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.

The invention provides a vacuum cleaner filter bag comprising a wall of an air-permeable material enclosing an interior and an inlet opening introduced into the wall, wherein the air-permeable material comprises at least one layer of a nonwoven fabric, which comprises powdery and/or fibrous recycled material from the production of textiles, in particular cotton textiles, wherein the at least one layer of the nonwoven fabric comprises powdery and/or fibrous recycled material having a density of 0.005 g/cm.sup.3 to 0.03 g/cm.sup.3, in particular of 0.007 g/cm.sup.3 to 0.02 g/cm.sup.3.

The invention relates to a vacuum-cleaner filter bag comprising a wall made of an air permeable material and surrounding an inner chamber, and an inlet opening introduced into the wall. The vacuum-cleaner filter bag is characterized in that the air permeable material comprises at least one layer made from a non-woven fabric and/or a layer made from a fiber web which comprises fibers or is made from fibers which are made from a recycled plastic or a plurality of recycled plastics.

The invention provides a vacuum cleaner filter bag, comprising a wall enclosing an interior and made of an air-permeable material and an inlet opening introduced into the wall, characterized in that the air-permeable material comprises at least one layer of a nonwoven fabric which comprises powdery and/or fibrous recycled material from the production of textiles, in particular cotton textiles, and/or from wool shearing and/or seed fibers.

The invention provides a vacuum cleaner filter bag comprising a wall of an air-permeable material enclosing an interior and an inlet opening introduced into the wall, wherein the air-permeable material comprises at least one layer of a nonwoven fabric, which comprises powdery and/or fibrous recycled material from the production of textiles, in particular cotton textiles, wherein the at least one layer of the nonwoven fabric comprises powdery and/or fibrous recycled material having a density of 0.005 g/cm.sup.3 to 0.03 g/cm.sup.3, in particular of 0.007 g/cm.sup.3 to 0.02 g/cm.sup.3.

A water reclamation system that includes a primary module with separation capabilities and a dirty water tank, a secondary module with a treatment tank, ozone generating capabilities, a recirculation circuit and a catalyst filter, a tertiary module with filtration capabilities, and a treated water tank. The system may also include a desalination module, a turbulence promoter inside the treatment tank and/or water electrical conductivity measuring elements for water electrical conductivity control in the treated water tank. The water reclamation system has overall measures smaller than 15 meters of length, 4 meters of width or 3 meters of height and the nominal design flow of water to be treated is between 0.5 and 25 m3/h. A corresponding water treatment method is also provided.

A ceramic filter including composite material having a porosity comprised between 0.1 m and 10 m is provided. A process for cleaning the ceramic filter, a process for producing the ceramic filter and a container for liquids including the ceramic filter are also provided. Advantageously, the ceramic filter, the process for cleaning the ceramic filter, the process for producing the ceramic filter and the container for liquids comprising the ceramic filter help people live a healthier lifestyle, through non-disposable but long-lasting products, promoting consumption of tap water and eliminating 100% of plastics. The ceramic filter and the container for liquids comprising the ceramic filter advantageously give people the possibility of drinking pure, good and safe water, producing zero waste, through sustainable, long-lasting and completely plastics-free products.

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 filter medium is provided that comprises a nonwoven layer. The nonwoven layer comprises a sizing agent and a hydrophobic, stiffening binder resin. The nonwoven layer may be corrugated. A method producing a filter medium is also provided. The filter medium may be a fuel filter, oil filter, air filter, or an electric discharge filter. The filter medium, after corrugation, pleating, or embossing, avoids or minimizes water ingress, while still allowing the filter medium to maintain its structural and filtration properties.