573 results about "Nitrogen removal" patented technology

The invention relates to the technical field of microorganisms, and provides a low-temperature-resistant heterotrophic nitrification-aerobic denitrification pseudomonas and application thereof, the strain is pseudomonas (Pseudomonas sp.) SW1, and the preservation number is CCTCC (China Center for Type Culture Collection) NO: M 20221797. The low-temperature-resistant heterotrophic nitrification-aerobic denitrification bacterium Pseudomonas sp. SW1 has the characteristic of low temperature resistance, can well grow at 4-10 DEG C, and has relatively strong heterotrophic nitrification-aerobic denitrification nitrogen removal capability, and the enrichment culture of the strain is carried out in a relatively low nitrogen source, and the condition is extremely consistent with the application scene of the strain in domestic sewage.

The invention discloses a sewage denitrification dosing method and system based on machine learning and a storage medium, and belongs to the technical field of sewage treatment.The method includes the steps that data are collected and preprocessed, and variable data influencing biochemical pool carbon source dosing behaviors are obtained; and lagging influence of carbon source input on the denitrification amount index is analyzed, and the duration time range of the drug effect is determined. And adopting the trained prediction model, and based on the denitrification amount index and the prediction variable of the future t + X period, obtaining the dosage of the (t + 1) th period. Through a correlation analysis method, the correlation rule of nitrogen conversion in the future X period after the carbon source is added is analyzed, the duration time of the drug effect is determined, the lag effect is accurately quantified, and the problem of mismatching of regulation and control opportunities is avoided. The hysteresis effect is captured and subjected to multi-factor coupling analysis based on the prediction model, the carbon source adding amount and time are optimized, system load fluctuation caused by excessive carbon sources or incomplete nitrogen removal caused by insufficient carbon sources are avoided, and the stability of an original sewage ecological system is gradually improved.

An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation units are arranged into interconnected high-pressure and low-pressure gas recycling loops powered by high-pressure and low-pressure compressors. The multi-stage membrane system can be integrated with deoxygenation and auxiliary nitrogen removal systems. The combined system provides for the generation of efficient contaminant removal from raw biogas to generate high-purity methane products with reduced compression energy consumption.

The invention discloses low-temperature-resistant and high-salt-resistant aerobic pseudomonas kirschner kirschner K2 as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out low-temperature and high-salt enrichment culture; screening and domesticating, and monitoring the concentration of ammonia nitrogen; and after 3-5 times of enrichment culture, diluting the enrichment culture, further culturing until a macroscopic bacterial colony is obtained, and then picking and carrying out plate streaking to separate a pure strain. The invention also relates to application of the strain in preparation or prevention of nitrification and denitrification nitrogen removal drugs in treatment of high-salt nitrogen-containing wastewater. The strain is low-temperature-resistant and high-salt-resistant heterotrophic-aerobic denitrifying bacteria, has the characteristic of low temperature resistance, grows well at low temperature and high salt salinity, has higher heterotrophic nitrification-aerobic denitrification nitrogen removal capacity, is suitable for nitrogen removal treatment of high-salt wastewater such as food processing wastewater and landfill leachate, and has wide application prospects. The superiority is particularly obvious under a low-temperature condition.

The invention relates to the technical field of sewage treatment, in particular to a coupling control system and method for deep denitrification of sewage, and the system comprises a real-time water quality monitoring module, a microorganism twinborn modeling module, a real-time prediction module, an intelligent decision module, an execution mechanism module and a prediction regulation and control module. Compared with the prior art that a passive feedback control strategy based on an effluent quality index is generally adopted, the hysteresis quality is high, and violent fluctuation of an inflow load cannot be coped with; according to the method, a digital twinborn body capable of reflecting the functional state of a microbial community in real time is constructed, and a control target is improved from a traditional process parameter set point to direct optimization of microbial ecological functions; according to the invention, the method achieves the fundamental crossing from the control of technological parameters to the regulation and control of microbial ecology, can carry out intervention from the root of the reaction process, enables the system to have the active health management capability, and remarkably improves the stability of the treatment efficiency and the intelligent level of coping with complex working conditions.

