1094 results about "Nitrification" 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 an SND-ED intelligent wastewater treatment deep denitrification system and a control method thereof, and particularly relates to the technical field of wastewater treatment. Nitrification and denitrification reaction environments are provided through the reactor, dissolved oxygen, oxidation-reduction potential and temperature data are collected in real time in cooperation with the data monitoring module, the data are transmitted to the control module, and the control module controls the control module based on an ORP deviation index and a temperature change rate abnormal index. Aeration intensity, aeration time and carbon source dosage are dynamically regulated and controlled through fuzzy logic, synchronous proceeding of nitrification and denitrification is ensured, aeration and carbon source dosage are adjusted according to the dynamic balance state of DO, operation frequency and intensity of an aeration device are optimized through a prediction model based on feedback control, and the carbon source dosage is adjusted. The energy consumption is reduced, and the denitrification efficiency is optimized, so that the intelligent and stable deep denitrification wastewater treatment effect is realized.

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 discloses a karst underground river system multi-source pollution comprehensive quantitative traceability method, which comprises the following steps: S1, multi-dimensional sample collection and new pollutant screening: carrying out multi-period sampling on a water body, measuring conventional water quality indexes and nitrogen and oxygen isotopes, screening new pollutants, and carrying out targeted quantification on characteristic new pollutants; s2, principal component analysis dimension reduction and pollution factor identification: carrying out principal component analysis on conventional indexes and new pollutant data, extracting principal components of which the cumulative contribution rate exceeds 85%, identifying composite pollution factors, and eliminating secondary interference factors; s3, nitrogen and oxygen isotope auxiliary verification and denitrification elimination: eliminating denitrification interference by utilizing the ratio of delta 15N-NO3 <-> to delta 18O-NO3 <-> in combination with underground water burial depth and runoff velocity, and distinguishing the nitrate source as a chemical fertilizer, soil nitrogen or sewage and wastewater; and S4, PMF model optimization and pollution source quantification: inputting the conventional indexes and the new pollutant concentration matrix into a PMF model, and analyzing the contribution rate of each pollution source.

The invention relates to the field of fertilizers, in particular to a stable fertilizer for preventing and treating peanut root rot and a preparation method thereof, and the fertilizer comprises a fertilizer inner core layer, a nano microbial metabolite layer and a microbial protective layer from inside to outside. According to the stable fertilizer for preventing and treating peanut rhizome rot, the capsule embedding inhibitor made of humic acid and the trichoderma aureoviride metabolite are adopted to construct a dual nitrification inhibition system, and the capsule embedding inhibitor and the trichoderma aureoviride metabolite have a synergistic effect, so that the nitrification effect is reduced, the nitrogen fertilizer utilization rate is increased, and non-point source pollution is reduced.

The invention belongs to the technical field of wastewater denitrification treatment, and particularly relates to an anaerobic ammonia oxidation reaction-based integrated partitioned denitrification method which comprises the following steps: S1, removing high-concentration organic matters and suspended matters in wastewater through coagulating sedimentation or chemical oxidation pretreatment to avoid inhibition on subsequent Anammox; s2, partitioning the integrated reactor, and setting a short-cut nitrification region and an Anammox reaction region; s3, enabling the effluent part of the Anammox reaction zone to flow back to the short-cut nitrification zone, supplementing nitrite and balancing the carbon nitrogen ratio; the Anammox granular sludge flows back to the reaction zone through the settling zone, and the biomass concentration and the reaction efficiency are maintained; s4, a secondary sedimentation tank or a built-in sedimentation zone is arranged to achieve mud-water separation, residual sludge is discharged, and it is guaranteed that effluent reaches the standard, and it is guaranteed that the denitrification efficiency is stable by dynamically adjusting dissolved oxygen of the short-cut nitrification zone and the pH value of the Anammox reaction zone.

