100 results about "Biological oxidation" patented technology

The utility model discloses multistage sewage treatment equipment for chemical engineering, and particularly relates to the field of chemical engineering, the multistage sewage treatment equipment comprises a square filter frame, a secondary treatment cylinder and a biological oxidation pond, the left side surface of the square filter frame is fixedly connected with a square box, and the inner bottom wall of the square box is fixedly connected with a speed reducing motor; the output end of the gear motor is fixedly connected with a screw rod, the outer surface of the screw rod is in threaded connection with a square screw plate, the upper surface of the square screw plate is fixedly connected with two transmission square rods, and the top end of each transmission square rod penetrates through the square box and extends to the position above the square box; the top end of each transmission square rod is fixedly connected with a connecting plate. According to the utility model, the coarse filter screen can be taken out from the square filter frame, so that the coarse filter screen can be conveniently detached, a worker can conveniently clean sundries on the coarse filter screen, the coarse filter screen is prevented from being blocked to influence subsequent sewage treatment, the coarse filter screen can be conveniently cleaned, and the cleaning operation is simpler.

The invention discloses a method for synergistically enhancing biological oxidation of arsenopyrite by utilizing symbiotic minerals, which particularly comprises the following steps: adding a certain amount of pyrite into an arsenopyrite biological oxidation system, and improving the quantity and activity of acidophilic thiobacillus ferrooxidans by utilizing chemical change of a solution generated by oxidation of the pyrite. The mineral leaching capability of the functional microorganisms is optimized; meanwhile, under the dual action of pyrite and microorganisms, the content of Fe < 3 + > in the solution is remarkably increased, and the Fe < 3 + > serves as a main oxidizing agent for oxidizing arsenopyrite; due to the difference between the surface potentials of the pyrite and the arsenopyrite, a galvanic couple effect is formed between minerals, the electron transfer efficiency between the arsenopyrite and the oxidizing agent is accelerated, and finally the purpose of improving the leaching rate of the arsenopyrite in a biological system is achieved; according to the method, the leaching rate of arsenic in an arsenopyrite biological oxidation system is increased by nearly 8 times at most, the reinforcing effect on arsenopyrite oxidation is remarkable, and meanwhile the method is simple in process, mild in condition, easy and convenient to operate and low in cost.

The invention discloses a method for accelerating straw composting by utilizing magnetite and compound microorganisms to drive biological advanced oxidation, and belongs to the technical field of efficient composting of agricultural organic solid wastes. The method comprises the following steps: (1) uniformly mixing straws and excrement as a compost body, adjusting the C / N ratio and the water content, adding magnetite, a bacillus subtilis liquid and a crushed white rot fungus liquid, and putting the mixture into a composting device; (2) intermittent aeration is carried out, the temperature is 28-32 DEG C, and the composting period is 40-50 days. According to the composting method, through intermittent aeration, controllable aerobic conditions and anoxic conditions are formed in a compost body, under the anoxic conditions, ferric iron is subjected to dissimilatory iron reduction to generate ferrous iron, and under the aerobic conditions, compound microorganisms reduce oxygen through extracellular electron transfer to form hydrogen peroxide, so that the composting effect is improved. Divalent iron and hydrogen peroxide are subjected to a Fenton-like reaction to generate hydroxyl free radicals with high oxidizing property, so that decomposition of straw lignocellulose is accelerated, and the composting efficiency of compost is improved.

The utility model belongs to the technical field of biological denitrification of industrial aquaculture water, and particularly relates to a denitrification device suitable for an industrial aquaculture system. Comprising an aerobic nitrification zone, a carbon source zone, an aerobic denitrification zone and a suspended particle removal zone which are communicated in sequence, a filter material is arranged in the aerobic nitrification zone, and the aerobic nitrification zone is used for carrying out biological oxidation on aquaculture water to generate nitrate; the upper part of the carbon source region is filled with carbon sources; the aerobic denitrification area is used for reducing nitrate in the water body into nitrogen; the suspended particle removal area is used for removing suspended particles in the water body. A water inlet pipe is arranged at the bottom of one side wall of the aerobic nitrification area, an aerobic nitrification area overflow port is formed in the upper part of the other side wall of the aerobic nitrification area, and the internal space of the aerobic nitrification area is distributed in a shape; a water outlet pipe is arranged at the bottom of the side wall of the suspended particle removal area. According to the device, aerobic nitrification, aerobic denitrification and suspended particulate matter removal are organically integrated, intensification and modularization are realized, the device is simple in structure and convenient to operate, and the culture denitrification effect is effectively improved.

