112 results about "Biological reactor" patented technology

The invention provides a bioreactor aeration self-adaptive control method and system based on machine learning, and the method comprises the steps: collecting the water inlet flow, ammonia nitrogen concentration, dissolved oxygen concentration, water temperature and chemical oxygen demand data of a bioreactor in real time through a sensor, and carrying out the water balance verification and the Kalman filtering pretreatment containing a water temperature compensation item; generating an aeration instruction by adopting multi-model collaboration; outputting a reference aeration rate by a deep reinforcement learning DRL model; the self-adaptive PID controller dynamically adjusts the proportionality coefficient according to the dissolved oxygen deviation and calculates the correction amount; and the LSTM network generates a fusion weight, and combines the seasonal compensation factor and the safety coefficient to synthesize the final aeration rate. The system passes mutation rate constraint and nitrification efficiency verification, an ASM1 model is triggered to recheck when the deviation exceeds the standard, and after passing, an air blower with the precision of + / -2% executes an instruction and performs closed-loop feedback in a period smaller than or equal to 10 seconds. After the method is implemented, the aeration energy consumption is reduced to 0.38 kWh / m, the effluent ammonia nitrogen standard reaching rate is improved to 98.5%, the dissolved oxygen fluctuation range is reduced to + / -0.3 mg / L, and the impact load response time is shortened to be within 15 minutes.

The invention discloses a grain specific promoter in the early stage of rice filling and application thereof, the promoter is named as proASP1, and the nucleotide sequence of the promoter is shown as SEQ ID NO: 1. The promoter has highly strict spatio-temporal expression specificity, the activation expression of the promoter is only limited in grains in the early stage of rice filling (4-12 days after flowering), especially the expression of genes is efficiently driven in endosperm and aleurone layers, and the expression is not leaked in other tissues such as roots, stems, leaves, leaf sheaths and glumes and grains in the middle and later stages of filling. The invention provides a basic and precious molecular tool for gene function research, quality improvement (such as protein and starch synthesis regulation) and bioreactor development in a key window period of rice grain development, and has important scientific research and application values.

The invention discloses a sewage biological reaction tank treatment method based on plant root filler, and relates to the technical field of environmental engineering and water treatment.The sewage biological reaction tank treatment method comprises the following steps that a unified event time base line is constructed, an inflow fluctuation frequency spectrum is extracted, nutritive salt layering fingerprints are generated, and a layering risk field in a reaction tank is quantified; under the constraint of layered fingerprints of nutritive salt, the three-dimensional gradient of dissolved oxygen distribution is reconstructed, an oxygen debt threshold value is calculated, and micro-area space coordinates of the suffocation area are positioned. By constructing a uniform event time baseline, time sequence identification and response control of inflow disturbance are realized, a precise positioning suffocation area is reconstructed in combination with nutritive salt layered fingerprints and oxygen distribution, a root zone physiological signal is introduced to identify a fragile layer, and aeration and inflow are cooperatively regulated and controlled, so that synchronous destructive intervention is realized; finally, a layered structure is controlled and cut off through the time reversal flow state, a dynamic closed-loop regulation and control mechanism is constructed, and the stability of the reaction tank under the fluctuating working condition and the consistency of the effluent quality are effectively improved.

The invention relates to the technical field of pig farm wastewater treatment, in particular to a bioreactor for treating wastewater based on algae-bacteria symbiosis and a wastewater treatment method.The bioreactor comprises activated sludge and algae, and stable bacteria-algae floc is formed in the bioreactor through self-attachment of the algae to a double-layer concentric carrier; removing nutrient substances in the wastewater; the wastewater is pig farm wastewater. The bioreactor provided by the invention promotes algae self-adhesion and floc formation through the algae self-adhesion double-layer concentric carrier, systematically guides bacterial-algae symbiosis, realizes synergistic metabolism, significantly improves COD, TN and TP removal efficiency, and realizes efficient removal of nutrients in pig farm wastewater treatment under extreme conditions of high ammonia nitrogen, high TP and the like.

