The invention relates to an ultrafine bubble (UFB) generator and a method for generating UFB. The invention also provides an ultrafine bubble-containing liquid and a production method of the liquid. An ultrafine bubble generator is prepared by combining (A) a sophorolipid containing acidic sophorolipid and lactonic sophorolipid in a ratio (mass ratio) of 78:22 to 100:0, (B) a free fatty acid or salt thereof, and (C) a gas generation component.

The primary object of the present invention is directed to a High Flow Venturi Nozzle capable of diffusing gas into a large quantity of fast-moving liquid. A secondary object of the present invention is directed to a two-piece High Flow Venturi Nozzle assembly. Lastly, a third object of the present invention is directed to a method of manufacturing and using the two embodiments noted above.

An aerator and an associated method and system are provided. The aerator includes an elongate body having a central bore that extends between proximal and distal ends of the body, and a plurality of channels formed in an outer surface of the body, the plurality of channels extending between the proximal and distal ends, and including at least two bends along their lengths. The bends in the channels help to provide a smoother flow of liquids passing through the aerator.

An aerator and an associated method and system are provided. The aerator includes an elongate body having a central bore that extends between proximal and distal ends of the body, and a plurality of channels formed in an outer surface of the body, the plurality of channels extending between the proximal and distal ends, and including at least two bends along their lengths. The bends in the channels help to provide a smoother flow of liquids passing through the aerator.

Proposed is a device for aerating a liquid. The device includes a housing having a liquid inlet channel, an air inlet channel and an outlet channel for a mixture of liquid and air. Mounted in the housing is a conical nozzle containing a swirler for feeding in liquid under pressure, the swirler having helical grooves on its outer surface. Mounted in the region where a conical jet of liquid exits an opening in the conical portion of the nozzle is a baffle with which the flow of liquid collides, resulting in cavitation, wherein air enters into the inner region of the jet of liquid via a channel in the baffle and through an opening in the baffle.

Proposed is a device for aerating a liquid. The device includes a housing having a liquid inlet channel, an air inlet channel and an outlet channel for a mixture of liquid and air. Mounted in the housing is a conical nozzle containing a swirler for feeding in liquid under pressure, the swirler having helical grooves on its outer surface. Mounted in the region where a conical jet of liquid exits an opening in the conical portion of the nozzle is a baffle with which the flow of liquid collides, resulting in cavitation, wherein air enters into the inner region of the jet of liquid via a channel in the baffle and through an opening in the baffle.

There is disclosed processes and systems for improving the efficiency of the separation of insoluble contaminants from a fluid in a floatation unit.

There is disclosed processes and systems for improving the efficiency of the separation of insoluble contaminants from a fluid in a floatation unit.

Embodiments include microfluidic devices and related methods. A microfluidic device for producing microbubbles may include a first microfluidic channel for supplying a continuous phase fluid, the first microfluidic channel including a convergent section and a constant-width section downstream from the convergent section, wherein the constant-width section discharges into a junction; a second microfluidic channel for supplying a dispersed phase fluid, the second microfluidic channel including an orthogonal section oriented orthogonal to the constant-width section, wherein the orthogonal section discharges into the junction; and a third microfluidic channel for conveying produced microbubbles, the third microfluidic channel including a divergent section, wherein the junction discharges into the divergent section.

A nozzle for generating fine bubbles, the nozzle including: a hollow housing; and a plurality of plates provided in the housing and partitioning the housing into a plurality of spaces, wherein an upper face or a side face of the housing is provided with an inflow port into which a gas-dissolved liquid flows and which communicates with an uppermost space of the spaces partitioned by the plate, each of the plates is provided with a plurality of through-holes, and a lower face of the housing is provided with a slit communicating with a lowermost space of the spaces partitioned by the plate.