34 results about "Biological oxidation" patented technology

The invention discloses a method for efficiently extracting and recovering valuable elements from tailings. The method comprises the steps of gradient crushing-morphology separation, rotational flow reselection-flotation coupling, enhanced alkaline leaching, biological oxidation-acid leaching collaboration, membrane electrolysis enrichment, extraction resin deep recovery and tail water zero discharge treatment. According to the method, metal is pre-enriched through gradient crushing-morphology separation; after rotational flow classification, minerals of different size fractions are recycled through gravity separation and flotation; metal with different chemical forms is dissolved through three-stage synergism of alkaline leaching, biological oxidation and acid leaching; selective deposition of valuable metal in the solution is realized through membrane electrolysis; adsorbing and recovering rare earth by using extraction resin; and tail water closed-loop treatment. According to the method, the aim of multi-element collaborative recovery is achieved, meanwhile, the recovery rate of coarse-grain gold is increased, meanwhile, high-temperature roasting is replaced with biological oxidation, energy consumption is reduced, full recycling of waste water can be achieved, and the method is quite suitable for efficient recovery of valuable elements in metal mine tailings.

The present application belongs to the technical field of wastewater treatment, and discloses a method for treating electroplating wastewater by using bioreduction of biogas slurry and combined iron bio-oxidation, which is a secondary combined use technology for removing various heavy metals in electroplating wastewater by iron bio-oxidation, comprising the following steps: (1) collecting fermentation biogas slurry, and performing ultraviolet irradiation sterilization after aeration; (2) adding potassium dichromate solution and fresh nutrient solution to the sludge system, and culturing anaerobic sludge; (3) adding treated biogas slurry to the anaerobic sludge, and repeatedly domesticating chromium-reducing microorganisms; (4) configuring a mixed solution of comprehensive electroplating wastewater and biogas slurry according to a certain proportion; (5) building a primary treatment biological reactor, and reducing Cr(VI) in wastewater by anaerobic biological reduction under the promotion of pyrite; and (6) building a secondary biological reactor filled with straw biomass charcoal, and generating iron oxides under the action of functional bacteria to continue adsorbing Cd, Cu and Ni ions in wastewater.

The invention discloses a method for green and efficient recovery of gold from refractory gold ore. The green and efficient gold recovery method for the refractory gold ore comprises the following steps that biological oxidation pretreatment is conducted on the refractory gold ore, and biological oxidation ore pulp is obtained; adjusting the pH value of the biological oxidation ore pulp, standing for 1-3 days to carry out bacterial inactivation on the biological oxidation ore pulp, then adding a proper amount of iron-based ligand to adjust the potential of the biological oxidation ore pulp to a proper range, and then adding a proper amount of thiosulfate to carry out in-situ leaching to obtain leached ore pulp; and the leaching ore pulp is filtered and separated, and gold leaching liquid and leaching residues are obtained. According to the method for green and efficient gold recovery from the refractory gold ore, a biological oxidation pretreatment method and a weakly acidic iron-based thiosulfate in-situ leaching process are combined, acid-base conversion of ore pulp is not needed, and green and efficient leaching of gold in the refractory gold ore can be achieved with the low production cost and the short process.

This disclosure relates to a desulfurization method for sulfur-containing wastewater, comprising the following steps: the sulfur-containing wastewater is introduced into an anaerobic biological unit for sulfate reduction treatment to obtain reduced wastewater; the reduced wastewater and oxygen-containing gas are introduced into a hydrogen sulfide stripping unit for stripping treatment to obtain hydrogen sulfide gas products and stripped water; the stripped water is introduced into a water quality stabilization unit for activated carbon adsorption treatment to obtain purified water; the hydrogen sulfide gas products and air are introduced into a biological oxidation unit for hydrogen sulfide oxidation treatment to obtain elemental sulfur and tail gas; the tail gas obtained from the biological oxidation unit is introduced into a tail gas treatment unit, where it undergoes sequential water vapor removal treatment, activated carbon adsorption treatment, and photocatalytic oxidation treatment to obtain purified tail gas. This disclosure enables efficient treatment of high-concentration sulfate wastewater and the recovery of elemental sulfur.

