60 results about "Biological reactor" patented technology

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 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.

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 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.

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 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 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 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.

The application discloses a kind of printing and dyeing wastewater advanced treatment and salt control reuse process and system, belong to wastewater treatment technical field.The process is sequentially carried out on printing and dyeing wastewater grid interception, adjust homogeneity, coagulation and sedimentation pretreatment;Hydrolysis acidification and membrane biological reactor biochemical treatment;Ozone oxidation break and fluidized crystallization softening softening treatment;Nanofiltration separation obtains permeate and concentrated solution;Crystal seed fluidization descaling is carried out to concentrated solution;Again, nanofiltration permeate and descaling concentrated solution after membrane concentration are carried out by reverse osmosis, obtain sodium chloride and sodium sulfate concentrated solution;Finally, sludge and crystallization waste residue are evaporated and solidified treatment.The application is treated by multiple steps, realizes printing and dyeing wastewater advanced purification and salt efficient separation reuse, solves the problem that nanofiltration salt separation is not pure in prior art and system scaling risk is high.

The utility model provides a modularized splicable MBR (Membrane Biological Reactor) pulse aeration device, which belongs to the technical field of MBRs and comprises an outer shell, an air supply tank and an air distribution cover, the outer shell and the air supply groove are both of a split structure, the air supply groove is located at the bottom of the outer shell and extends in the length direction of the outer shell, an air supply groove air inlet pipe is arranged at one end of the air supply groove, the other end of the air supply groove is a fixed end, air supply groove air outlet holes are formed in the two sides of the air supply groove, and the air distribution cover is installed at the top of the outer shell and provided with a plurality of air outlets. According to the utility model, the modular design is adopted, the assembly is simple, the assembly can be carried out at will according to the actual water treatment project requirements and the different specifications and sizes of the membrane pool, the membrane module device and the membrane component, the length size of the aeration device can be changed along with the assembly, and the application range is wider; the problems of high cost, long period, material waste and the like of reopening the mold are solved.

The present invention relates to a method for treating wastewater in urban wastewater treatment plants that comprises a first step in which urban wastewater is subjected to controlled aeration in a first reactor and passes to a solids settler under the effect of gravity, the water coming out of the settler due to overflowing; a second step of partial nitritation with aerobic granular sludge in a biological reactor, in which the COD (Chemical Oxygen Demand) at values below 125 ppm and the suspended solids at values below 35 ppm are removed from the wastewater, and partial nitritation of the ammonium coming out of the biological reactor with a NO27NH4+ ratio suitable for subsequent autotrophic nitrogen removal; and a third step of anaerobic oxidation of ammonium in a granular ANAMMOX biomass biological reactor.

The present application provides a method for preparing humic acid by activating coal gasification slag, a soil improvement material and its application, and relates to the technical field of resource utilization of coal gasification slag, comprising the following steps: mixing coal gasification slag with organic activation matrix to form a biological reactor; the organic activation matrix comprises at least one of livestock and poultry manure and its compost; the biological reactor is reacted under aerobic conditions, so that the stable carbon structure in the coal gasification slag is biologically activated, and the generation of humic acid and the conversion of fulvic acid to humic acid are promoted, and a soil improvement material is obtained. The present application not only has simple process and low energy consumption, is conducive to the high-value resource utilization of coal gasification slag, but also can significantly improve the content of humic acid and the stability of total humic acid, the product has no obvious ecological toxicity, and is conducive to the improvement of barren soil and the improvement of farmland soil nutrients.

The invention relates to regenerated cartilage based on hydrostatic pressure stimulation and a preparation method and application thereof. The method comprises the following steps: inoculating cells on a porous hydrogel scaffold, placing the porous hydrogel scaffold in a culture medium, performing pressure stimulation by adopting a hydrostatic pressure bioreactor, and performing in-vitro culture for a period of time to obtain the regenerated cartilage based on hydrostatic pressure stimulation. Key mechanical sensitive channels TRPV4 and PIEZO1 are up-regulated through hydrostatic pressure stimulation, a Ca < 2 + > dependent TRPV4 / PIEZO1-Ca < 2 + >-SOX9 mechanical transduction pathway is activated, cartilage formation is promoted, and hypertrophy and ossification are inhibited. Through verification, the bioreactor system is combined with the porous hydrogel scaffold, has good biocompatibility, controllable pore structure and mechanical property, and is suitable for cartilage cell culture. After in-vitro pre-culture for 4 weeks, the cartilage-like construct subjected to HP pretreatment shows a long-term stable regeneration effect in an animal model (such as a goat), and especially in an in-situ auricle microenvironment, inflammation and heterotopic ossification can be effectively inhibited, and an efficient in-vitro cartilage engineering strategy is provided for repairing of various cartilage injuries.

