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Reference project

Orkla Foods switched from chlorine dioxide to ozone

Water treatment .
Disinfection and sanitation
Orkla Foods AB
Kungshamn, Sweden
Food production
60 L/min flow-through at 1 ppm ozone residual


No chemicals and 80 % lower operating costs

Orkla Foods Sverige AB is a Swedish food manufacturer who is a part of the Norwegian company group Orkla. The group produces pickled fish and seafood, processed potato dishes, ready meals, fruit and berry products, pickled vegetables, ketchup, sauces and breakfast cereals.

Orkla Foods Sverige has 1,500 employees, 11 production sites and a turnover of over 500 million euros.

The main production in Kungshamn comprises Abba’s caviar, pickled herring and fish balls. The site has since long used ozone to sanitize process equipment and surfaces.

The problem.

In the 1990s, the facility in Kungshamn used large amounts of chlorine dioxide for disinfection of process equipment. The costs were high, over 10,000 euros per year, and they also experienced problems with chlorine gas emissions. The plant had repeatedly a need to evacuate and ventilate out chlorine. Thus chlorine dioxide treatment developed into a work environmental problem, and was replaced with an ozone sanitation system. Years later, upon increased production, the ozone system capacity became insufficient. This, together with lack of service from the supplier, meant that Orkla needed to find a new, future-proof solution.

The solution.

Orkla had previously a good experience of ozone purification and chose us at Mellifiq for a more developed and reliable solution. In 2016 we delivered a full-scale turn-key Ozonetech RENA Vivo high-performance ozone system whose modular design enables easy capacity increase.

The new Ozonetech system is fully automated and continuously adjusts the ozone concentration in the process water. Orkla also wanted to increase the reliability of disinfection further. Our Premium service agreement means we offer prolonged product responsibility. The agreement includes components and remote monitoring of the ozone system performance – enabled by O3Eye ™ – 24 hours per day, 365 days a year. Any deviations are reported automatically and directly to our service center. A premium service agreement means that we can supply a stable operation for Orkla on site.

During the commissioning of the system, we also got the opportunity to optimize Orkla’s operation. With ozone disinfection there is no longer a need for the final rinse. This has reduced the plant’s water consumption considerably and shorten the down time. The risk of recontamination through municipal rinse water has thus been eliminated.

Solution facts.
Mellifiq delivery
Ozonetech RENA Vivo B series Food & Hygiene solutions
Dimensions (HxWxD)
2,580 x 1,200 x 800 mm
Input power
1 kW
Noise level
49 dB


The new Ozonetech RENA Vivo high-performance ozone system has significantly lowered production down-time and water consumption. The total savings from our novel sanitation solution amount to 80%. The upgrade has improved environmental, safety and health standards and the plant operating staff appreciate the stability and safety aspects of the system.