373 results about "Nitrate nitrogen" patented technology

The invention relates to a Fenton-like functional filler which is prepared from 10-20% of iron particles coated with a carbonized film, 10-20% of aluminum sulfate modified straw, 20-30% of PBAT-coated calcium peroxide, 20-30% of diatomite and 10-30% of an adhesive. A processing method of a Fenton-like functional filler comprises the following steps: uniformly mixing iron particles coated with a carbonized film, aluminum sulfate modified straws, PBAT-coated calcium peroxide and diatomite, then adding an adhesive, mixing isocyanate serving as the adhesive with polyol according to a volume ratio of 1: 5, and continuously and uniformly mixing; then the mixed raw materials are injected into a mold coated with a release agent in advance, the mold temperature ranges from 40 DEG C to 60 DEG C, the foaming curing time ranges from 15 min to 20 min, and the Fenton-like functional filler can be obtained. The invention relates to an application of a Fenton-like functional filler in constructed wetlands. The method has the beneficial effects that the method is not influenced by temperature, and the removal effect of the constructed wetland on nitrate nitrogen and refractory COD (Chemical Oxygen Demand) can be obviously enhanced.

The utility model provides a low-carbon high-efficiency biochemical system control system. The low-carbon high-efficiency biochemical system control system comprises an internal reflux control module, a carbon source adding module and a precise aeration module, the internal reflux control module is used for refluxing nitrate nitrogen required to be denitrified to the anoxic tank for denitrification; the carbon source adding module is used for giving the current required dosage through online nitrate nitrogen instruments arranged in an anoxic tank and an aeration tank according to dynamic nitrate nitrogen value comparison and variation trend comparison at the tail end of the anoxic tank; and the accurate aeration module reads the real-time numerical value of ammonia nitrogen at the tail end of the aeration tank, performs mean value calculation on the numerical value in each period, performs difference value calculation on the average value of ammonia nitrogen in the current period and the average value of ammonia nitrogen in the last period, and reaches the numerical value of dissolved oxygen through frequency adjustment of an aeration fan to run in a required operation interval. The control method of the low-carbon high-efficiency biochemical system aims to realize low-carbon high-efficiency accurate control of the biochemical system, aeration as required, addition of an external carbon source and control of internal reflux.

The invention belongs to the technical field of sewage treatment, and discloses a two-stage MABR-based efficient denitrification system, method and application, the system comprises an MABR-PN / DN reactor, an MABR-PN / A reactor, a peristaltic pump, an aeration hollow fiber membrane module, a carrier, an aeration pump, a gas flowmeter, a pressure gauge and a liquid flowmeter, and the MABR-PN / DN reactor and the MABR-PN / A reactor are arranged along the vertical direction. According to the system, the series design of the MABR-PN / DN and the MABR-PN / A is utilized, the adverse effect of organic matter in sewage on anaerobic ammonia oxidation treatment of high-concentration ammonia nitrogen wastewater is reduced, nitrate nitrogen generated by the MABR-PN / A flows back to the first-stage MABR-PN / DN to achieve denitrification, the denitrification limitation of a single reactor and a single denitrification path is broken through, and the overall total nitrogen removal rate of the system is higher than 90%.

The invention provides a full-spectrum water quality multi-parameter dynamic inversion method and a model construction method thereof, and belongs to the technical field of spectral analysis based on machine learning. By constructing a closed-loop optimization architecture of noise reduction, wavelength optimization, turbidity correction and adaptive modeling, high-precision detection of four water quality parameters of chemical oxygen demand, total organic carbon, total nitrogen and nitrate nitrogen is realized. According to the method, a variational mode decomposition and improved threshold translation invariant wavelet combined noise reduction algorithm is provided, a kurtosis-correlation coefficient dual index is adopted to screen noise components, a multi-translation average strategy is combined to suppress a pseudo-Gibbs phenomenon, and meanwhile, a global parameter collaborative tuning mechanism based on Bayesian optimization is designed; a cross-module hyper-parameter coupling space is established in the whole process of noise reduction, wavelength optimization, turbidity correction and modeling. Through a multi-dimensional feature enhancement mechanism, the model feature representation capability is improved by 35%, and an innovative solution is provided for multi-parameter online detection in a complex water quality scene.