A method for recovering nutrients from wet animal manure, the method comprising adding acid to wet manure (1) to lower the pH value of the wet manure to provide acidified wet manure; adding a polyelectrolyte to the acidified wet manure to obtain granulated wet acidified manure (5b); conveying the granulated wet acidified manure continuously into a liquid-solids separator (6) to separate a liquid manure fraction (16) and a solid manure fraction (7); providing a water purification apparatus (9) comprising an electrolytic cell (21), and a substantially vertical separator tower (20) arranged in a flow connection with the upper part of the electrolytic cell (21), conveying the liquid manure fraction to the electrolytic cell (21), operating the electrolytic cell (21) to produce an accumulating floc; conveying the raising floc into the separator tower (20), wherein the floc (19) is separated by expelling from the top of the separator tower (15), and conveying the solid manure fraction (7) and the floc (19) to an aerated bio-oxidizer device (8) to provide oxidized manure; discharging the oxidized manure (10) from the bio-oxidizer device. A system for recovering nutrients from wet animal manure. A fertilizer product (12) comprising nitrogen, phosphorus and potassium encapsulated in spores of Thermoactinomyces. Use of Thermoactinomyces for producing organic fertilizer. Use of a water purification apparatus for treating wet animal manure. Use of a continuously operating aerated bio-oxidizer device.

The utility model discloses a biological treatment device for acid mine wastewater. The biological treatment device comprises a connecting pipe, a peristaltic pump, an aeration device with an air compressor and an aeration pipe, a biological oxidation component, a biological reduction component, a water outlet tank and a water inlet tank, the biological oxidation part consists of an AMD tank, a peristaltic pump, a biological oxidation reactor, an iron precipitation reactor, a settling tank and a connecting pipe; the biological oxidation reactor is filled with biological filler, is provided with an aeration device, enters from the lower part and exits from the upper part and is beneficial to growth and attachment of microorganisms; the iron precipitation reactor is provided with a stirring device and can adjust the pH value of a solution; the settling tank is used for solid-liquid separation after an iron precipitation reaction and clarification of the solution; the biological reduction part consists of three peristaltic pumps, a biological reduction reactor 7 capable of realizing internal water circulation, heating, temperature measurement, sampling and bacterial liquid addition, two peristaltic pumps, two connecting pipes, three connecting pipes and a water outlet tank for solid-liquid separation and solution clarification; and the wastewater subjected to biological oxidation treatment is received by the water inlet tank and then flows to biological reduction for continuous treatment. The device has the advantages of purifying water and recycling Fe and Cu under the condition of low loss of Cu with low pH value, and being high in cost performance and the like.

The invention relates to a biofilter and a method for the oxidation of methane generated in industrial, agricultural and sanitary landfill processes, among others, where the methane oxidation is biological, requiring methanotrophic microbial consortia, and where copper mining tailings are added to stimulate methane oxidation mediated by said methanotrophic microorganisms.

This invention relates to the fields of environmental engineering and pollution remediation technology, and in particular to a bioelectrochemical system for the remediation and fixation of heavy metal pollution in groundwater and its application. The bioelectrochemical system employs an integrated columnar layered structure simulating vertical seepage of groundwater, comprising, from bottom to top: a groundwater inlet zone, a first transition support layer, an anodic reaction zone, an intermediate isolation layer, and a cathodic reaction zone. Electroactive microorganisms in the anodic zone oxidize organic matter, releasing electrons. These electrons are transferred to the cathode via an external circuit, driving the reduction of heavy metal ions (such as Cr(VI)) to a lower valence state, while pyrite releases Fe. 2+ Biochar promotes precipitation by enhancing fixation through adsorption and electron shuttle. This bioelectrochemical system enables continuous in-situ remediation of groundwater, achieving a Cr(VI) removal rate of up to 92.7%, while simultaneously removing organic matter and nitrogen and phosphorus pollutants. It exhibits stable long-term operation with a low risk of heavy metal re-release, requires no large amounts of chemical reagents or external power supply, and has low operating costs.

