16 results about "Sulfur cycle" patented technology

The invention discloses a staged regulation and control sulfur cycle enhanced denitrification microbial community construction method, and belongs to the technical field of environmental biologication.The method comprises the three stages that in the first stage, low-carbon-nitrogen-ratio domestication culture is conducted, the carbon-nitrogen ratio is 1.5-2.5: 1, and domestication is conducted for 50-70 days; in the second stage, electron donor-acceptor ratio regulation culture is carried out, the / molar ratio is (4-6): 1, and culture is carried out for 15-25 days; in the third stage, pulse type sulfate is fed for enhanced culture, the single-time feeding concentration is 200-500 mg / L, culture is conducted for 8-15 days, real-time monitoring is conducted through the fluorescence in-situ hybridization technology, construction is completed when the abundance of sulfur autotrophic denitrifying bacteria reaches 28% or above, and when the microflora constructed through the method is used for treating low-carbon-nitrogen-ratio industrial wastewater, the sulfur conversion rate is 1.2-2.0 kg / (m.d), the system stability is good, and the application range is wide. And the impact load resistance is high.

The application relates to a method and device for degrading ethion and recycling heavy metals simultaneously based on an endogenous sulfur cycle, and belongs to the technical field of dressing wastewater treatment. The device is mainly composed of sequentially connected MABR and H2-MBfR. In the method, ethion is oxidized and degraded to produce CS2 and ammonia nitrogen under aerobic conditions in the MABR, and the CS2 is further converted into sulfate; the ammonia nitrogen is nitrified into nitrate nitrogen and nitrite nitrogen. Subsequently, the effluent enters the H2-MBfR, and under anaerobic conditions, the nitrate nitrogen and the nitrite nitrogen are reduced into nitrogen gas by taking hydrogen as an electron donor, and the endogenous sulfate is reduced into sulfur ions; the sulfur ions react with heavy metal ions in situ to generate metal sulfide precipitates. Finally, the precipitates are recovered through solid-liquid separation and are reused for metal flotation. The application realizes directional conversion and collaborative removal of pollutants, does not produce secondary pollution, and realizes recycling of heavy metal resources by using the sulfur element of the pollutants.

The invention discloses a method for rapidly constructing denitrification type anaerobic methane oxidation through hydrogen type methanogens, and relates to the technical field of sewage treatment. According to the method, anaerobic digestion sludge of a sewage treatment plant is taken for inoculation, and a methanogen-mediated denitrification type anaerobic methane oxidation process is constructed. Hydrogen-type methanogens in the anaerobic digestion system excite a reverse methanogenesis function under the condition that organic matters are deficient, and denitrification anaerobic methane oxidation is realized by coupling sulfate and nitrate with nitrogen and sulfur circulating microorganisms. Sulfate is used as a potential electron acceptor in sewage, and dissoluble methane is removed while sulfate is indirectly utilized through recessive biological sulfur cycle catalytic bridging anaerobic methane oxidation and denitrification. In addition, the anaerobic digestion sludge can be continuously inoculated with hydrogen-type methanogens, and compared with traditional denitrification type anaerobic methane oxidation archaea culture, the method is more convenient. Therefore, the denitrifying anaerobic methane oxidation rapidly constructed by the hydrogen-type methanogens is an effective measure for breaking through the deep denitrification of the sewage treatment plant and synchronously controlling and discharging the greenhouse gas.

The invention discloses a green low-carbon treatment device for landfill leachate. The method belongs to the field of landfill leachate treatment. The problems of durability, biological accumulation and toxicity caused by the existing landfill leachate are solved. The device comprises a landfill leachate collecting tank, a three-dimensional electrolysis pretreatment tank, a sulfur circulation multi-stage anaerobic biological treatment tank, a sedimentation tank, an ozone catalysis device and a tail end biological enhancement filter tank which are connected in sequence. According to the invention, the removal of ammonia nitrogen, total phosphorus and refractory organic matters and the reduction of sludge in the biological treatment section are realized, and the effluent is ensured to reach the discharge standard in Pollution Control Standard for Household Refuse Landfill (GB 16889-2008). According to the invention, full quantification and low carbonization of landfill leachate treatment are realized, and the treatment cost is greatly reduced. According to the present invention, the environmental pollution problem can be easily solved, the water resource and the ecological environment can be protected, the technical progress and the industrial upgrading of the water treatment industry can be promoted, and the implementation of the green development and the sustainable development strategy can be promoted.

