63 results about "Nitrogen removal" patented technology

This invention discloses a continuous-flow anaerobic bypass IFAS-AOA device and method for treating inert high-ammonia nitrogen wastewater, belonging to the field of biological treatment technology for high-ammonia nitrogen wastewater. The device consists of three parts: a raw water storage tank, a continuous-flow anaerobic bypass AOA reactor, and a sludge-water separation system. The effluent from the end of the anaerobic process enters the aerobic zone of the AOA reactor, while the anaerobic end-mixed liquor bypasses to the anoxic zone, mixes with the aerobic end-effluent, flows through the anoxic zone, and enters the sludge-water separation system. In the anaerobic zone, endogenous denitrifying bacteria store organic matter from the raw water as an intracellular carbon source and bypass to the anoxic zone. In the aerobic zone, short-cut nitrification coupled with anaerobic ammonia oxidation serves as the main nitrogen removal pathway. In the anoxic zone, anaerobic ammonia oxidation coupled with endogenous denitrification achieves deep nitrogen removal. The existence of anaerobic bypass allows some of the mixed liquor to bypass the aerobic zone and directly bypass to the anoxic zone, thus fully utilizing the carbon source in the raw water. This invention can achieve stable short-cut nitrification and effective retention of anaerobic ammonia oxidizing bacteria, showing broad application prospects.

The application discloses a method for simultaneously strengthening phosphorus removal and nitrogen removal by using an anaerobic-aerobic granular sludge reactor, and specifically comprises the following steps: adopting an anaerobic-aerobic operation mode to form aerobic granular sludge with biological phosphorus removal capacity in a sequencing batch reactor; sequentially performing an anaerobic water feeding stage, an aerobic stage, a sedimentation stage and a water discharge stage in each operation cycle; wherein the multi-point layered water feeding mode is adopted in the anaerobic water feeding stage; the wastewater to be treated is fed from the bottom and the middle of the granular sludge layer, wherein the water feeding amount at the bottom of the granular sludge layer accounts for 70-90% of the total water feeding amount; the intermittent aeration mode is adopted in the aerobic stage, each intermittent aeration cycle comprises an aeration period and a non-aeration period, and the time ratio of the single aeration period to the single non-aeration period is 2-3:1. By operation regulation, a microenvironment conducive to denitrification and phosphorus precipitation is constructed inside the aerobic granular sludge, carbon source competition can be effectively alleviated, phosphorus removal pathways are expanded, and the synergistic strengthening of the nitrogen removal and phosphorus removal processes is promoted.

The application discloses a kind of dispersing water supplementing devices for coastal plain river network direct ammonia oxidation denitrification of reclaimed water, including the pretreatment tank, direct ammonia oxidation device and water supplementing device connected in sequence, the upper electrode and lower electrode with longitudinal alignment hole are horizontally arranged in funnel-shaped desalination settlement area of the bottom of pretreatment tank, aeration disc is arranged at the top of desalination settlement area, flocculating agent storage tank is arranged in the upper part of pretreatment tank, its injection pipe is immersed below water surface, desalination settlement area is connected with direct ammonia oxidation device by communicating pipe, and the filler filled with direct ammonia oxidation microorganism is filled in the inside of direct ammonia oxidation device, the bottom of direct ammonia oxidation device is connected with water supplementing device, and water supplementing device is connected with a plurality of primary water distribution branch pipes through water distribution main pipe.The device can realize the maximization of direct ammonia oxidation unit denitrification efficiency through water supplementing front end pretreatment and water supplementing tail end treatment, and the maximization of coastal plain river network water supplementing benefit is realized through the designed dispersing water supplementing device.

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).

