44 results about "Denitrification process" patented technology

The application discloses a biological electrochemical auxiliary sulfur conversion promoting sulfur-based denitrification and sulfate emission reduction method and belongs to the field of water treatment. ‑ Nitrogen-containing wastewater enters an elemental sulfur denitrification system, and NO3 0 is reduced to N2 by sulfur autotrophic denitrifying bacteria, and elemental sulfur (S 2‑ ) is converted into SO4 2‑ . Effluent enters a cathode chamber of an electrochemical auxiliary sulfate reduction system, and hydrogen autotrophic sulfate reducing bacteria utilize cathode hydrogen production to reduce SO4 ‑ to HS 2‑ , and meanwhile, alkalinity produced by cathode hydrogen production neutralizes acidity produced in the denitrification process in the elemental sulfur denitrification system. ‑ HS 2‑ / supernatant is returned to the elemental sulfur denitrification system to react with S 0 to generate polysulfide (S n 2‑ ), S n 2‑ , which is used as an efficient electron donor to participate in denitrification, thereby significantly improving denitrification efficiency. The application does not need to add an organic carbon source, sludge production is small, high-concentration nitrogen-containing wastewater is efficiently treated, and the content of sulfate in effluent is simultaneously reduced, thereby realizing sulfur resource recycling, and the application is an economic and environment-friendly autotrophic denitrification method.

This application relates to the field of wastewater treatment, specifically disclosing a sulfur autotrophic denitrification process; including the following specific steps: S1: After adjusting the pH of calcium nitrate tetrahydrate solution and ammonium dihydrogen phosphate solution to alkaline, triethanolamine is added dropwise to the calcium nitrate solution, followed by the addition of ammonium dihydrogen phosphate solution to form a reaction solution. The pH of the reaction solution is maintained at alkaline, and the reaction is heated. After filtration, washing, and drying, hydroxyapatite powder is obtained. The hydroxyapatite powder is mixed with a foaming agent, foam stabilizer, and adhesive, pressed into shape, and sintered to obtain a porous ceramic carrier; S2: The porous ceramic carrier, ground inorganic energy material, and denitrifying bacteria are added to the wastewater to be treated, mixed, and subjected to aeration treatment. The inorganic energy material is replenished periodically to complete the process. The sulfur autotrophic denitrification process used in this application has high denitrification efficiency, and no replenishment of denitrifying bacteria is required during the process.

This invention discloses the application of a salt-tolerant immobilized denitrifying microbial agent in denitrification of low-temperature saline river water. The salt-tolerant immobilized denitrifying microbial agent is placed in a net bag and evenly suspended in the river channel. The salt-tolerant immobilized denitrifying microbial agent uses zeolite as the immobilization carrier, and the immobilized microorganisms are salt-tolerant denitrifying microbial agents enriched and screened from rivers flowing into the sea. The dosage of the salt-tolerant immobilized denitrifying microbial agent is 2 g·L⁻¹. ‑1 The dosage is the mass-to-volume ratio of the immobilized denitrifying bacterial agent to the river water. The low-temperature saline river water is saline river water with nitrate nitrogen as the main pollutant. The temperature of the low-temperature saline river water is 10℃~25℃. During the denitrification process, a carbon source is added to the river water to maintain denitrification efficiency. This invention has demonstrated its feasibility in practical engineering applications through pilot-scale experiments. It can effectively remediate river pollution and solve the problem of severe and difficult-to-remediate water pollution in saline rivers.

This invention discloses a flue gas denitrification device and method. The device is suitable for SCR flue gas denitrification process of ultra-low temperature flue gas, and includes: multiple catalyst modules arranged in rows and columns on the cross-section of the flue, used to adsorb NO in the ultra-low temperature flue gas in a non-heated state. x The NH3 in the ammonia-air mixture, and the NO when heated to the flue gas denitrification window temperature. x The catalyst undergoes a denitrification reaction with NH3. A microwave assembly is positioned above the catalyst modules within the flue gas duct. This assembly includes a horizontally moving microwave generator for heating each catalyst module in a row or column, zone by zone. Once the heated zone has completed the denitrification reaction and the catalyst has been regenerated, the microwave generator moves to the next zone for heating. This invention, through the modular design of the catalyst and the built-in, movable microwave source, enables the catalyst modules to be heated zone by zone in a step-by-step manner, achieving rapid temperature rise of the catalyst module to the flue gas denitrification window temperature and quickly completing the catalyst regeneration process.

