42results about How to "High oxygen mass transfer efficiency" patented technology

A starting and running method of a completely autotrophic ammonium removal over nitrite technology belongs to the water environment recovery and regeneration fields. The starting and efficient and stable running method of the completely autotrophic ammonium removal over nitrite (CANON) technology in a biofilter reactor at normal temperature comprises the following steps: inoculating sludge, carrying out filter material film forming under an anaerobic and anoxic condition, starting CANON under an oxygen limited condition, and controlling the hydraulic retention time and the aeration rate in a combined mode to realize the high-load stable running. The CANON technology is started within 61d, the total nitrogen removal load in the 42d running after starting reaches 3.52kg.m<-3>.d<-1>, and the load is an extremely high level in the research field of the CANON technology, so the method has a simple operation, is easy to implement, and can realize the effective and rapid starting and the high-load running of the CANON technology.

The invention discloses a rotary type hollow fiber porous membrane foamless oxygen charging device and method. The device comprises a rotary foamless membrane type oxygen charging assemble, an air supplying and exhausting system, a water supplying and draining system and a motor and electrical control system. In the method, the raw water is added in an activated sludge aeration basin, the rotary foamless membrane type oxygen charging assemble rotates in the aeration basin at the speed of several to tens revolutions per minute, the oxygen charging adopts the intermittent air charging and discharging way, the air feeding pressure is controlled under the bubble point of the fiber membrane, the oxygen is dissolved rapidly on the membrane surface and is dispersed into the sludge water under the drive of the concentration difference and the pressure difference, the dissolved oxygen concentration is kept at 1 to 2.5 mg / l, the rotary oxygen charging assemble play the role of the mixing and activated sludge stirring. Compared with the traditional aeration method, the invention has high oxygen transmissibility, good oxygen charging effect, little oxygen charging amount, lower energy consumption, little membrane pollution, and convenient change and maintenance, and is very suitable for the upgrading and reforming of the activated sludge aeration basin in the sewage treatment technology.

The invention relates to a water purification and aeration method and equipment for a closed recirculating aquaculture system, in particular to a method and equipment for realizing double-effect functions of water purification and aeration with an organic hollow fiber microporous membrane material as a core component. Filtration of suspended solids and organic macromolecular impurities is combined on the basis of water aeration by use of a membrane technology. Multiple steps of operation in recirculating aquaculture is integrated in a single system, the equipment occupied space is effectively reduced, and the pipeline connection is simplified; management of the whole recirculating aquaculture system is facilitated, and the operation efficiency is improved.

The invention discloses an air diffusion aerator. The air diffusion aerator comprises an air inlet pipe and an inverted umbrella cap, wherein the upper end of the air inlet pipe is connected with the lower end of the inverted umbrella cap through a perforated pipe; four walls of the perforated pipe are provided with a plurality of micro-pores passing through the pipe wall of the perforated pipe; the pipe wall of the perforated pipe on which the micro-pores are formed is provided with extension conduits with the same or different extension lengths; and at least two layers of conical teeth are distributed on the outside cap wall of the inverted umbrella cap. Since the technical scheme is adopted, air current enters a medium from the micro-pores of the perforated pipe after entering the perforated pipe. The air diffusion aerator has the advantages of simple structure, fine air bubbles entering the medium, uniform distribution and high oxygen mass transfer efficiency.

The invention discloses a black and odorous water body treatment and restoration system. The system has the advantages of low investment cost, favorable nitrogen / phosphorus removal effect, stable operation and the like, and is convenient for installation. The system comprises a biochemical in-situ reinforced treatment region and an aquatic plant restoration region, wherein the biochemical in-situ reinforced treatment region is an integrated water body in-situ restoration facility, and is mainly composed of a main body frame, an aerator, a cofferdam, a drawer-type filler unit, a floating-type biological filler, an aeration main pipe, a fan, a fan hood, a floater and a fan support; the aquatic plant restoration region is an ecological floating island restoration system and is composed of a planting net and aquatic plants; the aquatic plant restoration region is distributed around the biochemical in-situ reinforced treatment region; the cofferdam of the biochemical in-situ reinforcement treatment region divides the biochemical in-situ reinforced treatment region and aquatic plant restoration region into two independent regions; and water purified by the biochemical in-situ reinforced treatment region flows to the surrounding aquatic plant restoration region from the upper edge of the cofferdam.