This invention relates to the field of deep nitrogen removal technology, specifically to a method for simultaneous nitrification and denitrification deep nitrogen removal in a multi-stage AO process for wastewater. The method is characterized by using multiple functional tanks connected in series to form a multi-stage AO process wastewater biological treatment system, and constructing an activated sludge model. Specifically, the activated sludge model is constructed by: acquiring process parameters and effluent water quality indicators; constructing a complete measured dataset; defining prediction targets and input features; determining whether there is a significant correlation between the input features and the prediction targets, constructing a set of associated inputs, introducing other input features layer by layer as interference features, calculating the first-order correlation coefficient between the predicted targets and input features after introducing interference features; determining whether there is an interference effect in the correlation between the prediction targets and input features based on the first-order correlation coefficient, and updating the set of associated inputs; and iteratively training the activated sludge model based on fused features, virtual data, and the measured dataset.

The application provides a hydrogen-nitrogen-based shaft furnace direct reduction ironmaking system and process method, and the ironmaking system comprises a shaft furnace, the shaft furnace has a reduction zone, a constant pressure zone and a cooling zone from top to bottom; a cooling and heat recovery unit, the cooling and heat recovery unit has a low-temperature process gas supply pipe connected with the lower part of the cooling zone, and a heat recovery pipe connected with the constant pressure zone and the upper part of the reduction zone; and a process gas circulation treatment unit, the process gas circulation treatment unit has a process gas circulation pipe connected with the top flue gas outlet of the shaft furnace and the reduction zone, and the process gas circulation pipe is provided with a first dust remover, a dehydrator and a nitrogen removal device. The application can solve the problems of uneven gas distribution and low heat utilization efficiency in the existing hydrogen-nitrogen-based shaft furnace process, effectively control the nitrogen concentration in the process, efficiently recover and utilize the system energy, and optimize the product cooling and the heat distribution in the furnace.

This invention proposes a solar-powered electrocatalytic AOR coupled with biological denitrification for complete nitrogen removal, comprising a solar power unit, an ammonia electrolyzer, and a biological denitrification unit. In the ammonia electrolyzer, the anode and cathode are connected to the positive and negative terminals of the solar power unit, respectively. The anode includes a conductive substrate and a heteroatom-doped nickel-based metal catalyst loaded on it. Solar power reduces energy consumption, and the battery allows for continuous operation even at night, extending the unit's lifespan. The solar-powered electrocatalytic AOR coupled with biological denitrification provided by this invention has a reasonable design, uses a low-cost conductive substrate as the catalytic electrode, has a simple preparation method, is easy to scale up, is highly efficient, and produces green and pollution-free products. It achieves a nitrogen removal efficiency of over 98%. Electrocatalytic ammonia oxidation combined with multiple electrode sets accelerates the ammonia oxidation process, saving significant time and costs and enhancing ammonia nitrogen treatment capabilities.

This invention provides a combined heterotrophic and autotrophic denitrification treatment device, relating to the field of water treatment technology. It includes a pretreatment unit, a heterotrophic denitrification unit, an autotrophic denitrification unit, and a deep filtration unit connected in sequence. The device employs a combined process of heterotrophic denitrification for preliminary nitrogen removal and autotrophic denitrification for deep nitrogen removal. First, heterotrophic denitrification rapidly removes most of the nitrate, reducing the influent load. Then, sulfur-based autotrophic denitrification achieves deep nitrogen removal. This method is adaptable to various wastewaters with high and low C / N ratios, resulting in more thorough nitrogen removal and stable nitrate nitrogen levels in the effluent. The heterotrophic stage requires only a small amount of organic carbon source for preliminary nitrogen removal, while the autotrophic stage uses reduced sulfur as an electron donor, eliminating the need for additional organic carbon sources and reducing carbon source addition costs. Simultaneously, the slow proliferation of autotrophic microorganisms results in sludge production far lower than that of a single heterotrophic process, reducing sludge treatment and disposal costs.

