57results about How to "Increase dissolved oxygen rate" patented technology

The invention discloses a campus rainwater ecological cleaning integrated-processing method and an ecological cleaning integration system. The method comprises the following steps: 1) establishing an integration processing system for processing campus rainwater in a campus in advance; 2) selecting a proper processing method according to ecological purification conditions of different water bodies in the campus; and 3) finally collecting rainwater processed in the step 2) to a landscape water body in the campus, or discharging into a river in the campus, or collecting into the underground water layer of the campus. The system comprises an undercurrent type artificial wetland system for processing campus initial-stage rainfall runoff, a shoreland-area closure system for processing campus storm runoff, an ecological floating bed-aeration plug-flow system for processing campus natural revetment river water body, an artificial waterweed-micropore aeration system for processing campus hard revetment river water body, and a biomanipulation-fountain aeration system for processing campus enclosed pond water body. The beneficial effects comprise that the purification effect is good, the cost is low, the resource utilization rate is high and the purification effect is lasting.

The invention discloses a three-dimensional waterbody circular oxygenation purification plant and a method in waterbody control and restoration field, realizing circular oxygenation purification function for water body in mass flow in big water areas. The circular oxygenation purification plant comprises a power supply, an aeration plant, a water-output vectoring nozzle, a work pipe section, a micro-bubble generator, a water-input vectoring nozzle, a gas supply pipe, a floating body and a floating body support. The method comprises the following steps: pressure gas generated by the aeration plant in water area is fed into the micro-bubble generator fixed in the work pipe section to generate micro-bubble flow flowing upwards; in the water-output vectoring nozzle, micro-bubble flow pushes waterbody to flow upwards to the top, and simultaneously the waterbody at the bottom of the water-input vectoring nozzle enters the vectoring nozzle and then quickly flows to the top of the vectoring nozzle for spraying and then sprays all around, therefore, the purpose of circular oxygenation purification by waterbody exchange is realized by the way that waterbody flows back to the bottom of the vectoring nozzle downwards from a far end for circular flow after surface reoxygenation.

The invention relates to a full-automatic disinfection aerator. The aerator comprises a roof cap, a water cavity arranged under the roof cup, a submersible motor which is connected with the water cavity through a flange, and a floating ball which is connected to the other end of the submersible motor, wherein an ozone generator is arranged in the roof cap, and connected with an aerator automatic switching control system which is used for controlling the switch of the ozone generator; an air outlet of the ozone generator is connected with an airway tube; at least one water outlet is annularly formed on the outer wall of the water cavity; a jet pipe is arranged at the water outlet, an inclined air inlet pipe communicated with the inner cavity of the jet pipe is arranged on the lateral wall of the jet pipe; and the air inlet pipe is communicated with the airway pipe. In the full-automatic disinfection aerator, a microcomputer monitor and control system is adopted to perform numerical operation to collected data; the tail end of the ozone generator is connected to the air inlet of jet flow, and mixed gas of ozone and air is introduced into a jet device by utilizing the principle of negative pressure jet flow, so that the effect of disinfecting a water body is achieved, and the oxygen dissolving rate of the water body is increased.

The invention provides a gas dispersing machine for an aerating system, which comprises a base and a gas dispersing film, wherein the base comprises a bearing disk and a gas inlet pipe, the center of the bearing disk forms a gas spraying hole and is provided with a bearing surface, and the gas inlet pipe is connected with the side opposite to the bearing surface of the bearing disk and provided with a channel communicated with the gas spraying hole; the gas dispersing film is arranged on the bearing surface of the bearing disk, the edge of the gas dispersing film is in close fit with the bearing surface of the bearing disk, the gas dispersing film comprises a gas inlet layer which is made of fiber and close to the bearing disk and a support layer which is overlapped on the gas inlet layer, and the gas inlet layer is non-woven cloth made of fiber with the diameter of between 50 nanometers and 5 micrometers and the basic weight of between 20 and 150 grams / square meter; and the gas dispersing machine has the effects of thinning gas bubbles and greatly improving the oxygen dissolving speed.