The application discloses a carbon source adding amount adjusting method, device, product and medium of a denitrification process, and relates to the technical field of sewage treatment. In the method, real-time operation parameters in the denitrification process and a reaction tank volume of a reaction tank where the denitrification process is located are acquired, the real-time operation parameters including an influent flow, an influent nitrate nitrogen concentration, a terminal nitrate nitrogen concentration and a mixed liquid suspended solid concentration; a sludge denitrification rate representing current denitrification microbial activity is obtained based on the real-time operation parameters and the reaction tank volume; an influent load is determined based on the influent flow and the influent nitrate nitrogen concentration; a carbon source reference adding amount is determined according to the sludge denitrification rate and the influent load; a carbon source feedback adjusting amount is obtained according to a deviation between the terminal nitrate nitrogen concentration and a preset nitrate nitrogen target value, and the carbon source reference adding amount is corrected based on the carbon source feedback adjusting amount to obtain the carbon source adding amount. The method has the effect of ensuring accurate matching of the carbon source adding amount and actual demand.

This invention relates to a device and method for rapidly starting a short-cut nitrification process, belonging to the field of water treatment. The invention involves inoculating a secondary sedimentation tank with sludge and adding a polyurethane biological sponge carrier into a sequencing batch reactor (SBR). First, a phased influent influent + incremental post-aeration strategy (increasing aeration time first, then increasing aeration rate) is adopted. This utilizes nitrate and a dynamic oxygen environment to drive the migration of *Candidatus Contendobacter* to the sponge carrier and complete its enrichment and acclimatization, reducing the obstruction of O2 on the endogenous denitrification process of *Candidatus Contendobacter* under aerobic conditions. The phased influent influent is then eliminated, and NH4 is introduced. + -N synthesis wastewater is treated using a low-alkalinity strategy (reducing influent KHCO3 concentration) + post-aeration with an initial increase followed by a decrease in aeration volume, combined with strong NO2 stimulation from Candidatus Contendobacter in a low dissolved oxygen environment. ‑ -N reducing power inhibits NOB growth, enabling rapid start-up of the short-cut nitration process.

This invention relates to the field of air pollutant control and environmental protection materials technology, and discloses a low-temperature oxidation adsorbent and its application in flue gas NO. X The deep denitrification process utilizes a low-temperature oxidation adsorbent comprising an amino-functionalized micron-sized diatomite core layer and an aldehyde-functionalized nano-manganese-cerium composite oxide active shell layer. The core layer and the active shell layer are bonded by Schiff base covalent bonds formed by the condensation of amino and aldehyde groups, and C=N covalent bonds are formed at the interface between the two phases, constructing a micro-nano hierarchical composite material with integrated adsorption and catalysis functions. The micro-nano dual-scale rough structure on the surface of this material, along with the synergistic effect of low surface energy phenylsiloxane and diundecyl long-chain hydrophobic groups, endows the catalyst with excellent hydrophobic properties. Under harsh high humidity conditions of 100℃ and 10-20 vol% H2O, the catalyst can still maintain a denitrification rate of over 81%, and the activity loss rate is significantly lower than that of traditional physical mixed catalysts, effectively coping with fluctuations in industrial high-humidity desulfurization flue gas.

