26results about How to "Less sludge" patented technology

The invention discloses a low-cost treatment method for high-manganese-content difficult-to-treat mine acid wastewater, which is implemented by adopting a graded neutralization treatment process and comprises the following steps: regulating the pH value of the wastewater to be 5-6 in a first-stage neutralization reaction, feeding the wastewater into a first-stage flocculation reaction tank, and agglomerating hydroxide particles to form large flocculate; feeding the wastewater subjected to the primary flocculation reaction into a primary sedimentation tank to precipitate sludge in the wastewater, feeding discharged supernate into a secondary neutralization tank, feeding the discharged supernate into a secondary flocculation reaction tank, feeding the wastewater subjected to the secondary flocculation reaction into a secondary sedimentation tank to precipitate sludge in the wastewater, and taking supernate of the secondary sedimentation tank as qualified effluent; the method disclosed by the invention is simple in process, high in heavy metal removal rate, relatively small in agent use amount and small in sludge generation amount, can overcome the defects that manganese in the effluent of the mine acid wastewater is difficult to reach the standard, the effluent needs acid callback, the agent use amount is large and the sludge generation amount is large, and can efficiently ensure that the effluent of a mine acid wastewater treatment facility stably reaches the standard in an energy-saving manner.

The invention provides a thallium removal method for a thallium-containing solution in a process of extracting lithium from lepidolite, and the method comprises the following steps: pumping the thallium-containing solution into a first-stage reaction kettle, adding a first mixing agent, stirring for reaction, and filtering to obtain a first-stage thallium-removed solution and first-stage thallium-removed slag; and pumping the first-stage thallium removal liquid into a second-stage reaction kettle, adding a second mixing agent, stirring for reaction, standing, and filtering to obtain second-stage thallium removal liquid and second-stage thallium removal slag. According to the thallium removal method for the thallium-containing solution in the lithium extraction process of lepidolite, thallium removal is carried out on the thallium-containing solution in two steps, the first step is carried out through the first mixing agent, the second step is carried out through the second mixing agent, no organic flocculant is used, rapid sedimentation can be achieved, no harmful gas is generated, the sludge amount is small, the process is short, and lithium loss is low; and efficient thallium removal in the process of extracting lithium from lepidolite is realized.

The invention relates to the technical field of sewage treatment, and discloses a ship domestic sewage treatment process and device. The process comprises the following steps: removing large garbage from the ship domestic sewage through a rotary garbage separator, and crushing the ship domestic sewage through a crushing pump to obtain to-be-treated sewage; the sewage to be treated is subjected to A / O biochemical treatment, and biochemical effluent is obtained; carrying out external MBR (Membrane Bioreactor) on the biochemical effluent to obtain a concentrated mixed solution and produced water; the concentrated mixed solution is subjected to reflux A / O biochemical treatment, produced water is subjected to ultraviolet sterilization treatment, and discharged water is obtained. According to the present invention, the ship domestic sewage is treated by using the MBBR reinforced A / O biochemical and external MBR combined technology, the process has good treatment effects of high solid-liquid separation efficiency, small sludge amount, strong nitrogen and phosphorus removal ability and the like, the quality of the produced water is significantly higher than the quality of the produced water produced by using the conventional treatment method, the activated sludge concentration is improved, the equipment volume is reduced, the sewage blocking of the external MBR membrane element is reduced, and the sewage treatment efficiency is improved. And the maintainability of the equipment is improved, and the service life is prolonged.

The present invention relates to a sewage pretreatment tank and sewage treatment process, comprising a tank body and a grille slot arranged on the top of the tank body, the inner cavity of the tank body is divided by two partitions into a regulating area, a sand settling area and a mud storage area arranged in sequence in the horizontal direction, the grille slot is connected with a water inlet pipe and a sewage pipe, the lower end of the sewage pipe extends into the bottom of the sand settling area, and the two partitions are respectively provided with a plurality of water holes; it also includes a drainage mechanism connected with the regulating area and a mud inlet pipe connected with the mud storage area, the outlet end of the drainage mechanism is connected with a water outlet pipe, and the lower end of the mud inlet pipe extends into the bottom of the mud storage area; an aeration mechanism and a reflux mechanism are arranged in the mud storage area, and the output end of the reflux mechanism is connected with the regulating area and the sand settling area. The pretreatment tank of the present invention has a compact structure, low investment cost and good treatment effect, and can also play a role in hydrolysis and acidification, reduce subsequent biochemical load, and the internal mud storage area digests part of the sludge through micro-aeration, greatly reducing the amount of residual sludge, and preventing the release of phosphorus.

