32results about How to "Efficient denitrification" patented technology

The invention discloses an aquaculture denitrification microcapsule as well as a preparation method and application thereof, and relates to the technical field of aquaculture and biology. The lactobacillus casei provided by the invention can secrete acid metabolites, and the acid metabolites can inhibit pathogenic vibrio, so that the occurrence of diseases in aquaculture can be reduced. Lactobacillus casei has the efficacy of efficiently degrading ammonia nitrogen and nitrite nitrogen in the aquaculture environment, and can continuously realize efficient cleaning of the aquaculture environment. In addition, the invention also provides a denitrification microcapsule which creates a more favorable microenvironment for the efficient denitrification strain, so that the repeated denitrification performance is more stably exerted, and the denitrification microcapsule can be repeatedly utilized.

The invention provides a synergistic accelerant suitable for SNCR (selective non-catalytic reduction) denitration and application of the synergistic accelerant. The synergistic accelerant comprises the following components in parts by weight: 2-80 parts of an activating agent, the activating agent is selected from at least one of sodium glycinate, sodium glutamate, sodium iminodiacetate, sodium aspartate, sodium aminopropionate, sodium aspartate and potassium aspartate; 3-12 parts of a catalyst, wherein the catalyst is selected from soluble heteropolyacid; 1-10 parts of a catalytic promoter; the catalytic promoter is selected from at least one of soluble tungstate and molybdate. A trace amount of synergistic accelerant is added into a common SNCR denitration solution, so that the reaction speed of NOx and reducing agents such as ammonia or urea can be increased, a temperature window of SNCR reaction moves downwards, the application range of the traditional SNCR technology is expanded, the removal efficiency of NOx is improved, and a low-cost and high-efficiency method is provided for pollution abatement of nitric oxide in waste gas.

The invention relates to a ship flue gas denitration, desulfurization and decarburization system, the ship flue gas denitration, desulfurization and decarburization system comprises a denitration mechanism, a desulfurization mechanism, a decarburization mechanism and a carbon dioxide preparation mechanism, the flue gas input end of the denitration mechanism is used for receiving ship flue gas, and the flue gas output end of the denitration mechanism is connected with the flue gas input end of the desulfurization mechanism; the flue gas output end of the desulfurization mechanism is connected with the flue gas input end of the decarburization mechanism, solid amine to be reacted which is used for reacting with desulfurized flue gas to generate decarburized flue gas is arranged in the decarburization mechanism, and saturated solid amine is generated after the solid amine to be reacted reacts with the desulfurized flue gas; the carbon dioxide preparation mechanism is used for heating the saturated solid amine to generate carbon dioxide and to-be-reacted solid amine, and the solid amine output end of the carbon dioxide preparation mechanism conveys the to-be-reacted solid amine into the decarburization mechanism. By optimizing the recycling of the solid amine, the occupied space and the requirement for the equipment size are reduced, and the ship flue gas treatment efficiency and compactness are improved.

The invention relates to the technical field of environmental microorganisms and sewage treatment, and provides a cold-resistant sulfur autotrophic denitrifying bacterium and application thereof, the sulfur autotrophic denitrifying bacterium is thiobacillus denitrificans SZG-SAD-004, and the preservation number of the sulfur autotrophic denitrifying bacterium is CCTCC (China Center for Type Culture Collection) NO: M2023992. The Thiobacillus denitrificans SZG-SAD-004 disclosed by the invention can help a sulfur autotrophic denitrification device to be quickly started at a low temperature, the normal-temperature starting efficiency is achieved, meanwhile, efficient denitrification can still be performed at the temperature of 6-15 DEG C, the low-temperature tolerance performance and the denitrification performance are strong, and the Thiobacillus denitrificans SZG-SAD-004 has a very high application value.

This invention relates to a bacterial consortium capable of highly efficient denitrification at low temperatures and its applications. The bacterial consortium LH28 provided by this invention possesses highly efficient denitrification capabilities, able to remove nitrogen pollution under low-temperature conditions. After screening and optimization, under conditions of sodium acetate as the carbon source, a C / N ratio of 20, pH 7, a temperature of 15°C, a rotation speed of 180 rpm, and an inoculum size of 10%, the consortium can remove 98.9% of 200 mg / L ammonia nitrogen and 63.2% of nitrate concentration within 36 hours. This invention also provides a cultivation method and degradation treatment steps for this bacterial consortium, ensuring its stability and efficiency in practical operation. Experimental data show that compared to traditional methods with poor low-temperature adaptability, long treatment times, and high costs, this bacterial consortium significantly improves the treatment effect when treating nitrogen-containing wastewater, demonstrating significant advantages and broad application prospects.

