75 results about "Carbon nitrogen" patented technology

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.

The invention discloses a farmland carbon and nitrogen cycle adjusting system based on an ecological model and an implementation method of the farmland carbon and nitrogen cycle adjusting system, and relates to the technical field of ecological adjustment. The system comprises a farmland information database, a visual circulating system and an adjusting system. The farmland information database comprises fertilization amount, climate conditions, soil characteristics and farmland management; the visual circulating system is used for simulating element migration among soil, plants and atmosphere, emission of greenhouse gases, organic matter analysis, CO2 generated by root respiration and dynamic behaviors of a soil carbon library and a nitrogen library; the system comprises a carbon nitrogen cycle adjustment analyzer and an early warning module. Soil data is collected in real time and imported into the mixed neural network model for carbon nitrogen cycle adjustment analysis, the optimal fertilizer usage amount and irrigation amount of the corresponding soil are calculated, the adjustment scheme is generated according to the analysis result, and the accuracy and efficiency of ecological system carbon nitrogen cycle monitoring are improved.

The invention relates to the field of agricultural data analysis, in particular to a plough layer capacity expansion regulation and control method fused with an organic material carbon nitrogen conversion model, and the method comprises the steps: obtaining carbon nitrogen mineralization rate time sequence original data; performing coupling evaluation on mineralization energy gravity center moment difference and morphological overlapping characteristics to obtain a phase hysteresis correction factor; performing normalized attenuation mapping on the sequence local oscillation energy functional and the total sample average oscillation energy to obtain a transient excitation smoothing factor; performing optimization factor multiplicative correction on the Euclidean distance to obtain a corrected distance and performing clustering iterative calculation; and performing carbon nitrogen conversion model parameter matching and regulation strategy reverse derivation on a clustering result to obtain a plough layer capacity expansion regulation scheme so as to solve the problems of regulation type region division distortion and model matching precision reduction caused by inoculation hysteresis translation and excitation effect high-frequency oscillation in the existing Euclidean distance-based mineralization rate time sequence clustering.

The invention provides a high-ammonia-nitrogen low-carbon-nitrogen-ratio wastewater treatment system and method, and relates to the technical field of wastewater treatment.The treatment system comprises an aeration sedimentation tank set, a first-stage denitrification reactor, a water tank, a second-stage denitrification reactor and a nitrification tank which are sequentially arranged in the wastewater treatment direction; the aeration sedimentation tank group is used for removing organic matters and suspended matters in the sewage, reducing the concentration of metal ions and adjusting the pH value of the sewage; the primary denitrification reactor is communicated with the aeration sedimentation tank group and is used for carrying out short-cut nitrification reaction and anaerobic ammonia oxidation reaction; the top of the water tank is communicated with the primary denitrification reactor, and the bottom of the water tank is communicated with the secondary denitrification reactor through a first pipeline; the second-stage denitrification reactor is used for carrying out denitrification reaction coupling short-cut denitrification reaction and anaerobic ammonia oxidation reaction, and the second-stage denitrification reactor is provided with a first water outlet communicated with the first pipeline and a second water outlet communicated with the nitrification tank. The treatment system can ensure that high-ammonia-nitrogen low-carbon-nitrogen-ratio wastewater treatment reaches the nanotube standard.

The invention discloses a method for promoting degradation and humification of sludge compost organic matters, and belongs to the technical field of sludge treatment. The method comprises the following steps: mixing sludge and straws to obtain a compost raw material, adjusting the carbon nitrogen ratio by utilizing the straws and improving the bulkiness of the compost raw material, adding phosphate and steel slag into the compost raw material, and uniformly mixing to obtain compost; and fermenting the compost until the compost is thoroughly decomposed to obtain the organic fertilizer. The phosphate and the steel slag are selected as a combined additive, the phosphate is used for reducing compost nitrogen loss and improving compost nutrients, meanwhile, the steel slag is further used for regulating and controlling pH and NH4 < + > conversion in the composting process, degradation and humification of compost organic matter are synergistically promoted, and the quality of a final compost product is improved. The cost is low, the operation method is simple, the effects of improving the composting efficiency and quality and degrading and converting organic matters are obvious, the decomposition degree of a compost product is improved, and the humic acid and humification degree in the compost after fermentation are increased.

