157 results about "Biological decontamination" patented technology

The invention relates to the technical field of ultrapure water preparation, and particularly discloses ultrapure water preparation equipment with a biological pretreatment filter and a process thereof.The ultrapure water preparation equipment comprises a base, a frame is fixedly mounted at the top of the base, an ultrapure water preparation device is mounted in the frame, a biological purifier is mounted on one side of the ultrapure water preparation device, and the biological purifier is mounted on the other side of the ultrapure water preparation device; a driving mechanism, a cleaning mechanism and a water guide mechanism are arranged for cooperative operation, powerful assistance is provided for ultrapure water preparation, and a second motor is started; the rotating shaft is driven to rotate through the linkage of the synchronous wheel and the synchronous belt, so that the auger and the cleaning arm work in the activated carbon adsorption barrel, the cleaning arm cleans the inner wall to prevent blockage, the auger promotes water to surge, and the purification efficiency is improved; filtered water is rapidly dredged to enter a subsequent treatment unit, so that efficient and smooth preparation of ultrapure water is realized, and the production efficiency is further improved.

The invention relates to the technical field of sewage treatment, in particular to a domestic sewage treatment system which comprises an impurity removal box and a second water pipe, a disinfection barrel is integrally formed on the right side of the impurity removal box, a water pump is fixedly installed at the bottom of the inner side of the disinfection barrel, and one side of the disinfection barrel communicates with a first water pipe. A biological purification box is fixedly connected to the end, away from the disinfection cylinder, of the first water pipe, the front side of the biological purification box communicates with an ultrafiltration cylinder through a second water pipe, and a drainage pipe is fixedly connected to one side of the ultrafiltration cylinder; and a mounting frame is fixedly connected between the inner walls of the impurity removal box. According to the improved sewage treatment system, impurities in sewage are removed through the impurity removal box, then the sewage is disinfected and precipitated through the disinfection cylinder, the impurity removal box provides power for a stirring part of the disinfection cylinder when working, meanwhile, the sewage enters the disinfection cylinder to trigger a buoyancy air bag to automatically add disinfection powder into the disinfection cylinder, and the disinfection powder is matched with rotation of the main shaft; the powder is automatically and uniformly thrown into the sewage.

The invention provides a water quality purification system and method for an ecological wetland, and relates to the technical field of ecological wetlands, and the water quality purification system comprises a pretreatment module which is used for preliminarily filtering and separating large-particle suspended matters, floating matters and part of organic matters flowing into a water body; through the arrangement of the multi-stage biological purification module, a water body is sequentially introduced into the multi-stage treatment unit comprising the pretreatment module, the multi-stage biological purification module, the multiple oxidation module and the ecological restoration module, staged efficient removal of nitrogen, phosphorus, heavy metals and organic pollutants is realized, and especially in the multi-stage biological purification module, the treatment efficiency is improved. Through the synergistic effect of the artificial floating bed filter tank, the gravel matrix filter tank and the plant-microorganism symbiotic filter tank, the decomposition, adsorption and removal capacities of pollutants are greatly improved, meanwhile, the water body retention time and flow state distribution are optimized, the short flow phenomenon is effectively avoided, and the adaptability and treatment efficiency of the system under the complex polluted water body condition are improved.

The invention relates to photosynthetic bacterium water quality purifying agent preparation equipment and a preparation system thereof, and relates to the technical field of microorganism water quality purification, the photosynthetic bacterium water quality purifying agent preparation equipment comprises a barrel, a cover plate is installed on the barrel, a filter screen is arranged on the cover plate, the filter screen is detachably arranged on the cover plate, and the filter screen is arranged in the barrel in a sliding mode after being detached; a driving mechanism is arranged between the barrel and the filter screen and comprises a supporting block, a driving electric cylinder and an organ plate, a sliding groove penetrating through the side wall of the barrel is formed in the barrel, the supporting block is arranged in the sliding groove in a sliding mode, and the supporting block abuts against the end, away from the cover plate, of the filter screen; the driving electric cylinder is installed in the sliding groove and drives the supporting block to slide in the sliding groove, the organ plate is arranged in the sliding groove in a folded mode, one end of the organ plate is fixedly arranged at the bottom of the sliding groove, the other end of the organ plate is fixedly arranged on the supporting block, and the supporting block slides to drive the organ plate to be stretched and folded in the sliding groove. The effect of improving the production efficiency of the photosynthetic bacterium water quality purifying agent is achieved.

