306 results about "Biological reactor" patented technology

The invention relates to the technical field of sewage treatment, and discloses an MABR (Membrane Aerated Baffled Reactor) sewage treatment device which comprises an upper bracket and a lower bracket, the upper bracket and the lower bracket are fixedly connected through a connecting frame, a membrane wire group is mounted between the upper bracket and the lower bracket, the interior of the lower bracket is hollow, and the interior of the lower bracket is communicated with the membrane wire group; the top of the lower support fixedly communicates with a Y-shaped air inlet pipe, and a stirring assembly is arranged on the back face of the lower support. The stirring assembly comprises a gas collecting frame fixed to the back face of the lower support through a support. According to the sewage treatment device for the MABR membrane bioreactor, the driving assembly mounted on the drainage pipe can be used for rotating and driving the plurality of aeration pipes, so that sewage can be stirred in a large range, the contact area of water and a biological membrane on the outer side of the membrane wire group is increased, and meanwhile, an auxiliary oxygen supply effect is also achieved, so that the reaction efficiency is enhanced; and the washing assembly can be matched to wash and clean the membrane filament group, so that the practicability of the equipment is improved.

The invention discloses a perchlorate wastewater treatment method which comprises the following steps: discharging perchlorate wastewater into an adjusting tank, and adjusting and buffering water quality in the adjusting tank; discharging the adjusted wastewater into a coagulating basin, and adding a coagulant to react with suspended solids in the wastewater; feeding the wastewater subjected to the coagulation reaction into a sedimentation tank, and completing solid-liquid separation in the sedimentation tank; discharging the precipitate, and enabling the treated wastewater to enter a microbial catalysis tank; perchlorate in the treated wastewater is subjected to biodegradation in a microbial catalysis tank; carrying out MBR (Membrane Biological Reactor) treatment on the wastewater subjected to biodegradation, intercepting microorganisms in the wastewater in a biological catalysis tank, and discharging the wastewater which does not contain the microorganisms and is subjected to biodegradation into an RO (Reverse Osmosis) membrane treatment device; the wastewater is subjected to reverse osmosis treatment at the RO membrane treatment device, reverse osmosis concentrated water is conveyed to the biological catalysis tank, and reverse osmosis fresh water is conveyed back to the water purification tank. The biological enzyme catalysis and membrane separation method is adopted, so that the perchlorate wastewater can be discharged after reaching the standard, and the treatment process is efficient, convenient and low in cost.

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 belongs to the technical field of sewage treatment, particularly relates to an MBR (Membrane Biological Reactor) for deeply treating sewage in an urban sewage treatment plant, and provides the following scheme aiming at the problems that the sewage treatment process is interrupted, the cleaning is incomplete, aeration holes are blocked by dirt and the like in the existing membrane filter tube cleaning process. The sewage treatment device comprises a sewage tank, two treatment tanks are arranged in the sewage tank, fixed pipes are fixed in the two treatment tanks, the outer walls of the two fixed pipes are rotationally sleeved with two hollow rotating discs, and a plurality of membrane filter pipes are rotationally connected between the two hollow rotating discs located in the same treatment tank. The treatment tanks can be alternately used when the membrane filter tube is cleaned, sewage treatment can be continuously completed, the membrane filter tube can be cleaned, the inner wall of the membrane filter tube can be uniformly coated with a cleaning agent in the cleaning process, and the membrane filter tube is effectively cleaned.

The invention discloses a method for controlling membrane pollution of an anaerobic membrane bioreactor (ANMBR) by jointly adding a biosurfactant and a filler, the ANMBR is used for treating municipal sewage, the biosurfactant and the filler are added into the ANMBR, and a membrane component and a mechanical stirring device are arranged. The membrane pollution control process is as follows: a biological surfactant with a certain concentration and a filler with a certain volume ratio are jointly added into the reactor. According to the invention, the biosurfactant is added into the AnMBR reactor to promote the dissolution of viscous substances and insoluble substances in a sludge mixed solution, and dissolved organic molecules are wrapped by micelles formed by the surfactant, so that the contact between organic pollutants and the membrane surface is reduced. Further, filler is added, so that the attachment of sludge flocs in the suspension and the adsorption of biosurfactant solubilizing substances are facilitated, the concentration of the sludge flocs, organic matters and other substances in the mixed solution is reduced, and finally, the membrane pollution of the AnMBR is effectively retarded on the premise of ensuring the remarkable operation efficiency of the reactor.

