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 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.

Disclosed are a blood filter which exhibits excellent leukocyte elimination performance as well as significantly improved blood throughput per unit time and erythrocyte recovery rate and a method of manufacturing the same. The blood filter of the present invention includes a pre-treatment filter which is a laminate of first non-woven fabrics having a mean fiber diameter of 5 to 30 μm and a mean pore size of 10 to 30 μm, and a main filter which is a laminate of second non-woven fabrics having a mean fiber diameter of 1 to 5 μm, a mean pore size of 5 to 10 μm and a mean pore size distribution rate of 30% or more. A filling density of the pre-treatment filter and a filling density of the main filter, with respect to a target blood throughput of the blood filter, are 0.1 g/100 ml to 1 g/100 ml and 1 g/100 ml to 3 g/100 ml, respectively.

An arrangement is provided for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit comprising disc filters. The arrangement includes a measurement bar (20) that includes two or more microphones (21), a store (45) including stored sound samples, at least one alarming means and a processing arrangement (43) for analyzing online sound or sound samples captured by the microphones (21). The processing arrangement (43) is connected to the microphones (21), the store (45) and the at least one alarming means. A method is also disclosed for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit.

Provided a method for separating PHA and PHA prepared therefrom. The method comprises the following steps: subjecting a PHA fermentation broth to solid-liquid separation to obtain a thallus precipitate; breaking cell walls of the thallus precipitate, and subjecting obtained wall-broken products to a plate and frame filtration to obtain PHA; a filter cloth for the plate and frame filtration is pre-coated with a PHA layer. The method adopts a plate and frame separation to replace the traditional centrifugal separation to prepare PHA, and the PHA layer is pre-coated on the filter cloth for the plate and frame filtration, thereby overcome the defects in the prior art such as high cost and operational difficulty caused by adopting multiple centrifugal separations; in addition, the method of the present disclosure also exhibits the advantages of high recovery rate of PHA and high purity of the prepared PHA product.

Provided a method for separating PHA and PHA prepared therefrom. The method comprises the following steps: subjecting a PHA fermentation broth to solid-liquid separation to obtain a thallus precipitate; breaking cell walls of the thallus precipitate, and subjecting obtained wall-broken products to a plate and frame filtration to obtain PHA; a filter cloth for the plate and frame filtration is pre-coated with a PHA layer. The method adopts a plate and frame separation to replace the traditional centrifugal separation to prepare PHA, and the PHA layer is pre-coated on the filter cloth for the plate and frame filtration, thereby overcome the defects in the prior art such as high cost and operational difficulty caused by adopting multiple centrifugal separations; in addition, the method of the present disclosure also exhibits the advantages of high recovery rate of PHA and high purity of the prepared PHA product.

The present invention relates to a fabric for purification of water. An object of the present invention is to provide a fabric for purification of liquids which achieves at least 2 log reductions of bacteria, and viruses. It is a further object of the present invention to provide a fabric for purification of liquids which provides high flow rates in gravity fed water purification systems. The present inventors have surprisingly found that a fabric having a matrix of polymer impregnated with organosilane superimposed on a surface of the fibre of a fibrous support not only provides reduction of viruses from a liquid to be purified at low pressure drops but also removes bacteria without using a separate microfiltration membrane and also retains high flow rates.

A breathing half mask, which can be brought by a folding operation from a storage state into a use state. A mouth area is arranged between a nose area (11) with a nose sealing line (41) and a chin area (12) with a chin sealing line (42). A first connection section (14.1, 14.2) connects the nose area (11) and/or the chin area (12) to the mouth area. A second connection section (15.1, 15.2) connects the nose area (11) and/or the chin area (12) to another mask area (10) in order to limit the nose sealing line (41) and/or the chin sealing line (42). The second connection section (15.1, 15.2) extends a distance from an edge of the nose area (11) and/or from an edge of the chin area (12) between the first connection section (14.1, 14.2) and the nose sealing line (41) and/or the chin sealing line (42).

A filter assembly comprising a prefiltering support layer (84) is disclosed, wherein the prefiltering support layer (84) comprises a non-woven fabric of fibers, the non-woven fabric having a pore size. A first mesh filter layer (85) is arranged downstream the prefiltering support layer (84), wherein the first mesh filter layer (85) has a first mesh size, wherein the pore size of the prefiltering support layer (84) is equal to or bigger than the first mesh size of the first mesh filter layer (85). A container for collecting a body fluid comprising such a filter assembly as well as a method for manufacturing such a filter assembly are also disclosed.

A filter element comprises a porous body. The porous body is made of bonded matter, including: at least one material for binding lead; and at least a binder having a Melt Flow Rate, MFR, of more than 1 g/10 min. The porous body has a Mean Flow Pore size, MFP, in a range of between 0.1 and 11 m.