The invention provides an axial-flow inverted umbrella aerator which comprises a driving device, an output shaft and an aeration impeller. The driving device is connected with the aeration impeller through the output shaft and drives the aeration impeller to rotate, the aeration impeller comprises an impeller shaft, a key, an axial-flow blade hub, axial-flow blades, limiting nuts and aeration blades. Water with less oxygen content at the bottom of an aeration tank can be lifted and circulated upwards by the aid of the axial-flow blades, a gas phase of oxygen is transferred into a liquid phase, so that the oxygen and the water are sufficiently and uniformly mixed, the heights and the angles of the axial-flow blades can be adjusted by adjusting positioning screws and adjusting screws according to the height of a liquid level and medium characteristics, and the functions of the aerator are sufficiently played.

The invention discloses a method for preparing polymalic acid by adding oxygen carriers. Budding short-stalk mucedine strains serve as original strains, and spore suspension liquid is prepared; the spore suspension liquid is transferred to a seed culture medium to be cultured, the culture temperature ranges from 20 DEG C to 30 DEG C, the rotating speed of a shaking table ranges from 180 r / min to 230 r / min, and the culture time ranges from 35 h to 45 h; under the protection of flame, the obtained seed liquid is transferred to a fermentation medium at the amount of 8-12 %v / v to be cultured in a fermentation mode; a 10 mol / L H2O2 solution is added in a flowing mode when fermentation is conducted to the logarithmic phase of 35-50 h, wherein the volume of the H2O2 solution is 0.5-2 % of the volume of fermentation liquor, the fermentation period ranges from 140 h to 150 h, the H2O2 solution added in the logarithmic phase in the flowing mode promotes the oxygen dissolving rate, and therefore the synthetic efficiency of the polymalic acid is improved, the conversion rate of substrates is increased, the production cost is reduced, and efficiency is improved.

This invention relates to nanometer oil-saving burning device of high efficiency of environment protection. The character is in that the materials used are silica gel, soot carbon and nanometer far IR material which has nanometer titanium oxide, silicon oxide, ferric oxide, zinc oxide, aluminum oxide, magnesia, composite ceramics powder. The oil-saving device of this invention utilizes the resonance theory of the latest nanometer technology so as to thin the oil and gas molecule and to reduce the resistance when conducting electricity. This can efficiently improve the burning efficiency of oil, electricity and gas so as to recover the horsepower, lower the oil consumption, reduce the waste gas and lower the noise.

An improved chemical wastewater processing material is made of, by weight, 9 parts to 17 parts of ferric sulfate, 6 parts to 13 parts of stearamide, 4 parts to 10 parts of stearate, 3 parts to 8 parts of photosynthetic bacteria, 7 parts to 9 parts of streptococcus faecium, 2.3 parts to 8 parts of tourmaline, 4 parts to 10 parts of zeolite, 6 parts to 14 parts of sodium dihydrogen phosphate, 1 part to 5 parts of gel, 6 parts to 13 parts of calendula, 4.5 parts to 7 parts of neodymium oxide, 1 part to 4 parts of tea polyphenol, 9 parts to 16 parts of nanometer titania, 7 parts to 12 parts of calcium oxide, 8 parts to 17 parts of gallic acid, 8 parts to 14 parts of lime and 6 parts to 13 parts of anionic polyacrylamide. The improved chemical wastewater processing material has the advantages that by means of the chemical wastewater processing material, heavy metal ions in solidification water can be neutralized, toxic substances can be reduced, and meanwhile the oxygen dissolving rate in water can be increased and the eutrophication phenomenon can be reduced.

The invention relates to a culture method for directly obtaining a plant by a pepper anther and a culture medium, and belongs to the field of plant cell engineering. The culture method comprises the steps: (1), selecting a flower bud with microspores in a mid-late uninucleate stage; (2), soaking the flower bud by alcohol with the concentration being 70 percent for 0.5-1min and mercuric chloride with the concentration being1.2 percent for 8-15min, washing for 3-5 times by using sterile water, sucking water to be dry by using sterile filter paper to obtain a sterile anther in the mid-late uninucleate stage; (3), floating the sterile anther in the mid-late uninucleate stage in the liquid culture medium, carrying out dark shake culture for 20-25 days, and then carrying out illumination shake culture; (4), after carrying out illumination shake culture for 10-20 days, transferring a formed cytoledon-stage embryo to an MSO solid culture medium for being cultured, and growing into a normal plant. The culture method disclosed by the invention has the advantages that (1), the induction frequency of a normal embryo is greatly increased, the regeneration frequency of the normal plant is remarkably increased; (2), the operation process is simple, and the plant can be directly obtained from microspores freely dispersing in the liquid culture medium; (3), the culture method is suitable for multiple types of peppers such as cow-horn peppers, capsicum, line peppers and sweetbell redpeppers.