The utility model relates to the field of sewage treatment, in particular to an adjusting tank with a sludge circulation function, which comprises an adjusting tank, a fixing frame is arranged in the middle of the upper surface of an adjusting tank body, a limiting unit is arranged on the upper surface of the middle of the fixing frame, and a sludge stirring unit is arranged at the bottom of the limiting unit. A sludge circulating pipe is arranged on the lower surface of the fixed frame, a conventional sludge backflow pipe is changed from an anaerobic tank to a regulating tank and is changed into the sludge circulating pipe, and circulating sludge fed by the sludge circulating pipe can be effectively and fully mixed with sewage in the regulating tank in cooperation with a sludge stirring unit in the regulating tank; a granulation reaction is carried out under the fluidization effect of sludge and sewage, the sludge flocculation effect is improved, the co-digestion effect of the sludge is promoted, release of organic matter is improved, carbon source supplementation is carried out on the sewage, the sludge at the bottom is discharged into a sludge concentration tank, and therefore the residual sludge amount in the discharged sewage is reduced, the sludge amount is reduced, and the tail end treatment burden is reduced.

The invention relates to the field of sewage treatment equipment, in particular to an MBR (Membrane Bioreactor) membrane module, which comprises a membrane frame and a plurality of membrane elements fixedly mounted on the membrane frame, an air supply assembly and a plurality of aeration boxes with downward openings are fixedly mounted on the bottom side of the membrane frame, the air supply assembly is used for blowing air into each aeration box, aeration heads are arranged on the top sides of the aeration boxes, and the aeration heads are used for blowing air into the aeration boxes. The aeration head is fixedly connected with an exhaust pipe, the exhaust pipe fixedly penetrates through the top side of the aeration box, a shielding cover with an upward opening is fixedly mounted in the aeration box, the shielding cover sleeves the part, located in the aeration box, of the exhaust pipe, a mounting plate is embedded in the bottom side of the shielding cover, a plurality of sludge discharge ports are formed in the mounting plate, and a shaft rod is rotationally mounted on the bottom side of the mounting plate; a plurality of shielding plates are fixedly mounted on the shaft rod, the shaft rod rotates to drive the shielding plates to shield the sludge discharging opening, and a driving mechanism is mounted on the shaft rod and used for driving the shaft rod to rotate. The membrane element has the effect of improving the flushing effect of air on the membrane element.

The invention belongs to the field of industrial wastewater treatment, and discloses a phosphogypsum leachate resourceful treatment system and method. The system comprises an alkali adjustment reaction unit, a nanofiltration unit, a fluorine recovery unit, a reverse osmosis unit and a phosphorus recovery unit. The method solves the technical problem that the purity and the yield of a phosphorus resource recovery product in the phosphogypsum leachate are low due to the influence of fluorine ion interference.

This invention relates to the field of water treatment technology and provides a high-speed micro-sand sedimentation process device with sludge thickening function. It includes a coagulation tank, a sand injection tank, a flocculation tank, and a sedimentation tank. It also includes a reflux system: an internal reflux system comprising an internal reflux pipe with its opening at the bottom of the sedimentation tank, and a micro-sand reflux pump and a hydrocyclone connected to the internal reflux pipe; and an external reflux system comprising an external reflux pipe with a distribution trough and a micro-sand reflux pump connected to it, the micro-sand reflux pump being located on one side of the sedimentation tank. This invention fully utilizes the ballast effect of the micro-sand, causing the formed suspended solid flocs to settle rapidly. Through the external reflux system, some of the discharged sludge is reintroduced into the internal reflux system to achieve sludge thickening, greatly reducing the amount of sludge discharged from the entire system and significantly increasing the sludge concentration. This results in high sludge concentration, good effluent quality, small footprint, and low power consumption.