The invention discloses a preparation method of a high-efficiency photocatalyst and a method for enhancing Fenton flue gas denitration by using the photocatalyst, and belongs to the technical field of photocatalysis-oxidation wet denitration. The preparation method comprises the following steps: firstly, taking tetrabutyl titanate as a Ti source, taking a hydrofluoric acid solution as a crystal face regulator, and carrying out solvothermal reaction to obtain F-TiO2 with a high (001) crystal face; and uniformly mixing sodium iodate serving as an electron sacrificial agent, cobalt salt serving as a Co precursor and the high (001) crystal face F-TiO2 serving as a carrier, and generating cobalt oxide which is selectively loaded on the high (001) crystal face titanium dioxide under the condition of ultraviolet light, thereby obtaining the CoOx-coated F-TiO2 photocatalyst. And the F-TiO2 photocatalyst and the CoOx coated F-TiO2 photocatalyst are used for flue gas Fenton denitration. The problem that excessive Fe (III) is accumulated in Fenton denitration is solved, iron circulation in the reaction is accelerated, and the denitration capacity of the Fenton reaction is improved.

The invention belongs to the technical field of chemical engineering separation, and provides a natural eutectic solvent and a preparation method and application thereof, the natural eutectic solvent comprises the following components: caprolactam, citric acid and water; wherein the molar ratio of caprolactam to citric acid is (1-4): (1-2); the mass of the water is 20-40% of the sum of the mass of the caprolactam and the mass of the citric acid. By introducing water as a third component, the viscosity of the system is effectively reduced, the mass transfer performance is improved, and the denitrification efficiency is improved. The eutecticevaporate solvent provided by the invention can provide more reaction sites, has relatively strong removal capacity and selectivity on nitrogenous organic matters, and can realize efficient denitrification under mild conditions. The natural deep-eutectic solvent prepared by the preparation method disclosed by the invention is applied to removal of basic nitrides of oil products, and has the advantages of short time consumption and low dosage, namely high removal efficiency.

This application relates to the field of wastewater treatment and discloses a wastewater treatment method and equipment based on short-cut nitrification coupled with anaerobic ammonium oxidation. The method includes adding raw sludge to a reactor; adding wastewater to be treated to the reactor for screening treatment according to a first preset influent time to form pretreated wastewater, wherein the pretreated wastewater includes semi-finished wastewater and semi-finished sludge, the semi-finished sludge containing short-cut nitrifying bacteria; adding wastewater to be treated to the reactor for incremental treatment according to a second preset influent time to form secondary treated wastewater, wherein the secondary treated wastewater includes secondary treated wastewater and short-cut nitrifying bacteria inoculum; adding the wastewater to be treated and anaerobic ammonium oxidation bacteria inoculum to the reactor for coupled treatment to form dischargeable wastewater, wherein the dischargeable wastewater includes dischargeable clarified liquid and finished sludge. The wastewater treatment method based on short-cut nitrification coupled with anaerobic ammonium oxidation of this application can achieve deep denitrification of high-nitrogen, low-carbon wastewater.

The present invention relates to air pollution prevention and control materials in energy-saving and environmental protection industries; solid waste pollution disposal, resource recycling and other fields, and in particular to a denitration catalyst, and a preparation method thereof, and its application in the field of high-temperature denitration. The preparation method of the denitration catalyst of the present invention comprises: step A, stirring zeolite with silica sol, filtering and drying, calcining and ball milling to obtain powder one; step B, mixing powder one with alumina and synthetic molecular sieve in proportion and grinding to obtain powder two; step C, adding powder two to a solution of copper salt and cerium salt, stirring, filtering and washing, and obtaining slurry; step D, drying the slurry, and separating to obtain a denitration catalyst. The main body of the denitration catalyst of the present invention is zeolite modified by silica sol and activated alumina, and the synthesis process is simple, easy to industrialize, and the production cost is low.

