371 results about "Total nitrogen" patented technology

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

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

The invention provides a rapid evaluation method and system for the soil fertility level, and relates to the technical field of soil fertility detection.The rapid evaluation method comprises the steps that an original absorbance spectral data curve is obtained by scanning a soil sample, the moisture peak absorbance, the actual peak position wavelength and the moisture synthetic frequency characteristic peak width are extracted, and a spectral data basis is provided; a water-salt optical path coupling factor is calculated, water-salt correction operation is carried out in combination with a volume correction coefficient, a virtual dry soil spectrum data curve is obtained, interference of salt on a water optical path is quantified, and a water background and salt masking are eliminated; constructing a characteristic virtual baseline of the organic matter and the total nitrogen, calculating an integral area to obtain characteristic intensity of the organic matter and the total nitrogen, and providing a physical input variable for quantitative inversion; introducing a water-salt optical path coupling factor to invert the organic matter content and the total nitrogen content, and correcting signal depression caused by salt stress; the effective fertility index is calculated and graded by combining the organic matter content and the total nitrogen content of the soil, and the actual fertilizer supply capacity of the soil is comprehensively evaluated.

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

The invention provides a Yellow River water irrigation area non-point source pollution load space-time analysis method, and relates to the technical field of Yellow River water irrigation area non-point source pollution monitoring and analysis, and the method comprises the following steps: S1, collecting and preprocessing multi-source basic data; according to the Yellow River water irrigation area non-point source pollution load space-time analysis method, total nitrogen and ammonia nitrogen are accurately recognized as core pollutants through three-stage fuzzy comprehensive evaluation, the recognition accuracy is improved to 90% or above, and the problem that recognition is fuzzy in a traditional method is solved; by combining nitrogen and oxygen isotopes and a flora active chip, the manure sewage is determined as a main source of nitrogen for the first time, the traceability error is controlled within 10%, and the pollution source analysis blank is filled up; a core pollution area is defined through a gravity center migration model, the pollution load space-time distribution visualization degree is improved by 60%, and area differentiation treatment is achieved; a coupling migration model is constructed, the mechanism of reverse migration of pollutants caused by irrigation return water is clarified for the first time, and the interpretation precision reaches 85%.

The invention provides a soil health evaluation method. The method comprises the following steps: acquiring community characteristics of soil arthropods of to-be-evaluated soil; the soil arthropods are selected from at least one of diptera arthropods, arthropods of arachnids, coleoptera arthropods, hymenoptera arthropods and lepidoptera arthropods; the community characteristics comprise species composition and relative abundance of species; predicting soil indexes according to the community characteristics; the soil index is selected from at least one of a soil physicochemical index, a soil degradation index and a soil health index; the soil physical and chemical indexes are soil pH, soil total carbon, soil organic carbon and soil total nitrogen; the soil degradation indexes comprise a soil pH degradation index, a soil total carbon degradation index, a soil organic carbon degradation index and a soil total nitrogen degradation index; the soil health index is determined based on soil pH, soil microbial biomass nitrogen, soil respiration rate, soil total carbon, soil organic carbon, soil total nitrogen and soil bulk density; and performing soil health evaluation based on the soil indexes.

The invention discloses a method for determining a toughness and catastrophe threshold value of a functional group of a water ecosystem, and relates to the technical field of water environment ecological engineering.The method comprises the steps that the state of a target water ecosystem is determined according to the total nitrogen content, the total phosphorus content and the chlorophyll content of a water body in the target water ecosystem, the state of the target water ecosystem is eutrophication or non-eutrophication; determining the biomass of phytoplankton based on the target water ecosystem state; utilizing an Ecopath model to construct a static food network relation model of the target water ecosystem; based on the target water ecosystem state, the biomass of the phytoplankton and the static food network relation model, determining a toughness threshold value and a catastrophe threshold value of the biomass of each functional group; each functional group is a plurality of groups for dividing species in the target water ecosystem. According to the method, the water ecosystem functional group toughness threshold value and the catastrophe threshold value which are simple to operate and high in accuracy can be provided.

