The Estuary supersonic separator combines thermo-­, aero- and fluid dynamics. Originally it was developed for natural gas treatment by expanding a gas supersonically in a Laval-type tube.

Outside the natural gas markets the SuperSep condenses and separates water from air at high velocities  in combination with (dust) particles  down to a size of <5 micron.  The SuperSep is a static piece of equipment; it has no moving or rotating parts; therefore there are no maintenance costs.

Courtesy of Twister BV
Courtesy of Twister BV

The thermodynamics are similar to a turbo­‐expander: expansion-, condensation-, cyclonic air / liquid separation and re­compression. Air is cooled extremely fast in micro-seconds  and very small droplets are formed.  As air is ‘swirled’ through static vanes generating high G – forces, all water droplets and all particles (even the very small ones) are centrifuged out and recovered.

The SuperSep can either be applied for removal of dry particles (fine dust) or in combination with water condensation (extremely fine dust / aerosols).


Dry particles (> 1μm) are found  in air from dryers and from silos in the Food and Agricultural industry. Estuary initially focuses upon milk powder and  sugar, but depending on market “pull” also flour, grain, cocoa, animal feed, detergents, fertilizers and later on potentially also in the chemicals market for catalyst and saw dust.

SuperSep removal of aerosols (particles <1 μm) is also possible by making use of water condensation on these aerosols. Potential applications are in mining and clean rooms, in combination with air drying (conditioning).