This invention provides a method for treating wastewater from underground water-sealed oil depots, comprising the following steps: Wastewater from the underground water-sealed oil depot enters an oil-water separator to remove petroleum substances; then, the effluent from the oil-water separator sequentially enters the reaction zone, coagulation zone, flocculation zone, and sedimentation zone of a chemical sedimentation tank to remove heavy metals and sulfides; the effluent from the chemical sedimentation tank sequentially enters the aerobic zone, anoxic zone, and MBR zone of a biological reactor to remove COD, ammonia nitrogen, and total nitrogen, and further remove petroleum substances, sulfides, and heavy metals; the effluent from the biological reactor enters an activated carbon adsorber. The treated effluent meets the following requirements: COD ≤ 30 mg / L, petroleum substances ≤ 0.5 mg / L, sulfides ≤ 0.5 mg / L, ammonia nitrogen ≤ 1.5 mg / L, total nitrogen ≤ 1.5 mg / L, total phosphorus ≤ 0.3 mg / L, and mercury ≤ 0.001 mg / L. This invention solves the problem of poor effluent quality after wastewater treatment from underground water-sealed oil depots in existing technologies.

The invention discloses a collaborative sterilization and dynamic cleaning modular bioreactor which comprises a mounting frame, a tank body supporting frame is fixed to the center of the top of the mounting frame through bolts, a reaction tank is fixed to the inner wall of the tank body supporting frame, and a special-shaped top cover is fixed to the top of the reaction tank through bolts. A reaction mechanism is arranged in the reaction tank, and a sterilization mechanism, a feeding mechanism and a cleaning mechanism are arranged on the special-shaped top cover; a rotating mechanism and a sampling mechanism are arranged on the outer side of the cleaning mechanism, and a water supply mechanism is arranged on the outer side of the mounting frame; the sterilization mechanism and the cleaning mechanism are matched to sterilize and clean the reaction tank in all directions, dead-corner-free cleaning of the inner wall of the reactor and module dead corners is achieved, the quality of cleaning operation is guaranteed, manual intervention is reduced, and the efficiency of cleaning operation is improved; the bioreactor can be conveniently and flexibly maintained and overhauled, and the practicability of the bioreactor is improved.

The invention discloses a low-energy-consumption regulation and control method for aquaculture tail water treatment, which comprises the following steps: step 1, tail water pretreatment: removing suspended matters through a 304 stainless steel self-flow microfilter, and driving a rotary drum through water inlet pressure by adopting a rotary centrifugal separation technology; step 2, low-energy-consumption aeration: carrying out coupled aeration by adopting a micro-nano bubble generator and a membrane aeration bioreactor; step 3, biological-ecological synergistic denitrification: inoculating nitrification-denitrification flora in the membrane aeration bio-membrane reactor tank; 4, intelligent regulation and control: dynamically regulating the aeration rate and the reflux ratio based on water quality parameters, and calculating through a regulation and control formula; by integrating physical interception of the 304 stainless steel self-flow microfilter, coupling aeration of the micro-nano bubble-membrane aeration bioreactor and biological-ecological collaborative denitrification, the technical problems of high energy consumption, low treatment efficiency, resource waste and extensive regulation and control in traditional aquaculture tail water treatment are solved, the aeration energy consumption is effectively reduced, and the total nitrogen removal rate is increased.

A method and apparatus for biological treatment of water, the method comprising: a) transporting wastewater into a bioreactor through an inlet fluid conduit; b) transporting the wastewater, in a plug flow pattern, through a mass of carrier elements, said mass of carrier elements having a constant degree of filling of 70% or more of a volume of the bioreactor; wherein the constant degree of filling of the carrier elements restricts movement of the carrier elements, urging the wastewater to move through the reactor in the plug flow pattern; c) treating the wastewater as the wastewater is transported through the carrier elements, the carrier elements having a biofilm layer formed thereon the carrier elements; d) transporting treated water to an outlet fluid conduit; e) repeating steps a) to d) on a continuous basis during an operational state of the bioreactor; f) during steps a) to e), cleaning the carrier elements by ejecting fluid at the mass of carrier elements from a cleaning unit disposed inside the reactor to shear off biofilm from the carrier elements; wherein the sheared off biofilm is suspended in the bioreactor and flow to the outlet fluid conduit with the transported treated water; and wherein a constant liquid volume is maintained in the bioreactor throughout steps a) to f).