The invention discloses a fiber ceramic-based catalytic filter element for denitration of industrial flue gas and a preparation method of the fiber ceramic-based catalytic filter element, and belongs to the technical field of catalytic filter elements. According to the preparation method, firstly, a chelating agent is introduced in the preparation process of TiO2 sol to improve the dispersity and particle size uniformity of TiO2 nanoparticles, the chelating agent can effectively adjust the hydrolysis rate of butyl titanate by means of the strong coordination acting force of the chelating agent and titanium ions, and high-dispersity and small-particle-size TiO2 sol is constructed; then, the fiber ceramic base material is immersed in the TiO2 sol, a firm TiO2 coating is formed after calcination, the firm TiO2 coating serves as a carrier with a high specific surface area, and the binding force between the firm TiO2 coating and the base material is enhanced; the preparation method comprises the following steps: firstly, preparing a TiO2 coating, then dipping a solution containing vanadium and tungsten precursors onto the composite carrier, and calcining to form a main active component V2O5 and a cocatalyst WO3 which are highly dispersed on the surface of the TiO2 coating to form selective catalytic reduction active sites, thereby finally obtaining the fiber ceramic-based catalytic filter element which is good in blocking resistance, water-resistant, sulfur-resistant and high-temperature-resistant and can be used for industrial flue gas denitration.

The application discloses a bismuth-nickel-iron composite oxide catalyst, a preparation method and application. A bismuth source, a nickel source and an iron source are dissolved in a mixed solvent of ethanol and ethylene glycol, and then are fully stirred to obtain a mixed solution; oil amine and urea are added into the mixed solution, and after ultrasonic mixing, the mixture is moved to a polytetrafluoroethylene reaction kettle for a solvothermal reaction; after the reaction solution is cooled, the product is washed, dried and calcined, and finally the bismuth-nickel-iron composite oxide catalyst is obtained. The application prepares a spinel nanometer catalyst with stable performance, the NO removal rate of which reaches 90% at 175 DEG C, the denitration efficiency of which is as high as 100% at 225 DEG C, the medium-low temperature denitration performance of which is excellent, and the catalyst has the characteristics of high CO-SCR denitration efficiency and magnetic recyclability. In addition, proper bismuth doping is beneficial to improving the sulfur resistance of the nickel-iron catalyst, and thus the catalyst has a wide application prospect.

The invention discloses a membrane bioreactor for rapidly starting a short-cut nitrification-anaerobic ammonia oxidation process and a starting strategy. Treatment grading, biological phase splitting and mud-membrane coexistence are one of the advantages of the membrane bioreactor. In the activated sludge, ammonia oxidizing bacteria are dominant bacteria and are mainly subjected to nitrosation reaction; and on the filler, the anaerobic ammonium oxidation bacteria are dominant and play an anaerobic ammonium oxidation role. In order to solve the problem of low mass transfer efficiency of a traditional membrane bioreactor, a stainless steel filler frame is directly welded to a stirring paddle supporting rod, and the filler frame can rotate along with a stirring paddle at the same frequency. The sponge filler is used, so that sufficient living space is provided for microorganisms, the use amount of anaerobic ammonia oxidation seed sludge when the process is started is reduced, and the starting time is shortened. The method is beneficial to solving the problems of lack of anaerobic ammonia oxidation seed sludge, difficulty in interception and enrichment of microorganisms and low mass transfer efficiency, and has huge potential and application value in treatment of high-ammonia-nitrogen industrial wastewater.

The invention discloses an application of pseudomonas paraxanthohuensis in biological nitrogen removal and sewage treatment. The invention belongs to the technical field of biology, and particularly relates to application of pseudomonas paraxanthoceras in biological denitrification and sewage treatment. The pseudomonas paraxanthomonas disclosed by the invention can be applied to the following aspects: (a1) biological nitrogen removal; (a2) preparing a biological denitrification product; (a3) sewage treatment; and (a4) preparing a product for sewage treatment. As a heterotrophic bacterium, the strain 1.15632 disclosed by the invention has the capability of converting ammonia into nitrogen under an aerobic condition, and also has good ammonia nitrogen and total nitrogen removal capability. The pseudomonas paraxanthoceras shows great application potential in the aspects of improving the sewage treatment effect, reducing the cost and energy consumption and the like.