The invention discloses a deep-well aerobic digestive treatment device and a treating method for organic sludge. The device comprises a reactor main body and a top box, wherein air inlets of intake pipes for aeration and circulation both are connected to an air compressor; a sludge outlet of a sludge inlet pipe is located at the axial middle part of the reactor main body; an air outlet of the intake pipe for aeration is lower than the sludge outlet of the sludge inlet pipe; a sludge inlet of a sludge outlet pipe is located at the internal bottom of the reactor main body and located under an aeration device; the upper port of an inner barrel in the reactor main body is located in the top box and the bottom port of the inner barrel is located between the sludge outlet of the sludge inlet pipe and the air outlets of the intake pipes; the sludge inlet pipe and the intake pipe for aeration is located outside the inner barrel; the sludge outlet pipe and the intake pipe for circulation are located in the inner barrel; an exhaust device is arranged at the top of the top box; the sludge outlet pipe extends upwards out of the top box and the sludge outlet of the sludge outlet pipe is communicated with a flocculation floatation tank; and a vacuumizing device is arranged on the sludge outlet pipe between the top box and the flocculation floatation tank. The deep-well aerobic digestive treatment device is high in organic matter degradation and removal speed, few in volatile solids in treated sludge, low in aeration amount and energy consumption; and multiple purposes of the air are realized, so that the cost is saved.

The invention relates to sewage treatment equipment based on in-situ control of biofilm thickness, and a control method of the sewage treatment equipment. The equipment comprises a water inlet tank, a water feed pump, a reactor and a water outlet valve which are sequentially connected, wherein a non-foam aeration membrane is arranged in the reactor; the equipment further comprises a gas pressure regulating valve for adjusting the oxygen partial pressure and the dissolved oxygen concentration in the membrane; one end of the gas pressure regulating valve is connected with an air compressor, and the other end of the gas pressure regulating valve is connected with the non-foam aeration membrane by means of an intake pipe assembly; after sludge is inoculated into the reactor, the pH value of wastewater is adjusted in advance, and the wastewater containing high ammonia nitrogen enters the reactor; by adjusting the oxygen partial pressure and dissolved oxygen concentration in the membrane of the reactor, a oxygen-contaminated substrate is diffused and transmitted in the opposite direction in the biofilm after the biofilm is formed on the surface of the non-foam aeration membrane, and nitrification and denitrification are carried out synchronously. Compared with the prior art, the sewage treatment equipment reduces the demand of an electronic donor, the membrane device occupies a small area, the cost of sewage treatment is lowered, and low-carbon sewage treatment is realized.

The invention provides a water purification system, belonging to the field of water treatment. The water purification system comprises an oxygenation device and a microbial carrier device, wherein the oxygenation device comprises an air compressor, a magnetic assisted cyclone gas dispersion pipe and a gas inlet pipe connected between the air compressor and magnetic assisted cyclone gas dispersion pipe; the microbial carrier device comprises a floating barrel, a basalt fiber carrier and a concrete precast block; the upper and lower ends of the basalt fiber carrier are respectively connected with a floating ball and the concrete precast block; and the basalt fiber carrier is suspended in water. Sewage forms abundant gas bubble flow after passing through the magnetic assisted cyclone gas dispersion pipe, and submarine aboriginal microbes are attached to the basalt fiber carrier and perform massive reproduction. The water purification system can increase the dissolved oxygen concentration in the water body and the aboriginal microbial biomass in water. The microbubbles are utilized to oxidize the sediment and reduce the endogenous pollution, and the microbes on the carrier are utilized to degrade the pollutants in the water body, thereby implementing efficient and quick purification of the pollutants in the closed water body.