This invention belongs to the fields of environmental microbiology and wastewater treatment technology, specifically relating to a composite microbial agent utilizing endogenous carbon in wetlands and its application in constructed wetlands for wastewater treatment. The composite microbial agent consists of *Pseudomonas schlegelii* JH-1 and *Klebsiella pasteurellium* F19. *Pseudomonas schlegelii* JH-1 is an aerobic denitrifying bacterium responsible for nitrate reduction; *Klebsiella pasteurellium* F19 is a rhizosphere growth-promoting bacterium that promotes plant growth and accelerates endogenous carbon release. The two strains do not have antagonistic effects and form a synergistic relationship in constructed wetlands, significantly improving the nitrogen removal efficiency of low C / N wastewater while simultaneously promoting plant growth and reducing greenhouse gas emissions, resulting in good ecological benefits.

This invention belongs to the field of flue gas treatment technology and provides a process for desulfurization, denitrification, and dust removal of flue gas from waste incineration power plants. The process includes the following steps: Step 1: The flue gas from the waste incineration boiler outlet is introduced into a circulating fluidized bed reactor for desulfurization treatment. After the desulfurization reaction, the gas-solid mixture is separated by a gas-solid separator to obtain desulfurized flue gas; Step 2: The temperature of the desulfurized flue gas is adjusted using a burner, and then introduced into an integrated dust and nitrogen removal device with ceramic fiber catalytic filter tubes inside. While filtering dust, a selective catalytic reduction denitrification reaction occurs on the surface and inside of the filter tubes to obtain denitrified and dust-removed flue gas; Step 3: The denitrified and dust-removed flue gas is discharged externally by an induced draft fan. This invention simplifies the desulfurization, denitrification, and dust removal process, reduces the number of equipment and floor space required, lowers system investment and operation and maintenance costs, and simultaneously meets the stringent requirements for waste incineration flue gas emissions.

The application discloses Vibrio fluvialis JH-3, which is preserved in the Guangdong Microbial Culture Collection Center and has a preservation number of GDMCC NO: 66094. The application also discloses application of the Vibrio fluvialis JH-3 in denitrification and nitrogen removal. The application further discloses a denitrification and nitrogen removal method for salt-containing wastewater, which comprises the following steps: mixing the Vibrio fluvialis JH-3 with salt-containing wastewater to obtain a mixed solution, and culturing to carry out denitrification and nitrogen removal. The Vibrio fluvialis JH-3 screened by the application has strong salt-tolerant denitrification capacity and can be used for biological nitrogen removal of high-salt wastewater.

This invention relates to an improved constructed wetland experimental system for polluted seawater, comprising an constructed wetland pool with its opening facing upwards. The pool contains, from top to bottom, a soil layer, a first support layer, a core filler layer, and a second support layer. Wetland plants are grown on the soil layer, and the core filler layer contains iron ore. An outlet pipe and an outlet valve are connected to the constructed wetland pool in the area corresponding to the second support layer. This invention investigated the iron ore content, finding that an appropriate amount of iron ions can significantly improve nitrogen and phosphorus removal efficiency and enhance resistance to shock loads. This invention employs a submerged-drainage operation mode, while simultaneously regulating the submerged-drainage ratio, influencing dissolved oxygen distribution and microbial community structure. A reasonable submerged-drainage ratio can achieve spatiotemporal coupling of nitrification-denitrification and the iron cycle, improving overall nitrogen removal efficiency.

The utility model relates to a kind of electric field activation pyrite removal wastewater total nitrogen device, belong to sewage treatment technical field, the utility model includes water distribution tank, reaction tank and effluent tank;Anode cage, cathode tube are equipped in the reaction tank, and sulphur iron ore particles are filled between cathode tube and anode cage;The power supply is connected to the cathode tube and anode cage;Water distribution tank and reaction tank between being equipped with baffle A, and the bottom of baffle A remains water flow passage A;Reaction tank and effluent tank between being equipped with baffle B;Water flow passage B is left in the left side of baffle B;The structure of the utility model makes sewage contact with sulphur iron ore under the action of electric field, and nitrate nitrogen and nitrite nitrogen can be reduced to nitrogen without biological bacteria, and nitrogen removal rate is high.

