Ålands Water has taken a major step toward sustainable and efficient water treatment by upgrading its drinking water system with a reliable ozone solution from Primozone. The new installation ensures clean, safe, and great-tasting water for the entire island of Åland serving both residents and the large seasonal population during summer.

Located in the Baltic Sea, the Åland archipelago depends on high-quality water production to meet demand. The plant supplies 475 m³/h of drinking water to the population of Mariehamn and surrounding areas. To ensure stability and quality, Ålands Water replaced its old air-fed ozone generators with the Primozone GM18 system, known for its high ozone concentration, modular design, and energy efficiency.

The new system provides a continuous supply of high-quality water while removing algae, bacteria, and humus — substances that can affect both taste and safety. Part of the ozone from two Primozone GM18 units supports the flocculation process, significantly reducing the amount of chemicals needed in the filtration step. The rest of the ozone is used to create a strong barrier against viruses, algae, and parasites, ensuring superior water hygiene

At Primozone, we are proud to deliver advanced ozone technology to support sustainable aquaculture across Europe. One of our valued customers is Skagen Salmon, a land-based salmon farm located in Skagen, Denmark. They provide high-quality salmon to nearby markets with full respect for the salmon, the consumer, and the environment.

 A stable operation is essential to ensure an optimal environment for the fish. Reliable water quality and effective disinfection are key to maintaining fish health and production efficiency. To help achieve this, Primozone supplies ozone technology that supports a clean and balanced water system at Skagen Salmon.

 Our modular and adjustable ozone generators are designed to easily adapt to process requirements, ensuring optimum operation and flexibility. With a scalable design, our system can be adjusted to meet the exact capacity needed — maintaining consistent water quality while reducing environmental impact.

 By integrating ozone into the water treatment process, Skagen Salmon benefits from improved hygiene and a chemical-free disinfection method that supports both fish welfare and sustainability goals.

We at Primozone are proud to be part of this process and to contribute with our reliable ozone generator technology to ensure a stable, efficient, and environmentally responsible operation at Skagen Salmon.

The Birmensdorf Wastewater Treatment Plant, located in Switzerland, has been in operation since July 1973. It serves several municipalities, including Aesch, Birmensdorf, Bonstetten, Stallikon, Uitikon, Wettswil, and parts of Aeugstertal. As part of a long-term development plan extending to the year 2035, the plant underwent a significant expansion between 2013 and 2018. This upgrade increased its treatment capacity to serve up to 33,000 population equivalents.

In response to the revised water protection legislation in Switzerland, the Birmensdorf facility has recently been modernized with an advanced treatment stage specifically designed to remove micropollutants from wastewater. These substances, which include trace pharmaceuticals and personal care products, are increasingly recognized as environmental contaminants that conventional treatment methods cannot fully eliminate.

To meet these new requirements, the plant implemented ozone treatment—a proven and efficient method for advanced wastewater purification. Ozone, a powerful oxidizing agent, breaks down complex organic compounds and significantly reduces micropollutant concentrations.

The Swiss fish farm Valperca faced challenges with water quality in their recirculation system, which prevented them from producing fish at full capacity. By implementing the Primozone Ozone Water Treatment Solution, water quality improved within just a few days, allowing the farm to maximize production.

Located in the scenic Valais Valley, Valperca produces perch, a delicacy in Switzerland. The high market demand for perch, combined with limited wild supply, makes this fish highly valuable. Valperca has the capacity to produce up to 300 tons of perch per year.

“…the redox value increased instantly and after only a couple of days we had reached the desired water quality.”

In May 2010, Valperca contacted Primozone due to issues with the ozone system they had installed just months earlier. The previous system lacked sufficient capacity to maintain water quality for the designed fish volume. Water was not properly treated, redox values were too low, and the organic load in the tanks was too high, resulting in slower fish growth and limited production.

Livestock farming plays a crucial role in economic development across many countries. In Asia, livestock contributes significantly to agricultural growth by providing manure, fuel, and fertilizers, supporting rural livelihoods, food security, and local economies. However, livestock farming also comes with environmental challenges, particularly the harmful impact of untreated wastewater discharge on water bodies, soil quality, surrounding ecosystems, and overall biodiversity.

Characteristics of Livestock Wastewater

Livestock wastewater contains high levels of color, COD, BOD, nitrogen, and suspended solids. On a typical farm, large volumes of wastewater are produced daily. When discharged untreated, this water can severely pollute ground and surface water, threatening aquatic life, soil fertility, surrounding habitats, and the overall health of the local environment. To comply with environmental regulations and reduce ecological impact, farmers employ various technological solutions for wastewater treatment, including chemical, physical, and biological processes, tailored to the specific composition of the wastewater and the farm’s operational needs.

Customized ozone solution from Primozone proves to be the key to removing odor created by biodiesel plant in Lithuania.

Mestilla is an environmentally friendly producer of biodiesel made from vegetable (canola) oil. During the pressing process, a distinctive smell of hydrogen sulfide (H2S) is formed. This odor is a nuisance to the surrounding neighborhood as the plant is located in the densely populated port area of Klaipeda, Lithuania. Addressing this issue was critical not only for regulatory compliance but also for maintaining good relations with the local community.

Removal of H2S with Ozone

At the Mestilla plant, odor problems from hydrogen sulfide prompted a thorough investigation into possible solutions. The study revealed that ozone provided the most efficient and reliable solution. The adoption of ozone has significantly improved air quality and minimized complaints from nearby residents. 

Alternative methods, including scrubbers and bio-filters, were also evaluated. Scrubbers failed to resolve the odor issue, while bio-filters were less efficient and more costly compared to ozone.

EASY-TO-USE OZONE WATER TREATMENT SOLUTION AT SALMAR SMOLT HATCHERY

SalMar Settefisk in Follafoss, part of SalMar ASA, is one of the largest salmon producers in the world, with a production of 10 million smolts (fry) per year. When expanding its facility with a new RAS (recirculating aquaculture system), Primozone® was chosen to supply and design the complete ozone water treatment solution for the hatchery.

Preferred Supplier for Sustainable Aquaculture

The Primozone ozone system was specifically requested by both SalMar Settefisk and Nofitech, the designer of the RAS system, as they considered it the best available solution on the market.
SalMar already had a Primozone ozone installation at another hatchery and was aware of its advantages, while Nofitech, with 25 years of experience in designing land-based fish farms, understands the importance of a well-designed ozone water treatment solution.