The utility model discloses a rural resident domestic sewage recycling treatment device, which relates to the field of sewage treatment and comprises a septic tank, a hydrolytic acidification tank, an oil separation well, an anaerobic purification tank and an ecological digestion tank. According to the treatment mode of the utility model, the treatment of sewage generated by domestic kitchen, washing, cleaning and bathing sewage is added, the combination of resource utilization and an agricultural production structure is preferentially considered, and the treatment technologies of hydrolytic acidification, anaerobic purification, multi-medium biological purification, small vegetable garden / small garden ecological digestion pool and the like are adopted; rural domestic sewage treatment is combined with rural courtyard economy and agricultural green development, and rural domestic sewage resource utilization is achieved nearby on site.

The invention discloses stenotrophomonas maltophilia CJY with hydroxybenzophenone degradation capacity and application of the stenotrophomonas maltophilia CJY. The stenotrophomonas maltophilia CJY is taken from sludge of a sewage plant and has an efficient degradation effect on hydroxybenzophenone; pollutants can be completely converted into harmless substances such as CO2 and H2O, so that the method has a wide application prospect in biological purification of industrial waste gas and wastewater. According to the stenotrophomonas maltophilia CJY disclosed by the invention, the removal rate of 50 mg / L of hydroxybenzophenone in an environment with the pH value of 7 can reach 50%, and the removal rate of hydroxybenzophenone within 125 mg / L can reach 30%.

A multi-layered bio purifier includes a plurality of layers. Each layer may include a membrane having a first side and a second side opposite the first side, a first channel formed on the first side, and a second channel formed on the second side. Further, each layer may include a first type of cells formed on the first side in the first channel and a second type of cells formed on the second side in the second channel. The multi-layered bio purifier includes a first manifold assembly to split incoming blood into the first channel and the second channel of the plurality of layers and a second manifold assembly to combine processed blood from the first channel and the second channel of the plurality of layers. The processed blood may include detoxified or purified blood.

The application provides a composite microbial agent, application of the composite microbial agent and a treatment method of high-concentration organic wastewater. The active component of the composite microbial agent provided in the first aspect of the application comprises two or three of Paecilomyces varioti MM2 strain, Aspergillus fumigatus MM6 strain, Candida rugosa MJ4 strain and Bacillus licheniformis MX8 strain. The composite microbial agent provided in the first aspect of the application can be used for biological decontamination treatment of high-concentration organic wastewater, so as to realize degradation of organic pollutants in the high-concentration organic wastewater and pH value adjustment, thereby avoiding increase of the load of a municipal sewage treatment system.

An EBDLR system includes a multi-layered bio purifier having a plurality of layers. Each layer includes a membrane, a first type of cells on a first side of the membrane in a first channel, and a second type of cells on a second side of the membrane in a second channel. The EBDLR includes a plasma separator to receive blood from a subject and separate a plasma component from the blood, a first reservoir to collect the plasma component, and a second pump to move the plasma component from the first reservoir to the multi-layered bio purifier. The multi-layered bio purifier distributes the plasma component into the first and second channels of each layer to purify the plasma component. The EBDLR includes a second reservoir to collect the purified plasma component and a third pump to infuse the purified plasma component from the second reservoir into the subject.

The invention belongs to the technical field of decontamination, and particularly discloses a sea cucumber artificial culture biological decontamination device which comprises a culture pond, side tables are fixedly installed on the two sides of the top of the culture pond, L-shaped moving tables are movably installed above the two side tables, and through grooves are formed in the surfaces of the ends, located in the culture pond, of the L-shaped moving tables. A through groove is formed in the top of the culture pond, a swing mechanism is installed in the through groove, extrusion mechanisms are installed at the four end corners of the top of the culture pond, a reset mechanism is arranged at the top of the swing mechanism, and a material pushing plate is movably arranged in the culture pond. The L-shaped moving table and the material pushing plate horizontally move in the culture pond, the material pushing plate can push impurities floating on the water surface of culture water to the end of the culture pond, workers can conveniently clean the impurities on the water surface, under cooperation of the extrusion mechanism and the swing mechanism, the material pushing plate can incline, the impurities on the water surface of the culture water can be lifted up, and therefore the impurities on the water surface of the culture water can be removed. And the cleaning of the impurities by workers is further facilitated.

