A method of filtering fluid for injection into an injection well comprises detecting a fluid pressure in a conduit upstream of an actuator valve, verifying that the fluid pressure is within an operating pressure range, opening an actuator valve based on the verifying, receiving a fluid having suspended solids within a filter assembly in response to opening the actuator valve, actuating a pump in fluid communication with the filter assembly based on receiving the fluid within the filter assembly, and separating at least a portion of the suspended solids in the fluid within the filter assembly.

A high salinity water purification system and process, including a forward osmosis system and a reverse osmosis or nanofiltration system. A solids membrane separation system removes solids from the influent water being processed. A pervaporation (PV) system eliminates liquid impurities from the influent water being processed.

The present invention discloses an SWRO and MCDI coupled seawater desalination device system with energy recovery, including a pre-filtering unit, an SWRO treatment unit, an MCDI treatment unit, and a post-filtering unit. The SWRO treatment unit is coupled with the MCDI treatment unit. Seawater desalination is performed through a coupling complementary water passage and circuit design, while water quality is improved, and the continuity of water output from a water passage of the device is kept. By recovering the pressure potential energy of high-pressure brine in the SWRO treatment unit and electric energy released by desorption in the MCDI treatment unit, energy consumption is reduced.

TA method for treating an aqueous solution containing ammonium perchlorate and optionally nitrate ions, the method having a nitrification/denitrification sequence then a step of reducing perchlorates, the liquid effluent obtained at the end of this step of reducing perchlorates being subjected to a first membrane filtration, the liquid effluent obtained following this first membrane filtration being put into contact, in a reactor in aerobic conditions, with microorganisms able to carry out the oxidation of organic materials, then the liquid effluent leaving this reactor being subjected to a second membrane filtration, the first membrane filtration and the second membrane filtration being carried out on the same membrane filtration unit.

The invention relates to a device for membrane filtration and for the removal of micropollutants from liquids by way of a reactive substance, the device comprising a reaction chamber and at least one port for supplying and/or discharging the reactive substance to and/or from the reaction chamber, such that the micropollutants are able to react with the reactive substance in the reaction chamber and/or may be removed from a liquid, and the reaction chamber comprising a first membrane and a second membrane, the first membrane being designed as an inlet into the reaction chamber and the second membrane being designed as an outlet from the reaction chamber, such that the liquid to be treated is able to be filtered by the first membrane and to flow into the reaction chamber, the liquid treated with the reactive substance in the reaction chamber is able to be filtered by the second membrane and to flow out of the reaction chamber, and the outflow of treated liquid is substantially free from micropollutants.

A treatment method and system using high-frequency ultrasound for treating a waste stream containing per- and polyfluoroalkyl substance (PFAS) is disclosed. The system has one or more reactors including one or more transducers configured to operating at one or more frequencies to destroy or mineralize the per- and polyfluoroalkyl substances (PFAS) in the waste stream using sonolysis.

An ultrapure water manufacturing facility includes: a first tank; a plurality of reverse osmosis membranes sequentially arranged downstream of the first tank; an electrodeionization device arranged downstream of the plurality of reverse osmosis membranes; an ion exchange resin tower arranged downstream of the electrodeionization device and filled with a boron selective resin; and a chemical supplier arranged between the plurality of reverse osmosis membranes and configured to supply a pH regulator to treatment-target water.

An automated waste water treatment system includes a collection tank constructed to hold waste water, a first flow line connected to the collection tank to output the waste water from the collection tank, an electrocoagulation unit that receives the waste water and outputs the waste water as coagulated waste water, a polymer dosage tank to provide a polymer dosage to the coagulated waste water to produce and output flocculated waste water. An air grid of the electrocoagulation unit, the latter housing a plurality of electrodes, increases the lifespan and efficiency of the electrodes to perform electrocoagulation of the waste water. A clarifier connected to the flow line receives the flocculated waste water and produces sludge-free waste water and concentrated sludge, a series of filters to output filter-treated water, and an ultrafiltration system that receives filter-treated water and outputs ultrafiltration-treated water to a reverse osmosis system.

The water treatment device includes: a coagulation reaction tank into which the water to be treated is introduced; a coagulant supply unit that supplies the coagulant; a floatation separation tank that makes the agglomerates float on the upper layer of the treated water to perform solid-liquid separation; and a coagulant addition amount adjustment device which adjusts the addition amount of the coagulant from the coagulant supply unit and adds the coagulant to the coagulation reaction tank. The coagulant addition amount adjustment device includes: a detection part for detecting the turbidity of the treated water inside the floatation separation tank; and an adjustment part for adjusting, on the basis of the detection value of the detection part, the amount of the coagulant added to the water to be treated. A detection unit of the detection part is installed inside the floatation separation tank.

A membrane distillation apparatus includes a housing and an impeller. The housing includes a hot medium compartment, a cold medium compartment, a permeate gap compartment, a membrane, and a thermally conductive plate. The hot medium compartment includes a hot medium inlet configured to receive a hot medium stream including water. The cold medium compartment includes a cold medium inlet configured to receive a cold medium stream. The membrane defines pores that are sized to allow water vapor originating from the hot medium stream to pass from the hot medium compartment through the membrane to the permeate gap compartment. The thermally conductive plate and the cold medium stream are cooperatively configured to condense the water vapor from the hot medium stream. The permeate gap compartment includes a permeate outlet configured to discharge the condensed water vapor. The impeller is disposed within the permeate gap compartment.