Views: 0 Author: Site Editor Publish Time: 2026-09-13 Origin: Site
Published: Project Delivery & Engineering Notes | Equipment: Flygoo FG-OF Oxygen-Source Ozone Generator Skid
Managing an outdoor public swimming pool comes with a distinct set of operational headaches. Heavy bather loads introduce sweat, body oils, and cosmetics into the water. At the same time, direct sunlight, warm ambient temperatures, and seasonal rain create the perfect environment for stubborn green algae blooms. When operators try to solve these problems by constantly dumping more chlorine into the pool, they usually end up with harsh chloramine fumes, burning eyes, skin complaints from swimmers, and mounting chemical bills.
To break this cycle, commercial pool operators are shifting toward side-stream ozone oxidation. The Flygoo FG-OF Series Oxygen-Fed Pool Ozone Generator is designed specifically for this role, providing high-concentration ozone gas generated on-site from concentrated oxygen to sanitise water, kill algae spores, and destroy combined chlorine without leaving toxic chemical residues.
Figure 1: Flygoo FG-OF skid components: (1) Ozone generator, (2) Backflow protection device, (3) Ozone contact tank, (4) PVDF venturi injector, (5) Catalytic off-gas destructor.
Figure 2: Fully assembled Flygoo FG-OF water treatment skid ready for commissioning.
Ozone ($O_3$) is one of the strongest oxidizers readily available for commercial water treatment. Unlike standard chlorine, which works slowly against resistant organisms, dissolved ozone acts almost instantaneously upon contact:
Destruction of Green Algae: Algae cells thrive under solar UV exposure. Ozone directly oxidizes and ruptures the cell walls of algae and oxidizes their chlorophyll, neutralizing the bloom and preventing it from sticking to pool tiles and grouting.
Elimination of Chloramines (The "Chlorine Smell"): That strong, irritating chemical odor around public pools is not free chlorine—it is chloramines (monochloramine, dichloramine, and nitrogen trichloride) formed when chlorine reacts with organic waste. Ozone oxidizes these compounds back into inert nitrogen gas and trace nitrates.
Micro-Flocculation for Crystal-Clear Water: Ozone alters the surface charges of microscopic colloidal particles in the pool water. This causes tiny suspended matter to clump together, allowing downstream sand filters to trap them easily.
Reduced Chemical Consumption: Introducing ozone handles up to 80% to 90% of the oxidative workload, allowing pool operators to keep chlorine levels at a minimum residual level just for secondary pipeline sanitation.
The FG-OF series is an oxygen-source system. It pulls ambient air through an internal PSA (Pressure Swing Adsorption) oxygen concentrator, purifying it into 90%+ pure oxygen before feeding it into the quartz corona discharge tube. This produces a high-strength ozone gas stream (typically 80–110 mg/L) that dissolves quickly into water with high mass-transfer efficiency.
Figure 3: Typical side-stream installation schematic for commercial and public swimming pools.
Rather than treating the full pool recirculation stream directly, the equipment runs on a controlled side-stream (slipstream) loop, usually treating 15% to 25% of total flow:
Pre-Filtration: Recirculating pool water passes through the hair and lint strainer, primary water pumps, and high-rate sand filters to take out particulate debris.
Side-Stream Booster & Venturi Injection: A dedicated booster pump draws filtered water into a corrosion-resistant PVDF Venturi injector (Point 4). The differential pressure creates strong suction, pulling ozone gas from the generator into the water stream as microscopic bubbles.
Backflow Water Protection: Between the ozone generator and the venturi sits a dedicated Backflow Water Protection Device (Point 2) fitted with precision check valves. This prevents pressurized water from creeping backward into the corona discharge chamber during unexpected pressure surges or pump shutdowns.
Contact & Reaction Tank: The water-ozone mixture enters a vertical FRP reaction vessel (Point 3) providing 2 to 3 minutes of contact time. This is where primary pathogen inactivation and organic breakdown happen.
Catalytic Off-Gas Destruction: Any undissolved ozone gas collects at the top vent of the reaction tank and passes through an Ozone Destructor (Point 5). The catalytic core converts residual $O_3$ back into harmless oxygen ($O_2$) before venting outside, ensuring full plant room safety.
