A hand vacuum cleaner has an openable air treatment stage. The air treatment stage has a lower openable portion that is moveably mounted to a forward portion of the pre-motor filter housing.

A water cooling/recirculating management system, including: a controller; a fluid displacement pump; a centrifugal separator; a germicide generator; and a primary side stream magnetic field generator.

A water cooling/recirculating management system, including: a controller; a fluid displacement pump; a centrifugal separator; a germicide generator; and a primary side stream magnetic field generator.

A hand vacuum cleaner has an air treatment stage positioned below an inlet conduit. A pistol grip handle is provided at the rear end of the hand vacuum cleaner. An arm member extends from the inlet conduit linearly rearwardly to the upper end of the pistol grip handle. A housing is provided at a lower end of the pistol grip handle. All operating components of the hand vacuum cleaner are located between a lower end of the housing and the inlet conduit.

A hand vacuum cleaner has an air treatment stage positioned below an inlet conduit. A pistol grip handle is provided at the rear end of the hand vacuum cleaner. An arm member extends from the inlet conduit linearly rearwardly to the upper end of the pistol grip handle. A housing is provided at a lower end of the pistol grip handle. All operating components of the hand vacuum cleaner are located between a lower end of the housing and the inlet conduit.

A passive cyclone separator to treat a fluid in a microgravity environment to separate a liquid phase of the fluid from a gas phase of the fluid, comprising a tubular body having a longitudinal axis and internally defining a separation chamber within which the gas phase of the fluid is separable, in use, from the liquid phase of the fluid; an inlet opening through which the fluid is injectable, in use, into the separation chamber along an injection axis; a liquid phase outlet opening, through which the liquid phase separated from the gas phase exits, in use, the separation chamber; and a gas phase outlet opening, through which the gas phase separated from the liquid phase exits, in use, the separation chamber; the injection axis is inclined towards the liquid phase outlet opening so as to define a non-zero fluid injection angle with a direction orthogonal to the longitudinal axis.

A passive cyclone separator to treat a fluid in a microgravity environment to separate a liquid phase of the fluid from a gas phase of the fluid, comprising a tubular body having a longitudinal axis and internally defining a separation chamber within which the gas phase of the fluid is separable, in use, from the liquid phase of the fluid; an inlet opening through which the fluid is injectable, in use, into the separation chamber along an injection axis; a liquid phase outlet opening, through which the liquid phase separated from the gas phase exits, in use, the separation chamber; and a gas phase outlet opening, through which the gas phase separated from the liquid phase exits, in use, the separation chamber; the injection axis is inclined towards the liquid phase outlet opening so as to define a non-zero fluid injection angle with a direction orthogonal to the longitudinal axis.

A recovery system of composite powder carrier in HPB municipal wastewater treatment includes a biochemical tank and a concentration tank. The composite powder carrier is added to the biochemical tank for biochemically treating on the wastewater. The mixed liquid is then made to flow into the concentration tank. The supernatant obtained after filtration is then discharged. The concentrated sludge is returned to the biochemical tank, and the excess concentrated sludge is transported to a separator. The separator separates the substances with large specific gravity from those having smaller specific gravity, and the substances with large specific gravity are recycled to the biochemical tank for reuse. Matter having smaller specific gravity is discharged. The separator can be used to separate the composite powder carriers for recycling, which improves the utilization rate of the composite powder carriers and reduces the operation cost of the HPB technology for wastewater treatment.

A recovery system of composite powder carrier in HPB municipal wastewater treatment includes a biochemical tank and a concentration tank. The composite powder carrier is added to the biochemical tank for biochemically treating on the wastewater. The mixed liquid is then made to flow into the concentration tank. The supernatant obtained after filtration is then discharged. The concentrated sludge is returned to the biochemical tank, and the excess concentrated sludge is transported to a separator. The separator separates the substances with large specific gravity from those having smaller specific gravity, and the substances with large specific gravity are recycled to the biochemical tank for reuse. Matter having smaller specific gravity is discharged. The separator can be used to separate the composite powder carriers for recycling, which improves the utilization rate of the composite powder carriers and reduces the operation cost of the HPB technology for wastewater treatment.

The present invention relates to a method for recovering metals using an adsorbent, which comprises preparing a leachate comprising metal ions and cyanides, wherein the metal ions comprise gold ions and copper ions; and in a state where the leachate has a cyanide (CN) concentration of 0.1 ppm or greater, adding to the leachate an adsorbent, which has an open circuit potential value between the open circuit potential value of the gold ions and that of the copper ions; and selectively adsorbing the copper ions to the adsorbent.