The invention relates to the technical field of sewage treatment, and particularly discloses electro-Fenton equipment and a method for pretreating high-concentration degradation-resistant organic wastewater, which are used for solving the problem of poor treatment mode in the prior art. Comprising an electro-Fenton treatment box, a zoning partition plate is arranged in the center of an inner cavity of the electro-Fenton treatment box, a water inlet partition plate and a water outlet partition plate are arranged in the electro-Fenton treatment box on the two sides of the zoning partition plate respectively, and a first reaction zone is constructed between the water inlet partition plate and the zoning partition plate; according to the invention, the condition that the traditional Fenton reaction must be carried out under the condition that the pH value is 3-4 is overcome, and the addition of agents such as acid and alkali is saved. In the reaction process, ferrite is not added, only hydrogen peroxide is added, the sludge amount is reduced, the sewage treatment effect is enhanced, the sewage treatment speed is increased, the stability of the treatment effect is improved, and the adaptability to the water quality change condition is high.

The invention discloses a preparation method and application of an organic silicon modified aluminum-zirconium / titanium bimetallic composite fluorine removal agent (CSAZ / CSAT), and belongs to the technical field of water treatment. Zirconium tetrachloride or diluted titanium tetrachloride is compounded with aluminum chloride to construct a bimetallic framework. Meanwhile, vinyltriethoxysilane (VTES) is introduced as an organic modifier, and heterogeneous copolymerization is carried out on an organic silicon hydrolysate and metal hydroxyl by controlling the dripping rate and the reaction temperature. According to the fluorine removal agent, by utilizing the bridging effect of organic silicon and the synergistic effect of double metals, the adsorption, complexation and net capture capacities on fluorine ions are remarkably enhanced. Experiments show that when the molar ratio of Al to Zr is 9: 1 (CSAZ) or the molar ratio of Al to Ti is 14: 1 (CSAT), the defluorination effect is optimal. When the agent is applied, the pH value does not need to be adjusted, a coagulant aid does not need to be added, efficient removal of fluorine ions can be achieved only through a single agent, the agent has the advantages of being low in dosage, neutral in effluent pH value and the like, and the industrial problems that a traditional fluorine removal process is long in process, large in acid and alkali consumption and difficult in sludge treatment are effectively solved.

This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment system for industrial parks used to reduce pollutant emissions. The system includes an industrial wastewater treatment device and a domestic wastewater treatment device. The industrial wastewater treatment device includes, in sequence, an underground buffer tank, a demulsification reaction tank, a paper tape oil separator, a wastewater collection tank, a physicochemical flat-plate biological bed, a first dissolved air flotation tank, and a first sludge tank. The domestic wastewater treatment device includes, in sequence, a bar screen, an equalization tank, a domestic flat-plate biological bed, a second dissolved air flotation tank, and a second sludge tank. The first and second dissolved air flotation tanks are connected via pipelines and output as treated wastewater that meets emission standards. This system separates industrial and domestic wastewater treatment, specifically by converting the original MBR membrane tank into a flat-plate biological bed and the primary treatment tank into a flat-plate biological bed. Carbon removal / nitrification reactions are achieved through the biofilm carrier (packing material), improving the efficiency of organic matter degradation and reducing the COD, ammonia nitrogen, and sludge volume in the effluent.