The invention relates to the technical field of sewage treatment, in particular to a circulation type recirculating aquaculture water treatment bioreactor device which comprises a biological reaction tank, a circulation auxiliary mechanism I, a circulation auxiliary mechanism II and a gas-liquid double-valve mechanism. The biological reaction tank is provided with a sewage inlet, an air inlet and a liquid outlet pipeline and is filled with biological stuffing, and the circulation auxiliary mechanism II is arranged at the upper part of the biological reaction tank and is connected with the circulation auxiliary mechanism I and the gas-liquid double-valve mechanism through a transmission part. The circulation auxiliary mechanism I eliminates the dead zone and layering phenomenon through lifting rotation driving, the circulation auxiliary mechanism II forms a stable circulation field to prevent filler accumulation, and the gas-liquid double-valve mechanism synchronously controls sewage and gas input. The energy utilization rate is increased, the sewage treatment efficiency is enhanced, the energy consumption is reduced, and the system is suitable for a recirculating aquaculture system.

This invention discloses a method for controlling the mixed liquor suspended solids (MLSS) concentration in a bioreactor based on an activated sludge mathematical model, comprising the following steps: S1, establishing and calibrating an activated sludge mathematical model; S2, setting a target MLSS concentration value for the bioreactor and collecting the MLSS concentration within the bioreactor; S3, calculating the current total mass of activated sludge based on the MLSS concentration and the effective volume of the bioreactor; S4, simulating and predicting the net increase in activated sludge volume within the most recent control period using the activated sludge mathematical model; S5, calculating the target sludge discharge mass for the next control period based on the simulation prediction results of the current total activated sludge mass and the net increase in activated sludge volume; S6, determining the sludge discharge flow rate based on the target sludge discharge mass and the real-time measured sludge concentration. This invention solves the problems of response lag, low adjustment accuracy, and poor adaptability to changes in influent load in existing activated sludge wastewater treatment processes.

The utility model relates to an MBR (Membrane Biological Reactor) membrane pool spraying and defoaming device which comprises a supporting frame arranged above a pool opening of an MBR membrane pool, a plurality of spraying pipes which are distributed at intervals along the length direction of the MBR membrane pool are arranged in the supporting frame, the spraying pipes extend along the width direction of the MBR membrane pool, and the spraying pipes are communicated with the MBR membrane pool. A plurality of water outlet holes which are uniformly distributed at intervals in the length direction of the spraying pipe are formed in the bottom of the spraying pipe, and water in the spraying pipe can be conveniently dripped into the MBR membrane tank through the water outlet holes. The spraying and defoaming device is reasonable in structural design, the spraying pipes are arranged above the pool opening of the MBR membrane pool, the water outlet holes are formed in the bottoms of the spraying pipes, water in the spraying pipes drops into the MBR membrane pool through the water outlet holes, foam is destroyed through water drops, the spraying and defoaming effects on the whole MBR membrane pool are achieved, and the spraying and defoaming device is easy to operate and flexible to use.

The invention discloses water floating type domestic sewage treatment water recycling equipment which is integrated on a floating body platform, and the total occupied area is less than or equal to 3m. The equipment comprises a pretreatment unit, a multi-stage A / O biochemical treatment unit, an intermediate precipitation unit, an MBR membrane deep separation unit, a clear water recycling unit and an intelligent control unit which are sequentially connected in the water flow direction. The biochemical treatment unit forms a high-load bioreactor by adding high-specific-surface-area biological filler; and an immersed ultrafiltration membrane component is arranged in the MBR tank. A trapezoidal rainwater collecting device is arranged at the top of the clear water tank, and intelligent filtering and automatic supplementing of rainwater are achieved through a liquid level sensor and a controller. The system also integrates photovoltaic power supply and mobile phone APP remote control functions, and can efficiently treat domestic sewage and realize cyclic utilization of water resources.