233results about How to "Improve denitrification effect" patented technology

The invention relates to the technical field of biological sewage treatment, in particular to a device and a method for improving the autotrophic nitrogen removal performance of an MABR (Membrane Ammonia Baffled Reactor). Coupling of partial nitrosation reaction and anaerobic ammonia oxidation reaction is completed; through a circular reaction zone and a membrane reaction zone in the reaction tank, nitrate nitrogen generated by anaerobic ammonia oxidation and excessive nitrite nitrogen during instability regulation are circularly removed, and the purpose of improving the total nitrogen removal effect of the reactor is achieved; a proper amount of a sodium nitrite solution is added at proper time, the concentration of free nitrous acid in a mixed solution of the reactor is increased, and the intermittent proportion of MABR intermittent aeration is synchronously regulated and controlled, so that the activity of nitrite oxidizing bacteria is synergistically inhibited by low dissolved oxygen and high free nitrous acid, and the unstable short-cut nitrification reaction is recovered again; the autotrophic nitrogen removal performance of the reactor is improved.

The invention discloses a sulfur-manganese composite autotrophic denitrification filler as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and polluted water treatment. The sulfur-manganese composite autotrophic denitrification filler contains manganese salt, a sulfur-based component and a cement-based component, the manganese salt comprises one or more of manganese carbonate, calcium manganese ore and rhodochrosite; the sulfur-based component comprises sulfur and sulfur manganese ore; the cement-based component comprises cement, fly ash pottery sand, silica fume, blast furnace slag and metakaolin; the cement comprises one or more of Portland cement, iron aluminate cement and sulphoaluminate cement. The nitrogen removal efficiency of the sulfur-manganese composite autotrophic denitrification filler is superior to that of a sulfur autotrophic denitrification system, the sulfate concentration and nitrite nitrogen accumulation in effluent are remarkably reduced, the service life of the filler is prolonged, and the efficient utilization rate of the material is improved.

The invention provides an intelligent optimization control method and platform under variable load operation of a coal-fired power plant, and relates to the technical field of intelligent optimization control, and the method comprises the steps: calling historical operation data, carrying out the load trend change analysis, and completing the construction of a control analysis module; analyzing and outputting instantaneous PID control parameters according to the real-time load data; after the instantaneous PID control parameters are switched to, a flue gas emission acquisition module is activated; real-time flue gas emission parameters are obtained; performing denitration control optimization to obtain a real-time PID control parameter, and switching to the real-time PID control parameter; presetting a flue gas emission window, dynamically updating real-time flue gas emission parameters, dynamically updating real-time PID (Proportion Integration Differentiation) control parameters and performing seamless switching control on an SCR (Selective Catalytic Reduction) system. The control method solves the technical problem that when a control method in the prior art is used for dealing with an SCR system, efficient control is difficult to achieve under the dynamically-changing load condition, and then the denitration effect and the system stability are affected.

The invention relates to the technical field of water treatment, in particular to a denitrification slow-release composite carbon source as well as a preparation method and application thereof. Comprising the following components in percentage by weight: 2-10% of hydroxy acrylic acid, 2-10% of saccharides, 5-15% of straw waste liquid, 5-15% of kitchen waste liquid, 2-10% of saccharides, 3-15% of porous volcanic ash, 5-15% of polyvinyl alcohol, 0.2-1% of inorganic salt, 1-2% of polypeptide, 0.5-1% of growth factors, 0.2-1.5% of MFC agar, 0.1-0.5% of cellulase, 0.1-0.5% of protease, 0.1-0.5% of denitrifying bacteria and the balance of water. The sum of the percentages of the raw materials is 100%. The invention has the advantages that: each nutrient component is balanced, the nutrition is comprehensive, the activity of denitrifying bacteria is improved, the number of species and community layers of a biological system of a sewage treatment plant are increased, the growth of various microorganisms is facilitated, nutrient substances can be fully utilized, and the denitrification effect is far higher than that of related carbon sources such as single methanol, glucose and the like.

