47 results about "Nitrite oxidation" patented technology

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 present invention discloses a Nitrospira The invention relates to nitrite oxidizing bacteria and their applications, belonging to the field of microbial and environmental protection technology. The strain is named Nitrospira sp. Z02, with a deposit number of GDMCC No: 66050, and was deposited in Guangdong Provincial Microbial Culture Collection Center on March 25, 2025. The strain is a new species, belongs to chemoautotrophic type, and expands Nitrospira The strains are diverse and can oxidize nitrite under different oxygen concentrations, have good adaptability to oxygen concentrations, retain oxidation activity within the pH range of 5.5 to 8.5, and can tolerate weakly acidic conditions. They can grow on solid plates and have the potential for molecular modification. Therefore, this strain has good application value in the treatment of nitrite-containing wastewater.

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 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 device and a method for short-cut nitrification / anaerobic ammonia oxidation high-rate denitrification of low-ammonia-nitrogen wastewater in a tropical region, belongs to the technical field of biological sewage treatment, and is used for treating the low-ammonia-nitrogen wastewater in the tropical region. The device comprises a water inlet tank, a double-zone bioreactor and a water collecting tank. The method comprises the following steps: pre-treating floc sludge in a reactor by adding hydroxylamine and controlling sludge age, so as to keep the activity of ammonia oxidizing bacteria and inhibit the activity of nitrite oxidizing bacteria at the same time; after pretreatment, anaerobic ammonia oxidation granular sludge is inoculated into the reactor, and aeration is performed at the upper part of the reactor to provide an aerobic environment for ammonia oxidizing bacteria in floc sludge; the granular sludge is settled at the lower part of the reactor, and nitrite generated by floc sludge at the upper part flows back to the lower part, so that anaerobic ammonia oxidation denitrification is realized. The two functional microorganisms are placed in respective appropriate environments, so that the growth of nitrite oxidizing bacteria can be controlled, the short-cut nitrification / anaerobic ammonia oxidation rate is increased, and the high-rate denitrification of the low-ammonia-nitrogen wastewater is realized.

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

The invention provides a bissanthin aromatic ring bay region C-H nucleophilic substitution reaction method and application thereof, and belongs to the field of organic synthesis methodology. According to the reaction, bissanthin is used as a raw material, dichloromethane and acetonitrile are used as solvents, and the bissanthin is oxidized by nitrite hexafluorotellurate and respectively reacts with nucleophilic reagents such as carbon anions, oxygen-containing reagents, sulfur-containing reagents, chlorine-containing reagents, nitrogen-containing reagents, phosphorus-containing reagents and cyano groups in one step to synthesize a series of bissanthin bay area modified functionalized products; when the reaction method is further applied to the nucleophilic substitution reaction of two molecules, namely perylene (Perylene) and N, N '-di (1, 3-diisopropyl benzene)-3, 4, 9, 10-perylene dicarboximide (PDI), good universality is shown, and the reaction method can be applied to the nucleophilic substitution reaction of two molecules, namely perylene (Perylene) and N, N'-di (1, 3-diisopropyl benzene)-3, 4, 9, 10-perylene dicarboximide (PDI). The method is mild in reaction condition, does not need to introduce transition metal as a catalyst, is easy in product separation and purification, and has the advantages of low cost, high efficiency and greenness; the series of functionalized derivatives constructed by the method can provide important intermediates for synthesis of larger polycyclic aromatic hydrocarbon molecules of the system; the method has a good industrial production prospect.

The invention discloses a method for improving resistance of activated sludge to toxic impact of composite pollutants in a nitrification process, and belongs to the technical field of multi-component composite polluted water treatment. The method comprises the following steps: respectively determining the semi-inhibitory concentration IC50 of Cu < 2 + >, CIP and nano plastic in the activated sludge nitrification process; according to the method, the concentration of bovine albumin remission liquid added into polluted wastewater is 0.5 IC50 under the background that the ammonia oxidation process and the nitrite oxidation process of PE-NPs and PBAT-NPs are IC50, and the shake-up time of bovine albumin and mixed pollutants is set to be 60-90 min. The method for relieving the toxic impact of the nano-plastic, heavy metal and antibiotic composite pollutants on the activated sludge nitrification process has the characteristics of rapidness, effectiveness, simplicity in operation, safety, harmlessness and suitability for popularization and application.