The invention discloses a straw returning water-nitrogen synergistic method based on a biochemical inhibitor, and belongs to the technical field of agricultural resources and environments. The straw returning water-nitrogen synergistic method based on the biochemical inhibitor comprises the following steps that in an annona squamosa-soybean interplanting system, a water-nitrogen synergistic agent is added into an annona squamosa-soybean interplanting system; the nitrogen release and straw decomposition process is regulated and controlled through the synergistic effect of the biochemical inhibitor and water management, short-term crop requirements and long-term soil fertilization are both considered, and the water and nitrogen utilization efficiency is improved. According to the invention, a comprehensive strategy of'regulation and control of nitrogen release by a biochemical inhibitor and collaborative management of water and nitrogen 'is adopted. Release of nitrogen fertilizer is delayed through the urease inhibitor, straw decomposition and crop requirements are matched, and short-term nitrogen starvation of soybeans is avoided; generation of nitrate nitrogen is reduced through the nitrification inhibitor, nitrogen leaching and denitrification loss are reduced, and the nitrogen fertilizer utilization rate is increased; the irrigation amount is adjusted according to the straw decomposition stage and the crop growth stage, microbial decomposition is driven, and meanwhile the carbon conversion efficiency is improved.

An ecological combined constructed wetland system for rare earth mine tail water treatment is characterized in that a downward vertical flow wetland and an upward vertical flow wetland of a three-stage combined wetland system are communicated through a bottom communicating pipe, and the upward vertical flow wetland and a floating island wetland are communicated through an upper overflow weir; the tail water treated by the sewage adjusting tank sequentially flows through the downward vertical flow wetland, the upward vertical flow wetland and the floating island wetland; each of the downward vertical flow wetland and the upward vertical flow wetland comprises a filler layer with a three-layer structure, and the upper layer is a plant substrate layer and is composed of fine sand or sandy loam; the middle layer is a functional material layer and is composed of hematite, zeolite or activated carbon; the lower layer is a supporting layer and is composed of coarse sand or gravel; and the aquatic plants of the floating island wetland adsorb pollutants in the water body through root systems, and decompose residual pollutants by utilizing the metabolism of the plants. The tail water treatment device can efficiently remove particular pollutants such as ammonia nitrogen, nitrate nitrogen, heavy metals and rare earth elements in the tail water of the rare earth mine.

The invention discloses a sea-land interaction zone underground water pollution source tracing method based on multi-pollutant fingerprints, and the method comprises the steps: constructing a fingerprint feature library of eight key pollutants including cadmium, arsenic, nitrate nitrogen, ammonium nitrogen, phosphate, total petroleum hydrocarbon, sulfamethoxazole, pH value and the like; statistical characteristic models of four pollution sources of industrial emission, agricultural non-point sources, oil exploitation and aquaculture are established, Z-Score standardization and a similarity calculation method based on a standard normal distribution probability density function are adopted, comprehensive similarity evaluation is performed in combination with a risk weight distribution mechanism, a similarity threshold value of 0.7 is set to perform pollution source identification and sorting, and the pollution sources are identified and sorted according to the similarity threshold value. And correction is performed by considering environmental factors such as tide, season and geology of a sea-land interaction zone. The method can quickly and accurately recognize the groundwater pollution source of the sea-land interaction zone, the traceability accuracy rate reaches 80% or above, and scientific and technical support is provided for prevention and control of groundwater pollution of the sea-land interaction zone and formulation of an environmental protection policy.