The invention belongs to the field of microorganisms, and particularly relates to a high-efficiency denitrification heterotrophic nitrification-aerobic denitrification klebsiella and a culture method and application thereof.A biological material of the high-efficiency denitrification heterotrophic nitrification-aerobic denitrification klebsiella is named as Klebsiella oxytoca CT4 and is preserved in Guangdong Microbial Culture Collection Center (GDMCC) on July 21, 2025, the preservation number of the Klebsiella oxytoca CT4 is CGMCC NO.9687, and the preservation number of the Klebsiella oxytoca CT4 is CGMCC NO.987. The preservation address is Institute of Microbiology, Guangdong Academy of Sciences, on the fifth floor of building 59, No. 100 courtyard, Xianlie Middle Road, Guangzhou, Guangdong Province; the preservation number of the strain is GDMCCNO: 66723; according to the strain, the ammonia nitrogen removal rate can reach 98.7% through nitrification-denitrification, the nitrite accumulation amount in the whole process is lower than 0.5 mg / L, and accumulation of toxic intermediate products is avoided. The strain has wide environmental adaptability, can keep efficient denitrification activity under the conditions that the pH is 5.0-10.0 and the C / N ratio is 5-30, can tolerate fluctuation of wastewater quality, does not need to repeatedly adjust the pH value when being used for treating aquaculture wastewater with a high C / N ratio (greater than 20), and can still stabilize the total nitrogen removal rate to be 80% or above, so that the addition cost in a conventional process is remarkably reduced.

The invention belongs to the technical field of sewage treatment, and particularly relates to a low-carbon-nitrogen-ratio sewage short-process nitrogen and phosphorus removal system and method. The method comprises the following steps: S1, capturing a carbon source and synthesizing an internal carbon source; s2, synchronous denitrification phosphorus removal; S3, layered nitrification treatment and internal carbon source reutilization; and S4, material circulation. According to the invention, denitrifying phosphorus-accumulating bacteria are used as an active carbon source carrier, and soluble VFAs which is easily fight for by common heterotrophic denitrifying bacteria is converted into solid PHA in the bacteria in a carbon source capture and internal carbon source synthesis tank; according to the method, the total nitrogen and the total phosphorus in the sewage with the low carbon-nitrogen ratio can be efficiently and deeply removed, and meanwhile, the method has the outstanding advantages of being low in energy consumption, small in sludge yield and small in occupied area.

The utility model discloses a micro-power nitrogen removal tank. The micro-power nitrogen removal tank comprises a first chamber, a second chamber, a fluid discharge channel and a gas supply unit, wherein the first chamber is used for reducing oxygen content; the second chamber is used for removing nitrogen; the first chamber is provided with a water inlet, the upper part of the first chamber is communicated with the upper part of the second chamber, and the lower part of the second chamber is communicated with the lower part of the fluid discharge channel; the gas supply unit is communicated with the lower part of the fluid discharge channel and is used for introducing gas into the fluid discharge channel; during application, aerobic bacteria can be added into the first chamber, and anaerobic bacteria can be added into the second chamber; sinking the micro-power nitrogen removal tank added with the strain into a sewage water body; the micro-power nitrogen removal tank disclosed by the utility model can realize flowing of an internal water body only under the action of airflow, is extremely low in energy consumption, and can assist in realizing removal of total nitrogen under the condition that the ecology of a natural water body is not changed.

The invention relates to a multi-factor combined water body total nitrogen concentration inversion method and device, and relates to the technical field of water quality inversion, and the method comprises the steps: obtaining reflectivity data corresponding to a to-be-researched water body region, and obtaining the actually measured total nitrogen concentration of a sampling sample in sampling points in the to-be-researched water body region; determining a total nitrogen inversion factor based on the reflectivity data; according to each actually measured total nitrogen concentration and each total nitrogen inversion factor, a target regression equation is constructed, and the target regression equation is a regression equation with the total nitrogen concentration as a dependent variable and the total nitrogen inversion factor as an independent variable; according to the target regression equation, important inversion factors are selected from all the total nitrogen inversion factors, all the actually-measured total nitrogen concentrations and the important inversion factors corresponding to all the sampling points serve as training samples, a preset initial random forest model is trained, and an inversion model of the total nitrogen concentrations is obtained. The method has the effect of improving the inversion accuracy of the total nitrogen concentration of the water body.

