593 results about "Nitrite salt" patented technology

The invention belongs to the technical field of wastewater denitrification treatment, and particularly relates to an anaerobic ammonia oxidation reaction-based integrated partitioned denitrification method which comprises the following steps: S1, removing high-concentration organic matters and suspended matters in wastewater through coagulating sedimentation or chemical oxidation pretreatment to avoid inhibition on subsequent Anammox; s2, partitioning the integrated reactor, and setting a short-cut nitrification region and an Anammox reaction region; s3, enabling the effluent part of the Anammox reaction zone to flow back to the short-cut nitrification zone, supplementing nitrite and balancing the carbon nitrogen ratio; the Anammox granular sludge flows back to the reaction zone through the settling zone, and the biomass concentration and the reaction efficiency are maintained; s4, a secondary sedimentation tank or a built-in sedimentation zone is arranged to achieve mud-water separation, residual sludge is discharged, and it is guaranteed that effluent reaches the standard, and it is guaranteed that the denitrification efficiency is stable by dynamically adjusting dissolved oxygen of the short-cut nitrification zone and the pH value of the Anammox reaction zone.

The invention discloses a high-activity short-cut nitrification quick-start long-term stable operation process, which relates to the technical field of biological sewage treatment, and comprises the following steps: inoculating sludge, carrying out anaerobic fermentation pretreatment, and removing expanded sludge and sludge foam in combination with quick sludge discharge and manual removal; controlling the number of days of sludge age, reproliferating the sludge, enriching ammonia oxidizing bacteria, and inhibiting and elutriating nitrite oxidizing bacteria; long-term operation is carried out under the condition of no sludge discharge, the abundance and activity of ammonia oxidizing bacteria are maintained, and meanwhile, the abundance of nitrite oxidizing bacteria is controlled; the proliferation of nitrite oxidizing bacteria is controlled by using the predation effect of protozoa and metazoan, and the accumulation rate of nitrite in the reactor is controlled; monitoring the dissolved oxygen, the pH value and the concentrations of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the reactor in real time, and regulating and controlling the influent ammonia nitrogen load and the free ammonia concentration; dissolved oxygen distribution is adjusted in an intermittent aeration or microporous aeration mode, and the operation conditions of the short-cut nitrification reactor are optimized. The method is simple to operate, economical and effective.

The invention provides a low C / N sewage nitrogen and phosphorus removal method based on MABR-DPR-anaerobic ammonia oxidation, which couples anaerobic, membrane aeration anoxic and anaerobic ammonia oxidation processes, forms an anoxic environment in a water phase of a membrane aeration reactor, and enriches denitrifying phosphorus-accumulating bacteria. And the anaerobic phosphorus release and anoxic denitrification nitrogen and phosphorus removal processes of the denitrifying phosphorus-accumulating bacteria are realized through the backflow of the sludge between the anaerobic tank and the membrane aeration reactor. Nitrite accumulated in effluent of the membrane aeration reactor supplements an electron acceptor for a subsequent anaerobic ammonia oxidation deep denitrification process, and meanwhile, a carbon source is obviously consumed in an anoxic denitrification nitrogen and phosphorus removal process of the membrane aeration reactor, so that inhibition of influent organic matters on an anaerobic ammonia oxidation process is effectively weakened. The process solves the problem that the carbon source is seriously insufficient in the nitrogen and phosphorus removal process of the low C / N sewage, and the stable and efficient nitrogen and phosphorus removal effect can still be maintained under the condition that an external carbon source is not needed.