The application discloses a kind of basin nitrogen multi-scale coupling simulation and accurate traceability evaluation method and system, belong to the technical field of basin water environment simulation and non-point source pollution control, method includes: based on the soil, weather, land use and nitrogen deposition data of research area, the runoff of each grid, runoff nitrogen concentration, deep leakage and nitrogen leaching amount are calculated;D8 flow direction method and triangular unit line method are used to calculate the flow rate of basin outlet;The amount of nitrogen transport of surface path is calculated using the first-order kinetic method;Based on deep leakage and nitrogen leaching amount, the kinetic model coupled with organic nitrogen mineralization, microbial assimilation and denitrification process is used to calculate the amount of nitrogen transport of underground path;Comprehensive above result, output grid scale water nitrogen flux spatial distribution map, identify the key source area of nitrogen loss.The application realizes the multi-scale integrated simulation and accurate traceability of nitrogen migration and transformation by closely coupling grid scale biogeochemical process and watershed scale hydrological process.

This invention discloses an effective method for reducing nitrogen content in the production of sustainable aviation fuel feedstock, belonging to the field of sustainable aviation fuel production technology. Through a tiered processing approach, high-nitrogen feedstock is first pretreated with microwave-assisted plasma to efficiently break the C-N bonds of macromolecular nitrogen heterocycles. Then, pre-denitrification is performed using an AI-intelligent optimized adsorption bed filled with amino-functionalized modified MOF adsorbent. Subsequently, in a multi-field coupled microchannel reactor, mild hydrogenation is carried out for deep denitrification under the synergistic effects of ultrasound, electric field, and near-infrared photothermal treatment. Finally, the fraction is separated and purified using a membrane separation-distillation coupled system to obtain aviation kerosene fraction with a nitrogen content of less than 1 ppm, achieving a total yield of up to 92%. This invention also converts the desorbed and enriched nitrogen resources into high-purity acetonitrile through electrochemical synthesis. This method overcomes the limitations of traditional high-temperature, high-pressure hydrogenation refining, achieving ultra-deep denitrification under mild conditions, significantly reducing energy consumption and catalyst coking rate, while simultaneously realizing high-value conversion of nitrogen resources.

This invention provides a process and strain for removing recalcitrant organic matter and performing deep denitrification treatment on wastewater from Maotai liquor production. The specific process includes introducing wastewater into a regulating tank for water quality analysis; introducing the wastewater from the regulating tank into an anaerobic reactor; and introducing the effluent from the anaerobic reactor into an aerobic reactor, adding *Moraxella rosenbergii* (seawater). Rossellomorea aquimaris The process involves ZC2402-MT oxidation; the aerobic reaction effluent is then fed into an ozone reactor to convert the remaining recalcitrant organic nitrogen into ammonia nitrogen; the ozone effluent is then fed into a BAF (Biological Acid Fluidization) unit to remove remaining COD and perform nitrification; the BAF effluent is then fed into an autotrophic denitrification unit. This invention cultivates highly efficient degrading bacteria for the recalcitrant organic matter portion of liquor wastewater, while simultaneously adjusting the process to ensure that the effluent COD and total nitrogen meet standards, and to reduce costs, providing a more scientific, rational, and effective process for the treatment of liquor wastewater.

This invention discloses a decentralized airlift reoxygenation circulating biological denitrification wastewater treatment device, employing an integrated inner and outer cylinder design, encompassing wastewater treatment, sludge-water separation, and discharge, with a complete process and reasonable structure. The area between the inner and outer cylinders forms a circular wastewater treatment zone with circulating flow, encompassing a two-stage AO biological denitrification process. It eliminates the need for nitrification liquor recirculation, exhibiting excellent denitrification effect, resistance to shock loads, and ease of management. The inner side of the inner cylinder serves as a sedimentation zone, with periodic manual or mobile sludge removal. An airlift device provides circulation power and pre-oxygenation; the circulating water volume is adjusted by regulating the air supply, thereby controlling the nitrification liquor recirculation ratio. The device consumes only one air pump, which supplies air to both the airlift device and the aeration device, resulting in low investment, low energy consumption, and easy management. Fixed supports and rope-type fiber packing are installed throughout the wastewater treatment zone, effectively preventing packing blockage and short-circuiting problems, and facilitating the timely discharge of detached biofilm.