The utility model relates to the technical field of sewage treatment, in particular to an MBR (Membrane Biological Reactor) sewage treatment device, a treatment assembly is arranged inside a reactor main body, a cleaning assembly is arranged at a position, corresponding to the treatment assembly, of the top of the reactor main body, and the treatment assembly comprises a fixed frame arranged at the top of the reactor main body; membrane main bodies are installed on the inner side of the fixing frame at equal intervals, a sewage pipe is fixedly installed at the top of the fixing frame, a water inlet pipe is installed at the liquid inlet end of the sewage pipe, connecting bent pipes are installed between the sewage pipe and the liquid inlet end of the water inlet pipe, and an air inlet pipe is fixedly installed at the edge of the outer wall of the reactor main body; an aeration pipe is mounted at the liquid outlet end of the bottom of the gas inlet pipe. According to the MBR sewage treatment device disclosed by the utility model, the membrane component can be efficiently and conveniently cleaned, the working efficiency of a user is effectively improved, the practicability of the whole device is improved, and a better use prospect is brought.

The invention discloses a biological denitrification device and a denitrification method for sewage with a low carbon-nitrogen ratio. The denitrification device comprises a raw water tank, a bioreactor and a secondary sedimentation tank which are connected in sequence, wherein the bioreactor sequentially comprises an anaerobic zone, a swing zone, an anoxic zone and an aerobic zone; the swing area is provided with four stages of reaction tanks which are arranged in a split mode, and the dissolved oxygen concentration and the hydraulic retention time of each stage of reaction tank are adjusted based on the inflow water quality. When the system disclosed by the invention is used for treating sewage with a low carbon-nitrogen ratio, an exogenous carbon source does not need to be added through a specific technological process, so that the operation cost of the system is remarkably reduced, and efficient biological phosphorus removal can be realized while the nitrogen removal efficiency is remarkably improved.

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 utility model provides a microfluidic electrical stimulation chip device and a system for promoting cells to secrete exosomes by using the device, the microfluidic electrical stimulation chip device comprises an upper substrate, a microfluidic electrical stimulation chip body and a lower substrate, a liquid inlet and a liquid outlet are etched or tapped on the upper substrate in a hollowed-out manner, an upper substrate electrode is embedded in the lower surface of the upper substrate, and a lower substrate electrode is embedded in the lower surface of the lower substrate. A micro-channel liquid inlet section, a micro-channel reaction section and a micro-channel liquid outlet section are engraved on the micro-fluidic electrical stimulation chip body, and a lower substrate electrode is embedded in the upper surface of the lower substrate; the system for promoting the cells to secrete the exosomes by using the device comprises a cell supply bioreactor, a power device, a micro-fluidic electrical stimulation chip device, a power supply device and a cell recovery bioreactor, and can realize on-line electrical stimulation treatment of the cells in a normal suspension culture process of the cells; cell suspensions flowing through a plurality of micro-channels in the micro-fluidic electrical stimulation chip are stimulated through electrical signals, cells are promoted to secrete exosomes, and the yield of the exosomes is increased.

The invention relates to the technical field of wastewater treatment, and discloses a chemical wastewater treatment process which comprises the following steps: S1, pretreatment: removing large impurities and suspended solids in wastewater by adopting a mechanical grid, and adjusting the pH value of the wastewater; s2, adding a coagulant to coagulate and precipitate the chemical sewage; s3, biological treatment: decomposing organic matters in the sewage by using a bioreactor; s4, oxidation treatment: removing refractory organic matters by using an ozone reactor; s5, sedimentation: removing residual suspended matters by using a sedimentation tank; and S6, disinfection treatment: through multi-stage treatment steps such as pretreatment, coagulating sedimentation, biological treatment and oxidation treatment, suspended solids, organic matters and refractory pollutants in the sewage are effectively removed, it is ensured that the effluent quality meets the environmental protection standard, and in the biological treatment stage, the optimal growth environment is provided for microorganisms by regulating and controlling dissolved oxygen, temperature and pH value, so that the quality of the microorganisms is improved. The removal efficiency of the organic matters is improved.