The invention relates to the technical field of VOCs waste gas purification treatment of oil and gas field produced water, in particular to a treatment device for VOCs waste gas discharged from oil and gas field produced water and a waste gas treatment method of the treatment device. An ultraviolet photolysis and power device is communicated with a VOCs waste gas input pipeline, and a pressurized waste gas output pipeline is communicated between the ultraviolet photolysis and power device and a biological purification trickling filter device; a circulating liquid input pipeline is communicated between the biological purification trickling filter device and the ultraviolet photolysis and power device, a circulating liquid output pipeline is communicated between the ultraviolet photolysis and power device and the biological purification trickling filter device, and the biological purification trickling filter device is communicated with a purified standard waste gas discharge pipeline. An ultraviolet photolysis oxidation technology is used as a pretreatment process, and then purified standard waste gas is obtained through a biological treatment process. The VOCs waste gas in the produced water of the oil and gas field is treated by adopting a green and environment-friendly process technology, the process is simple, the treatment efficiency is high, and the VOCs treatment cost of an enterprise is reduced.

The invention relates to the technical field of purification devices, in particular to an ecological aquaculture sewage multi-stage biological purification device which comprises a foundation plate, a first-stage purification pond, a second-stage purification pond and a third-stage purification pond are fixedly arranged on the foundation plate, and multi-stage biological purification of sewage is achieved through the first-stage purification pond, the second-stage purification pond and the third-stage purification pond; the biological membrane bearing plates are respectively positioned in the first-stage purification tank, the second-stage purification tank and the third-stage purification tank and are used for forming biological membranes to realize biological purification of the sewage; when the biological membrane bearing plates are installed, the biological membrane bearing plates only need to be connected to the installation bearing blocks in a sleeving mode, then the hydraulic rod pieces are started, the multiple biological membrane bearing plates can be automatically fixed, manual fixing operation on the biological membrane bearing plates is not needed, the operation is very convenient and rapid, meanwhile, the biological membrane bearing plates can be driven to move into the corresponding purification ponds, and the working efficiency is improved. The mounting efficiency of the biological membrane bearing plate is improved to a great extent, and the working intensity of workers is relieved.

The utility model discloses an ecological purification system for a water intake of a riverway, which relates to the technical field of water ecological purification and particularly comprises a first soft enclosure, a second soft enclosure and a third soft enclosure, the first soft enclosure, the second soft enclosure and the third soft enclosure are sequentially arranged and are all in a similar arc shape, the first soft enclosure is arranged on an upstream face, and the second soft enclosure is arranged on a downstream face. The second soft enclosure is arranged on the inner side of the water intake; a filtering area is formed between the first soft enclosure and the second soft enclosure, a filtering assembly is arranged in the filtering area, a floating island area is formed between the second soft enclosure and the third soft enclosure, aquatic plants and first filler are arranged in the floating island area, and the first filler is arranged below the aquatic plants. According to the ecological purification system for the riverway water intake, the three soft enclosures are designed, the filtering area and the floating island area are formed, functional distinguishing is achieved, water at the water intake is purified in the modes of physical filtering, biological purification and ecological buffering, the water quality of the water intake is remarkably improved, and burden is relieved for subsequent water treatment.

The embodiment of the application provides a biological deodorization and demisting device, a filler preparation method and application in mixed waste gas treatment, and belongs to the technical field of biological purification and waste gas treatment. The device comprises: a pretreatment unit comprising a gas distributor and a spraying humidifier arranged together; a biological reaction unit for biodegradation of waste gas discharged from the pretreatment unit, which comprises at least one layer of composite filler layer, and catalyst is loaded in the layer height direction by layered spraying, and composite bacteria are loaded on the layer surface; a demisting unit comprising a demister and a separator for hierarchical and collaborative removal of mist droplets; and a control unit for real-time monitoring and adjustment of temperature, humidity, pH value, bacteria activity and pollutant concentration. The application realizes efficient and collaborative purification of H2S, NH3, VOCs and oil mist droplets in mixed waste gas, improves biological activity in the filler and prolongs the replacement cycle.