The invention belongs to the field of wastewater treatment. The invention provides a manganese-carbon composite controlled-release material as well as a preparation method and application thereof. The manganese-carbon composite controlled-release material comprises the following components: a manganese-rich mineral, a natural plant carbon source, a cementing material, aggregate, an additive and a foaming agent. The manganese-carbon composite controlled-release material disclosed by the invention can regulate and control the carbon release and manganese circulation process by virtue of the interaction between manganese and carbon, so that the electron transfer and mass transfer efficiency is remarkably improved, synergistic denitrification is realized, the overall denitrification efficiency is remarkably improved, and synchronous nitrogen and phosphorus removal and self-adaptive continuous denitrification are realized. The raw materials required for preparing the manganese-carbon composite controlled-release material are environment-friendly and low in price, the preparation process is simple, the preparation cost is low, and the manganese-carbon composite controlled-release material can be applied to filler in a submerged area of an artificial wetland, a biological filter and a biological retention system, and can be widely applied to application scenes such as tail water advanced treatment of a sewage treatment plant, rural agricultural sewage treatment and initial rainwater purification.

The invention belongs to the technical field of sewage treatment, and discloses an anaerobic ammonia oxidation enhanced denitrification device and method based on an electron mediator type biological carrier and iron oxide. The anaerobic ammonia oxidation enhanced denitrification device comprises a reactor main body, a heat preservation circulating water device, a stirring device, a water inlet pipeline and a water outlet pipeline, anaerobic ammonium oxidation bacteria are contained in the reactor main body, a certain proportion of electron mediator type biological carriers are filled in the reactor, and a proper amount of iron oxide is added; wherein the added high-valence iron oxide can be used as an extracellular electron acceptor of anaerobic ammonium oxidation bacteria, the electron mediator type carrier can be used as a redox mediator, and nitrogen removal of the anaerobic ammonium oxidation system is promoted by strengthening the extracellular electron transfer process of the anaerobic ammonium oxidation bacteria.

The invention belongs to the field of sewage treatment, and particularly relates to a preparation method and application of a biological composite carbon source, and the preparation method comprises the following steps: mixing waste beer yeast liquid and biodiesel byproducts, adding an enzyme preparation, carrying out mixing reaction, and separating out supernatant to obtain the biological composite carbon source. The biological composite carbon source disclosed by the invention is low in production cost, rich in nutritional ingredients and high in adaptability, and has long-term effectiveness, high denitrification rate and denitrification effect.

The invention discloses a material and method for reducing the content of heavy metals and nitrogen and phosphorus in bottom mud, the material is suitable for reducing the content of heavy metals and nitrogen and phosphorus in bottom mud, and the material comprises the following components in parts by mass: 100 parts of calcareous shale, 20-40 parts of steel slag, 6-10 parts of activated carbon powder and 6-10 parts of medium-coarse sand; the sintering material is formed by sintering a mixed material, and the mixed material comprises the following components in parts by mass: 100 parts of calcareous shale, 20-40 parts of steel slag, 6-10 parts of activated carbon powder and 6-10 parts of medium-coarse sand; and 2-4 parts of an adhesive. The material for reducing the contents of heavy metals and nitrogen and phosphorus in the bottom mud not only blocks the pollution of sludge to water quality, but also effectively reduces the contents of heavy metals and nitrogen and phosphorus nutrients in the bottom mud in situ, and can reduce the thickness of the bottom mud, improve the characteristics of the bottom mud and really realize harmless treatment of the bottom mud.

The invention relates to the technical field of sewage treatment equipment, in particular to an electrolytic biological filter system for rapid treatment of overflow pollution and an operation method, a bioelectrochemical system is coupled with a biological aerated filter to form the electrolytic biological filter system for rapid treatment of overflow pollution; the rapid electron transfer characteristic of a bioelectrochemical system is fully utilized, the denitrification rate of the biological aerated filter is improved, the treatment time can be greatly shortened under the same denitrification requirement, and the effect of rapidly treating overflow pollution in emergency is achieved.