The invention discloses an automatic aeration device for fresh-water fish breeding and a use method thereof. The automatic aeration device comprises a connecting plate, a protective net cover and an annular air bag, wherein the middle of the annular air bag is provided with an annular air bag middle hole, a connecting water pipe is arranged in the annular air bag middle hole, a transparent housingis arranged above the annular air bag, one side of the transparent housing is provided with a first aeration air pump, a first air inlet pipe is arranged above the first aeration air pump, and the side, away from the transparent housing, of the first aeration air pump is provided with a first aeration pipe. The automatic aeration device has the advantages that dissolved oxygen detection and aeration work can be automatically completed by the arrangement of a dissolved oxygen detector, an aeration circulating water pump and the aeration air pump, underwater stirring can be performed by the arrangement of a stirring motor to improve the oxygen dissolving speed, the automatic aeration device saves more energy and is more environmentally and friendly by the arrangement of a solar panel, can be remotely controlled to move by the arrangement of a wireless receiver, a stepping motor and an advancing water pump and is more convenient to use.

The invention provides a household sewage treatment device of a circulating fluidized bed.The household sewage treatment device comprises an anaerobic reaction unit, an aerobic reaction unit and a filtering and precipitating unit.A water inlet is formed in the upper portion of the anaerobic reaction unit, and a stirring air pipe is arranged at the bottom of the anaerobic reaction unit.The aerobic reaction unit is filled with efficient biocompatibility filler.A filter material bearing plate is arranged at the lower portion of the filtering and precipitating unit, and a cover plate is arranged at the upper portion of the filtering and precipitating unit.The space between the filter material bearing plate and the cover plate is filled with a filter material.A water outlet is formed in the upper portion of the filtering and precipitating unit, and the bottom of the anaerobic reaction unit is communicated with the upper area of the filler cover plate of the aerobic reaction unit through a first connecting pipe.The bottom of the aerobic reaction unit is communicated with the lower area of the filter material bearing plate through a second communicating pipe.The upper portion of the anaerobic reaction unit is communicated with the lower area of the filter material bearing plate through a backflow pipe.The household sewage treatment device has the advantages of being high in sewage treatment efficiency, small in occupied area, capable of easily making the sewage treatment result to reach the standards and the like.

The invention discloses a strain breeding culture device, which comprises a cabinet body, wherein a storage device used for accommodating a sample bottle is arranged inside the cabinet body, and comprises a base and a rotating center rod positioned on the base; the rotating center rod is in vertical arrangement; 2 to 8 position limiters are axially arranged on the rotating center rod; a sample storage disc is arranged on each position limiter; a rotating center hole is formed in the center of each sample storage disc; the sample storage discs are arranged on the outer periphery of the rotatingcenter rod in a sleeving way through the rotating center holes; each sample storage disc is in a fan shape; the central angle of the fan shape is 300 to 330 degrees. The tight stacking can be realized among the sample storage discs; the goal of occupying a small space can be further achieved. The problem of great occupied space of the sample bottle is solved, so that the space occupation ratio problem of the whole device can be solved. The strain breeding culture device has the advantages that the structure is compact; the space occupation is small; the applicability and the practicability are high.

The invention discloses a control system and method for culture parameters of a bioreactor. The system comprises a main control unit, sub-control units, a tray and a cell culture bag, wherein the maincontrol unit is used for receiving parameter information set by a user and controlling each sub-control unit to perform corresponding operations according to the parameter information; the sub-control units comprise a temperature control unit, a liquid control unit, a gas control unit and a shaking control unit; the temperature control unit, the liquid control unit, the gas control unit and the shaking control unit are controlled by one main control unit. The bioreactor is different from the existing disposable bioreactor in system architecture and structural form, and each sub-control unit belongs to closed loop control, so that the whole system has high control precision, good control stability and quick system response.