The invention relates to a method for the bio-decontamination of an aqueous solution held in a tank on board a motor vehicle having a combustion engine. According to the invention, this method comprises the following steps: • Obtaining information encoded in a navigation system or GPS system, said information comprising at least a first journey time, tr1; • If the first journey time, tr1, is greater than a first time value, t1, triggering the heating of the aqueous solution held in the holding tank in order to reach a first temperature of the aqueous solution, T1, at least equal to 60°C for a second time value, t2, • Keeping the aqueous solution at at least said first temperature of the aqueous solution, T1, for a third time value, t3.

The invention relates to the technical field of wastewater multi-stage treatment and recycling, and particularly discloses a polyester fabric dyeing and finishing wastewater treatment and recovery device which comprises a regulating tank, a primary sedimentation tank, a microbial flocculation reaction tank, a secondary sedimentation tank and a clarification tank which are sequentially arranged, flocculation receiving nets are movably arranged in the primary sedimentation tank, the microbial flocculation reaction tank and the secondary sedimentation tank, and lifting mechanisms matched with the three flocculation receiving nets are mounted on the front sides of the primary sedimentation tank, the microbial flocculation reaction tank and the secondary sedimentation tank. Secondary sedimentation removal of pollutants is achieved through the primary sedimentation tank and the secondary sedimentation tank, a biological purification mode is introduced through the microbial flocculation reaction tank and combined with traditional physical and chemical modes, and ozone is introduced through the clarification tank for oxidation disinfection treatment, so that the advantages of various treatment methods are brought into full play, and the treatment effect is good. And pollutants can be removed to the greatest extent.

The present application relates to wastewater multistage treatment recycling technical field, specifically disclose a kind of polyester fabric dyeing and finishing wastewater treatment recovery device, including the adjustment pool, primary settling tank, microbial flocculation reaction tank, secondary settling tank, clarifying tank that are sequentially arranged, the coarse grating filter screen is installed in the adjustment pool, the condensation flocculation net is movably arranged in the primary settling tank, microbial flocculation reaction tank and secondary settling tank, the lifting mechanism matched with three condensation flocculation nets is installed in the primary settling tank, microbial flocculation reaction tank and secondary settling tank front side.The present application realizes the secondary settlement removal of pollutant by primary settling tank, secondary settling tank, introduces biological purification mode by microbial flocculation reaction tank, combines with traditional physical, chemical method, introduces ozone and carries out oxidation disinfection treatment by clarifying tank, to fully exert the long of various processing methods, so that pollutant is removed to the greatest extent.

The present invention relates to an in-situ biological purification system and method for treating eutrophic water bodies. The purification system comprises several biological purification modules installed in-situ within the water body. Each biological purification module includes a passive protection unit and an active protection unit. The passive protection unit comprises a plurality of fixed fish-repelling isolation devices, which together form a zooplankton protection zone within the water body. The active protection unit comprises a mobile, pursuit-type active fish-repelling device. Advantageously, the in-situ biological purification system continuously repels fish through fish-repelling signals such as bubbles, sound, and light, thereby forming an in-situ zooplankton protection zone in a specific area of the water body. This system fully utilizes the natural water surface to create a protective habitat for zooplankton, reduces predation intensity, increases zooplankton survival rate, biomass, and the proportion of large individuals, and replenishes zooplankton biomass throughout the lake or reservoir, thereby rapidly depleting algae in-situ and achieving the ultimate goal of water pollution control and the protection and restoration of the aquatic ecological environment.

The invention relates to a microbial agent for removing refractory COD (Chemical Oxygen Demand) in wastewater and application of the microbial agent, and belongs to the technical field of biological purification. The invention provides a microbial agent for removing refractory COD (Chemical Oxygen Demand) in wastewater. The microbial agent is prepared from two or more of geomonas, rope warming bacteria, nitro-spirillum, thiobacillus, urea bacillus, leptospirillum, piriformospora, floating fungi, nitro-spina bacteria, thauera and hyphomicrobe. The microbial agent can remove part of refractory COD (Chemical Oxygen Demand) by utilizing the synergistic effect and co-metabolism of biocenosis, and has a great application prospect in the treatment of wastewater (such as landfill leachate and the like) containing a large amount of refractory COD.