The invention relates to the technical field of water treatment and resource recovery, in particular to a high-iron-content acid mine water treatment and recycling method based on immobilized biological oxidation and fractional precipitation, which comprises the following steps: S1, a bacterial immobilization stage; s2, an immobilized biological oxidation stage; and S3, a fractional precipitation stage. The method is high and stable in treatment efficiency, bacteria are firmly fixed on a carrier by adopting a bacteria immobilization technology, the loss of the bacteria is avoided, and the biomass and the metabolic activity are improved; waste recycling is achieved, the sludge yield is low, secondary pollution is avoided, the technology is coupled and innovated, and the reactor is reasonable and efficient in design.

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 invention belongs to the field of wastewater treatment, and particularly relates to an industrial concentration area wastewater treatment station and method.The industrial concentration area wastewater treatment station comprises a grit chamber, an adjusting tank, a biological oxidation tank, a dosing sedimentation tank and a water collecting tank which are sequentially connected, and a grating is installed at a water inlet of the grit chamber; the electrolyzed water treatment device is used for reducing heavy metal ions by carrying out oxidation-reduction reaction by utilizing direct current and is connected between the regulating tank and the biological oxidation tank; the electrolytic water treatment device comprises a tank body, a plurality of cathode plates and a plurality of anode plates, during use, industrial wastewater is injected into the tank body from the water inlet, the wastewater subjected to electrolytic treatment is discharged from the water outlet pipe and enters the biological oxidation pond to be treated, and in the treatment process, the cathode plates and the anode plates are powered on, so that the wastewater is treated; direct current is used for carrying out redox reaction to reduce the heavy metal ions, and the heavy metal ions are deposited at the cathode, so that the heavy metal ions in the wastewater are removed.

The invention provides a preparation method of a debris flow protection engineering self-repairing concrete part by using microorganisms and magnesium oxide, which comprises the following steps: S1, dipping a porous aggregate base material with the particle size distribution of 1-5mm in a urease-producing microbial agent, and enabling urease-producing microorganisms in the urease-producing microbial agent to fully enter pores of the porous aggregate base material; s2, urea and magnesium oxide are added into the urease-producing microbial agent impregnated with the porous aggregate base material to obtain a mixed solution, the mixed solution is maintained for 2-5 days, the self-repairing aggregate with the particle size distribution ranging from 2 mm to 10 mm is obtained, urea, urease-producing microorganisms, magnesium oxide and water react with one another in the maintenance period, a hardened shell wrapping the outer surface of the porous aggregate base material is generated, and the self-repairing aggregate with the particle size distribution ranging from 2 mm to 10 mm is obtained. Urea and urease-producing microorganisms are retained in pores of the porous aggregate base material, and the hardened shell comprises brucite, basic magnesium carbonate and magnesium oxide which is not completely reacted; and S3, mixing the self-repairing aggregate with the debris flow protection material, and curing to obtain the debris flow protection engineering self-repairing concrete piece utilizing the microorganisms and the magnesium oxide.

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 relates to the technical field of environmental monitoring and analysis, and particularly discloses a method for distinguishing biological and chemical oxygen consumption pathways and application. According to the method, isotope information is deeply excavated from an oxygen consumption end by utilizing specific differences of oxygen isotopes in different oxygen consumption processes. According to a biological respiratory metabolism oxygen consumption process and an oxygen isotope fractionation rule related to reducing metal ions or compounds, residual oxygen concentration and isotope composition are changed according to a specific mode. A chemical probe is introduced as an auxiliary judgment, and a support is provided for further accurate judgment of oxygen consumption types by tracking dynamic changes due to the fact that degradation rates or products of probe molecules in biological and chemical oxygen consumption processes are different. Meanwhile, carbon isotope change monitoring is introduced, and deep key information behind the oxygen consumption process can be clearly known according to the isotope difference between the chemical oxidation organic carbon and the biological oxidation organic carbon. And the identification and distinguishing accuracy of the oxygen consumption source is improved according to the three dimensional indexes.

