822results about "Water softening" patented technology

The disclosure relates to an intelligent dosing control method, device and system for softening and removing hardness. Based on calculation by the intelligent dosing control method or device for softening and removing hardness of the disclosure, a softening agent dosing scheme can be intelligently recommended, while allowing the dosage adjustment in real time, thereby realizing the real-time and precise dosing of agents throughout the process. The intelligent dosing control system for softening and removing hardness of the disclosure automatic monitors the inlet water quality, and the dosing device can be controlled to perform precise dosing of agents through the calculation by the intelligent dosing control method or device for softening and removing hardness. Based on the monitoring feedback of outlet water quality and then calculation by the intelligent dosing control method and / or device for softening and removing hardness, the agent dosage can be automatically readjusted.

Methods, systems and devices for removing iodide from an aqueous solution including submerging an iodophilic electrode in an aqueous solution containing iodide, applying a current to the electrode, and electrochemically oxidizing the iodide to iodine within the electrode. The electrode may include an iodophilic material and an electrically conductive material. It may also include a binder. The iodophilic material may be a starch, chitosan, carboxycellulose, cationic polymer, or an anion exchange membrane material, for example. After oxidizing the iodide to iodine within the electrode, the electrode may be submerged in a second solution and a current may be applied to reduce the iodine and release it from the electrode in the form of iodide into the second solution.

The invention belongs to the field of oil and gas field high-salinity wastewater treatment, and particularly relates to a shale gas high-salinity wastewater electrochemical catalysis coupling membrane separation low-carbon treatment method which comprises the treatment steps of pretreatment, electrocatalytic oxidation, membrane separation, salt recycling and product recovery, intelligent management and control, energy coupling and the like. The dissolved air flotation unit generates micro-nano bubbles through a venturi-rotational flow coupling device and cooperates with PAC / PAM to realize efficient flotation; softening agents are added into the multi-stage sedimentation tank by stages, closed-loop control is carried out, and soluble barium, boron, fluoride and hardness are removed; the electrochemical oxidation unit strengthens mass transfer through ultrasonic waves and degrades organic matters difficult to treat; the membrane treatment realizes up-to-standard discharge of wastewater through a hollow fiber membrane bioreactor-roll type ultrafiltration membrane-anti-pollution type reverse osmosis membrane integrated system; the magnetic control evaporation crystallizer utilizes the magnetic field gradient and the temperature gradient to cooperatively regulate and control the crystallization process, the membrane separation strong brine is subjected to quality separation treatment, and high-purity salt products are produced. The method provided by the invention can effectively realize up-to-standard discharge treatment of shale gas fracturing flowback wastewater and resource utilization of evaporative crystallization salt, is also suitable for treating shale gas recovery wastewater with similar water quality characteristics, and has good popularization and application prospects.

The invention relates to a power plant boiler make-up water source treatment device which comprises a first pipeline mixer, a second pipeline mixer and a main reactor which are sequentially connected, the first pipeline mixer is connected with a first alkaline dosing device, and the second pipeline mixer is connected with a second alkaline dosing device and a coagulant dosing device; the main reactor internally comprises an enhanced reaction part, an inclined tube separation part and a sludge scraper, the enhanced reaction part is located at the middle upper part of the center of the main reactor and comprises an inner cylinder and an outer cylinder, the second pipeline mixer is connected into the inner cylinder through a water inlet pipe, and the flocculant dosing device is connected into the inner cylinder through a pipeline; the top of the inner cylinder is open and communicated with the inner space of the outer cylinder, the top of the outer cylinder is higher than the liquid level of the main reactor, and the bottom of the outer cylinder is open, so that inlet water of the inner cylinder sequentially flows through the inner cylinder and the outer cylinder; an inclined tube separation part is arranged on the outer side of the enhanced reaction part and is positioned at the upper part of the main reactor, and the sludge scraper can rotate to promote sludge discharge at the bottom of the main reactor.