The invention belongs to the technical field of urban sewage treatment, and particularly discloses a method for promoting short-cut nitrification formation of urban sewage, which is characterized in that a sequencing batch activated sludge reactor (SBR) with different carbon nitrogen ratio gradients is operated, and the initial ammonia nitrogen concentration is 25 mg / L. Based on the principle that the adaptability of ammonia-oxidizing bacteria is stronger than that of nitrite-oxidizing bacteria, the carbon-nitrogen metabolic pathway of denitrifying flora and the mutual competition relationship among the flora are adjusted through different carbon-nitrogen ratio conditions, the biological activity of the nitrite-oxidizing bacteria is inhibited, and the purpose of forming short-cut nitrification by a system with a relatively high carbon-nitrogen ratio is achieved. And the method inhibits nitrite oxidizing bacteria on the community structure, the formed inhibition effect is more stable compared with operation parameter regulation, and a new regulation strategy is provided for low-carbon-nitrogen-ratio urban sewage treatment.

The utility model provides a treatment system for wastewater with high ammonia nitrogen and low carbon nitrogen ratio, which relates to the technical field of wastewater treatment and comprises an aeration sedimentation tank group, a primary denitrification reactor, a water tank, a secondary denitrification reactor and a nitrification tank which are sequentially arranged along the wastewater treatment direction, the aeration sedimentation tank group is used for removing organic matters and suspended matters in the sewage, reducing the concentration of metal ions and adjusting the pH value of the sewage; the primary denitrification reactor is communicated with the aeration sedimentation tank group and is used for carrying out short-cut nitrification reaction and anaerobic ammonia oxidation reaction; the top of the water tank is communicated with the primary denitrification reactor, and the bottom of the water tank is communicated with the secondary denitrification reactor through a first pipeline; the second-stage denitrification reactor is used for carrying out denitrification reaction coupling short-cut denitrification reaction and anaerobic ammonia oxidation reaction, and the second-stage denitrification reactor is provided with a first water outlet communicated with the first pipeline and a second water outlet communicated with the nitrification tank. The treatment system can ensure that high-ammonia-nitrogen low-carbon-nitrogen-ratio wastewater treatment reaches the nanotube standard.

The invention relates to the technical field of agricultural fertilizers, and discloses an environment-friendly organic slow-release fertilizer and a preparation method thereof, the environment-friendly organic slow-release fertilizer comprises the following raw materials by mass: 55-65% of a decomposed straw carrier; 20%-30% of a slow release carrier; 8%-12% of a microencapsulated bacterial agent; 3%-5% of a cross-linking agent; and 2%-4% of an auxiliary additive. The porosity of the decomposed straw carrier is larger than or equal to 65%, the carbon nitrogen ratio is (25-28): 1, the particle size is 0.5-1.5 mm, and the water holding capacity is larger than or equal to 2.5 g / g. The environment-responsive supramolecular slow-release system is constructed, supramolecular host-guest interaction and temperature-responsive polymer synergism are utilized, the fertilizer release rate can be dynamically regulated and controlled along with the crop rhizosphere temperature, nitrogen can be accurately released in the crop fertilizer demand peak period, the matching degree of a nitrogen release curve and crop demand is increased to 90% or above, and the nitrogen release rate is increased to 90% or above. Compared with the traditional organic fertilizer with the problems of uncontrolled nutrient release, excessive nutrient loss in the early stage and insufficient supply in the later stage, the fertilizer realizes the high conformity of nutrient release and crop requirements.

The invention relates to the technical field of sewage treatment, and particularly discloses a lateral flow sewage treatment system and method with a self-adaptive carbon-nitrogen ratio. The system comprises a mainstream reactor, a sidestream reactor, a monitoring unit, an intelligent control unit, a reflux path switching device and a microbial agent targeted adding system. The method comprises the following steps: monitoring inlet water C / N in real time, and intelligently switching an operation mode, parameters, a microbial agent adding strategy and an outlet water backflow path of ASSR: when the C / N is low, starting a recessive growth mode, returning the outlet water to an anaerobic zone, and preferentially supplementing carbon and synergistically reducing through a'cracking-recessive growth 'mechanism; when C / N is high, a metabolism remodeling mode is started, effluent returns to the aerobic front end, and fundamental reduction and enhanced nitrogen and phosphorus removal are achieved through an energy decoupling mechanism. By means of mode-parameter-fungicide-path linkage control, the problem of mismatching of ASSR process mechanism and water quality is solved, and optimal distribution of carbon flow / electron flow and efficient sludge reduction are achieved.

