Jul 16, 2025
Ilirija Swimming Pool in Ljubljana Adopts Nanobubble Tech to Treat Rainwater
What Are Nanobubbles?
Nanobubbles—ultrafine gas bubbles smaller than 120 nm—offer remarkable benefits in water treatment. Unlike larger bubbles, they remain suspended in water for weeks or months, delivering dissolved oxygen deep into the water column. Their tiny size and negative surface charge help them attract organic contaminants and enhance oxidation—all without chemicals
Why Nanobubbles for Rainwater?
Collected rainwater often contains debris, algae, and low oxygen levels—ideal conditions for microbial growth and unpleasant odors. By injecting oxygen-filled ultrafine bubbles, the Ilirija system:
— Raises dissolved oxygen—fueling aerobic breakdown of organic matter
— Releases reactive oxygen species (ROS) that disrupt algae and bacteria
— Uses physical flotation to bring fine particulates to the surface for easy removal
— Prevents harmful biofilm formation
How It Works at Ilirija
The pool facility collects roof and surface runoff during rain. Instead of sending it to the local sewer or letting it stagnate, the water flows into a holding tank equipped with a ultrafine bubble generator. Here’s what happens:
Oxygen Injection – Pressurized oxygen and ozone is infused into the water, generating billions of stable ultrafine bubbles.
Purification Phase – Over hours—or days—the bubbles oxygenate the water, oxidize contaminants, and float debris to the surface for removal.
Storage & Reuse – Cleaned rainwater is then repurposed for irrigation around the facility, or maintenance uses—reducing non-potable water consumption.
Environmental & Operational Benefits
Eco-friendly & cost-effective
Ultrafine bubble system eliminates and reduces the need for chemical disinfectants, aligning with Ilirija’s sustainability goals. Operating costs are lower too, thanks to efficient aeration—transfer rates exceed 85%, far outpacing traditional methods
Improved water quality
The nano‑oxygenation process helps prevent algae blooms and foul odors in storage tanks—enhancing safety and reducing wear on the system .
Resilience & resource efficiency
In times of drought or water restrictions, Ilirija can rely on its treated rainwater reserve, lessening strain on municipal supplies.
Looking Ahead
Ilirija’s rainwater treatment initiative leverages advanced Slovenian innovation—like systems from Waboost.
By coupling sustainable water reuse with modern tech, Ilirija sets a new standard in Ljubljana—cleaner water, greener practices, and a brighter future.