The invention relates to the technical field of agricultural fertilizers, in particular to an enzymolysis fish protein type amino acid-containing water-soluble fertilizer and a preparation method thereof, the fertilizer is prepared from 50-70% of enzymolysis fish protein stock solution and other components; the stock solution is prepared by pulping aquatic product processing leftovers, adjusting the pH value to 6.5-7.5, adding specific compound protease for enzymolysis, and performing enzyme deactivation and centrifugation; the macroelement liquid contains nitrate nitrogen and ammonium nitrogen (2: 1-4: 1), and the microelement chelating agent is prepared by reacting a stock solution small molecule peptide with a specific salt. The fish protein enzymolysis stock solution is prepared from aquatic product processing leftovers, high-proportion small molecule peptide and amino acid are obtained through specific enzymolysis and other processes, and by matching with high-content macroelements in a specific nitrogen form, nutrition can be rapidly supplemented, and crop photosynthesis and dry matter accumulation can be improved; and moreover, all the components cooperate to regulate the growth of the crops and improve the stress resistance, and the surfactant also improves the utilization rate of the fertilizer and reduces waste.

The invention provides an astragalus mongholicus residue biochar-loaded microbial inoculant and a preparation method and application thereof.The preparation method comprises the steps that an Enterobacter mori XJ 10 inoculant is cultured firstly, then modified biochar is obtained through high-temperature pyrolysis of astragalus mongholicus residues and modification of industrial brown sugar, the modified biochar and the astragalus mongholicus residues are mixed according to the proportion, oscillated adsorption and vacuum drying are conducted, and the biochar-loaded functional inoculant is obtained. When the Cd-Pb composite contaminated soil is remediated by applying the microbial inoculum and the king grass cooperatively, compared with a contaminated control group (CK-2), the plant height, the stem diameter and the biomass of the king grass are increased by about 119.3%, 116.7% and 53.8% respectively, and the biomass is 9.8% higher than that of original soil (CK-1); ammonium nitrogen, nitrate nitrogen, available phosphorus and quick-acting potassium in the soil are increased by 255%, 892.6%, 203.5% and 301.6% respectively; and the Cd removal rate and the Pb removal rate are respectively increased by about 24.5% and 24.3%. Resource utilization of the radix astragali residues is achieved, a'charcoal-fungicide-king grass' synergistic system breaks through the limitation of a single remediation technology, pollution remediation and soil fertility improvement are both considered, and the method has the advantages of being low in cost, efficient and sustainable.

The invention relates to the technical field of environmental microbial resource development and sewage denitrification. The invention discloses an efficient denitrification strain Paracoccus sp.N21 with a flocculation characteristic, which is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.34710. The invention further discloses a preparation method of the efficient denitrification strain Paracoccus sp.N21. The strain obtained by the invention can completely remove ammonia nitrogen within 12 hours and thoroughly remove nitrate nitrogen within 48 hours, the removal rate reaches 100%, and ammonia nitrogen is preferentially degraded in a mixed nitrogen source. The method has the unique advantages that the flocculation rate in the nitrification process and the flocculation rate in the denitrification process exceed 93.9%, and the usage amount of a flocculating agent can be greatly reduced. When actual kitchen wastewater is treated, the ammonia nitrogen removal rate reaches 100%, and the removal rate reaches up to 7.51 mg / (L.h). The application of the strain can effectively reduce the volume of a reactor, reduce energy consumption and operation cost, provides a new solution for simplifying a biological denitrification process, is particularly suitable for treating high-ammonia-nitrogen kitchen wastewater, and has remarkable environmental and economic benefits.

The invention belongs to the technical field of in-situ analysis of water environment interface nutrient elements ammonia nitrogen and nitrate nitrogen, and particularly relates to a zeolite and S110MH mixed adsorption film and a preparation method and application thereof. The zeolite and S110MH mixed adsorption film provided by the invention comprises agar hydrogel and adsorbent particles dispersed in the agar hydrogel, and the adsorbent particles comprise zeolite particles and anion exchange resin particles. The invention provides a preparation method of a zeolite and S110MH mixed adsorption film, functional parameters of the mixed adsorption film and a DGT device installed on the mixed adsorption film, and a testing method of DGT in various environmental media. Experiments show that the DGT device provided with the zeolite and S110MH mixed adsorption film can accurately test the time average concentration or diffusion flux of ammonia nitrogen and nitrate nitrogen at rhizosphere of a water body, sediment or aquatic plants, and reflect the bio-availability, geochemical process and mobility of inorganic nitrogen.

