12 results about "Sulphur oxidation" patented technology

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.

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.

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.

This invention discloses a deep-sea bacterium capable of heterotrophic aerobic growth and autotrophic sulfur oxidation and denitrification, and its applications. The bacterium is *Lihuangiaoceani*, strain number D14, registered at the China General Microbiological Culture Collection Center (CGMCC) No. 1.13774. This *Lihuangiaoceani* possesses facultative sulfur oxidation and denitrification capabilities, enabling heterotrophic growth under aerobic conditions and denitrification using organic matter and / or sodium thiosulfate under anaerobic conditions. It can utilize nitrate as an electron acceptor for sulfur oxidation under anaerobic conditions and oxygen as an electron acceptor for sulfur oxidation under aerobic conditions. It can be used to remove nitrates and thiosulfates from polluted water bodies or sediments, or for wastewater treatment in landscape water, urban rivers, and aquaculture, as well as for the remediation of eutrophic rivers and lakes.

This application relates to the field of wastewater treatment technology, specifically providing a method and system for the synergistic oxidation-reduction coupling treatment of ethylthionitrogen-C-N-S in mineral processing wastewater using a MABR oxygen stratification process. This method and system innovatively develops a time-sequential dissolved oxygen (DO) dynamic control strategy: by periodically / pulsally switching anaerobic-hypoxic-aerobic conditions, the oxidation and ammonification reactions of ethylthionitrogen are directionally enhanced, and the toxic inhibitory effects of intermediate products on functional bacteria are eliminated. Based on this strategy, the system can precisely utilize the spatial distribution of the biofilm oxygen gradient within a single MABR reactor to achieve a cascade reaction of ethylthionitrogen: "sulfur oxidation-ammonification → aerobic nitrification → anoxic denitrification"; or, for high-concentration ethylthionitrogen (>50 mg / L), it can couple a pre-anaerobic reactor to enhance ammonification detoxification and denitrification.

The application provides an extreme acidophilic sulfur-oxidizing bacterium and application thereof. The extreme acidophilic bacterium has strong oxidation on elemental sulfur and tetrathionate ions, is a chemolithoautotrophic acidithiobacillus, and can be used for removing elemental sulfur and tetrathionate ions in the environment, and has wide application prospects. The acidophilic sulfur-oxidizing bacterium has a preservation number of CGMCC No. 14839. The optimal growth temperature of the biological leaching and desulfurization provided by the application is normal temperature, and the optimal growth pH range is wide, so that the strain of the application has practical application significance. In addition, due to the characteristics of chemolithoautotrophy, the strain can improve the climate environment while recovering the environment.

This invention relates to the field of functional materials technology, and discloses an anti-Kasha organic long-afterglow material, its preparation method, and its applications. The anti-Kasha organic long-afterglow material provided by this invention precisely reconstructs the excited-state energy levels of guest molecules through a sulfur oxidation strategy. Using melamine-formaldehyde resin as a rigid matrix, a pure organic long-afterglow material system with both high quantum yield and anti-Kasha type multiple phosphorescence emission is successfully constructed. Compared with the unoxidized system, the singlet-triple bandgap of the oxidized molecules is significantly reduced from 1.264 eV to 0.944 eV, significantly enhancing the intersystem crossing efficiency. At the optimal doping concentration, a phosphorescence quantum yield of up to 63.1% and a total quantum yield of 88.5% are achieved. Furthermore, the oxidized molecules form a dense multi-triple energy level layout, effectively suppressing the internal conversion from the high-energy triplet state to the lowest triplet state in the rigid matrix. For the first time in this type of system, anti-Kasha type multiple room-temperature phosphorescence emission precisely tunable by the excitation wavelength is achieved.

The present application provides a kind of biological method for recovering elemental sulfur from sulfur paste, belongs to environmental microbiological technology and solid waste resource technology field.The biological method includes the following steps: inoculating sulfur-oxidizing bacteria in sulfur paste, then carrying out oxidation reaction under aerobic condition, to obtain mixture A;Mixture A is subjected to solid-liquid separation, to obtain acidic supernatant and sulfur mud containing elemental sulfur;The pH value of acidic supernatant is adjusted to 6.5-8.5, then mixed with sulfur mud, to obtain mixture B;Inoculate sulfur-reducing bacteria in mixture B to obtain reaction system;Reaction system is reacted under anaerobic condition, to generate elemental sulfur precipitate.The present application utilizes the synergistic coupling of sulfur-oxidizing bacteria and sulfur-reducing bacteria, realizes efficient removal of impurities in sulfur paste and directional enrichment and recovery of elemental sulfur, and the purity of recovered elemental sulfur is high.

This invention provides a catalyst for the synergistic treatment of CO and VOCs, its preparation method, and its application. The catalyst comprises a matrix and a first coating and a second coating sequentially supported on the matrix. The first coating comprises a first support, a first active component, a sulfur inhibitor, and a first binder. The first support comprises an MFI hierarchical porous molecular sieve, and the first active component comprises ruthenium and platinum. The second coating comprises a second support, a second active component, and a second binder. The second support comprises titanium dioxide, and the second active component comprises chromium oxide and molybdenum oxide. The catalyst provided by this invention employs a dual-coating design. The first coating solves the problems of catalyst resistance to water gradients, susceptibility to sulfur, and chlorine poisoning. The second coating can oxidize low-valence sulfur compounds such as hydrogen sulfide, carbonyl sulfide, and carbon disulfide in flue gas to high-valence sulfur dioxide and rapidly desorb them, while also protecting the inner coating, significantly extending the catalyst's service life.

This invention provides a sulfur-oxidizing bacteria-mediated, carbon-free autotrophic denitrification method for wastewater treatment. The method utilizes a dual-stress gradient acclimation mechanism—the mass ratio of elemental sulfur in the sulfur source and the pH of the system—to prepare high-performance sulfur-oxidizing bacteria with a polysulfide yield of 35%-42%. A highly active bacterial suspension is obtained through centrifugation, washing, and resuspending in buffer solution. A partitioned fluidized bed reactor, combined with a multi-stage, proportionally controlled composite sulfur source of elemental sulfur and sodium sulfide nonahydrate, achieves highly efficient autotrophic denitrification of nitrogen-containing wastewater under conditions without organic carbon sources. This invention offers high denitrification efficiency and strong operational stability, requires no addition of organic carbon sources, and can simultaneously achieve the synergistic removal of multiple pollutants such as total phosphorus and suspended solids. The effluent quality consistently meets high-standard discharge requirements, making it suitable for deep denitrification treatment of municipal wastewater treatment plant effluent and industrial wastewater with low carbon-to-nitrogen ratios.