The invention discloses a device and a method for treating high-nitrogen low-carbon wastewater by coupling iron-based porous combined filler with biological enhancement. The device comprises a sewage tank, a biochemical reaction device and a sludge controllable screening type sedimentation tank which are communicated in sequence, wherein the biochemical reaction device is divided into a front anoxic zone, an aerobic zone, a micro-aerobic zone and a rear anoxic zone according to the water flow direction; iron-based porous combined fillers are placed in the front anoxic zone and the rear anoxic zone, and porous fillers are placed in the aerobic zone and the micro-aerobic zone; the sludge controllable screening type sedimentation tank is provided with a partition plate, the front end area of the partition plate is a first screening area which is communicated with the front anoxic area, and the rear end area of the partition plate is a second screening area which is communicated with a sludge discharge pipe and a water outlet pipe. According to the present invention, the carbon source requirement can be substantially saved in the treatment of high ammonia nitrogen and low carbon nitrogen ratio sewage, the excess sludge yield is reduced, the sludge sedimentation performance is improved, and the effluent quality is improved.

The invention provides a carbon sink potential prediction method and device fusing remote sensing and model technologies. The remote sensing and model technology fused carbon sink potential prediction method comprises the steps of inputting multi-temporal remote sensing data into a vegetation type identification model created based on historical remote sensing data and historical vegetation type labels to obtain vegetation structure dynamic distribution data; inputting the vegetation structure dynamic distribution data into a regional carbon and nitrogen cycle model created based on historical crop distribution data and vegetation and soil dynamic data to obtain a regional carbon and nitrogen cycle dynamic simulation result; and determining carbon sink data according to the regional carbon nitrogen cycle dynamic simulation result. According to the method, the bottlenecks of insufficient current regional scale carbon accounting data and high uncertainty can be broken through, and carbon sink maximization is realized.

The invention discloses a device and a method for low-carbon nitrogen and phosphorus removal of town sewage, which are mainly used for town sewage treatment, a continuous flow segmented water inlet three-section anoxic and aerobic alternating process is utilized, precipitated sludge enters a cyclone separator to be separated into heavy sludge and light sludge, the heavy sludge flows back to enter the first two sections of aerobic zones of a biochemical pool, and the light sludge flows back to the second two sections of aerobic zones of the biochemical pool. Part of the light sludge flows back into a first-section anoxic zone of the biochemical pool, and the residual light sludge is discharged as residual sludge; microorganisms in the light sludge store an internal carbon source in the anoxic zone and generate a large amount of extracellular polymeric substances, the polymeric substances promote the activated sludge to form granular sludge in the aerobic zone, and nitrification, endogenous short-cut denitrification-anaerobic ammonia oxidation nitrogen removal and phosphorus uptake are realized in the aerobic zone. According to the invention, low-carbon nitrogen and phosphorus removal of town sewage can be realized, the town sewage treatment efficiency can be effectively improved, the use of an external carbon source for sewage treatment is reduced, and the sewage treatment cost is reduced.

The invention discloses a humic acid type straw source microbial agent which comprises the following strains: enterococcus faecium, bacillus subtilis, lactobacillus plantarum and saccharomyces cerevisiae. The method has the advantages that turfy soil, biogas residues, biogas slurry and a certain amount of agricultural waste are added into compost with straw microbial agents and livestock and poultry manure as main materials to adjust a proper carbon nitrogen ratio, and more importantly, a compound microbial agent for strengthening the process of the humic acid type straw source microbial agent is inoculated; compared with natural composting fermentation, the composting efficiency and stability are improved, and the fertilizer efficiency and fertility of the organic fertilizer and the resource utilization efficiency of waste are improved.