A biological treatment of sewage device and method for realizing advanced nitrogen removal of domestic sewage by half partical nitrification-anammox coupled with sulfur autotrophic denitrification. The device includes a raw water tank, a half partical nitrification reactor, a regulating water tank and an anammox coupled denitrification reactor. The domestic sewage enters the half partical nitrification reactor, a mass concentration ratio of NO2−—N to NH4+—N in effluent water is 1-1.32 through real-time control, and then the effluent water enters the intermediate water tank. After it enters the upflow anammox coupled with autotrophic denitrification granular sludge reactor, the synergistic reaction of anammox and sulfur autotrophic denitrification in the reactor achieves the nitrogen removal. The device and the method improve denitrification efficiency by making full use of the synergistic effect between microorganisms, thereby realizing high-efficiency and energy-saving advanced nitrogen removal of municipal sewage.

The invention discloses a composite carbon source for sewage treatment and a preparation method thereof, and belongs to the technical field of sewage treatment.The composite carbon source is of a three-layer core-shell structure, an outer shell layer of the composite carbon source is a polyvinyl alcohol / corncob powder composite material, an inner shell layer of the composite carbon source is a corn starch / polyvinyl alcohol / corncob powder composite material, and a core layer of the composite carbon source is an activated carbon loaded chitosan material. The shell layer is formed by mixing polyvinyl alcohol and corncob powder, so that the contact area of the corncob powder and sewage treatment bacteria is reduced, rapid release of a carbon source in the initial stage of the corncob powder is inhibited, and the inner core is wrapped; the inner shell layer is made of a corn starch / polyvinyl alcohol / corncob powder composite material, the corn starch can supplement a carbon source in time relative to the corncob powder, and the corncob powder can continuously provide the carbon source; chitosan in the core layer can provide a necessary carbon source on one hand, and on the other hand, an adsorption material formed by the chitosan and activated carbon can adsorb impurities in water, so that a flocculation precipitation effect is achieved, and the clarity of water in the later stage of denitrification is guaranteed.

The invention discloses a river nitrogen pollutant source analysis method based on drainage basin nitrogen turnover and isotope, and particularly relates to the technical field of water treatment.The river nitrogen pollutant source analysis method comprises the following steps that a drainage basin to be researched is selected, river water and soil samples in the drainage basin are systematically collected, and physical and chemical indexes and isotope indexes # imgabs0 # of the collected samples are tested. Nitrate marked by nitrogen isotope delta 15N / delta 18O and # imgabs1 # are used as key indication marks to perform high-precision identification on nitrogen sources in a river and an environmental system, the contribution proportion of different nitrogen sources to the nitrate concentration in a water body is quantified through a stable isotope analysis model, and the concentration of the nitrate in the water body is calculated. And in combination with data, the rates of denitrification and anaerobic ammonia oxidation in environmental samples, sediments and soil are directly measured through combined application of an isotopic tracer technology and a membrane inlet mass spectrometer technology.

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

A device and method for enhancing nitrogen and phosphorus removal based on a multistage AO partial denitrification coupled with Anammox process in combination with a sludge hydrolytic acidification mixture belong to the technical field of active sludge method wastewater treatment. A system includes a water tank, a water pump, a biochemical reaction zone, a hydrolytic acidification tank and other devices. A multistage AO step-feed pipeline is used to inject raw water into the reaction zone in a segmented manner, guaranteeing efficient utilization of organic matter in the raw water; biofilm carriers are added into an anaerobic zone and anoxic zones to enrich anammox bacteria, and nitrite nitrogen produced by partial denitrification provides a substrate for the anammox bacteria to realize autotrophic nitrogen removal; a nitrification and phosphorus accumulating bacteria aerobic phosphorus uptake are performed in aerobic zones; and part of excess sludge in a secondary sedimentation tank enters the hydrolytic acidification tank to convert macromolecular organic matter into low molecular weight organic matter, a hydrolytic acidification mixture and the excess sludge in the secondary sedimentation tank synchronously flow back to the anaerobic zone, and as a high-quality carbon source, the low molecular weight organic matter can promote partial denitrification. The system provides a novel method for efficient and energy-saving treatment of municipal wastewater.

