Scalable, chemical-free phosphorus removal for industries and municipalities.
Polonite is a natural filter media designed for larger wastewater systems in need of reliable phosphorus removal. It is ideal for municipal wastewater treatment plants, industrial discharges, and decentralized infrastructure where effluent regulations are becoming increasingly strict.
Our Resources
Everything you need to plan, install, and maintain your Polonite® system
Straightforward guidance for public authorities, engineers, and installers working with decentralized or centralized phosphorus removal systems.
How it works
A Smarter Way to Remove Phosphorus
The system is based on adsorption, not chemical precipitation. Phosphorus is captured efficiently and retained in a plant-available form—ready for recycling. Each system is tailor-made to site-specific conditions, requiring no chemical additives, no pumps, and producing no additional sludge. This ensures a low-maintenance, passive, and circular solution to nutrient management.
What Polonite® Delivers in the Field
Tailor-made design for larger municipal or industrial applications
No chemicals or additives required
No additional sludge generation
Passive operation – no dosing, no pumping, no supervision
High phosphorus removal efficiency (up to 99% when fresh)
Long operational life – often several years before media exchange
Captured phosphorus remains plant-available, supporting circular use
Suitable for sensitive areas, compliance zones, or performance upgrades
Our experience
From academic innovation to proven impact
Polonite originated as a research innovation at KTH Royal Institute of Technology in Stockholm, where our team first developed and validated the media. Today, we operate as a spin-off company from KTH, maintaining a strong scientific foundation in everything we do.
15K+
UNITS
Systems installed
20+
COUNTRIES
Active in over 20 countries
30
MILLIONS LITERS / DAY
Treating more than 30 million litres of water daily
15
YEARS
Over 15 years of continuous field performance
12%
UPTAKE
Phosphorus uptake up to 12% by weight in laboratory settings
99.9%
Up to 99.9% reduction total coliforms
Case studies
Solving complex problems across all industries
Explore how our Polonite®-based systems deliver real-world impact—from decentralized sanitation to municipal and industrial-scale applications. Each project demonstrates our technology’s adaptability, performance, and environmental benefits.
Scientific research
Enclosure experiment in duckweed-overgrown ponds
Some ponds have become heavily overgrown by lemnids (duckweed; the tiny floating plants of the family Lemnaceae), and the site has also experienced blue-green algae (cyanobacteria) problems in the past. In this enclosure experiment, we assess sediments and overall ecosystem conditions, with a particular focus on how elevated pH can limit carbon dioxide (CO₂) availability in the water and thereby influence biological growth. There are many ponds facing similar challenges, and the results from this study are intended to be transferable to comparable sites.
Municipalities
Large Phosphorus Reduction System (Municipal Wastewater)
This state-of-the-art phosphorus reduction system treats municipal wastewater at flow rates of approximately 150 m³/day. The filter media is performing as designed, consistently producing effluent phosphorus concentrations well below the permitted target, providing stable compliance and operational reliability.
Homeowners
Small Systems for Environmentally Conscious Homeowners
A new, sustainable approach for homeowners who want to reduce their environmental footprint and protect local waters. By capturing phosphorus even from small, decentralized wastewater treatment systems, we help close the nutrient loop and support more circular nutrient management. The system delivers enhanced treatment performance, consistently meeting the target of 0.3 mg P/L in outlet water. It is designed for simple, low-maintenance operation and can also be configured for sites with no electricity or limited access.
Ready to optimize your filtration process?
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