The invention relates to the technical field of biological sewage treatment, and particularly discloses a process for combined treatment of antibiotic wastewater by a compound microorganism-MBR (Membrane Bioreactor) membrane. The invention provides a process for combined treatment of antibiotic wastewater by a compound microorganism-MBR (Membrane Biological Reactor) membrane, which comprises the following steps of: performing directional domestication and toxicity screening on activated sludge through COD (Chemical Oxygen Demand) gradient increase and decrease and removal rate control, and constructing a microbial community resistant to sulfamethoxazole impact; further, a compound bacteria solution composed of marine Arfiv bacteria and Rhodopseudomonas faecalis is introduced, so that synergistic degradation of high COD and sulfamethoxazole is realized under a proper pH condition, and the COD removal rate is still kept at a relatively high level when the concentration is increased; and the tail end is matched with MBR membrane separation, and efficient biodegradation and efficient solid-liquid separation are coupled, so that the sulfamethoxazole and COD in the wastewater are efficiently removed under the conditions of low drug consumption and near neutrality.

The invention discloses an SRB remediation system capable of stably operating for treating heavy metal wastewater for a long time and application, belongs to the technical field of heavy metal wastewater treatment, and solves the problems that in the prior art, mining heavy metal wastewater generally contains high-concentration soluble heavy metal, high sulfate content and low pH value, the ecological environment is seriously damaged, and the service life of the mining heavy metal wastewater is prolonged. And the traditional physicochemical treatment method has the technical problems of high agent consumption, high sludge amount, easiness in secondary pollution and the like. According to the SRB remediation system capable of stably operating for a long time and used for treating heavy metal wastewater, efficient removal and immobilization of heavy metal are achieved on the basis of the biological vulcanization effect of SRB composite flora in a UASB bioreactor in combination with the synergistic effect of microbial communities and the protection mechanism of extracellular polymeric substances, and by constructing the composite SRB flora system, operation parameters are accurately regulated and controlled, so that the heavy metal wastewater treatment efficiency is improved. And efficient and stable removal and fixation of various heavy metals in the AMD are realized in the UASB reactor by utilizing a cooperative protection mechanism of EPS.

The present application belongs to the technical field of wastewater treatment, and discloses a method for treating electroplating wastewater by using bioreduction of biogas slurry and combined iron bio-oxidation, which is a secondary combined use technology for removing various heavy metals in electroplating wastewater by iron bio-oxidation, comprising the following steps: (1) collecting fermentation biogas slurry, and performing ultraviolet irradiation sterilization after aeration; (2) adding potassium dichromate solution and fresh nutrient solution to the sludge system, and culturing anaerobic sludge; (3) adding treated biogas slurry to the anaerobic sludge, and repeatedly domesticating chromium-reducing microorganisms; (4) configuring a mixed solution of comprehensive electroplating wastewater and biogas slurry according to a certain proportion; (5) building a primary treatment biological reactor, and reducing Cr(VI) in wastewater by anaerobic biological reduction under the promotion of pyrite; and (6) building a secondary biological reactor filled with straw biomass charcoal, and generating iron oxides under the action of functional bacteria to continue adsorbing Cd, Cu and Ni ions in wastewater.

The application discloses a process method for zero discharge of ethylene alkali residue wastewater, which comprises a wet oxidation section, a biochemical section and a salt treatment section; the wet oxidation section comprises a heat exchange unit, a wet oxidation reactor, a cooler and an adjusting tank; the biochemical section comprises an electrodialysis I, aerobic biochemical treatment, ozone catalytic oxidation, anaerobic biochemical treatment, secondary biochemical treatment, a recycled water pool and a methane purification unit; the salt treatment section comprises a tubular microfiltration, an electrodialysis II, a decarbonizer, a salt separation system, a biological reactor and a reverse osmosis; wherein the modified anion exchange membrane used in the electrodialysis has the characteristics of strong anti-pollution ability and high ion exchange rate, can effectively realize the separation of salt and organic matters in the wet oxidation effluent of the ethylene alkali residue, solves the problem of difficult treatment of the organic matters in the wet oxidation effluent of the ethylene alkali residue, and finally realizes zero discharge.