The invention discloses a compound yeast agent for anaerobic degradation of biodegradable plastics. The compound yeast agent comprises the following components in percentage by mass: 0.5-3% of fenpropathrin, 1-6% of nitrite, 1-4% of ammonium molybdate, 5-10% of PLA, 5-10% of nano starch, 3-6% of nano calcium carbonate, 1-5% of carbamide and the balance of a biodegradable resin carrier. The production method comprises the following steps: 1, dispersion treatment; 2, centralization processing; 3, carrying out structured treatment; 4, carrying out carrier implantation treatment; and 5, plasticizing and granulating. The compound yeast agent is added into the plastic, and the addition amount is 1-5%, so that the anaerobic degradation plastic is formed. According to the invention, anaerobic degradation can be regulated and controlled, and more importantly, anaerobic degradation also realizes that the degradable plastic disclosed by the invention is in a normal use condition, the plastic cannot be degraded quickly in light and oxygen environments, the aging property of the plastic is equivalent to that of a resin matrix of the plastic, and the physical and mechanical properties are ensured.

The invention discloses a nitrifying bacterium agent suitable for aquarium, fishpond and other aquatic industries, the strain of the nitrifying bacterium agent is Glutamicacter nicotianae TJ-X, the nitrifying bacterium agent is preserved in Guangdong Microbial Culture Collection Center on February 12, 2025, and the preservation number is GDMCC NO.65877. The invention further discloses a preparation method of the nitrifying bacterium agent. The nitrifying bacteria TJ-X strain suitable for the aquarium industry can perform heterotrophic nitrification and aerobic denitrification under the condition that the salt content is 5wt%, under the condition of laboratory pure culture, within 8 hours, the removal rate of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen is 99% or above, the COD degradation rate is 81%, the nitrifying bacteria TJ-X strain is suitable for the environment where organic matter, ammonia nitrogen, nitrite and nitrate coexist, and the nitrifying bacteria TJ-X strain can be applied to the aquarium industry. The microbial agent has the functions of degrading organic matters such as excrement of ornamental fish and fish food, converting organic nitrogen into inorganic nitrogen, and simultaneously degrading inorganic nitrogen such as ammonia nitrogen, nitrite nitrogen and nitrate nitrogen into nitrogen. And the strain is high in biological safety, high in environmental adaptability and high in growth density, can be applied to water industries with high organic matter content and inorganic nitrogen, such as the aquarium industry and aquaculture, and has a wide application prospect.

The invention relates to a preparation method and application of polysaccharide-based fluorescent carbon quantum dots with adjustable emission wavelength, and belongs to the technical field of preparation of fluorescent carbon nanomaterials. Polysaccharide is respectively mixed with different nitrogen dopants o-phenylenediamine, m-phenylenediamine and p-phenylenediamine, then the mixture is subjected to a hydrothermal reaction to respectively prepare blue, green and yellow green fluorescent carbon quantum dots, and then the blue, green and yellow green fluorescent carbon quantum dots are applied to nitrite detection. The carbon quantum dots with different emission wavelengths and different colors are obtained by adjusting the types of the nitrogen doping agents, the problems that the emission wavelengths of the carbon quantum dots cannot be adjusted and the range is narrow are solved, and reference is provided for subsequent design and opening of the generator-based multicolor fluorescent carbon quantum dots. Meanwhile, the biological polysaccharide is used as a raw material, deionized water is used as a solvent, the whole technological process is easy to operate and low in cost, and the method has far-reaching significance on further high-value utilization of biomass resources and promotion of sustainable utilization of the biomass resources.