The utility model relates to a high COD (Chemical Oxygen Demand) organic wastewater treatment system which comprises a biological oxidation tank, the biological oxidation tank comprises an inner cylinder body and a jacket cylinder body arranged outside the inner cylinder body, a water inlet is formed in the lower part of the jacket cylinder body, and a water outlet is formed in the upper part of the jacket cylinder body; a first discharge port is formed in the bottom of the inner cylinder body, an air inlet, a sampling port and a plurality of detection ports are formed in the side wall of the inner cylinder body, an upper flange cover is detachably and fixedly arranged at the top of the inner cylinder body, and an exhaust port, an inoculation port and a plurality of material supplementing ports are formed in the upper flange cover; the air inlet is connected with an aeration disc positioned at the bottom of the barrel body of the inner barrel through a breather pipe; and a stirring mechanism is arranged in the middle of the inner cylinder body. The high-COD organic wastewater treatment system is high in COD removal treatment efficiency, high in impact resistance, good in biodegradability, low in cost and small in investment, and has obvious environmental benefits and wide application prospects.

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 present disclosure discloses a method for strengthening a biological manganese oxidation using a magnetic field and use thereof. The method includes steps of inoculating a manganese-oxidizing microorganism into a culture medium containing Mn2+, performing magnetization treatment in a culture process, and then collecting a biogenic manganese oxide. The method includes steps of performing a primary magnetic field treatment at a magnetic field intensity of 0.2-50 mT for 1-5 h when culturing is performed for 6-12 h, continuing culturing after the primary magnetization treatment, and performing magnetization treatment once every other 24 h for culture time of 72 h. A magnetic field is applied to accelerate an oxidation rate of a manganese-oxidizing microorganism to Mn2+ and a biological manganese oxidation rate is respectively improved by 36.4% and 23.8% under an action of an alternating magnetic field or a constant magnetic field within 72 h.

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.

This invention discloses a method and application for treating polyoxymethylene (POM) wastewater, belonging to the field of wastewater treatment technology. The method first involves adding hexadecyltrimethylammonium bromide and ethanol to the wastewater in an anaerobic environment to form micelles that encapsulate POM, and then utilizing anaerobic bacteria to degrade formaldehyde and macromolecular organic matter. Next, the anaerobic effluent is introduced into a facultative anaerobic environment, where a continuous linear decrease in pH triggers the staged disintegration of the micelles, releasing POM. Simultaneously, acclimation bacteria are added in stages according to pH changes to dynamically degrade the released formaldehyde. Finally, complete mineralization is achieved through two-stage biological oxidation in an aerobic environment. This invention blocks the random depolymerization of POM through spatial encapsulation and controls the release rate through sequential acidification, achieving a dynamic balance between formaldehyde formation and biodegradation. This effectively avoids the inhibition of microorganisms by toxicity peaks, significantly improving the removal efficiency of formaldehyde and organic pollutants and the stability of system operation.

The invention discloses a wastewater treatment device based on electrocatalysis and microorganism synergy, which comprises a reaction tank body, a sealing cover arranged at the top of the reaction tank body, a water inlet arranged at one side of the bottom of the reaction tank body, a water outlet arranged at the other side of the top of the reaction tank body, an overflow weir arranged at the water outlet, and cathodes and hollow anodes alternately arranged in the reaction tank body, the cathode and the hollow anode are respectively connected with a direct-current power supply through wires to form an electrolytic electric field; a plurality of aeration micropores are formed in the hollow anode, and the hollow anode is communicated with an air source through a pipeline; the device realizes the synergistic effect of electrocatalytic oxidation and biological oxidation through multi-field coupling of an electric field and a microbubble field: under the action of the electric field, an anode generates active oxide species (OH, H2O2 and the like) in situ, and refractory organic matters are degraded into easily biodegradable intermediate products; meanwhile, the activity of aerobic microorganisms is guaranteed through oxygenation, the microorganisms conduct subsequent metabolism degradation on organic matter, and efficient removal of indexes such as COD, ammonia nitrogen and chromaticity is achieved.