This invention discloses a wastewater treatment system coupled with a solar PV / T-driven photocatalytic and microbial degradation method. This system can degrade dibutyl phthalate (DBP), a recalcitrant substance in wastewater, while simultaneously generating electricity and heat. The system includes a solar PV / T module, a photocatalytic module, and a bioreactor module. The solar PV / T module and the photocatalytic module are integrated into one unit. The PV / T module includes a substrate, an EVA material layer, photovoltaic cells, a solar collector, water pipes, a battery, an inverter, and a hot water storage tank. The photocatalytic module includes a photocatalytic reactor and a pollutant concentration sensor. This invention couples photocatalysis with a microbial method, utilizing renewable solar energy for wastewater treatment. Simultaneously, it couples the wastewater treatment system with a wastewater treatment plant, fully utilizing the electricity and heat generated by the photovoltaic cells within the wastewater treatment plant. Furthermore, when solar irradiance is insufficient, waste heat and electricity from the wastewater treatment plant are connected to the system to ensure normal operation, creating a complementary system.

A reactor apparatus comprising a reactor vessel 32, media conditioning circuit 34 and a fluid flow controller 36 wherein the fluid flow controller allows the flow of fluid through the reactor vessel to be reversed. The external fermentation broth loop has conditioning modules 50 52 that may alter pH, temperature, gases, or remove waste products. The fluid flow controller may reverse the flow automatically at intermittent periods, and may be a pump or valve. In an alternative configuration, there is a media and cell separation device 42 44 that retains cells inside the reactor vessel, allowing circulation of reaction media between the bioreactor and media loop. The cells may be separated from the media through a filter or membrane, or mechanically separated by gravity or centrifugation. Additionally, there may be several reactor vessels that are connected in a cascading (430, Fig 5) or parallel (330, Fig 5) arrangement. A method of operating the reactor apparatus is also disclosed.

The application relates to a PVDF / rGO / Fe(II) composite film as an electro-Fenton cathode, a preparation method, application and membrane filtration reactor. The preparation method comprises the following steps: firstly, preparing a PVDF film by adopting a phase inversion method, covering reduced graphene oxide on the surface of the PVDF film by a suction filtration method to obtain a PVDF / rGO double-layer film; then, dispersing siderite powder in an organic solvent, adding a pore former and PVDF, and stirring and heating to prepare a uniform casting solution; finally, coating the casting solution on the surface of the PVDF / rGO double-layer film to obtain the PVDF / rGO / Fe(II) composite film; the composite film is applied to an organic pollutant and bacteria filtration system or a membrane biological reactor as an electro-Fenton cathode, has excellent anti-pollution effect and bacteria killing capacity, can significantly inhibit the formation of biofilm on the membrane surface, and has a wide application prospect in the aspect of anti-membrane pollution.

The application discloses a BOD real-time online monitoring device and relates to the technical field of water quality monitoring.The device comprises two monitoring units, each of which comprises a water inlet pump, a biological reactor and a water outlet pump which are sequentially connected through pipelines; the biological reactor is a microbial electrolysis cell; the biological reactor comprises a closed shell, a cylindrical cathode and an anode which is arranged in the cathode are arranged in the shell, and an electroactive biofilm is grown on the anode; the water inlet pump is communicated with a water inlet of the shell, and the water outlet pump is communicated with a water outlet of the shell; a data acquisition module is electrically connected with the cathode and the anode; a data processing module is electrically connected with the data acquisition module; a display screen is electrically connected with the data processing module; and a power supply is used for supplying power to the cathode, the anode, the data acquisition module and the display screen. The application realizes real-time online monitoring of BOD.

The utility model relates to an integrated coal-fired power plant heavy metal-containing sewage treatment system and belongs to the technical field of water pollution control. The system is connected with a grit chamber, a microfiltration membrane filter, an ozone catalytic oxidation unit, a photocatalytic oxidation unit, an electrochemical oxidation unit, an ion exchange unit, a magnetic nano adsorption unit and an anaerobic biological filter in sequence through a water inlet through a grid. The anaerobic biological filter is connected with a membrane biological reactor and a reverse osmosis system through an aerobic biological reactor. The utility model system adopts compact design, has small land occupation, low operation cost, stable and efficient treatment effect, and the effluent quality reaches the national discharge standard or reuse requirement. The utility model not only significantly improves the removal efficiency of heavy metal ions, but also realizes energy recovery through sludge anaerobic digestion and biogas power generation, having remarkable environmental benefits and economic value.