The invention relates to a preparation method of a multi-site silver (Ag) and nickel hydroxide (Ni (OH) 2) modified copper (Cu) nanowire catalyst (Ag-Ni (OH) 2) / Cu NW) and application of the multi-site silver (Ag) and nickel hydroxide (Ni (OH) 2) modified copper (Cu) nanowire catalyst. A cation exchange and electrodeposition method is adopted to prepare an electrocatalytic nitrate reduction reaction NO3-RR series catalyst with three sites of Ag, Ni (OH) 2 and Cu. Based on the synergistic effect of three sites, Ag in the catalyst promotes conversion from nitrate NO3 <-> to nitrite NO2 <->, Ni (OH) 2 promotes dissociation of water H2O to generate free hydrogen * H, Cu atoms near Ni (OH) 2 accelerate conversion from NO2 <-> to ammonia NH3, and the efficient series catalytic process is achieved. Under the condition of-0.1 V vs. Reversible hydrogen electrode RHE in a 1M potassium hydroxide solution containing 50 mM of potassium nitrate, the NH3 yield of 4.01 mgh <-1 > cm <-2 > and the NH3 Faraday efficiency of 97.3% are obtained, under the condition of 0V vs. RHE, the excellent energy efficiency of 46.5% is achieved, the excellent catalytic activity is kept in a NO3 <-> solution with the wide concentration, and the good sewage treatment capacity is achieved. The invention provides a new design thought for tandem catalysis, and has a wide application prospect in the field of NO3-RR.

The invention relates to the technical field of aquaculture, in particular to an aquaculture water environment repairing agent and a preparation method thereof, and the repairing agent is composed of a modified biochar composite material, chlorella microspheres, a cross-linking agent and a microbial compound inoculant. The modified biochar composite material is prepared through the steps of mixing attapulgite and biomass raw materials, performing acid activation, performing pyrolysis and the like, and tannic acid is used for further modification so as to enhance the adsorption capacity; the chlorella microspheres are prepared from sodium alginate and a CaCl2 solution, and have good suspension property and stability; the microbial complex microbial inoculant contains various beneficial bacteria, and can decompose organic matters and reduce the content of ammonia nitrogen and nitrite; the components of the repairing agent are combined through the cross-linking agent to form particles, so that the repairing agent is convenient to put and recycle. The repairing agent disclosed by the invention has efficient pollutant removal capacity, and can be used for remarkably improving the water quality of aquatic water, improving the transparency of the water, increasing dissolved oxygen and promoting the health and stability of an aquatic ecosystem.

The disclosure relates to a method of producing a multi-metal catalyst film and of producing a reactor system for catalytic removal of a wide variety of contaminants (for example, nitrate, nitrite, perchlorate, chlorate, chromate, selenate, chlorophenols, 2,4-D, dicamba, atrazine, trichloroacetic acid, bromochloroiodomethane, NDMA, TCE, TCA, chloroform, freons, RDX, HMX, TNT, PFOA, and PFOS) from water and wastewater. The disclosure also relates to a method of using the multi-metal catalyst for the removal of such contaminants and a system comprising the multi-metal catalyst film for removing such contaminants.

Systems and methods for producing ammonium nitrate are disclosed herein. Exemplary systems can comprise a bioreactor positioned to receive a feed including ammonia. The bioreactor can hold a liquid solution including (i) an ammonia oxidizing bacteria (AOB) and (ii) a nitrite oxidizing bacteria (NOB). The AOB can facilitate oxidation of the ammonia to produce a nitrite at a nitritation rate and the NOB can facilitate oxidation of the nitrite at a nitratation rate. Thus, the bioreactor can produce a mixed liquor comprising a nitrate biologically. The system can further comprise a filter positioned to receive the mixed liquor and produce a permeate and a sludge. A sensor can measure the concentration of the liquid solution of the bioreactor, and a controller coupled to the sensor can regulate the mass flow of nitrogen and / or phosphorus of the bioreactor feed based on the measured concentration of the liquid solution.