The utility model discloses a cleaning manipulator for a parallel bioreactor, which comprises a rotary joint unit and a lifting unit, the rotary joint unit comprises n groups of rotary joint kinematic pairs arranged step by step, and each group of rotary joint kinematic pair comprises a first rotary driving mechanism and a rotary arm, the first rotary driving mechanism is in transmission connection and seal fit with the rotary arm, and the lifting unit is in transmission connection and seal fit with a first group of rotary joint kinematic pairs in the rotary joint unit. According to the clean manipulator for the parallel bioreactor, provided by the utility model, automatic liquid adding can be realized, the working efficiency is improved on the premise of ensuring no pollution, and the clean manipulator has the advantages of timeliness and reliability, so that cell culture is more convenient and efficient.

The invention belongs to the technical field of sewage treatment equipment, particularly relates to an MBR (Membrane Biological Reactor) for advanced treatment of papermaking wastewater, and aims to solve the problems that dirt is attached to the outer wall of the existing MBR, the dirt in a reaction tank cannot be removed, the treatment function is single, and the water quality cannot be further improved. A sewage treatment structure for treating sewage is arranged in the reaction tank, a rotating shaft is rotatably connected to the inner wall of the bottom of the reaction tank, a bearing plate for bearing the sewage treatment structure is fixed to the top of the rotating shaft, and scrapers are fixed to the two sides of the top of the bearing plate. In the sewage treatment process of the membrane filter tube, dirt attached to the outer wall of the filter frame can be removed through cooperation of the bearing plate and the scraper, meanwhile, oxygen can be alternately injected into the reaction tank and the clear water tank through rotation of the bearing plate, the water quality in the clear water tank can be improved, and sewage in the reaction tank can be conveniently treated.

Aspects of the invention relate to a wastewater treatment method (100) and a wastewater treatment plant (1) for treating wastewater. The wastewater treatment method (100) includes receiving wastewater to be treated. The wastewater is supplied to a bioreactor (13) for biofiltration of the wastewater. The wastewater is discharged from the bioreactor (13) to a mechanical filtration device (15) arranged downstream of the bioreactor (13). The mechanical filtration device (15) comprises a static filtration pack (75) for filtering solid waste suspended in the wastewater. The static filter pack (75) contains a plurality of mechanical filter elements (71), each having one or more filter units (73). And discharging the treated wastewater.

The invention discloses a biological coupling treatment device and method for high-salt organic wastewater, and relates to the technical field of wastewater treatment.The biological coupling treatment device comprises a pretreatment unit, a biological treatment unit, a physical and chemical treatment unit, a desalination unit and a post-treatment unit, the bio-membrane reactor comprises a biological reaction tank and an MBR membrane assembly, activated sludge is arranged in the biological reaction tank, an aeration assembly and a limiting assembly are arranged at the bottom of the MBR membrane assembly, a flow pushing assembly is arranged on the bottom side in the biological reaction tank, and the MBR membrane assembly comprises a frame. According to the invention, the aeration structure is optimized, the permeability of the MBR membrane is guaranteed, the cleaning frequency is reduced, the service life of the membrane is prolonged, in addition, the aeration structure is optimized, so that bubbles are uniformly distributed, and the oxygen content of each region is kept uniform.

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 MBR (Membrane Biological Reactor) dispersive sewage treatment device with an electric flocculation function. The MBR dispersive sewage treatment device comprises a filtering device; the purifying device is connected with the filtering device, and the purifying device is provided with an electronic flocculator, an electrode plate arranged in the electronic flocculator, a scraping plate abutting against the electrode plate and a driving device for driving the scraping plate to reciprocate relative to the electrode plate. Compared with the prior art, the MBR dispersive sewage treatment device with the electric flocculation function has the advantages that the electrode plate in the electronic flocculator is electrified, so that ions in sewage are subjected to reduction reaction on the electrode plate, the flocculation reaction is promoted, and the purpose of purifying water is achieved. When scale is generated on the electrode plate after long-time reaction, the driving device is started to enable the scraping plate to reciprocate up and down relative to the electrode plate, scale impurities on the electrode plate can be effectively removed, the cleaning efficiency is high, use is convenient, and the problems that manual cleaning is troublesome, cleaning is not thorough, and the electric flocculation electrolytic reaction efficiency is affected are solved.