The invention discloses a silk fabric coated microporous pipeline, and belongs to a microporous pipeline. The silk fabric coated microporous pipeline comprises a microporous pipe; and the outer wall of the microporous pipe is coated with a woven silk fabric, so that water penetration uniformity or oxygen dissolving rate is effectively improved, micropores are hard to block, and the silk fabric coated microporous pipeline can be widely applied to agricultural irrigation, garden greening, aquaculture oxygen increase and the like.

A novel environment-friendly oil pollution disposal device comprises a hull of an oil drawing boat. One side of the front face of the hull is provided with a first rotating shaft, and the first rotating shaft penetrates through the front face of the hull and is connected with the hull through a bearing; a plurality of rectangular water scraping plates are fixedly installed on the periphery of a chain plate, and the water scraping plates are perpendicular to the chain plate; and the periphery of a second rotating shaft is provided a lifting device capable of making the second rotating shaft swing up and down, and the lifting device is located behind the chain plate. The novel environment-friendly oil pollution disposal device is suitable for disposing oil pollution after oil leakage on thesea. When the device is in an initial state, the water scraping plates achieve an effect similar to the water pushing effect of paddles to generate leftward thrust on the hull; when the hull advancesleftwards, the load of a hull power device can be reduced; and when a user makes the motor rotate clockwise through a controller, the chain plate drives the water scraping plates to rotate clockwise at this time, the water scraping plates push water leftwards to generate rightward thrust on the hull, and the hull can be assisted in braking or backing.

The invention provides a method for reducing water eutrophication. The method is that a submerged plant and a filter freshwater bivalve mollusk are bred in eutrophic water, wherein the submerged plant comprises one or more than two selected from Myriophyllum, Elodea, Ceratophyllum, and Hydrilla varticillata, and the filter freshwater bivalve mollusk is hyriopsis cumingii. Compared with some present floating technologies, the method of the invention not only utilizes roots of the submerged plant to absorb nitrogen and phosphor, but also utilizes leaves of the submerged plant to absorb eutrophic substances in water, so the oxygen dissolving rate of water is improved; and the method of the invention has the advantages of simple operation, low cost, no secondary pollution, and generation of certain economic benefits through combining with the aquatic product culture.

The invention relates to a filter material for the fuel filter, an in particular relates to fuel-saving filter paper for the fuel filter. The fuel-saving filter paper is composed of filter paper coated with an efficient, environmentally-friendly and fuel-saving nanometer complete combustion agent. The efficient, environmentally-friendly and fuel-saving nanometer complete combustion agent comprises the components in parts by weight: 15-30 parts of methyltrimethoxysilane, 8-10 parts of nanometer ferric oxide, 5-15 parts of nanometer chromium oxide, 5-20 parts of nanometer antimony-doped tin oxide, 6-15 parts of silica gel, 15-30 parts of isopropanol, 1-3 parts of citric acid and 15-25 parts of water. The preparation method of the fuel-saving filter paper comprises the following steps of: adding the components in a high energy mixer according to the formula to mix and disperse for 10-15 hours and then coating the mixture on the surface of the filter paper. By coating the efficient, environmentally-friendly and fuel-saving nanometer complete combustion agent on the surface of the filter paper of a filter element, special infrared rays and radio waves are used to activate and refine the fuel and separate impurities, the dissolved oxygen rate of the fuel is increased, the fuel can be easily atomized and ignited, the combustion is more complete, the power is increased, the fuel-saving effect is realized and harmful gases are reduced so as to protect the environment.