The invention belongs to the technical field of sewage treatment and particularly relates to a sleeve type microbial fuel cell for synchronous short-cut nitrification and biological denitrification and a method thereof. The internal and external sleeve type microbial fuel cell is adopted, short-cut nitrification and biological denitrification can be performed and are combined with a membrane aeration biological membrane technology and a biological cathode process; during a nitration stage, by controlling process conditions such as intramembrane oxygen partial pressure, inflow pH, dissolved oxygen concentration, inflow ammonia concentration and reaction temperature, oxidation of ammonia is controlled at a nitrosation stage and then nitrogen removal by denitrification is performed. While biological resources in sewage can be utilized to generate electric energy, not only are carbon-containing organic compounds in sewage removed efficiently, but also nitration reaction and denitrification reaction are performed synchronously, and an effect of improving total nitrogen removal rate and ammonia removal rate is achieved. Through the method, the total nitrogen removal rate and the COD removal rate of wastewater are very remarkable.

The invention relates to a device and a method for treating urban sewage by a reverse air flow continuous water inlet three-circulation reactor. The device comprises an urban domestic sewage tank, a reverse air flow continuous water inlet three-circulation aeration tank and a vertical flow type precipitation tank in sequential arrangement, wherein a top water outlet of the domestic sewage tank communicates with a water inlet formed in the top of one side of the reverse air flow continuous water inlet three-circulation aeration tank through a water pipe; a water feed pump is arranged on the water pipe; a water outlet formed in the bottom of the other side of the reverse air flow continuous water inlet three-circulation aeration tank communicates with a water inlet formed in the top of the vertical flow type precipitation tank; one row of aeration pipes is arranged at one side of the inner bottom of the reverse air flow continuous water inlet three-circulation aeration tank. The reactor provided by the invention has the advantages that the organic matter and nitrogen mass transfer speed in the sewage is accelerated; the carbon source can be continuously supplemented so as to ensure the normal proceeding of denitrification. Compared with that of a conventional aeration tank, the denitrification rate is improved by about 30 percent.

Belonging to the field of sewage denitrification treatment, the invention discloses a membrane aerated biofilm micro-aerobic sludge bed process and a wastewater treatment method thereof. The membraneaerated biofilm micro-aerobic sludge bed process adopts a biofilm micro-aerobic sludge bed, a sludge bed water inlet pipe, a sludge bed water outlet pipe, a sludge discharge pipe, a biofilm aeration component, an air pump, a circulating pump, a peristaltic pump, air flow meters and pressure gauges. The treatment method realizes the mutualism and collaborative metabolism of aerobic bacteria, anaerobic bacteria and facultative anaerobes in a micro-aerobic environment, at the same time utilizes the efficient oxygen mass transfer efficiency of the membrane aeration component and enables wastewaterto flow on the outer surface of the biofilm to form back diffusion of oxygen and pollutants, and can realize effective removal of pollutants in a bioreactor. The process and the treatment method provided by the invention are suitable for denitrification treatment of urban sewage and industrial wastewater, and have the advantages of high treatment efficiency, high energy utilization rate, stable effluent effect, fast start-up speed, etc.

The invention discloses a method for rapidly preparing aerobic granular sludge. The method comprises the following operation steps: (1) extracting sludge with relatively high biological activity; (2)carrying out ultrasonic pretreatment on the sludge; (3) adding a flocculating agent into the sludge, wherein the adding amount of the flocculating agent is 0.15-0.3% of the mass of dry solids of the sludge; (4) adding lignocellulose into the sludge, wherein the adding amount of lignocellulose is 5-15% of the mass of the sludge dry solids; (5) adding microbial exopolysaccharides into the sludge, wherein the addition amount of the microbial exopolysaccharides is 0.15-0.3% of the mass of dry solids of the sludge; and (6) carrying out centrifugal dehydration and granulation on the sludge to obtainthe aerobic granular sludge. The obtained aerobic granular sludge is put into an aeration tank to serve as a nuclear substance for inoculating the granular sludge, the culture period is short, the system is stable, and rapid utilization and engineering practice can be achieved. Compared with traditional activated sludge, the prepared activated sludge is good in settling performance and short in settling time, meanwhile, the added chemical agents cannot influence the activity of microorganisms in the sludge, and the efficiency of a wastewater treatment system is improved.

