Arvia helps aquaculture production facilities remove persistent organic contaminants that remain after conventional filtration and biological treatment. Our technology delivers trace-level removal without chemical dosing or spent media waste, supporting improved product quality, biofilter protection and water reuse.
Aquaculture producers are under pressure to protect fish health, maintain product quality and manage increasingly complex environmental regulations. When trace organic contaminants remain in the system, they can create commercial pressure through off-flavour risk, extended purging cycles, sensitive stock management, treatment residue control and more complex reuse requirements.
Arvia is a global leader providing targeted tertiary water treatment for the contaminants that conventional filtration and biological treatment may leave behind. We specialise in geosmin and MIB removal for off-flavour control, residual medicine polishing for hatcheries and broodstock facilities, and sea lice treatment residue removal for offshore aquaculture operations.
Our patented Nyex™ technology combines adsorption with electrochemical oxidation. Contaminants are concentrated onto the media surface before being destroyed in situ, supporting trace-level removal without chemical dosing, routine media replacement or a spent carbon waste stream.
For aquaculture operators, this provides a practical polishing step for improving water quality control, protecting product value, reducing reliance on freshwater purging, supporting sensitive biological treatment stages and strengthening responsible discharge or reuse strategies. Talk to a specialist today.
Access specialist treatment for persistent off-flavour compounds such as geosmin and MIB, using a proven adsorption and electrochemical oxidation process designed for trace-level removal in challenging water matrices.
Target pesticide residues associated with sea lice treatment using advanced tertiary polishing for offshore aquaculture operations.. Arvia supports sites where conventional treatment is not achieving the required reduction.
Remove residual veterinary medicines and trace organics in hatcheries, broodstock and ZLD systems, with a low-maintenance treatment process designed to protect sensitive stock and support stable water reuse.
When persistent organic contaminants remain in aquaculture water, sites need targeted removal without adding complexity to the treatment train. Nyex™ is designed for this tertiary polishing role, supporting trace-level removal of recalcitrant organics where conventional treatment may struggle to achieve consistent results.
Nyex™ oxidises adsorbed contaminants within the reactor, rather than relying on bulk chemical dosing, reducing the risk of residual oxidants returning to the rearing tanks or disturbing nitrifying bacteria in the biofilter.
Our Nyex water treatment processes have been designed to tackle the wastewater issues faced by aquaculture operators, with these key benefits:
A Different Approach
Unlike conventional methods, the Nyex process combines adsorption with in-situ electrochemical destruction. Contaminants are concentrated onto the media surface then destroyed — not transferred to another waste stream. The media regenerates continuously, eliminating the saturate-replace cycle.
The Nyex™ process uses Arvia’s proprietary conductive media to attract and concentrate persistent aquaculture contaminants onto its surface. Once adsorbed, these organics are destroyed in situ through electrochemical oxidation, breaking down recalcitrant compounds rather than transferring them into a secondary waste stream.
Recalcitrant organic contaminants such as pesticides, medicines, geosmin and MIB are selectively adsorbed onto the Nyex™ media surface, concentrating them from the bulk water phase. This step is particularly effective at low influent concentrations, where conventional treatment technologies can struggle to achieve stable removal.
A low-voltage current is applied, oxidising the adsorbed compounds directly on the media surface. This destroys the target organics in situ, breaking them down into simpler, non-hazardous by-products rather than transferring them into another waste stream.
The oxidation step simultaneously regenerates the media surface, restoring its adsorption capacity during operation. This removes the need for frequent media replacement, off-site regeneration or secondary waste disposal, giving aquaculture operators a more practical, low-carbon and operationally simple alternative to conventional adsorption systems.
The Nyex system is typically deployed as a tertiary polishing step after filtration, biological treatment or other primary water treatment processes, targeting residual organics that conventional processes leave behind. It can also be used for targeted treatment where specific compounds need to be reduced before discharge, reuse or return to a recirculating system.
In RAS applications, Nyex™ can be configured as a side-stream tertiary polishing step, treating a controlled proportion of recirculating water without interrupting the main hydraulic flow. This supports integration into existing drum filtration, biofiltration and disinfection stages while allowing the unit to be isolated for maintenance or optimisation.
Pre-treatment
Upstream Process
Screening, solids separation, pH adjustment, filtration and flow balancing
Biological Treatment
Biological Stage
Reduction of bulk organic load, ammonia and biodegradable compounds, while persistent aquaculture contaminants may remain
Nyex™ Treatment
Arvia Solution
Adsorption and electrochemical oxidation to remove sea lice treatment residues, off-flavour compounds and other recalcitrant organics
Compliant Discharge
Output
High-quality effluent suitable for discharge compliance, water reuse objectives or improved process water management
We test your aquaculture water sample in Arvia’s laboratory to assess removal of the target contaminants and understand how the wider water matrix affects performance. Trials can evaluate off-flavour compounds, treatment residues, persistent micropollutants, COD reduction and other contaminants of interest.
A pilot plant can then be used to validate performance under live operating conditions. This helps confirm how Nyex™ responds to real-world variation in flow, contaminant load, salinity, temperature, background organics and water chemistry before full-scale design.
Pilot data informs a modular system design that can be integrated into the existing treatment train. Arvia provides technical support through installation, commissioning, operator training and ongoing optimisation to help maintain reliable performance over time.
Jerome Budin
Wastewater consultant
Schedule a trial to find out how we can help you reduce persistent aquaculture contaminents.
Arvia’s aquaculture wastewater treatment solutions are designed for water streams containing persistent organic contaminants such as sea lice treatment residues, veterinary medicines, geosmin, MIB and other recalcitrant compounds. Our technology targets the organics that conventional treatment may leave behind, supporting trace-level removal, water quality control and more responsible discharge or reuse.
