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

The present invention relates in general to the field of water kiosks, and more specifically, to an emergency water filtration kiosk and method of delivering clean and safe water using the emergency water filtration kiosk. One aspect of the emergency water filtration kiosk and method of use may include a four-stage water filtration system to better purify, clean, and improve the taste of water. The emergency water filtration kiosk and method of use may further include a turn-key variable pump system that is configured to supply water to the emergency water filtration kiosk via three alternative power sources. The purpose of the invention is to provide a self-contained and rapidly deployable emergency response water filtration kiosk and method of use that delivers clean and safe drinking water to people in need after a natural disaster. An additional purpose of the invention is to provide an emergency water filtration kiosk and method of use that offers a wide variety of on-board integrated pumping solutions to supply water to the filtration kiosk under any power condition.

Methods, systems, and devices for water treatment or for preventing fouling of components of water treatment systems can include the upstream introduction of nanobubbles in-line and/or in close proximity to a reverse osmosis membrane in the water treatment system. The nanobubbles can bind to and cluster (flocculate) nanoparticles (and possible larger solid particles) so that they can be removed and not foul water purification components such as reverse osmosis membranes. The nanobubbles can also interact with and change some characteristics of nanoparticles and thereby reduce fouling of some system components, such as reverse osmosis membranes, or other components. The systems, methods, and devices disclosed herein can help produce potable water safe for human consumption in a more cost-effective manner, e.g., by reducing maintenance costs and in some cases manufacturing costs.

A filtration apparatus for treating a fluid comprises a vessel, a first partition plate dividing the vessel into first and second chambers and defining a through hole, and a filtration module located within the second chamber and including a body section defining an outer diameter which is greater than the diameter of the through hole in the first partition plate. The apparatus further comprises a reducing connector having a first end secured to the body section of the filtration module and a second end sealed relative to the through hole in the first partition plate to permit communication between the filtration module and the first chamber.

In a disclosed embodiment the apparatus includes a second partition plate such that the vessel is divided into first, second and third chambers, wherein the filtration module is mounted between the partition plates.

Disclosure relates to an electrochemical membrane degassing apparatus including a liquid channel in which raw water flows, a gaseous channel in which gas degassed from the raw water flows, a gas separation membrane allowing gas in the raw water to be moved to the gaseous channel, a surface modification layer formed at the gas separation membrane, and a power supply unit applying power to the surface modification layer, and selectively operated in either of a first process mode applying a low voltage power and a second process mode applying a high voltage power, wherein in the first process mode, an electrostatic repulsive force is generated between the surface modification layer and organic particles, and in the second process mode, a radical is generated, and the organic particles is oxidized by the radical. Accordingly, the efficiency of membrane degassing can be improved and membrane contamination can be prevented.

Provided is a method for washing a hollow fiber membrane module which comprises a hollow fiber membrane for filtering raw water containing a suspended component, said method comprising, in the following order, a first washing step for removing a suspended component that is accumulated on the hollow fiber membrane and a second washing step for carrying out an air scrubbing process in which gas is caused to pass through at least to the raw water side of the hollow fiber membrane, wherein, out of water that existed in the hollow fiber membrane module before washing, water in an amount corresponding to not less than 50 vol % of the capacity of the hollow fiber membrane module is removed in the first washing step.

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 filtration apparatus (10) for treating a fluid comprises a vessel (12), a first partition plate (18) dividing the vessel into first and second chambers (22, 26) and defining a through hole (40), and a filtration module (30) located within the second chamber (26) and including a body section (32) defining an outer diameter which is greater than the diameter of the through hole (40) in the first partition plate (18). The apparatus (10) further comprises a reducing connector (36) having a first end secured to the body section (32) of the filtration module (30) and a second end sealed relative to the through hole (40) in the first partition plate (18) to permit communication between the filtration module (30) and the first chamber (22). In a disclosed embodiment the apparatus (10) includes a second partition plate (20) such that the vessel is divided into first, second and third chambers (22, 24, 26), wherein the filtration module (30) is mounted between the partition plates (18, 20).

Provided is a gas separation device configured to separate a non-hydrocarbon gas from a feed gas containing the non-hydrocarbon gas through use of a gas separation membrane, in which a decrease in operating rate can be suppressed, and economic efficiency is satisfactory. A first membrane module (1) and a second membrane module (2) are arranged in parallel to each other with respect to supply lines for a feed gas. Gas lines for regeneration (14, 15) ((24, 25)), which are branched from a permeate gas line (13) ((23)) of the membrane module (1) ((2)), and which are joined to a feed gas line (21) ((11)) configured to supply the feed gas to the membrane module (2) ((1)), are provided. Under a state in which the feed gas is supplied to the membrane module (1), a permeate gas through the membrane module (1) is supplied, as a gas for regeneration, to the membrane module (2) through the gas lines for regeneration (14, 15). In this case, the membrane module (2) is brought into a non-operation state, and the membrane module (2) is regenerated.

Systems and methods for exchanging buffer solutions are disclosed. In accordance with some embodiments, the methods and systems for buffer exchange may be automated and/or the methods and systems may include mixing during filtering operations.