The invention discloses an electrochemical descaling process ion concentration dynamic balance control method and system, and relates to the field of water treatment of a circulating cooling water system.The method comprises the steps that a multi-parameter sensor is deployed to collect calcium and magnesium ion concentration, pH, conductivity, flow and other multi-dimensional data in real time, and an electrochemical deposition dynamic model is combined; dynamically evaluating the time sequence change trend of the ion concentration; according to the method, an ion concentration dynamic balance control algorithm is constructed, and the current density adjusting quantity is calculated by synthesizing ion concentration deviation and historical integral deviation, so that the target current density of the electrochemical reactor is adaptively adjusted, and the system is always maintained in a target concentration interval under different inlet water quality and load conditions; precise electrolysis control is achieved by periodically adjusting power output, and the descaling efficiency and energy consumption are effectively balanced. Therefore, the self-adaptive adjustment of the electrochemical descaling process is realized, and the stability and the self-adaptability of the descaling process are remarkably improved.

The invention provides an iron and steel enterprise high-salt wastewater and high-salt solid waste collaborative resource utilization system which is characterized in that firstly, non-magnetic fly ash in sintering machine head fly ash is screened out through a pretreatment module; carrying out multi-stage washing and filter pressing treatment on slurry obtained by mixing the non-magnetic dedusting ash, the blast furnace gas condensate water and the strong brine of the desalting water station through a multi-stage washing and filter pressing module to obtain multi-stage washing ash and multi-stage ash washing brine; finally, carrying out purification and separation treatment on the multi-stage ash washing brine through a purification and separation module to obtain industrial-grade NaCl, industrial-grade KCl and devitrification mother liquor; according to the method, non-magnetic fly ash, blast furnace gas condensate water and strong brine of a desalting water station are used as raw materials, the problem of enrichment of alkali metal and chloride ions in a sintering machine system is solved through a series of co-processing technologies, and meanwhile industrial-grade NaCl and industrial-grade KCl are extracted from the blast furnace gas condensate water and the strong brine of the desalting water station. Therefore, the resource utilization rate is improved, and benefits are increased for iron and steel enterprises.

The invention belongs to the field of oil and gas field wastewater treatment, and particularly relates to a shale gas fracturing flowback wastewater treatment system and method, and the system comprises treatment units such as adjustment homogenization, dissolved air flotation, multi-stage chemical precipitation, coagulation separation, electrochemical catalytic oxidation, membrane treatment and magnetic control evaporative crystallization. The dissolved air flotation unit generates micro-nano bubbles through a venturi-rotational flow coupling device and cooperates with PAC / PAM to realize efficient flotation; softening agents are added into the multi-stage sedimentation tank by stages, closed-loop control is carried out, and soluble barium, boron, fluoride and hardness are removed; the electrochemical oxidation unit strengthens mass transfer through ultrasonic waves and degrades organic matters difficult to treat; the membrane treatment realizes up-to-standard discharge of wastewater through a hollow fiber membrane bioreactor-roll type ultrafiltration membrane-anti-pollution type reverse osmosis membrane integrated system; the magnetic control evaporation crystallizer utilizes the magnetic field gradient and the temperature gradient to cooperatively regulate and control the crystallization process, the membrane separation strong brine is subjected to quality separation treatment, and high-purity salt products are produced. The method provided by the invention can effectively realize up-to-standard discharge treatment of shale gas fracturing flowback wastewater and resource utilization of evaporative crystallization salt, is also suitable for treating shale gas recovery wastewater with similar water quality characteristics, and has good popularization and application prospects.

Methods, systems and devices for PFAS destruction including adding a sulfite salt to an aqueous solution containing PFAS and then irradiating the aqueous solution with light at 222 nm. The method may include adding a base to the aqueous solution in an amount sufficient to raise a pH of the aqueous solution including PFAS to about 10 or more. It may also include adding a halide salt such as a bromide salt or an iodine salt, and further adding a carbonate. Greater than 90%, or greater than 99%, of the PFAS in the solution may be destroyed by irradiating the aqueous solution in this way.