This invention relates to a method for identifying functional microorganisms in a mixed nutrient denitrification system of iron autotrophic and heterotrophic components, belonging to the field of wastewater biological treatment technology. The invention first constructs a mixed nutrient denitrification system, and then conducts microenvironmental culture by setting up a control group, an autotrophic labeled group, and a heterotrophic labeled group. Separation is then performed using cesium chloride density gradient centrifugation. 13 C-labeled heavy-chain DNA was used to determine the heavy-chain position using real-time quantitative PCR, followed by 16S rRNA gene sequencing to accurately identify iron-autotrophic and heterotrophic functional microorganisms. Based on the identification results, the response patterns and interaction mechanisms of different trophic microorganisms were analyzed by regulating the COD / TN ratio of the system and constructing a molecular ecological network. This invention achieves accurate identification and interaction analysis of functional microorganisms in complex mixed trophic systems, providing a reliable technical means for optimizing wastewater denitrification processes.

The application provides a device and method for regulating biological membrane niche to realize simultaneous methanogenesis and denitrification, and belongs to the technical field of water treatment, comprising a biological membrane reactor, a water distribution tank, a peristaltic pump, an aeration system and an electric stirrer, the biological membrane reactor is filled with biological membrane carriers, and an anoxic-anaerobic biological membrane layered structure can be formed inside the carriers. The application inoculates functional sludge, domesticates the biological membrane carriers, regulates aeration intensity to build a dissolved oxygen gradient, combines with microelectrode real-time monitoring of the dissolved oxygen and oxidation-reduction potential profile inside the carriers, realizes efficient cooperation of denitrifying bacteria and methanogenic bacteria in the same biological membrane reactor, integrates anaerobic digestion and denitrification process, has the advantages of low energy consumption, small land occupation and strong impact resistance, can simultaneously realize organic matter degradation and denitrification of high-concentration organic wastewater, optimizes carbon source utilization efficiency, reduces treatment cost, is suitable for treatment of various high-concentration organic wastewater, and has important theoretical innovation value and engineering application prospect.

This invention discloses a zoned permeable reactive barrier (PRB) for groundwater denitrification using a combination of zero-valent iron / slow-release carbon and zeolite, and its operating process. The PRB's structure comprises: (1) a quartz sand water distribution zone; (2) Fe... 0 / C-Denitrifying bacteria reaction zone; (3) Zeolite adsorption zone. This invention uses a mixture of biomass slow-release carbon and artificial slow-release carbon as a slow-release carbon source, and adds zero-valent iron to construct Fe 0 The / C system, using a mixed denitrifying bacteria agent for rapid start-up, and a zoned permeable reactive barrier (PRB) operation process for groundwater denitrification have been developed. This includes: filling processes based on different media permeability coefficients, reaction zone packing material compatibility based on different slow-release rates, and operating parameters based on different groundwater nitrogen pollutant concentrations. This invention improves the adaptability of the PRB process to hydrogeological conditions, accelerates the start-up of the denitrification process, ensures denitrification effectiveness during the start-up phase, improves denitrification efficiency during operation, and extends remediation time.

The utility model discloses sewage treatment device belongs to sewage treatment technical field, and the existing fixed bed reactor is lack of water dissolved oxygen real -time monitoring and equipment linkage caused by the denitrification efficiency fluctuation problem of solution. Its technical scheme main points include: fixed bed reactor built -in biological carrier layer, backwash air blower is connected bottom air inlet through first pipeline, and water pump is connected water inlet end through second pipeline, and is connected top flushing port through third pipeline, sets up DO sensor on water inlet pipeline, and control system connects DO sensor, backwash air blower and water pump. The device is through real -time monitoring water dissolved oxygen and linkage control backwashing and flushing operation, guarantees the stable operation of depth denitrification process, and is mainly used for biochemical secondary sedimentation tank effluent's low carbon nitrogen ratio sewage treatment.

