71 results about "Sulphur oxidation" patented technology

The invention relates to the technical field of sewage treatment, and particularly provides a method and a system for realizing beneficiation wastewater N, N-diethyldithiocarbamate-C-N-S synergistic oxidation-reduction coupling treatment by an MABR oxygen layering process. According to the method and the system, a time sequence dissolved oxygen (DO) dynamic regulation and control strategy is innovatively developed: through periodic / pulse type switching anaerobic-hypoxia-aerobic conditions, oxygenolysis and ammonification reaction of N, N '-diethyldithiocarbamate are intensified directionally, and toxicity inhibition of intermediate products on functional bacteria is relieved. Based on the strategy, the system can accurately utilize biological membrane oxygen gradient spatial distribution in a single MABR reactor to realize a cascade reaction of sulfur oxidation-ammonification-aerobic nitrification-anoxic denitrification of ethyl sulfur nitrogen; or aiming at high-concentration diethyldithiocarbamate (gt; 50 mg / L) is coupled with a front anaerobic reactor, and ammoniation detoxification and denitrification nitrogen removal are enhanced.

The invention discloses a sulfur-oxidizing bacterium screening and enriching nutrient solution, a sulfur-oxidizing bacterium enriching method and a deodorizing method. The sulfur-oxidizing bacterium screening and enriching nutrient solution comprises 1.0 g.L <-1 > of K2HPO4, 0.5 g.L <-1 > of NaHCO3, 0.05 g.L <-1 > of NH4Cl, 0.225 g.L <-1 > of Na2S. 9H2O and 0.001 g.L <-1 > of trace elements, wherein the trace elements comprise 0.5 g.L <-1 > of EDTA (Ethylene Diamine Tetraacetic Acid), 0.01 g.L <-1 > of (NH4) 6Mo7O24. 4H2O, 0.04 g.L <-1 > of ZnSO4. 7H2O, 0.03 g.L <-1 > of MnCl2. 7H2O, 0.02 g.L <-1 > of CuSO4. 5H2O The deodorization performance of the municipal sewage treatment plant is improved through synchronous desulfurization and deamination of the acidophilic sulfur-oxidizing bacteria, and compared with a traditional deodorization process, the synchronous desulfurization and deamination process can enrich high-abundance sulfur-oxidizing bacteria in a short time and shows higher ammonia gas and hydrogen sulfide removal capacity.

The invention discloses a catalytic electrode which comprises a substrate, and an anti-corrosion layer and a sulfur-phobic layer which are sequentially attached to the substrate, the substrate is a blank foamed nickel substrate, the anti-corrosion layer is formed by dipping the foamed nickel substrate with a ferric salt solution, and the sulfur-phobic layer is formed by processing a precursor with a cobalt salt solution through electro-deposition. Accordingly, a corresponding preparation method is also established, a blank foamed nickel substrate is adopted, firstly, the foamed nickel substrate is subjected to dipping treatment with an iron salt solution to obtain a precursor with an anti-corrosion layer, and then the precursor is subjected to electro-deposition treatment with a cobalt salt solution to form the sulfur-phobic layer on the anti-corrosion layer. Wherein the anti-corrosion layer can isolate a high-sulfur environment and prevent the substrate from being corroded; the sulfur phobic layer may prevent sulfur products from depositing and passivating the electrode. The catalytic electrode provided by the invention solves the problems of sulfur reaction corrosion and passivation, shows excellent catalytic activity and stability, and can be used for catalyzing sulfur oxidation reaction for a long time. In conclusion, the method has the advantages of mild conditions, simple process, economy and practicability, and has obvious large-scale industrial production potential.