The invention relates to the technical field of wastewater treatment, in particular to a method for cooperatively treating petrochemical wastewater based on porous carbon and micro-nano bubbles, which comprises the following steps: S1, pretreating the petrochemical wastewater; s2, carrying out micro-nano aeration on the pretreated petrochemical wastewater by adopting a micro-nano bubble generation device to obtain aerated wastewater; s3, the aerated wastewater is subjected to adsorption treatment through modified porous carbon, purified wastewater is obtained, and the modified porous carbon is biomass porous carbon loaded with rose red ammonium tricarboxylate. According to the invention, through a cooperative treatment process of pretreatment, micro-nano bubble oxidation and modified porous carbon adsorption, efficient removal of multiple types of pollutants (including refractory organic matters, heavy metals and suspended particulate matters) is realized, the wastewater treatment efficiency is improved, and the operation cost is reduced.

Methods, systems and devices for PFAS destruction including oxidatively pretreating an aqueous foam fractionate solution including PFAS to form a pretreated solution by mixing the aqueous foam fractionate solution with a persulfate and an acid or a base to increase or decrease the pH and oxidizing the aqueous foam fractionate solution and then subjecting the pretreated solution to UV photolysis, such as by directing UV light onto the pretreated aqueous foam fractionate solution at 222 nm, 254 nm and / or 185 nm. Oxidizing the foam fraction may include subjecting the aqueous foam fractionate solution to an increased temperature and pressure for a period of time sufficient for thermal oxidation or subjecting the aqueous foam fractionate solution to ozone oxidation.

The invention relates to the technical field of industrial production wastewater treatment, and particularly provides a resource utilization method of calcium chloride high-salt water containing high-concentration organic matters. The method comprises the steps of pretreatment, wet catalytic oxidation, salt type conversion, softening filtration, deep oxidation, nanofiltration purification and targeted adsorption, no residual mother liquor exists, no secondary pollution is generated, organic matters in effluent are stable and reach the standard, the water quality and water quantity fluctuation resistance is high, heterogeneous and homogeneous catalysts are combined for catalysis, and the purification effect is good. According to the method, the sodium chloride solution is used as a raw material, the homogeneous catalyst is recycled, in addition, most of salt in the homogeneous catalyst is also recycled, resource reutilization is fully achieved, the treatment cost is reduced, and the treated sodium chloride solution can be used as primary saline water for subsequent ion membrane electrolysis.

The invention relates to the technical field of wastewater treatment in the water treatment technology, in particular to a wastewater treatment multistage dynamic quantification control system based on result feedback, which comprises a storage module, an identification module, a quantification module and an execution module, the storage module stores a causal chain in a reaction process, the identification module identifies a matching state of a current operation parameter and the causal chain and enables the quantification module to determine a risk index, and the execution module performs control optimization to execute corresponding measures based on the determined risk index. Tracking intervention from a pollution source to a derivation phenomenon is realized, a pollution migration problem implied in wastewater treatment is converted into an identification item of quantitative operation, and limitation of traditional single-point identification control is broken through through sequential logic verification and a multi-dimensional matching degree fusion mechanism. The accuracy of membrane pollution prevention and control and the resource utilization efficiency are improved while the process continuity is guaranteed, and a closed-loop control normal form of traceability pre-judgment dynamic quantification grading interception is formed.