The invention provides a sewage enhanced nitrogen and phosphorus removal process based on microbial community interaction, and belongs to the field of sewage treatment. The method comprises the steps of sewage pretreatment, anaerobic phosphorus release, anoxic denitrification, aerobic nitrification phosphorus uptake and the like, an anaerobic-anoxic-aerobic three-section reactor is adopted, and proper ecological nichs are provided for phosphorus-accumulating bacteria, denitrifying bacteria and nitrifying bacteria by accurately regulating and controlling parameters such as dissolved oxygen, hydraulic retention time and carbon nitrogen ratio of each section, so that the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded, and the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded. The competition problem of biological nitrogen removal and biological phosphorus removal is effectively relieved, the nitrogen and phosphorus removal efficiency is remarkably improved, the total nitrogen removal rate reaches 85% or above, and the total phosphorus removal rate exceeds 90%; straw-based modified charcoal is adopted as a carrier, so that the loading capacity and activity of functional flora are improved, and flora interaction is enhanced; meanwhile, resource utilization of agricultural wastes is realized, and the method has remarkable environmental benefits and economic advantages.

The invention provides a farmland soil nutrient detection method and device, and relates to the technical field of soil detection.The method comprises the steps that target soil of a target field area in a farmland is collected; the target soil is crushed and dried, and the to-be-detected soil which is uniform in particle and dry is obtained; carrying out spectral data acquisition based on to-be-detected soil to obtain to-be-detected spectral data; the to-be-detected spectral data is input into a first detection model, a farmland soil nutrient detection result output by the first detection model is obtained, the farmland soil nutrient detection result comprises the total nitrogen content and the organic matter content of soil, and the first detection model is obtained through training based on a historical soil spectral data set. According to the farmland soil nutrient detection method provided by the invention, the high-quality to-be-detected spectral data is accurately and efficiently detected by utilizing the trained first detection model, so that the farmland soil nutrient detection precision is improved, and the farmland soil nutrient detection effect is improved.

The invention discloses an efficient denitrification method of a nitrification aerobic granular sludge and sulfur autotrophic denitrification coupling system based on a micro-nano aeration technology, and belongs to the technical field of water treatment. According to the method, a micro-nano aeration technology is adopted for culture of the nitrified aerobic granular sludge, culture and domestication of the aerobic granular sludge are facilitated, removal of pollutants can be promoted, the richness index and diversity index of the prepared nitrified aerobic granular sludge are both in a rising trend, and therefore the stability of a nitrification system is enhanced, and the nitrification effect of the nitrified aerobic granular sludge is improved. And the relative abundance of each nitration gene of the nitrated aerobic granular sludge is in a rising trend. The nitrification aerobic granular sludge system and the sulfur autotrophic denitrification system are coupled, the total nitrogen removal rate of 95% can be achieved when the HRT is equal to 1.5 h, the total nitrogen of effluent is 1.0 mg / L or below, a carbon source does not need to be added, and the denitrification performance is excellent.

The invention discloses an earthworm compost upgrading method based on a bacillus velezensis BV-1 aerobic compost product. Comprising the following steps: by taking an aerobic compost rotten product pretreated by bacillus velezensis BV-1 as a substrate, adjusting the moisture content of the substrate to a proper value without additionally adding a conditioner, inoculating eisenia foetida, performing earthworm composting in a dark environment, slightly turning piles every 4-5 days during the period to prevent anaerobism, and maintaining the moisture content of the substrate to be stable. The quality of the earthworm cast is remarkably improved through'matrix advantage + microorganism continuation effect 'of a BV-1 aerobic composting product, and the total nitrogen content of the earthworm cast reaches 18.29 g / kg and is improved by 12.6% compared with that of a control group; the conductivity is reduced to 1.84 mS / cm and is reduced by 8.91% compared with that of a control group; meanwhile, a nitrogen cycle functional gene (the relative expression quantity of the nosZ gene is increased by 15 times compared with that of a control group) is activated, organic matter degrading bacteria Arenibacter (the relative abundance is 8.37%) are enriched, and unification of high nitrogen, low salt and high biological activity of earthworm compost products is achieved.

