The present invention relates to an electrochemical advanced oxidation process combined with a membrane in which electrode reactions and membrane filtration occur simultaneously, a water treatment device based on the electrochemical advanced oxidation process, and a water treatment system using the water treatment device. The electrochemical advanced oxidation process includes: providing a membrane electro-oxidation tank where electrodes are combined with a membrane; accommodating wastewater containing pollutants in the membrane electro-oxidation tank; and supplying power to the electrodes to decompose the pollutants and simultaneously separating particles through the membrane (water treatment). The electrodes are arranged downstream of the membrane. Gases released from the electrodes induce a vertical flow of the fluid to improve the contact efficiency between a reactive solution and the electrodes and remove the pollutants attached to the surface of the membrane. According to the present invention, a mechanism of decomposing pollutants using the electrodes and a mechanism of separating particles through the membrane take place simultaneously, enabling effective removal of the pollutants. The electrodes are arranged downstream of the membrane. With this arrangement, gases are produced from the electrodes to improve the electrolysis reactivity and the filtration efficiency of the membrane.

A hollow fiber membrane filtration device includes a hollow fiber membrane module including a vessel that includes a treated water outlet and a concentrated water outlet, hollow fiber membranes, an upper end fixing member that fixes upper end parts of the hollow fiber membranes, a permeated water chamber that is formed on an upper side of the upper end fixing member, a water conduit through which raw water is supplied into the vessel, and a diffusion tube that is provided on a lower side of the hollow fiber membranes. A plurality of ejection holes are provided on a side peripheral surface of the water conduit. A raw water pipe and gas introduction device are connected with the water conduit. A drainage port is provided at a lower part of the vessel.

A gas sparger produces an intermittent flow of bubbles even if provided with a continuous gas flow. The sparger has a housing to collect a pocket of gas and a conduit to release some of the gas from the pocket when the pocket reaches a sufficient size. Optionally, a cover over an outlet from the conduit may break up or distribute the released gas. A large sparger for use with a commercial membrane module can comprise a plurality of smaller units.

This membrane separation device includes: an organic substance concentration measurement means which measures the organic substance concentration in the treatment target water; a pressure measurement unit which measures a transmembrane pressure of the separation membrane; transmembrane pressure increase speed comparing means which compares a transmembrane pressure increase speed selected on the basis of the value of the organic substance concentration measured by the organic substance concentration measurement means, with a transmembrane pressure increase speed calculated from the transmembrane pressure measured by the pressure measurement unit; and a control unit which controls the membrane surface aeration flow amount of the membrane surface aeration device, wherein the control unit changes the membrane surface aeration flow amount on the basis of the difference between the transmembrane pressure increase speeds, obtained by the transmembrane pressure increase speed comparing means.

A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.

A detonator positioning device for use with a wireless detonator in a perforating gun assembly includes a single mechanism for physical electrical connection, while the remaining electrical connections are made via electrically contactable components.

The present invention discloses a purification method for purifying contaminated water, comprising at least one biological purification path as well as a filtration purification path, wherein the filtration purification path is operated at least partially in parallel to the biological purification path with a partial flow which is removed from the biological purification path. The purification method according to the invention can be used as, preferably last, stage of a purification process in a wastewater treatment plant prior to introducing the purified water into a river, lake or the ocean.

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.

A siphon-type air diffusion device for intermittently performing aeration, comprising: at least two siphon-type air diffusion pipes; and an air supply member that supplies air to the siphon-type air diffusion pipes, wherein the siphon-type air diffusion pipe includes a siphon chamber which includes a first siphon chamber and a second siphon chamber on the downstream side of the first siphon chamber, a communication portion which communicates the first siphon chamber and the second siphon chamber with each other, an air diffusion hole which is provided on the downstream side of the siphon chamber, a path which extends from the siphon chamber to the air diffusion hole, and a treatment water inlet which is provided on the upstream side of the siphon chamber, wherein the air supply member includes a distribution pipe which extends in an arrangement direction of the siphon-type air diffusion pipe, and an introduction portion which is branched from the distribution pipe and includes at least one air supply port supplying air to the siphon-type air diffusion pipe, wherein the distribution pipe is provided above the air supply port, and wherein in the air supply port of the introduction portion, the air supply port located at the uppermost position in the vertical direction is provided below a lower end of a partition wall dividing the siphon chamber and the path.

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.