This invention discloses a system and method for defluorination and ammonia removal from glass engraving wastewater. The defluorination and ammonia removal method includes the following steps: reacting glass engraving wastewater with an alkaline calcium-containing compound solution to produce a primary mixed liquid; reacting the primary mixed liquid with a fly ash suspension to obtain a secondary mixed liquid; subjecting the secondary mixed liquid to a flocculation reaction to produce a tertiary mixed liquid; filtering the tertiary mixed liquid to produce filtrate, neutralizing the filtrate with an oxalic acid solution, and then sequentially performing coagulation and flocculation reactions to produce a quaternary mixed liquid; subjecting the quaternary mixed liquid to sedimentation separation to produce a supernatant; and subjecting the supernatant to short-cut nitrification and denitrification treatment to produce a defluorinated and deammoniated supernatant. This invention uses fly ash to replace part of the slaked lime for defluorination, separates sludge and water through plate and frame filtration, adjusts the pH with oxalic acid, and adds coagulants and flocculants to achieve decalcification and hardening. The remaining oxalic acid provides a carbon source, and short-cut nitrification and denitrification are used for nitrogen removal, improving the defluorination and ammonia removal efficiency and reducing treatment costs.

This invention belongs to the field of wastewater treatment technology and specifically discloses an integrated autotrophic denitrification device, method, and wastewater treatment system. The device includes a reactor containing, from bottom to top, a short-cut nitrification zone, an anaerobic ammonia oxidation zone, a sulfur autotrophic zone, and a gas chamber. An inclined first partition plate is located at the top of the short-cut nitrification zone, and an inclined second partition plate is located at the bottom of the anaerobic ammonia oxidation zone, forming a gas-sludge-water separation chamber. The reactor contains a vertically extending gas-liquid lifting channel and a sludge-water separation channel surrounding it. A third partition plate is located between the anaerobic ammonia oxidation zone and the sulfur autotrophic zone. The sulfur autotrophic zone contains a clear liquid separation structure, the outlet of which is connected to the bottom of the anaerobic ammonia oxidation zone via a reflux circulation pipe. This invention's device achieves efficient, low-consumption, and stable denitrification of wastewater with high ammonia nitrogen and low carbon-to-nitrogen ratio through self-separation of sludge, water, and gas and self-driven internal circulation. It requires no external carbon source, occupies a small area, has low operating costs, and has broad application prospects.

This invention relates to a method for treating high-concentration inorganic nitrogen wastewater using a mixed culture of *Paragonimus* strains wg2 and wg1, belonging to the field of resource and environmental microbiology. This invention utilizes the co-culture of strains wg2 and wg1 to treat simulated wastewater, primarily exploring the effect of the mixed strains wg2 and wg1 on NO2 under anoxic conditions. ‑ -N, NO3 ‑ The study investigated the nitrogen removal capacity of nitrite-nitrogen (N), the optimal ratio of mixed bacteria, and the nitrogen removal performance of the mixed bacteria in treating simulated wastewater. Results showed that *Paragonimus* strains wg2 and wg1 acted synergistically in a mixed culture system, effectively addressing both nitrite accumulation and efficient nitrate degradation, demonstrating high nitrogen removal capacity. This study provides important practical guidance for the development of biological nitrogen-removing agents that simultaneously remove nitrite and nitrate.

This invention discloses an LNG unit and method integrating natural gas helium extraction, denitrification, and BOG reliquefaction. The unit includes a main heat exchanger, a heavy hydrocarbon separator, a denitrification tower, a denitrification tower condenser, a denitrification tower reflux tank, a helium distillation tower, a helium distillation tower condenser, a helium distillation tower reflux tank, a refrigerant cryogenic separator, an LNG storage tank, a BOG heater, a BOG compressor, a helium distillation tower reboiler, a mixed refrigerant compressor system, and a nitrogen compressor system. This solution integrates the mixed refrigerant refrigeration cycle and the nitrogen refrigeration cycle, and through the co-production mode of LNG and crude helium, it significantly reduces the plant's overall energy consumption and improves economic efficiency. Moreover, the unit has outstanding advantages such as strong raw material adaptability, safe and reliable operation, and wide application scenarios, realizing the diversified and efficient utilization of natural gas resources.