The invention provides an aerobic denitrifying bacterium with zoogloea character and application thereof, and belongs to the technical field of wastewater treatment, the aerobic denitrifying bacterium is specifically acinetobacter baumannii N-1 (Acinetobacter sp.N-1), the acinetobacter baumannii is preserved in the China Center for Type Culture Collection, and the preservation number is CCTCC NO: M 20242568. The acinetobacter baumannii N-1 provided by the invention not only can perform wastewater denitrification through aerobic denitrification and has efficient denitrification capacity, but also can realize separation of sludge and purified water by forming zoogloea, so that the acinetobacter baumannii N-1 has good application potential in wastewater treatment by utilizing an activated sludge process.

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for synergistically reducing sludge by loading returned sludge and returned nitrification liquid with electromagnetic waves. The method comprises the following steps: 1) treating sewage by adopting an A / A / O reactor, and stably operating for a period of time; 2) introducing a part of sludge obtained in the secondary sedimentation tank as return sludge into the anaerobic tank, continuously exciting the return sludge by electromagnetic waves, and reducing the accumulated sludge yield in the secondary sedimentation tank; 3, part of the nitrification liquid in the aerobic tank serves as backflow nitrification liquid to be introduced into the anoxic tank, the backflow nitrification liquid is continuously excited by electromagnetic waves, and the accumulated sludge yield in the secondary sedimentation tank is reduced. The backflow sludge and the backflow nitrification liquid are cooperatively loaded through the electromagnetic waves, and the sludge can be remarkably reduced.

The invention relates to the technical field of microorganisms, and discloses a sewage aquatic microbe with ammoxidation capacity, a microbial agent and application of the microbial agent. The strain name of the sewage aquatic microbe is B1, and the preservation number of the sewage aquatic microbe is CCTCC No: M 2025640. The sewage aquatic microbacterium B1 provided by the invention can convert ammonia nitrogen into nitrite nitrogen, so that short-cut nitrification is realized in wastewater treatment, and the strain can tolerate and effectively treat ammonia nitrogen with relatively high concentration, and has relatively good adaptive capacity to environments with different pH values, salinity and temperatures.

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 present invention discloses a nitration tail gas absorption treatment system applied to mixed dinitrobenzene production, and relates to the technical field of mixed dinitrobenzene production, the nitration tail gas absorption treatment system comprises an absorption tank, the top end and the bottom end of the absorption tank are respectively provided with a gas outlet and an absorption liquid discharge port, an absorption liquid adding opening and a waste gas introduction pipe are arranged at the positions, close to the top end and the bottom end, of one side of the absorption tank correspondingly, one end of the waste gas introduction pipe extends into the absorption tank and is connected with a gas distribution mechanism, and an absorption liquid lifting and spraying mechanism is arranged in the absorption tank; the absorption liquid lifting and spraying mechanism comprises a lifting pipe, and a plurality of absorption liquid sprayers are communicated with the position, close to the top end, of the periphery of the lifting pipe. According to the invention, the defects in the prior art are overcome, all the components cooperate closely, the absorption treatment efficiency of the nitration tail gas is improved, the stability and reliability are good, long-term stable operation can be realized, the manual intervention demand is reduced, and the operation cost is reduced.

The invention discloses an MABR-based railway domestic sewage treatment system and a use method thereof, and relates to the technical field of sewage treatment, the MABR-based railway domestic sewage treatment system mainly comprises a water inlet unit, an anaerobic zone, an anoxic MABR zone, a transition MABR zone, an aerobic MABR filler zone, a sedimentation tank, a filter unit and a clear water output unit which are connected in sequence, and also comprises a sludge external reflux system and a gas supply system; according to the present invention, the respective advantages of the MABR technology and the water treatment filler are fully utilized, the simultaneous nitrification and denitrification are performed to efficiently remove the pollutants, the denitrification is well achieved by using the transition MABR region, and the pollutants are further removed by using the filtration unit, such that the domestic sewage treatment problem of the staff along the railway line is effectively solved, and the high efficiency, the stability and the sustainability of the sewage treatment are achieved. The method has the advantages of high pollutant removal efficiency, no internal reflux of mixed liquid, reduction of sludge yield, energy conservation, carbon reduction, easiness in operation and the like.