The utility model provides a wind-light fuel gas heat storage hydrogen production system based on elemental sulfur, which comprises a wind-light power generation unit used for collecting wind energy and solar energy, converting the wind energy and the solar energy into electric energy and transmitting the electric energy; the electric heater is connected with the wind-solar power generation unit so as to convert electric energy into heat energy; the heat storage unit comprises an elemental sulfur high-temperature storage tank and an elemental sulfur low-temperature storage tank; the water electrolysis hydrogen production unit is used for electrolyzing water to produce hydrogen; the heat exchanger comprises a first side which exchanges heat and is connected with the heat storage unit and a second side which is connected with the water electrolysis hydrogen production unit; the first sulfur circulating pump and the second sulfur circulating pump are used for providing circulating power for elemental sulfur; and the elemental sulfur high-temperature storage tank, the first sulfur circulating pump, the first side of the heat exchanger, the elemental sulfur low-temperature storage tank, the second circulating pump and the electric heater are sequentially connected to form an acting loop of elemental sulfur. According to the utility model, the utilization efficiency of energy can be improved.

The present invention is applicable to the desulfurization and decarbonization of a process gas containing sulfur oxides and CO2, and belongs to the field of environmental protection. Ammonia is used as a desulfurizing and decarbonizing agent. The gas enters first a desulfurization apparatus for desulfurization, to produce an ammonium sulfate fertilizer. The desulfurized gas enters a decarbonization apparatus to remove carbon dioxide in the gas, and to produce an ammonium bicarbonate fertilizer. The decarbonized gas, that contains free ammonia, is washed with a desulfurization circulating fluid and then with water. The washing fluids are returned to the desulfurization tower for use as an absorbing agent for desulfurization. This technology integrates decarbonization and desulfurization technologies organically, and uses acidic desulfurization circulating fluid to wash ammonia, thereby achieving a high ammonia washing efficiency and solving the ammonia slip problem suffered by decarbonization processes. The process is simpler, the investment and operation costs are low, ammonium sulfate and ammonium bicarbonate fertilizers are co-produced, and there is no need to inject all of CO2 back to underground for sequestration. Rather, part of CO2 can be used to produce downstream products such as urea, soda ash, etc. The product mix can be flexibly adjusted, and by- product ammonia can be used, thereby realizing treating wastes with wastes and a circular economy. 20 24 21 65 02 30 A ug 2 02 4 2 0 2 4 2 1 6 5 0 2 3 0 2 0 2 4 A u g I N T E G R A T E D A M M O N I A - B A S E D D E S U L F U R I Z A T I O N A N D D E C A R B O N I Z A T I O N

The invention provides a paleo-climate change analysis method and system based on multi-source data fusion, and relates to the technical field of paleo-climate change analys.The paleo-climate change analysis method comprises the steps that volcanic and sulfur cycle related multi-source geochemical indexes are collected and processed in a standardized mode, time alignment is achieved in combination with a geology method, and the consistency and continuity of data are guaranteed; a multivariable causal structure is constructed based on a Bayesian network, volcanic events are set as hidden variables, modeling is carried out on observation indexes in combination with conditional Gaussian distribution, causal relationships and statistical characteristics among multiple indexes are mined, and the problems of data uncertainty and missing are solved; by dynamically calculating posterior probabilities of volcanic events and sulfur cycle anomalies, objective judgment based on probabilities is realized, volcanic-driven sulfur cycle disturbance events are accurately identified, and time matching and correlation analysis are performed in combination with paleoclimate event tags, so that an influence mechanism of volcanic activities on paleoclimate changes is disclosed.

This invention discloses a coupled system and method for flue gas desulfurization and iodine-sulfur cycle hydrogen production based on ammonium sulfite cycling. The system consists of an ammonium sulfite cycling desulfurization unit and a semi-open-ring iodine-sulfur cycle hydrogen production unit. The ammonium sulfite cycle achieves efficient capture and enrichment of SO₂ from flue gas, with zero ammonia consumption and no escape. It constructs a closed-ring iodine and open-ring / semi-open-ring iodine-sulfur hydrogen production system, using flue gas SO₂ as the external sulfur source. The traditional 850℃ high-temperature decomposition step of iodine-sulfur with sulfuric acid is eliminated; hydrogen is produced only by decomposing hydrogen iodide at 300–450℃. Iodine is recycled in a closed-ring manner, with sulfuric acid as a byproduct. This invention simultaneously achieves deep flue gas desulfurization, sulfur resource utilization, and low-cost hydrogen production, significantly reducing energy consumption and operating costs. It possesses excellent environmental and economic benefits and is applicable to sulfur-containing flue gas treatment and hydrogen co-production scenarios in thermal power, steel, coking, and chemical industries.