This invention discloses a laboratory apparatus for verifying the effect of pH on wastewater denitrification processes, relating to the technical field of wastewater treatment experimental equipment. It includes a wastewater denitrification reactor, a pH adjustment mechanism, and an inlet / outlet mechanism. The pH adjustment mechanism includes a pH sensor and a metering pump. The pH sensor detects the pH value of the nitrogen-containing experimental wastewater within the reactor body of the wastewater denitrification reactor, and the metering pump pumps a pH adjuster into the reactor body to maintain the pH value of the nitrogen-containing experimental wastewater. This invention primarily addresses the problem of providing laboratory equipment for verifying the effect of pH on wastewater denitrification processes. It can deeply reveal how pH affects the activity, enzyme function, and gene expression of microorganisms in traditional nitrification-denitrification processes, short-cut nitrification-denitrification processes, and anaerobic ammonia oxidation processes in wastewater denitrification.

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.

This invention relates to a short-cut nitrification-denitrification coupled with microaerobic biological treatment method based on MABR, belonging to the field of water treatment technology. The invention mainly consists of a two-stage MABR-PN / DN tank, a two-stage MABR microaerobic tank, a sedimentation tank, an air supply system, and a monitoring system. The MABR-PN / DN tank and the MABR microaerobic tank are respectively implanted with MABR membrane tanks. Wastewater is sequentially processed through the first-stage MABR-PN / DN tank, the first-stage MABR microaerobic tank, the second-stage MABR-PN / DN tank, the second-stage MABR microaerobic tank, and the sedimentation tank. The air supply system is separately set up, supplying air to the MABR-PN / DN tank and the MABR microaerobic tank through pipelines. This invention establishes a short-cut nitrification-denitrification and low-aerobic nitrification-denitrification process using a microbial membrane grown on the outer surface of the MABR membrane filaments as a carrier. Simultaneously, it utilizes the two-stage MABR-PN / DN tank and the two-stage MABR microaerobic tank, eliminating the need for an internal reflux system for nitrified liquid to remove nitrogen, thus improving the effluent indicators of urban wastewater treatment plants. This invention has advantages such as good pollutant removal effect, saving external carbon source addition, saving land, short treatment cycle, low energy consumption, and reduced sludge production.

This invention discloses a digital twin control system for an immobilized microbial denitrification process. The system includes: a data synchronization module for collecting data from the immobilized microbial denitrification reactor and generating an operating status sequence according to the same sampling period; and a mass transfer state inversion module for inverting the mass transfer resistance coefficient, effective reaction depth, and clogging risk level by integrating the time delay from influent nitrogen disturbance to effluent nitrogen response, bed pressure difference changes, recovery time after flow disturbance, and dissolved oxygen changes on the ammonia nitrogen removal rate. This invention relates to the field of wastewater treatment technology. This digital twin control system for an immobilized microbial denitrification process, through the mass transfer state inversion module, integrates the time delay from influent nitrogen disturbance to effluent nitrogen response, bed pressure difference changes, and recovery time after flow disturbance to improve the ability to identify hidden states within the immobilized carrier.

This invention relates to the field of environmental protection equipment, specifically to a pressure regulation device based on a dialysis-denitrification process. The device includes a pressure-regulating unit, which comprises a housing and a pressure-regulating rotating component. The housing has a chamber in which the pressure-regulating rotating component is rotatably disposed. The rotating component has an annular liquid passage, which includes a pressure-stabilizing section, a pressure-increasing section, and a pressure-relieving section. All three sections are arc-shaped, with the width of the pressure-relieving section greater than that of the pressure-stabilizing section, which is also greater than that of the pressure-increasing section. The center of the annulus coincides with the rotation center of the rotating component. One side of the housing has an inlet for connection to a pervaporation assembly, and the other side has an outlet, located on opposite sides of the liquid passage. The pressure-regulating rotating component at the pressure-increasing section has a larger blocking area than at the pressure-stabilizing section, which is also larger than that at the pressure-relieving section, for the inlet. This invention allows for micro-pressurization of the pervaporation assembly without the introduction of a pump, while minimizing the impact on the pressure of the dialysis assembly.

