Facility for oxygen-doping of water used to irrigate crops or to water animals (40) comprises an injector (7, 8), a water inlet line (20), at least one gas inlet line (3, 4, 5, 6), at least one source (1, 60) of oxygen or of a gas mixture including oxygen, a tank (17) of water at atmospheric pressure, a pump (9), a coil (10), a water pressure sensor (90), and a water flow sensor (80).

A method and equipment for plant cultivation, where the plants are supplied with water, over irrigation phases of specific duration spread over a 24 h day, which water has a given content of dissolved oxygen, characterized in that use is made of a system for boosting the injection of oxygen (or of an oxygen-containing gas mixture) in the irrigation water over a first period, of given duration, of one or some of the irrigation phases in question, and in that the remainder of the time of said irrigation phase(s) in question is characterized by a content of dissolved oxygen in the water which is nominal, i.e. lower than the boosted content of the first period.

A method of recycling unused gases in a water aeration process includes providing a confined plunging liquid jet reactor system; producing a water jet at an outlet of a nozzle; entraining air in the water jet as the water jet flows from the outlet of the nozzle to obtain an entrained air water jet; entraining oxygen in the entrained air water jet to obtain an entrained oxygen air water jet; flowing the entrained oxygen air water jet into a water in a fluid reservoir thereby forming small water bubbles as the entrained oxygen air water jet penetrates into the water; forming large water bubbles as the small water bubbles ascend toward the surface layer of the water; and recycling unused gases under a hood by flowing the unused gases toward the outlet of the nozzle, thereby entraining the unused gases in the entrained air water jet.

Containers for the production of a foamed sclerosant composition are provided. The containers includes a container body for foaming having one or more sidewalls extending between a top and a bottom of the container body, a foaming space being defined in an interior of the container body. Further, the foaming space contains a mixing component configured for rotating, particularly on the bottom of the container body, and including a magnetic part and a shape suitable for mixing. The container also includes a female coupling member for mating with a tip of a syringe, such that the syringe can be used for extracting the foamed sclerosant composition, and the container includes at least one opening which is covered by a gas-permeable barrier.

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.

A floating power generation unit is provided which, by dispersing oxygen content in water as fine air bubbles while generating power on the water, increases the activity of aerobic organisms, promotes plankton growth, and improves fishing grounds. This floating power generation unit is provided with a power generator, an oxygen separator, and a float. The power generator and the oxygen separator are arranged on the top surface of the float. The floating power generation unit is provided with a first fine air bubble generating medium which supplies the oxygen separated by the oxygen separator into the water as fine air bubbles and is provided with a second fine air bubble generating medium which supplies the nitrogen separated by the oxygen separator into the water as fine air bubbles.

Disclosed is a method for managing the operation of an apparatus for injecting oxygen into a purification basin. The oxygen notably being used by the biomass present in the purification basin to consume the pollution present in an effluent feedstock contained in the basin. The method comprises varying a rotational speed of the shaft by using a frequency variator, wherein an applied variation in speed is between plus 15% and minus 15% of the nominal speed of the shaft.

A method for preparing a foamed sclerosant composition. One method includes introducing a liquid sclerosant composition into a foaming space of an interior of a container, the foaming space containing a mixing component having a magnetic part. Rotation of the mixing component is achieved by generating for a first holding time a rotating magnetic field at a first speed and after the first holding time generating for a second holding time the rotating magnetic field at a second speed greater than the first speed.