52 results about "Carbon nitrogen" patented technology

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 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 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 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 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.

The invention provides a method for reducing generation of odor in a preparation process of a sludge-based soil conditioner, and belongs to the technical field of sludge resourceful treatment.The method comprises the following steps that sludge and agricultural waste with the particle size of 1-3 cm are evenly mixed on the basis of the carbon nitrogen ratio of 20-30: 1, a complex microbial inoculant containing bacillus subtilis, nitrifying bacteria and saccharomyces cerevisiae is inoculated, and the mixture is stirred to be uniform; and adjusting the water content to about 60%, and carrying out aerobic composting fermentation in a fermentation tank to obtain the sludge-based soil conditioner. The method is good in composting effect, generation of odor in the sludge composting process is greatly reduced, and meanwhile reduction, harmlessness and resource recovery of the sludge and agricultural waste are achieved.

The invention relates to the technical field of post-wheat multiple cropping of hairy vetch, and discloses an efficient cultivation and soil fertilization method of post-wheat multiple cropping of hairy vetch, which comprises the following steps: after wheat is harvested, wheat straw is flatly laid, covered and returned to the field, and the covering thickness of the wheat straw is 10-15cm, so that an effective soil protection layer is formed, and soil erosion and water evaporation are reduced. According to the efficient cultivation and soil fertility improvement method for the post-wheat multiple cropping vicia villosa, the soil structure is effectively optimized through deep ploughing and wheat straw returning measures, the soil bulk density is reduced, the porosity is increased, the soil becomes loose and breathable, a good physical environment is provided for growth of vicia villosa roots, extension of the roots and nutrient absorption are facilitated, and the yield of the vicia villosa is increased. Meanwhile, root exudates, stubbles and the like in the growth process of the vicia villosa can increase the content of organic matter in the soil, meanwhile, the application of the charcoal powder supplements an organic carbon source of the soil, the carbon nitrogen ratio of the soil is increased, and the activity of microorganisms in the soil is promoted.

The invention relates to the technical field of sewage treatment, in particular to an MPF sewage treatment system and method.The system comprises a two-stage AO tank, a sedimentation tank, a backflow system and a carbon source adding device, and the problems that a traditional process is low in denitrification efficiency, unbalanced in carbon-nitrogen ratio and the like are solved through multi-point water inflow, graded backflow and precise parameter control. According to the system, the dissolved oxygen of the first-stage anoxic tank and the second-stage anoxic tank is controlled to be 0.2-0.4 mg / L, the dissolved oxygen of the first-stage aerobic tank and the second-stage aerobic tank is controlled to be 3.0-4.5 mg / L, the reflux ratio is 100-400%, the water inlet ratio is 0.5-1.0, and the carbon-nitrogen ratio is 2-6: 1. According to the method, through cooperation of two-stage denitrification and nitrification, efficient treatment of sewage with high ammonia nitrogen and low carbon nitrogen ratio is achieved, the removal rates of COD, ammonia nitrogen and total nitrogen can reach 85%, 80% and 70% or above respectively, and the method is suitable for scenes such as high-speed service areas and urban domestic sewage and has the advantages of being high in stability and low in energy consumption.

The application discloses a kind of microbial quick biofilm formation methods based on dissolved oxygen stress, belong to sewage treatment technical field.The core of the method is that through high dissolved oxygen aerobic activation and the alternative cycle of critical low dissolved oxygen anoxic stress, active physiological acclimation and screening are carried out to microbial community, and after each stress cycle, microaerophilic gas supply and low C / N ratio environment are used for directional enrichment, so that in a short time, the biological membrane rich in high-activity nitrifying bacteria and dense structure is quickly constructed on the surface of MABR membrane.The application breaks through the technical bottleneck of long biofilm formation period, intense competition of flora and easy shedding of biological membrane in traditional method, realizes efficient, rapid and stable start of MABR system, and is especially suitable for treatment of high ammonia nitrogen and low carbon nitrogen ratio sewage.

The invention discloses a high-load thiocyanate-driven autotrophic denitrification low-carbon denitrification method, and belongs to the field of biological sewage treatment. The invention aims to solve the technical problems of low treatment efficiency and unstable system caused by microorganism toxicity inhibition when the high-concentration thiocyanide-containing wastewater is treated by the existing biological method. According to the invention, through low-concentration induction, medium-concentration adaptation and high-concentration enhanced refined regulation and control, controllable environmental pressure screening is applied to microbial communities in a long period, microbial community succession is actively induced, and specific functional bacteria with efficient SCN-degradation pathway and high-toxicity tolerance are screened out. And in combination with compact granular sludge formed in the EGSB reactor, physical shielding is provided for internal microorganisms, and a microenvironment buffer layer for resisting impact of external high-concentration toxic substances is formed, so that macroscopic high-load tolerance of the whole system is realized. The invention is capable of tolerating and efficiently treating biological systems up to 1000 mg / L SCN-.

The utility model belongs to nitrogen carbon nitrogen (NCN) chemical industry solid by -product resource utilization equipment technical field, concretely relates to a kind of selective leaching system of dicyandiamide residue. Including acid leaching reaction system, it mainly includes dosing machine, acid leaching reactor and first solid-liquid separator connected in turn, acid leaching reactor is connected with ligand storage tank and acid liquor storage tank, the outlet of ligand storage tank is connected with ligand metering pump, the outlet of ligand metering pump is connected with the import of acid leaching reactor. The acid leaching reaction system of the application, by setting ligand metering pump and ligand storage tank, add organic complexing agent to reaction system, can adjust solution complexing balance, make calcium ion preferentially dissolve and reduce the dissolution degree of iron ion, improve calcium leaching rate, reduce iron leaching rate, the iron ion content in obtained leaching solution is lower, can reduce subsequent iron removal processing step.