The invention discloses a gradient optimization control method for an aeration system of a sewage plant. The gradient optimization control method comprises the following steps: S1, acquiring key monitoring multi-source data of the aeration system of the sewage plant in real time through an online sensor; s2, setting a security threshold value of each monitoring data to form a security constraint condition; s3, taking unit nitrogen removal energy consumption minimization as an optimization target, and constructing a comprehensive loss function fusing an energy consumption item and a water quality deviation item; s4, iteratively updating the air volume of the aeration system by adopting a self-adaptive gradient algorithm; s5, the optimized and updated air volume is issued to the aeration equipment to be executed, and water quality data and energy consumption data after execution are collected in real time, a control effect is calculated, an award signal is generated, and the award signal serves as feedback to be input into an optimization module; and S6, dynamically adjusting key parameters including the learning rate and the gradient threshold according to a feedback result. According to the invention, the energy consumption can be effectively reduced and the control precision can be improved while ensuring that the effluent stably reaches the standard, and the stable operation of the aeration system of the sewage plant under a complex working condition is ensured.

The invention provides an intelligent control method for sewage biological nitrogen removal and denitrification carbon source addition, which combines an ASM activated sludge mechanism model based on a sewage biological treatment mechanism and an AI artificial intelligence model based on data driving to construct an ASM-AI mixed model, can accurately simulate a nitrogen removal and denitrification reaction process in a sewage treatment process, and has the advantages of simple operation, high accuracy and high practicability. On the basis, the optimal carbon source feeding amount is obtained by setting a target function, carbon source feeding in the denitrification process is intelligently controlled, accurate control over carbon source feeding is achieved through real-time data monitoring, ASM-AI mixed model prediction and continuous training of an ASM-AI mixed model, the nitrogen removal efficiency of denitrification is improved, and the nitrogen removal efficiency of denitrification is improved. The carbon source adding cost is saved, and the stability, high efficiency and economical efficiency of biological sewage treatment denitrification are ensured.

The invention discloses a high-entropy oxide for synergic nitrogen removal and catalysis as well as a preparation method and application thereof, and belongs to the technical field of material preparation, the high-entropy oxide is a single solid solution phase formed by five or more metal elements of Fe, Co, Ni, Cu, Mn, Ti and Ce and an oxygen element, the configuration entropy of the high-entropy oxide is greater than or equal to 1.5 R, R is a gas constant, and R is an oxygen constant. The mole fraction of each metal element is 0.1-0.3, and the sum of the mole fractions of the metal elements is 1. According to the high-entropy oxide with the synergistic nitrogen removal and catalysis effects and the preparation method and application thereof, a synergistic catalysis system is constructed through the high-entropy oxide and silicon carbide, and the high-entropy oxide has the multiple advantages of being high in nitrogen removal efficiency, high in stability, simple in process, environmentally friendly and wide in application range; the removal rate of total nitrogen and key nitrogen pollutants can reach 90% or above in the seawater high-salt environment, and the environment-friendly emission requirement is met.

The invention belongs to the technical field of sewage treatment, and particularly relates to an anaerobic ammonia oxidation-photoelectric denitrification deep nitrogen removal method. The method comprises the following steps: firstly, adopting a double-chamber reactor; introducing part of sewage into the cathode chamber, carrying out Anammox reaction under a dark state condition to remove ammonia nitrogen and part of nitrite nitrogen, and synchronously generating nitrate nitrogen; turning on a light source to irradiate the anode chamber, exciting photo-induced electrons by a photosensitizer, transmitting the photo-induced electrons to the cathode chamber through an external circuit, and driving the sulfur autotrophic denitrification sludge to reduce residual nitrite nitrogen and nitrate nitrogen generated by Anammox; the total nitrogen removal rate is close to 100%. According to the invention, photo-induced electrons are used as the only denitrification electron donor, so that the addition of a carbon source / sulfide is thoroughly avoided, and the risk of secondary pollution is eliminated. The method is suitable for green low-carbon deep treatment of sludge digestion liquid and pharmaceutical wastewater high-ammonia-nitrogen low-carbon-nitrogen-ratio sewage.

