355results about How to "Prevent eutrophication" patented technology

The invention discloses a device for autotrophic nitrogen removal by combining A / O shortcut nitrification of sludge digestion liquid and anaerobic ammonium oxidation of granular sludge and a method thereof. The device of the invention comprises a digestion liquid tank, an A / O shortcut nitrification tank, a sedimentation tank, a middle water tank, an anaerobic ammonium oxidation tank, wherein, the digestion liquid tank is communicated with a first cancellus as an anoxic zone of the A / O shortcut nitrification tank by the inlet pump of the A / O shortcut nitrification tank; the sedimentation tank the upper part of which is communicated with the middle water tank by a water pipe is provided with a central pipe and the anaerobic ammonium oxidation tank is provided with a water bath sleeve and a granular sludge bed. In addition, the method of the invention comprises the following steps of starting the A / O shortcut nitrification tank; starting the anaerobic ammonium oxidation tank of the granular sludge; operating an autotrophic biological nitrogen removal system in series after the starting of the A / O shortcut nitrification tank and the anaerobic ammonium oxidation tank is respectively completed. The device and the method of the invention are applicable to the shortcut nitrification and the nitrogen removal of the sludge digestion liquid in a sewage treatment plant and have the advantages of advanced technology, simple structure of the device, convenient operation and good treatment effect of water purification.

The invention relates to environment-friendly type river and lake controlling and cleaning equipment. The environment-friendly type river and lake controlling and cleaning equipment comprises a boat body, power devices, a storage slot, a compression device, movable gripping devices, cut-off devices, a salvaging device and a conveying device, wherein the power devices are symmetrically mounted at the left side and the right side behind the boat body separately along the longitudinal central axis of the boat body; the compression device is positioned above the storage slot; the movable gripping devices are separately positioned at the left side and the right side of the compression device; the cut-off devices are positioned at the outer sides of the movable gripping devices; the salvaging device is positioned in front of the boat body; and the conveying device is positioned between the salvaging device and the storage slot. The environment-friendly type river and lake controlling and cleaning equipment integrates the functions of floating force adjusting, water-surface travelling, waste compacting, aquatic plant gripping, garbage salvaging, garbage conveying and the like, realizes the functions of eliminating aquatic plants in rivers and lakes as well as floating waste on the water surface, achieves the effect of dredging the rivers and the lakes, keeps water in the rivers and the lakes clean, is high in integral mechanical degree, is complete in function and is high in operating efficiency.

This invention belongs to new style green technology region, concretely relates to a method of using sludge organic matter to advance biologic dephosphorization effect of sewage. Excess sludge at basicity condition is carried out anaerobic fermentation to produce organic acid; adopt guano precipitation means to reclaim nitrogen and phosphorus of organic acid; add the treatment fluid after reclaiming nitrogen and phosphorus to municipal sewage, under anaerobic-aerobic condition aerobic conditito carry out biological sewage treatment,through solid-liquid separation, the out water reaches the mark and is discharged. This invention through the method of adding excess sludge broth to sewage, not only advance the ability of microbe of synthesizing poly- hydroxy valeric acid(PHV)under anaerobic condition, advance availability of poly- hydroxy eicosanoic acid, decrease glycogen metabolization quantity, in favor of maintaining higher dephosphorization effect at aerobic condition, reduce phosphorus concentration in the out water, prevent water substance eutrophication occurring, but also decrease sludge volume, thereby decrease sludge treatment cost and pollute to environmental.

A inject gas control device that performs, for example, control reflecting variation in vessel velocity over time without adversely affecting the main engine is realized. That is, it is prevented that gas is drawn too much and thereby a gas supply or charged air rate becomes insufficient, efficiency of the main engine is decreased and exhaust gas is deteriorated, and analogous events occur because the gas supply or charged air rate is too much instead.There are provided a main engine 4010 acquiring propelling power for a vessel 1, and a turbocharger 4011 that is driven by exhaust gas from the main engine 4010 and blows pressurized gas to the main engine 4010. A part of the pressurized gas and / or exhaust gas is drawn from between the turbocharger 4011 and the main engine 4010 (5023, 5024 and 5025). The drawn pressurized gas and / or exhaust gas are injected in the proximity 9 of the hull on or below the waterline (5040), and the drawing rate of the pressurized gas and / or the exhaust gas is controlled on the basis of a physical quantity related to a heat load on the main engine 10 and characteristics of the turbocharger (4200).