The application belongs to the technical field of electrochemical sensing, and particularly relates to an electrochemical sensing electrode with detection and anti-biofouling functions, a preparation method and application thereof. The electrochemical sensing electrode comprises a conductive substrate and a MOF-919 material loaded on the conductive substrate, and function mode switching is realized through external potential regulation. In the detection mode, a first working voltage is applied for nitrite oxidation detection; and a second working voltage is applied to release nitric oxide in situ by reducing nitrite to inhibit microbial adhesion on the electrode surface. The application does not need to additionally set an independent antibacterial layer or add an antibacterial agent, realizes the interface anti-microbial adhesion function while maintaining good electrochemical response performance of the electrode, and significantly improves the stability of long-term use in complex samples. The application provides a new technical path for anti-pollution design of an electrochemical sensing interface.

The application discloses a semi-short-cut nitrification method for middle-aged and old landfill leachate, which mainly adopts two-stage short-cut nitrification reactors to generate nitrous nitrogen, and the two-stage short-cut nitrification reactors are combined with aeration sedimentation tanks, the respective suitable process parameters and nitrite oxidation bacteria inhibition modes are controlled, and the strategy of periodically alternating the process sequence of the two-stage short-cut nitrification reactors is adopted, so that the long-term stable operation of short-cut nitrification is achieved. The method is efficient, economical, stable in operation and high in practicability.

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.

To provide a water treatment method and a water treatment apparatus capable of more appropriately and stably maintaining the generation of nitrite nitrogen in a nitritation process and more efficiently performing nitrification and denitrification treatment.SOLUTION: A water treatment method for biologically treating raw water containing a nitrite component includes a nitrite-forming step of oxidizing ammoniacal nitrogen in the raw water to nitrite-nitrogen with biosludge containing ammonia-oxidizing bacteria, a nitrite treatment step of extracting a part of the biosludge in the nitrite-forming step and bringing the extracted biosludge into contact with a nitrite aqueous solution at a pH6 of less than 0 and a nitrite-nitrogen concentration of less than 250mg - N / L for 48 hours or less to suppress activity and proliferation of the nitrite-oxidizing bacteria contained in the biosludge, and a returning step of returning the biosludge after the nitrite treatment step to the nitrite-forming step.SELECTED DRAWING: Figure 1

The invention provides a method for rapidly stabilizing and improving the denitrification efficiency of a shortcut nitrification coupled anaerobic ammonia oxidation (PN / A) system, and aims to stabilize a continuous packed fixed bed PN / A reactor in a mainstream state and improve the denitrification performance of the continuous packed fixed bed PN / A reactor at the same time. 2.0 mg N / L of free nitrous acid (FNA) and 30.0 mg N / L of free ammonia (FA) are used for treating and inhibiting nitrite oxidizing bacteria (NOB) in the system so as to reduce the concentration of nitrate nitrogen (NO3 <->-N) in effluent, and 3.0 mg N / L of FNA needs to be used for further inhibiting the nitrate nitrogen (NO3 <->-N) when the high aeration flow speed (30 mL / min) is adopted. Experiments show that by means of the method, nitrate nitrogen in effluent is reduced from 15.64 mg N / L to 3.10 mg N / L, and the total nitrogen removal rate is increased from 143.43 mg N / L / d to 589.25 mg N / L / d and is increased by 4.11 times. Besides, the reactor used in the invention is a continuous filler fixed bed reactor, so that the sewage treatment load is improved, the sludge biomass retention capability is good, the operation is simple, and the method is environment-friendly. The overall efficiency of the sewage treatment system is greatly improved, the stability of the continuous PN / A system is also improved, and the continuous PN / A system is suitable for sewage treatment scenes with efficient denitrification requirements.

The invention discloses a method for promoting growth of nitrite oxidizing bacteria, and belongs to the technical field of culture of nitrifying microorganisms in the field of environmental microorganisms. According to the method, an adsorption medium can be provided for growth of bacteria, the growth speed of the nitrite oxidizing bacteria is increased, under the condition that cationic polyacrylamide and closed cell perlite are used as culture medium additives, the growth speed of the nitrite oxidizing bacteria is remarkably increased compared with that under the condition of an original culture medium, and the production period is shortened. The method is simple to operate, low in cost and capable of theoretically reducing cost and increasing benefits, on one hand, the culture time is shortened, on the other hand, the cell density of unit volume in the culture medium is averaged due to the fact that the closed-cell perlite is low in density, thalli are adsorbed on holes of the closed-cell perlite and are easily dispersed along with flowing of culture medium liquid, and then the competitive pressure between the thalli is reduced; the thallus culture density and the thallus obtaining amount of the system are improved, and the production cost is greatly reduced compared with that of a conventional large-scale aeration stirring culture method.