The utility model provides a constant-flow water-producing MBR (Membrane Bioreactor) membrane reaction tank device, which relates to the technical field of MBR membrane reaction tank filtration and comprises a reaction tank body, and an MBR membrane body is fixedly connected to the top end of the inner wall of the reaction tank body; a cleaning assembly; the cleaning assembly comprises a motor fixedly connected to the outer side of the reaction tank body, the driving end of the motor is fixedly connected and sleeved with a transmission belt, the end, away from the motor, of the transmission belt is fixedly connected with a transmission wheel, the end, close to the reaction tank body, of the transmission wheel is fixedly connected with a lead screw, and the outer side of the lead screw is in threaded connection with a scraper; according to the design, sediments and sludge on the inner wall of the reaction tank can be effectively cleaned, dirt on the inner wall can be cleaned in the moving process of the scraping plate by combining with a clean water conveying mechanism, and the membrane body can be cleaned at the same time, so that the cleaning efficiency is improved; therefore, the problem that the position of the bottom pool wall is difficult to touch in a traditional cleaning method is effectively solved.

This invention belongs to the field of wastewater biological treatment technology and discloses a method for enhancing the treatment effect of a bioreactor using sludge gasification residue. The method includes the following steps: a) drying, grinding, and sieving the sludge gasification residue to obtain sludge gasification residue with a particle size <80 μm; b) modifying the sludge gasification residue with a particle size <80 μm using polyethyleneimine; c) adding the modified sludge gasification residue to the bioreactor. Under anoxic and aerobic conditions, a biofilm forms on the sludge gasification residue, inhibiting filamentous bacterial expansion, promoting sludge floc granulation, and degrading and removing pollutants from the wastewater. This invention utilizes the modified sludge gasification residue, which forms a biofilm on the residue, inhibiting filamentous bacterial expansion, and promoting sludge floc granulation within 20-30 days, shortening the sludge granulation cycle and improving nitrogen and phosphorus removal efficiency.

The invention discloses an antibiotic wastewater coupling treatment method and system and belongs to the technical field of water treatment. The method comprises the following steps: antibiotic wastewater containing persulfate is injected into a fixed bed reactor, a persulfate oxidation reaction is carried out, the fixed bed reactor is filled with a composite catalyst and an inert filler, and the composite catalyst is a biomass charcoal in-situ growth cobalt-molybdenum bimetallic composite material; the wastewater subjected to the oxidation reaction in the fixed bed reactor is mixed with a nutrient source required by biological metabolism, the mixture is injected into a sequencing batch bioreactor for an aerobic biological reaction, and the sequencing batch bioreactor is filled with a composite biological system formed by kaolin and activated sludge. According to the method, the mineralization degree can be greatly improved, damage to microorganisms caused by ion precipitation in the catalyst can be avoided, the pH value does not need to be independently adjusted, the problem of iron mud treatment does not exist, and long-term stable operation can be achieved.

A process method for flue gas desulfurization wastewater zero discharge treatment, comprising a pretreatment section, a concentration section and a salt separation section; the pretreatment section comprises a hardness removal adjusting tank, a heavy metal removal tank, a coagulation sedimentation tank, an aeration biochemical tank, an ozone catalytic oxidation device, a sludge concentration and dehydration unit and a sludge drying unit; the concentration section comprises a tubular microfiltration, a medium-high pressure reverse osmosis, a low pressure reverse osmosis, an electrodialysis and a biological reactor; the salt separation section comprises a nanofiltration I, a nanofiltration II, a nitrate crystallizer and a salt crystallizer; wherein the electrodialysis adopts a modified anion exchange membrane, which is modified by a polyanion modifier and beta-cyclodextrin together, so that the anti-pollution ability of the membrane is greatly increased, and the selective permeability of sulfate ions is increased; in the process method, the wastewater is not only zero discharged, but also high-purity sodium chloride and sodium sulfate are obtained, and the process method has the advantages of mild operation condition, simple operation, low energy consumption and the like.

The utility model relates to the technical field of bioreactors, and discloses a bioreactor for accelerating the degradation of degradable plastics, which comprises a reaction tank, a driving module and a control module, wherein the bottom of the reaction tank is communicated with a discharge pipe, and the discharge pipe is provided with a biological reaction catalyst spray head; the driving module is in transmission connection with a rocking cylinder capable of rotating in a reciprocating mode and a rotatable filter cylinder, and a smashing bottom roller and two smashing top rollers which are symmetrically arranged are rotationally connected between the inner surfaces of the rocking cylinder. According to the utility model, after the double-head motor outputs the rotating speed, the rocking cylinder swings in a reciprocating manner within a set angle, and the angles of the two crushing top rollers relative to the crushing bottom roller are changed in a reciprocating manner through the reciprocating swinging of the rocking cylinder; the material flow rate of the degradable plastic to be reacted between the crushing top roller and the crushing bottom roller is effectively improved, and the vibration and oscillation blanking effects of the material are realized to a certain extent, so that the blocking rate of the degradable plastic during reaction is reduced, and the crushing reaction efficiency of the reactor on the degradable plastic is improved.