The invention belongs to the field of industrial wastewater treatment, and relates to an iron autotrophic denitrification coupling anaerobic ammonia oxidation combined enrichment culture device and method. Comprising a water inlet tank, a No.1 anoxic reactor, an intermediate tank and a No.2 anaerobic reactor, the water inlet tank is provided with a water outlet pipeline of the water inlet tank, and the water outlet pipeline of the water inlet tank is connected with the No.1 anoxic reactor; the anoxic reactor I is provided with a water outlet pipeline of the anoxic reactor I, and the water outlet pipeline of the anoxic reactor I is connected with the intermediate tank; the intermediate tank is provided with an intermediate tank water outlet pipeline, and the intermediate tank water outlet pipeline is connected with the No.2 anaerobic reactor; the No.2 anaerobic reactor is provided with a No.2 anaerobic reactor water outlet pipeline; the No.2 anaerobic reactor water outlet pipeline is connected with the No.1 anoxic reactor. According to the invention, collaborative culture of autotrophic denitrification bacteria and anaerobic ammonium oxidation bacteria can be realized, an autotrophic denitrification effect provides a certain amount of nitrite and iron ions to promote anaerobic ammonium oxidation reaction, and an anaerobic ammonium oxidation effect can effectively prevent an autotrophic denitrification tank body from being mineralized.

The invention relates to a nitride concentration quantitative analysis method based on a relative position matrix method and a Raman spectrum, and belongs to the field of Raman spectrum quantitative analysis. The method comprises the following steps: collecting Raman spectrum data of a sample through a Raman spectrometer, and establishing a Raman spectrum data set; carrying out smoothing and baseline deduction on the Raman spectrum data set, and carrying out data enhancement and data normalization on the data set; performing two-dimensional conversion on the preprocessed data set by using a relative position matrix method; training a multi-modal fusion neural network model based on the original one-dimensional spectral data and the converted two-dimensional image data; and quantitatively detecting the concentrations of nitrate and nitrite in water by using the trained model. The Raman spectrum and the relative position matrix method are combined, quantitative detection of the nitride concentration in the water sample is achieved, and technical support is provided for large-scale application of the Raman spectrum in actual water sample detection.

The invention belongs to the technical field of food processing, and particularly relates to fermented beef jerky and a preparation method thereof. The preparation method of the beef jerky comprises the following steps: (1) removing fascia and fat from fresh cattle hind leg meat, washing with clear water, and cutting into meat slices; (2) adding table salt, glucose, white granulated sugar and sodium nitrite into the sliced meat, uniformly mixing, adding a fermentation inoculant which comprises staphylococcus calcaratus, pediococcus acidilactici, bifidobacterium bifidum and Witzia ciliaris, and fermenting; and (3) after fermentation, drying and cooling to obtain the fermented beef jerky. Specific strains are selected to form a fermentation inoculant for fermentation, and the prepared fermented beef jerky is high in free amino acid and soluble peptide content, low in nitrite residual quantity, uniform red brown in color and slightly bright in surface, and belongs to high-quality beef jerky.

The application discloses a method for efficient denitrification and decarburization of kitchen waste and sludge co-fermentation anaerobic digestion effluent, which removes part of COD and ammonia nitrogen in the influent sludge by using a first SNAD, and maintains a certain amount of free ammonia of a certain concentration due to the high concentration of ammonia nitrogen and the high pH of the influent, so as to maintain the inhibition effect on nitrifying bacteria and ensure the conversion of part of the ammonia nitrogen into nitrite nitrogen, and the high activity of anaerobic ammonia oxidation bacteria is ensured in the first SNAD by limiting the aeration amount, so that the ammonia nitrogen and nitrite can be further removed; the effluent enters a nitrification tank, and the ammonia nitrogen is nitrified into nitrate nitrogen under the condition of nitrifying bacteria and sufficient aeration amount, and then enters a denitrification tank, and the denitrification process is carried out under the condition of heterotrophic denitrifying bacteria and sufficient carbon source, so that most of the nitrate nitrogen in the system is converted into nitrogen gas and removed, finally, the clear liquid is discharged after being filtered by an MBR membrane in a membrane tank, so as to achieve the purpose of efficient denitrification and decarburization of kitchen waste anaerobic digestion effluent.