The utility model provides a softening and hardness-removing device system for high-salinity wastewater. The device system comprises a reaction unit, a dosing unit and a central control unit, the reaction unit comprises a water inlet pipeline, a precipitation reactor and a water outlet pipeline which are connected in sequence; the water inlet pipeline is provided with a first detection module, the precipitation reactor comprises a plurality of purification monomers, each purification monomer is provided with a second detection module, the water outlet pipeline is provided with a third detection module, and the first detection module, the second detection module and the third detection module are used for detecting the quality of wastewater; the chemical adding unit is used for providing chemicals for the purification monomers; the central control unit is electrically connected with the first detection module, the second detection module, the third detection module and the dosing unit respectively. According to the high-salinity wastewater softening and hardness removing device, efficient and convenient softening and hardness removing of high-salinity wastewater are realized through accurate dosing control.

The invention discloses a printing and dyeing wastewater zero-discharge treatment process based on low-pressure high-power membrane concentration and salt separation synergy. The wastewater is sequentially subjected to the steps of double-alkali softening pretreatment, organic pollutant treatment, forward osmosis low-pressure high-power concentration treatment, salt separation treatment and evaporative crystallization. Wherein the forward osmosis low-pressure high-power concentration treatment is performed in a partitioned manner along the flow direction, the osmotic pressure difference is gradually increased, the transmembrane pressure difference is gradually decreased, and interface electrochemical buffer and low-frequency gas-liquid disturbance can be set to inhibit concentration polarization and pollution. Carrying out nanofiltration and salt separation on the concentrated solution to obtain two paths of saline water mainly comprising Na2SO4 and NaCl, and respectively carrying out evaporative crystallization on the two paths of saline water; and refluxing and reusing the water produced by the draw solution. According to the process, high-power concentration and stable salt separation are realized under low mechanical pressure, the energy consumption is reduced, the water recovery rate and the crystal purity are improved, and zero discharge of wastewater is realized.

Methods, systems and devices for photo-electrolyitic PFAS destruction including a photoreactor vessel configured to receive an aqueous solution including PFAS, a UV light source configured to direct UV light onto the aqueous solution in the photoreactor vessel, a cathode within the photoreactor vessel configured to contact the aqueous solution, an anode in an electrolyte solution, an electrical power supply configured to provide a voltage difference between the anode and cathode, and a membrane or ionic bridge between the anode and cathode. The cathode may be a mesh and may have a high surface area construction with an electrochemically active surface area that is greater than the geometric surface area.

The utility model relates to a hardness removal device for wastewater dosing medium, including an equipment body, wherein a water outlet weir, a special-shaped inclined plate area, a crystallization and separation area, and a crystal nucleus mud storage area are sequentially arranged inside the equipment body from top to bottom, the water outlet weir is provided with a water outlet, the crystallization and separation area is provided with a reagent mixed crystal nucleus initial coagulation system, the reagent mixed crystal nucleus initial coagulation system is provided with a coagulant dosing and flushing port, a flocculant dosing port and a medium dosing port from top to bottom, the bottom of the reagent mixed crystal nucleus initial coagulation system is connected to a mixer, the mixer is provided with a total water inlet, the mixer is provided with a chemical agent dosing port, and the bottom of the crystal nucleus mud storage area is provided with a mud discharge port. The heterogeneous nucleation reaction of this device has the advantages of rapid nucleation, good precipitation effect, and small dosage of reagents.

The invention discloses a softening treatment method for high-calcium and high-sulfate radical sewage. By adding the seed crystal, calcium sulfate is crystallized to achieve the purpose of removing calcium ions, so that the generation of chemical sludge is avoided, and the cost of treating the chemical sludge is further reduced; according to the invention, the seed crystal is selected according to the saturation degree of the sewage, and the dosage of the seed crystal is determined, so that the selection of the optimal seed crystal type and dosage is achieved, the cost is saved, and the purpose of softening water is achieved.

