish plant from November to January which is the slaughter season. The roe is processed, salted, graded and packed in special packing of 5 kg for the Japanese market.

AquaPri has 15 inland trout farms and 5 trout farms at sea. Most of the large trout from 3 kg up to 5 kg are farmed at the sea farms off the coast of Denmark. Every year in April the trout are transported from the inland trout farm to sea. In November/December after 7-8 months at sea, the trout have tripled their weight and are ready for slaughter. In large well boats they are carefully transported to the harvesting facility. During a shorter season for other products in February/March the production is also running, for the rest of the year the facilities are closed down.

Trying to fight condensation
A huge amount of water is used during the processing and the creation of condensation in the slaughter facilities was a never ending challenge. Manual cleaning of the ceiling was done continuously and was still not sufficient to fulfil the strict HACCP regulations regarding condensation control.

AquaPri contacted Munters and a solution for eliminating the condensation problem was provided.

Munters Condensation Control
A desiccant dehumidifier type MXT7500 was installed with duct work for distribution of the dry air just beneath the ceiling. The Munters dehumidifier works with an airflow at 7,500m³/h and a humidity sensor placed under the ceiling controls the unit to keep the relative humidity below 60%RH.

In the short slaughter season, the factory runs in 2 shifts, after which the cleaning of the facilities starts. Prior to installation of the dehumidification system the drying after cleaning was incomplete and consequently the formation of condensation on the ceilings became a problem right after re-start of the production at 6.30 am.

Today the dehumidifier is in operation from right after final cleaning and already after 1-1½ hours of operation the facilities are dry.

Though the trout roe processing includes the use of large amounts of water, Munters dehumidifier MXT7500 prevents the critical condensation at the ceilings all through the 2 shifts.

Improved employees comfort as spinoff
Facility Manager Mr Jens Paag appreciates the improved hygiene within the production facility and so does the Japanese customer that imports more than 50% of the annual 400 tons of trout roe produced at AquaPri A/S.

HACCP regulations are fulfilled and as a nice spinoff the employees experience a significant improvement of the indoor climate conditions. As the air is no longer very humid and misty, they feel much more healthy with less coughing and discomfort.

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