The application relates to a short-range nitrification continuous flow control method and system based on free ammonia concentration analysis, wherein the free ammonia concentration of influent of an n# short-range nitrification reactor at a first reference moment is denoted as FA1; the free ammonia concentration of influent of the n# short-range nitrification reactor at a second reference moment is denoted as FA0; the FA of the n# short-range nitrification reactor meeting [FA0, FA1] is a normal standard; if the FA of the n# short-range nitrification reactor is lower than the normal standard, the system aeration amount is gradually reduced until the FA of the n# short-range nitrification reactor meets the normal standard; if the FA of the n# short-range nitrification reactor is higher than the normal standard, the system aeration amount is gradually increased. The application can maintain a high conversion rate of ammonia nitrogen in treated wastewater, significantly improve the operation stability of a short-range nitrification denitrification continuous flow reactor, gradually eliminate nitrite oxidizing bacteria in microorganisms from the bacterial population, and obtain a high nitrite accumulation rate.

The present application relates to the field of microbial engineering and environmental biotechnology, and proposes a preservation method of nitrite oxidoreducing bacteria, comprising the following steps: S1, adding a nickel-containing solution into the nitrite oxidoreducing bacteria liquid, the nickel ions combine with the oxidoreductase in NOB and inhibit the enzyme activity, and the strain enters a low metabolic state; S2, preserving the bacteria liquid treated in step S1 in a 25-28 DEG C light-proof environment; S3, after the preservation is completed, removing the nickel ions in the bacteria liquid by using a chelating agent, and restoring the activity of the bacteria body. The method of the present application controls the reversible combination between the metal ions and the enzyme activity center, temporarily inhibits the metabolism of the NOB bacteria body, prolongs the preservation time of the bacteria liquid under the premise of avoiding refrigeration conditions and high-cost additives, and restores the activity of the bacteria body by removing the nickel ions before use.

The invention discloses a Nitrospira nitrite oxidizing bacterium and application thereof, and belongs to the technical field of microorganisms and environmental protection. The name of the strain is Nitrospira sp.Z02, the preservation number of the strain is GDMCC No: 66050, and the strain is preserved in Guangdong Microbial Culture Collection Center on March 25, 2025. The strain is a new strain and belongs to autotrophy, and the variety and diversity of Nitrospira strains are expanded; according to the present invention, nitrite oxidation can be performed under different oxygen concentrations, the good oxygen concentration adaptability is provided, the oxidation activity is retained in the pH value range of 5.5-8.5, and the weak acid condition can be tolerated; the strain can grow on a solid plate, and has the potential of molecular modification, so that the strain has better application value in treatment of wastewater containing nitrite.

The invention discloses a half short-cut nitrification method for middle-aged and aged landfill leachate, which mainly adopts two stages of short-cut nitrification reactors to generate nitrite nitrogen, the two stages of short-cut nitrification reactors are both aeration sedimentation tank combined construction types, and the nitrite nitrogen is generated by controlling respective proper process parameters and nitrite oxidizing bacteria inhibition modes. And meanwhile, a strategy of periodically alternating a two-stage short-cut nitrification reactor process sequence is adopted, so that the purpose of long-term stable operation of short-cut nitrification is achieved. The method is efficient, economical, stable in operation and high in practicability.

The method comprises the following steps that S1, a sample to be sorted is introduced into an inlet of a micro-fluidic chip, thalli are distributed into micro-droplets through the micro-fluidic chip, and the number of strains of each micro-droplet is smaller than or equal to 1; s2, adding a nutrient solution containing NO2 <->-N into the micro-droplets; s3, adding polyvinylpyrrolidone into the micro liquid drops, and culturing for 0.5 to 3 days; s4, monitoring the fluorescence intensity change of polyvinylpyrrolidone in the micro-droplets, and judging the generation condition of nitrate according to the fluorescence quenching degree; s5, micro-droplets generated by nitrate are collected and transferred into a shake flask to be cultured for 5-7 days; and S6, after the culture is finished, taking a culture and carrying out 16SrDNA identification. According to the method, the to-be-separated sample is subjected to micro-fluidic separation and micro-droplet culture, nitrate is qualitatively / quantitatively generated through PVP, nitrite oxidizing bacteria are obtained, and high-flux accurate separation of NOB is achieved.