The present application relates to the field of agricultural environmental protection method, particularly to a method for reducing the pollution of vegetable field soil non-point source and N2O.The method provided by the present application fully considers the carbon and nitrogen content, C / N and cellulose content of different exogenous carbon materials, reduces the application of chemical fertilizer nitrogen under the premise of ensuring the nitrogen supply of vegetables according to the nitrate nitrogen content of vegetable field soil, increases the amount of effective state carbon and the content of holocellulose by optimizing the combination and proportion of different exogenous carbon materials, improves the nitrate nitrogen assimilation of vegetable field soil, reduces the nitrogen leaching and soil N2O emission, and realizes the coordinated reduction and regulation of the pollution of vegetable field soil non-point source and N2O.The method is clear, simple, convenient, easy to implement.

According to the fault-tolerant control method for the actuator fault in the urban sewage treatment process, stable control over the dissolved oxygen concentration and the nitrate nitrogen concentration in the urban sewage treatment process under the influence of the actuator fault is achieved. Firstly, a nonlinear observer is designed to accurately estimate an actuator fault; secondly, constructing a radial basis function neural network to accurately characterize the time-varying nonlinear dynamic characteristics of the sewage treatment process; a fault-tolerant controller based on self-adaptive dynamic programming is designed, and the problem that the dissolved oxygen concentration and the nitrate nitrogen concentration deviate from set values due to actuator faults is solved jointly by constructing an evaluation network and an execution network, training a neural network by adopting a strategy iterative algorithm, solving an approximate optimal control law and fusing a prior classical controller. Experimental results show that the method can realize fault-tolerant control of the dissolved oxygen concentration and the nitrate nitrogen concentration, and ensures stable operation of the urban sewage treatment process.

The utility model discloses a mariculture nitrate nitrogen monitoring system, which comprises a flow-type sensor mounting joint J, a nitrate nitrogen sensor C, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D and a nitrate nitrogen sensor D, and is characterized in that the top of the sensor mounting joint J is provided with a discharge port J2; the input end of the sewage pump B is communicated with the sewage pool, and the output end is communicated with the input end J1 of the sensor mounting joint J; the air compressor is communicated with the airflow input end J3 of the sensor mounting joint J through an air compression valve F1; the input end of the discharge valve F3 is communicated with the input end J1 at the bottom of the sensor mounting joint J; the input end of the water purification valve F4 is communicated with the water purification tank, and the output end is communicated with the input end J1 of the sensor mounting joint J; and the controller is electrically connected with the nitrate nitrogen sensor C and the valves respectively. The sewage pool is provided with a plurality of paths, and each path of sewage pool is communicated with the sewage pump B through a sewage valve. The utility model has the beneficial effects of low maintenance cost, prolonged service life and improved detection precision.

The application discloses a high-salt-resistant denitrifying bacterial strain and a microsphere preparation thereof, a preparation method and application thereof, relates to the technical field of environmental microorganisms and wastewater biological treatment. Pseudomonas sp. The classification name of the strain is Pseudomonas sp., the preservation number is CGMCC No. 36626, the strain is preserved in the China General Microbiological Culture Collection Center, and the preservation date is November 14, 2025. The preparation method of the microsphere preparation containing the strain comprises the following steps: carrying out strain amplification culture to obtain a bacterial liquid, mixing the bacterial liquid with porous starch and a protective agent, then performing vacuum freeze drying to obtain bacterial powder, and then mixing the bacterial powder with a sodium alginate solution, and dropping the mixture into a calcium chloride solution to obtain the microsphere preparation. The microsphere preparation can maintain a nitrate nitrogen removal rate of more than 80% after being stored at-18 to-22 DEG C or 20 to 25 DEG C for 28 days, and can be used for denitrification and nitrogen removal of low-carbon-nitrogen-ratio and high-salt wastewater (such as urine wastewater in a closed circulation system).

