A water purification device, including a first pressure cylinder, a second pressure cylinder, a first connecting piece and a second cylinder block arranged successively from bottom to top, and further comprising a first cylinder block arranged inside the second cylinder block. The first pressure cylinder and the second pressure cylinder both are open at one end and formed with a first through-hole at the other end; the first cylinder block and the second cylinder block both are open at two ends and arranged in a hollow shape. A water inlet, which is communicated with first flow passages formed between the first cylinder block and the second cylinder block, is formed on the second cylinder block, and a water outlet pipe, communicated with the first cylinder block, is inserted into an outer wall of the water purification device.

The present invention relates to a water treatment method including: a filtration step of feeding water to be treated to a membrane filtration device having loaded therein a porous separation membrane and performing filtration treatment to obtain filtrate; a discharging step of discharging the water to be treated in the membrane filtration device, which has been separated and concentrated by the porous separation membrane; and a cleaning step of cleaning the porous separation membrane by at least one treatment of physical cleaning and chemical cleaning, in which a cycle including a combination of the filtration step, the discharging step and the cleaning step is repeated multiple times, thereby obtaining filtrate. In each cycle, the filtration step and the discharging step are repeated multiple times, and the cleaning step is then carried out.

A connection mechanism for a suction device for vacuum membrane filtration applications, includes a support for receiving a membrane filter or a filtration base, a cavity formed below the membrane filter or the filtration base, a suction duct which opens centrally into the cavity, and a ventilation duct which opens laterally into the cavity. The connection mechanism further includes a closing element which can be moved into several switching positions and which can block or unblock both the suction duct and the ventilation duct depending on the switching positions.

The invention relates to a method for the processing of protein-containing suspensions or solutions, for example for concentrating or purifying the protein-containing particles or dissolved protein-containing substance contained in the suspensions or solutions, wherein the protein-containing suspensions or solutions are filtered by means of a filter module and the protein-containing particles or dissolved protein-containing substance retained in the filter module are conveyed out of the filter module by means of a backwashing fluid.

Algae harvesting and cultivating systems and methods for producing high concentrations of algae product with minimal energy. In an embodiment, a dead-end filtration system and method includes at least one tank and a plurality hollow fiber membranes positioned in the at least one tank. An algae medium is pulled through the hollow fiber membranes such that a retentate and a permeate are produced.

Provided herein are graphene materials, fabrication processes, and devices with improved performance and a high throughput. In some embodiments, the present disclosure provides graphene oxide (GO) materials and methods for forming GO materials. Such methods for forming GO materials avoid the shortcomings of current forming methods, to facilitate facile, high-throughput production of GO materials.

Methods and devices for producing a population of liposomes are provided. Aspects of the methods include applying a centrifugal force to a suspension of liposomes in a manner sufficient to pass the liposomes through a porous membrane to produce a population of liposomes. Aspects of the invention further include devices, systems and kits useful for performing the methods.

Devices, systems, and methods for continually degassing/venting a feedstream within a filtration system. The filtration system may include a filter device utilizing hollow fiber filters to filter the feedstream. Additional venting hollow fiber filters vent gas from the filtration system to outside the filtration system. The venting hollow fiber filters may have ends which expose the interior lumens thereof to outside the filter unit to vent gases which pass through the walls of the hollow fiber filters. Degassed permeate thus flows through the filtering hollow fiber filters.

A method for purifying a protein-containing solution comprising a protein of interest, the method comprising the steps of:

(a1) contacting the protein-containing solution with a porous medium comprising polyketone; and

(a2) passing the protein-containing solution contacted with the porous medium comprising polyketone through a virus removal membrane.

A method for purifying a boron nitride nanotube feedstock is disclosed, including an initial step of mixing a boron nitride nanotube (BNNT) feedstock with a solvent to form an initial mixture. This BNNT feedstock is made up of hexagonal boron nitride (h-BN) particles and less than about 50 weight percent BNNTs on a dry basis. This initial mixture is then sonicated within a treatment vessel using an ultrasonic probe. At least a portion of the initial mixture is filtered out of the treatment vessel and across a nanoporous membrane at the same as the sonication. In this manner, the method provides a filtrate which is enriched in h-BN particles relative to the initial mixture and a retentate which is enriched in BNNTs relative to the initial mixture.