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.

The utility model relates to an MBR (Membrane Biological Reactor) pool membrane curtain lifting and replacing device which comprises a support provided with a lifting hook and a supporting cross beam, the supporting cross beam is provided with a moving groove along the length direction, the moving groove is connected with a lifting driving mechanism, the lifting driving mechanism is provided with a lifting rod connected with the support, two sides of the support are provided with elastic rods, and the elastic rods are connected with the lifting rod. The elastic rods are connected with arc-shaped clamping plates, and the concave faces of the arc-shaped clamping plates are correspondingly arranged on the opposite sides. The arc-shaped clamping plates prevent a frame of the membrane curtain from shaking along the lifting hooks, so that the membrane curtain is protected from colliding with the wall of an MBR pool, and the damage rate of the aged membrane curtain is reduced.

The invention relates to the technical field of sewage treatment, in particular to an intelligent control sewage treatment system which comprises an MBR (Membrane Biological Reactor) master control system end, a sewage treatment system end, a multi-mode cooperative control end and a fault feedback control end, the MBR master control system end is connected with the sewage treatment system end, the multi-mode cooperative control end and the fault feedback control end through electrical signals, and the sewage treatment system end is connected with the multi-mode cooperative control end through electrical signals. According to the MBR system for sewage treatment, the automation degree of the MBR system for sewage treatment is increased, the cooperative control logic of all subsystems (such as water production, backwashing, chemical washing, backflow, excess sludge and emptying) is effectively improved, the conflict between backwashing and chemical washing processes is avoided, the membrane pollution cleaning effect is enhanced, the equipment failure treatment efficiency is effectively improved, and the energy consumption is reduced. And the system operation and maintenance efficiency is improved.

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.

The utility model discloses an MBR (Membrane Biological Reactor) sewage treatment device, and relates to the technical field of sewage treatment devices, in particular to an MBR sewage treatment device, which comprises a bearing mechanism, an executing mechanism is arranged on the bearing mechanism and is convenient to disassemble and assemble during cleaning, and the executing mechanism comprises a conveying mechanism, comprising a main three-way pipe arranged on the upper portion in a bearing mechanism, and the two ends of the main three-way pipe are connected with auxiliary three-way pipes; the fixing assembly comprises fixing frames arranged on the two sides of the lower portion in the bearing mechanism, second auxiliary holes are formed in the four corners of each fixing frame, and a plurality of MBR membranes are installed at the upper ends of the fixing frames and used for treating impurities in sewage; the treatment assembly comprises side frames installed at the two ends of the top of the fixing frame, and water pipes are arranged above the side frames; the problems that in the scheme, each MBR membrane is independently connected with the pipeline on the main frame, and due to the design, when the MBR membranes are detached for cleaning, the operation difficulty and inconvenience are high are solved.

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 invention relates to the technical field of MBR membranes, in particular to an MBR flat membrane repairing method which comprises the following steps: tearing off a filter membrane and flow guide cloth which are used for a long time or are damaged; covering the surface of the guide plate with a new filter membrane and guide cloth; and the filter membrane and the flow guide cloth are welded on the flow guide plate by adopting a convex welding knife. The convex welding knife is used for directly heating and welding to form the groove, so that the filter membrane and the guide plate are welded together, the processes of polishing and welding rib attaching are reduced, the manpower is saved, the working efficiency is improved, and the welding effect is also enhanced.

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 present application relates to a sterilization control method for a bioreactor, including: when a first bioreactor is sterilized in air and a second bioreactor is fermented in biological fermentation, the second valve of the first bioreactor and the fourth valve of the second bioreactor are controlled to be opened, and the fourth valve of the first bioreactor and the second valve of the second bioreactor are controlled to be closed; when the first bioreactor is fermented in biological fermentation and the second bioreactor is sterilized in air, the fourth valve of the first bioreactor and the second valve of the second bioreactor are controlled to be opened, and the second valve of the first bioreactor and the fourth valve of the second bioreactor are controlled to be closed. The present invention improves the steam utilization rate, thereby reducing the waste of water resources and thermal resources as a whole, and solves the problem of low resource utilization rate in the current steam air sterilization method of reactors.