The invention relates to copper-modified wheel-type tungsten phosphate, a preparation method of the copper-modified wheel-type tungsten phosphate and application of the copper-modified wheel-type tungsten phosphate in production of ammonia through electro-catalysis of nitrite reduction, and provides the copper-modified wheel-type tungsten phosphate, the preparation method of the copper-modified wheel-type tungsten phosphate and application of the copper-modified wheel-type tungsten phosphate in production of ammonia through electro-catalysis of nitrite reduction. According to the invention, the transition metal copper is introduced on the basis of K28Li5 [H7P8W48O184] 92H2O (hereinafter referred to as P8W48). K12Li13 [Cu20Cl (OH) 24 (H2O) 12 (P8W48O184)]. 22H2O (hereinafter referred to as Cu20P8W48) is formed through self-assembling and positioning, and the K12Li13 [Cu20Cl (OH) 24 (H2O) 12 (P8W48O184)]. 22H2O is applied to reduction of nitrite through electro-catalysis to prepare ammonia.

The invention relates to the technical field of wastewater treatment or water quality purification, in particular to a method for synchronously culturing ammonia oxidizing bacteria and nitrite oxidizing bacteria, which comprises the following steps: selecting an inorganic material which is large in specific surface area and can quickly neutralize and release alkalinity as a nitrifying bacteria attachment carrier and an alkalinity supplement / pH regulator; the carrier is dissolved through nitration acid production, carbon dioxide and alkalinity are released, a carbon source and alkalinity required by growth are provided for nitrifying bacteria, and propagation of the nitrifying bacteria is promoted. Ammonia oxidizing bacteria and nitrite oxidizing bacteria are cultured synchronously by controlling the growth speed of the two bacteria in the culture process. By controlling the ammonia nitrogen concentration and nitrite concentration of the effluent at the end of culture to be lower than 50mg / L, sufficient time is provided for nitrite oxidizing bacteria to decompose an intermediate product nitrite, so that the purpose of simultaneously culturing AOB and NOB is achieved.

The invention provides a self-circulation water quality purification system which comprises a culture space body and a self-circulation purification system, the self-circulation purification system comprises a hollow flow guide box, a water pump, an anti-blocking cotton layer and a control device, the water pump is arranged in the flow guide box, and the flow guide box is arranged at the bottom of an inner cavity of a fish tank body; a water seepage guide plate is formed at the top of the guide box; the anti-blocking cotton layer is arranged on the upper surface of the water seepage guide plate; a fungus bed layer is laid on the upper surface of the anti-blocking cotton layer; a plurality of leaking holes are formed in the surface of the water seepage guide plate; a plurality of clapboards are arranged between the lower surface of the seepage guide plate and the bottom of the inner cavity of the guide box; one side of each partition plate in the width direction is connected with one inner side wall of the diversion box, and a gap is formed between the other side of each partition plate in the width direction and the inner side wall of the diversion box. And the microbial flora can obtain the maximum digestion nutrition due to the comprehensive and stable water flow, so that harmful substances such as ammonia, nitrogen, nitrate and nitrite in water are eliminated, meanwhile, hydrogen sulfide is avoided, and a good water purification function can be maintained.

The utility model belongs to the field of environmental protection and water resource recycling, and particularly relates to an eel breeding tail water purifying and recycling system. The eel breeding tail water purification and cyclic utilization system comprises a pretreatment device, a clear water purification and circulation device and a concentrated water treatment device, the pretreatment device comprises an anaerobic sedimentation tank and a filter I which are communicated in sequence, and the clear water purification and circulation device comprises a hydrolysis acidification tank, a denitrification bed I, an adsorption phosphorus removal bed I and a biological activation tank group which are communicated in sequence; the concentrated water treatment device comprises an air floatation tank, a filter II, a denitrification bed II and an adsorption dephosphorization bed II which are communicated in sequence, a clear water outlet of the filter I is communicated with a water inlet of the hydrolysis acidification tank, and a concentrated water outlet of the filter I is communicated with a water inlet of the air floatation tank. By the adoption of the system, accumulation of nitrogen, phosphorus and nitrite during cyclic utilization of the eel tail water can be reduced, the investment and operation cost is low, and actual application and popularization are facilitated.

