MicroGas™ – Microbubble Generator

The minimal equipment, minimal OpEx alternative to DAF

The MicroGas™ Microbubble Generator is the most cost-efficient and robust flotation device to maximize the removal of suspended solids and Fat, Oil & Grease (FOG) regardless of pH, temperature or salinity. Originally designed as a minimal-equipment, low-OpEx alternative to DAF, the MicroGas™ Microbubble Generator has many applications including water and wastewater treatment, chemical reactors and aquaculture.

Its novel technology is based on ceramic diffuser discs mounted on a rotating shaft. Compressed air/gas is injected at 1-2 bar into the shaft and permeates through the diffusers into the liquid, where a cloud of Microbubbles between 50 – 70 micron is generated (white water) with an extremely low energy consumption. Unlike in DAF systems, no pressure is required to dissolve the gas into the liquid, and hence energy consumption is not reliant on salinity and temperature of the water. Furthermore, flotation systems based on MicroGas™ do not require saturation vessel, recycle pumps or nozzles, making them more reliable and cost-effective.

Key Benefits

Minimal Operating Costs

MicroGas™ only requires compressed air/gas at low pressures (1-2 bar) and a low voltage DC motor.

Minimal Equipment

Unlike in DAF systems, no saturation vessel, recycle pumps or nozzles are required.

No Clogging

The shear forces generated at the surface of the diffusors by the outgoing gas and the rotating shaft prevent them from clogging, having an automatic self-cleaning effect.


DAF / Clarifier retrofits
Water treatment (TSS and FOG removal)
Ozonation / Oxidation
Algae harvesting
Tramp oil removal from metalworking fluids
Hydroponics and marine farming
Bubble column reactors

Key Features

Bubble Size 50-70 micron
Energy consumption < 0,05 kWh/m³
OpEx independent from salinity, temperature and pH
Plug & Play / Easy installation
Self-cleaning / No clogging due to solids
Minimal equipment
Use of any Gas
Adjustable size and amount of bubbles (air-to-solids ratios)
Robust to extreme environments (corrosive, thermal and chemical)
Treat flow rates from 1 to 100 m³/h