Abstract:
A reverse osmosis system in fluid communication with a fluid reservoir and a method of operating the same includes a pressure vessel having a membrane therein, a high pressure fluid input, a low pressure fluid input, a permeate output and a brine output. The system further includes a high pressure valve, a low pressure valve and a high pressure pump in fluid communication with the high pressure input through the high pressure valve. The system also includes a low pressure pump in fluid communication with the low pressure input through the low pressure valve. The high pressure pump and the low pressure pump are in fluid communication with the fluid reservoir. The low pressure pump initially fills the pressure vessel and the high pressure pump operates during permeate production.
Abstract:
The purpose of the present invention is to provide a seawater pre-treatment apparatus capable of favorably growing and maintaining biofilms in multiple series-connected filters by appropriately supplying nutrient components to the respective filters. The present invention relates to a seawater pre-treatment apparatus, which is used when desalinating by removing salts in the seawa - ter. The seawater pre-treatment apparatus is characterized in being provided with: a supply pipe (21) for supplying the seawater; multiple filters (16), which have a particulate filter material and a biofilm; connecting pipes (23) for connecting the multiple filters in series; multiple bypass pipe (24) for connecting each of the multiple filters to the supply pipe; and respective multiple adjustment valves (26) provided on the multiple bypass pipes to adjust flow rate.
Abstract:
A sea water harvesting process includes the steps of collecting sea water, filtering the sea water, passing the filtered sea water through a high-pressure reverse osmosis membrane to separate the sea water into de-salinated water and concentrated sea water, delivering the concentrated sea water to an evaporator, heating the concentrated sea water in the evaporator under vacuum to produce calcium sulphate, sea salt and a super-concentrated sea water. Downstream of the evaporator the super-concentrated sea water is heated to produce a concentrated mineral liquor containing sea minerals in a concentration of about 42%.
Abstract:
Provided are a water treatment system and a water treatment method with which salt-containing water can be recycled with a high water recovery rate. In this water treatment system (400) and water treatment method, a scale inhibitor and a silica-scale inhibitor are supplied to water to be treated including Ca ions, SO 4 ions, carbonate ions, and silica, and the water to be treated is subsequently separated by a second desalination unit (210) into treated water, and second concentrated water in which the Ca ions, SO 4 ions, carbonate ions, and silica are concentrated. In a second crystallization unit (220), gypsum seed crystals are supplied to the second concentrated water, and gypsum crystallizes and is removed from the second concentrated water.
Abstract:
Disclosed herein are systems and methods for desalination of salt water based on an engineered acoustic field that causes constructive and destructive interference at pre-computed spatial positions. The engineered acoustic field can cause high-pressure and low-pressure regions where desalination membranes are located. The induced pressure from the acoustic field can force pure water through the membranes leaving ionic and dissolved molecular species behind.
Abstract:
A membrane seawater desalination pressurization and energy recovery integrated method. Piston rods of single-rod piston-type seawater cylinders are connected with single-rod piston-type hydraulic cylinders to form two or more than two working combined bodies which operate alternately. In a process that the hydraulic cylinders drive the seawater cylinders to move back and forth, one piston cavity of a seawater cylinder sucks high pressure condensed brine in the process of moving forward and drains the high pressure condensed brine in the returning process; and the other piston cavity of the seawater cylinder sucks raw seawater in the returning process, pressurizes the raw seawater in the process of moving forward and continuously and stably outputs the pressurized high pressure raw seawater to a reverse osmosis membrane module. Meanwhile, a membrane seawater desalination pressurization and energy recovery integrated device is further disclosed.
Abstract:
Provided are a water treatment system and a water treatment method with which salt-containing water can be recycled with a high water recovery rate. In this water treatment system (1) and water treatment method, a scale inhibitor is supplied to water to be treated including Ca ions, SO 4 ions, carbonate ions, and silica, and the water to be treated is adjusted to a pH capable of dissolving silica. Having had a calcium-scale inhibitor added thereto and the pH thereof adjusted, the water to be treated is separated by a desalination unit (10) into treated water, and concentrated water in which the Ca ions, SO 4 ions, carbonate ions, and silica are concentrated. In a crystallization unit (20), gypsum seed crystals are supplied to the concentrated water, and gypsum crystallizes and is removed from the concentrated water. The silica in the water to be treated is removed from the concentrated water at a downstream side of the crystallization unit (20) with respect to the water to be treated. Calcium carbonate in the water to be treated is removed from the concentrated water at an up-stream side of the desalination unit (10), or at a downstream side of the crystallization unit (20).
Abstract:
The present invention relates to the preparation of novel antibiofouling Thin Film Composite (TFC) Reverse Osmosis (RO) membranes on porous polysulfone (PSf) support of thickness 30-40 micron. TFC-RO membranes were prepared by interfacial polymerization between neat m-phenylenediamine (MPD) in water and pyridine tricarboxylic acid chloride (PTC) or a mixture containing PTC and trimesoyl chloride (TMC) in mixture of hexane+dichloromethane. The best results in terms of flux, NaCl rejection and antibiofouling property were obtained with 2:3-1:1 weight ratio of PTC to TMC. The present invention also relates to the preparation of antibiofouling TFC membranes by the interfacial polymerization between mixture of melamine+MPD and TMC. The best results in terms of antibiofouling property, NaCl rejection and flux were obtained with 1:1 weight ratio of MPD to melamine.
Abstract:
Disclosed herein are forward osmosis (FO) membranes comprising polyaniline. Methods of making the membranes, including methods of tuning the properties of the membranes by post-casting treatments, and methods of using the membranes in FO applications are also described.
Abstract:
This water treatment system is provided with: a reverse osmosis membrane device (2); a biofilm treatment device (4) that has a carrier, on a surface of which is formed a biofilm, and that treats water to be treated (3) before the water to be treated (3) is transmitted through the reverse osmosis membrane device (2); and at least one of a water to be treated stoppage period circulation means (7) and a water to be treated stoppage period supply means (8) that are driven when the intake of new water to be treated (3) is stopped. The water to be treated stoppage circulation means (7) supplies and circulates water to be treated (3) from a water to be treated discharge outlet (4a) side of the biofilm treatment device (4) to a water to be treated supply port (4b) side. The water to be treated stoppage period supply means (8) supplies new water to be treated (3) to the biofilm treatment device (4).