The invention relates to an arsenic-gold dissociation optimization treatment device and method for arsenic-gold ore, and belongs to the technical field of gold ore treatment.The multiple sensors are arranged in a reaction chamber of the arsenic-gold dissociation optimization treatment device for the arsenic-gold ore, and multi-source data information is collected through the multiple sensors; a digital twinborn body is formed through the mechanism model layer, the data driving model layer and the high-fidelity simulation layer, so that process states under different control parameter combinations within a preset time are predicted in a virtual space, and the maximum arsenic oxidation rate and flora activity optimal interval are solved based on a genetic algorithm; and calculating an optimal control instruction set, and performing control optimization based on the optimal control instruction set. According to the method, the virtual-real interactive digital twinborn system is constructed, and the genetic algorithm is fused for dynamic optimization, so that accurate prediction and real-time optimization of the biological oxidation process are realized, the arsenic and gold dissociation degree in the arsenic-containing gold ore is improved, and the preparation purity of the gold ore is improved.

The utility model discloses a tail gas purification treatment device of biological oxidation gold extraction relates to tail gas purification treatment device technical field, the utility model discloses a main frame mechanism, the main frame mechanism includes the purification tower, the left side fixedly connected with the air inlet pipeline of purification tower outer surface, the top fixedly connected with the exhaust pipe of purification tower, the bottom fixedly connected with the deflector of purification tower inside, the utility model discloses a purification subassembly is set up, specifically is through setting up multilayer carbon filling layer, and carbon filling layer adopts the mixture of active carbon and modified molecular sieve, can increase the contact area and contact time of tail gas and absorption liquid and adsorbent, improve the removal efficiency to harmful gas, simultaneously, sodium hydroxide and hydrogen peroxide in absorption liquid can carry out chemical reaction and oxidation decomposition to different properties harmful gas, thereby realize the efficient purification to multiple harmful gas, effectively reduced the emission concentration of harmful substance in tail gas, and the environmental protection emission standard has been greatly improved.

This invention relates to a process for treating organic wastewater containing particulate pollutants. The process involves sedimentation and separation of organic wastewater to obtain primary organic wastewater. This primary organic wastewater is then treated in conjunction with ROS aeration and ultrasonic processes. This combination increases the active oxygen content of the primary organic wastewater. The cavitation bubbles generated by the ultrasonic waves break up suspended microparticles in the primary organic wastewater and initiate the initial oxidation of recalcitrant organic matter. Simultaneously, the bubbles generated by aeration enhance the ultrasonic cavitation effect, increasing the concentration of hydroxyl radicals in the primary organic wastewater and significantly improving its oxidizing power. This effectively pre-treats the organic wastewater and improves the water quality stability during the targeted biological purification stage. Consequently, when the resulting secondary organic wastewater undergoes targeted biological purification, the organic matter is rapidly degraded under the action of biological oxidation, reducing the amount of chemicals needed and lowering the operating costs of organic wastewater treatment.

The invention relates to the technical field of paper-making industry wastewater biological oxidation treatment, in particular to paper-making industry wastewater biological oxidation treatment equipment which comprises a treatment pond and an aeration bottom plate, the aeration bottom plate is mounted on the inner bottom wall of the treatment pond, multiple treatment assemblies are arranged on the inner side of the treatment pond, and the upper ends of the treatment assemblies are fixed to the upper end of the treatment pond; the treatment assembly comprises a plurality of connecting ropes and a concave frame, the upper end of the concave frame is connected with the upper end of the treatment pond, every two adjacent connecting ropes are connected through a floating head mechanism, and the floating head mechanisms can float on the surface of sewage. Sewage in the treatment pond shakes under the shaking mechanism, the floating head mechanism shakes along with fluctuation of the water surface, the position of the biological filling base plate on the lower side is changed during shaking, a lifting rope pulls a movable shaft rod to move in a center shaft, and the biological filling base plate is pulled to deform through a penetrating rope, so that gaps are generated among biological matrixes filled on the surface; sewage can be in full contact with the biological matrix on the inner side.