The invention belongs to the technical field of agricultural ecosystem simulation and agricultural management optimization, and discloses a climate intelligent agricultural cross-scale collaborative optimization method under a climate warming background, which realizes deep fusion of crop growth, carbon nitrogen water circulation and greenhouse gas emission processes through segmented physical process coupling modeling; a knowledge guidance agent model is constructed, physical mechanism constraints and advantages of an intelligent algorithm are fused, high-resolution rapid simulation of a 30m field block scale is realized, and accurate management requirements are met; on the basis of a multi-objective optimization function and a genetic algorithm, precise field scale management and regional scale ecological constraints are planned as a whole, a cross-scale feedback relation is defined, and collaborative improvement of yield, emission reduction and resource utilization efficiency is achieved. According to the method, future climate and management scene changes are integrated through a scene-driven dynamic iteration mechanism, a staged optimal management path is formed, the timeliness and adaptability of an optimization strategy are improved, and scientific support is provided for climate intelligent agriculture development in different periods.

The present application relates to sewage biological treatment technology field, disclose a kind of short-cut nitrification long-term no sludge stable control nitrite oxidation bacteria operation strategy.This strategy uses high concentration inoculation sludge by anaerobic fermentation, fast sludge discharge, sludge is repopulated to realize short-cut nitrification start, obtain high activity AOB sludge;By retaining / inoculating predatory microorganism, combined with anaerobic hydrolysis to destroy biofilm, trace element strengthens predatory effect, realize long-term accurate control to NOB under no sludge condition;While regulating and controlling DO, FA and other environmental factors, maintain the dominant position of AOB.The present application can realize short-cut nitrification reactor 400d above no sludge stable operation, AOB abundance is stably above 30%, nitrite accumulation rate maintains above 90%, NOB abundance is controlled below 0.01% and activity is difficult to detect;With the characteristics of simple operation, economic and efficient, strong impact resistance, adapt to low carbon nitrogen ratio municipal sewage denitrification, can be coupled with anaerobic ammonia oxidation process to realize efficient denitrification, suitable for existing water plant original transformation.

The invention discloses a preparation process and application of a microbial fertilizer, and relates to the technical field of microbial fertilizers, and the preparation process comprises the following steps: uniformly mixing cassava residues, mushroom residues and water, and carrying out primary anaerobic fermentation; collecting primary biogas after the primary anaerobic fermentation, separating primary biogas residues, and performing secondary anaerobic fermentation on the primary biogas residues; secondary biogas obtained after secondary anaerobic fermentation is collected, secondary biogas residues are separated out, the secondary biogas residues are subjected to aerobic fermentation, and the microbial fertilizer is obtained after fermentation is finished. The cassava residues and the mushroom residues are subjected to two-time anaerobic fermentation and one-time aerobic fermentation, so that the fermentation of the raw materials is more thorough, the carbon nitrogen ratio in the produced microbial fertilizer is more reasonable, and the effects of safety and no seedling burning can be achieved in the use process.

The invention relates to the field of data analysis, and provides a compost product quality influence factor big data analysis method, which comprises the steps of S1, preliminary screening of compost product quality influence factors, S2, literature search and data collection, S3, data preprocessing, S4, determination of grouping factors and numerical factors, S5, statistical analysis, and S6, result analysis. The conclusion is that if a compost product with a lower carbon nitrogen ratio, a higher GI value and proper water content needs to be obtained, compound microorganisms can be inoculated during composting; if compost products with high TN and TP values need to be obtained, fungi can be inoculated during composting. According to the method, the specific influence of inoculation of different types of microbial agents and characteristics of different compost raw materials on the quality of compost products is defined, and production guidance is specifically provided for resource utilization of organic wastes.

The present application belongs to the technical field of sewage treatment, and particularly relates to a boron-magnesium reinforced plant oxygen excretion to realize sulfur autotrophic denitrification and phosphorus removal and hydrogen sulfide reduction amount of constructed wetland system and operation method. The system comprises a wetland system main body, the main body comprises a buffer zone and a reaction zone, and the two are separated by a porous plate; the buffer zone is provided with a water inlet; the reaction zone is provided with sulfur filter material capable of releasing boron and magnesium, the top end of the reaction zone is planted with wetland plants, and a water outlet is arranged; a hollow pipe is arranged in the center of the reaction zone, and a pH and dissolved oxygen probe is arranged in the pipe, the probe is connected with a pH and dissolved oxygen combined monitor through a wire; and the wetland system main body is connected with a water inlet bucket and a water outlet bucket. The system can realize low-carbon deep denitrification treatment of low-carbon nitrogen ratio sewage, realizes zero addition of external carbon source, the sulfur filter material capable of releasing boron and magnesium releases boron and magnesium elements to strengthen plant root oxygen excretion, an aerobic micro area appears, hydrogen sulfide is oxidized, hydrogen sulfide yield is reduced, and the generated elemental sulfur or sulfate further promotes sulfur autotrophic denitrification.