The invention aims to provide a fresh and alive aquatic product storage and transportation device to increase the survival rate of aquatic products in the transportation process. The fresh and alive aquatic product storage and transportation device comprises a box body and a box cover which can be buckled to the box body in a sealed mode, and is characterized in that a partition board is arrangedat the bottom of the box body, and vent holes are uniformly formed in the partition board; a net-shaped inflating tube is arranged below the partition board, and air outlets are formed in the top surface of the air inflation tube at intervals; a pressurizing machine, an air conditioner and an oxygenerator are fixed outside the box body, an air outlet of the pressurizing machine is connected with the interior of the box body through a pipeline, and an oxygen outlet of the oxygenerator and a cold air outlet of the air conditioner run through the side wall of the box body and are communicated with the air inflation tube. The fresh and alive aquatic product storage and transportation device changes a traditional oxygen increasing mode, the dissolved oxygen amount in water is increased, therefore the water product survival rate is increased, high-density storage and transportation can be achieved, and good practicability is achieved.

The invention relates to an improved water quality purifying material for aquiculture. The improved water quality purifying material is prepared from the following raw materials in parts by weight: 9-16 parts of potassium ferrate, 5-9 parts of cationic-type polyacrylamide, 5-7 parts of zeolite powder, 2-5 parts of citric acid, 1-5 parts of chitosan, 1-4 parts of cypress, 0.5-2 parts of thyme, 1-3 parts of tribute orange peel, 2-5 parts of cinnamomum camphora, 5-8 parts of sodium bicarbonate, 6-10 parts of sodium borate, 2-6 parts of magnesium chloride, 5-10 parts of magnesium lauryl sulfate and 5-9 parts of microbial flora. The improved water quality purifying material for aquiculture, which is disclosed by the invention, can be used for purifying water, increasing the oxygen dissolution rate of a water body and reducing the harm of feeds and the like on the water quality.

The invention discloses a three-dimensional overlap-type deep-flow-channel drip irrigation soilless cultivation device. The device comprises a solution dispenser, field planting baskets with a liquidstorage function and closed cultivation pots. The solution dispenser is arranged at the top end, each closed cultivation pot comprises a bottom cover, upper covers and planting cups, the bottom coverand the upper covers have seal assembling, each planting cup is arranged on one upper cover, each planting cup is arranged obliquely, one field planting basket with the liquid storage function is placed in one planting cup, the top surfaces of the upper covers and the bottom surface of the bottom cover are separately provided with a plurality of limit overflow openings, the closed cultivation potsare overlapped from the top to the bottom, and limit overflow openings arranged in the top-end closed cultivation pots are located directly below outlets of the solution dispenser. The device provided by the invention has a three-dimensional cultivation structure, so that a sunlight utilization rate of plant growth can be improved; the device has an overlap-type drip irrigation structure, so thata solution fully absorbs oxygen in air in the circulation process; the device has an overlap-type drip irrigation and the deep flow channel structure, so that from the perspective of growth characteristics of plants, a water absorption function of a tap root system and respiration of lateral roots of the plants can be fully taken into account.

The invention discloses a tower-type clam worm biofilter which comprises a tower-shaped filter body (1), and is characterized in that a water inlet pipe (2) is disposed at the top end of the tower-shaped filter body (1); a water outlet pipe (3) is disposed at the lower part of the tower-shaped filter body (1); an inverted cone-shaped dirt collector (4) is disposed at the bottom of the tower-shaped filter body (1); a dirt discharge pipe (5) with a valve is disposed and communicated with the cavity of the dirt collector (4); a clam worm layer (6), a clapboard (7) with meshes, a ceramsite layer (8), a quartz sand layer (9) and a volcanic rock layer (10) are orderly disposed from up to down in the inner wall of the tower-shaped filter body (1) between the water inlet pipe (2) and the water outlet pipe (3); the clam worm layer (6) has a thickness of 20-30 cm, and is made of Chinese medical stone with a particle size of 0.5-1 mm.

The invention discloses a material for industrial wastewater treatment. The material is made of raw materials comprising, by weight, 6-14 parts of aluminum polychlorid, 3-11 parts of lime, 6-14 parts of diammonium hydrogen phosphate, 4-8 parts of outer shell powder of a shell, 3-11 parts of ferric sulfate, 7-10 parts of closed cell perlite, 5-7 parts of microelements, 1-5 parts of powdered sulfur, 6-12 parts of bio-active humic acid, 6-8 parts of brassinolide, 1-5 parts of mycorrhizal fungi, 6-12 parts of aluminum hydroxide, 8-13 parts of gum dammar and 2.5-6 parts of pimacol. The material has the advantages that heavy metal ions can be restored, toxic substances floating in water are flocculated, and oxygen dissolving rate in water is increased.