The utility model discloses a composite catalyst filter tube for denitration and catalytic removal of VOCs (Volatile Organic Compounds) in a wide temperature range, which comprises a ferromanganese catalyst layer, a vanadium-titanium catalyst layer and a noble metal catalytic oxidation layer which are sequentially arranged along a waste gas transmission direction, and the ferromanganese catalyst layer can perform denitration treatment on waste gas within a temperature range of 100-300 DEG C; the vanadium-titanium catalyst layer can play a denitration role in an environment of 250-500 DEG C; the precious metal catalytic oxidation layer can assist the denitration reaction of the medium-high temperature section and can also catalyze and remove VOCs in the waste gas. The filter tube can be used for efficiently denitrating waste gas within the range of 100-500 DEG C, and can also be used for catalytically removing VOCs (Volatile Organic Compounds) at the same time.

The present application relates to the field of microorganism and water ecological restoration technology, and more particularly to a bacillus tolerant to the rhizosphere environment of submerged plants and its application in water denitrification. Bacillus licheniformis The bacillus includes bacillus licheniformis HY76, which is classified as HY76, and the preservation number is CCTCC NO: M 20261154. It can tolerate the multiple stress conditions of phenolic acid, sulfur-reducing substances and low oxygen in the rhizosphere environment of submerged plants, and can also achieve efficient denitrification and phenolic acid conversion under this condition, providing an efficient solution for water restoration of submerged plants.

The present invention discloses a steroid drug production wastewater treatment system, a comprehensive oxidation tank and a working method thereof. The steroid drug production wastewater treatment system of the present invention is used to treat wastewater generated in the production process of steroid drug intermediates, and includes a regulating tank, a USR reactor, a UASB reactor, a comprehensive oxidation tank, a hydrolysis acidification tank, an SBR tank and a flotation sedimentation tank connected in series from front to back. The production wastewater is collected in the regulating tank, and finally the drain pipe outputs the supernatant of the flotation sedimentation tank; the comprehensive oxidation tank performs facultative and aerobic treatment on organic matter in the wastewater in different regions. The present invention also discloses a comprehensive oxidation tank used in the steroid drug production wastewater treatment system and a working method thereof. The present invention performs deep biochemical treatment on wastewater to meet the discharge requirements.

The present application relates to a reactor, reaction system and method for denitrification-coupled polyhydroxyalkanoates based on hydrogen energy. The reactor comprises: a membrane bundle composed of a plurality of polypropylene polyurethane composite hollow fiber membranes, which is used to supply hydrogen autotrophic denitrification PHA synthesis functional bacteria to form a biofilm on the surface of the hollow fiber membrane; a liquid storage tank operatively connected to the membrane bundle, which stores an inorganic carbon denitrification culture solution for selectively enriching and culturing the functional bacteria from sludge; wherein the hydrogen autotrophic denitrification PHA synthesis functional bacteria are used to denitrify and reduce carbon in sewage and generate PHA, including one or more of hydrogen autotrophic denitrification PHA synthesis bacteria, hydrogen autotrophic denitrifying bacteria, hydrogen autotrophic acid-producing bacteria, heterotrophic denitrifying bacteria, and heterotrophic PHA synthesis bacteria. The present invention realizes for the first time the organic combination of wastewater nitrate nitrogen removal process and PHA synthesis, and utilizes CO 2 As the only carbon source, it realizes a disruptive transformation from carbon emissions to carbon fixation.

The invention discloses a rotating tower type multi-stage tidal flow constructed wetland system and a sewage treatment method, the rotating tower type multi-stage tidal flow constructed wetland system comprises a central purification wetland, a plurality of layers of annular wetlands are sequentially installed outside the central purification wetland from high to low in a surrounding mode, each layer of annular wetland is composed of a plurality of fan-shaped purification units, a water inlet is formed in the upper end of the central purification wetland, a first rotary drainer is mounted at the top of the first water collection channel, a second rotary drainer is mounted at the top of the second water collection channel, and the first rotary drainer is used for draining water to the tops of the adjacent annular wetlands in a rotary falling manner; the second rotary drainer is used for rotatably draining water to the top of the annular wetland on the outer layer in a waterfall manner. The central purification wetland surrounds the multiple layers of coaxial annular wetlands outside the central purification wetland, and the first rotary drainer and the second rotary drainer are used for draining water in a rotary falling manner, so that a tidal flow effect is formed, and efficient denitrification of sewage is realized.