The present application relates to a kind of shiff base metal complex liquid desulfurizer and its preparation method and use, by amine and aldehyde condensation preparation the structure in the shiff base ligand containing C=N double bond, the lone pair electron of nitrogen atom on shiff base and metal atom are mutually cooperated to form shiff base metal complex, under the condition of oxygen or air as activating agent, the catalyst can be oxidized into inorganic sulfur with organic sulfur.The shiff base metal complex liquid desulfurizer of the present application is synthesized by low-cost raw material, without adding desulfurizer in the desulfurization process, solve the problems such as large amount of existing desulfurizer, need to be added continuously.At the same time, the desulfurizer is liquid desulfurizer, increase the contact area with organic sulfur gas, improve the desulfurization efficiency, the desulfurization rate of methyl mercaptan is higher than 99%.

The invention relates to a method for regulating and deacidifying in a bioleaching process of low-grade copper sulphide ore, aiming at the problem of excessive acid caused by excessive oxidation of pyrite in a dump leaching system, a thiocyanate bactericide is added into the bioleaching system of the low-grade copper sulphide ore, and the thiocyanate bactericide is dissolved in a spray liquid of the bioleaching system, and is added into the spray liquid of the bioleaching system; under the catalytic action of mineral leaching microorganisms, oxidation of ferrous ions is enhanced, so that the oxidation-reduction potential of a solution is increased, oxidation of pyrite is intensified, acid accumulation is excessive, the thiocyanate bactericide can remarkably inhibit the activity of part of sulfur-oxidizing bacteria and even kill part of sulfur-oxidizing bacteria, and therefore the activity of ferrous oxide is reduced; compared with the prior art, the method has the advantages that the sulfur oxidation activity of microorganisms is greatly influenced, but the oxidation influence on iron is relatively small, so that the acid leaching is reduced under the condition that the copper leaching of the copper sulfide ore is not influenced, the copper leaching is not influenced, the acid leaching is reduced, the production cost is reduced, the environmental influence is reduced, and the like.

The invention discloses a thermal power plant boiler flue gas desulfurization and denitrification integrated method, namely, a chemical absorption and catalytic reduction combined mode is researched to effectively treat sulfur oxide sulfur (SO2) and nitrogen oxide (NOx). The method comprises the following steps: firstly, converting sulfur-containing emissions into harmless substances by using a redox agent through a wet desulphurization technology, and then converting NOx into nitrogen and water by applying a selective catalytic reduction (SCR) technology. Operation data analysis shows that the removal rates of SO2 and NOx respectively reach 97% and 94%, and the desulfurization and denitrification efficiency is far higher than that of a traditional thermal power plant boiler. According to the desulfurization and denitrification integrated technology, the limitation of a traditional desulfurization and denitrification technology is broken through, and a new technical scheme is provided for a thermal power plant.

The present application relates to the technical field of health, environmental management and resource development, and discloses an alkaline-sulfur oxidizing bacteria and its application in water pollution treatment and bioleaching. The alkaline-sulfur oxidizing bacteria is named 381-2, which has been preserved in the China General Microbiological Culture Collection Center on December 23, 2024, and the preservation number is CGMCC No. 33017; the microbial classification name is Stutzerimonas sp. The present application isolates a new species of Stizolobium strain from a deep-sea hydrothermal area Stutzerimonas sp. . The strain has strong and rapid oxidation ability of thiosulfate ions, and also has the characteristics of producing alkali, so it can be applied to the fields of water pollution treatment and bioleaching.

The present disclosure discloses the identification and introduction of a specific heterologous gene encoding an alpha-1,2-fucosyltransferase (denoted smob) into LNT producing strains for the specific production of LNFP-I. The smob gene is derived from the microorganism Sulfuriflexus mobilis (https: / / www.dsmz.de / collection / catalogue / details / culture / DSM-102939), a sulfur-oxidizing bacterium isolated from a saline lake sediment.