The invention relates to the technical field of water treatment, and discloses a sludge quality-divided reflux type aerobic-anoxic sulfur autotrophic activated sludge denitrification process. The process comprises the following steps: wastewater enters a sectional type aerobic tank, the wastewater enters the sectional type aerobic tank, organic matters are removed in a strengthened manner in a first section of aerobic tank, part of ammonia nitrogen is converted into nitrite nitrogen and nitrate nitrogen, and nitrification is strengthened in a second section of aerobic tank, so that the ammonia nitrogen is deeply removed; effluent of the sectional type aerobic tank enters an anoxic tank and is completely mixed with sulfur particles and activated sludge for sulfur autotrophic denitrification; effluent of the anoxic tank enters a secondary sedimentation tank for sedimentation, supernate is discharged, and bottom mud enters a hydrocyclone to be divided into heavy sludge and light sludge; the heavy sludge flows back to the front end of the anoxic tank, the light sludge flows back to the front end of the sectional aerobic tank, and the remaining sludge is discharged. According to the invention, sulfur autotrophic denitrification is deeply integrated into an activated sludge system, so that high-efficiency nitrogen removal without carbon source and internal reflux is realized.

The invention discloses a composite early-strength anti-freezing water reducing agent and a preparation method thereof. The composite early-strength anti-freezing water reducing agent comprises the following components: nitrate or nitrite, an alcohol anti-freezing component, alcohol amine, polycarboxylic acid high-performance water reducing agent mother liquor, a polyether air entraining agent and water. The method comprises the following steps: adding water into production equipment, sequentially adding nitrate or nitrite, methanol, ethylene glycol, hydramine and the polycarboxylic acid high-performance water reducing agent mother liquor, uniformly stirring, and discharging to obtain the product. The invention has the following advantages: the dosage form is a water agent, dust pollution is avoided, occupational health and safety of practitioners are protected, the labor cost of feeding is saved, the early-strength anti-freezing component and the water-reducing component are compounded together, and the water-reducing rate and concrete anti-freezing critical strength specified by national standards and industrial standards are reached under the condition that the dosage is determined, so that the dosage is reduced; the product can resist low temperature of-20 DEG C without crystallization, is not layered after being placed for a long time, and has no precipitate.

The invention provides a betahistine hydrochloride pharmaceutical preparation and a preparation method thereof. The betahistine hydrochloride pharmaceutical preparation comprises conjugated linoleic acid, betahistine hydrochloride and auxiliary materials. Conjugated linoleic acid and betahistine hydrochloride are combined together for the first time, and conjugated double bonds of conjugated linoleic acid can be specifically combined with nitrite to block the generation of nitrosamine, so that the content of N-nitrosobetahistine can be remarkably reduced. Based on the chemical characteristics of conjugated linoleic acid, conjugated linoleic acid is used as a functional additive, targeted removal of nitrosamine impurities is achieved, and meanwhile the situation that exogenous toxic substances are introduced to affect the drug effect of betahistine hydrochloride is avoided. In the experiment process, it is also accidentally found that after the conjugated linoleic acid is added, the positive effect on cerebrovascular diseases is also achieved.

The invention discloses an autotrophic nitrogen removal and detoxification device and method for treating coking wastewater through two-stage low-oxygen short-cut nitrification, sulfur autotrophic denitrification and anaerobic ammonia oxidation, and belongs to the field of sewage treatment. The device comprises a water inlet tank, a sequencing batch reactor, a middle water tank and an up-flow anaerobic sludge blanket reactor. The method comprises the following steps: enabling the coking wastewater which is subjected to carbon capture and contains ammonia nitrogen and thiocyanate to enter a sequencing batch reactor, oxidizing the ammonia nitrogen into nitrite under a limited oxygen condition, and generating nitrogen, sulfate and ammonia nitrogen from the thiocyanate and the nitrite by autotrophic denitrifying bacteria; reaction effluent mixed with coking wastewater enters an upflow anaerobic sludge blanket, and anaerobic ammonium oxidation bacteria convert ammonia nitrogen and nitrite into nitrogen and generate a small amount of nitrate; and the residual nitrate, nitrite and thiocyanate are continuously and thoroughly removed through the sulfur autotrophic denitrification effect. The method provides a new idea for economical and efficient autotrophic nitrogen removal and detoxification of the coking wastewater containing thiocyanate and ammonia nitrogen.