The invention relates to the field of biological denitrification sewage treatment, and particularly discloses a device and a method for anaerobic ammonium oxidation bacteria enrichment and enhanced denitrification in an AOA process. A device for anaerobic ammonium oxidation bacteria enrichment and enhanced denitrification in an AOA process comprises a raw water tank, an AOA bioreactor, a secondary sedimentation tank and a PLC, the AOA bioreactor comprises an anaerobic zone, a high-load aerobic zone, a low-load aerobic zone, an anoxic zone and a reoxygenation zone, a first filler screen box is arranged in the high-load aerobic zone, and a second filler screen box is arranged in the anoxic zone; the method comprises the following steps that sewage sequentially flows through a high-load aerobic zone, a low-load aerobic zone, an anoxic zone and a reoxygenation zone from an anaerobic zone and is precipitated in a secondary sedimentation tank, and supernate is effluent. The device and the method are matched for use, the abundance and the activity of anaerobic ammonium oxidation bacteria in an anoxic zone of the system can be improved through a biological membrane alternate circulation strategy, and the autotrophic nitrogen removal efficiency of the system is improved.

The invention relates to an anaerobic sulfate reduction biological bed reactor for removing multiple pollutants. The anaerobic sulfate reduction biological bed reactor comprises a multilayer anaerobic sulfate reduction biological reactor main body, a reflux system, a feeding system and a backwashing system. A coupling process of a reflux system and an adjusting sedimentation tank is designed in the reactor, and sulfur ions generated in effluent of the reactor flow back to the front end and react with heavy metals in inflow in advance to generate precipitates and separate the precipitates. Meanwhile, the iron-based enhancer with ferrous sulfide as a main component is obtained by reacting part of effluent of reflux with ferrous sulfate, and the reactor is enhanced by adopting different modes according to the water quality condition of the inlet water, so that the removal effect is improved. According to the strategy, the operation cost is reduced, more importantly, before the wastewater enters a biological reaction core area, toxicity inhibition of heavy metal on functional microorganisms is eliminated, and the problem of system collapse caused by the heavy metal in a traditional one-step method is solved.

The invention belongs to the technical field of sewage treatment, and particularly relates to an electrodialysis bioreactor and application thereof in nitrate wastewater treatment. Water chambers and electrode chambers are symmetrically and sequentially arranged on the two sides of the biological chamber outwards; an anode is arranged in the anode chamber, and a cathode is arranged in the cathode chamber; cation exchange membranes are arranged on the two sides of the water chamber adjacent to the anode chamber, and anion exchange membranes are arranged on the two sides of the water chamber adjacent to the cathode chamber; one side of the direct-current power supply is connected with the anode, and the other side is connected with the cathode; hydrogen autotrophic denitrifying bacteria and a carbon source are added into the biological chamber; sewage is introduced into the two water chambers; electric field force is used as driving force, nitrate in the sewage is transferred into the biological chamber in a transmembrane mode, and the nitrate is subjected to denitrification treatment through microorganisms in the biological chamber. According to the method, electrodialysis and biological denitrification are combined, the denitrification efficiency of the wastewater with the low C / N ratio is improved, dependence on an external carbon source is reduced, the denitrification retention time is short, the method is applied to nitrate wastewater treatment, efficient and harmless treatment is achieved, and the process is easy to operate.