The invention relates to the technical field of sanitation, environmental governance and resource development, and discloses an alkali-producing sulfur oxidizing bacterium and application thereof in water pollution governance and bioleaching. The alkali-producing sulfur-oxidizing bacterium is named as 381-2, is preserved in China General Microbiological Culture Collection Center (CGMCC) on December 23, 2024, and has a preservation number of CGMCC No.33017; the microbial classification is named as Stutzerimonas sp., and the microbial classification is named as Stutzerimonas sp. According to the invention, a new species strain Stutzerimonas sp. Of Stutzerimonas sp. Is obtained by separation from a deep sea hydrothermal zone. The bacterial strain has relatively strong capability of rapidly oxidizing thiosulfate ions and also has alkali production characteristic, so that the bacterial strain can be applied to the fields of water pollution treatment and bioleaching.

To provide a desulfurization apparatus capable of treating hydrogen sulfide while suppressing a decrease in methane gas concentration in biogas.SOLUTION: A desulfurization apparatus 16 biologically treats hydrogen sulfide in biogas generated by methane fermentation processing of organic wastewater or organic waste using sulfur-oxidizing bacteria, and includes: a reaction tank 20 to which the biogas is supplied; a non-porous hollow fiber membrane 22 installed in the reaction tank 20; an oxygen-containing gas supply device 24 that supplies an oxygen-containing gas to the hollow fiber membrane 22; an oxygen-containing gas exhaust pipe 26 that exhausts the oxygen-containing gas from the hollow fiber membrane 22 to the outside of the reaction tank 20; and a water spraying device 28 that sprays water onto an outer surface of the hollow fiber membrane 22. The hollow fiber membrane 22 allows oxygen in the oxygen-containing gas to permeate into the reaction tank 20 and supplies the oxygen to a biofilm including the sulfur-oxidizing bacteria formed on the outer surface of the hollow fiber membrane 22.SELECTED DRAWING: Figure 1

The invention discloses a method and a system for producing an organic fertilizer by recycling sulfur based on methane complex iron desulfurization. The method comprises the following steps: S1, carrying out mechanical filter pressing dehydration on a wet sulfur-containing cake generated by methane complex iron desulfurization; s2, placing the obtained purified sulfur cake in a high-temperature aerobic fermentation area; s3, in the high-temperature aerobic fermentation process, adding a composite microbial agent in a specific proportion; s4, in the high-temperature aerobic fermentation process, maintaining and adjusting the pH value of the system by utilizing the organic acid secreted by the compound microbial agent and combining with an externally added acidic regulator; s5, under the synergistic effect of the compound microbial agent and the dynamic regulation and control of the pH value, the elemental sulfur element in the sulfur cake is subjected to an oxidation process and is combined with a nitrogen source in the system, and the ammonium sulfate-containing organic fertilizer is formed through conversion. Based on the synergistic effect of the sulfur oxidizing bacteria-organic sulfur degrading bacteria-thermophilic actinomycetes complex microbial inoculants, the biochemical conversion rate of sulfur to plant absorbable ammonium sulfate is remarkably increased.

The application discloses a monolithic water-resistant and sulfur-resistant CO oxidation catalyst and a preparation method thereof. In one aspect, the application provides a monolithic water-resistant and sulfur-resistant CO oxidation catalyst, wherein the mass ratio of components of the catalyst comprises 2.5-12 parts of CuO x , 0.5-5 parts of SnO2, 0.3-3 parts of AgO x , 40-50 parts of TiO2, 10-20 parts of CeO2-TiO2 composite powder, 2-10 parts of a binder and 12-18 parts of a reinforcing agent; and the catalyst has a honeycomb structure. In another aspect, the application provides a preparation method of the monolithic water-resistant and sulfur-resistant CO oxidation catalyst. The application does not use rare noble metals, has better catalytic effect, relatively lower optimal catalytic temperature and excellent water resistance and sulfur resistance.