The present application relates to the technical field of industrial wastewater treatment, in particular to a method for treating coal chemical high ammonia-nitrogen wastewater based on Canon-A / O process of anaerobic ammonia oxidation, which takes Canon reaction tank as the main denitrification unit and bears most of the ammonia-nitrogen removal load, and takes A / O biochemical tank as the subsequent guarantee unit to deeply purify residual nitrogen, and the two units work together to realize the cascade denitrification and deep treatment of high ammonia-nitrogen wastewater. The method provided by the present application can stably achieve more than 95% of the overall removal rate of ammonia-nitrogen and more than 90% of the removal rate of total nitrogen.

This invention provides a method and apparatus for deep nitrogen removal from low C / N ratio wastewater using a coupled sulfur-iron autotrophic denitrification process, belonging to the field of advanced wastewater treatment technology. The method includes inoculating sludge into a hydrolysis-acidification reactor and a sulfur-iron autotrophic denitrification reactor, respectively; adding biofilm packing and hydrolytic enzyme packing to the hydrolysis-acidification reactor; adding sulfur-iron packing to the sulfur-iron autotrophic denitrification reactor; pumping effluent into the hydrolysis-acidification reactor for preliminary denitrification to form a pretreated product; and sending the pretreated product from the hydrolysis-acidification process into the sulfur-iron autotrophic denitrification reactor for deep autotrophic denitrification. This coupling of the hydrolysis-acidification reactor and the sulfur-iron autotrophic denitrification reactor allows denitrifying bacteria to remove most of the nitrate nitrogen from the hydrolyzed organic matter. The sulfur-iron autotrophic denitrification process, because it does not require an external organic carbon source, has advantages such as reduced organic matter residue, less sludge production, lower sludge treatment costs, good denitrification effect, and less secondary pollution.

The present invention relates to a method for treating wastewater in urban wastewater treatment plants that comprises a first step in which urban wastewater is subjected to controlled aeration in a first reactor and passes to a solids settler under the effect of gravity, the water coming out of the settler due to overflowing; a second step of partial nitritation with aerobic granular sludge in a biological reactor, in which the COD (Chemical Oxygen Demand) at values below 125 ppm and the suspended solids at values below 35 ppm are removed from the wastewater, and partial nitritation of the ammonium coming out of the biological reactor with a NO27NH4+ ratio suitable for subsequent autotrophic nitrogen removal; and a third step of anaerobic oxidation of ammonium in a granular ANAMMOX biomass biological reactor.

This invention discloses an apparatus and method for achieving deep nitrogen removal and phosphorus recovery through dual short-range coupled anammox fermentation using in-situ sludge fermentation. First, calcium chloride solution is added to the anammox reactor at the rear end of a two-stage PNA process to form recoverable phosphorus crystals such as Ca-P precipitates. Anaerobic ammonia oxidizing bacteria attach to the surface of the precipitates, thereby enriching and retaining them within the anammox reactor. During the continuous formation of anaerobic ammonia oxidizing particles, unfermented waste activated sludge is added to the PNA process. The slow hydrolysis and acidification of the waste activated sludge provide a carbon source for the short-range denitrifying bacteria, completing the transformation from single-stage PNA autotrophic nitrogen removal to dual short-range coupled anammox synergistic nitrogen removal. In this invention, the anaerobic ammonia oxidizing bacteria in the granular sludge after operation can reach 12%, 73% of the sludge exhibits a particle size greater than 200 μm, and the total nitrogen removal rate remains above 90%, with most phosphorus existing in the recoverable form of Ca-P crystals.