The invention discloses a method for reinforcing anaerobic ammonia oxidation denitrification and dephosphorization of an urban sewage treatment plant by using a falling biological membrane. The method is realized based on a system consisting of two main units, namely a functional area I and a functional area II. Inlet water of the first functional area and part of outlet water of the settling pond enter a second functional area anoxic zone (8), and sludge of the second functional area flows back to a first functional area nitrogen and phosphorus removal unit (1) of the urban sewage treatment plant from a second functional area settling pond (9) through a sludge backflow pipeline (10). Therefore, the overall anaerobic ammonium oxidation bacteria abundance of the suspended sludge in the system of the functional area I is enhanced, and the denitrification performance is further improved. The anoxic zone reduces the nitrogen load of the whole system, and meanwhile, part of carbon sources saved in the anaerobic ammonia oxidation process are beneficial to biological phosphorus removal. According to the method, the nitrogen and phosphorus removal performance can be effectively improved without interrupting operation of the sewage treatment plant, and the method is suitable for upgrading and reconstruction of a built urban sewage treatment plant or deep nitrogen and phosphorus removal of a newly built sewage treatment plant.

The invention discloses a device and a method for realizing double short-range coupling anammox deep denitrification and phosphorus recovery by using in-situ sludge fermentation. The method comprises the following steps: adding a calcium chloride solution into a rear-end anammox reactor of a two-stage PNA process to form recyclable phosphorus crystal substances such as Ca-P precipitate, and enabling anaerobic ammonium oxidation bacteria to be attached to the surface of the precipitate and to be enriched and intercepted in the anammox reactor; in the continuous forming process of anaerobic ammonia oxidation particles, unfermented waste activated sludge is added into the PNA technology, a carbon source is provided for short-cut denitrifying bacteria by means of slow hydrolysis and acidification of the waste activated sludge, and conversion from single-stage PNA autotrophic nitrogen removal to double short-cut coupling anammox synergistic nitrogen removal is completed. The anaerobic ammonium oxidation bacteria in the operated granular sludge can reach 12%, 73% of the sludge has the sludge particle size of 200 [mu] m or above, the total nitrogen removal rate is kept to be 90% or above, and most phosphorus exists in a recyclable form of Ca-P crystal substances.

The invention relates to the technical field of sewage treatment, in particular to a method and device for purifying printing and dyeing wastewater based on TAPB-DMTA COF Fenton-like synergistic bacteria and algae. According to the specific technical scheme, the printing and dyeing wastewater purification method comprises the following steps that 1, printing and dyeing wastewater is introduced into a photocatalytic Fenton-like reactor, porosity-modified photocatalysts TAPB-DMTA COF and H2O2 are added into the photocatalytic Fenton-like reactor, a baffle plate is arranged in the photocatalytic Fenton-like reactor, the angle of the baffle plate is 30-45 degrees, and the angle of the baffle plate is 30-45 degrees; a first illumination module is arranged outside the photocatalytic Fenton-like reactor; and (2) introducing the wastewater treated in the step (1) into an algal-bacterial symbiotic SNAD reactor, and adding a photocatalyst and a multi-walled carbon nanotube into the algal-bacterial symbiotic SNAD reactor. The photocatalytic Fenton-like reactor disclosed by the invention takes porosity modified TAPB-DMTA COF as a photocatalyst aiming at dyestuff which is difficult to degrade, so that complete degradation of the dyestuff is realized. For ammonia nitrogen pollutants, the bacterial-algae symbiotic SNAD reactor cancels traditional mechanical aeration, the microbial extracellular electron acquisition capability is optimized through a biological enhancer, and efficient and green removal of total nitrogen can be realized without adding an organic carbon source.

The invention relates to the technical field of sewage treatment, in particular to a system for efficiently treating livestock and poultry breeding sewage by utilizing algal-bacterial symbiosis, which comprises a solid-liquid separation module arranged on the ground, the solid-liquid separation module comprises a water inlet pipe, a separation box and a filter basket, a nitrification and denitrification tank is arranged on the top of the ground, and a stirring assembly is arranged in the nitrification and denitrification tank; the chemical phosphorus removal module comprises a coagulation, flocculation and sedimentation tank and a stirring assembly, the coagulation, flocculation and sedimentation tank is arranged on the ground, and the stirring assembly is arranged in a coagulation and flocculation area in the coagulation, flocculation and sedimentation tank; according to the system for efficiently treating the livestock and poultry breeding sewage by utilizing the bacterial-algae symbiosis, compared with an existing method for removing the total nitrogen content in the sewage by independently utilizing microorganisms, pollutants in the sewage are synergistically removed in the oxidation pond by utilizing a bacterial-algae symbiosis structure, microalgae and bacteria, so that the energy consumption and the carbon source are saved, and the environmental pollution is reduced. Meanwhile, the sewage treatment effect is improved.