The invention belongs to the technical field of nitrogen pollution treatment, and discloses a denitrification filter system for reducing sulfate and hydrogen sulfide under the driving of sulfur oxidation reduction and disproportionated bacteria and an operation method thereof. The problem of accumulation of by-products sulfate and hydrogen sulfide in the sulfur autotrophic denitrification process is effectively solved. The denitrification filter system comprises a water inlet unit, an up-flow continuous flow reactor, a real-time monitoring and regulating unit, an aeration unit, a dosing unit and a water outlet unit, the interior of the up-flow continuous flow reactor is divided into a buffer area and a reaction area from bottom to top, the buffer area is filled with activated carbon, the surface of the activated carbon is loaded with metal oxide, the reaction area is filled with a sulfur-based filter material, and the surface of the sulfur-based filter material is used for enriching sulfur redox and disproportionated flora; the real-time monitoring and regulation unit can dynamically adjust operation parameters of related equipment according to preset control logic and real-time feedback. According to the invention, during deep denitrification, synergistic removal of sulfate and hydrogen sulfide is realized, and the system realizes zero-carbon denitrification and has high desulfurization efficiency.

The application discloses a preparation method of a biological composite filler capable of generating polysulfides to realize deep denitrification, and belongs to the technical field of sewage biological treatment. The filler takes sulfur and limestone as a matrix, adds cysteine and mixes uniformly, simultaneously supplements trace elements, is subjected to bonding and foaming treatment, and is finally shaped to obtain the biological composite filler capable of generating polysulfides to realize deep denitrification. The absorption and utilization of elemental sulfur by sulfur autotrophic bacteria are mediated by extracellular substances. Under the condition of elemental sulfur, substances containing mercapto groups are highly expressed and differentially expressed. They activate elemental sulfur and biologically modify sulfur to generate polysulfides as soluble intermediates for bacteria to utilize. The biological composite filler prepared by the application has the advantages that a small amount of cysteine is added to promote the formation of organic polysulfides, improve the solubility of sulfur in sewage, be beneficial to the absorption of sulfur source by sulfur-oxidizing bacteria and the formation of EPS, shorten the domestication time of microorganisms, and improve the denitrification capacity.

This disclosure relates to methods of forming elemental sulfur and hydrogen gas from hydrogen sulfide. The disclosed methods include contacting a solution including hydrogen sulfide with an electrode for hydrogen evolution and an electrode for sulfur oxidation.

A fertilizer composition comprising a plurality of one or more live sulfur oxidation microorganisms, elemental sulfur, and a solid fertilizer comprising nitrogen, phosphorous, and / or potassium and optionally talc and methods for producing and using the same.

The application of the cross-feeding composite microbial agent for simultaneously removing mineral processing reagents and heavy metal pollution belongs to environmental microbial remediation and wastewater treatment technology, and is a mixture of a sulfur-oxidizing bacteria (Thiobacillus.sp ) bacterial suspension and a sulfate-reducing bacteria Desulfotomaculum_profundi ) bacterial suspension. The cross-feeding composite microbial agent is obtained by inoculating the mixed bacterial liquid into a liquid culture medium and culturing at 30 DEG C under constant temperature and micro-oxygen conditions at 120 rpm until the OD600 value reaches 0.6-1.0. The cross-feeding composite microbial agent realizes simultaneous xanthate high-efficiency degradation and heavy metal (such as Cu²⁺, Pb²⁺ and Zn²⁺) simultaneous fixation treatment in one reactor through the metabolic synergistic effect of the sulfur-oxidizing bacteria Thiobacillus.sp ) and the sulfate-reducing bacteria Desulfotomaculum profundi ).

This invention discloses a reactor, method, and application for the graded enrichment of functional microorganisms, belonging to the field of wastewater biological treatment technology. The method combines a composite packing frame, a two-stage sedimentation tank, and controlled operating conditions to create a multi-gradient distribution environment of sludge settling properties, sludge age, dissolved oxygen, and substrate concentration under continuous flow operation. This forms multiple micro-niche areas, such as suspended zones, packing attachment zones, and sedimentation zones, thereby achieving graded enrichment of different functional microorganisms within a single reactor. Each zone is enriched with functional microbial communities including organic matter hydrolyzing bacteria, ammonia-oxidizing archaea, aerobic denitrifying bacteria, autotrophic denitrifying bacteria, iron-oxidizing-reducing bacteria, and sulfur-oxidizing-reducing bacteria, achieving synergistic coupling of multiple metabolic pathways. This invention achieves multifunctional microbial synergy without the need for multi-stage reactors or complex process segments, improving pollutant removal efficiency and multi-element cycling processes. It has the advantages of stable operation, strong adaptability, and ease of engineering application.