The invention discloses a nitrifying bacterium agent suitable for aquarium, fishpond and other aquatic industries, the strain of the nitrifying bacterium agent is Glutamicacter nicotianae TJ-X, the nitrifying bacterium agent is preserved in Guangdong Microbial Culture Collection Center on February 12, 2025, and the preservation number is GDMCC NO.65877. The invention further discloses a preparation method of the nitrifying bacterium agent. The nitrifying bacteria TJ-X strain suitable for the aquarium industry can perform heterotrophic nitrification and aerobic denitrification under the condition that the salt content is 5wt%, under the condition of laboratory pure culture, within 8 hours, the removal rate of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen is 99% or above, the COD degradation rate is 81%, the nitrifying bacteria TJ-X strain is suitable for the environment where organic matter, ammonia nitrogen, nitrite and nitrate coexist, and the nitrifying bacteria TJ-X strain can be applied to the aquarium industry. The microbial agent has the functions of degrading organic matters such as excrement of ornamental fish and fish food, converting organic nitrogen into inorganic nitrogen, and simultaneously degrading inorganic nitrogen such as ammonia nitrogen, nitrite nitrogen and nitrate nitrogen into nitrogen. And the strain is high in biological safety, high in environmental adaptability and high in growth density, can be applied to water industries with high organic matter content and inorganic nitrogen, such as the aquarium industry and aquaculture, and has a wide application prospect.

The invention discloses a nitrite concentration monitoring method based on a sensor coupling soft measurement model. The method comprises the following steps: S1, acquiring target influence factor data; determining a plurality of target influence factors based on the water quality parameters and the nitrification process of the to-be-monitored sewage; s2, establishing a soft measurement model; the input of the soft measurement model is the target influence factor, and the output of the soft measurement model is the concentration of nitrite nitrogen; s3, determining the concentration of nitrite nitrogen; according to the method, the target influence factor is firstly acquired by utilizing the sensor, and the nitrite concentration is calculated or predicted in real time by utilizing the target influence factor, so that the problems that monitoring equipment is expensive, the monitoring range is small, the monitoring is inaccurate and the monitoring equipment cannot directly monitor the nitrite in the seriously polluted wastewater in the nitrite monitoring in the prior art can be solved.

The utility model relates to a biological fluidized bed tower-type water treatment system, which belongs to the technical field of sewage treatment, and comprises a tower body, the interior of the tower body is divided into an aerobic zone, an anoxic zone and a settling zone through an inner cylinder wall, a flow guide wall and a mud bucket wall, and a gas lifting device is arranged to communicate the interior of the aerobic zone with the interior of the anoxic zone. According to the present invention, the anoxic tank, the aerobic tank and the secondary sedimentation tank are organically combined to form the highly integrated tower reactor, and the occupied area is small compared with the traditional biochemical process; the biological fluidization system is higher in sludge concentration, can tolerate higher salinity, higher COD (Chemical Oxygen Demand) and higher nitrogen-containing wastewater, and is higher in load impact resistance; the oxygen utilization rate of the biological fluidized bed system is improved by 50% compared with that of traditional aeration, the sludge backflow and nitrification liquid circulation of the biological fluidized bed system synchronously adopt the gas stripping technology, a sludge backflow pump and a nitrification liquid backflow pump are reduced, and the operation energy consumption of the system is greatly reduced.

The invention provides a low-carbon ultra-deep denitrification method and device for town sewage, belongs to the field of sewage treatment, and is used for town sewage treatment. In a continuous flow anaerobic-aerobic anoxic alternating-post anoxic process, town sewage and refluxed heavy sludge enter an anaerobic zone of a biochemical pool, refluxed light sludge and added hydroxylamine enter an aerobic anoxic alternating zone of the biochemical pool, and a sludge-water mixed solution flowing out of a post anoxic zone of the biochemical pool enters a secondary sedimentation tank for sludge-water separation; and discharging the supernatant as effluent, separating the precipitated sludge into heavy sludge and light sludge in a cyclone separator, refluxing the heavy sludge and part of the light sludge into the process according to the mode, and discharging part of the light sludge as residual sludge. Microorganisms in the sludge store an internal carbon source in an anaerobic zone of the biochemical pool, short-cut nitrification-endogenous denitrification is realized in an aerobic-anoxic alternating zone of the biochemical pool, and ultra-deep endogenous denitrification nitrogen removal is realized in a rear anoxic zone of the biochemical pool. According to the invention, low-carbon ultra-deep nitrogen removal of town sewage can be realized.