The invention discloses a landfill leachate anaerobic-denitrification treatment process and system based on waste molasses synergistic interaction, and belongs to the technical field of sewage treatment. The process comprises the following steps: (1) carrying out two-stage anaerobic digestion on the landfill leachate to remove organic matters and recover biogas, wherein first-stage anaerobic digestion adopts medium-temperature (35 + / -2 DEG C) anaerobic digestion, and second-stage anaerobic digestion adopts high-temperature (55 + / -1 DEG C) anaerobic digestion; (2) removing impurities from the waste molasses, diluting the waste molasses, mixing the diluted waste molasses with activated sludge, fermenting under an anaerobic condition to generate fermentation liquor rich in volatile fatty acid, and adding the fermentation liquor into a denitrification reactor; and (3) constructing an anaerobic-denitrification synergistic system, and increasing the denitrification rate by using the charcoal-loaded nano zero-valent iron (nZVI at BC) as an electronic mediator. According to the method, resource utilization of the waste molasses is realized, the problem of imbalance of the carbon nitrogen ratio of the landfill leachate is solved, anaerobic digestion and nitrification and denitrification processes are coupled, efficient nitrogen removal and organic matter removal are realized, and meanwhile, the sludge yield and the operation cost are reduced.

The invention relates to a vertical flow enhanced biological denitrification device and a sewage treatment method, a denitrification agent adding assembly is additionally arranged at a proper position of an existing vertical flow reaction device, namely the outer side of an outer inclined flow guide part, a corresponding enhanced denitrification agent can be added at a selected point position, a denitrification reaction is further enhanced, and the denitrification effect is improved. The selective reaction of the functional microorganism reaction is improved, nitrate generated by the anaerobic ammonia oxidation reaction is consumed, and a sufficient matrix is provided for anaerobic ammonia oxidation, so that the anaerobic ammonia oxidation reaction is greatly promoted, and the total nitrogen removal rate is further improved; by accurately controlling the dosing position and accurately dosing according to the reaction, the nitrogen removal efficiency of the autotroph is enhanced, the coordination of the minimization of the dosing amount of the medicament and the maximization of the nitrogen removal efficiency is realized, and finally, the green, low-carbon, economical and efficient nitrogen removal target of the sewage is achieved.

The invention relates to the technical field of sewage treatment, in particular to a method for improving the denitrification nitrogen removal performance of a corn or rice straw fermentation carbon source by using industrial glucose. According to the method, the straws are soaked and pretreated by adopting calcium peroxide, and meanwhile, in the anaerobic fermentation process, the anaerobic condition is kept through nitrogen, and zero-valent iron is added to obtain the straw fermentation liquor. Fermentation liquor and industrial glucose are mixed to serve as a composite carbon source, the activity of microorganisms in a sludge system is stimulated through the usability of the glucose, and the utilization rate of the microorganisms to the rice and corn fermentation liquor carbon source is increased; anaerobic fermentation conditions of rice and corn straws are optimized, the carbon source release rate is increased, the complexity of carbon source composition of fermentation liquor is utilized, the diversity of microorganisms is improved, excessive propagation of the microorganisms is avoided, and the biological denitrification capacity is improved. The method disclosed by the invention is beneficial to resource utilization of agricultural wastes, reduces the biological denitrification cost of sewage with a low carbon-nitrogen ratio, and promotes green and low-carbon development of sewage treatment.

The invention discloses a Fe / C loaded membrane module, a PN / A-MABR autotrophic nitrogen removal device, a preparation method and a sewage treatment method, and belongs to the technical field of sewage treatment. According to the invention, the problem that the treatment effect is influenced by NO3 <->-N accumulation in the existing membrane aeration coupling partial nitrification-anaerobic ammonia oxidation process is solved. Comprising a frame and a membrane body attached to the outer portion of the frame, the membrane body comprises a hydrophobic organic membrane layer, an iron-carbon material layer and a biological membrane layer which are sequentially arranged, and the hydrophobic organic membrane layer is attached to the outer portion of the frame. The iron-carbon material is added between the hydrophobic organic membrane layer and the biological membrane layer, the iron-carbon micro-electrolysis process is coupled with the dissimilatory process of nitrate generated by microbial metabolism, the removal of NO3 <->-N generated by anaerobic ammonia oxidation is enhanced, and the total nitrogen removal efficiency is improved.