This invention relates to a device and method for dual-cycle refrigeration LNG helium extraction and light hydrocarbon recovery, belonging to the field of cryogenic liquefaction separation and natural gas helium extraction technology. The device integrates a mixed refrigerant refrigeration cycle and a nitrogen refrigeration cycle, and sequentially includes a feed gas pretreatment unit, a light hydrocarbon recovery unit, a denitrification liquefaction unit, and a helium extraction unit. The mixed refrigerant cycle provides cooling capacity for feed gas cooling liquefaction, light hydrocarbon recovery, and natural gas denitrification processes, while the nitrogen cycle provides deep cooling capacity for extracting crude helium from nitrogen-rich gas. In terms of method, the purified feed gas sequentially undergoes pretreatment, light hydrocarbon recovery, denitrification, and helium extraction steps to simultaneously produce LNG, crude helium, LPG, and stabilized light hydrocarbons. This invention has advantages such as high process energy efficiency, high helium and propane recovery rates, high purity of co-produced products, and reliable operation, realizing the high-value comprehensive utilization of natural gas resources.

This invention relates to the field of environmental protection technology and discloses a denitrification reactor and a method for flue gas denitrification. The denitrification reactor includes an outer shell and an inner liner. Superheated steam is introduced between the outer shell and the inner liner to heat the inner liner. The inner liner is further divided into a baffled mixing zone and a catalytic reaction zone. The flue gas is first heated to the temperature required for the catalytic reaction in the baffled mixing zone, and then enters the catalytic reaction zone to react. The catalytic reaction zone is always at a high temperature, which prevents the formation of ammonium salts that cover and block the fiber pores of the tube wall during the denitrification process. Furthermore, the heat utilization is more efficient. The three processes of flue gas heating, denitrification reaction, and dust removal can be completed with a single device. It can simply and quickly heat, denitrate, and remove dust from the flue gas to meet emission requirements. The operation is simpler, the denitrification index is stable, and the equipment has a long service life, making it more suitable for industrial applications.

The application provides a combined denitrification process method and device, relates to the field of sewage biological treatment technology, and the method comprises the following steps: connecting flocculent sludge of a sewage plant into a one-step PN / A reactor, forming PN / A granular sludge under condition constraints, carrying out short-cut nitrification reaction by using the one-step PN / A reactor with the sludge state being granular sludge, and obtaining effluent of the PN / A reactor; introducing the effluent of the PN / A reactor into a PD reactor, adding an organic carbon source into the PD reactor for short-cut denitrification, obtaining effluent of the PD reactor and introducing the effluent into an Anammox reactor for deep denitrification, obtaining effluent of the Anammox reactor, and discharging the effluent by a effluent storage tank. The application solves the technical problems that a large amount of carbon source needs to be added in the nitrification and denitrification processes in the prior art, the treatment process has high energy consumption, and the amount of residual sludge is large, and the technical effects of reducing the amount of added organic carbon source, reducing the energy consumption of sewage denitrification and the amount of residual sludge are achieved.

The utility model discloses a novel red mud desulfurization and denitrification process device, including boiling bed flue gas desulfurization and denitrification tower, spiral heating feeder, red mud feed buffer tank, cyclone separator, cloth bag dust collector and spiral returner, this technology takes red mud as desulfurization and denitrification agent, and the red mud enters boiling bed flue gas desulfurization and denitrification tower after heating and drying, and is fully contacted with flue gas under fluidized state, and the high efficient removal of NO x 、SO x In flue gas in red mud is utilized, and red mud desalination stabilization is realized simultaneously. After reaction, flue gas is separated and dusted to reach standard discharge, and the red mud that is not completely reacted can be recycled or discharged as resources. By strengthening gas-solid mass transfer, reaction efficiency is improved, desulfurization, denitrification and particulate matter removal integration are realized, and the utility model is suitable for industrial flue gas treatment of surrounding alumina plant or red mud yard, and has environmental protection and resource recycling benefits.