The present invention discloses a method for cultivating activated sludge for efficiently treating coking wastewater. The present invention adopts bio-fortified strains and rice husk biochar to prepare a microbial immobilization carrier, and the carrier is added to a simulated coking wastewater activated sludge treatment system to form bio-fortified activated sludge, which is successively added to simulated coking wastewater with gradually increasing phenol concentration, simulated coking wastewater with gradually increasing nitrogen-containing heterocyclic compound concentration, and simulated coking wastewater with gradually increasing polycyclic aromatic hydrocarbon concentration for three times of acclimation to obtain activated sludge after the third acclimation, and the activated sludge is applied to treat simulated coking wastewater. The activated sludge after the third acclimation of the present invention can simultaneously and efficiently degrade multiple target pollutants in the simulated coking wastewater.

The invention discloses a double-biological-membrane sewage treatment process for deep nitrogen and phosphorus removal coupled sludge reduction, and belongs to the technical field of sewage treatment. The process is composed of an anoxic biofilm reaction tank, an aerobic biofilm reaction tank and an iron autotrophic denitrification biofilter, and efficient nitrogen and phosphorus removal is performed on sewage through the double-biofilm sewage treatment process. Nitrogen and phosphorus removal and sludge in-situ reduction are mainly carried out in the front-end biological membrane reaction tank, and deep nitrogen and phosphorus removal is mainly carried out in the iron autotrophic denitrification biological filter tank. And the residual sludge is predded by using a protozoon / metazoon food chain of the aerobic biological membrane reaction tank, so that the effect of zero generation of the residual sludge is achieved. The concentration of iron ions is changed by adjusting the reflux ratio of iron-ion-containing reflux liquid generated by the iron autotrophic denitrification biofilter, so that the number and community structures of micro-organisms are effectively controlled, the control on sludge predation is further achieved, and the sludge reduction effect is improved. The process is obvious in effect, can stably operate for a long time and is suitable for engineering application.

The invention discloses a method for strengthening formation and denitrification performance of salt-tolerant aerobic granular sludge in high-salinity wastewater treatment, which comprises the following specific implementation processes: culturing S-AGS by taking activated sludge of a town sewage treatment system and salt-tolerant sludge of an industrial wastewater treatment system as a mixed inoculum, and optimizing the operating conditions of an SBR (sequencing batch reactor); 16SrRNA high-throughput sequencing and co-occurrence network analysis are applied to identify S-AGS core species, a theoretical basis is provided for directional strengthening of structural stability and denitrification performance of the S-AGS core species, screening and expanding culture are performed on core functional strains, Thaura T-1 and PseudofuvimonasP-1 obtained through screening and expanding culture are compounded to prepare a composite functional microbial inoculum, and on the basis of mixed inoculum and reactor conditions, the composite functional microbial inoculum can be used for preparing the high-efficiency denitrification agent for the S-AGS. The composite functional microbial agent is added, so that the synergistic strengthening effect on the denitrification performance of the S-AGS is achieved. According to the method, mixed sludge is inoculated, efficient nitrogen and carbon removal performance is achieved under high salt stress, a core strain is screened and subjected to expanding culture and compounded to serve as a composite functional bacterial agent, and the nitrogen removal efficiency of nitrification / denitrification in the biological treatment process under salt stress can be improved.

The utility model relates to the related technical field of sewage treatment, in particular to a distributed domestic sewage treatment system which comprises a treatment box, and a sewage treatment mechanism is arranged in the treatment box. According to the distributed domestic sewage treatment system, through the arrangement of the sewage treatment mechanism, sewage is firstly collected into the anoxic zone, the sewage is filtered from a grating to remove solid impurities in the sewage and flows down along an inclined plate, and the sewage in the anoxic zone flows into the aerobic zone from an opening in the bottom, so that the biological phosphorus removal effect is achieved; after the water level of the anoxic zone reaches a certain position, the sewage flows into the enhanced treatment zone through a perforated plate, after the sewage flows through an MBBR filler carrier, a biological membrane is formed on the carrier, and organic pollutants in the sewage are degraded while microorganisms massively propagate and grow on the biological membrane, so that the effect of purifying the sewage is achieved; and the water circularly flows through the filler carrier through the water suction pump, and the purified water can be discharged from the water outlet by screwing the water valve.