The utility model relates to a kind of ammonia water spraying devices of denitration system, including pressure pump, ammonia water collection unit, flue gas conveying pipe, ammonia water primary atomization unit, ammonia water secondary atomization unit, pressure pump is installed in the air inlet shell outside of denitration system, and air inlet shell is inverted L shape, ammonia water primary atomization unit is set in the upper portion in air inlet shell and is connected with pressure pump, ammonia water collection unit is set in ammonia water primary atomization unit below, for collecting the redundant ammonia water that ammonia water primary atomization unit sprays, ammonia water secondary atomization unit is set on ammonia water collection unit, for the redundant ammonia water collected is atomized again.The utility model can collect the redundant ammonia water that sprays, and under the action of ammonia water secondary atomization unit, the ammonia water collected is atomized, not only can avoid ammonia water waste, ammonia water spraying can be increased, effectively improve ammonia water and flue gas mixing, more efficiently carry out denitration.

The invention discloses an echelon utilization method of nitrate-containing wastewater, which comprises the following steps: S1, catalyst preparation: preparing a carbon fiber loaded metal particle catalyst by using metal nitrate in the nitrate-containing wastewater through soaking loading and Joule heat treatment; and S2, electrochemical reduction: assembling the catalyst into a membrane electrode assembly, and reducing nitrate ions in the nitrate-containing wastewater used in the step S1 or from another source into ammonia under an electrochemical condition. The method realizes synergetic recycling of metal ions and nitrate ions in the wastewater, forms a closed-loop process of treating waste with waste and turning waste into wealth, has the advantages of no secondary pollution, low cost, stable catalytic performance and capability of producing high-added-value ammonia products, and is suitable for nitrate-containing wastewater treatment in industries such as agriculture, photovoltaics, semiconductors and the like.

The invention discloses an urban sewage advanced treatment system and a sewage treatment process, and relates to the technical field of sewage treatment.The urban sewage advanced treatment system comprises an oxidation assembly and a denitrification biological filter, the oxidation assembly comprises an oxidation pond, activated carbon and a peracetic acid feeder, the activated carbon is located in the oxidation pond, and the peracetic acid feeder is located in the denitrification biological filter; the peracetic acid supplier is connected with the oxidation pond and is used for inputting peracetic acid into the oxidation pond. The denitrification biofilter comprises a tank body and a filler layer, the tank body is connected with the oxidation tank, the filler layer is arranged in the tank body, the filler layer is located below a water outlet of the oxidation tank, and the filler layer is composed of a plurality of porous ceramsite. The peroxyacetic acid feeder can input peroxyacetic acid into the oxidation pond, the peroxyacetic acid can oxidize organic pollutants difficult to degrade in sewage into organic pollutants easy to be utilized by microorganisms, meanwhile, the peroxyacetic acid is converted into acetic acid, and the acetic acid can provide a carbon source for the subsequent denitrification process after flowing into the denitrification biofilter. The sewage can be deeply purified.

The invention relates to the technical field of microorganisms, in particular to acinetobacter YYD-3 and application of the acinetobacter YYD-3, and the preservation number of the acinetobacter YYD-3 is CGMCC (China General Microbiological Culture Collection Center) No.29528. The acinetobacter YYD-3 provided by the invention shows strong adaptability and efficient denitrification capacity to different initial ammonia concentrations, has wide pH value adaptability, and can realize efficient denitrification of sewage in neutral, slightly alkaline and alkaline environments; in addition, the acinetobacter YYD-3 has certain salinity tolerance, and is suitable for being applied to treatment of various salt-containing wastewater. Compared with the prior art, the acinetobacter YYD-3 can realize one-stop efficient removal of ammonia nitrogen in a medium and low temperature environment, especially can realize long-time colonization in activated sludge, and remarkably improves the ammonia nitrogen removal capability of a sewage treatment system.

The utility model relates to the technical field of denitration, and provides a denitration reaction device which comprises a denitration tank, a denitration motor is arranged at the top of the denitration tank, a main breather pipe is arranged at the output end of the denitration motor, and the output end of the denitration motor penetrates through the top of the denitration tank and is connected to the main breather pipe. A plurality of groups of branch breather pipes are uniformly and symmetrically arranged on the side wall of the main breather pipe, fan blades are arranged below the branch breather pipes, spray pipes are uniformly arranged above the branch breather pipes, and the main breather pipe, the branch breather pipes and the spray pipes are all communicated; the rotation of the fan blades and the spraying of ammonia gas of the spraying pipe form a synergistic effect, so that the flue gas and the ammonia gas are fully mixed, the catalytic reaction is accelerated, the efficiency of the whole denitration process is improved, the purpose of efficient denitration is finally achieved, the denitration effect is optimized in the process, the denitration rate is also improved, and the service life of the denitration device is prolonged. Powerful guarantee is provided for industrial waste gas treatment.