The technical scheme of the utility model discloses a land-based canvas pool litopenaeus vannamei recirculating aquaculture system which comprises an aquaculture pool, and the edge of the bottom of the aquaculture pool inclines towards the center so as to enable aquaculture water and impurities to converge towards the center to a fish closestool. The settling pond is connected with an outlet of the fish closestool through a drainage pipe, and the fluidized bed is connected with the settling pond through a water guide pipe arranged at the water outlet channel; and the microfiltration part is connected with the fluidized bed and the culture pond through a water conduit and a water return pipe respectively. The bottom of the culture pond is inclined, water is drained from the center of the culture pond and enters the culture pond tangentially, so that vortexes are formed in the culture pond, and residual feed, excrement and the like are quickly concentrated towards the water outlet in the center of the bottom of the culture pond under the action of tangential force of water flow. Through a plurality of water inlet pipes and water outlet pipes, the effect of water quality circulation of the culture pond, the sedimentation pond, the fluidized bed biological filter and the rotary drum type micro-filter is achieved, and the problems that suspended solids and ammonia nitrogen are prone to being generated in a traditional prawn culture technology and the nitrite concentration is continuously increased are solved.

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 relates to the technical field of sea flux monitoring, in particular to a pollutant sea flux monitoring and predicting method based on deep learning. The method comprises the following steps: collecting historical flow and pollutant concentration data of a target area according to different time intervals, and locking an area to be analyzed according to the historical flow and pollutant concentration data; then obtaining a regional water sample, extracting concentration and flow data of nitrite, ammonia nitrogen and nitrate, and constructing a training set; after the training set and the real-time flow test set are standardized, deep time sequence learning is carried out through a TCN model, and the future flow and the concentration of each pollutant are predicted; and finally, calculating the into-sea flux based on a prediction result, and realizing high-precision pollutant into-sea flux monitoring and forecasting. According to the method, deep causal convolution and residual feature extraction are performed on long-time sequence data by using the time sequence convolution network, so that the prediction precision and efficiency of the pollutant into-sea flux under complex terrains, extreme climates and human activity dense areas are improved.

The pure membrane MBBR sewage treatment system comprises an anoxic denitrification zone, an anaerobic ammonia oxidation zone, an aerobic oxidation zone, a high-density sedimentation zone, an MBBR biological filtration zone, a backwashing water tank and an equipment room, the anoxic denitrification region is used for carrying out amination reaction, organic matter hydrolysis reaction and denitrification reaction on the sewage and nitrate and nitrite in the anoxic denitrification region; the anaerobic ammonia oxidation zone is used for reacting the sewage with nitrite to generate nitrogen; the aerobic oxidation zone is used for promoting microorganisms to degrade organic matters in sewage and convert ammonia nitrogen; the high-density settling zone is used for separating muddy water in sewage; the MBBR biological filtration area is used for filtering suspended matters in the sewage; the backwashing water tank is used for providing backwashing make-up water for the MBBR biological filtration area; and the equipment room is used for placing disinfection equipment, a fan and a power distribution control system.