The invention discloses a material pretreatment device for aerobic composting and biological drying of solid waste and a material pretreatment method, relates to a material pretreatment device and method and aims to solve the problems that a large quantity of conditioners are required to be added due to non-uniform mixing of materials in the conventional composting and biological drying pretreatment process. The device comprises a press machine, a pulverizer and a stirring machine. The method comprises steps as follows: 1), organic solid waste with the water content smaller than or equal to 70% is smashed after biological drying or aerobic composting, and a material II is obtained and is put in the stirring machine; 2), the organic solid waste with the water content larger than or equal to 50% is put in the press machine to be pressed to form a material I; 3), the material I is added to the material II at a constant speed, the mixture is stirred and mixed, and a mixed material III with the water content lower than 70% is formed; 4), the mixed material III is directly subjected to follow-up biological drying or aerobic composting treatment. According to the method, a conditioner is not required to be added, and the aerobic composting and biological drying time can be shortened. The material pretreatment device and method are used for treating the solid waste.

The invention discloses a multichannel combined aeration tower which is particularly applicable to an underground water iron and manganese removal process and solves the problems of low oxygen dissolving efficiency, low effluent DO (dissolved oxygen) concentration, large occupied area and high energy consumption of an existing aeration device. The multichannel combined aeration tower comprises a water inlet pipe, a water distribution device, a tower body, a packing group, air pipes, blast aeration devices and a water outlet pipe, a water outlet of the water distribution device is formed in the top of the tower body, a water inlet of the water distribution device is connected with the water inlet pipe, the packing group is arranged inside the tower body, the blast aeration devices are symmetrically arranged on the lower portion of the tower body and connected onto the outer wall of the tower body through the air pipes, the water outlet pipe is arranged at the bottom center of the tower body, and the bottom of the tower body is inclined downwards from the periphery to the center. The multichannel combined aeration tower is used for secondary aeration in a secondary filtering oxidation process with iron and manganese coexistence.

The invention discloses an efficient denitrification treatment method for kitchen wastewater. The method comprises the following steps: 1, pretreating the kitchen wastewater; 2, inputting the kitchenwastewater into a first-stage anoxic tank, and mixing the kitchen wastewater with sludge returned by a membrane tank and a mixed solution returned by a first-stage aerobic tank for denitrification reaction; 3, enabling the kitchen wastewater to enter the first-stage aerobic tank, conducting aeration to remove most of organic matter, and achieving a nitration reaction 4, enabling the kitchen wastewater to enter the next-stage anoxic tank, and continuously performing denitrification reaction on the residual nitrate nitrogen; 5, repeatedly executing the step 2 to the step 4, so as to enable the kitchen wastewater to be treated by the multiple stages of anoxic tank treatment and corresponding aerobic tank treatment; 6, enabling the kitchen wastewater to enter the membrane tank, and further degrading residual organic matter; and 7, putting the kitchen wastewater treated by the membrane tank into a clean water pool. The application of the invention can fully ensure the stable operation, highefficiency and reliability of the kitchen wastewater denitrification treatment process.

The invention relates to a bi-directional ventilation superficial-layer static composting device and a method for composting by utilizing the same, and relates to a composting device and a method for composting by utilizing the same, aiming at solving the problems of the traditional composting technology that the land occupation area is large, the composting period is long, the odor caused by mechanical pile turning is large and the dosage of a regulation agent is large. The bi-directional ventilation superficial-layer static composting device comprises a fermentation cabin, a fermentation trough, a fermentation cabin top cover, an upper gas inlet-outlet pipe, a middle gas inlet-outlet pipe, a lower gas inlet-outlet pipe, an upper-lower ventilation fan, a middle ventilation fan, a bottom gas inlet-outlet valve, a top gas inlet-outlet valve, a middle gas inlet-outlet valve, a top exhaustion valve and a bottom exhaustion valve. The method comprises the following steps: I, mixing waste and compost to obtain a mixture I, and laying the mixture I in the fermentation trough; II, gradually fixing the fermentation trough in the fermentation cabin layer by layer, and loading the top cover on the fermentation cabin; III, changing the ventilation direction by opening and closing corresponding valves; and IV, after the fermentation, taking out the fermentation trough, mixing one part of fermented material and waste to obtain a mixture II which is used for the next composting fermentation, and taking the other part of the fermented material as a product to be sold. The bi-directional ventilation superficial-layer static composting device and the method are applied to the field of composting fermentation.