The invention relates to the technical field of foul smell treatment in livestock and poultry breeding, in particular to a compound livestock and poultry manure deodorant as well as a preparation method and application thereof. The deodorant comprises a compound microorganism culture solution, a plant compound extracting solution and a chemical absorbent, the compound microorganism culture solution comprises a culture solution of sulfur oxidizing bacteria, a culture solution of dimethyl sulfide degrading bacteria, a culture solution of trimethylamine degrading bacteria and a culture solution of ammonia oxidizing bacteria; the plant composite extracting solution comprises a plant extracting solution and a surfactant; the raw materials of the plant extracting solution are selected from one or more of honeysuckle, raspberry and clove; the chemical absorbent comprises zinc diricinoleate. The composite livestock and poultry manure deodorant provided by the invention is simple in process and relatively low in cost, has the characteristics of fast deodorization effect and lasting effect, and is suitable for popularization and application in production practice.

The application discloses a KOH-loaded molybdenum disulfide photothermal catalyst and a preparation method and application thereof, relates to the technical field of photothermal catalytic reduction of CO2, and specifically comprises the following steps: obtaining a homogeneous solution by taking ammonium molybdate tetrahydrate and thiourea as raw materials, obtaining a mixed solution after hydrothermal treatment, performing centrifugal treatment, washing treatment and drying treatment, and then performing one-time calcination treatment to obtain molybdenum disulfide powder, and finally loading KOH to obtain the KOH-loaded molybdenum disulfide photothermal catalyst. The preparation method of the catalyst uses MoS2 with edge coordination unsaturation as a supporting carrier, and through loading of KOH, MoS2 is changed from inert basal plane dominance to high-activity defect structure / alkaline basal plane, the alkaline basal plane makes it easier to adsorb CO2 molecules, form intermediate products, and inhibit the phenomenon that the catalyst is deactivated due to sulfur oxidation loss in the catalytic process. Therefore, the photothermal catalyst has great potential in the reduction of CO2.

The invention belongs to the technical field of preparation of sulfur-based filter materials, and particularly discloses a biochar modified slow-release sulfur-based filter material as well as a preparation method and application thereof. The problems that a traditional sulfur-based filter material is loose in structure and release of electron donors is uncontrollable are solved. The biochar-modified slow-release sulfur-based filter material is a composite filter material which takes biochar as a matrix, loads a multifunctional active component and is coated with a polymer controlled-release film on the outer layer, wherein the loading of the multifunctional active component is that sulfur, manganese oxide and calcium oxide are uniformly fixed in pores of the biochar; the preparation method comprises the following steps: biochar raw material pretreatment, functional component loading, primary blank granulation molding, polymer controlled release film coating, surface activation and microbial biofilm formation. The filter material can be used for synergistically removing nitrate nitrogen, phosphate and antibiotics in sewage, the overall structural stability of the filter material can be improved, slow release control of active components is achieved, rapid loss of the components is avoided, the service life of the filter material is prolonged, and long-term stable supply of electron donors is maintained.

A method of generating electricity in a body of water includes providing a colony of sulfur-reducing bacteria, a colony of sulfur-oxidizing bacteria, and a colony of denitrifying bacteria submerged in the body of water. The colony of sulfur-reducing bacteria can be used to convert at least a portion of sulfates present in the body of water to hydrogen sulfide. The colony of sulfur-oxidizing bacteria can be used to convert the hydrogen sulfide to sulfuric acid, which can react with manganese to produce hydrogen gas. The colony of denitrifying bacteria can be used to convert at least a portion of nitrogen oxides in the body of water to nitrogen gas, which can be bubbled through a portion of water from the body of water to remove dissolved oxygen gas. The hydrogen gas and oxygen gas can be combined in a fuel cell generator to generate electricity.