The present application relates to a ship flue gas denitration, desulfurization and decarbonization system, which includes a denitration mechanism, a desulfurization mechanism, a decarbonization mechanism and a carbon dioxide preparation mechanism, wherein the flue gas input end of the denitration mechanism is used to receive ship flue gas, the flue gas output end of the denitration mechanism is connected to the flue gas input end of the desulfurization mechanism, the flue gas output end of the desulfurization mechanism is connected to the flue gas input end of the decarbonization mechanism, the decarbonization mechanism is provided with a solid amine to be reacted for reacting with the desulfurized flue gas to generate decarbonized flue gas, the solid amine to be reacted generates saturated solid amine after reacting with the desulfurized flue gas, the carbon dioxide preparation mechanism is used to heat the saturated solid amine to generate carbon dioxide and the solid amine to be reacted, and the solid amine output end of the carbon dioxide preparation mechanism transports the solid amine to be reacted to the decarbonization mechanism. By optimizing the recycling of solid amine, the space occupation and equipment size requirements are reduced, and the efficiency and compactness of ship flue gas treatment are improved.

This invention relates to the field of wastewater treatment technology, and more particularly to a method for enhancing anaerobic ammonia oxidation (AAO) denitrification using iron-loaded polyurethane porous materials. The method includes the following steps: Anaerobic ammonia oxidation sludge, iron-loaded polyurethane porous materials, and wastewater containing ammonia nitrogen and nitrite nitrogen are thoroughly mixed in an anaerobic reactor and reacted under anaerobic conditions at a temperature of 31-35°C. The iron-loaded polyurethane porous materials are prepared as follows: polyurethane sponge is selected as a carrier, cut and cleaned, and then immersed and stirred in a mixed iron salt solution for a period of time. The pH of the mixed solution is adjusted to alkaline, resulting in the formation of a red precipitate. The iron-loaded polyurethane porous materials are then hydrothermally synthesized. The mixed iron salt solution includes ferric chloride and ferric nitrate. The carrier material prepared by this invention, when applied to an anaerobic ammonia oxidation system, can effectively shorten the process start-up time, promote the enrichment and biofilm formation of anaerobic ammonia oxidizing bacteria, and achieve a high total nitrogen removal rate.

The invention relates to the technical field of sewage treatment, and particularly discloses a complex microbial inoculant embedded pellet and a preparation method and application thereof, the method comprises the following steps: respectively inoculating Pseudomonas stutzeri CICC-10428 and Pseudomonas stutzeri XL-2 into a culture medium, culturing at 25-35 DEG C to a stable initial stage, then centrifuging at 4-6 DEG C, and removing supernate to obtain the complex microbial inoculant embedded pellet. Washing and re-suspending for three times by using a buffer solution, and then mixing the pseudomonas stutzeri CICC-10428 and the pseudomonas stutzeri XL-2 to obtain a compound bacterium suspension; the preparation method comprises the following steps: adding polyvinyl alcohol and sodium alginate into water, heating, uniformly mixing, and cooling to room temperature to obtain gel; the preparation method comprises the following steps: adding a gel into a compound bacterium suspension, uniformly mixing to obtain a mixed gel bacterium solution, then sucking the mixed gel bacterium solution, dropwise adding the mixed gel bacterium solution into a cross-linking agent, cross-linking at 4-6 DEG C for 24-48 hours, washing with sterile water for 3 times, and drying to obtain the compound bacterium agent embedded pellets. The denitrification effect of the recirculating aquaculture wastewater reactor can be improved, the addition amount of an extra carbon source is reduced, and the operation cost of a recirculating aquaculture plant can be greatly reduced.