The invention relates to a preparation method and application of a CeCo / AC catalyst for removing NO by coupling CO and NH3 at a low temperature, and belongs to the technical field of flue gas purification. An A-site doped carrier of the CeCo / AC catalyst is a Co / AC catalyst, A-site doped metal is Ce, the total mass of Co and the A-site doped metal Ce is 2-4% of the mass of the AC carrier, and the molar weight of Co accounts for 20-80% when the total molar weight of Co and the A-site doped metal Ce is 100%. According to the method, Ce is loaded to the Co / AC catalyst to realize A-site doping by adopting surface oxidation pretreatment, an impregnation method, microwave sintering and plasma surface treatment, so that NO is removed by coupling low-temperature CO and NH3, low-temperature activation is realized, and the low-temperature NO removal capability is improved. The catalyst provided by the invention has the characteristics of high NO removal efficiency, environmental protection, no pollution, developed catalyst void structure, good dispersibility of each metal oxide and the like.

The invention discloses acinetobacter baumannii and application thereof.The acinetobacter baumannii is preserved in Guangdong Microbial Culture Collection Center on August 16, 2024, the preservation number is GDMCC No: 65015, the acinetobacter baumannii has a good denitrification effect, and the degradation rate of ammonia nitrogen reaches 94.93%; the degradation rate on nitrate reaches 99.53%; and the degradation rate of nitrite reaches 96.94%. The immobilized microbial agent is further prepared from the bacillus subtilis and pseudomonas aeruginosa with vibrio parahaemolyticus resistance, and the immobilized microbial agent has good effects in the aspects of denitrification and vibrio parahaemolyticus resistance, especially shows better denitrification effect and antibacterial effect in actual culture application, and has good application prospects.

The embodiment of the invention provides a corner tangential coal-fired boiler SCR denitration system and an ammonia injection grid partition control method thereof, and the method comprises the steps that an ammonia injection grid is divided into a plurality of independently-controlled large areas based on the combustion characteristics and flue gas flow characteristics of a coal-fired boiler, and each large area is internally provided with a plurality of ammonia injection grid injection points; a manual valve and an automatic adjusting valve are arranged in each large area, the ammonia spraying amount of a spraying point of a single ammonia spraying grid is adjusted through the manual valve, and the total ammonia spraying amount of the whole large area is dynamically adjusted through the automatic adjusting valve; and the NOx concentration and the ammonia escape concentration corresponding to each large area are monitored in real time, and the ammonia spraying amount of each large area is dynamically optimized through a control algorithm based on the boiler operation load change, so that the ammonia spraying distribution of each large area is matched with the NOx concentration distribution.

The invention discloses application of an anaerobic baffle plate-microbial electrolysis-constructed wetland coupling process in the aspect of rural domestic sewage treatment. The principle is based on a novel volatile fatty acid (VFAs) comprehensive utilization technology. The anaerobic baffle plate-microbial electrolysis-constructed wetland coupling process is mainly composed of a four-compartment anaerobic baffle plate reactor and a multi-section multi-stage microbial electrolysis and horizontal subsurface flow type constructed wetland coupling reactor, and the specific working process is as follows: (1) rural domestic sewage is used as inlet water, firstly enters the anaerobic baffle plate reactor and then enters the horizontal subsurface flow type constructed wetland coupling reactor; carrying out anaerobic hydrolysis to produce VFAs and gas production reaction; (2) starting a microbial electrolysis-constructed wetland coupling reactor; and (3) respectively introducing effluent and produced gas of the anaerobic baffled reactor into a microbial electrolysis-constructed wetland coupling reactor, integrally regulating and controlling the structure and activity of a microbial community, efficiently degrading VFAs into CO2 and CH4, and simultaneously removing nitrogen and phosphorus pollutants, thereby realizing the recycling of sewage treatment.