The invention relates to the technical field of agricultural waste treatment and utilization, and discloses a method and system for treating biogas slurry through electrochemical membrane ammonia stripping. The method comprises the following steps: (1) adding a flocculating agent into the biogas slurry for flocculation treatment; (2) inputting the flocculated biogas liquid supernatant into a cathode chamber of an electrolytic bath, separating the cathode chamber from an anode chamber of the electrolytic bath by a cation exchange membrane, carrying out water electrolysis reaction in the electrolytic bath, and carrying out aeration stripping on the biogas liquid supernatant in the cathode chamber while carrying out water electrolysis reaction, the obtained ammonia gas is blown off from the biogas slurry supernatant under the disturbance of aeration. According to the method disclosed by the invention, the electrolytic bath is modified, and a specific electrochemical method is combined, so that relatively high ammonia nitrogen removal and recovery efficiency can be achieved under the conditions of no addition of an alkaline agent and no heating, and the problems of high cost and low ammonia removal efficiency of a biogas liquid ammonia recovery process are solved.

The present invention discloses an artificial natural wetland system and its purification method. Among them, the artificial natural wetland system includes an artificial ecological channel, an artificial plant ecological pond, and an artificial substrate ecological pond; wherein, the artificial ecological channel includes a flow channel and a valve arranged on the flow channel; the artificial plant ecological pond includes a plant pond and a water inlet and a water outlet respectively located on opposite sides of the plant pond; the water inlet is communicated to the flow channel; the plant pond includes a shoal area and a deep water area, the shoal area is planted with emergent plants, and the planting density is 10 - 30 plants / m²; the deep water area is planted with submerged plants, and the submerged plants cover 30 - 50% of the water surface area of the plant pond, and the biomass of the planted submerged plants is 2000 - 9000 g / m²; the artificial substrate ecological pond is communicated with the water outlet of the artificial plant ecological pond; the present invention can effectively provide the carbon source required for the denitrification of microorganisms without supplementing external carbon, and improve the nitrogen removal efficiency.

The invention relates to the technical field of sewage / wastewater denitrification, in particular to a method for predicting and explaining denitrification performance and microbial abundance of a single-stage PNA system, which comprises the following steps: constructing an ML model of nitrogen removal rate and functional microbial abundance, and incorporating key water quality and operating parameters into the model to improve the interpretability and prediction accuracy of the model; and the influence of each input feature on the model and the optimal range of the environmental parameters are determined, so that targeted operation adjustment is realized. Quantitative analysis is carried out through the model, potential synergistic effects among the characteristics can be explored, and therefore the optimal characteristic range can be found, the wastewater treatment efficiency can be improved, and the optimal water environment can be obtained.

An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation units are arranged into interconnected high-pressure and low-pressure gas recycling loops powered by high-pressure and low-pressure compressors. The multi-stage membrane system can be integrated with deoxygenation and auxiliary nitrogen removal systems. The combined system provides for the generation of efficient contaminant removal from raw biogas to generate high-purity methane products with reduced compression energy consumption.

The invention relates to the technical field of equipment compensation control, and discloses a medical suction device with an altitude compensation function and a control method thereof. The method comprises the following steps: reading ambient air pressure data of a first pressure sensor, reading molecular sieve tank differential pressure data of a second pressure sensor, collecting pressure data of an output end of a third pressure sensor, and determining a real-time altitude according to the ambient air pressure data; a breathing pressure fluctuation value is calculated based on the molecular sieve tank differential pressure data, when the breathing pressure fluctuation value is lower than a preset negative pressure threshold value, the current breathing frequency is recorded, and nitrogen removal time, pressure equalizing time and flushing time are determined to control an electromagnetic valve to work; and when the oxygen concentration is lower than a first concentration threshold value and the real-time altitude height is lower than a preset height, increasing the nitrogen removal time by a first preset proportion and increasing the target rotating speed by a second preset proportion, and when the oxygen concentration is lower than a second concentration threshold value, stopping the operation of the compressor and closing all the electromagnetic valves. According to the invention, the false alarm rate is effectively reduced, and the equipment safety is improved.