The invention provides an advanced oxidation method for treating a garbage membrane concentrated solution, which comprises the following steps: (1) adding quick lime into a garbage leachate concentrated solution, and then adding sodium carbonate for softening to obtain a softened solution; (2) adding a flocculating agent into the softened liquid, carrying out flocculent precipitation to obtain a flocculated liquid, and filtering the flocculated liquid to obtain a flocculated clear liquid; (3) adding hydrogen peroxide into the flocculated clear liquid, enabling the flocculated clear liquid to flow through three-dimensional electro-catalysis equipment from bottom to top, carrying out advanced oxidation to obtain oxidized liquid, and discharging effluent; the three-dimensional electro-catalysis equipment is a three-dimensional electrode reaction system formed by coupling a polar plate material with a catalyst, and the catalyst is a catalyst in which an active component is loaded by an alumina carrier. According to the treatment method disclosed by the invention, the leachate concentrated solution of the refuse landfill can be well treated, so that the removal rate of COD (Chemical Oxygen Demand) in the landfill leachate concentrated solution reaches 94% or above, the removal rate of total nitrogen reaches 93% or above, the hardness removal rate reaches 88% or above, and the removal rate of heavy metal ions reaches 94% or above.

The present invention relates to the technical field of multi-stage sewage treatment, and discloses a sewage treatment device and a sewage treatment system for esterification reaction, including a main body, wherein a regulating tank, a flocculation tank and a sedimentation tank are arranged inside the main body, and a partition is fixedly connected inside the regulating tank, and the partition divides the regulating tank into a plurality of chambers. The present invention is conducive to realizing a decentralized step-by-step neutralization operation by dividing the regulating tank into a plurality of chambers in series, and providing a barrel and an agitator matching the chambers. Compared with the method of centralized agent neutralization, the probability of the occurrence of agent agglomerates is smaller, and by providing a screen drum, an inclined blade, a drive assembly and a transmission assembly, it is possible to collect agglomerates that are difficult to disperse, and then grind them above the sewage liquid surface and then re-put them into the sewage for dispersion, further solving the problem that a small amount of agglomerates are difficult to disperse, thereby improving the neutralization effect, reducing the amount of sludge in the sewage, and reducing the sludge treatment pressure of the subsequent sedimentation tank.

The invention discloses a water treatment device and method based on a micro-aerobic electrolysis ion exchange biofilter. The water treatment device comprises a pretreatment mechanism, a micro-aerobic electrolysis biofilter and a biological aerated filter, wherein the micro-aerobic electrolysis biofilter and the biological aerated filter are connected with the pretreatment mechanism; the pretreatment mechanism comprises a regulating tank and a dephosphorization tank which are communicated with each other; the micro-aerobic electrolytic biological filter comprises a micro-aerobic electrolytic tank outer shell and a micro-aerobic electrolytic tank inner shell; wastewater is subjected to a short-cut nitrification and denitrification process under the micro-aerobic condition of the micro-aerobic electrolysis cathode chamber, a part of accumulated nitrite nitrogen enters the micro-aerobic electrolysis anode chamber through the anion exchange membrane to be reduced into nitrogen, a part of the accumulated nitrite nitrogen is subjected to the short-cut denitrification process to become nitrogen, and meanwhile, the backflow wastewater is rich in nitrate nitrogen; high-concentration nitrate nitrogen and nitrite nitrogen enter the micro-aerobic electrolysis anode chamber through an anion exchange membrane in the micro-aerobic electrolysis cathode chamber and are reduced into nitrogen in the micro-aerobic electrolysis anode chamber, and the process strengthens the denitrification process under the synergistic effect of microbiology and electrochemistry.

The present invention discloses a contact oxidation sewage treatment equipment and a sewage treatment method, which relates to the technical field of sewage treatment equipment, including a contact oxidation tank and an intelligent filter tank. A sludge area is formed at the bottom of the contact oxidation tank, and a plurality of perforated sludge discharge pipes are arranged in the sludge area, and a plurality of sludge discharge pipes are arranged on the top side of the perforated sludge discharge pipes; the intelligent filter tank includes an intelligent filter tank body, a sewage discharge area, a sedimentation area, a filtration area, a clean water area, an inlet area and an outlet area, and a filtration device is arranged in the filtration area. A backwashing device is arranged above the intelligent filter tank body, and an energy wave generating device is arranged below the backwashing device. The contact oxidation tank of the contact oxidation sewage treatment equipment of the present invention has good effluent water quality, and the contact oxidation tank can timely remove aged sludge and its metabolites, so that the effluent water quality is better; the intelligent filter tank has good sludge interception and mud-water separation effects, and the intelligent filter tank adopts an upward flow structure, organically integrating the sedimentation unit and the filtration unit in water treatment, and has a good sludge interception effect.