The invention discloses landscape sewage pretreatment equipment, and relates to the field of sewage treatment.The landscape sewage pretreatment equipment comprises an upper box body and a lower box body, the upper box body is connected to the upper portion of the lower box body, a water inlet pipe and a water outlet pipe are fixedly connected to the side face of the upper box body, and a surrounding plate is fixedly connected to the interior of the upper box body and divides the inner space of the upper box body into a primary filtering cavity and a water return cavity; the water inlet pipe is communicated with the primary filter cavity, the water outlet pipe is communicated with the water return cavity, a filter screen is arranged at the bottom of the primary filter cavity, and sewage entering the primary filter cavity enters the lower box body through the filter screen. Sewage is filtered by the filter screen, purified and decomposed by microorganisms and filtered by the filter element in sequence after being introduced into the upper box body, the sewage is fully purified through three-stage treatment, the filter screen can preliminarily filter large impurities, the microorganisms can purify and decompose organic matters, and the filter element can filter out fine solid impurities; meanwhile, equipment does not need to be shut down when the filter element needs to be replaced in the whole filtering process, normal operation of equipment such as a landscape fountain is guaranteed, and the using effect is good.

The utility model discloses a water purification device for prawn culture, which comprises a sediment filter tank, a biological purification tank, an adsorption tank and a disinfection tank, the top of the left end of the sediment filter tank is communicated with the bottom of a water inlet pipeline, a first control valve is arranged at the joint of the water inlet pipeline and the sediment filter tank, and the water inlet end of the water inlet pipeline is connected with a culture pond water outlet pipe; a first filter screen and a second filter screen are arranged in the sediment filter box, the first filter screen is located on the left side of the second filter screen, the right end of the sediment filter box is communicated with the left end of the biological purification box through a communication pipeline, a valve is installed on the communication pipeline, and a cleaning water inlet pipe used during cleaning is arranged at the right end of the sediment filter box. The device realizes graded filtration of solid impurities with different particle sizes in the aquaculture water, can efficiently intercept various solid pollutants such as residual feeds and shrimp shells, effectively reduces the content of suspended solids in the water, and reduces the burden for the subsequent purification link.

The application discloses a hydrophilic round square membrane bed biological purification system and method, which comprises an aerobic main body reaction unit, one end of the aerobic main body reaction unit is provided with a unit inlet overflow pipe part, and the other end is provided with a unit outlet overflow pipe part, a water passing arc wall part is arranged in the aerobic main body reaction unit, the water passing arc wall part comprises a front area mixed medicine arc wall part, a interception and filtration purification arc wall part and a rear area mixed medicine arc wall part, a water round square membrane bed part is arranged between the front area mixed medicine arc wall part and the interception and filtration purification arc wall part, an air inlet of the water round square membrane bed part is connected with an aeration oxygen supply part, and air inlets of the front area mixed medicine arc wall part and the rear area mixed medicine arc wall part are connected with front and rear arranged medicine adding parts; the application can efficiently and quickly and with energy saving and low consumption deal with organic or inorganic pollutants with normal chain functional groups which are carried in water.

This invention discloses a novel biological deodorization and purification device, comprising a shell, a pretreatment section, a biological purification section, an induced draft fan, a collection duct, and a delivery duct. The pretreatment section includes three parallel chambers, each containing a spray system with a pump and piping. The biological purification section includes an exhaust gas duct, a biologically active packing layer, a temperature and humidity sensor, a carbon source inlet, a spray system, and an exhaust gas outlet. The pretreatment and biological purification sections efficiently remove inorganic and organic components from high-concentration, irritating, and harmful gases generated in the livestock and poultry farming industry, achieving compliant emissions after deodorization. In use, this invention simplifies large-scale biological deodorization and purification equipment combined with a scrubbing system, solving the problems of excessive floor space and cumbersome installation of the original system, and achieving the removal of complex malodorous gas components.

According to the technical scheme, the floating type biological purification device is characterized by comprising a floating island and a plurality of sets of purification boxes, the purification boxes are detachably installed on the floating island, two sets of handles are symmetrically arranged on the floating island along the center of the floating island, each handle is provided with a control assembly, and the purification boxes and the control assemblies are arranged in a linkage mode; the control assembly comprises a control handle and a linkage rod, the control handle is rotationally connected to the handle, the linkage rod is installed at the upper end of the purification box, the floating island is provided with a linkage hole allowing the linkage rod to penetrate upwards, and the linkage rod is provided with a linkage groove allowing the control handle to be inserted therein. And various purification effects are achieved flexibly.