The invention discloses a wastewater treatment system and process for POE alcohol production, and the wastewater treatment system comprises a pretreatment unit, a deep oxidation unit, an efficient biodegradation unit, a catalytic oxidation electrolysis coupling unit, a salt-tolerant composite biological treatment unit and a post-treatment unit which are sequentially connected in series, the pretreatment unit comprises an adjusting tank, a demulsification reaction tank and a sedimentation tank which are sequentially connected in series, the deep oxidation unit comprises a supported bimetallic catalytic oxidation reactor, and the efficient biodegradation unit comprises an anaerobic bioreactor and an aerobic bioreactor. The catalytic oxidation and electrolysis coupling unit comprises a catalytic ozonation reactor and an iron-carbon micro-electrolysis reactor, the salt-tolerant composite biological treatment unit comprises a salt-tolerant hydrolysis acidification pool and a sequencing batch moving bed bio-membrane reactor, and the post-treatment unit comprises a precision filter and a disinfection pool. The method has the advantages that an integrated treatment system is constructed, process parameters are optimized, efficient purification of wastewater is achieved, it is ensured that effluent reaches the standard and is discharged, meanwhile, the treatment cost is reduced, and secondary pollution is reduced.

The application discloses a mirror surface pollutant cleaning and collecting mechanism of a sewage treatment biological reactor, a first gear is arranged in the front side wall of the sewage treatment reactor main body, the first gear is connected with the top cover of the sewage treatment reactor main body, the first gear is engaged with a first gear rack arranged in the front side wall of the sewage treatment reactor main body, a second gear is further engaged with the first gear rack, a connecting plate is fixedly connected with a moving plate, a second gear rack is fixedly connected with the end of the connecting plate, and a third gear is engaged with the second gear rack. The mirror surface pollutant cleaning and collecting mechanism of the sewage treatment biological reactor is provided with the top cover capable of being automatically turned over and matched with the filter screen, so that the large garbage and waste, such as large particles and suspended matters, in the sewage to be treated can be collected and treated, the large garbage and waste is prevented from entering the sewage treatment reactor main body and causing the machine to be blocked or even damaged, and the water baffle can be cleaned by the transversely sliding rod and the cleaning brush arranged on the transversely sliding rod.

The present application belongs to the technical field of sewage treatment, and particularly relates to a method for simultaneously improving the denitrification efficiency of sewage and degrading new pollutants. Alcaligenes The present application adopts a new strain of Alcaligenes sp. FDN-09 which is resistant to perfluorinated compounds to carry out large-scale culture, and prepares a high-efficiency functional bacterial agent; under the condition that ammonia nitrogen and new pollutants coexist in sewage, the high-efficiency functional bacterial agent is added in a biological reactor, and the reactor is operated under anoxic and low-oxygen conditions, thereby simultaneously strengthening the removal of ammonia nitrogen and new pollutants in the sewage, and achieving the effect of improving the denitrification of the sewage treatment system while degrading new pollutants. The method of the present application has no secondary pollution to the environment, has high simultaneous degradation rates of total nitrogen and new pollutants, low treatment cost, and low carbon emission. Under the condition that ammonia nitrogen and new pollutants coexist in the sewage, the water quality of the effluent is far lower than the first-level A effluent standard in the modification single of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).

The utility model relates to an MBR (Membrane Biological Reactor) membrane group coupling structure which is used for mounting an MBR membrane group on water treatment equipment. Comprising a guide pipe, one end of the guide pipe is arranged in a fixed framework, and the guide pipe is vertically arranged. The upper end, the lower end and the two opposite side faces of the MBR membrane set are each provided with at least one pair of limiting rods, each guide pipe is located between at least two pairs of limiting rods, one pair of limiting rods are located at the upper ends of the guide pipes, the other pair of limiting rods are located at the lower ends of the guide pipes, and positioning rods are arranged on the limiting rods located at the upper ends in a penetrating mode. The inner side ends of the positioning rods abut against the outer walls of the guide pipes. Wherein the limiting rods and the guide pipes which are arranged in pairs are matched for limiting the MBR membrane group, meanwhile, the MBR membrane group is conveniently fixed on the guide pipes during disassembly and assembly, and the positioning rod is only arranged on the limiting rod at the upper end, so that an operator can conveniently disassemble and assemble the MBR membrane group.

The application provides a process method for treating high-sulfate organic wastewater, which comprises a pretreatment section, a concentration section and a salt separation section; the pretreatment section comprises a softening and adjusting unit, an electrodialysis I, ozone catalytic oxidation, two-stage biochemical treatment and a reuse water pool; the concentration section comprises a tubular microfiltration, a medium-high pressure reverse osmosis, a low-pressure reverse osmosis, an electrodialysis II and a biological reactor; wherein the electrodialysis adopts a modified anion exchange membrane, which is suitable for treating high-sulfate organic wastewater, effectively realizes the separation of salt and organic matters in the wastewater, has good anti-pollution capacity, and can realize the efficient removal of COD in the high-sulfate organic wastewater by combining with the freezing and crystallization technology; meanwhile, the salt is converted into high-purity sodium sulfate decahydrate and sodium chloride products, the wastewater is zero-emission, and the process has the advantages of mild operation condition, simple operation, low energy consumption and the like.