This invention pertains to the field of pickling wastewater treatment in the steel industry. It discloses a method and system for the resource-based treatment of industrial wastewater containing fluoride and heavy metal ions. The method involves using sodium hydroxide to convert heavy metal and fluoride ions in the wastewater into hydroxides and fluoride complexes, which are then co-precipitated and separated from the aqueous phase. Sodium hydroxide is then used to convert the co-precipitated heavy metal and fluoride complexes into water-insoluble heavy metal hydroxides and water-soluble sodium fluoride. Calcium hydroxide is used to convert sodium fluoride in the water into calcium fluoride precipitate and water-soluble sodium hydroxide. The resulting NaOH aqueous solution is reused as part of the sodium hydroxide solution used in the preceding steps. Calcium hydroxide is then used to completely precipitate any remaining trace amounts of heavy metal and fluoride ions in the wastewater. The resulting wastewater then enters a biological treatment system for denitrification. This invention significantly reduces the amount of sodium hydroxide used and the amount of solid hazardous waste generated, alleviating the burden on biological treatment and lowering the overall cost of wastewater treatment.

The present application relates to wastewater treatment technical field, disclose a kind of processing method of inorganic fluorine-containing wastewater, comprising the following steps: the pH of inorganic fluorine-containing wastewater is adjusted to 2~4, calcium carbonate is loaded into carbide slag, and reaction is carried out;Coagulant is added to the wastewater after step S1 processing, coagulation and precipitation are carried out, and the precipitate is separated out.In the present application, the fluorine ion in wastewater is converted into calcium fluoride by using calcium carbonate loaded carbide slag, which can reduce the adhesion and wrapping of calcium fluoride on the surface of carbide slag, thereby achieving better wastewater defluorination effect under smaller carbide slag dosage, which is beneficial to reduce sludge amount.

The invention discloses a wastewater treatment system and method for coupling a three-dimensional electrode system with an anion exchange membrane. The wastewater treatment system comprises a pretreatment mechanism, a three-dimensional electrolytic ion exchange mechanism communicated with the pretreatment mechanism, and an MBBR electrolysis mechanism communicated with the three-dimensional electrolytic ion exchange mechanism, the pretreatment mechanism comprises a grating type filter tank, and the grating type filter tank is communicated with a pretreatment regulating tank; the three-dimensional electrolysis ion exchange mechanism and the MBBR electrolysis mechanism are coupled, under the action of a three-dimensional electrode system, the contact specific surface area of microorganisms and electrodes is increased, biological metabolism of electro-activated denitrifying bacteria is promoted through micro-current, and the denitrification effect is promoted through nitrate nitrogen in backflow wastewater; meanwhile, the backflow wastewater is rich in nitrate nitrogen, the nitrate nitrogen enters the anode biological chamber through the anion exchange membrane in the cathode biological chamber and is reduced into nitrogen in the anode biological chamber, and the denitrification process is enhanced under the synergistic effect of microbiology and electrochemistry.

A biofilm reaction device for industrial wastewater treatment comprises at least one biofilm reactor, each biofilm reactor comprises a main body framework, and each main body framework comprises an inner cylinder and an outer cylinder which are coaxially arranged; the inner cylinder and the outer cylinder are both hollow cylinders, a plurality of first holes are evenly formed in the surface of the inner cylinder, and a plurality of second holes are evenly formed in the surface of the outer cylinder. The upper plate is assembled at the upper end of the main body framework; the lower plate is assembled at the lower end of the main body framework; a microbial carrier area is formed among the inner cylinder, the outer cylinder, the upper plate and the lower plate; and a slow-release glucose feeding area is formed among the inner cylinder, the upper plate and the lower plate. The biological membrane reaction device for industrial wastewater treatment, disclosed by the utility model, is reasonable in structural design, and realizes synchronous reaction of anoxic, aerobic and anaerobic conditions and efficient treatment of industrial wastewater through modular, multi-level and porous design and optimization of microbial distribution and environmental conditions of a biological membrane.