The multi-mode switching sewage treatment system provided by the invention comprises a primary sedimentation tank, a biological tank and a secondary sedimentation tank, and the biological tank comprises a tank body, a partition wall, a gate, a filler, a stirrer, an aeration system, a nitrification liquid reflux pump, a pipeline and a valve system; the tank body forms a biological reaction tank; the biological reaction tank is divided into a pre-anoxic zone, an anaerobic zone, an anoxic zone and an aerobic zone by the partition walls; the gate is arranged on the partition wall, the water flow direction of the sewage treatment system is switched and adjusted through opening and closing of the gate, and the nitrification liquid reflux pump adjusts the quality of reflux liquid through opening and closing of the gate so as to be switched to different modes of multiple modes of the sewage treatment system; the pipeline and valve system performs flow control on sewage, sludge and air, and different modes of multiple modes are switched by opening and closing the gate and adjusting the position of the filler. According to the invention, the switching of the sewage treatment system in different modes under different conditions is realized.

The invention relates to an MABR-based short-cut nitrification and denitrification coupled micro-aerobic biochemical treatment method, and relates to the technical field of water treatment. The device mainly comprises a two-stage MABR-PN / DN tank, a two-stage MABR micro-aerobic tank, a sedimentation tank, a gas supply system and a monitoring system, the MABR-PN / DN tank and the MABR micro-aerobic tank are respectively implanted into an MABR membrane box, sewage sequentially passes through the first-stage MABR-PN / DN tank, the first-stage MABR micro-aerobic tank, the second-stage MABR-PN / DN tank, the second-stage MABR micro-aerobic tank and the sedimentation tank, and the gas supply system is independently arranged and supplies gas to the MABR-PN / DN tank and the MABR micro-aerobic tank through pipelines. According to the invention, a short-cut nitrification and denitrification process and a low-aerobic nitrification and denitrification process are established by taking a microbial film growing on the outer surface of the MABR membrane filament as a carrier, meanwhile, a two-stage MABR-PN / DN tank and a two-stage MABR micro-aerobic tank are utilized, a nitrification liquid internal reflux system is not arranged to remove nitrogen, and the effluent index of a municipal sewage treatment plant is improved. The method has the advantages that the pollutant removal effect is good, the addition of an external carbon source is saved, the occupied area is saved, the treatment period is short, the energy consumption is low, and the sludge yield is reduced.

The invention relates to the technical field of sewage treatment, and particularly provides a method and a system for realizing beneficiation wastewater N, N-diethyldithiocarbamate-C-N-S synergistic oxidation-reduction coupling treatment by an MABR oxygen layering process. According to the method and the system, a time sequence dissolved oxygen (DO) dynamic regulation and control strategy is innovatively developed: through periodic / pulse type switching anaerobic-hypoxia-aerobic conditions, oxygenolysis and ammonification reaction of N, N '-diethyldithiocarbamate are intensified directionally, and toxicity inhibition of intermediate products on functional bacteria is relieved. Based on the strategy, the system can accurately utilize biological membrane oxygen gradient spatial distribution in a single MABR reactor to realize a cascade reaction of sulfur oxidation-ammonification-aerobic nitrification-anoxic denitrification of ethyl sulfur nitrogen; or aiming at high-concentration diethyldithiocarbamate (gt; 50 mg / L) is coupled with a front anaerobic reactor, and ammoniation detoxification and denitrification nitrogen removal are enhanced.

The utility model aims to provide the nitrogen and phosphorus removal filter with the ozone micro-ecological environment, which is used for removing nitrogen and phosphorus through microorganisms and treating sewage through ultraviolet sterilization. A water inlet is formed in the barrel body, and a water outlet is formed in the barrel body. The mechanical filtering module is arranged on the barrel body, is connected with the water inlet and is used for filtering and primarily treating the sewage; the ozone microorganism module is arranged between the mechanical filtering module and the barrel body and is communicated with the mechanical filtering module, an anaerobic zone, a facultative oxygen zone and an aerobic zone are formed in the ozone microorganism module, and nitrification and denitrification reactions are fully carried out for recirculating aquaculture and nitrogen and phosphorus removal treatment of aquaculture tail water; and the ultraviolet module is arranged on the outer side of the barrel body and is used for sterilizing and disinfecting the culture water or the culture tail water. The utility model is applied to the technical field of nitrogen and phosphorus removal filters.