The application discloses a method for two-stage prediction and optimization of process performance of sulfur circulation coupled denitrification phosphorus removal, comprising: first, preparing data sets for sulfate reduction amount and phosphorus removal rate respectively; in the first stage, taking anaerobic stage process parameters as input, selecting machine learning algorithm, cross-validation method and search method to realize prediction of sulfate reduction amount; in the second stage, taking anoxic stage process parameters and sulfate reduction amount prediction value as input, selecting machine learning algorithm, cross-validation method and search method to realize prediction of phosphorus removal rate; in the model training process, the model is evaluated through the coefficient of determination R 2 and the root mean square error RMSE, and the optimal model is selected according to the evaluation result. According to the optimal model, a scheduling platform is built, and performance prediction and optimization control of the sulfur circulation coupled denitrification phosphorus removal system are realized according to the scheduling platform.

The present application relates to water treatment and aquaculture environmental protection technical field, and disclose a bypass sulfur cycle coupled seawater aquaculture tail water deep denitrification and phosphorus removal method and system, including main road and bypass double process: S1 solid-liquid separation obtains concentrated solid phase and main road clear liquid;S2 in bypass anaerobic reactor, concentrated solid phase organic matter is hydrolyzed and acidified, and then sulfate reducing bacteria is utilized, and reduced sulfate is generated into sulfide and releases phosphorus, and bypass fermentation liquor is obtained;S3 in side flow chemical phosphorus removal unit, reagent is added, and phosphorus precipitate is generated and recovered in a direction, and sulfur-rich supernatant is obtained;S4 in main road anoxic reactor, main road clear liquid, sulfur-rich supernatant and nitrification reflux liquid complete autotrophic denitrification;S5 in main road aerobic reactor, ammonia nitrogen is oxidized into nitrate, and part of effluent is refluxed.The present application realizes spatial decoupling of electron donor and acceptor, and double sludge age operation guarantees efficiency, and external carbon source is not needed, and denitrification and phosphorus removal and phosphorus resource recovery are realized, and the seawater aquaculture tail water quality is adapted.

The utility model relates to a UASB (Upflow Anaerobic Sludge Blanket) reactor based on denitrification of a sulfur circulating biological system. The UASB reactor comprises a reactor column body, a bottom cover detachably connected to the bottom of the reactor column body and a three-phase separator detachably connected to the top of the reactor column body, a reactor column is of a double-layer cavity structure, an inner cavity serves as a reaction area, an outer cavity serves as a constant-temperature water bath area, and the constant-temperature water bath area and the reaction area are independently separated; a water inlet is formed in the bottom cover; the three-phase separator is provided with an exhaust port, a water outlet and a sampling port; a sludge layer, a suspension layer and a settling zone formed by a three-phase separator are sequentially arranged in the reactor from bottom to top, a defoaming device is arranged in the reactor, the defoaming device comprises a scum baffle arranged at a water outlet and is used for intercepting granular sludge with bubbles, pollutants such as COD (chemical oxygen demand), nitrate or nitrate nitrogen and the like in wastewater can be effectively removed, and the sludge treatment efficiency is improved. The centralized treatment requirement of the nitrogen-containing wastewater is met, and the anaerobic biological treatment efficiency of the nitrogen-containing wastewater is effectively improved.

