It is to intermittently and effectively generate large bubbles in a liquid phase. A bubble generation device 1 intermittently generates large bubbles a2 in a liquid phase. The bubble generation device 1 includes a bubble storing container 3, a pivot 4, and a pair of edge portion receivers 5a, 5b. The bubble storing container 3 stores bubbles a1 generated by a gas supply nozzle 2 in the liquid. The pivot 4 allows the bubble storing container 3 to pivot thereon, thereby releasing the large bubbles a2 from the bubble storing container 3. The pair of edge portion receivers 5a, 5b receives and blocks an edge portion of the bubble storing container 3 to limit pivot of the bubble storing container 3. An inside of the bubble storing container 3 is partitioned by a partition 30 that is installed in an axial direction of the pivot 4.

A filtration unit for purifying or treating fluid that includes one or more membrane units having a permeate section. The permeate section of the membrane units is fed fluid that passes through a sealing insert having a fluid inlet and a passage that discharges in fluid communication with the permeate section. The sealing insert is arranged in a support frame of the membrane unit to form a fluid channel for delivering fluid through the insert and along an outer perimeter surface that maintains performance of the membrane unit during operation.

The proposed prefabricated filtration module (10) is provided for a modular filtration system, in particular a cross-flow filtration system, for low-volume screening applications. The prefabricated filtration module (10) includes fluid ports (24) and a plurality of components adjusted to low-volume screening applications, which are firmly integrated into the filtration module (10). The entire filtration module (10) is designed as a single-use filtration module.

Provided is a method of washing a hollow fiber membrane device which can efficiently remove fine particles while limiting the impact of an ultrapure water production system on the starting time. The method of washing a hollow fiber membrane device includes washing a hollow fiber membrane device with an alkaline aqueous solution before the hollow fiber membrane device is installed in an ultrapure water production system. The hollow fiber membrane device is washed by means of a washing device that is different from the ultrapure water production system.

The level of cleanliness of a hollow fiber membrane device is evaluated before it is installed in an ultrapure water production system. A method of evaluating the level of cleanliness of the hollow fiber membrane device includes capturing fine particles in permeating water by means of a first filter membrane, wherein the permeating water is ultrapure water that permeates through the hollow fiber membrane device before the hollow fiber membrane device is installed in an ultrapure water production system; and analyzing the fine particles that are captured by the filter membrane.

A fixed or mobile water treatment system comprises a primary screening tank that filters wastewater to remove inorganic and organic pollutants from the wastewater, and includes an electro-coagulation unit that provides an electrical charge to wastewater exiting the primary screening tank, ultraviolet light and oxidation processes in one or more settling tanks that remove pollutants from the wastewater, and one or more filters that remove pollutants from the wastewater.

Apparatus and method for semi-permeable membrane cleaning in particular, applying series of pulsed water stroke, made simultaneously with osmosis backward flow causing superposed membrane directional shaking and fouling detachment. Pulsed water stroke provided by water stroke generator as several momentum sharp changes in gauge pressure and induce velocity pulse of residual brine flow. The pulsed water strokes ideally induce resonance in the membrane. Osmosis backward wash may be provided either by injection for predetermined injection time, additional solution selected in such way that net driving pressure be-comes opposite to normal osmotic operation thereby providing a backward flow of permeate towards to the side opposite to normal operation mode, so as to lift said foulant, or by throttling permeate exiting from the permeate enclosure, until the net driving pressure value become equal to zero, during application of precise synchronized and opposing brine and permeate pressure strokes thereby providing a plurality of quick RO-FO-RO process changes. These procedures allow a membrane to be kept continuously clean and operate at higher recovery.

The invention discloses an automatic off-line gas-water combined-washing membrane bioreactor, comprising a PLC automation control cabinet, a MBR reactor, a MBR membrane assembly, a rotating hood, an annular guide rail, a lifting device, a washing pipe network, an external interface, a gas washing pipe, a water washing pipe, a gas pump and a water pump, wherein the gas pump, the water pump and the three-way change valve are all connected with the PLC automation control cabinet, the washing pipe network is provided with several nozzles. The present invention adopts a full PLC automation control system, the PLC automation control cabinet controls a pressure washing pump (gas pump and water pump), and gas or water is injected into the washing pipe network by flexibly adjusting the three-way change valve, so that the operation is simple, the cleaning is complete, and the manual operation load is reduced.

An apparatus and method for cleaning and restoring air separation modules (ASMs). The present invention cleans and restores ASMs that comprise a gas permeable fiber module that uses a fiber composition in the polyimide hollow fiber family. The present invention removes contaminants, such as fuel, from an ASM by blowing air at environmental temperature into the ASM, and then restores the ASM by blowing hot air into the ASM.

Embodiments herein relate to a membrane bioreactor for strengthening membrane fouling control and method thereof. The embodiments may solve problems associated with existing techniques in the field of water treatment. The membrane bioreactor may include a reactor wall, a membrane element, a collecting pipe, a water collecting pipe, a vacuum table, a suction pump, a cleaning unit, an air compressor, an aeration pipe, an aeration head, an inlet pipe, and a drain pipe. The existing techniques related to membrane fouling control has problems such as complexity to operate, difficulties to clean online, and uses of chemicals, which may cause secondary pollution. The embodiments relate to a device that includes a set of automatic mechanical transmission units. With cleaning parts installed at terminals of the device, the surface of the pollution layer of the flat membrane may be cleaned periodically to achieve in situ membrane fouling control, an increase of water production capacity and backwash cycle, and improvement of the efficiency of the membrane bioreactor.