A combined method for carbon sequestration and water treatment is described in the present invention. Said carbon sequestration comprises capturing atmospheric carbon dioxide in an aqueous solution, and said water treatment comprises simultaneous removal of said carbon dioxide from said aqueous solution by electrochemical deposition of metal carbonates, hydroxides and / or mixed salts crystallised on crystallisation seeds or beads. The metal carbonates, hydroxides and mixed salts are insoluble or sparingly soluble inorganic compounds obtained from the captured carbon dioxide by chemical reactions with water and metal cations contained in said pre-treated water. The crystallisation seeds are seeding crystals serving as nucleation centres for crystal growth of the metal carbonates, hydroxides and / or mixed salts from the alkaline stream. The crystallisation seeds and beads are optionally chemically modified with chemical functional groups to provide selective tuneable purity to the crystalline metal carbonates, hydroxides and / or mixed salts crystallised on said seeds or beads.

The invention provides an intelligent lime adding control method and system and a medium. The method comprises the following steps: acquiring real-time water flow data, calculating to obtain effective water flow parameter data, processing by combining the obtained historical average water flow parameter data and historical lime average dosage data to obtain predicted lime dosage data, acquiring lime performance parameter data and lime average reaction duration data, and processing to obtain lime effective utilization rate data; lime adding quantity demanded data are obtained by processing lime effective utilization rate data and lime predicted dosage data, then screw conveyor grade data are obtained through threshold value comparison, and finally the purified water state is obtained through threshold value comparison after purified water standard parameter data and purified water real-time parameter data are processed. Further adjusting the lime adding demand quantity data; therefore, intelligent adding of the lime is realized through calculation of the predicted lime dosage data, the lime effective utilization rate data and the lime adding demand quantity data and determination of the state of the purified water.

Methods, systems and devices for removing iodide from an aqueous solution including submerging an iodophilic electrode in an aqueous solution containing iodide, applying a current to the electrode, and electrochemically oxidizing the iodide to iodine within the electrode. The electrode may include an iodophilic material and an electrically conductive material. It may also include a binder. The iodophilic material may be a starch, chitosan, carboxycellulose, cationic polymer, or an anion exchange membrane material, for example. After oxidizing the iodide to iodine within the electrode, the electrode may be submerged in a second solution and a current may be applied to reduce the iodine and release it from the electrode in the form of iodide into the second solution.

The invention relates to the technical field of water treatment, and particularly discloses a crystal nucleus granulation induced hardness removal integrated water treatment process which comprises the following steps: firstly, ultrasonically dispersing nano-hydroxyapatite in deionized water, adding gamma-glycidoxypropyltrimethoxysilane for reaction, and treating to obtain a silanized hydroxyapatite crystal nucleus; the sodium polyacrylate reacts with aluminum sulfate and the like in an ethylene glycol solution to prepare the composite inducer. The preparation method comprises the following steps: reacting the two components in a phosphate buffer solution in proportion to obtain inducer-loaded crystal nucleus particles, carrying out multi-step reaction and treatment on the inducer-loaded crystal nucleus particles with calcium chloride and the like to obtain surface-coated crystal nucleus granulation bodies, and mixing the surface-coated crystal nucleus granulation bodies with cationic polyacrylamide and nano-zinc oxide to prepare the reinforced hardness removal agent. When to-be-treated water is treated, the reinforced hardness removal agent is added, stirring and precipitation are performed, supernate sequentially passes through the activated carbon filter column to adsorb impurities and is sterilized by the ultraviolet disinfection device, and finally effluent is collected, so that the hardness in the water can be efficiently removed, the process integration level is high, and the effect is good.

A water treatment system centrally communicates and controls one or more water treatment devices to regulate the use of the one or more water treatment devices. The water treatment system is configured to enable a localized, on-demand supply of purified water throughout a building or a network of buildings. The water treatment system may control a degree of purity (e.g., water hardness or concentration of dissolved salts) via mixing of purified and unpurified water streams in a controllable ratio (e.g., via one or more controllable valves or one or more tunable water softening units).