The invention belongs to the field of kitchen waste treatment and malodorous gas treatment, and particularly relates to a synchronous screening method for sulfur-oxidizing bacteria and ammonia-oxidizing bacteria based on a solid carrier microhabitat and application of the synchronous screening method. The synchronous screening method for the sulfur-oxidizing bacteria and the ammonia-oxidizing bacteria comprises the following steps: S1, loading metal ions on the surface of a porous framework material, and coating the porous framework material with a macromolecular hydrophilic material to obtain a porous framework material coated with a gel film. S2, the porous framework material is placed in a culture system, a microbial source is inoculated, H2S and NH3 are introduced, synchronous screening is completed after culture, and the sulfur-oxidizing bacterium-ammonia-oxidizing bacterium coexistence type biological carrier is obtained. S3, transferring the carrier into a simulated kitchen waste foul gas environment, gradually increasing the concentration of H2S and NH3 in the environment, and culturing to obtain the immobilized composite functional microbial agent. Stable coexistence and synergistic metabolism of SOB and AOB are achieved, the problems of substrate competition and metabolic inhibition in a traditional process are solved, the method can be directly applied to a kitchen waste deodorization system, and efficient and long-term removal of sulfide and ammonia gas is achieved.

The application discloses a kind of refractory gold concentrate biological oxidation carbon-in-pulp gold extraction process pollutant processing method, by biological oxidation residue filter pressing washing, reduce the impurity ions such as iron, arsenic, polysulfide into carbon-in-pulp cyanidation process from source, source reduces the generation amount of pollutants such as ferricyanide, arsenic, thiocyanate;Biological oxidation residue is treated with hydrogen peroxide before carbon-in-pulp cyanidation, oxidize low-valence sulfur to sulfate ion, can reduce the generation amount of thiocyanate from source, reduce the amount of gold leaching agent.Carbon-in-pulp cyanidation is carried out with low-cyanide reagent, reduce the cyanide content in carbon-in-pulp tailings;Carbon-in-pulp tailings are filter pressed and washed, filter pressing liquid is returned to be used for oxidation residue slurry, re-enter cyanide leaching, make full use of the residual gold leaching agent in filter pressing liquid, and valuable elements such as gold and silver in filter liquid are recycled.The application uses biological oxidation liquid to treat carbon-in-pulp tailings washing liquid, reduces the cost of cyanide breaking treatment of carbon-in-pulp tailings washing liquid.

This invention belongs to the field of nanomaterial preparation and application technology, and discloses a phosphorus-doped nickel-cobalt sulfide nanotube catalyst, its preparation method, and its application. The method includes: using metallic nickel salt, cobalt salt, and urea as raw materials, and water as a solvent, preparing a nickel-cobalt hydroxide nanorod precursor via hydrothermal reaction; then synthesizing nickel-cobalt sulfide nanotubes via hydrothermal reaction; and finally obtaining a phosphorus-doped nickel-cobalt sulfide nanotube catalyst with a hollow structure via phosphating. Phosphorus doping effectively optimizes the electronic structure of nickel-cobalt sulfides, improving catalytic performance. The prepared catalyst exhibits excellent catalytic activity in hydrogen evolution and sulfur oxidation reactions. In a two-electrode sulfur ion oxidation coupled hydrogen production electrolyzer, a voltage output of 0.373 V is required to produce 10 mA cm⁻¹. ‑2 The invention achieves the goals of energy-saving hydrogen production and high-value-added elemental sulfur by utilizing a specific current density. Furthermore, the preparation method is simple, the conditions are easily controlled, and the raw materials are low-cost and environmentally friendly, making it widely applicable in fields such as water electrolysis for hydrogen production and sulfur oxidation reactions.

