A device (100) for aeration of and separation of carbon dioxide from a fluid is disclosed. The device comprises at least a first and a second screen gear (101,102) said first and second screen gear (101,102) comprising several screen windows (203) in the form of openings. The shape and/or distribution of said screen windows (203) on said first and second screen gear (101,102), when said first and second screen gear (101,102) are connected, is such that at least 20%, preferably at least 25%, more preferably at least 30%, of the screen windows (203) of the first screen gear (101) are asymmetrically distributed in relation to the screen windows (203) of the second screen gear (102), asymmetrically distributed implying that the edges surrounding the screen windows of the first screen gear are not 100% overlapping the edges of the screen windows of the second screen gear when the first and second screen gear are connected and seen from above.

This invention is a portable fountain which pumps the hypolimnion to spray above the surface in a stratified body of water fountain resulting in aeration and heat transfer by accessing sub-thermocline depths. There are prior art fountains which circulates a stratified body of water, however these are permanent installations often connected to a commercial power grid. Other, portable-type fountains are not designed to access sub-thermocline depths and do not adequately circulate the hypolimnion. Thus a need exists for a portable fountain which circulates and aerates a stratified body of water for use in areas which lack a permanent fountain system. Applications of this invention involve aeration, temperature fluctuation to cool the surface during summer, and temperature fluctuation to warm the surface during winter. Benefits of this device include comfort for swimmers in hot weather, prevention of ice formation in the winter, and overall environmental improvement due to aeration.

This invention is a portable fountain which pumps the hypolimnion to spray above the surface in a stratified body of water fountain resulting in aeration and heat transfer by accessing sub-thermocline depths. There are prior art fountains which circulates a stratified body of water, however these are permanent installations often connected to a commercial power grid. Other, portable-type fountains are not designed to access sub-thermocline depths and do not adequately circulate the hypolimnion. Thus a need exists for a portable fountain which circulates and aerates a stratified body of water for use in areas which lack a permanent fountain system. Applications of this invention involve aeration, temperature fluctuation to cool the surface during summer, and temperature fluctuation to warm the surface during winter. Benefits of this device include comfort for swimmers in hot weather, prevention of ice formation in the winter, and overall environmental improvement due to aeration.

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 drinkware vessel for aerating and mixing beverages comprises an interior surface defining a cavity and a plurality of divergent ridges protruding from the interior surface. The divergent ridges include two pairs of bi-directional wave ramps disposed on opposing sides of the cavity. Swirling the beverage causes the divergent ridges to direct flow, induce mixing, and generate micro-bubbles by increasing liquid surface area. The vessel further comprises an upper portion with a rim and a headspace defining a diffusion chamber for capturing aroma molecules. The rim is shaped to direct beverage flow to a targeted palate area. The divergent ridges may have curved edges, taper in width, and facilitate a specific flow pattern. The vessel enhances aeration and mixing compared to vessels without divergent ridges.

A drinkware vessel for aerating and mixing beverages comprises an interior surface defining a cavity and a plurality of divergent ridges protruding from the interior surface. The divergent ridges include two pairs of bi-directional wave ramps disposed on opposing sides of the cavity. Swirling the beverage causes the divergent ridges to direct flow, induce mixing, and generate micro-bubbles by increasing liquid surface area. The vessel further comprises an upper portion with a rim and a headspace defining a diffusion chamber for capturing aroma molecules. The rim is shaped to direct beverage flow to a targeted palate area. The divergent ridges may have curved edges, taper in width, and facilitate a specific flow pattern. The vessel enhances aeration and mixing compared to vessels without divergent ridges.