The invention discloses a sewage purification system which comprises a water storage tank, a group of partition plates are connected in the water storage tank, the interior of the water storage tank is divided into a first water collection area, two backflow areas, a purification area and a second water collection area through the partition plates, an adsorption box is arranged in the purification area and divides the purification area into two oxidation areas, a first water pump is arranged in the first water collection area, and a second water pump is arranged in the second water collection area. The first water pump is connected with a water distribution pipe through a pipeline; the water distribution pipe is arranged on the upper side of the adsorption box. The sewage treatment device has the advantages that anion pollutants and cation pollutants in sewage are adsorbed and gathered by the first adsorption area and the second adsorption area, nutrient substances gathered on the surface of the adsorption layer are absorbed by plants, the sewage is subjected to nitrogen and phosphorus removal through the biological anaerobic reaction layer, then aeration is performed through an aeration pipe in the oxidation area, and the sewage treatment effect is improved. Under the action of illumination, sewage is subjected to photocatalytic oxidation reaction on the photocatalytic oxidation layer, organic matters are degraded, and biological oxidation, COD degradation and nitrogen-containing compound oxidation are carried out on the biological contact oxidation layer.

The application provides a method for accelerating green bio-oxidation of arsenic pyrite by using reinforced bentonite medium, and belongs to the technical field of sulfide ore metallurgy. First, acidophilic leaching bacteria with good arsenic tolerance are cultivated, and then a bentonite-microorganism-arsenic pyrite synergistic oxidation system is established to accelerate bio-oxidation and dissolution of arsenic pyrite. Because of the unique physical and chemical properties (such as layered structure, good ion exchange performance, etc.), the bentonite can not only provide an attachment site for the adsorption of bacteria on the surface of arsenic pyrite, but also has a certain catalytic effect on the Al 3+ and other active groups released by the dissolution of the bentonite, which effectively promotes the bio-oxidation and dissolution of arsenic pyrite. The process is simple, efficient and requires low equipment, and can effectively avoid the high cost and environmental pollution problems caused by traditional pyrometallurgical and hydrometallurgical processes.

The application discloses a method for pretreating resourceful electroplating sludge by synergic biological oxidation, and belongs to the field of mineral processing engineering. The method for pretreating resourceful electroplating sludge by synergic biological oxidation is provided, the method is combined with the synergic biological oxidation pretreatment technology, valuable metal elements in the electroplating sludge are effectively recovered, and the process comprises five steps of slurry treatment, synergic treatment, filtration, ion exchange process and desorption. The method has the advantages of remarkable resourceful effect, friendly operation environment, high production efficiency and the like, and realizes the goal of "waste treatment by waste".

The application belongs to the technical field of environment, and discloses a two-stage biological oxidation gas guide well, which comprises a well wall structure, a well pipe structure, a filling structure, a biological cover layer structure and a leachate irrigation structure; the well wall structure comprises a reinforced stone cage net, the reinforced stone cage net is arranged in a well hole of a garbage pile body, a first geotextile screen is fixedly installed on the outer side of the reinforced stone cage net, and a concrete base is arranged at the bottom of the outer wall of the reinforced stone cage net. The two-stage biological oxidation gas guide well is formed by the biological filling layer and the biological cover layer structure, the first-stage biological filling layer maintains moisture by using the percolate in the interior of the pile body, the second-stage biological cover layer maintains moisture by the specially arranged leachate irrigation structure, the purpose of in-situ control of landfill gas is achieved, the problem that landfill gas cannot be treated in a small landfill is solved, the two-stage biological oxidation reduces the emission amount of landfill gas, and the method is suitable for the landfill in operation and has the advantages of low cost and easy operation.

This invention discloses a method and its application for regulating the oxidation and arsenic speciation transformation of arsenopyrite. The method involves sequentially adding arsenopyrite and pyrrhotite to an acidic, iron-free medium with an initial pH of 2.0 to form a protective galvanic cell coupling, followed by inoculation with *Thiobacillus ferrooxidans* and a shaking reaction. By adjusting the ratio of arsenopyrite to pyrrhotite and the addition of *Thiobacillus ferrooxidans*, the method achieves precise regulation of the oxidation of arsenopyrite and the arsenic speciation transformation through phased changes in arsenic release behavior and the As(III) / As(V) ratio. This method possesses dual application value in resource utilization and environmental remediation, and can be applied to the optimization of pretreatment processes for the biological oxidation of gold-bearing arsenic ores or the control of arsenic pollution migration and transformation in acidic mine wastewater, tailings heap leaching, and arsenic-containing sulfide ore coexisting scenarios.