The invention discloses a horizontally opposed synchronous biological nitrogen and phosphorus removal MBR (membrane bioreactor) sewage treatment method, which adopts a horizontally opposed parallel architecture design that an aerobic membrane tank is directly coupled with an anaerobic tank and an anoxic tank to realize automatic synchronization, function switching and independent regulation and control of biological nitrogen and phosphorus removal. Comprising the following steps: sewage is firstly pretreated and then is simultaneously delivered to an anaerobic tank and an anoxic tank in proportion; the anaerobic tank is directly coupled with the aerobic membrane tank to form a biological phosphorus removal cycle, and the anoxic tank is directly coupled with the aerobic membrane tank to form a biological nitrogen removal cycle. The aerobic membrane tank is filled with a membrane component, the downstream side of the aerobic membrane tank is communicated with the separation area, and the separation area is provided with an upper-layer nitrification liquid backflow system, a middle-layer sludge backflow system and a lower-layer phosphorus-rich sludge fixed-discharge system. According to the technical scheme, the internal contradiction that biological nitrogen removal needs low load and long sludge age, and biological phosphorus removal needs high load and short sludge age is solved, function exchange of an anaerobic zone and an anoxic zone can be achieved, nitrogen removal priority or phosphorus removal priority can be switched, and the biological nitrogen and phosphorus removal effect can be independently regulated and controlled.

The invention relates to the technical field of organic wastewater resource utilization, in particular to a device and method for preparing a composite carbon source from high-concentration organic wastewater, and the device comprises a hydrolysis device, an acidification device, a separation device and a concentration device which are connected in sequence; the hydrolysis device and the acidification device are respectively provided with an up-flow type hydraulic circulation stirring system, and are provided with a labyrinth inclined plate and an effluent weir in a matched manner, so that low-consumption and high-efficiency mud-water separation can be realized; through an intelligent adjusting system, the temperature and pH value in the hydrolysis and acidification process can be automatically controlled, the fermentation efficiency of the material can be improved, the preparation period of the carbon source can be shortened, and the stability of the product can be improved; the quality of the carbon source is further improved through physical processes such as membrane separation and membrane concentration; the high-concentration organic wastewater generated in the processing process of organic garbage and agricultural products is converted into a high-added-value recycling product, and the high-concentration organic wastewater is applied to the denitrification process of a sewage treatment plant, so that the denitrification performance is improved, and the recycling utilization of the high-concentration organic wastewater is realized.

The utility model discloses AO + MBR (membrane bioreactor) integrated sewage treatment equipment, and aims to provide an efficient, stable and economical sewage treatment solution. The equipment integrates an anoxic zone, an aerobic zone, a clean water tank, an upper-layer equipment zone and a lower-layer equipment zone, and realizes organic matter degradation, denitrification, dephosphorization and disinfection processes through a submersible stirrer, an aerator, an MBR membrane assembly, a rotary blower, a water production / backwashing pump, a reflux pump and a plurality of dosing devices. The equipment is skillfully designed, such as a double-layer structure, a single-pump dual-purpose device, a pipeline type oxygen eliminating device and the like, so that the effective utilization of space and the flexibility of operation are ensured, and meanwhile, the treatment effect is ensured to meet or exceed the first-grade A emission standard. Besides, by reducing the equipment size, simplifying the pipeline system and adopting the integrated design, the engineering cost and the operation and maintenance difficulty are remarkably reduced, and the device is suitable for small sewage treatment projects and shows excellent performance and economic benefits of integrated equipment.