The invention relates to the technical field of biological sewage treatment, in particular to a method for realizing heterotrophic nitrification-aerobic denitrification nitrogen removal of wastewater with a low carbon nitrogen ratio. According to the method for realizing heterotrophic nitrification-aerobic denitrification nitrogen removal of the wastewater with the low carbon-nitrogen ratio, an exogenous magnetic field is introduced into a slow-release carbon source system, so that the central magnetic field intensity of an aeration tank is 10-40mT, and the metabolic activity of cellulose degrading bacteria in the system is enhanced and the degradation process of cellulose is promoted by utilizing a magnetic biological effect excited by the magnetic field; the carbon source release efficiency is improved, and the problem of limited carbon release amount of the slow-release carbon source is solved. The enhanced carbon release process effectively increases the carbon nitrogen ratio, provides sufficient organic carbon sources and electron donors for heterotrophic nitrification-aerobic denitrification bacteria, makes the heterotrophic nitrification-aerobic denitrification bacteria have advantages in competition with autotrophic bacteria, further enhances the dominant position of heterotrophic nitrification-aerobic denitrification in the denitrification process without changing other operating parameters, realizes efficient denitrification, and improves the denitrification efficiency. Cost is low, operation is simple, and effect is remarkable.

The invention discloses a method for treating aged landfill leachate by ozonation and short-cut denitrification-anaerobic ammonia oxidation, which comprises the following steps: treating the aged landfill leachate by an ozonation unit, and then treating the aged landfill leachate by a short-cut denitrification-anaerobic ammonia oxidation (PDA) biological treatment unit, so that the aged landfill leachate can be discharged after reaching the standard. The ozone oxidation unit is used for continuously and efficiently cracking macromolecular refractory organic matters such as humic acid in the aged leachate through ozone, so that the biodegradability is remarkably improved; and the nitrogen proportion is synchronously optimized to form an ideal PDA flora substrate. According to the PDA biological treatment unit, mixed sludge of anaerobic ammonia oxidation sludge and denitrifying bacteria sludge is inoculated in a UASB reactor, and after gradual domestication, short-cut denitrification activity in a PDA biological treatment system is remarkably higher than nitrite reduction activity, and continuous supply of nitrite is guaranteed; synergistic metabolism of anaerobic ammonium oxidation bacteria and denitrifying bacteria is achieved, and the problem of organic matter inhibition is solved. The process and the device provided by the invention provide a green and efficient innovative solution for degradation-resistant wastewater with high ammonia nitrogen and low carbon nitrogen ratio.

The invention relates to the field of high-nitrogen wastewater treatment, and discloses an anaerobic ammonia oxidation treatment system and method based on high-nitrogen wastewater. The treatment system comprises an anaerobic module, a first-stage AO module, an anaerobic ammonia oxidation module and a second-stage AO module, wherein high-nitrogen wastewater sequentially passes through the anaerobic module, the first-stage AO module, the anaerobic ammonia oxidation module and the second-stage AO module; the anaerobic module adopts a three-phase separator to realize gas, solid and liquid separation; high-nitrogen wastewater enters the anaerobic module, supernate is discharged by a three-phase separator, and the supernate is subjected to water quality analysis to determine that the supernate enters the primary AO module or the secondary AO module, so that the water quality of inlet water of the anaerobic ammonia oxidation module is stable. The carbon nitrogen ratio of the supernatant discharged by the anaerobic module is analyzed to determine that the supernatant flows to the first-stage AO module or the second-stage AO module so as to adapt to different water quality conditions and optimize the treatment effect.

The invention discloses a denitrification biological membrane based on biological enhancement of electroactive bacteria as well as a construction method and application of the denitrification biological membrane. The construction method comprises the following steps: constructing a double-chamber bioelectrochemical reactor; introducing an activated sludge mixed solution as a basic inoculum into the working electrode chamber, and simultaneously adding an electroactive bacteria solution in a logarithmic phase for biological enhancement; the reactor after inoculation is connected to an external circuit to form a closed circuit state, constant voltage or current is applied, and biofilm culturing is carried out in a sequencing batch operation mode; through periodical water changing and carbon source supplying, the synergistic effect of electrical stimulation and electroactive bacteria is utilized, and microbial communities are driven to take electroactive bacteria as a main director and denitrifying bacteria as a main director until a biological membrane is mature and stable and efficient denitrification is realized. According to the method, the starting period of the reactor can be remarkably shortened, nitrate can be efficiently removed under the condition of low carbon nitrogen ratio, nitrite accumulation is effectively reduced, and the method has the advantages of being high in starting speed, high in denitrification efficiency and high in operation stability.