The utility model discloses an efficient circulating biological oxidation pond which comprises a pond body, a supporting column is fixedly connected to the side surface of the pond body, a first sliding groove is formed in the supporting column, a first sliding block is connected to the inner surface of the first sliding groove in a sliding mode, and a threaded rod is connected to the interior of the first sliding block in a threaded mode; a motor is fixedly connected to the upper end of the supporting column, a filter screen frame is slidably connected to the inner surface of the tank body, a filter screen is arranged in the filter screen frame, a first connecting block is fixedly connected to the upper surface of the filter screen frame, and a supporting rod is rotatably connected to the interior of the first connecting block; through cooperation of the motor, the threaded rod, the first sliding block and the connecting frame, the filter screen in the oxidation pond can be lifted, through cooperation of the spring, the pull rod, the sliding block and the connecting rod, the angle of the filter screen can be driven to be inclined, impurities fall into the collecting tank from the filter screen through the gravity of the impurities, workers can conveniently collect the impurities in a unified mode, and the operation efficiency is improved.

The invention relates to the technical field of sewage treatment, in particular to a printing and dyeing sewage treatment oxidation method and device based on aeration, and the method comprises the following steps: mixing printing and dyeing sewage and oxygen-containing gas on a connecting pipeline between an outlet of an anaerobic tank and an inlet of a contact aerobic tank, and carrying out pre-aeration oxygenation to obtain mixed sewage; the mixed sewage sequentially enters a front tank section and a rear tank section of a contact aerobic tank, in the front tank section, oxygen increased in the pre-aeration oxygenation step and an aeration disc arranged in the front tank section are used for jointly maintaining an aerobic environment, and pollutants in the mixed sewage are rapidly degraded through aerobic flora; the degraded sewage flows into a rear tank section and is mixed with activated sludge growing in a suspension manner, aeration is performed, and aerobic biological oxidation degradation is performed on organic matters in the sewage to form a sludge mixed solution; a sludge mixed solution enters the sedimentation tank for mud-water separation, separated water flows out of the water collecting tank, and activated sludge settled at the bottom flows into the rear tank section. The maintenance is convenient, and the operation efficiency is high.

The object of the invention is a wastewater treatment method comprising at least one biological oxidation step in a biological treatment unit (10), characterized in that ozone and an adsorbent compound are introduced, the ozonation and the adsorption are each induced at least upstream of the biological treatment unit (10), or in the biological treatment unit (10), or downstream of the biological treatment unit (10), known downstream of the biological treatment unit (10), at most either the introduction of ozone, or the introduction of adsorbent compounds. The object of the invention is also a device for carrying out the method.

This invention relates to an arsenic-gold dissociation optimization treatment device and method for arsenic-containing gold ore, belonging to the field of gold ore processing technology. By configuring multiple sensors in the reaction chamber of the arsenic-gold dissociation optimization treatment device, multi-source data information is collected through these sensors. A digital twin is then formed through a mechanistic model layer, a data-driven model layer, and a high-fidelity simulation layer. This allows for the prediction of the process state under different combinations of control parameters within a preset time period in a virtual space. Based on a genetic algorithm, the optimal range for the maximum arsenic oxidation rate and microbial activity is solved, calculating the optimal control instruction set, and then optimizing the control based on this optimal control instruction set. This invention, by constructing a virtual-real interactive digital twin system and integrating a genetic algorithm for dynamic optimization, achieves accurate prediction and real-time optimization of the biological oxidation process, improving the degree of arsenic-gold dissociation in arsenic-containing gold ore and increasing the purity of the prepared gold ore.

