MIXFLO®
Why choose MIXFLO® for gas dissolution in wastewater
High-efficiency gas dissolution in liquids
For over 40 years, MIXFLO® has been SIAD’s proprietary technology for transferring pure oxygen into biological treatment tanks. The system, consisting of a centrifugal pump, tubular dissolver and liquid-liquid ejectors, ensures high transfer yields, minimizes atmospheric emissions and can be applied to open or closed tanks of any shape.
90%
O₂ dissolution efficiency above 90%
1:200
Atmospheric emissions reduced 1:200
50-70%
Electricity consumption reduced by 50-70%
O₂ transfer efficiency above 90%
O₂ transfer efficiency above 90%
With the MIXFLO® system, oxygen dissolution efficiency > 90% is achieved in the 3 to 4.5 kgO₂/kWh range, depending on the parameters governing gas solubility in wastewater (temperature, salinity, TSS, hydraulic head). The MIXFLO® system reduces electricity consumption by 50-70% compared with the average of traditional blown-air systems.
Atmospheric emissions reduced
Atmospheric emissions reduced by more than 200 time
Pressurized contact between O₂ and wastewater, reintroduced at the bottom of the tank through liquid-liquid ejectors, drastically limits atmospheric stripping of aerosols, VOCs, greenhouse gases and unpleasant odors. For every m³ of O₂ transferred to the biomass with MIXFLO®, only ~0.1 m³ of O₂ is emitted, compared with more than ~20 m³ of exhaust gas from air-based systems.
Over 40 years
Over 40 years of SIAD patent history and full-scale applications
Conceived in the early 1980s and patented by SIAD for the injection of pure oxygen into open tanks, MIXFLO® remains the benchmark system in its fields of application: activated sludge, MBR plants, SBR, aerobic digestion of excess sludge, ozonolysis and pH control with CO₂. Available in external and submersible skid-mounted versions.
Configurations and technologies of the SIAD MIXFLO® system
SIAD offers an integrated solution for gas dosing in treatment tanks, from the standard configuration to the skid-mounted submersible version, up to the MIXFLO3 variant dedicated to ozonation. All solutions are designed to ensure high transfer yields and automated dosing management.
MIXFLO®: the benchmark technology for dissolving oxygen in wastewater
MIXFLO® is SIAD’s patented system for transferring pure oxygen into biological treatment tanks. Composed of a centrifugal pump, tubular dissolver and liquid-liquid ejectors, it ensures efficiencies above 90% in the 3-4.5 kgO₂/kWh range, in open or closed tanks of any shape.
Submersible MIXFLO®: quick start-up thanks to skid-mounted installation
The submersible version arrives at the plant already pre-assembled on a skid, ready to be lowered directly into the tank. This solution reduces field intervention times and enables rapid start-up of oxygen delivery.
MIXFLO3: ozone dissolution and residual oxygen recovery
MIXFLO3 is the variant dedicated to ozone dosing in water and sludge lines. The system can be easily integrated into closed contact tanks, including pressurized ones, ensuring high plant flexibility. It also enables complete recovery of unreacted oxygen within oxidation and aerobic digestion compartments, resulting in energy savings and a drastic reduction of atmospheric emissions, down to complete elimination.
Automatic dosing: O₂ modulated according to actual process demand
With MIXFLO®, dosing is automatically controlled by signals from dissolved oxygen and redox potential analyzers installed in the tank. O₂, even when self-produced on site with VPSA technology, is continuously modulated according to the actual demand of the oxidative process.
Contact us
Do you want to enhance your plant?
Tell us about the geometry of your tanks and your process objectives. Our technicians will assess the MIXFLO® configuration best suited to your case.
Related applications
Explore other SIAD technologies
Synergistic technologies for water treatment and atmospheric emission reduction