The invention relates to the technical field of livestock and poultry breeding, and discloses a livestock and poultry breeding carbon nitrogen collaborative reduction control and recycling system, which comprises a whole-chain data sensing module, a data driving prediction module and a dynamic adjustment adaptation module, and is characterized in that the whole-chain data sensing module is used for deploying an intelligent sensor by adopting a wireless sensing node in a livestock and poultry breeding area; the method comprises the following steps: monitoring the whole chain, acquiring whole chain monitoring data, predicting carbon nitrogen emission, a resource value coefficient and a carbon nitrogen emission reduction capability index based on the whole chain monitoring data through a data driving prediction module, and outputting a dynamic optimization adjustment scheme based on a prediction result of the data driving prediction module through a dynamic adjustment adaptation module. According to the system, a full-chain solution scheme from data support to quantitative evaluation to precise regulation and control is constructed, the goal of carbon and nitrogen collaborative reduction and control is achieved, the manure resource utilization efficiency is improved, the pressure of agricultural non-point source pollution and environmental compliance is relieved, and the breeding system is promoted to be transformed to the green sustainable direction.

The invention relates to a method for inactivating viruses in sewage. The method comprises the following steps: introducing heterotrophic bacteria into sewage to be inactivated; the carbon-nitrogen ratio of the sewage is increased in the process of activating and expanding the heterotrophic bacteria; washing and resuspending the activated and propagated heterotrophic bacteria to form a standby heterotrophic bacteria solution; the heterotrophic bacteria liquid is inoculated into the sewage, and the carbon nitrogen ratio of the sewage is reduced, so that the heterotrophic bacteria generate oxidative stress reaction to inactivate viruses. According to the method, the carbon nitrogen ratio is regulated and controlled, so that the heterotrophic bacteria are converted from a eutrophication environment to a hypotrophic environment, an oxidative stress pathway of the heterotrophic bacteria is activated, generation of oxidative active species such as superoxide radicals is increased, oxidative damage to virus shells or envelopes is caused, and virus inactivation is promoted. The method is simple and efficient, and has a wide application scene.

The invention discloses an aerobic granular sludge treatment device for efficient nitrogen and phosphorus removal of sewage with a low carbon-nitrogen ratio. The aerobic granular sludge treatment device comprises a reaction zone; the sludge hydrolysis area and the reaction area share the pool wall and are arranged in parallel; the water inlet main pipe is communicated with the reaction area and is used for supplying sewage into the reaction area; two ends of the return pipe are respectively communicated with the sludge hydrolysis area and the water inlet main pipe, and the return pipe is used for feeding sludge in the sludge hydrolysis area into the water inlet main pipe, and the sludge enters the reaction area along with sewage; two ends of the sludge conveying pipe are respectively communicated with the bottoms of the sludge hydrolysis area and the reaction area, and the sludge conveying pipe is used for conveying sludge at the bottom of the reaction area into the sludge hydrolysis area. The invention has the following beneficial effects: rapid formation of aerobic granular sludge can be realized, and sewage treatment and sludge anaerobic hydrolysis fermentation can be synchronously realized through spatial configuration combination of the tank body; volatile fatty acid generated by sludge hydrolysis and fermentation can improve the concentration of biodegradable organic matters in the reaction device, so that the nitrogen and phosphorus removal efficiency of biological treatment is improved, and meanwhile, the yield of residual sludge is reduced.

The utility model discloses a sewage treatment device with low carbon-nitrogen ratio, which relates to the technical field of sewage treatment and mainly comprises an electric flocculation reaction tank, an MABR reaction tank, a sedimentation tank, a direct-current power supply system and a gas supply system, the electric flocculation reaction tank is used for removing soluble, colloidal and suspended pollutants in water under the actions of coagulation, oxidation and air floatation; an MABR reactor is adopted, the dissolved oxygen concentration is controlled, and one-stage nitrosation-anaerobic ammonia oxidation is started and continuously operated in an intermittent aeration mode. By constructing a pure biological membrane MABR system, the PN / A quick start is realized, and the denitrification capacity is gradually improved. The device has the advantages of simple structure, easiness in operation, small sludge amount, good sewage treatment effect and the like.