The invention discloses a sewage treatment system which is composed of a grating pretreatment unit, an oil separation tank, a high-speed air flotation machine, a coagulation primary sedimentation tank, a hydrolytic acidification and anoxic tank, a screening nano bubble generator, a contact oxidation and aerobic tank of microbial filler, a microbial preparation coagulation sedimentation unit, a sludge treatment unit, a sulfur-autotrophic phosphorus and nitrogen removal unit, an ultraviolet disinfection unit and the like. The air dissolving efficiency of the micro-charge high-speed air flotation machine is as high as 95-99%, the equipment volume is only 1 / 5 of that of traditional equipment, and the decontamination and separation effects are good; the water outlet and air outlet amount of the screening nano bubble generator is 10 times larger than that of a conventional nano aerator, ionized water, small molecular group water and magnetized water are generated in a combined mode, so that charges are carried, the solubility and the permeability are high, microorganisms are activated, the biochemical rate is increased, pollutants are effectively removed, sludge is degraded, and the sludge yield is reduced. The coagulation of the microbial preparation enables the inclined tube precipitation effect to be better, and the sulfur autotrophic technology and the efficient denitrification of the denitrification filter material solve the problems of insufficient carbon sources and denitrification, so that the sewage treatment constantly reaches the standard.

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 utility model belongs to the technical field of sewage treatment equipment, and provides a deep nitrogen removal sewage treatment system which comprises an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank and an autotrophic nitrogen removal filter tank which are connected in sequence, wherein the anaerobic tank is connected with the outlet end of the water inlet pump; a supporting layer and a sulfur autotrophic carrier filler layer are arranged in the middle of the autotrophic nitrogen removal filter, a water inlet and a backwashing water outlet of the autotrophic nitrogen removal filter are positioned above the sulfur autotrophic carrier filler layer, and a water outlet of the autotrophic nitrogen removal filter is positioned below the supporting layer; the liquid level meter, the backwashing water pump and the aeration fan are connected with the controller; the liquid level meter is arranged in the autotrophic nitrogen removal filter tank, and the outlet ends of the backwashing water pump and the aeration fan are connected to the lower part of a supporting layer in the autotrophic nitrogen removal filter tank. The system integrates heterotrophic denitrification and autotrophic denitrification to realize deep denitrification and filtration treatment, does not need to add a carbon source, can synchronously remove COD, ammonia nitrogen, TN, TP and SS, and effectively ensures the effluent quality.

The present invention relates to a multifunctional modular wetland pilot test device for denitrification and phosphorus removal. The present invention is applicable to the technical field of artificial wetlands. The technical solution adopted by the present invention is: a multifunctional modular wetland pilot test device for denitrification and phosphorus removal, characterized in that: it has a device body, an inlet pipe system and an outlet pipe system; the device body includes a main frame and a water outlet layer arranged at the bottom of the main frame, and a plurality of module filling grids arranged in the main frame and above the water outlet layer, and the module filling grids are filled with fillers; the inlet pipe system includes an inlet branch pipe connected to one end of each column of module filling grids and is equipped with a gate valve for controlling the on-off of the inlet branch pipe, and the outlet pipe system includes an outlet branch pipe connected to the other end of each column of module filling grids and is equipped with a gate valve for controlling the on-off of the outlet branch pipe.

The utility model belongs to the field of denitrification nitrogen removal filler frames, in particular to a denitrification nitrogen removal filler frame convenient to clean, which comprises a sewage treatment tank and a filler body, a plurality of mounting frames are fixedly connected to the inner wall of the sewage treatment tank, a frame is slidably connected to the inner cavity of each mounting frame, and the filler body is fixedly connected to the inner wall of the sewage treatment tank. A lifting plate is fixedly connected to one side of the frame, the lifting plate is L-shaped, a connecting plate is fixedly connected to one side of the lifting plate, and a driving mechanism is arranged on one side of the sewage treatment tank; the transmission rod can be driven to rotate through the adjusting handle, and the connecting plate on one side of the frame is in threaded connection with the first mounting rod, so that the first mounting rod rotates to drive the frame to be slidably mounted along the inner cavity of the mounting frame and mounted in a sewage treatment tank, and multiple groups of filler frames can be synchronously dismounted and mounted; and the effect of conveniently cleaning the filler frame is improved.

