A filtration medium useful to remove bacteria and/or inactivate virus in water. Examples of the medium include two outer layers made from cellulose fibers and an inner layer made of packed ceramic granules. Methods for producing the medium are also provided.

A filtration medium useful to remove bacteria and/or inactivate virus in water. Examples of the medium include two outer layers made from cellulose fibers and an inner layer made of packed ceramic granules. Methods for producing the medium are also provided.

A system for thermally bonding nonwoven fibers of assemblages of nonwoven fibers loosely held together may include a processing duct including an inlet end, an outlet end, and an intermediate portion extending between the inlet end and the outlet end. The system also may include one or more heat inlets located in the intermediate portion and configured to facilitate introduction of heat and air flow into the intermediate portion. The system further may include an inlet air feed at the inlet end and configured to separate the assemblages upon entry into the inlet end and propel the assemblages into the intermediate portion. The system also may include one or more heating devices configured to heat the assemblages as the assemblages are conveyed toward the outlet end to form processed assemblages, each of the processed assemblages including at least some nonwoven fibers adhered to one another.

The air purification face mask structure of the present invention, which includes a body, a fan, a filter, an outer cover, an air deflector, an ultrasonic vibration device, a face mask body and a strap, in which external air is guided into the face mask by the fan and the air deflector, and a solution like an enzyme or essential oil in a container is converted into an atomized state by the ultrasonic vibration device for spraying towards the mouth and the nose of a user, thereby achieving anti-bacterial and anti-inflammation effects.

A device (1) for cleaning a liquid (3) contaminated with oil, comprising a filling (7) made of a material that absorbs the oil (2), which filling is located inside a container (4) and is arranged between an inlet and an outlet (5, 6) of the container (4). According to the invention, the absorption property and handling of the filling (7) is increased by virtue of the fact that the filling is formed by a package-type tangle of keratin structures (8) that are randomly arranged and stochastically distributed in all three dimensions, which in the operating state of the device (1), comprise a closed container edge (9) between the inlet and the outlet (5, 6), and rest thereon in a liquid-tight manner.

A device (1) for cleaning a liquid (3) contaminated with oil, comprising a filling (7) made of a material that absorbs the oil (2), which filling is located inside a container (4) and is arranged between an inlet and an outlet (5, 6) of the container (4). According to the invention, the absorption property and handling of the filling (7) is increased by virtue of the fact that the filling is formed by a package-type tangle of keratin structures (8) that are randomly arranged and stochastically distributed in all three dimensions, which in the operating state of the device (1), comprise a closed container edge (9) between the inlet and the outlet (5, 6), and rest thereon in a liquid-tight manner.

An in situ system of filter rejuvenation has a fluid inlet on a first side of a reaction chamber, a fluid outlet disposed on a second side of the reaction chamber, a filtration chamber with a first wall comprising a ceramic glass material with a pass-band in the infrared spectrum. The filtration chamber is in fluid communication with the fluid inlet and the fluid outlet so that a fluid introduced into the inlet passes through the filtration chamber and exits through the fluid outlet. The system has at least one infrared heating element configured to transmit infrared energy within the pass-band of the ceramic glass material to heat the filter medium disposed within the filtration chamber to a temperature of at least 260° C., which can gasify contaminants without combustion.

A filter may remove PM.sub.2.5 and/or other airborne pollutants, which filter has fibers of an average diameter of no more than 500 nm, the fibers of at least 90 wt. % polyacrylonitrile, relative to all fibers in the filter; and a catalyst of at least 90 wt. % TiO.sub.2, relative to all catalytic metals in the filter, dispersed onto the fibers. The fibers need not be charged. The TiO.sub.2 may be condensed or precipitated onto the fibers out of a liquid containing the TiO.sub.2 and the fibers by simple methods. The catalyst may be activated by UV irradiation to decompose particulate matter having an average particle size of 2.5 μm or less, i.e., PM.sub.2.5, and/or other airborne pollutants from air. Such filters may be implemented around areas of vehicle traffic, e.g., as elements of traffic lights, and may be used to controllably purify polluted air.

A method of making activated carbon particles from hemp includes placing raw hemp within a predefined atmosphere to produce activated carbon particles from the raw hemp and carbonizing the raw hemp to produce the activated carbon particles. Hemp filters including the activated carbon particles from hemp are disclosed.

A stormwater filter includes a receptacle having an open top into which stormwater is permitted to enter the receptacle and flow downwardly therein. A hydroponic garden section having a media bed is supported within the receptacle and in an elevated condition above the bottom of the receptacle so that a water sump compartment is disposed between the hydroponic garden section and the bottom of the receptacle. In addition, a discharge opening is defined within a sidewall of the receptacle in the water sump compartment and adjacent the hydroponic garden section, and a post-filtration flow control orifice is associated with the discharge opening for controlling the filtration flow through the media bed. In addition, a wick is associated with the media bed for drawing water upwardly from the water sump compartment for use by plants growing within the media bed.