The invention discloses a river channel water body transparency improving system based on multi-stage filtration, and the river channel water body transparency improving system based on multi-stage filtration comprises a barrier region, a settlement region and an algae removal region which are sequentially arranged from front to back along a water body flowing direction, the filter floating island is positioned above the filter dam, and consists of a floating island and a filter screen arranged below the floating island; a base of the settlement area is concave; aquatic plants are planted in the algae removal area; according to the river channel water body transparency improving system based on multi-stage filtration, physical interception of pollutants can be achieved through the barrier area, particulate matter can be settled through the settling area, then filtration and biological purification are conducted through the algae removal area, and the purposes of efficiently removing the pollutants and improving the water body transparency are achieved; in addition, compared with a traditional purification method, the method has lower operation and maintenance cost.

The utility model relates to the technical field of wastewater treatment, in particular to a feeding mechanism and a wastewater treatment device. Comprising a power unit comprising a top plate; the stirring unit comprises a stirring column arranged in the top plate, a second feeding guide pipe arranged in the stirring column, a stirring part arranged on the outer side of the stirring column, a rotating bin arranged on the second feeding guide pipe and a rotating ring arranged on the rotating bin; the feeding unit comprises a discharging guide pipe arranged on the rotating ring, a storage box arranged at one end of the discharging guide pipe and a first feeding guide pipe arranged at one end of the storage box. By means of the stirring unit and the feeding unit, agents or bacteria needing to be added directly and evenly enter the wastewater and are mixed with the wastewater, and the problem that when chemical agents or anaerobic organisms are added through a feeding mechanism for biological purification, the chemical agents or the anaerobic organisms can only be added from the surface of the wastewater, and consequently the wastewater on the bottom layer cannot be purified is solved.

The utility model discloses a four-pond three-dam type ecological system for aquaculture tail water treatment, which comprises a settling pond, an aeration pond, a biological purification pond and a clean water pond, and an ecological filter dam is arranged between two adjacent ponds. The four-pond three-dam type ecological system adopts a four-pond three-dam structure, and is additionally provided with the biological purification pond and the ecological filter dam; the treatment efficiency of nitrogen and phosphorus in the culture tail water is improved by utilizing a microporous structure of the carbon fiber ecological grass and a biological membrane formed on the carbon fiber ecological grass, and the treatment efficiency of total suspended solids, chemical oxygen demand and total nitrogen in the culture tail water is accelerated; according to the utility model, the flow path of the culture tail water in the sedimentation tank is S-shaped by utilizing the flow guide baffle, so that the flow path and the residence time of the culture tail water in the sedimentation tank are increased, and the sedimentation efficiency of suspended matters in the culture tail water is improved.

The invention provides a porous building block paver with a water purification multi-structure layer and a manufacturing method of the porous building block paver, in particular to the porous building block paver with the water purification multi-structure layer and the manufacturing method of the porous building block paver with the water purification multi-structure layer, which are characterized in that two or more porous layers are stacked in a building block; the device consists of an upper filter layer, a middle chemical purification layer and a lower biological purification layer.

An improved formulation may include an enhanced ability relative to its predicates to destroy toxic threats in the form of sporulated bacteria, bacteria protected by biofilms, planktonic bacteria, fungus, viruses, chemical weapons, toxic chemicals including Fentanyl, its analogs, and a whole host of toxic industrial chemicals. The formulation may include a three part product composed of a buffered detergent chemical system, a hydrogen peroxide chemical system and an accelerator system designed to deliver activated peroxygen species when blended together.

The invention relates to the technical field of fresh and alive short-time culture devices, and particularly discloses a fresh and alive temporary culture integrated device which comprises a temporary culture pond, a first filter pond, a second filter pond and a nitrification pond which are integrated on the same base, and water in the temporary culture pond enters the first filter pond through primary filter holes and is lifted to a flow dividing pipe at the top of the second filter pond through a water pump; the water flows through a detachable nitrification filter bag to be subjected to preliminary filtration and nitrification treatment; then the water body enters the bottom of the nitrification tank through the first overflow pipe, is subjected to deep biological purification through the biological carrier filler, and finally flows back to the temporary culture tank through the second overflow pipe to form closed-loop circulation. According to the device, harmful substances such as ammonia nitrogen are efficiently degraded through multi-stage physical and biological synergistic purification, and a conical bottom pollution discharge and directional oxygenation structure is combined, so that the water quality stability is remarkably improved, the water changing frequency and the maintenance cost are greatly reduced, and a stable and healthy temporary culture environment is provided for fresh and alive fresh food.