The invention provides a lead zinc ore mining-based sludge and sewage step-by-step treatment system, which comprises a pretreatment system, a chemical precipitation system, a biological treatment system and a post-treatment system, the pretreatment system comprises a grid and a grit chamber, the chemical precipitation system comprises an adjusting tank, a reaction tank and a segmented precipitation tank, the biological treatment system comprises a biological aeration filter tank and a biological oxidation tank. According to the sludge and sewage step-by-step treatment system based on lead-zinc ore mining provided by the invention, multi-layer sequential treatment operation is carried out through the sectional sedimentation tank in the lead-zinc ore sludge and sewage treatment process, and sludge containing heavy metals and impurities in sewage can be treated for multiple times; meanwhile, in the post-treatment system, sludge and sewage which are finally generated can be subjected to later classification treatment and utilization by utilizing sand filtering device sludge treatment equipment and activated carbon filtering and sludge treatment equipment, so that the utilization rate of residues can be increased.

The present invention relates to means and methods for the biological oxidation of formic acid in industrial wastewater, particularly with high salt concentrations. Yeast cells suitable for this purpose are described as well as useful enzymes, particularly formate dehydrogenases and oxidases.

The invention discloses a method for preparing high-purity lead sulfate through lead-zinc ore conversion driven by biological oxidation of sulfur, and belongs to the technical field of biological metallurgy. According to the method, sulfate ions are generated in situ and mineral dissolution and lead and zinc metal ion release are promoted through the biological oxidation effect of acidophilic sulfur oxidizing bacteria on sulfur components in lead-zinc ore; and the bioleaching process of minerals is enhanced by optimizing reaction conditions (culture medium composition, pH, temperature, ore pulp concentration and the like). After leaching, Zn < 2 + > exists in a leaching solution, Pb < 2 + > reacts with SO4 < 2-> generated by sulfur biological oxidation in time to form a high-purity lead sulfate precipitate, finally, separation is performed, the precipitate is simply washed and then dried, a lead sulfate product with the purity larger than or equal to 99% is obtained, and the conversion rate gt of Pb to PbSO4 in the lead zinc ore is larger than or equal to 99%; the yield is 99.6%. Compared with a traditional acid leaching method, the method has the advantages of being low in energy consumption, small in pollution, high in metal recovery rate and excellent in product purity, and is suitable for efficient and clean utilization of lead zinc ore resources.

The invention discloses a biological oxidation process intelligent optimization method based on a control model, and relates to the technical field of biological oxidation process control, and the method comprises the steps: constructing a biological oxidation coupling deviation operator and a liquid level overflow risk operator based on a biological oxidation process smooth monitoring sequence set, and generating a control response factor group, forming a biological oxidation process control model; performing stability statistical processing on the biological oxidation coupling deviation operator and the liquid level overflow risk operator to form a biological oxidation coupling deviation operation threshold value group and a liquid level operation state threshold value group, dividing operation states, and generating a biological oxidation process intelligent optimization control instruction in combination with a biological oxidation process control model; the biological oxidation process intelligent optimization control instruction is issued to an execution mechanism to complete adjustment, biological oxidation process monitoring data are collected again, a new biological oxidation coupling deviation operator and a new liquid level overflow risk operator are generated, and the biological oxidation process control model is corrected.

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.

The invention discloses a method for leaching nickel-cobalt-copper sulfide ore under a near-neutral pH condition. The method comprises the following steps: domesticating and culturing microorganisms under the near-neutral pH condition; construction of a near-neutral biological leaching system (an organism-ligand leaching system); leaching the nickel-cobalt-copper sulfide ore; and finally, leaching liquid containing nickel, cobalt, copper and other valuable metal ions is obtained. According to the method, the pH value of a near-neutral microorganism-ligand leaching system is 5-9, and the pollution risk and the repair problem of a traditional biological leaching acid site are avoided. Meanwhile, biological oxidation avoids the use of a chemical oxidizing agent for chemical oxidation leaching. In addition, the near-neutral environment of the method effectively overcomes the problems that the acid consumption amount is large, the permeability of a leaching pile body is deteriorated and the like when a conventional acid system is used for leaching nickel-cobalt-copper sulfide ore with the high content of basic gangue such as calcium and magnesium, and finally selective efficient extraction of valuable elements is achieved. According to the method for leaching the nickel-cobalt-copper sulfide ore under the nearly neutral pH condition, used equipment is simple, operation is easy, environment friendliness is achieved, and industrial application and popularization can be achieved easily.