The application discloses a denitrification biological reactor, which comprises a reactor body, a water inlet distribution system, a primary separator, a secondary separator, a circulating pump and a floating sludge pump. The bottom of the side wall of the reactor body is provided with a first water inlet, a sludge inlet and a circulating connection port; the middle of the side wall is provided with a motor port; the upper part of the side wall is provided with a first water outlet; the top is provided with a breathing port. The water inlet distribution system is installed at the bottom of the reactor body and adopts a perforated water distribution form with a hole diameter of 15-50 mm. The application adopts multiple measures to strengthen the degassing effect, increases the gas-liquid contact area, is beneficial to the escape of free gas from water to the gas phase, converts the gas into dissolved state by using the higher pressure of the lower part of the reactor, and reduces the gas amount of the mixed liquid entering the sedimentation module. The degassing is the prerequisite for sludge sedimentation, the strengthened degassing can improve the sludge sedimentation speed from the source and ensure the sludge-water separation effect.

The invention discloses an MBR (Membrane Biological Reactor) filter membrane based on a biological membrane as well as a preparation method and application thereof, and relates to the technical field of water pollution treatment. According to the MBR filter membrane based on the biological membrane, the basic net is inoculated with the activated sludge, the nutrient solution is continuously introduced into the basic net in a horizontal overflow mode in a cross-flow mode, and finally the biological membrane (MBR filter membrane) with the preset thickness is formed. The biological membrane structure of the MBR filter membrane has natural water permeability, the retention rate of activated sludge is high, and the effluent quality is equivalent to that of a commercial micro-filtration membrane; the filtering resistance is basically kept stable within the continuous 180-day operation duration, the bottleneck of flux attenuation caused by membrane pollution of a traditional membrane material is broken through, and near-zero-pollution operation is achieved. The MBR filter membrane also has good self-repairing and self-adaption characteristics, does not need chemical cleaning, and has remarkable environmental protection and economic benefits.

The application discloses a recycling method of graphite negative electrode, nitrogen-doped graphite filler and a wastewater treatment method, and belongs to the technical field of resource recycling. The recycling method of the graphite negative electrode comprises the following steps: grinding waste graphite negative electrode material, then soaking the waste graphite negative electrode material in an acid solution, stirring, filtering and cleaning; mixing the cleaned waste graphite negative electrode material with a nitrogen-doping solution and carrier particles, stirring and granulating to obtain graphite particles mixed with a nitrogen source; the nitrogen-doping solution contains calcium chloride and polyacrylamide; and performing anaerobic sintering on the graphite particles at a temperature of 900-1100 DEG C for 1-3 hours to obtain the nitrogen-doped graphite filler. Through the recycling method, the nitrogen-doped graphite filler with nitrogen-doping amount of 0.1-0.8%, porosity of 40-50% and nitrogen-containing functional groups such as amino nitrogen and graphite nitrogen can be obtained, and the nitrogen-doped graphite filler can be used in an anaerobic biological reactor to remove nickel ions in wastewater.

The application provides a complete water tank of a sludge-free circulating A / O sewage treatment reactor and a design method, and relates to the technical field of environmental protection treatment. The water tank comprises a shell, a baffle and a partition. The shell has a containing space, and is provided with a total water inlet, a total water outlet, an internal circulation water inlet and an internal circulation water outlet. The shell has a first wall and a second wall. The first wall is adjacent to the total water inlet, and the total water outlet is arranged on the second wall. A circulating water pump is arranged near the total water inlet. The number of the baffles is multiple. The multiple baffles are alternately distributed along the top wall and the bottom wall of the shell, forming an up-and-down staggered flow channel. The partition separates the flow channel into a first area and a second area. The internal circulation water outlet is communicated with the first area, the total water outlet is communicated with the second area, and the first area and the second area are communicated near the first wall. The application can accurately design a water tank with a suitable size according to the production site of an enterprise, so that the vertical baffling biological reactor can play its due role in actual production.