The invention discloses an aerobe degumming reaction system for hemp fibers, and relates to the technical field of hemp fiber degumming. The aerobe degumming reaction system comprises an efficient aerobe fluidized bed reactor, a middle buffering pool, a hemp fiber aerobe degumming tank and a control system. One side of the lower portion of the efficient aerobe fluidized bed reactor is provided with a first feeding pipe and an aeration pipe, the other side of the lower portion of the efficient aerobe fluidized bed reactor is provided with a second feeding pipe, the middle of the efficient aerobe fluidized bed reactor is provided with a reaction area, the upper portion of the reaction area is provided with a mud pipe, and the top of the reaction area is provided with a third water outlet; the middle buffering pool comprises a water inlet and a mud outlet; the hemp fiber aerobe degumming tank is provided with a water distribution area and a degumming area from bottom to top in sequence, wherein the water distribution area is provided with a water inlet pipe, an air inlet pipe and a microporous aeration disc, one side of the upper portion of the degumming area is provided with a firstwater outlet, and the other side of the upper portion of the degumming area is provided with a second water outlet; besides, the hemp fiber aerobe degumming tank is provided with a heat preservation layer, a hot water inlet and a hot water outlet. The system is easy to operate and control, microbe degumming for the hemp fibers is achieved, the problem that degumming wastewater is hard to treat isalso solved, and the system achieves nearly zero discharge, is environmentally friendly, and has a good application prospect.

The invention relates to a biological device for treating municipal sewage and a treatment method of the biological device. The biological device comprises a first SBR (Sequencing Batch Reactor), a middle water tank, a second SBR, a restrain reactor and a self-control cabinet, wherein the first SBR, the middle water tank and the second SBR are connected in sequence; the self-control cabinet is electrically connected with the first SBR, the middle water tank, the second SBR and the restrain reactor respectively; municipal sewage is connected with a water inlet pipe of the first SBR through a first water inlet pump. The biological device disclosed by the invention has the advantages that the structure is simple, the design is reasonable, effluent quality reaches the standard, the operation is simple, manual operation errors can be effectively reduced, the time utilization rate is high, the maintenance cost is low, and the like.

The invention discloses an advanced treatment system and method for textile printing and dyeing sewage. The treatment system comprises a pretreatment tank, a hydrolysis acidification tank, an anaerobic-anoxic-aerobic tank, an MBR membrane tank, an ozone contact oxidation tank and a biological filter tank which are sequentially connected through pipelines; the pretreatment tank is connected with awater inlet pipe; the ozone contact oxidation tank is connected with an O3-oxygen-enriched air mixed gas generation device; a tail gas recycling device connected through a pipeline is arranged betweenan aerobic tank in the anaerobic-anoxic-aerobic tank and the ozone contact oxidation tank; the biological filter tank is connected with a drain pipe. The treatment method comprises the following operations: pretreatment, hydrolytic acidification, anaerobic treatment-anoxic treatment-aerobic treatment, MBR membrane enhanced biochemical treatment and filtration, contact oxidation and biological filtration. The advanced treatment system and method for the textile printing and dyeing sewage are good in COD removal effect and low in treatment cost, and treated water can be directly discharged or recycled as reclaimed water.

The invention provides a tubular aeration tank type high-temperature aerobic composting system. The system comprises a fermentation tank and air pipes located at the bottom of the fermentation tank, the air pipes are connected with a tubular micro-hole aerator, and a grating plate covers the upper surface of the tubular micro-hole aerator; water permeable bricks are arranged under the air pipes and the tubular micro-hole aerator, water collection tanks are formed under the water permeable bricks, a turning machine used for uniformly mixing materials in the fermentation tank is arranged on thefermentation tank, and the air pipes are connected with an aeration fan and output oxygen to the tubular micro-hole aerator through the aeration fan. According to the system, the adopted tubular micro-hole aerator can make gas uniformly distributed and improve the oxygen mass transfer efficiency and the fermentation efficiency, through the water permeable bricks and the water collection tanks, moisture in the materials and moisture generated from fermentation can be collected and treated uniformly, and secondary pollution is avoided.