The invention discloses a percolate treatment method based on a microalgae coupling nitration process, and belongs to the field of wastewater biological treatment and intelligent control, and the method comprises the following steps: constructing initial reaction conditions suitable for microalgae proliferation and nitration reaction; operating parameters such as ammonia nitrogen concentration, nitrite concentration, dissolved oxygen, temperature and microalgae concentration are collected to form real-time operating data; based on the weighted multi-parameter fitting relationship, calculating an optimal combination of the illumination intensity, the carbon source feeding rate, the cycle ratio and the reaction duration; when the ammonia nitrogen removal rate is continuously lower than a threshold value, calling historical data to carry out trend analysis, and dynamically correcting a fitting weight; applying the correction result to control the illumination condition and the water inlet and outlet proportion; after the operation cycle is finished, updating the fitting model by adopting an incremental learning mode to realize continuous optimization of the control strategy; according to the invention, the nitrogen element removal efficiency of the percolation liquid and the system stability are improved, and the self-adaptive adjustment capability is relatively strong.

The invention discloses a method for realizing deep autotrophic nitrogen removal of sludge digestion liquid based on alternate intermittent aeration of a double-membrane aeration bio-membrane reactor (MABR). The process device comprises a sludge digestion liquid raw water tank, a single-stage double-MABR reactor, two MABR devices and a water outlet tank. According to the method, sludge digestion liquid enters the single-stage double-MABR reactor, the two MABR devices are alternately and intermittently aerated, the state of one aeration and one aeration stopping is always kept, and ammonia nitrogen in raw water is converted into nitrite through ammonia oxidizing bacteria enriched on the inner side of an MABR membrane. And simultaneously supplying to anaerobic ammonium oxidation bacteria enriched on the outer sides of the two MABR membranes through matrix diffusion for denitrification and generation of nitrate. Denitrifying bacteria enriched on the outer side of the MABR membrane utilize raw water organic matters to drive short-cut denitrification to synchronously supply nitrite to anaerobic ammonium oxidation bacteria so as to realize deep autotrophic nitrogen removal. According to the invention, a double-anaerobic ammonia oxidation reaction hot area is constructed through alternate intermittent aeration of double MABRs, and efficient deep autotrophic nitrogen removal of the sludge digestion liquid can be stably realized.

The invention discloses a microorganism, a microbial agent, food, a method for preparing the food and a method for producing pectinase, and relates to the field of microorganisms. The microorganism is plant lactobacillus, and the preservation number of the microorganism is CGMCC (China General Microbiological Culture Collection Center) No.31283. The new strain of the plant lactobacillus obtained through screening has the advantages of being high in growth speed, high in acid production capacity, acid resistance and salt resistance, high in pectinase production capacity, high in nitrite and nitrate metabolism capacity and the like; the new strain is used for developing salt-reduced fermented food, the process adaptability is good, and the prepared fermented food is rich in lactic acid bacteria content, nutritional, healthy and unique in flavor; a food fermentation process developed by utilizing the new strain is high in fermentation efficiency, short in production period and high in application value.

The invention provides a domestic sewage treatment method and system based on shortcut nitrification and anaerobic ammonia oxidation of Anammox bacteria preposed alkali reduction, and relates to the technical field of sewage treatment. The method comprises the following steps: anaerobic treatment: converting an organic suspended solid into an easily degradable carbon source through hydrolytic acidification bacteria; the carbon source is absorbed by denitrifying phosphorus-accumulating bacteria and denitrifying glycogen-accumulating bacteria and is stored as an intracellular carbon source; primary anoxic treatment: reacting ammonia nitrogen with nitrite through Anammox bacteria, and synchronously reducing alkalinity; aerobic treatment: under the condition of low alkalinity, in combination with low dissolved oxygen control, Comamox bacteria oxidize ammonia nitrogen into nitrite and accumulate the nitrite; and secondary anoxic treatment: denitrifying residual oxidation nitrogen into nitrogen by using intracellular carbon through denitrifying glycogen-accumulating bacteria. Through the synergistic effect of the hydrolytic acidification bacteria, the denitrifying phosphorus-accumulating bacteria, the Anammox bacteria, the Commox bacteria and the denitrifying glycogen-accumulating bacteria, efficient nitrogen and phosphorus removal is realized.