RAS technology works in fish farming by creating a closed-loop water system that continuously filters, treats, and recirculates water through fish tanks. This land-based approach controls water quality, temperature, and oxygen levels whilst removing waste through biological and mechanical filtration systems. The technology enables fish farming with reduced water usage and a lower environmental footprint compared to traditional flow-through and sea-based methods.
Introduction to Finnforel’s land-based trout farming approach
We at Finnforel are pioneering a new approach to aquaculture through our commitment to producing trout using advanced land-based recirculating aquaculture systems. Our mission centres on creating a complete production chain that spans from healthy roe to fillets, all within controlled environments designed to reduce resource consumption and environmental impact.
Our approach allows us to grow fish closer to consumers, reducing transportation distances and enabling same-day delivery of fresh products to retailers. This proximity to markets reduces transport-related emissions whilst ensuring maximum freshness for consumers. Discover more about our fish farming practices and how we’re transforming the industry.
The environmental characteristics of our land-based system extend beyond reduced transport. By eliminating the need for sea-based farming, we avoid risks associated with fish escapes, reduce pressure on wild fish populations, and reduce direct interaction with marine ecosystems. Our controlled environment also allows for measurable resource utilisation and waste management improvements.
What is RAS technology and how does it work in fish farming?
Recirculating aquaculture systems represent a distinct approach to fish farming that operates through a sophisticated closed-loop water management system. The technology continuously treats and reuses water, creating a controlled environment for fish growth whilst reducing water consumption and limiting direct discharge to the environment.
The core components of RAS technology include mechanical filtration systems that remove solid waste particles, biological filters that convert harmful ammonia into less toxic compounds, and UV sterilisation units that eliminate pathogens. Temperature control systems maintain optimal water conditions, whilst oxygen injection ensures adequate dissolved oxygen levels for healthy fish development.
Water quality monitoring systems continuously track parameters such as pH, dissolved oxygen, ammonia levels, and temperature. This real-time monitoring allows for immediate adjustments to maintain consistent growing conditions. The system typically recycles 95–99% of water, making it significantly more water-efficient compared to traditional flow-through systems.
| RAS Component | Function | Environmental Benefit |
|---|---|---|
| Mechanical Filtration | Removes solid waste | Prevents water pollution |
| Biological Filtration | Converts ammonia to nitrates | Maintains water quality |
| UV Sterilisation | Eliminates pathogens | Reduces disease transmission |
| Oxygen Injection | Maintains dissolved oxygen | Supports healthy fish growth |
Why is Finnforel’s land-based fish farming different from traditional methods?
Our land-based RAS approach offers measurable environmental differences compared to traditional sea-based fish farming by eliminating the risk of fish escapes and reducing direct interaction with wild marine ecosystems. The controlled environment prevents diseases from spreading to wild populations whilst avoiding the use of chemicals that might affect surrounding waters.
Traditional sea-based farming often requires transporting fish over long distances, contributing to carbon emissions and reducing product freshness. Our land-based facilities can be positioned closer to consumer markets, reducing transportation distances and enabling same-day delivery of fresh products.
The land-based production model we employ also allows for optimised feed conversion ratios within a controlled system, reducing the proportion of wild-sourced fish ingredients needed in feed. This reduces pressure on wild fish stocks whilst ensuring our trout receive precisely balanced nutrition for optimal growth and health.
Water usage represents another measurable difference. Whilst traditional flow-through systems require constant water exchange, our RAS technology recycles water continuously, using up to 99% less water than conventional flow-through methods. This water efficiency makes fish farming viable in areas where water resources are limited.
How does Finnforel ensure the quality and health of their trout?
We maintain consistent trout quality through comprehensive control over every aspect of the growing environment, from water quality parameters to nutrition programmes. Our controlled growing conditions eliminate many variables that can affect fish health in traditional farming systems.
Water quality management forms the foundation of our quality assurance programme. Continuous monitoring systems track dissolved oxygen, pH levels, ammonia concentration, and temperature around the clock. Any deviation from optimal parameters triggers immediate corrective actions to maintain consistent growing conditions.
Our nutrition programmes utilise high-quality feeds specifically formulated for RAS environments. We work closely with feed specialists to ensure our trout receive optimal nutrition that supports healthy growth whilst minimising waste production. This controlled feeding approach results in consistently high-quality fish with excellent taste and texture.
Health monitoring systems include regular fish health assessments, growth rate tracking, and behavioural observations. The controlled environment allows us to detect and address any issues immediately, ensuring our trout maintain optimal health throughout their growth cycle.
What characterises Finnforel’s production facilities?
Our production facilities, including the Varkaus Gigafactory and Hollola breeding centre, incorporate advanced energy efficiency measures and comprehensive waste management systems. These facilities demonstrate how modern aquaculture can operate at scale whilst managing resource consumption and byproduct handling.
The Varkaus Gigafactory produces 3 million kilograms of trout annually using state-of-the-art RAS technology. The facility’s design reduces energy usage through heat recovery systems, efficient water pumping, and LED lighting systems. Waste management protocols ensure that all byproducts are processed in line with applicable regulations, with solid waste often converted into fertiliser products.
Our Hollola breeding centre specialises in producing healthy broodstock and juveniles for RAS systems. This facility focuses on genetic selection programmes that enhance disease resistance and growth efficiency, contributing to the overall resource efficiency of our production system.
Integration with local suppliers, including feed production partnerships, reduces transportation distances and supports local economies. This approach aligns with our objective of reducing transport-related impacts whilst maintaining the highest quality standards. Contact us to learn more about our facility operations and resource management practices.
Choosing Finnforel’s land-based trout farming approach
Our RAS-based approach delivers multiple advantages including measurable reductions in water consumption, superior product freshness, reduced food waste, and significant local production benefits. These advantages position us at the forefront of modern aquaculture innovation.
Reducing environmental impact remains our primary operational focus, with our land-based systems eliminating risks associated with traditional sea farming. Our approach prevents fish escapes, reduces disease transmission to wild populations, and minimises chemical usage. The water recycling system conserves water resources whilst maintaining optimal growing conditions.
Product freshness represents another key advantage of our approach. Our brands LOHI and Saimaan Tuore deliver fresh trout products to consumers, with same-day delivery capabilities from production to retail. This freshness translates into superior taste, texture, and nutritional value for consumers.
Our expansion into international markets, including potential developments in Abu Dhabi, demonstrates the broad applicability of our land-based production approach. These projects showcase how RAS technology can bring fresh, locally-produced fish to markets worldwide whilst managing environmental impact through controlled, measurable production methods. Learn more about our production practices and how they’re shaping the future of aquaculture.