The invention relates to the technical field of sewage treatment equipment, in particular to integrated equipment for sewage chemical treatment, which comprises a shell; a filtering mechanism arranged on the inner side of the shell and used for filtering impurities in sewage entering the shell; an aeration mechanism arranged between the filtering mechanism and the shell; wherein the aeration mechanism comprises an aeration box, and the aeration box is fixedly connected with the shell; an air inlet assembly arranged between the aeration box and the shell; and an aeration assembly arranged between the filtering mechanism and the aeration box and connected with the air inlet assembly, wherein the filtering mechanism and the aeration mechanism are arranged, and the air inlet assembly is matched with the aeration assembly, so that not only is contact between sewage and air realized, but also the air can be in full contact with the sewage, and therefore, the sewage after sewage treatment can have a relatively high dissolved oxygen rate.

The invention relates to the technical field of aquaculture, in particular to a high-density breeding method used for a green crab breeding pond. Green crabs are bred in the pond. The method is characterized in that a plurality of earth ridges are arranged in the pond and used for dividing a water area in the pond into continuous circulating water channels; water in the pond directionally and circularly flows in the circulating water channels; oxygenation devices used for filling the bottom of the water with oxygen are arranged in the water channels of the pond and used for providing power for water circulation; the earth ridges are provided with gentle earth ridge inclined surfaces; the slope of each earth ridge inclined surface is not greater than 1 / 3; aquatic weeds are planted on the earth ridge inclined surfaces. The earth ridges are arranged in the pond, so that the suitable crab breeding area in the pond is enlarged, the crab breeding density in the pond is greatly increased, and the breeding density can be increased by more than three times in comparison with that of a conventional crab pond; the earth ridges are used for dividing the water area in the pond into the continuous water channels, a water body flows, the dissolved oxygen amount is high, and the slope of each earth ridge is small, so that the crabs can be prevented from making holes.

The invention provides a biological reaction device and a biological reaction method, the biological reaction device comprises a shell, a stirring module and a jet flow module located at the bottom ofthe shell are arranged in the shell, the stirring module comprises a stirring shaft extending into the shell, and at least one radial flow paddle and at least one axial flow paddle are arranged on the stirring shaft. The biological reaction method comprises the steps that reactants are injected into the shell, the stirring module is started to perform stirring reaction on the reactants, and gas generated by the reaction enters the jet flow module through a circulating pipeline and is jetted into the shell through the jet flow module. By combining the jet module and the stirring module, mass transfer and heat transfer are better achieved, the reactants are fully mixed and react, the gas circulates in the reaction device through the circulating pipeline, the production efficiency of the biological reaction device can be effectively improved, and the biological reaction device has the advantages of being low in cost, small in occupied area, easy to maintain and the like and can be applied to the fields of food, medicine and the like.

The invention relates to an efficient and vertical fermentation tank and belongs to the technical field of fermentation devices. The fermentation tank comprises a vertical tank body, a motor, a speed reducer driven by the motor and a stirring shaft, wherein the lower end of the stirring shaft penetrates into the tank body, multiple stirring blades are arranged at the lower end of the stirring shaft at intervals, multiple helical channels sequentially are formed in the inner wall of the tank body from top to bottom, each helical channel is formed by splicing multiple helical blades fixed to the inner wall of the tank body along the central axis of the tank body in a surrounding mode and is provided with a through channel for containing the corresponding stirring blades, one stirring blade is located at the lower end of the corresponding helical channel and is same as the corresponding helical channel in helix angle, a zooming plate inclining towards the stirring shaft is arranged at the upper end of the helical channel, and the surfaces of the helical blades and the zooming plates are coated with continuous polytetrafluoroethylene coatings. The fermentation tank has the advantages that the structure is simple, and the oxygen dissolution rate can be remarkably improved without increase of stirrer diameter and rotation speed.