The invention relates to a low-concentration nitrate nitrogen removal and conversion method based on functionalized flowing electrode slurry, which comprises the following steps: in a low-concentration nitrate nitrogen polluted water body, using the functionalized flowing electrode slurry to carry out capacitive deionization treatment under external first voltage so as to realize selective adsorption and concentration of nitrate nitrogen, the functionalized flowing electrode slurry comprises a carbon material which is modified by functional groups and has electrocatalytic activity; and carrying out electrochemical reduction reaction on the functionalized flowing electrode slurry subjected to nitrate nitrogen concentration under external second voltage, and reducing the adsorbed nitrate nitrogen into ammonia, so as to realize removal and recycling of the nitrate nitrogen. According to the invention, through a two-step process design of first transfer and second conversion, and by adopting the functionalized flowing electrode slurry, the two problems of deep removal and resource recovery of low-concentration nitrate nitrogen are effectively solved.

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 a sulfur autotrophic denitrification system monitoring and control method and system based on machine learning, and the method comprises the steps: collecting system operation parameter data in real time, inputting the system operation parameter data into a first machine learning model, and predicting the effluent nitrate nitrogen concentration of the system by the model; when the predicted concentration value is higher than a preset emission standard threshold value, an early warning signal is triggered; identifying key influence factors with high effluent nitrate nitrogen concentration value by adopting an SHAP interpretability analysis method, and carrying out quantitative sequencing on influence degrees of the factors; based on the obtained key influence factors and related data, a bimodal load management strategy or a precise chemical dosing strategy is selected and executed, and the effluent nitrate nitrogen concentration of the system is controlled within the emission standard threshold value range. The sulfur autotrophic denitrification system is subjected to monitoring-diagnosis-control closed-loop intelligent management, so that refined and active regulation and control of the sulfur autotrophic denitrification process are realized, and the operation stability, the treatment efficiency and the economical efficiency of the system are improved.

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 provides an MBR process intelligent monitoring analysis and decision-making system, and belongs to the technical field of sewage treatment. According to the invention, monitoring and process diagnosis control of DO, MLSS, ammonia nitrogen, nitrate nitrogen and phosphate in the MBR water inlet tank, the anaerobic tank, the front anoxic tank, the aerobic tank, the rear anoxic tank, the membrane tank and the water outlet tank are realized. The intelligent sampling system realizes water quality testing at different positions of each unit, the testing sequence and frequency of each unit can be intelligently regulated and controlled, and the water quality rule of the whole system and each unit can be timely mastered. The data modeling and analysis system is used for mining the value of the on-way test data, establishing an analysis index and establishing a calculation model and an evaluation standard. The expert diagnosis and adaptive optimization system establishes an association logic algorithm of analysis indexes and process regulation and control measures, performs diagnosis and optimization operation on the operation condition of the sewage plant, and feeds back the regulation and control effect to the system for adaptive optimization of the logic algorithm, so that the refined and intelligent operation degree of the sewage plant is improved, the effluent quality is guaranteed, and energy conservation and consumption reduction are realized.

The present invention relates to a water treatment membrane, and more particularly, to a household water treatment membrane, which has an excellent nitrate nitrogen removal rate for raw water with high hardness component by introducing a bulky sulfonic acid group having a high surface negative charge concentration, a method of manufacturing the same, and a membrane module including the same.

The invention discloses a low-consumption green nitrogen removal method, and relates to a green nitrogen removal method of a sewage treatment plant. The method comprises the following steps: (1) mixing high nitrate nitrogen wastewater and high sulfur wastewater to obtain mixed wastewater; and (2) adding anaerobic sludge into the mixed wastewater, and stirring until the mixed treatment is stably operated to obtain nitrogen-removed wastewater. According to the invention, an operation mode is adopted under the conditions that carbon sources are saved and effluent is qualified, and finally, qualified emission, energy conservation and consumption reduction are realized.