The invention relates to the technical field of water treatment, and mainly relates to a composite electrode unit, an electrochemical water treatment system and an electrochemical water treatment method. The composite electrode unit comprises an electrolyzed water cathode, a porous insulating filler layer and an electrolyzed water anode; the porous insulating filler layer is positioned between the electrolyzed water cathode and the electrolyzed water anode; the internal material of the porous insulating filler layer does not contain exchangeable ions, and the internal part refers to a non-surface part. According to the device, a cathode and an anode are respectively integrated on two sides of a porous insulating filler layer to form a unique composite electrode unit with a filler-electrode integrated structure. Under the driving of ultra-low direct-current working voltage, the transfer of water is controlled through filler micro-channels to realize the migration blocking of hydroxyl radicals, and meanwhile, the hydroxyl radicals are diffused into a water-phase main body of a cathode chamber by virtue of a local gradient diffusion effect generated by a catalytic reaction on the surface of an electrode and a forced diffusion effect of pumping; and scale-forming ions are quickly crystallized and separated out in a cathode region, and the hardness of water is reduced.

The invention relates to a treatment method and device for resource utilization of desulfurization wastewater in the technical field of desulfurization wastewater treatment, and the device comprises a pretreatment module, a magnesium removal module, a calcium removal module, a nanofiltration salt separation module, a concentration reduction module and a flue evaporation module, the method comprises the steps of pretreatment, magnesium removal treatment, calcium removal treatment, nanofiltration salt separation treatment, evaporative crystallization treatment and the like, heavy metals and suspended solids in the desulfurization wastewater are removed in the pretreatment module, a high-purity magnesium hydroxide product is extracted through the magnesium removal module, after calcium ions are removed in the calcium removal module, salt separation treatment is conducted through the nanofiltration salt separation module, and the high-purity magnesium hydroxide product is obtained. One part of the separated monovalent saline water is recycled, the other part of the separated monovalent saline water is concentrated and reduced by the concentration and reduction module and then enters the flue evaporation module to be evaporated, and the separated divalent saline water is recycled to a desulfurization system. The method has the advantages of simplicity and convenience in operation, economical operation, environment-friendly process and the like, high-purity magnesium hydroxide can be recycled, complete zero emission of the desulfurization high-chlorine wastewater is realized, and the method has a relatively high commercial application value.

The utility model discloses a solid-liquid separation treatment system for hardness and silicon removal of mine water. The solid-liquid separation treatment system comprises a water inlet tank, a first reaction tank, a second reaction tank, a concentration tank and a tubular membrane filtration device which are sequentially communicated along the treatment direction of the mine water, the first reaction tank is connected with a lime dosing device and a magnesium dosing device, the second reaction tank is connected with an alkali dosing device, aeration devices are arranged at the bottoms of the water inlet tank, the first reaction tank, the second reaction tank and the concentration tank, the aeration devices are connected with an external aeration fan, and mechanical stirrers are arranged in the first reaction tank, the second reaction tank and the concentration tank; a water outlet of the tubular membrane filtration device is connected with a water outlet tank through a water outlet pipe, a pipeline mixer is arranged on the water outlet pipe, and an acid dosing device is connected to the pipeline mixer; and a concentrated water port of the tubular membrane filtering device returns to the concentration tank through a return pipe. The device can simultaneously realize high-efficiency hardness removal, silicon removal and solid-liquid separation of mine water, and has the advantages of good effluent quality, stable operation, small occupied area and the like.

The invention belongs to the field of high-salinity organic wastewater treatment, and particularly relates to a shale gas high-salinity wastewater electrochemical catalysis coupling membrane separation low-carbon treatment method which comprises the steps of pretreatment, electrocatalytic oxidation, membrane separation, salt recycling and product recovery, intelligent management and control, energy coupling and the like. Through cooperation of an electrochemical catalysis coupling membrane separation technology and mass transfer strengthening, anti-pollution design and intelligent optimization of an intelligent energy system, the treatment efficiency and the recycling level of the shale gas high-salinity wastewater can be remarkably improved, and low-carbon, economical and efficient treatment of the shale gas high-salinity wastewater is achieved; and the method can also be used for treating similar high-salt organic wastewater generated by conventional oil and gas resource development, and has good popularization and application prospects.