The present invention relates to a new-type self-feeding gas-liquid two-phase nozzle with projected circular ring structure. It includes an internal cylinder, an external cylinder and an intermediate cylinder. The lower end of said internal cylinder is equipped with a reducing liquid-spraying nozzle, an air suction inlet is set on the external cylinder, the internal cylinder is cover-mounted and fixed in the intermediate cylinder, in the front position of liquid-spraying nozzle in the intermediate cylinder interior a projected circular ring body is set and between the liquid-spraying nozzle and projected circular ring body a circular ring gap is formed, on the intermediate cylinder the air distributing holes are arranged and the reduced neck of the projected circular ring body is equipped with air distributing holes which are communicated with and correspondent to the above-mentioned air distributing holes, between the external cylinder and intermediate cylinder an distributing chamber is set. Its structure is novel, and its oxygen dissolubility is high.

The invention discloses a double-pulse fundamental wave jet aerator. The double-pulse fundamental wave jet aerator comprises an air inlet pipe, a throat pipe and a diffusing pipe which are communicated with one another in sequence; a water outlet is formed in the lower end of the diffusing pipe; the upper end of the air inlet pipe is closed, and an air inlet is formed in the side wall of the upper end of the air inlet pipe; a water inlet pipe is arranged at the upper part of the air inlet pipe; the top end of the water inlet pipe is closed; the lower end of the water inlet pipe penetrates through the top end of the air inlet pipe and extends into the air inlet pipe; a jet nozzle is arranged at the lower end of the water inlet pipe; a water inlet is formed in the side wall of the upper end of the water inlet pipe; one side of the water inlet is connected with a bypass pipeline; the bypass pipeline penetrates through the top end of the water inlet pipe, extends into the lower end of the water inlet pipe and is communicated with the jet nozzle; an electromagnetic valve is arranged on the bypass pipeline. In an alternate powering on and off process of the electromagnetic valve under the control of the aerator disclosed by the invention, a fluid forms alternate instable fluids in the water inlet pipe and the bypass pipeline, so that external and internal fluids at two different flowing speeds can be formed; therefore, the inspiratory capacity is increased, and the jet aeration efficiency is improved.

The invention relates to an efficient and vertical fermentation tank and belongs to the technical field of fermentation devices. The fermentation tank comprises a vertical tank body, a motor, a speed reducer driven by the motor and a stirring shaft, wherein the lower end of the stirring shaft penetrates into the tank body, multiple stirring blades are arranged at the lower end of the stirring shaft at intervals, multiple helical channels sequentially are formed in the inner wall of the tank body from top to bottom, each helical channel is formed by splicing multiple helical blades fixed to the inner wall of the tank body along the central axis of the tank body in a surrounding mode and is provided with a through channel for containing the corresponding stirring blades, one stirring blade is located at the lower end of the corresponding helical channel and is same as the corresponding helical channel in helix angle, a zooming plate inclining towards the stirring shaft is arranged at the upper end of the helical channel, and the surfaces of the helical blades and the zooming plates are coated with continuous polytetrafluoroethylene coatings. The fermentation tank has the advantages that the structure is simple, and the oxygen dissolution rate can be remarkably improved without increase of stirrer diameter and rotation speed.

The invention relates to microbial aerobic culture equipment and especially relates to a device and a method for flat membrane oxygen-supply self-circulation-type microbial culture and belongs to the technical field of environmental protection. The device comprises an air feed pump, an inlet valve, a gas flow meter, a heater, a liquid seal bottle, a gas storage tank, an air intake, a hydrophobic microporous flat membrane, a membrane support porous plate, a self-circulation guide cylinder, a feeding and sampling opening, an inoculation opening, a gas outlet, an upper cover and an outer wall. Air is dispersed into air bubbles by the hydrophobic microporous flat membrane, passes through the membrane support porous plate and then enters into a cavity of a culture container. Based on relative positions of ventilative small apertures in the membrane support porous plate and the self-circulation guide cylinder, a lifting liquid medium forms external circulation relatively to the self-circulation guide cylinder and also forms inner circulation. Through culture liquid circulation, microbes in the liquid medium suspend so that the microbes fully contact with air. The device and the method solve the problem that a traditional membrane bioreactor needs an additional air filter and a disturbance or stirring device.