The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.

A suspended-matter removing method and a suspended-matter removing apparatus are disclosed that require no sludge treatment facility, and inexpensively provide filtrate satisfying a water quality standard. The suspended-matter removing method includes: feeding a protrusion element to a filter layer formed by filling a solid filter material, adding a protrusion to a surface of the solid filter material; after feeding protrusion element, determining whether a protrusion has been added to the surface of the solid filter material, and when it is determined that the protrusion has been added, reducing a feeding amount of the protrusion element as compared with when adding the protrusion; forming a biofilm on the surface of the solid filter material; and passing water to be treated containing suspended matters through the filter layer having the solid filter material added with the protrusion in a state in which the feeding amount of the protrusion element is reduced.

A suspended-matter removing method and a suspended-matter removing apparatus are disclosed that require no sludge treatment facility, and inexpensively provide filtrate satisfying a water quality standard. The suspended-matter removing method includes: feeding a protrusion element to a filter layer formed by filling a solid filter material, adding a protrusion to a surface of the solid filter material; after feeding protrusion element, determining whether a protrusion has been added to the surface of the solid filter material, and when it is determined that the protrusion has been added, reducing a feeding amount of the protrusion element as compared with when adding the protrusion; forming a biofilm on the surface of the solid filter material; and passing water to be treated containing suspended matters through the filter layer having the solid filter material added with the protrusion in a state in which the feeding amount of the protrusion element is reduced.

A cross-flow filtration device includes: a filter module which includes an inner chamber and an outer chamber separated by a semipermeable membrane; a process liquid tank which is configured to accommodate a process liquid; a pump which is configured to cause the process liquid to circulate to the inner chamber in the filter module and the process liquid tank; a replenisher tank which is configured to accommodate a replenisher liquid to be replenished into the process liquid tank, at least one or more sensors which are configured to measure a pressure of the circulating process liquid; and a replenisher measurement unit which is configured to measure an amount of the replenisher liquid supplied from the replenisher tank to the process liquid tank. The process liquid tank is configured to be continuously replenished with the replenisher liquid.

The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.

The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.

Modular sectorised filtering element consisting of a flat modular filter element whose surface has at least two concentric strips, the stacking of which forms a filter surface. This module allows the sectorised filtration of the fluid passing through it, with the possibility of the same filter surface also having parts dedicated simultaneously to filtration, washing, different degrees of filtration, etc. It is composed of an outer perimeter strip (1) with a zig-zag groove (4), an intermediate perimeter strip (2) with holes (6), which have radial walls (7), and concentric separation walls (8) of a stackable shape, and an inner perimeter strip (3) with a configuration similar to the outer strip (1).

Modular sectorised filtering element consisting of a flat modular filter element whose surface has at least two concentric strips, the stacking of which forms a filter surface. This module allows the sectorised filtration of the fluid passing through it, with the possibility of the same filter surface also having parts dedicated simultaneously to filtration, washing, different degrees of filtration, etc. It is composed of an outer perimeter strip (1) with a zig-zag groove (4), an intermediate perimeter strip (2) with holes (6), which have radial walls (7), and concentric separation walls (8) of a stackable shape, and an inner perimeter strip (3) with a configuration similar to the outer strip (1).

The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.

The present invention discloses a method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.