The invention relates to the technical field of organic waste resource utilization, in particular to a method for preparing an organic fertilizer by cooperatively regulating and controlling the carbon nitrogen ratio of garden waste and kitchen waste. S2, feed-forward regulation and control; s3, online detection of the mixed material; s4, feedback regulation and control; and S5, performing quality judgment and post-processing. A double-closed-loop control strategy combining feed-forward regulation and feedback regulation is adopted, and the feed-forward regulation calculates a theoretical ratio in advance according to the carbon-nitrogen ratio of the raw material to quickly respond to the composition change of the raw material; feedback regulation and control dynamically corrects the feeding rate according to the actually measured carbon-nitrogen ratio of the mixed material, residual deviation of feedforward regulation and control is eliminated, and accurate control over the carbon-nitrogen ratio is achieved through the synergistic effect of the two.

The invention discloses a method and a system for directionally producing short-chain fatty acid based on synergistic fermentation of kitchen waste and municipal sludge. The method comprises the following steps: carrying out gradient high-temperature pyrohydrolysis on sludge, and carrying out deoiling and enzymolysis on kitchen waste; the pretreated materials are mixed according to the volatile solid content of (5: 1)-(1: 10), the carbon nitrogen ratio is controlled to be 20-30, and biochar generated by fermentation residues in the system is added; carrying out two-stage anaerobic fermentation of alkaline (pH 9.0-10.0) and acidic (pH 5.0-6.0) at first; and acidifying the fermentation liquor, and carrying out gas stripping concentration to obtain a high-concentration short-chain fatty acid solution. According to the method, through four-dimensional cooperation of differential pretreatment, proportion optimization, endogenous conductive material and process dynamic regulation and control, the technical bottlenecks that the substrate hydrolysis rate is not matched and the product selectivity is poor are solved, the high yield (25-30 g COD / L) of short-chain fatty acid and the high selectivity (larger than or equal to 55%) of butyric acid are achieved, and meanwhile low-cost operation is achieved through material internal circulation.

The invention discloses pyrite-activated carbon composite constructed wetland filler based on agricultural wastes as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The filler is of a three-layer composite structure, the bottom layer is a nano pyrite loaded hydrothermal carbon skeleton, the middle layer is a Fe3O4 modified activated carbon-pyrite complex, and the surface layer is a biochar regulation and control filter layer. According to the composite layer structure, agricultural waste is subjected to hydrothermal carbonization to form a porous framework, and then nano pyrite is loaded in situ to prepare a bottom layer; activating KOH to prepare microporous activated carbon and loading Fe3O4 to prepare a middle layer; agricultural waste pyrolysis steam is used as a carbon source, and a surface layer is prepared through chemical vapor deposition. The filler realizes nitrogen and phosphorus removal, heavy metal adsorption and stink inhibition through a multi-component synergistic effect of a three-layer structure, and the porosity is gt; the filler blockage is effectively relieved by 60%, and the filler is suitable for being used as a constructed wetland filler for treating low-carbon-nitrogen-ratio wastewater and heavy metal and nano plastic polluted wastewater.

The application discloses a kind of water carbon nitrogen combined management and yield prediction method of rice-wheat rotation high-efficiency production, including water management, exogenous carbon input, exogenous nitrogen input, water carbon nitrogen combined management system and crop yield prediction method.Water management uses rice low water level dry-wet alternate irrigation and wheat precision quantitative irrigation.Exogenous carbon input and exogenous nitrogen input use self-made straw wet biochar and quick-acting and slow-release urea nitrogen are proportioned and applied.Water carbon nitrogen combined management system is four kinds of water carbon nitrogen application schemes obtained by Meta analysis.Crop yield prediction model based on water carbon nitrogen combined management is multiple linear equation fitting.Rice-wheat system yield prediction model and four kinds of water carbon nitrogen application schemes established by the application can accurately predict yield and optimize management parameters.The application can realize rice-wheat rotation high-efficiency production, reduce nitrogen, save water and increase yield, and has significant economic and environmental benefits.

The invention belongs to the technical field of chemical wastewater treatment, and particularly relates to a process for treating adipic acid wastewater, which comprises the following steps: pretreatment: pretreating adipic acid wastewater and phenol-acetone wastewater, adjusting the pH value to neutral acidity, and removing suspended solids and other large-particle pollutants in the adipic acid wastewater and the phenol-acetone wastewater; the phenol-acetone wastewater and the adipic acid wastewater are mixed to form mixed wastewater, and the carbon nitrogen ratio of phenol-acetone to adipic acid in the mixed wastewater is (3-5): 1; denitrification reaction: introducing the mixed wastewater into a denitrification reactor, controlling the reaction temperature to be 25-35 DEG C, the reaction time to be 1-6 hours and the pH value to be 7-7.5, and carrying out denitrification reaction; and effluent treatment: after the reaction is completed, introducing the effluent into a sedimentation tank for solid-liquid separation to obtain purified effluent. After the phenol-acetone wastewater is used as a denitrification carbon source, the metabolic efficiency of denitrifying microorganisms is enhanced by multi-element organic matters, and the removal rate of nitrate radicals is increased. Meanwhile, the risk of secondary pollution of phenol and acetone is reduced.