The present invention provides a treatment system for resin regeneration wastewater in a thermal power plant, which relates to the technical field of wastewater treatment. The system comprises a wastewater collection module, a sedimentation treatment module, a flotation treatment module, a filtration module, a reverse osmosis treatment module, a concentration module and an electrolysis treatment module, which are connected in sequence to form a complete treatment process for resin regeneration wastewater in a thermal power plant. Through the joint action of each module, effective treatment of resin regeneration wastewater in the thermal power plant is achieved; at the same time, effective treatment of resin regeneration wastewater is achieved, and the treated product can be reused for resin regeneration, thereby reducing pollution to the environment and achieving recycling of resources. Therefore, the above invention achieves standard discharge or resource utilization of wastewater through an efficient and environmentally friendly wastewater treatment system, which is of great significance for promoting the green development of thermal power plants.

The invention relates to the technical field of fracturing flow-back fluid treatment, and discloses a fracturing flow-back fluid discharge treatment process and device.The fracturing flow-back fluid discharge treatment process comprises a pretreatment unit, a membrane concentration reduction unit and a deep treatment unit, and the pretreatment unit comprises an oxidation gel breaking reaction zone, an air flotation treatment zone and a magnetic coagulation reaction system; comprising the following steps: S1, the fracturing flow-back fluid firstly enters a regulating tank and then enters an oxidation gel breaking reaction zone; s2, entering the air flotation treatment area; s3, the wastewater firstly enters the hardness removal reaction tank and enters the coagulating sedimentation area for reaction, and the precipitated sludge enters the magnetic powder recovery subunit; s4, water discharged from the pretreatment system enters a membrane concentration decrement unit; s5, the membrane concentrated solution enters a BDD electrooxidation system, organic matter in water is oxidized through a BDD electrode, BDD effluent enters an MVR evaporation system to be evaporated, and MVR evaporation mother liquor enters a mother liquor drying system. According to the invention, the treatment efficiency of the fracturing flow-back fluid can be improved on the whole.

The utility model provides an organophosphorus-containing wastewater treatment system. The organophosphorus-containing wastewater treatment system comprises an adjusting tank, an oxidation unit, a physicochemical treatment unit and a biological reaction unit which are connected in sequence, wherein the adjusting tank is provided with an acid-base medicament feeding port; the oxidation unit is provided with an oxidant feeding port; the physicochemical treatment unit comprises a coagulation zone, a flocculation zone and a sedimentation zone which are connected in sequence; the coagulation area is provided with a coagulant feeding port, the flocculation area is provided with a flocculant feeding port, the bottom surface of the coagulation area is communicated with the bottom surface of the flocculation area through a pipeline, and the bottom surface of the coagulation area is higher than the bottom surface of the flocculation area; a biochar layer is arranged in the biological reaction unit and is suitable for degrading organic phosphorus-containing wastewater. The organophosphorus-containing wastewater treatment system disclosed by the utility model can realize efficient treatment of the organophosphorus-containing wastewater.

Methods, systems and devices for PFAS destruction including removing nitrate from water containing PFAS, combining the water with a sensitizer and a sufficient quantity of base to create a treatment solution having a pH of about 10 or more, and irradiating the treatment solution with UV light in a photoreactor to destroy a portion of the PFAS. The nitrate may be removed electrolytically such as by electrolytically reducing nitrate to nitrogen gas and / or ammonia. The nitrate may be removed by filtration through a selective membrane, such as by reverse osmosis, forward osmosis, nanofiltration, and / or ultrafiltration. The system may include electrolytic cell system including a first cell with a cathode contacting the water containing PFAS in the first cell, a second cell including an anode in an electrolytic solution, a power source, and a salt brine and / or membrane separating the first and second cells.