This invention discloses a novel ultrafine all-metal separating agent and its preparation method, belonging to the field of separating agent technology. The agent comprises, by mass parts: 38-45 parts of an ultrafine nano-core-shell unwrapping component, 22-28 parts of a dual-center targeted coordination trapping component, 12-16 parts of a carbon-sulfur-arsenic tri-redirection inhibition component, 7-11 parts of a stealthy noble metal in-situ activation component, 4-6 parts of a nanoscale dispersed rheological stabilizing component, and 5-7 parts of a weakly alkaline synergistic buffering and enhancing component. The beneficial effects of this invention are: it integrates fracture penetration unwrapping, directional inhibition of harmful components, in-situ activation of stealthy noble metals, coordination trapping of multi-valence metals, and simultaneous fractional separation of multiple minerals into one process. Multiple effects can be achieved with a single addition, significantly simplifying the mineral processing flow. It simultaneously inhibits carbonaceous gold robbery, sulfur oxidation interference, and arsenic toxicity, passivates active sites on impurity surfaces, and improves the stability and selectivity of the mineral processing system.

A process for producing organic fertilizers involves using a waste ammonia stream to capture sulfur dioxide from the oxidation of sulfur or a gas containing sulfur dioxide to make an ammonium bisulfite / sulfite solution. The sulfite solution is used to scrub hydrogen sulfide out of a biogas or other gas stream. The resulting products contain ammonium thiosulfate and ammonium bisulfite / sulfite.

The present application provides a kind of desulfurization oxidation fan centralized control method, device, equipment and storage medium, belong to desulfurization technical field.The method comprises: the flue gas emission parameter of unit is acquired in real time;Based on the first preset algorithm, the oxidation air volume required by corresponding absorption tower is determined according to the flue gas emission parameter of unit;Based on the predicted slurry quality parameter of absorption tower, the oxidation air volume required by the absorption tower is corrected, and the oxidation air distribution volume required by the absorption tower is obtained.The present application calculates the oxidation air volume required by absorption tower through the flue gas emission parameter of unit, then adjusts and corrects the oxidation air volume required by absorption tower through the predicted slurry quality parameter, obtains the oxidation air distribution volume required by absorption tower, and the oxidation air fan transports oxidation air into the absorption tower according to the oxidation air distribution volume required by absorption tower, realizes the centralized accurate distribution of oxidation air volume according to demand, reduces unnecessary air volume output, and further improves the comprehensive power consumption saving rate.

The invention provides a baffled membrane bioreactor and a method for partition recycling of sulfate wastewater, and relates to the field of wastewater treatment. The reactor is divided into a sulfate reduction compartment, an anaerobic-micro-aerobic transition compartment and a sulfur oxidation compartment which are sequentially connected in series by baffle plates arranged in the vertical direction, wherein a first filler area is arranged in the sulfate reduction compartment; a gas curtain device and a second filler area are sequentially arranged in the anaerobic-micro-aerobic transition compartment from bottom to top; and a third filler area and a sulfur trapping device are sequentially arranged in the sulfur oxidation compartment from bottom to top. The first filler area, the second filler area and the third filler area are respectively used for filling a filler loaded with sulfate reducing bacteria, a H2S adsorption filler and a filler loaded with sulfur oxidizing bacteria. According to the invention, sulfate reducing bacteria and sulfate oxidizing bacteria are effectively separated in space, and the problems of poor system stability, low sulfur conversion rate and low recovery rate caused by cross interference and flora inhibition in a reaction zone are solved.

The present disclosure discloses the identification and introduction of a specific heterologous gene (denoted as smob), which encodes an α-1,2-fucosyltransferase, into an LNT production strain to produce LNFP-I in particular.The smob gene originates from the organism Sulfuriflexus mobilis (https: / / www.dsmz.de / collection / catalogue / details / culture / DSM-102939), which is a sulfur-oxidizing bacterium isolated from a brackish lake sediment.