The utility model relates to a kind of improved multi-point water inlet sewage treatment device, it is related to sewage treatment technical field, and mainly including water inlet system, gas supply system, MABR-A1 pool, MABR-O pool, MABR-A2 pool, O pool, sedimentation tank and phosphorus removal pool, water inlet system includes first water inlet, second water inlet and third water inlet, first water inlet is set in MABR-A1 pool front end, second water inlet is set in MABR-O pool front end and third water inlet is set in MABR-A2 pool front end;MABR-A1 pool, MABR-O pool, MABR-A2 pool, O pool and sedimentation tank are sequentially connected;Sedimentation tank effluent enters phosphorus removal pool, and after further removal of phosphorus by phosphorus removal pool, discharge system outside. Using MABR process and conventional water treatment combined packing combination use, adopt three-point water inlet, make full use of carbon source, nitration liquid stage backflow, degrade water pollutant, realize water treatment efficient operation. The utility model has the advantages of no sludge backflow, good treatment effect, less or zero additional external carbon source, efficient denitrification, low operating cost.

The invention discloses an oxygen group-hydrogen group double-membrane sewage ultimate denitrification and carbon reduction system and method, belongs to the field of sewage treatment, and particularly relates to an oxygen group-hydrogen group double-membrane sewage denitrification and carbon reduction system and method. The invention aims to solve the problems that the removal effect of total nitrogen in wastewater is poor due to the limitation of a carbon source under the condition of low carbon-nitrogen ratio in the traditional denitrification process, and the aeration bio-membrane reactor is difficult to realize stable and synchronous nitrification and denitrification. The oxygen group-hydrogen group double-membrane sewage ultimate denitrification and carbon reduction system consists of a membrane aeration biological membrane reaction system (MABR), a hydrogen group biological membrane reaction system (H2-MBfR) and a control system, and constructing an oxygen group-hydrogen group double-membrane system by using the hydrogen-based gas-permeable membrane reactor and the aeration bio-membrane reactor so as to realize deep removal of COD and TN in the wastewater with the low carbon-nitrogen ratio. The system disclosed by the invention can be formed by connecting an aeration biological membrane reaction system and a hydrogen-based biological membrane reaction system in series, can also be used for directly culturing oxygen-based and hydrogen-based biological membranes in one reaction system at the same time, and is suitable for different scenes.

The invention relates to a hot air supply system and method for preparing white carbon black through rice hull gasification. The hot air supply system comprises a rice hull gasification device, a first-stage gas-gas heat exchanger, a filter bag dust collector, a second-stage gas-gas heat exchanger, a waste heat boiler, an air mixing device and an SCR denitration device. The rice hull gasification device is used for outputting dust-containing fuel gas after rice hull gasification, and the dust-containing fuel gas is subjected to primary cooling through a primary gas-gas heat exchanger and subjected to dust removal through a filter bag dust remover to obtain clean fuel gas; the clean fuel gas is secondarily cooled by the secondary gas-gas heat exchanger and is combusted in the waste heat boiler to form high-temperature flue gas, and the high-temperature flue gas is cooled by the air mixing device and is changed into clean flue gas after passing through the SCR denitration device; clean flue gas sequentially passes through the second-stage gas-gas heat exchanger and the first-stage gas-gas heat exchanger to be subjected to heat exchange and temperature rise to form target clean flue gas, the target clean flue gas is used for preparing white carbon black, after waste heat is utilized, the target clean flue gas is directly discharged, and a chimney and an induced draft fan do not need to be used. The technical problems that in the prior art, a device is complex in process, high in energy consumption and poor in operation stability are solved.

The invention relates to the technical field of sewage denitrification, in particular to a rotational flow fluidization deep denitrification device and a process thereof, the rotational flow fluidization deep denitrification device comprises a main reaction drum, a first water inlet pipe, a second water inlet pipe and a three-phase separation structure; a sulfur autotrophic filler is arranged in the main reaction drum; the first water inlet pipe and the second water inlet pipe are arranged at the lower end of the main reaction drum and used for communicating the inside and the outside of the main reaction drum, the first water inlet pipe and the second water inlet pipe are arranged at intervals in the circumferential direction of the main reaction drum, and the axes of the first water inlet pipe and the second water inlet pipe are arranged in parallel; the second water inlet pipe is used for inputting clear water into the main reaction drum; the three-phase separation structure is arranged in the main reaction barrel and is used for separating sulfur autotrophic filler, water and gas. When the rotational flow fluidization deep denitrification device is used, blockage is avoided, the denitrification efficiency is improved, the occupied area is reduced, and the stability is higher.