This invention provides a method for efficient biological nitrogen removal from wastewater, belonging to the field of wastewater treatment technology. The method employs a modified anoxic / aerobic (ANO) process, wherein the aerobic tank utilizes a modified two-stage SBR nitrogen removal system, including an aeration system, an influent system, a chemical dosing system, a wastewater tank, and a sludge removal system. This invention achieves precise balance between the nitrification and denitrification systems in the SBR system through PLC automatic control of aeration shutdown, simultaneous influent and effluent flow, and changing the carbon source addition location from two stages to one stage, along with real-time monitoring and control of the operating status. This results in wastewater treatment achieving stable TN levels meeting standards: COD ≤ 40.0 mg / L, ammonia nitrogen ≤ 5.00 mg / L, TN ≤ 15.0 mg / L, and TP ≤ 0.3 mg / L.

This invention belongs to the field of aquatic ecological restoration technology, specifically relating to a wetland buffer zone system based on a polyhydroxyalkanoate-induced denitrifying bacteria system. The system includes: a wetland buffer zone substrate with a sloping top surface; several emergent plants planted on the slope of the substrate; a denitrifying bacteria system comprising several polyhydroxyalkanoate strips embedded in the substrate; and several partitions with mesh openings embedded in the substrate. The slow-release properties of the polyhydroxyalkanoate and the periodic metabolism of the emergent plants ensure the long-term activity of the denitrifying bacteria, while the structural partitions ensure the system's stability under complex hydraulic conditions. This invention combines the advantages of efficient nitrogen removal, ecological restoration, and low maintenance costs, making it suitable for river and lake buffer zones, constructed wetlands, and other similar applications.

This invention provides a short-cut denitrification coupled with anaerobic ammonia oxidation composite biofilm based on carbon load regulation, its preparation method, and its application, belonging to the field of wastewater treatment technology. The method of this invention includes the following steps: adding biofilm packing material enriched with denitrifying bacteria inside a sequencing batch reactor (SBR); adjusting the influent flow rate and carbon source dosage; gradually reducing the influent carbon-to-nitrogen ratio (C / N ratio); and in-situ enriching anaerobic ammonia oxidizing bacteria on the biofilm packing material to form a composite biofilm with symbiotic short-cut denitrifying bacteria and anaerobic ammonia oxidizing bacteria. The gradual reduction of the influent C / N ratio includes multiple continuous and stable operation stages. This invention directionally enriches anaerobic ammonia oxidizing bacteria on existing denitrifying bacterial membranes, resulting in a strong synergistic effect of functional bacterial communities. Under a C / N ratio of 2.5, the anaerobic ammonia oxidation nitrogen removal contribution rate is ≥60%, and the total nitrogen removal rate is consistently above 70%. It has advantages such as no need for additional inoculation, short construction cycle, and stable nitrogen removal efficiency.

This invention belongs to the field of wastewater treatment technology, specifically relating to a foamed porous core-shell type anaerobic ammonia oxidation-sulfur autotrophic composite filter media, its preparation method, and its application. This invention uses waste crocidolite and Bayer red mud as the main raw materials, a mixture of sodium tetraborate and cryolite as a flux, and fermented waste biomass as a foaming agent. After compaction, granulation, and sintering, spherical filter media A1 is obtained. Then, an electrostatic spray adhesion technology is used to coat the surface of A1 with an adhering liquid containing dolomite, siderite, and lapis lazuli powder. After high-temperature firing, anaerobic ammonia oxidation filter media A1-A is obtained. Separately, an adhering liquid containing gypsum, graphite, and pyrite is coated onto the surface of A1, and after high-temperature firing, sulfur autotrophic filter media A1-S is obtained. The obtained filter media A1-A and A1-S can effectively separate anaerobic ammonia oxidation bacteria from sulfur autotrophic bacteria in their ecological niches, avoiding vicious competition between sulfur autotrophic bacteria and anaerobic ammonia oxidation, thereby improving the autotrophic nitrogen removal effect.