Return to Main Line: The ozonated water rejoins the main recirculation line, runs through heat exchangers, receives a minor chlorine trim dose, and returns to the pool basin.
In humid tropical climates like Indonesia, outdoor resort and public pools face extreme challenges. High daytime temperatures, daily rainstorms, and intense bather loads frequently trigger sudden algae blooms that turn pools cloudy green within hours. Heavy chlorine dosing at an Indonesian resort property was causing guest complaints over chemical odors and eye irritation while failing to keep the water consistently clear.
Figure 4: Side-stream skid setup in the Indonesian customer's pool mechanical room.
Figure 5: Front view of the FG-OF unit coupled with the primary circulation and booster piping.
Figure 6: Side view showing the PVDF venturi suction assembly and electrical controls.
The resort installed a Flygoo FG-OF Oxygen-Source Ozone System on a side-stream loop parallel to their sand filtration circuit. The installation was straightforward, requiring only basic pipe cutting for the venturi bypass, mounting the stainless steel backflow column, and piping the top vent to the catalytic destructor.
Operating results reported by the maintenance supervisor after four weeks of operation:
Algae Eliminated: The green haze and slippery tile coating disappeared within the first 36 hours of continuous operation. Even after afternoon rain downpours, the water remains bright blue and clear down to the bottom tiles.
No More Chemical Odors: The sharp, suffocating chlorine stench around the pool deck was completely eliminated. Air quality around the water feels clean and neutral.
65% Reduction in Chlorine Purchases: The property cut its liquid chlorine usage by nearly two-thirds. Chlorine is now kept at a minimal baseline (0.5–1.0 ppm) purely for line residual protection.
Lower Water Turnover & Backwash Frequency: Because ozone micro-flocculates fine dirt into the sand filters, filter efficiency increased, cutting down the need for excessive backwashing and fresh water replacement.
Check the Venturi Suction Gauge: Ensure your booster pump produces enough differential pressure across the PVDF venturi throat. Weak suction reduces mass transfer and wastes ozone gas.
Inspect the Backflow Column Daily: The clear sight glass or drain port on the anti-backflow device (Point 2) should always stay dry during normal running. If moisture appears, inspect the check valve seals immediately to safeguard the discharge tube.
Keep Plant Rooms Ventilated: Even with an active off-gas destructor on the contact tank, proper airflow in underground mechanical rooms remains standard engineering practice for pool service teams.
Whether you operate an outdoor municipal facility, a resort waterpark, or a competitive natatorium, Flygoo engineers can calculate the required ozone output (g/h), select the right oxygen source skid, and provide custom installation layouts for your pipe room.
Contact the sales team for a free quote and advice
In commercial and public pools, ozone does not completely replace chlorine because ozone reacts quickly in the side-stream loop and leaves no persistent disinfectant residual inside the large pool basin itself. However, it takes on 80% to 90% of the oxidation work, allowing operators to slash chemical chlorine additions down to minimal baseline levels (typically 0.5–1.0 ppm) to meet local public health codes.
The Flygoo FG-OF uses concentrated oxygen (90%+ purity), which yields ozone concentrations between 80 and 110 mg/L—roughly 4 to 5 times stronger than air-fed systems. Higher concentration dramatically increases dissolution efficiency in the venturi injector, uses smaller contact vessels, and eliminates unwanted nitric acid byproducts that can form when humid ambient air is subjected to electrical discharge.
Flygoo systems use a multi-stage backflow prevention system: ozone-resistant PVDF spring-loaded check valves, a dedicated stainless steel backflow water protection column with an overflow discharge port, and positive pressure gas delivery. If line water pressure surges or the circulation pump cuts out, water is physically prevented from reaching the electrical corona discharge module.
No. In an engineered side-stream setup, the ozone oxidizes pathogens inside the contact tank. Any excess undissolved gas is vented off and neutralized through the catalytic off-gas destructor at the top of the vessel. By the time the treated side-stream mixes back into the main return pipe, dissolved ozone rapidly reverts back to dissolved oxygen, so no active ozone gas reaches the pool surface.
To learn more about ozone laundry systems, please contact Flygoo Ozone Sales:
Email: info@flygoo-ozone.com
Web: www.chinaozonegenerator.com