The utility model discloses an advanced treatment system for high-concentration nitrogen-containing organic wastewater, which sequentially comprises an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a sulfur autotrophic denitrification filter tank and a limestone filter tank, a water passing hole is formed in the upper part of a wall body between the anaerobic tank and the anoxic tank, a hollow aeration fiber membrane assembly is arranged in the anoxic tank, an aeration pipe is arranged at the bottom of the aerobic tank, a mixed liquid reflux pump is arranged at the bottom of the aerobic tank in a penetrating manner and is connected with the anoxic tank through a pipeline, and the aeration pipe is connected with the anoxic tank through a pipeline. A sludge reflux pump penetrates through the bottom of the secondary sedimentation tank and is connected with the anaerobic tank through a pipeline. Iron-carbon micro-electrolysis is intervened in the anaerobic reactor to achieve the purposes of improving the biodegradability of high-concentration degradation-resistant wastewater and enhancing biochemical treatment, and the nitrogen removal mode of anaerobic section MABR bubble-free aeration synchronous nitrification and denitrification is organically combined, so that the treatment load of the system and the utilization rate of activated sludge are improved.

The utility model relates to the technical field of nitrogenous wastewater treatment, in particular to a nitrogenous wastewater treatment device. The device comprises a reactor, an aeration assembly, a water inlet assembly and a monitoring assembly, a guide cylinder is coaxially arranged in the reactor; the reactor is filled with microorganism balls; the monitoring assembly comprises a main controller and a plurality of detection probes; the main controller is arranged outside the reactor, and each detection probe is arranged inside the reactor; the main controller is respectively connected with each detection probe through a line; one end of the water inlet assembly is communicated with nitrogenous wastewater, and the other end is communicated with the bottom of the reactor; the water inlet assembly comprises a water inlet pump connected with the main controller; one end of the aeration assembly is communicated with air or oxygen, and the other end is communicated with the bottom of the reactor; and the aeration assembly comprises an air blower connected with the main controller. The device disclosed by the utility model has the effects of simple and compact structure, small occupied area, low operation cost and good nitrogen removal performance.

The invention relates to the technical field of sewage biochemical treatment, and discloses a preparation method of an efficient composite biological carbon source, which comprises the following steps: solid-liquid two-phase fermentation treatment, microbial community echelon relay treatment, fermentation liquor reflux and biological detoxification system and biomass enhancement treatment. According to the invention, the preparation of the composite biological carbon source with high concentration (COD > = 50,000 mg / L), high stability (stable operation time > = 120 days) and high activity is realized by combining solid state fermentation and liquid state fermentation, constructing a microbial echelon metabolic network, applying a porous carrier layer to eliminate an inhibitor, implementing active factor regeneration and other technical means; according to the present invention, the organic matter conversion efficiency is improved by more than 30%, the stable operation time of the system is improved, the technical problems of insufficient concentration, unbalanced components, poor stability and the like in the traditional carbon source preparation are solved, the method is suitable for the nitrogen and phosphorus removal process of the large-scale sewage treatment plant, the total nitrogen removal rate of the sewage treatment system can be improved by 15-25%, and the nitrogen removal rate can be improved by 30-40%.

The present invention provides an autotrophic denitrification filter material, comprising three types of materials A, B, and C, and the weight ratio of each material is A: B: C = (10-15): (1-2): 1, wherein A is a composite denitrification ingredient, including ferrous sulfide, sulfur, sodium thiosulfate and iron powder; B is an adhesive; and C is a molecular sieve treated with a microbial culture solution. The high efficiency of the autotrophic denitrification filter material with high efficiency denitrification provided by the present invention is mainly based on the following two options: first, the filter material belongs to a multivalent composite sulfide-iron coupling denitrification scheme, and the diverse electron donors of the autotrophic denitrifying bacteria have synergistic synergy; second, the autotrophic denitrifying bacteria culture solution is pre-placed in the gap of the molecular sieve, which can be slowly released, ensuring that the autotrophic denitrifying bacteria can still maintain growth when the environment is subjected to various shocks. The autotrophic denitrification filter material provided by the present invention has a simple preparation process, is easy to operate during application, and can maintain high efficiency in denitrification capacity.