The invention belongs to the field of microorganisms, and particularly relates to a complex microbial inoculant for overcoming continuous cropping obstacles of pinellia ternate and application of the complex microbial inoculant. The active ingredients of the composite bacterial agent are composed of sphingomonas kungheensis JN21 (CGMCC (China General Microbiological Culture Collection Center) No. 36292) and bacillus fruticosa F16 (CGMCC No. 36291), and the active ingredients of the composite bacterial agent are composed of sphingomonas kungheensis JN21 (CGMCC No. 36292) and bacillus fruticosa F16 (CGMCC No. 36291). The two strains can effectively degrade the key continuous cropping autotoxic substance p-hydroxybenzoic acid of pinellia ternate. When the complex microbial inoculant is applied to continuous cropping soil of pinellia ternate, the content of p-hydroxybenzoic acid in the soil is remarkably reduced, the circulation of carbon, nitrogen and sulfur in the soil is promoted, and particularly, the abundance of hydrogen sulfide generation pathway genes is promoted, so that continuous cropping obstacles of pinellia ternate are relieved or prevented. The invention provides an effective microbial solution for solving the continuous cropping obstacle problem of pinellia ternate.

The application relates to the technical field of wastewater treatment, and discloses a wastewater treatment device based on sulfur circulation and a process thereof, which comprises a treatment box, a reduction box and a treatment concentration mechanism; a storage box is fixedly installed at the top of the treatment box; a bottom cover is movably connected to the bottom of the treatment box through a thread structure; when wastewater treatment in the treatment box is completed, the first electric push rod is used to drive the moving plate to move, the thread part on one side of the moving plate is matched with the side wall of the thread rod, the thread rod can drive the movable part to move in the treatment box during rotation, the movable part moves downwards in the treatment box, liquid passes through the screen mesh and flows to the top of the movable part, heavy metal impurities separated in the liquid are isolated at the bottom of the movable part, and finally, the heavy metal impurities are compressed at the bottom of the treatment box, so that the impurities floating in the liquid after treatment are greatly reduced, the separated impurities are easier to be concentrated and treated, and the wastewater treatment efficiency is ensured.

The invention discloses an integrated biological-chemical crystallization treatment method for efficient denitrification and salt resource recovery of landfill leachate, belongs to the field of landfill leachate treatment and resource recovery and utilization, and particularly relates to an integrated biological-chemical crystallization treatment method for efficient denitrification and salt resource recovery of landfill leachate. The invention aims to solve the problems of high operation cost, low biochemical nitrogen and phosphorus removal efficiency and secondary pollution of concentrated solution in the existing landfill leachate treatment. The method comprises the following steps: 1, front-end sulfur circulation anaerobic ammonia oxidation cooperative treatment; 2, middle-stage deep purification treatment; and 3, tail-end three-stage resourceful treatment. According to the comprehensive solution of integrating a sulfur cycle autotrophic denitrification and anaerobic ammonia oxidation synergistic process, a BAF (Biological Aerated Filter) and ozone-biological activated carbon composite deep purification process and a three-stage recycling system of biological struvite recovery, electrochemical crystallization, freezing and nanofiltration, high-value recovery of resources is realized. The method is used for efficient denitrification and salt resource recovery of the landfill leachate.

This invention discloses a short-cut nitrification-iron coupled sulfur cycle biological denitrification method, belonging to the field of nitrogen-containing wastewater treatment technology. This method utilizes domesticated nitrite-reducing bacteria to convert ammonia nitrogen in wastewater into nitrite; then, a composite bacterial agent obtained by inoculating sulfate-reducing bacteria and denitrifying thiobacilli together in a culture medium containing iron or ferrous ions further removes nitrite and nitrate from the wastewater. Through sulfate reduction and sulfur autotrophic denitrification coupled with iron, sulfate in the wastewater is converted into electron donors, forming a carbon-nitrogen-sulfur-iron biological co-reaction system. This overcomes the shortcomings of single-species denitrification systems, enhances denitrification efficiency, and reduces energy consumption and cost.

This invention provides a method and system for paleoclimate change analysis based on multi-source data fusion, belonging to the field of paleoclimate change analysis technology. This invention collects and standardizes multi-source geochemical indicators related to volcanoes and the sulfur cycle, combining geological methods to achieve time alignment and ensure data consistency and continuity. Based on a Bayesian network, a multivariate causal structure is constructed, with volcanic events set as latent variables and conditional Gaussian distributions used to model observed indicators, uncovering causal relationships and statistical characteristics among multiple indicators, thus solving the problems of data uncertainty and missing data. By dynamically calculating the posterior probability of volcanic events and sulfur cycle anomalies, probability-based objective judgment is achieved, accurately identifying volcano-driven sulfur cycle disturbance events. Furthermore, time matching and correlation analysis are performed using paleoclimate event labels, thereby revealing the mechanism by which volcanic activity affects paleoclimate change.