The application discloses a kind of salt-tolerant heterotrophic nitrification-aerobic denitrification composite microbial inoculant, which is compounded by seed liquid of halomonas sp LJK13, halomonas campaniensis LJK10 and halomonas alkaliphila LJK2, and the volume ratio of the seed liquid of halomonas sp LJK13, halomonas campaniensis LJK10 and halomonas alkaliphila LJK2 is 2-3:1-2:1-2.The composite microbial inoculant adapts to a wide range of environmental conditions, and when C / N is 20-200, salinity is 1%-30%, initial NH4 + -N and NO3 ‑ -N concentration is 50mg / L-1000mg / L, the denitrification removal rate of heterotrophic nitrification-aerobic denitrification composite bacteria is 28.0%-100%, which shows that the salt-tolerant heterotrophic nitrification-aerobic denitrification composite microbial inoculant has good comprehensive denitrification performance for seawater aquaculture wastewater, and has a wide range of environmental applications.

The invention discloses a salt-tolerant efficient denitrification strain and application thereof, and belongs to the technical field of microorganisms. The invention provides a salt-tolerant high-efficiency denitrification (Brucella anthropi N2-2) strain, and the preservation number of the strain is CCTCC (China Center for Type Culture Collection) NO: M 20241934. The salt-tolerant efficient denitrification strain (Brucella anthropi N2-2) provided by the invention has the best denitrification effect when the salinity is 0-3 wt%, the inoculum size is 2% (v / v) and the pH value is 7.5-8.5. According to the present invention, the thallus preparation containing the strain (Brucella anthropi N2-2) is put into the culture pond, such that the contents of ammonia nitrogen, nitrite nitrogen, organic nitrogen and nitrate in the water body can be effectively reduced, the pH value of the water body can be regulated to the normal range so as to maintain the relative stability of the culture water body;

The invention relates to the field of microbial technology, and discloses a strain with low-temperature resistance and aerobic denitrification function and an application thereof. The strain is named Pseudomonas sp. BWFA71, and the preservation unit is Guangdong Microbial Culture Collection Center (GDMCC), the preservation date is February 22, 2022, and the preservation number is GDMCCNO:62257. The strain of the invention has strong applicability and a wide range of temperature tolerance. The maximum and minimum tolerance temperatures are both wider than those of the same genus strains in the prior art. The strain can have good denitrification ability under conditions of 6 to 30°C, and the dissolved oxygen in the water has no obvious effect on its denitrification process. The strain is particularly suitable for sewage treatment and denitrification systems in areas with relatively large temperature changes, and for total nitrogen control in ecological restoration projects such as aquaculture water bodies and landscape water bodies where anaerobic denitrification cannot be performed.

The invention discloses a high-temperature dust removal and denitration integrated device, and relates to the technical field of environmental protection equipment, the high-temperature dust removal and denitration integrated device comprises a smoke dust treatment assembly, a denitration assembly is arranged at one end of the smoke dust treatment assembly, a conveying pipeline is arranged at the other end of the denitration assembly, and an ammonia spraying grid is arranged on one side of the conveying pipeline; a plurality of transmission assemblies are arranged on the surface wall of the denitration assembly, corresponding maintenance doors are arranged on the sides, perpendicular to the transmission assemblies, of the denitration assembly, the transmission assemblies are provided with protection assemblies located in the denitration assembly, storage assemblies are arranged at the bottom ends of the protection assemblies, and limiting assemblies are arranged on the sides, located on the storage assemblies, of the protection assemblies. Relates to the technical field of environmental protection equipment, through cooperative work of a unique transmission assembly, a protection assembly, a storage assembly and a limiting assembly, the catalyst replacement process becomes simple, convenient and rapid, complex shutdown and restart operation is not needed, the replacement time is greatly shortened, the influence on production is reduced, and the catalyst replacement efficiency is greatly improved.

The present application belongs to the technical field of sewage treatment, and discloses a continuous flow aerobic granular sludge treatment device, which includes a pool A, a pool O, an aerobic granular sludge generating mechanism, a clear liquid discharge component and a reflux component, wherein the pool A constitutes an anaerobic pool, the pool O constitutes an aerobic pool, the pool O is arranged outside the pool A and extends along the circumference of the pool A, the bottom of the pool O is connected to the bottom of the pool A, the aerobic granular sludge generating mechanism is arranged inside the pool O and located at the outer edge of the pool O, a water inlet is arranged on the upper part of the aerobic granular sludge generating mechanism, the clear liquid discharge component has a water inlet end located inside the aerobic granular sludge generating mechanism and a drainage end extending to the outside of the pool O, the water inlet end is located above the water inlet, and the reflux component includes a first reflux pipe located in the pool O and connected to the aerobic granular sludge generating mechanism, and a second reflux pipe connected to the aerobic granular sludge generating mechanism and extending to the pool A.