The application discloses a continuous ion exchange adsorption device for denitrification and a use method thereof. The device comprises an ion exchange column, which is provided with a resin inlet at the top and a water inlet and a resin outlet at the bottom; an aeration system, which comprises an aeration head arranged at the bottom area of the ion exchange column and an aerator for supplying air to the aeration head; and a water inlet and outlet system, which comprises a water inlet pump and a water inlet pipe in communication with the water inlet and at least one water outlet arranged on the side wall of the ion exchange column, and each water outlet is connected with a filter assembly for filtering resin. The adsorption device disclosed by the application can realize targeted removal of nitrate nitrogen by promoting the mixing process of resin and nitrogen-containing wastewater through reverse flow of nitrate anion resin and nitrogen-containing wastewater in the ion exchange column, has good treatment effect, is applicable to variable water quality and has low operation cost.

The application relates to a RBS intelligent control method for carbon source and phosphorus removal agent dosing of a denitrification filter, relates to the technical field of sewage treatment, can realize precise dosing of the agent, can reduce the backwashing frequency of the denitrification filter, thereby effectively saving operation energy consumption, and realizes green, low-carbon and high-quality operation of a sewage plant. In the RBS intelligent control method for carbon source and phosphorus removal agent dosing of the denitrification filter, the carbon source dosing comprises the following steps: a control system collects an inflow flow signal, an inflow nitrate nitrogen concentration signal, outflow COD instrument information and filter DO instrument information, calculates a theoretical carbon source dosing amount through a fuzzy control theory, and regularly adjusts an actual carbon source dosing amount through feedback of an outflow nitro base nitrogen concentration signal; the outflow NO X -N is less than 1 mg / L, the carbon source dosing is not excessive, the outflow BOD and COD are less than the inflow, and under the condition that the carbon source dosing amount is the lowest, the outflow TN meets the standard, NO2-N accumulation is not generated, and carbon source dosing excess is not generated.

The invention relates to the technical field of sewage treatment, in particular to a water body biotoxicity early warning system based on self-sustaining of denitrifying microorganisms. The early warning system comprises an early warning device, an early warning filtering system located at the front end of the early warning device, a nitrate nitrogen monitor located at the rear end of the early warning device, a carbon source storage tank used for storing a carbon source and a nitrate nitrogen storage tank used for storing nitrate nitrogen. The nitrate nitrogen monitoring instrument is used for monitoring the change of the concentration of nitrate nitrogen, so that the toxicity detection and early warning of inlet water are realized. The water body biotoxicity early warning system is arranged based on denitrifying bacteria, through the biofilm filler, the early warning system is high in impact resistance and better in stability in the use process, and meanwhile, the system is more stable and reliable in the use process in cooperation with a corresponding filtering-backflushing system, a filler stirring and flushing system and a parallel system; and the device is convenient to use and maintain, is more suitable for actual production, and has wide application and popularization prospects.

The invention discloses an iron-sulfur-carbon-based composite filler for removing florfenicol in tail water, and belongs to the technical field of water treatment materials. The composite filler is composed of charcoal, pyrite, a calcium base, a binder and zeolite in proportion, through the synergistic effect of all the components, an adsorption-reduction-degradation combined mechanism is achieved, and florfenicol in municipal tail water and aquaculture tail water is efficiently removed. The preparation method comprises the steps of ingredient mixing, roller granulation, maintenance forming and the like, is simple in process and low in cost, and can be used for recycling preparation of agricultural and mine wastes. The filler is suitable for constructed wetlands and other water treatment scenes, the removal rate of florfenicol reaches 80% or above, meanwhile, the filler has the removal effect on nitrate nitrogen and other pollutants, and wide application prospects are achieved.