The invention relates to the technical field of resource utilization, in particular to a biological utilization method based on molten iron desulfurization slag, which comprises the following preparation steps: S1, crushing, magnetically separating and sieving the molten iron desulfurization slag to obtain desulfurization slag powder; s2, mixing the desulfurization slag powder with a sulfuric acid solution, adjusting the pH value to 2-4, reacting to obtain slurry and hydrogen sulfide, and filtering the slurry to obtain filtrate and acid leaching slag containing silicon dioxide; s3, combining hydrogen sulfide with sulfur-oxidizing bacteria loaded in the ceramic filler, and carrying out biological oxidation to obtain sulfuric acid; and S4, adding an alkaline reagent into the filtrate, adjusting the pH value of the filtrate to 4.5-5.5, and filtering to obtain aluminum ion-containing precipitate and filtrate. According to the method, the industrially produced molten iron desulfurization slag is used as a raw material, the sulfuric acid is produced in a biological oxidation manner, besides the main product sulfuric acid, by-products such as acid leaching slag containing silicon dioxide, aluminum hydroxide and recycled iron are separated, the economic value of the whole process is improved, and the problem of land resource occupation is relieved.

The invention belongs to the technical field of medicinal chemistry, and particularly relates to a biological oxidation preparation method of a key intermediate in a chemical synthesis medicine production process. A compound A synthesized by photocatalytic isomerization of pregnenolone is used as a raw material. Under the action of alcohol dehydrogenase, the compound A is oxidized to form a compound B, and then the compound B is shifted in a hydrogen chloride ethanol solvent to form the didrogesterone. Through the preparation technology provided by the invention, the high-purity didrogesterone bulk drug can be obtained with low cost and high efficiency.

The utility model discloses a mining wastewater treatment assembly, and relates to the technical field of wastewater treatment. Comprising a wastewater treatment channel, the outer contour of the wastewater treatment channel is arranged in an S shape in the length direction, and the interior of the wastewater treatment channel is sequentially communicated in the length direction and is divided into a primary precipitation cavity, a biological oxidation cavity, a secondary precipitation cavity, a coagulation cavity, a flocculation precipitation cavity and a filtering cavity; the primary precipitation cavity, the secondary precipitation cavity and the flocculation precipitation cavity are all located on one side of the wastewater treatment channel in the width direction, and the biological oxidation cavity, the coagulation cavity and the filtering cavity are all located on the other side of the wastewater treatment channel in the width direction. The layout arrangement is more compact, and processing areas with different functions can be clearly divided; when wastewater flows from one treatment position to another treatment position, the S-shaped layout can buffer the speed of water flow.

The utility model discloses a biological oxidation device for gold ore treatment, which comprises a shell, the top of the shell is of an open structure, a drain pipe is arranged at the bottom of the shell, a support is arranged on the side wall of the shell, a top plate is arranged on the support, a first motor is arranged on the top plate, and a screw rod is mounted at the driving end of the first motor. The utility model relates to the technical field of gold ore oxidation, the first motor drives the screw rod to rotate, so that the sliding block screwed with the screw rod moves up and down in the sliding chute, and then the pipe frame and the annular aeration pipe are driven to ascend to the top of the device, so that the annular aeration pipe can be conveniently overhauled; workers do not need to enter the device, meanwhile, the position of the aeration pipe can be flexibly adjusted according to different stages of gold ore treatment and the depth of reaction liquid through the lifting design, uniform and sufficient aeration is ensured, and in the initial stage of reaction, the aeration pipe can be adjusted to be close to the bottom to provide sufficient oxygen for microorganisms.

The invention belongs to the technical field of bioengineering and electrochemical chemical engineering, and particularly relates to an electrochemical-biological oxidoreductase cascade catalysis method. The electrochemical-biological combined synthesis technology is adopted, threonine deaminase is accelerated and promoted to catalyze threonine in an electrolysis mode, hydrogen peroxide generated in the oxidation process is promoted to be decomposed to generate oxygen and water, and therefore the effect of catalase is completely replaced. Meanwhile, in the electrolytic tank, part of water molecules in the reaction system can generate oxygen at the anode of the electrolytic tank, and oxygen is provided for DAAO; and when a working electrode is adjusted from a platinum electrode to foam titanium and anode and cathode conversion is carried out, NAD < + > can be effectively reduced to NADH, and a coenzyme regeneration system is provided for conversion of 2-ketobutyric acid to L-2-aminobutyric acid and reduction of PPO to L-PPT. A technical route of adding catalase, alcohol dehydrogenase and isopropanol required by the L-PPT obtained by splitting the D, L-PPT is abandoned.