The invention belongs to the technical field of soil improvement, and particularly relates to stenotrophomonas maltophilia C-GD and application thereof in nitrogen fixation. The nitrogenase activity of the stenotrophomonas maltophilia C-GD is 45.90 (ng / g / 24h), and the stenotrophomonas maltophilia C-GD shows relatively good nitrogen fixation activity and can be used for nitrogen fixation of soil. The invention provides a strain of Stenotrophomonas maltophilia C-GD with a nitrogen fixation function, and after the Stenotrophomonas maltophilia C-GD is prepared into a microbial inoculum to be applied, the key nutrient indexes of organic matters, total nitrogen, total phosphorus, available phosphorus, alkali-hydrolyzable nitrogen and the like in soil can be greatly improved.

This invention provides a gas-phase molecular absorption spectrometry-naphthylethylenediamine hydrochloride spectrophotometric method for determining total nitrogen in waste gas from stationary pollution sources. The method comprises the following steps: S1. Reacting the waste gas with an oxidant; S2. Using an absorbent, further reacting the waste gas after S1; S3. Collecting the oxidant after S1, pretreating it to reduce nitrogen-containing compounds to nitric oxide, and detecting the total nitrogen content I; S4. Collecting the absorbent after S2 to obtain the total nitrogen content II; S5. Summing the total nitrogen content I and total nitrogen content II to obtain the total nitrogen content in the current waste gas. This method enables accurate determination of total nitrogen in waste gas from stationary pollution sources.

The application discloses a kind of fermentation complex microbial inoculant and preparation method and application thereof, the fermentation complex microbial inoculant includes the following weight parts of component: bacillus subtilis microbial inoculant 2-5 parts, bacillus mucilaginosus microbial inoculant 5-10 parts, yeast microbial inoculant 2-10 parts, trichoderma harzianum microbial inoculant 10-20 parts, aspergillus niger microbial inoculant 10-20 parts and streptococcus thermophilus microbial inoculant 2-5 parts;The fermentation complex microbial inoculant of the application is prepared by selecting each strain and amount, is added to pigeon manure and is fermented to prepare organic fertilizer, can better decompose macromolecular substance, significantly improve the organic matter and total nitrogen content in preparation organic fertilizer, and can better improve seed germination rate;In addition, the preparation method of pigeon manure organic fertilizer of the application is simple in process, easy to operate, and convenient for production.

The invention belongs to the field of intelligent control of sewage treatment, and particularly provides an anoxic tank nitrate optimization control method and system based on dynamic grading of total nitrogen in inlet water, a storage medium and equipment. Calculating a control value of nitrate nitrogen at the tail end of the anoxic tank; calculating the total amount of nitration nitrogen removed by the inlet water carbon source, calculating the total amount of nitration nitrogen needing to be removed by adding the carbon source according to the anaerobic tank-anoxic tank nitration nitrogen load, the total amount of nitration nitrogen removed by the inlet water carbon source and the anoxic tank nitrate nitrogen control value, and calculating the adding amount of the carbon source needing to be added according to the total amount of nitration nitrogen needing to be removed by adding the carbon source; and monitoring the actual nitrate nitrogen concentration at the tail end of the anoxic tank, comparing the actual nitrate nitrogen concentration with the nitrate nitrogen control value at the tail end of the anoxic tank, and adjusting the adding amount of the carbon source. By monitoring inlet water and process parameters in real time, integrating microbial assimilation, dynamically calculating the control threshold value of nitrate in the anoxic tank and then calculating the basic adding amount of the carbon source, it is guaranteed that the total nitrogen in total outlet water stably reaches the standard, and the consumption of the carbon source is reduced.

The invention discloses an intelligent carbon source dosing control system and method adopting a double-model control mode, and belongs to the technical field of sewage treatment. The method comprises the following steps: step 1, acquiring real-time online data of a sewage treatment plant and running state data of related instrumentation equipment; 2, judging whether the real-time online data and the running state of the corresponding instrument equipment are normal or not; 3, analyzing real-time online data of the biological tank, the deep denitrification unit and total effluent, and starting intelligent carbon source dosing control mode selection according to a treatment result; 4, selecting a total nitrogen control mode or a nitrate nitrogen control mode, and calculating the carbon source dosage of the biological tank and the deep denitrification unit; and 5, respectively adding a carbon source into the biological tank and the deep denitrification unit. According to the invention, a double-model architecture for respectively controlling nitrate nitrogen and total nitrogen is constructed, so that the problem of abnormity caused by a single control mode is solved, and the purpose of timely and accurately adding a carbon source can be achieved.