The present application relates to sewage treatment technical field, specifically disclose a kind of carbon nitrogen ratio self-adaptive side stream sewage treatment system and method.System includes main stream reactor, side stream reactor, monitoring unit, intelligent control unit, reflux path switching device and inoculant targeted dosing system.Through real-time monitoring of influent C / N, intelligently switch the operation mode, parameter, inoculant dosing strategy and effluent reflux path of ASSR: low C / N, start latent growth mode, effluent back anaerobic zone, through "cracking-latent growth" mechanism preferentially carbon supplement and synergistic reduction;High C / N, start metabolic remodeling mode, effluent back aerobic front end, through "energy decoupling" mechanism to realize fundamental reduction and strengthen denitrification and phosphorus removal.The present application is through "mode-parameter-inoculant-path" linkage control, solve ASSR process mechanism and water quality mismatch problem, realize carbon flow / electron flow optimal distribution and sludge efficient reduction.

The invention relates to the technical field of sewage denitrification, in particular to a deep denitrification process for wastewater with a low carbon-nitrogen ratio. The process comprises the following steps: constructing an MBBR-SADN reaction system, preparing a functional carrier, directionally enriching denitrifying flora, optimizing operating parameters and carrying out gradient domestication on actual wastewater. Through a three-in-one technical path of functional carrier modification-flora directional regulation and control-process parameter collaborative optimization, SOB enrichment and EPS secretion are promoted by a modified carrier, so that biofilm formation is accelerated, the biofilm formation period is remarkably shortened, effluent TN is stably controlled to be 4 mg / L or below, and the denitrification efficiency reaches 99.4% or above; engineering verification has been carried out for low-carbon-nitrogen-ratio wastewater (C / N = 1.4-3), and the TN stability of effluent is lower than 3.8 mg / L during continuous operation for 90 days, which indicates that the denitrification process has good stability and adaptability in practical application, and has good application prospects. A solution is provided for solving the key problems of long biofilm culturing period, low denitrification efficiency, poor impact resistance and the like in the current sulfur autotrophic denitrification technology.

The utility model discloses culture tail water treatment equipment capable of synergistically reducing carbon, nitrogen and phosphorus and new pollutants, which belongs to the technical field of culture tail water treatment and comprises a biochemical pool body, a guide cylinder is mounted at the inner end of the biochemical pool body, and the guide cylinder is mounted in the biochemical pool body. An anaerobic cylinder is mounted on the inner wall of the guide cylinder, one side of the biochemical pool body is communicated with a sewage advanced oxidation pool body, an anaerobic zone is arranged in the anaerobic cylinder, and a mud-water mixed liquid medium between the anaerobic cylinder and the guide cylinder is naturally layered. According to the device, carbon, nitrogen, phosphorus and new pollutants in the breeding tail water can be synergistically reduced in the treatment work, the treatment effect is good, meanwhile, an inner circulating pump and a sludge reflux pump do not need to be used in the work, and the work cost is reduced.

The invention relates to a carbon nitrogen water coupling simulation method based on a hydrological response unit. The method comprises the following steps: collecting and processing data; an SWAT model is constructed; calibrating hydrological parameters; preparing an input file; the DNDC model is operated; evaluating a model effect; and simulating the carbon-nitrogen water flux. According to the method, the HRU serves as the minimum simulation unit of the DNDC model, and compared with grid simulation, calculation resources are saved, and the visualization effect is optimized. By constructing the research area SWAT model and calibrating the hydrological parameters, more accurate hydrological parameters are obtained, the calibrated hydrological parameters serve as input of the DNDC model, and the simulation precision of the DNDC model on hydrological variables is improved. In general, the DNDC model is applied to the watershed scale by taking the HRU as the minimum simulation unit, so that the simulation precision of the model on the hydrological process is improved, the calculation resources are saved, and the calculation speed is improved.