The invention discloses a membrane electrode with an efficient proton transport network. The membrane electrode comprises an anode catalyst layer, a proton exchange membrane and a cathode catalyst layer; sulfonated carbon nanofibers are arranged in the cathode catalyst layer, the mass ratio of the sulfonated carbon nanofibers to a platinum-carbon catalyst is (0.1-0.4): 1, and protons are transmitted in the sulfonated carbon nanofibers. The carbon nanofibers are subjected to sulfonyl modification, so that the carbon nanofibers have a proton conduction function; and the modified nanofibers have hydrophilicity and are easy to adsorb ion resin, so that the ion resin is distributed along the fibers, the orderliness of the ion resin is enhanced, and the proton mass transfer efficiency is improved.

The invention discloses a two-stage mixing jet aeration treatment system. The problems that most existing biochemical aerobic tanks adopt a microporous aeration mode for aeration and oxygenation, themicro-pore aeration air demand is large, the power energy consumption is large, blockage is easily caused, frequent replacement and detection are needed, and much inconvenience is brought to stable operation of the system are solved. The system comprises a jet device main body, a hydraulic mixing injection pipe, a guide cylinder, a conical reflection cap and a base plate. A jetted gas-water mixedliquid is upward along the flow guide cylinder until the mixed liquid is sprayed out of the water level, and the mixed liquid impacts the conical reflection cap, and is uniformly dispersed towards theperiphery of the reflection cap, which is equivalent to the effect of surface aeration, so that the oxygen mass transfer efficiency and rate are further improved; the liquid returning to water body forms a circulating flow on the inner side and the outer side of the flow guide cylinder, so the stirring effect in a tank body is promoted; and the system has the characteristics of small occupied area, simple structure, convenience in installation and maintenance, uniform mixing, uniform oxygen distribution, low energy consumption and the like.

Belonging to the field of industrial wastewater treatment, the invention relates to aerobic biological filler and an arrangement method thereof. The filler is prepared from a polyethylene-chitosan derivative. One filler composition comprises a hollow circular pipe and a concentric solid cylinder, the hollow circular pipe and the concentric solid cylinder are connected through three supports at an angle of 120 degrees to each other, and another filler composition comprises a hollow ball with round holes at two ends, and both ends of the round holes are symmetric about the ball center. The filler provided by the invention is made of the degradable polyethylene-chitosan derivative, and can be degraded into environment-friendly substances. The layout has relatively fixed location, can avoid biological filler stacking phenomenon, and can better give play to the effect of the biological filler. During aeration, microorganisms on the filler and pollutants and oxygen in water can undergo mass transfer, thus greatly improving the mass transfer efficiency. The biological filler is evenly dispersed in an aeration tank, and the oxygen mass transfer efficiency is high, so that the aeration quantity is greatly reduced, and the energy consumption and running cost are reduced.

The invention relates to the technical field of sewage treatment, in particular to a sewage biochemical treatment device, which comprises a sewage tank; a blocking member which is installed in the sewage pool and divides the sewage pool into a main aeration area, a gas stripping / membrane water outlet area and an auxiliary aeration area which are communicated in sequence, wherein a sewage inlet isformed in the main aeration area, and sewage circularly flows in the sewage pool by the sequence of the main aeration area, the gas stripping / membrane water outlet area, the auxiliary aeration area and the main aeration area; a membrane filtration assembly, which is arranged in the gas stripping / membrane water outlet area and used for filtering activated sludge to separate mud from water, and a water outlet of the membrane filtration assembly is a purified water outlet; and a gas stripping device which is arranged in the sewage pool and is used for providing power for the circular flow of thesewage. The biochemical reaction tank is combined with a membrane filtration water outlet technology, so that the problems of large occupied area and easiness in mud leakage of a clarification area are effectively solved.