The invention discloses a zero-discharge system for resource utilization of desulfurized wastewater, which mainly includes a desulfurization treatment device, a high-pressure centrifugal cyclone, a raw water regulating tank, an electric flocculation device, a high-efficiency clarification softener, a membrane filter, a high-pressure ozone device, a high-pressure ultraviolet device, a single-head encapsulated hollow ultrafiltration, a security filter, an NF device, a magnesium sulfate concentration device, a magnesium sulfate crystallizer, a freezing separator, a purification device, a sodium bed, a primary RO device, a HIRO device, an electrolysis device, a sodium chloride crystallizer, a flue evaporation crystallization device, a secondary RO device, a high-efficiency adsorbent dosing device, a sodium hydroxide dosing device, a calcium hydroxide dosing device, a sodium sulfate dosing device, a coagulant dosing device, a pH meter, a Ca online monitor, a Mg online monitor, an online COD meter, and a sludge dehydration device. This system can reduce the amount of dosing, and at the same time reduce the amount of sludge produced in the water, generate industrial-grade magnesium sulfate and sodium chloride byproducts, and solve the problems currently encountered in thermal power plants.

The invention discloses a photovoltaic cell production wastewater perfluorine recovery process and a treatment system, concentrated alkaline water and dilute alkaline water are mixed, suspended solids, organic matters and particulate impurities are removed through a pretreatment system, fine particles are removed through an ultrafiltration membrane system, and then the mixture enters a nanofiltration membrane system to intercept silicon and other ions with more than two valence, so that the perfluorine recovery process is realized. Water produced by the nanofiltration membrane system enters a neutralization adjusting tank to be neutralized with part of dilute acid water until the pH is 5-8, fine particles in the solution are removed through a first precision filter, fluoride is intercepted through a two-stage RO membrane, and a concentrated sodium fluoride solution is obtained; sodium fluoride solution concentrated acid water and residual dilute acid water are mixed and then subjected to a crystallization reaction with a lime solution and a calcium chloride solution in a fluorine recovery and crystallization reactor to obtain a calcium fluoride crystal product, and effluent of the fluorine recovery and crystallization reactor enters a fluorine removal system and then is discharged after reaching the standard. 99% of fluorine elements are recycled as high-purity calcium fluoride, the sludge amount is small, and the medicament cost is very low.

This invention provides a low-energy-consumption fracturing flowback fluid staged treatment system and method. The system includes a flowback fluid reuse system, a softening pretreatment system, a membrane concentration system, and a solar evaporation crystallization system connected in sequence. The membrane concentration system includes a primary reverse osmosis unit, a secondary reverse osmosis unit, an electrodialysis unit, and an ammonia nitrogen and boron adsorption unit. The solar evaporation crystallization system includes a preheating circulation tank, a solar heater, a flash tank, an evaporator, a heat exchanger, and a thickener. The solar heater is used to circulate and preheat the electrodialysis concentrate in the preheating circulation tank. The liquid outlet of the preheating circulation tank is connected to the inlet of the flash tank. The liquid phase outlet of the flash tank is connected to the inlet of the evaporator via a heat exchanger. The liquid phase outlet of the evaporator is connected to the thickener. The gas phase outlets of the flash tank and the evaporator are respectively connected to the liquid inlet of the ammonia nitrogen and boron adsorption unit via pipelines and heat exchangers. This invention can remove contaminants from fracturing flowback fluid in stages with low energy consumption.