This invention discloses a start-up method for a sulfur autotrophic activated sludge process, comprising: inoculation of activated sludge; internal circulation of activated sludge; a first stage of sulfur autotrophic denitrification acclimatization, wherein the supernatant recirculation ratio of the first stage is ≥400%, and the influent flow rate of nitrate nitrogen wastewater is ≤40% of the design flow rate; a second stage of sulfur autotrophic denitrification acclimatization, wherein the supernatant recirculation ratio of the second stage is greater than or equal to the supernatant recirculation ratio of the first stage; and a third stage of sulfur autotrophic denitrification acclimatization, wherein the supernatant recirculation ratio of the third stage is greater than or equal to the supernatant recirculation ratio of the second stage. The start-up procedure ends after the effluent nitrate nitrogen removal rate reaches the required level. According to the method of this invention, by combining a high proportion of recirculation with low load and low influent nitrate nitrogen wastewater, sufficient agitation of the sludge can be achieved, improving the proliferation rate of sulfur autotrophic denitrifying microorganisms while avoiding sludge loss, thus enabling rapid start-up in UASB denitrification denitrification units with a small to medium aspect ratio.

The present application relates to a kind of sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier and its preparation method and application, belong to water deep processing field.The sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier includes matrix material and active material distributed in the inside and / or at least part of surface of the matrix material;The matrix material includes elemental sulfur and sulfur compound;The active material includes basic magnesium-containing compound and / or mineral containing basic magnesium-containing compound.The sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier has the ability of easy-to-use sulfur form by denitrification process and automatic adjustment system pH value, realizes deep denitrification and nitrogen removal, and the dissolved magnesium ion is transported into cell by improving ammonia nitrogen efficiency and forms phosphate precipitate, and the carrier is endowed with the function of efficient removal of ammonia nitrogen and phosphate.The sulfur-based basic magnesium-containing functional material provided by the present application is applied to deep processing or ecological buffer zone and other scenes, and can realize the coordinated deep removal of nitrate nitrogen, ammonia nitrogen and phosphate, and has wide application prospect.

This invention provides a method for tracing the source of nitrate nitrogen in surface water using microbial fingerprinting, comprising: collecting surface water samples from a target watershed to obtain water samples; determining the nitrogen isotope ratio and oxygen isotope ratio of the water samples; sequencing the microbial barcodes of the water samples; calculating the contribution rate of different nitrogen pollution source groups based on the nitrogen and oxygen isotope ratios using a Bayesian isotope mixture model, and grouping the contribution rates of different nitrogen pollution sources; calculating different indicator species indices for each group using the R language indicespecies package to screen indicator species, and constructing a nitrogen pollution source microbial map based on the microbial barcodes; and obtaining the microorganisms indicating the sources of nitrogen pollution in surface water based on the nitrogen pollution source microbial map. This invention improves the accuracy of source tracing while reducing costs.

The utility model provides a dual-light-source deep ultraviolet miniature optical nitrate nitrogen turbidity sensor, which solves the problem that turbidity particles can interfere with an ultraviolet absorption spectrum of nitrate nitrogen and influence the detection accuracy in the prior art. A dual-light-source deep ultraviolet miniature optical nitrate nitrogen turbidity sensor comprises a detection cavity, and a light-emitting assembly and a receiving assembly are arranged on the two sides of the detection cavity; a deep ultraviolet light source emitter and a turbidity light source emitter are arranged in the light emitting assembly, a deep ultraviolet light source receiver and a turbidity light source receiver are arranged in the receiving assembly, the deep ultraviolet light source receiver is arranged opposite to the deep ultraviolet light source, and the turbidity light source receiver is arranged opposite to the turbidity light source. As the measurement result of the nitrate nitrogen is possibly interfered by the turbidity of the water body, the sensor can measure the turbidity of the water body firstly by integrating the turbidity light source and the receiver of the turbidity light source, and correspondingly compensate the measurement result of the nitrate nitrogen so as to reduce the interference of the turbidity on the measurement of the nitrate nitrogen.