The application discloses a method for controlling disinfection by-products and biological toxicity of sewage based on a denitrification process and application in the technical field of sewage treatment, and aims at the problems that toxic disinfection by-products DBPs are easily generated and the biological toxicity of effluent is increased after the sewage is disinfected by adding chlorine. The carbon-nitrogen ratio, the hydraulic retention time and the temperature in the deep denitrification process are optimized in cooperation, the optimal coupling relationship between the temperature and the hydraulic retention time is explored, the regulation and control path of "process parameters-precursor-DBPs-toxicity" is established, the source control of DBPs is realized, and the biological toxicity of effluent is reduced. The application starts from the optimization of operation parameters in the sewage treatment process, does not need to add chemical agents or add complex equipment, can significantly reduce the ecological risk of the subsequent disinfection link while ensuring the denitrification effect, is simple to operate, low in cost, and suitable for the process optimization and upgrading of the existing sewage treatment plant.

The application discloses a kind of nano iron reinforced hydrolytic acidification-denitrification integrated treatment device and method, belong to low biodegradability industrial wastewater treatment field.The device is equipped with water regulating zone and nano iron reinforced synergistic reaction zone in integrated front-end reaction module.Processing, by adding nano iron material to synergistic reaction zone, while refluxing subsequent aerobic unit containing nitrate nitration liquid, under the regulation of nano iron, organic hydrolytic acidification and partial denitrification reaction are realized simultaneously, and the system is maintained stable operation by on-line monitoring and automatic control.The application integrates hydrolytic acidification and denitrification process in the same front-end unit, effectively solves the problems of low carbon-nitrogen ratio industrial wastewater carbon release and denitrification synergy, high subsequent treatment load, long process, etc., significantly improves the biodegradability and denitrification efficiency of wastewater, and is suitable for pharmaceutical, chemical, petrochemical and other low C / N industrial wastewater treatment, with compact process, stable operation, good treatment effect and other advantages.

The utility model relates to the technical field of flue gas desulfurization and denitrification, particularly relates to a flue gas desulfurization and denitrification process device, which can cool and dedust flue gas before desulfurization and denitrification, avoids the influence of subsequent flue gas desulfurization and denitrification, makes flue gas and desulfurization and denitrification solution contact more uniform and sufficient, improves the desulfurization and denitrification treatment effect of flue gas, and is more practical, including bottom plate, characterized by, the bottom plate top end left side is fixedly connected with the water storage tank, the bottom plate top end middle is fixedly connected with the flue gas treatment box, the bottom plate top end right side is fixedly connected with the liquid storage tank, is provided with the air inlet component between water storage tank and flue gas treatment box for conveying flue gas, is provided with the sprayer between flue gas treatment box and liquid storage tank for spraying desulfurization and denitrification solution.

This invention relates to the field of wastewater treatment technology and provides an efficient anaerobic ammonia oxidation denitrification process device, comprising a reactor body, a water distributor installed inside the reactor body, an exposure tube connected through the reactor body, an outlet pipe installed on one side of the reactor body, a three-phase separator fixedly connected inside the reactor body, a sedimentation tank installed below the three-phase separator, a buffer device installed inside the sedimentation tank, and a sludge removal device installed inside the reactor body. In this invention, during operation, when wastewater flows into the sedimentation tank from top to bottom, it first impacts the upper inclined plate, weakening the water flow energy and guiding it along the inclined plate to the lower inclined plate. Multiple inclined plates sequentially change the water flow direction and reduce the flow velocity, thereby effectively buffering the rapid inflow and preventing the water flow from directly impacting the sludge at the bottom of the sedimentation tank, avoiding the problem of sediment being disturbed and floating, thus effectively improving the separation efficiency of the sedimentation tank and the quality of the effluent.

The application discloses a biological filler for nitrogen removal enhancement of an aerobic tank and a preparation and application thereof, and successfully solves the problem of weak activity of denitrifying bacteria by loading three-layer biological fillers of inner-layer-denitrifying bacteria, middle-layer-conductive layer and outer-layer-nitrifying bacteria on the filler, and realizes rapid formation of a biofilm. In addition, a metal conductive layer is additionally arranged in the middle to participate in electron transfer in the microbial denitrification process, and the biofilm layers on both sides realize rapid formation of the biofilm, so as to realize nitrogen conversion and removal. The method can not only maintain the biological activity of the bacterial cells and realize rapid formation of the biofilm, but also promote separation of the bacterial cells and refractory organic matters, thereby reducing the toxic effect on the bacterial cells.