The invention discloses an early warning method for proliferation of nitrite oxidizing bacteria in synchronous short-cut nitrification and denitrification, which comprises the following steps of: detecting ammonia nitrogen and COD (Chemical Oxygen Demand) of inlet and outlet water in a continuous flow synchronous short-cut nitrification and denitrification process by using an online water quality detector; the water quality data is processed by means of a programming platform, and whether the NOB in the reaction system is rapidly proliferated or not is early warned by utilizing the trained XGBoost model, so that the breakdown of the short-cut nitrification system caused by the mass growth of the NOB is avoided. According to the method, accurate early warning can be carried out in advance at the initial stage of rapid proliferation of the NOB in the synchronous short-cut nitrification and denitrification system, the detection cost of the NOB can be reduced while stable operation of short-cut nitrification is maintained, and online monitoring of the NOB in the reaction system and long-term stable and efficient operation of the synchronous short-cut nitrification and denitrification process are facilitated.

The application discloses a kind of urban sewage short path nitrification effect prediction device and its using method.The urban sewage short path nitrification effect prediction device includes activated sludge detection system and control adjustment system.The application detects the activity of some bacterial flora in activated sludge by maintaining an optimal environment for the growth of nitrite oxidizing bacteria, with a simple process flow, flexible control operation and high accuracy.The short path prediction device of the application has the advantages of simple structure, reasonable design, flexible and convenient operation, high processing efficiency, easy to carry, stable operation, safety and reliability, etc.

The application discloses a high-activity short-cut nitrification fast-starting long-term stable operation process and relates to the technical field of sewage biological treatment, which comprises the following steps: inoculating sludge and performing anaerobic fermentation pretreatment, combining with rapid sludge discharge and manual removal of expanded sludge and sludge foam; controlling sludge age in days, performing sludge repropagation, enriching ammonia-oxidizing bacteria, inhibiting and eluting nitrite-oxidizing bacteria; long-term operation under the condition of no sludge discharge, maintaining the abundance and activity of ammonia-oxidizing bacteria, and simultaneously controlling the abundance of nitrite-oxidizing bacteria; controlling the proliferation of nitrite-oxidizing bacteria by using the predation of protozoa and metazoan, and controlling the nitrite accumulation rate in the reactor; monitoring the concentrations of dissolved oxygen, pH value, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the reactor in real time, adjusting the ammonia nitrogen load and free ammonia concentration of influent, and adopting intermittent aeration or microporous aeration to adjust the distribution of dissolved oxygen and optimize the operation conditions of the short-cut nitrification reactor. The application is simple, economical and effective.

The invention relates to the technical field of chemical detection, in particular to a method for analyzing the content of total nitrogen in copper concentrate. 2, under the acidic condition, oxidizing nitrite in the copper concentrate sample to be detected into nitrate by using potassium permanganate; then excessive reduced iron powder is added, and nitro nitrogen is reduced into amino nitrogen; adding concentrated sulfuric acid and an accelerator, heating, and digesting and boiling the organic nitrogen at high temperature to convert the organic nitrogen into amino nitrogen; adding a sodium hydroxide solution, converting ammonium nitrogen into ammonia gas under an alkaline condition, distilling the ammonia gas, and absorbing the ammonia gas by using a boric acid solution; and finally, titrating the boric acid solution absorbing the ammonia gas by using a standard hydrochloric acid solution so as to calculate the total nitrogen content in the copper concentrate sample to be detected. By adopting the method for analyzing the total nitrogen content in the copper concentrate, expensive equipment can be prevented from being purchased, the analysis speed is high, the efficiency is high, and good accuracy is achieved.

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

The invention relates to a short-cut nitrification continuous flow control method and system based on free ammonia concentration analysis. The method comprises the following steps: recording the inflow free ammonia concentration of an n # short-cut nitrification reactor at a first reference moment as FA1; recording the inflow free ammonia concentration of the n # short-cut nitrification reactor at the second reference moment as FA0; the condition that FA of the n # short-cut nitrification reactor meets [FA0, FA1] is taken as a normal standard; if the FA of the n # short-cut nitrification reactor is lower than the normal standard, gradually reducing the aeration rate of the system until the FA of the n # short-cut nitrification reactor meets the normal standard; if the FA of the n # short-cut nitrification reactor is higher than the normal standard, the aeration rate of the system is gradually increased. According to the invention, high conversion rate of ammonia nitrogen in the treated sewage can be maintained, the operation stability of the short-cut nitrification and denitrification continuous flow reactor can be obviously improved, nitrite oxidizing bacteria in microorganisms can be gradually eliminated out of flora, and high nitrite accumulation rate can be obtained.