This invention discloses a device for simultaneous treatment and hydrogen production of organic wastewater based on microbial electrochemistry, relating to the fields of water pollution control and energy recovery technology. Specifically, it is a device for simultaneous treatment and hydrogen production of organic wastewater based on microbial electrochemistry. The device includes, in sequence, a wastewater pretreatment module, an anode biological oxidation module, an ion conduction module, a cathode catalytic reduction module, a gas collection and separation module, and an energy regulation and intelligent feedback control module. After pretreatment, the wastewater enters the anode chamber, where electrogenic bacteria oxidize organic matter, releasing protons and electrons. Electrons are transferred to the cathode via an external circuit, where a catalyst reduces water to produce hydrogen. An ion exchange membrane ensures the directional migration of protons. The system uses an intelligent module to monitor water quality and operating parameters in real time, dynamically adjusting voltage and influent load to achieve efficient and stable hydrogen production and wastewater purification.

The invention discloses a method for smelting and extracting gold from low-gold pyrite, which comprises the following steps of: independently oxidizing and smelting low-grade gold-containing pyrite by utilizing the metalloid property of molten ferrous sulfide, enriching valuable elements such as gold in the ore in a molten ferrous sulfide phase through selective slagging, and realizing the enrichment and recovery of valuable metals such as gold in the ore. The method is not limited by other auxiliary materials such as copper, lead and antimony and can be singly smelted on a large scale, so that the problem that low-grade gold-containing pyrite in remote areas is difficult to dispose is solved; through dual regulation and control of gold-rich ferrous sulfide phase acid leaching and acid leaching residue pulp mixing, the concentration of iron ions in acid leaching residue biological oxidation ore pulp is controlled to be smaller than 45 g / L, the biological oxidation effect of gold-rich acid leaching residues is guaranteed, meanwhile, a byproduct ferrous sulfate is produced, and the comprehensive economic benefits of the process are improved. After the gold-rich ferrous sulfide phase is subjected to'acid leaching + biological oxidation-gold leaching 'treatment, gold leaching residues mainly contain iron oxide, the iron grade is higher than 65%, the gold leaching residues can be fed into an iron and steel plant to be treated, and comprehensive recovery of the iron element in the gold-containing pyrite is achieved.

The utility model relates to the technical field of lake water treatment, in particular to a suspended biological bed for lake water treatment, which comprises an upper floating bed filled with coconut fibers and planted with emergent aquatic plants. The lower-layer floating bed is connected with the upper-layer floating bed through a connecting pipe, coconut fibers are filled in the lower-layer floating bed, and submerged plants are planted in the lower-layer floating bed; the spherical filler string is suspended at the lower part of the upper-layer floating bed and is used for microorganism attachment; and the caisson is connected with the bottom of the upper floating bed through a nylon rope and is filled with pelelith. According to the technical scheme, through the combination of the spherical filler string and the pelelith, a high attachment surface area is provided for microorganisms, the number of the microorganisms is remarkably increased, and the adsorption and biological oxidation effects on organic matters are enhanced; meanwhile, the emergent aquatic plants on the upper layer absorb nitrogen and phosphorus in water, and the root systems of the submerged plants on the lower layer penetrate into the bottom mud to decompose organic matters, so that bidirectional treatment of the water and the bottom mud is realized.

The invention relates to the technical field of sulfur-containing gas treatment, in particular to a sulfur-containing gas biological desulfurization device and method.The device comprises an absorption unit used for absorbing sulfide in sulfur-containing gas to obtain desulfurized gas and sulfur-containing pregnant solution; the biological oxidation reaction unit is used for performing biological oxidation on the sulfur-containing pregnant solution; and the pressure control unit is arranged between communicating pipelines of the absorption unit and the biological oxidation reaction unit and is used for reducing the pressure of the sulfur-containing pregnant solution and stabilizing the pressure. According to the biological desulfurization device, the liquid level of the liquid seal slug at the bottom of the absorption tower can be stably controlled, the risk that high-pressure sulfur-containing gas or sulfur-containing gas with great pressure fluctuation in the absorption tower leaks to the atmosphere end through a connecting pipeline and a bioreactor is avoided, and the desulfurization efficiency is effectively improved.