This disclosure relates to a novel bioreactor. The bioreactor includes: a main body, configured as a tank-shaped structure with a reaction chamber, the reaction chamber being provided with upper and lower partition layers and left and right partition layers. The upper and lower partition layers are configured to divide the reaction chamber into an anaerobic reaction chamber and a facultative and aerobic reaction chamber located above the anaerobic reaction chamber. The left and right partition layers are configured to divide the facultative and aerobic reaction chambers into a facultative and aerobic reaction chambers. The upper and lower partition layers are provided with an anaerobic outlet connecting the anaerobic reaction chamber and the facultative reaction chamber. The bottom of the left and right partition layers is provided with a water channel connecting the facultative and aerobic reaction chambers; an anaerobic three-phase separator; an aerobic three-phase separator; and a first aeration device. The bioreactor provided by this disclosure can be based on existing equipment, resulting in a smaller footprint, a more compact structure, and eliminating the need for additional denitrification equipment in the nitrogen removal process.

The application discloses a kind of based on biogas desulfurization sulfur paste recycling leachate internal circulation sulfur autotrophic denitrification method, belong to solid waste treatment technical field. Including: collecting domestic waste incineration plant leachate anaerobic biogas is produced by complex iron desulfurization in sulfur paste by-product, it is pretreated into slurry or porous filler after being added to the anoxic zone of leachate biochemical treatment unit;Using elemental sulfur in sulfur paste as electron donor to drive sulfur autotrophic denitrification, carbonate in situ neutralization reaction acidity, iron ion catalytic reaction rate, realize " waste treatment with waste ".Meanwhile, through intelligent control unit continuously monitoring pH, nitrate and other parameters, execute threshold detection, trend anomaly identification, correlation verification and other multi-mode anomaly detection, and according to abnormal level trigger grading early warning and self-healing control strategy, the application simultaneously solves the dual problems of sulfur paste disposal difficulty and leachate deep denitrification carbon source deficiency, significantly reduces operating cost, improves system intelligence and operation reliability.

According to the present disclosure, a sewage and wastewater effluent treatment method is provided. The method comprises the steps of: providing sewage and wastewater effluent; using a nanofilter (NF) to separate the sewage and wastewater effluent into NF concentrate and NF permeate; removing organic materials from the NF concentrate; introducing the NF permeate into reverse osmosis so as to separate same into reverse osmosis concentrate and deionized water; removing nitrogen from the reverse osmosis concentrate, the nitrogen removal step being performed by a biological or electrochemical method; and combining the NF concentrate that passed through the organic material removal step and the reverse osmosis concentrate that passed through nitrogen removal step. The method enables environmentally friendly and efficient treatment of sewage and wastewater effluent.

This invention relates to the field of water treatment environmental functional materials, and discloses a method for preparing a chemical-free biofilm packing material for simultaneous nitrogen and phosphorus removal. The method includes the following irreversible steps performed sequentially, with all byproducts generated throughout the production process used in a closed loop for the preparation of bamboo charcoal / activated carbon, achieving 100% utilization of raw materials: S1, dedicated pretreatment of raw materials using a weak alkali-hydrogen peroxide solution for gentle degumming, removing pectin, lignin, and amorphous hemicellulose while retaining a highly crystalline cellulose skeleton; S2, matrix forming and synergistic control of pore size and density; S3, modification for biodegradation-resistant interface protection; S4, simultaneous nitrogen and phosphorus removal functional loading. By utilizing a wide range of raw material sources, industrially scalable processes, and controllable costs, this method completely solves the long-standing problems in the industry, such as adding carbon sources for nitrogen removal, adding chemicals for phosphorus removal, easy degradation of bamboo-based packing materials, and secondary pollution from plastic packing materials. It constructs a comprehensive technological protection barrier and possesses significant engineering application and technological innovation value.