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 discloses an enhanced denitrification method and device for a constructed wetland with a high-void-ratio filler, and aims to create favorable conditions for deep nitrification by screening light materials and constructing a high-low-high gradient resistance layer and inducing flow velocity differentiation to form an oxygen concentration fluctuation zone. Function switching type microorganisms with nitrification-denitrification bidirectional conversion capacity are cultured, and a seasonal flora switching mechanism and a complementary symbiotic network are established to adapt to annual temperature change; multi-point distributed water supply is designed to form a river branch type water flow path, and bionic water flow distribution is achieved; the periodic change of the water level of pulsating water inlet is used for driving gas exchange in the filler to form a tidal breathing effect, and deep oxygen supply can be realized without mechanical aeration; and real-time monitoring is carried out based on an intermittent operation time table, and operation parameters are dynamically optimized. According to the invention, the problems of limited oxygen transfer and seasonal performance fluctuation of the traditional constructed wetland are solved, and a technical scheme with low energy consumption and high stability is provided for nitrogen-containing wastewater treatment.

The utility model discloses vertical sewage treatment equipment based on an MABR (Membrane Aerated Baffled Reactor) membrane. The vertical sewage treatment equipment comprises a water distribution system, an MABR reaction zone, an MABR membrane component, a gas supply and flushing system, a clear water zone, a backwashing automatic control system, a water production system and a liquid level control system. The sewage treatment system is short in process and simple to operate, compared with other sewage treatment systems, complicated processes and control of an anaerobic zone, an anoxic zone, an aerobic zone, a reflux system and the like are reduced, standard discharge of sewage is realized by only adopting one treatment process of the MABR, the aeration efficiency is 4-5 times of that of a conventional aerator by adopting an MABR bubble-free aeration technology, and the sewage treatment system has the advantages that the sewage treatment system is simple in structure and low in cost. The device is simple in structure and free of a nitrification liquid reflux pump, a sludge reflux pump and a stirrer, equipment investment and energy consumption are greatly reduced, the vertical tank body structural design is adopted, and compared with other integrated equipment, the occupied area is greatly saved.

The invention discloses a membrane filtration sewage treatment system based on fine control, relates to the technical field of sewage treatment, and solves the technical problems of delayed response to water quality and water quantity fluctuation and extensive biochemical reaction control caused by water inlet load impact in an existing sewage treatment system. The system comprises an inflow water pretreatment module used for predicting inflow water quality in real time by using a water quality prediction model based on a neural network, and carrying out water quantity balance and water quality adjustment on inflow water according to a prediction result to obtain a first water body; the biochemical reaction module is used for cooperatively controlling external carbon source addition, nitrification liquid backflow and aeration intensity in the biological reaction process of the first water body by utilizing a multivariable model predictive control method to obtain a second water body after biochemical reaction; and the deep purification module is used for carrying out solid-liquid separation and deep purification on the second water body to obtain an effluent water body, and triggering cleaning and maintenance operation of the membrane based on a prediction result of the membrane pollution characteristics.

The invention relates to the technical field of sewage treatment, in particular to an internal and external backflow automatic control system for sewage treatment. The system comprises an internal reflux system and an external reflux system, and the internal reflux system adjusts the frequency of internal reflux pumps or the number of started internal reflux pumps by monitoring the change of water quality parameters such as nitrate nitrogen, nitrite nitrogen, ammonia nitrogen and dissolved oxygen so as to maintain the balance of nitrification and denitrification reactions; and the external reflux system adjusts the flow of an external reflux pump by monitoring the sludge concentration and the sludge level height so as to maintain the concentration and activity of microorganisms in the biological reaction tank. Besides, the system also adopts a mathematical model, a feedforward control strategy and a feedback control module, so that the response speed and the stability of the system are improved, the effective treatment of sewage is ensured, and the overall treatment efficiency and the effluent quality are improved.