The invention discloses a surface ruthenium-nitrogen coordinated Ru nano-particle catalyst, a preparation method and application of the surface ruthenium-nitrogen coordinated Ru nano-particle catalyst in bisphenol A hydrogenation reaction. Ruthenium acetylacetonate and a nitrogen-containing ligand form a porous precursor by adopting a sol-gel method, and then the porous precursor is subjected to inert gas pyrolysis and H2 / NH3 activation treatment. In an XPS (X-ray polystyrene) N1s spectrogram of the prepared Ru nano-particle catalyst, Ru-N coordination nitrogen at 399.0-399.5 eV accounts for 30%-60% of the total nitrogen atom. When the catalyst is applied to bisphenol A hydrogenation reaction, the sulfur content of the raw material is less than 100ppm, and the yield of hydrogenated bisphenol A can reach 94%; the attenuation is less than 5% after 5 cycles, and the sulfur adsorption capacity of the Ru nano-particle catalyst is less than 0.1 wt%. The surface ruthenium-nitrogen coordinated Ru nano-particle catalyst is high in activity, good in selectivity and excellent in sulfur tolerance, can stably play a role in a sulfur-containing environment, is simple and controllable in preparation process, and is beneficial to industrial production.

1. The name of the design product: full-automatic total phosphorus and total nitrogen intelligent analyzer. 2. The use of the design product: for detecting total phosphorus, total nitrogen and other indicators of water quality. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The application discloses a production process for preparing composite carbon source by utilizing fruit and vegetable waste resources, and comprises the following steps: raw material pretreatment, anaerobic fermentation for acid production, composite enzymolysis, deep solid-liquid separation, composite blending, and stabilization treatment; the blending carbon source liquid is pumped into the stabilization treatment tank, 0.1%-0.3% of a compounded stabilizer is added, the pH value is adjusted to 6.0-7.0, normal-temperature standing is carried out for 12-24 hours, product detection and storage are carried out, the carbon source product after the stabilization treatment is detected in terms of COD, total nitrogen, total phosphorus, the pH value and the content of small-molecule organic acid, and after each index is qualified, the product is sealed and packaged and stored in a cool and dry environment, and the application solves the technical problems of high cost, poor safety, single fruit and vegetable base carbon source component, low degradation efficiency and poor product stability of traditional carbon sources.

The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment system and a sewage treatment method.The water inlet end of an anaerobic tank of the system is connected with a sewage pipe and a sludge return pipe of a pre-anoxic tank, the water outlet end of the anaerobic tank is connected with the water inlet end of an anoxic tank, the water inlet end of the anoxic tank is connected with a mixed liquid return pipe of an aerobic tank, and the water outlet end of the anoxic tank is connected with the water inlet end of the aerobic tank; one path of the water outlet end of the aerobic tank is connected with the anoxic tank through a mixed liquid reflux pump, one path is connected with the water inlet ends of the first sequencing batch tank and the second sequencing batch tank, and the first sequencing batch tank and the second sequencing batch tank are respectively connected with the sludge concentration tank. The treatment method comprises the following steps: (1) a pretreatment stage; (2) anaerobic stage; (3) an anoxic stage; (4) aerobic stage; (5) a multi-stage step sequence stage; (6) a sludge concentration stage; and (7) a pre-hypoxia stage. According to the system and the method, a double-reflux and multi-stage process is realized, the biological environment of microorganisms is enhanced, the total nitrogen content and the total phosphorus content stably reach the standard, suspended solids reach the standard, and the sludge running risk is reduced.

1. The name of the design product: full-spectrum multi-parameter water quality online analyzer (SECCO-L-1905). 2. The use of the design product: for analyzing and detecting key water quality indicators such as total phosphorus, total nitrogen, COD, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, etc. in water, online monitoring, fixed and mobile monitoring of water quality in "source-net-plant-river" multiple scenes, and water pollution prevention and supervision. 3. The design points of the design product: the combination of the shape and pattern of the product as a whole. 4. The picture or photo that best indicates the design points: perspective view 1.