The utility model discloses a sewage separation water filter and relates to the technical field of water filters. The sewage treatment device comprises a box body, a filter tank is arranged on one side in the box body, a sedimentation tank is arranged on the other side in the box body and used for precipitating heavy solids in sewage, and an anaerobic digestion tank is arranged on the outer wall of the other side of the box body and used for decomposing organic matters, reducing the amount of sludge and generating biogas. According to the sewage treatment device, through the arrangement of the auger and the transmission gears, automatic discharge of sediments is achieved, the requirement for manual cleaning is reduced, the cleaning efficiency is improved, through the arrangement of the coarse filter screen and the fine filter screen, large particles in sewage are effectively removed, the filtering efficiency is improved, and through the design of the sliding groove and the spring, the filtering effect is improved. According to the utility model, the mounting rack of the filter assembly can be flexibly bounced and pressed down, the practicability is improved, the design of the anaerobic digester is beneficial to the decomposition of organic matters, the reduction of sludge amount and the possibility of generating biogas, and the cyclic utilization of resources is improved.

The present invention provides a method for denitrification treatment of sulfide anaerobic ammonium oxidation granular sludge with a core-shell structure. It includes a bioreactor inoculated with sulfide anaerobic ammonium oxidation granular sludge with a core-shell structure, in which wastewater continuously flows into the bioreactor inoculated with sulfide anaerobic ammonium oxidation granular sludge with a core-shell structure. The reactor couples sulfur autotrophic denitrification with anaerobic ammonium oxidation without adding an external carbon source, and ammonia nitrogen and nitrate in the water are continuously, efficiently and stably reduced to nitrogen gas. The bioreactor in the present invention is an upflow anaerobic bioreactor, and the temperature is maintained at 35°C. The present invention proposes a denitrification treatment technology for sulfide anaerobic ammonium oxidation granular sludge with a core-shell structure. The sulfide anaerobic ammonium oxidation sludge takes anaerobic ammonium oxidation granular sludge as the core, and under the catalysis of zero-valent iron, the S produced by the disproportionation reaction of sodium thiosulfate 32 For shells, nitrate is obtained through S 32 It is short-range reduced to nitrite and can be utilized by the core anaerobic ammonium oxidation granular sludge in the nano range to achieve the simultaneous degradation of ammonia nitrogen and nitrate.

The present invention provides an intensive modular combined aquaculture tailwater treatment system, comprising a sewage collection tank, a physical filtration device, an electrode-suspended filler coupled biofilter treatment unit, and an air pump microporous aeration tank connected in sequence, wherein the sewage collection tank, the physical filtration device, the electrode-suspended filler coupled biofilter treatment unit, and the air pump microporous aeration tank are all connected to a sludge concentration and dehydration device; the suspended filler in the electrode-suspended filler coupled biofilter treatment unit is arranged in the biofilter, the DC positive and negative electrode array combination is arranged at the upper part of the biofilter, the electric stirring device is arranged at the lower part of the biofilter, the bottom of the biofilter is provided with a sludge hopper, the electric stirring device is arranged above the sludge hopper, and the carbon source supplement device is connected to the biofilter through a pipeline. The present invention has the advantages of high denitrification and phosphorus removal efficiency, small footprint, energy saving, low cost, no secondary pollution, and simple management.

The invention discloses a process and a system for deeply treating high-concentration fluorine-containing wastewater. The process comprises a first-stage defluorination reaction process section, a second-stage defluorination reaction process section and a third-stage defluorination reaction process section which are arranged in sequence, the first-stage defluorination reaction process section adopts a chemical precipitation method to perform first-stage defluorination, the second-stage defluorination reaction process section adopts a coagulation precipitation method to perform second-stage defluorination, and the third-stage defluorination reaction process section adopts an electric flocculation method to perform third-stage defluorination. According to the method, the chemical precipitation method is used for primary fluorine removal, so that the high-fluorine-content wastewater is changed into the low-concentration fluorine-containing wastewater, then the coagulating precipitation method is used for further removing fluorine ions, and finally the electric flocculation method is used for deep fluorine removal, so that the problem that the fluorine ion concentration of the effluent is difficult to reach 1.5 mg / L or below after the high-fluorine-content wastewater is treated in the prior art can be solved. The amount of sludge generated by the electric flocculation method is relatively small, no coagulant aid needs to be additionally added, and the content of Al ions in effluent can be obviously reduced.