Provided are a plate-type filter module for water treatment and a filter assembly for water treatment comprising the same. The plate-type filter module for water treatment according to one embodiment of the present invention comprises: a plurality of filter units having a predetermined area and formed in a plate shape; a block frame to which the plurality of filter units is engaged so that the filter units are kept parallel to each other; and a collecting/receiving tube fixed on one side of the block frame and including a plurality of first fittings respectively connected to the plurality of the filter units to allow filtered water produced in the filter units to be introduced thereinto and at least one second fitting for discharging the filtered water introduced through the plurality of first fittings to the outside.

There is provided a film separation device 1 equipped with a treatment tank 2 receiving a liquid to be treated, a film unit 3 to be immersed in the liquid to be treated, and a guide mechanism 4. The guide mechanism 4 is composed of holding sections 14 and a guide section 15. The holding sections 14 are provided on a side section of a film cassette 5 constituting the film unit 3, and the guide section 15 is fixed to the treatment tank 2. The guide section 15 has a tank-wall fixed section 15a, an upper extension section 15b, a held section 15c, a lower extension section 15d, and a tank-bottom fixed section 15e. When fixing the film unit 3 to the treatment tank 2, the holding sections 14 are fitted to the held section 15c, thereby guiding the film unit 3 to a predetermined position in the treatment tank 2.

The outer edge of a filtration membrane is thermally welded to a filter plate by a first thermal welding part. The first thermal welding part includes an outer boundary line disposed inside an outer edge of the filter plate and an inner boundary line disposed inside the outer boundary line. The outer boundary line has a plurality of first projected portions and first recessed portions that are alternately formed. The first projected portion projects toward the outer edge of the filter plate, and the first recessed portion is formed between the first projected portions and retracts in an inward direction A opposite to the outer edge of the filter plate.

A membrane element includes a filtration membrane and a flowpath member joined thereto. The flowpath member is made of yarn arranged into a three-dimensional structure, and includes inner spaces through which a permeated liquid permeated through the filtration membrane flows, and an outer bonding surface joined to the filtration membrane. At least part of the yarn forming the outer bonding surface is a low-melting point yarn having a softening point lower than that of a material forming the filtration membrane, or the yarn forming the outer bonding surface is formed by twisting a plurality of constituent yarns, and at least one of the constituent yarns is a low-melting point yarn having a softening point lower than that of the material forming the filtration membrane.

In a waste water treatment method using membrane separation-activated sludge, when, during filtration while supplying air using an immersion-type membrane separation unit loaded with multiple flexible membranes, the filtration differential pressure of the membranes at a set filtration flow rate exceeds a specified value P2 with respect to the filtration differential pressure P1 of the initial period of operation, membrane filtration is continued with air supply stopped until the filtration differential pressure P3 becomes P3P1+20 [kPa]. Then with the filtration flux or filtration pressure being smaller or negative compared to when filtering while supplying air, air is supplied and after the filtration differential pressure P4 during filtration reaches P4P1+5 [kPa], filtration is returned to filtration while supplying air.

A flat filter for water treatment is provided. The flat filter for water treatment according to one embodiment of the present invention comprises: filtration members formed in the shape of a plate having a predetermined area; support frames, which are coupled to the rim sides of the filtration members so as to support the filtration members, and have channels into/in which filtered water produced through the filtration members flows and moves; and gap adjustment members coupled to the support frames so as to adjust the gap between the filtration members adjacent to one another.

Cassettes for tangential flow filtration (TFF) are disclosed which reduce assembly and disassembly required for aseptic filtration. Packaging systems and methods for the TFF cassettes are also disclosed.

The present disclosure is directed to ion-exchange systems and devices that can monitor key parameters related to the performance of the ion-exchange device. Specifically, the ion-exchange systems and devices disclosed herein can provide real time voltage drop across groups of membrane pairs using diagnostic spacer borders between the pairs. In addition, the ion-exchange systems and devices disclosed herein can monitor the compression force applied by the compression plates holding the ion-exchange systems and devices together.

A flat filter for water treatment is provided. The flat filter for water treatment according to one embodiment of the present invention comprises: filtration members formed in the shape of a plate having a predetermined area; support frames, which are coupled to the rim sides of the filtration members so as to support the filtration members, and have channels into/in which filtered water produced through the filtration members flows and moves; and gap adjustment members coupled to the support frames so as to adjust the gap between the filtration members adjacent to one another.

Elastic microfiltration membranes are provided. These membranes may be used in a membrane bioreactor. Due to the elastic nature of the membranes, removal of fouling materials is improved, thereby increasing the efficiency and longevity of the membranes. Methods for forming such membranes and uses of the membranes are also provided, including their use in membrane bioreactors.