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 discloses a polyformaldehyde wastewater treatment method and application, and belongs to the technical field of wastewater treatment. The method comprises the following steps: firstly, in an anaerobic environment, adding hexadecyl trimethyl ammonium bromide and ethanol into wastewater to form micelles to wrap trioxymethylene, and degrading formaldehyde and macromolecular organic matters by using anaerobic flora; secondly, introducing anaerobic effluent into a facultative environment, triggering micelles to disintegrate and release trioxymethylene in stages by continuously and linearly reducing pH, and meanwhile, adding domestication flora in stages according to pH change so as to dynamically degrade released formaldehyde; and finally, thorough mineralization is realized through two-stage biological oxidation in an aerobic environment. According to the invention, random depolymerization of trioxymethylene is blocked by space wrapping, and the release rate is controlled by time sequence acidification, so that formaldehyde generation and biodegradation are dynamically balanced, inhibition of toxicity peak on microorganisms is effectively avoided, and the removal efficiency of formaldehyde and organic pollutants and the operation stability of the system are remarkably improved.

The utility model discloses a scintillation liquid supply device of a biological oxidation combustion instrument in the field of radioactive test analysis, which comprises a mixed scintillation liquid bottle made of glass, a bottle cap made of rubber is arranged at a bottle opening of the mixed scintillation liquid bottle, and a liquid outlet of the mixed scintillation liquid bottle is communicated with the mixed scintillation liquid bottle. A main liquid supply pipe, a gas pipe and a liquid adding pipe which are made of quartz materials are respectively inserted into the mixed scintillation liquid bottle, the main liquid supply pipe, the gas pipe and the liquid adding pipe penetrate through the bottle cap, the upper ends of the main liquid supply pipe, the gas pipe and the liquid adding pipe extend out of the bottle cap, a one-way valve is arranged at the extending end of the gas pipe, and a one-way check valve is arranged on the liquid adding pipe extending out of the bottle cap. According to the utility model, the scintillation liquid can be prevented from being polluted by a plastic material, and the liquid supply pipe made of the quartz material is corrosion-resistant, non-discoloring, stable and reliable; radioactive test pungent odor generated during preparation and transfer of the mixed scintillation liquid is avoided, and the health of experiment operators is protected.

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 present invention belongs to the field of wastewater treatment, and specifically relates to an industrial centralized area wastewater treatment station and method, which includes a grit chamber, an adjustment tank, a biological oxidation tank, a chemical addition sedimentation tank, and a collecting tank connected in sequence. A grille is installed at the water inlet of the grit chamber; it also includes an electrolytic water treatment device that uses direct current to carry out oxidation-reduction reactions to reduce heavy metal ions. The electrolytic water treatment device is connected between the adjustment tank and the biological oxidation tank; the electrolytic water treatment device includes a tank body, a plurality of cathode plates, and a plurality of anode plates. During use, industrial wastewater is injected into the interior of the tank body from the water inlet, and the wastewater after electrolytic treatment is discharged from the outlet pipe and enters the biological oxidation tank for treatment. During the treatment process, relying on the cathode plates and anode plates being energized, oxidation-reduction reactions are carried out using direct current to reduce heavy metal ions, and the heavy metal ions are deposited on the cathode, thereby removing heavy metal ions from the wastewater.

The utility model relates to the technical field of wastewater treatment, in particular to flax wastewater biological oxidation treatment equipment which comprises a filter vat, a water pump and a biological contact oxidation pond are arranged on one side of the filter vat, a biological membrane filler storage box is arranged in the biological contact oxidation pond, and a branch pipe is fixed on a water inlet pipe of the water pump. A guide pipe is fixed to the side, away from the biological contact oxidation pond, of the filter barrel, a barrel cover is arranged at the top end of the filter barrel, a motor is fixed to the top end of the barrel cover, an output shaft of the motor is connected with a vertical rod through a coupler, a base is fixed to the bottom end of the vertical rod, a plurality of through grooves are formed in the base, and sleeves and check rings are arranged in the through grooves. Flanges are integrally formed in the sleeves, the top ends of the flanges are connected with conical filter screens through bolts, and an access hole is formed in the barrel cover; the output shaft of the motor drives the vertical rod to rotate, the filter screen needing to be replaced rotates to the position below the cover plate, the filter screen not needing to be replaced rotates to the position below the guide pipe, and filtering work is not affected when the filter screens are cleaned or replaced.