The present application belongs to the technical field of nitrogen and phosphorus non-point source pollution key source area identification, and relates to a nitrogen and phosphorus non-point source pollution key source area identification method based on weighted feature importance. Watershed water system, underlying surface conditions, meteorological, hydrological and water environment data are collected and arranged to establish a watershed nitrogen and phosphorus non-point source pollution tracing basic data set. A RF model, a GBRT model, an XGBoost model and a CatBoost model are used to construct a basic model for simulating total nitrogen and total phosphorus flux, and a Ridge model is used to construct a meta-model for simulating total nitrogen and total phosphorus flux. The basic model is applied to carry out sub-basin feature importance analysis, and the meta-model is applied to carry out basic model weight analysis. By analyzing the weighted feature importance of the sub-basin, the nitrogen and phosphorus non-point source pollution key source area is identified according to the importance from high to low. The present application makes up for the shortage of the existing non-point source pollution key source area identification method based on mechanism model, i.e. more parameters and difficult calibration.

The invention discloses a process and a device for producing acid by coupling chemical enhanced membrane grid filtration with anaerobic fermentation, and belongs to the technical field of sewage treatment. The method comprises the following steps: enabling effluent of an aerated grit chamber of a municipal sewage treatment plant to pass through a reaction tank consisting of a coagulation tank and a flocculation tank, a filter tank and an anaerobic fermentation tank, and feeding obtained filtrate and mixed liquid into a biochemical tank for biological denitrification. The device adopting the process is used as a pretreatment process unit for biological denitrification of a biochemical pool, on one hand, the concentration of soluble COD (Chemical Oxygen Demand) in influent water of the biochemical pool can be improved, the total nitrogen removal effect can be further improved, the total nitrogen of effluent can be reduced by 2-4mg / L, and optimal preparation of resources is realized, and on the other hand, the process and the device can completely or partially replace an external carbon source, so that the environmental pollution is reduced. And considerable economic benefits are generated.

The invention discloses an intelligent advanced denitrification wastewater treatment method based on SND-ED, and relates to the technical field of wastewater biological treatment. The method comprises the following five stages: regulation / homogenization, hydrolysis / acidification, anaerobic pretreatment, intelligent SND-ED biochemical treatment, and precipitation / sludge reflux / sludge discharge. Refractory organic matters are subjected to pre-hydrolysis / anaerobic treatment to generate an easily degradable organic carbon source, parameters such as DO (dissolved oxygen) and pH (potential of hydrogen) are monitored on line, and aeration and oxygen deficit are periodically and alternately performed by the intelligent control unit, so that synchronous and efficient removal of COD (chemical oxygen demand) and total nitrogen in wastewater is realized, and finally, COD and nitrogen in effluent are lower than emission standards. The method is stable in operation, high in impact load resistance, low in energy consumption, low in sludge yield and suitable for deep denitrification treatment of high-nitrogen-content and high-organic-load industrial wastewater.

The invention relates to the technical field of aquaculture, in particular to an accurate regulation and control method for micropterus salmoides culture water quality. According to the micropterus salmoides culture water quality regulation and control method, a culture water body meets one or more of the following conditions: (1) adding photosynthetic bacteria into the culture water body every day, and controlling the final concentration of the photosynthetic bacteria in the water body to be 10 < 6 >-10 < 7 > CFU / mL; (2) adjusting the content of dissolved oxygen in the culture water body to 5.5-7.5 mg / L; (3) adjusting the temperature of the culture water to 26 + / -1 DEG C in the daytime and 23 + / -1 DEG C at night. The total nitrogen, total organic carbon and chemical oxygen demand can be obviously reduced through day and night temperature regulation and addition of photosynthetic bacteria, the water change demand is reduced, and the eutrophication risk is reduced; meanwhile, the specific growth rate (SGR) and the weight growth rate (WGH) are improved, the immune and antioxidant indexes are optimized, and the aeration energy consumption is reduced by controlling dissolved oxygen to be 7.0 mg / L.

This application discloses a method, apparatus, terminal, and medium for generating a total nitrogen detection scheme for wastewater. The method includes: acquiring basic experimental data and dynamic scene data corresponding to the wastewater; mapping the basic experimental data to obtain total nitrogen detection feature data; predicting total nitrogen detection output data based on the total nitrogen detection feature data and the dynamic scene data using a preset total nitrogen detection prediction model; and obtaining a target total nitrogen detection scheme based on the total nitrogen detection output data, the basic experimental data, and the dynamic scene data. This application aims to reduce the error rate of total nitrogen detection in wastewater in a target area and achieve adaptive calibration and precision in the detection process.