To provide a water treatment method capable of efficiently and stably biologically treating ammoniacal nitrogen in organic wastewater containing night soil or septic tank sludge using nitrite type nitrification and denitrification treatment, a water treatment apparatus, and a method for starting up the water treatment apparatus.SOLUTION: A water treatment method includes a nitrifying step of oxidizing ammonium nitrogen in organic wastewater containing human waste or septic tank sludge into nitrite nitrogen using organism-attaching carriers in which ammonium-oxidizing bacteria are attached to carriers, an extracting step of extracting some of the organism-attaching carriers in the nitrifying step, a nitrite treatment step of suppressing activity and growth of the nitrite-oxidizing bacteria attached to the organism-attaching carriers by bringing the extracted organism-attaching carriers into contact with a nitrite aqueous solution, and a returning step of returning the organism-attaching carriers obtained in the nitrite treatment step to the nitrifying step.SELECTED DRAWING: Figure 3

The invention belongs to the technical field of wastewater treatment, and discloses a method for realizing stable nitrosation of low-concentration ammonia-nitrogen wastewater by enriching free nitrous acid in situ. Comprising the following steps that anion exchange resin is placed in a solution containing nitrite nitrogen to be adsorbed to be in a saturated state, then the anion exchange resin is added into a pre-reactor containing activated sludge, and microorganisms in the activated sludge grow on the surface of the resin in an attached mode and form a biological membrane. The concentration of free nitrous acid (FNA) on the surface of the resin reaches 1.5-2.3 mg / L, and selective inhibition on nitrite oxidizing bacteria (NOB) is realized. And adding the resin after biofilm formation into a sequencing batch bioreactor, feeding low-concentration ammonia nitrogen wastewater, and continuously operating for a period of time, so that the nitrite nitrogen accumulation rate (NAR) is stably greater than 90%. The method has the advantages of high nitrosation efficiency, stable operation, energy conservation, consumption reduction and the like, and provides a new way for low-concentration ammonia-nitrogen wastewater treatment.

The present invention discloses a method for treating toilet wastewater by using in-situ bacteria and algae for short-cut nitrification and denitrification to remove nitrogen. By gradually increasing the influent ammonia nitrogen concentration, the invention inhibits nitrite-oxidizing bacteria in the activated sludge system, so that the initial ammonia nitrogen is oxidized into nitrite nitrogen to initiate a short-cut nitrification activated sludge system. After the system is stable, in-situ algae are cultured under suitable light conditions to construct a short-cut in-situ bacteria-algae system. The method of the present invention can reduce the aeration and carbon source costs in the traditional biological nitrogen removal process, solve the problem of poor adaptability of exogenous microalgae, and can also be applied to the efficient, low-energy-consumption and rapid nitrogen removal of other high-ammonia-nitrogen wastewater.

The utility model relates to a biochemical pond for sewage treatment, including the pond body, the top of pond body is equipped with the support, the support is equipped with oxford cloth, the oxford cloth bottom surface fixed mounting is with one side is the collection box of opening, the support is equipped with the movement component for pulling oxford cloth and moving along the length direction of pond body. Purpose at in a kind of biochemical pond for sewage treatment, to solve the scum in sewage in prior art can stay in the formation of scum layer under the adsorption of algae in aerobic zone, make oxygen diffusion resistance increase, lead to the biological available oxygen concentration of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria habitat area reduces, make the problem of denitrification efficiency reduction.

The invention discloses a short-cut nitrification and denitrification nitrogen removal treatment method for high-ammonia-nitrogen wastewater, belongs to the technical field of wastewater biological treatment, and prepares a poly (glycidyl methacrylate-co-acrylic acid) grafted Fe / Mn co-doped mesoporous charcoal functional carrier; through covalent immobilization of epoxy groups on ammonia oxidizing bacteria and targeted inhibition of iron and manganese ions on enzyme activity of nitrite oxidizing bacteria, stable short-cut nitrification, coupled anaerobic hydrolytic acidification in-situ carbon production and anoxic denitrification are realized, the total nitrogen removal rate reaches 92% or above, and aeration energy consumption is saved by 45% or above.