The invention relates to the technical field of microorganisms, in particular to acinetobacter YYL-1 and application, and the preservation number of the acinetobacter YYL-1 is CGMCC (China General Microbiological Culture Collection Center) No.28247. The acinetobacter YYL-1 has heterotrophic nitrification-aerobic denitrification one-stop denitrification performance, can realize high-efficiency removal of ammonia nitrogen by a single bacterium in a medium and low temperature environment, especially can realize effective colonization in activated sludge, and enhances the denitrification performance of the activated sludge in a low temperature environment.

The present invention relates to an enhanced operation method of a full-process autotrophic denitrification process, and belongs to the technical field of biological treatment of nitrogen-containing wastewater. The present invention starts the full-process autotrophic denitrification process by setting a sludge internal reflow system on a membrane bioreactor, applying an electromagnetic field generating system on the internal reflow pipeline, and gradually increasing the ammonia nitrogen concentration of the influent. By regulating the magnetic field intensity and application cycle, the reflux ratio in the mixed liquid, and the dissolved oxygen concentration, the growth rate and activity of aerobic ammonia oxidizing bacteria and anaerobic ammonia oxidizing bacteria are promoted, so that the two can coexist harmoniously and efficiently, and the rapid start-up of the full-process autotrophic denitrification process is achieved, and the process operation stability is enhanced. The method to which the present invention belongs has a simple process and mild reaction conditions, and can improve the denitrification effect of the process under medium and low temperature conditions; the internal reflow of muddy water and the higher reflux ratio are conducive to the full mixing of activated sludge and sewage in the reactor, reducing the stirring power demand, reducing the reactor operation cost, and more easily forming granular sludge; the reactor is not limited by the size of the permanent magnet, has no magnetic field attenuation problem, can adjust the magnetic field intensity at any time, has a wider range of application, can be modified on the basis of the existing reactor, and is convenient for engineering application.

The application provides a method and device for treating wastewater by combining a suspended filler floating bed and a soil infiltration system, and the method comprises the following steps: S1, breeding wastewater is treated by the suspended filler floating bed after passing through a hydrolysis tank, and effluent is treated in a sedimentation tank, and wastewater of the suspended filler floating bed is returned to the suspended filler floating bed for secondary treatment; S2, wastewater of the sedimentation tank is returned to the hydrolysis tank; and S3, effluent of the sedimentation tank is introduced into a soil underground infiltration system. The system provided by the application is beneficial to further strengthening the effects of denitrification, phosphorus removal and removal of suspended solids, and solves the problems of low dissolved oxygen content of influent and wastewater in the system, which is not conducive to the growth of nitrifying bacteria, and low effective volume utilization rate. In the use process, the filler does not need to be replaced, and mechanical aeration equipment does not need to be added, and the system has the advantages of low investment cost, no need to add chemical agents for treatment, obvious effect, not easy to breed mosquitoes, simple operation and management, and beautification of the environment, and has remarkable ecological and economic benefits for promoting deep purification of breeding wastewater.

This utility model discloses a system for combined denitrification under full-load conditions in a circulating fluidized bed boiler, comprising a wide-temperature-range SNCR denitrification module and a flue gas circulation module. The injectors in the wide-temperature-range SNCR denitrification module are arranged in the inlet flue of the high-temperature separator, the inlet flue of the high-temperature superheater, or the boiler furnace. The flue gas circulation module includes a flue gas circulation header and flue gas circulation branch pipes arranged along the flue gas flow direction. The flue gas circulation header connects to the flue gas circulation branch pipes, which are connected to the air preheater via a primary air fan. The inlet of the flue gas circulation header connects to the outlet of the induced draft fan. This utility model extends the lower limit of the conventional 800~1050℃ temperature window to 650℃. It uses ethanol as a low-temperature additive, resulting in relatively low denitrification costs and convenient ethanol addition and removal. Compared with existing SCR denitrification technology, the system is simpler and more economical. It does not require boiler modification, nor does it require additional denitrification reactors and catalysts, making the system relatively simple and facilitating switching between low-temperature denitrification mode and conventional denitrification mode.