The invention discloses sewage treatment equipment combining micro-nano bubbles and a membrane bioreactor, and belongs to the technical field of sewage treatment equipment. The equipment comprises anadjusting tank, an integrated sewage treatment device, a disinfection unit, a micro-nano bubble generator and a micro-nano bubble aerator, and the integrated sewage treatment device is sequentially provided with an anoxic zone, a first aerobic zone, a second aerobic zone and an MBR zone in the sewage treatment flow direction. The micro-nano bubble aerator is arranged at the bottoms of the first aerobic zone and the second aerobic zone, and the micro-nano bubbles are combined with the membrane bioreactor, so the treatment performance of the integrated sewage treatment device is improved, the hydraulic retention time is shortened, the occupied area is saved, the process is a low-energy-consumption and high-efficiency village and town domestic sewage treatment process, the removal rate of indexes such as nitrogen, phosphorus and the like can be improved, the biodegradability of the sewage can be improved, the decomposition capability of refractory pollutants is improved, and up-to-standard discharge of the sewage is ensured.

The invention belongs to the field of artificial wetland, and relates to a composite horizontal subsurface flow constructed wetland device. The device comprises a buffering selecting water distribution area, a water level variable treatment area, a biological trickling filter area and a water outlet area. The buffering selecting water distribution area comprises a water distribution area front baffle, a water distribution area rear baffle, a water distribution area left baffle, a water distribution area water distribution plate, a water distribution area bottom plate and a water inlet pipe; the water level variable treatment area comprises a treatment area front baffle, a treatment area rear baffle, a treatment area right baffle, a treatment area bottom plate, a siphon outer sleeve and a siphon inner water outlet pipe; the biological trickling filter area comprises a trickling filter area front baffle, a trickling filter area rear baffle, a trickling filter area left baffle, a trickling filter area right baffle, a trickling filter area lower water distribution plate, a trickling filter area upper water distribution plate and a trickling filter area vent hole; and the water outlet area comprises a water outlet area front baffle, a water outlet area rear baffle, a water outlet area left baffle, a water outlet area right baffle, an inclined bottom plate, a water outlet pipe and awater outlet area vent hole. The constructed wetland provided by the invention can improve the degradation efficiency of organic pollutants and nitrification efficiency of nitrogen.

The invention relates to a system and a method for in-situ biological nest micro-nano-aeration water purification. The interior of a box body is divided into a water distribution area, a bubble generation area, a filler area and an amplification area from bottom to top, a plurality of holes are formed in the side wall of the water distribution area to introduce sewage and air, and a submersible pump is arranged in the water distribution area; a micro-nano-bubble generating device is of a symmetrical structure formed by combining two hemispherical containers and a cylindrical container, two ends of each hemispherical container are each provided with a circular hole used for spraying out micro-nano-bubbles, the cylindrical container is provided with a water inlet pipe connected with the submersible pump, two hollow C-shaped pipes which are sequentially arranged are arranged on the inner surface of the cylindrical container to divide the connecting part of a water inlet pipe or a water outlet pipe of a previous C-shaped pipe and the cylindrical container into two parts, and the cross section area of each part is smaller than that of an outlet part of the water inlet pipe or the C-shaped pipe; the filler area comprises at least two layers of filler areas; a plurality of water outlets are formed in the side wall of the amplification area; and the system further comprises a power device.

The invention relates to the technical field of sewage biochemical treatment, in particular to a blanket type aeration device which comprises air inlet distributors, a distributor support, an aeration pipe and an aeration pipe support, one end of each air inlet distributor is connected with an air inlet device, the other end of each air inlet distributor is provided with an air outlet, and the multiple air inlet distributors are installed on one side of the air inlet distributor support side by side. One end of each aeration pipe is fixedly connected with the air outlet, the other end of each aeration pipe is sealed, the aeration pipes are arranged on the aeration pipe support side by side in a penetrating mode, and a plurality of evenly-arranged aeration holes are formed in the aeration pipes. According to the invention, concentrated and dense aeration can be generated in a water body, so that the water body is subjected to all-directional and dead-angle-free aeration, the oxygen mass transfer efficiency is improved, the aeration blind area is reduced, and the water body mixing effect is comprehensively and effectively improved, so that the floc state of microorganisms in the water body is improved.