The invention relates to a farmland nitrogen and phosphorous non-point source pollution control and recycle system, and a method thereof. The system comprises a water collector, an adsorption unit and a water store which are sequentially arranged from the upstream to the downstream according to farmland surface runoff and underground runoff paths. The water collector, the adsorption unit and the water store are sequentially transversely arranged according to the farmland surface runoff and underground runoff paths, so when rain falls or irrigation is carried out, the farmland water is surplus, meets in the water collector through the farmland surface runoff and underground runoff, the water in the collector continuously downward flows and goes through the adsorption unit, nitrogen (N) and phosphorous (P) are adsorbed, the purified farmland drainage enters the water store, and the superfluous purified drainage is discharged to a river and a lake; and when farmland recharging is carried out, the water which reversely flows goes through the adsorption unit for the N and P desorption, and the desorbed N and P enter the water collector with the water flow, afresh enter the farmland and are adsorbed and utilized by crops. Compared with the prior art, the method has the advantages of pollution control, recycle, fertilizing cost saving and the like.

The invention discloses a multi-step water body ecological purification system. The system comprises a concrete bed body, wherein the concrete bed body comprises three regions from top to bottom, respectively a floating bed region, a microorganism region and a sedimentation bed region; a ventilating pipe is arranged in the floating bed region; a vent and a windmill are arranged at the upper end of the ventilating pipe; the windmill is fixedly arranged below and close to the vent; an aeration opening and a stirrer are arranged at the lower end of the ventilating pipe; the stirrer is fixedly arranged above the aeration opening; the lower end of the ventilating pipe deeply extends into the microorganism region; a water inlet and a water outlet are respectively formed in the left and right sides of the concrete bed body; and detachable filter screens are respectively arranged at the water inlet and the water outlet. The invention also discloses a construction method of the multi-step water body ecological purification system. The multi-step water body ecological purification system disclosed by the invention is rapid in purification speed, good in purification effect, easy to maintain and manage and low in cost.

The invention relates to an advanced nitrogen and phosphorus removal device and a process control method thereof, belonging to the technical field of biological sewage treatment by using a biochemical method. Aiming at the defects that the existing A / O step feed technology can not synchronously have advanced biological phosphorus removal, reverse A / O technology is high in energy consumption and complicated in operation and the like, the invention combines the reverse A / O technology and the step feed technology, nitrification liquid internal reflux does not needed to be set, a first section is provided with an anaerobic reactor, anoxic reactors at a second section and a third section are respectively installed on an ORP on-line sensor and a nitrate on-line sensor, and data obtained by collecting ORP and nitrate in an on-line way can be taken as input of a process controller, is output by fuzzification treatment and can act on opening and closing a frequency converter of an actuating mechanism and an external carbon source dosing metering pump so as to save the external carbon dosage. The invention can greatly improve the denitrification effect of the step feed technology, utilizes carbon source of raw water to the utmost extent, realizes synchronous nitrogen and phosphorus removal, and has the advantages of simple control structure and stable quality of yielding water.

The invention relates to a sewage ecological water-purification system including a purifying box body; the purifying box body is internally provided with a plurality of purification carriers, and the purification carriers are porous materials and include the component of construction waste, wherein the construction waste has the particle size range of 1-80 mm and includes at least one of broken stone, block stone, angular gravel, round gravel and waste blocks; the purification carriers are attached with a biofilm prepared from a biological preparation, and the biological preparation is formed by composite culture of a plurality of active microorganisms. The system has the advantages of high purification efficiency, thorough purification, water quality improvement, low investment and operation costs, convenience in construction, good film-hanging effect, and no cause of secondary pollution to the environment.

The invention discloses an ecological floating bed suitable for a high-sediment large-flow rate water body. The ecological floating bed is formed by interconnecting two floating bed units, wherein each floating bed unit comprises floating bed fixing rods, hollow PVC tubes, wave eliminating rafts and a gauze; a plurality of hollow PVC tubes are horizontally arranged and fixed by the floating bed fixing rods so as to form a floating raft; the wave eliminating rafts are arranged below the two ends of the floating raft respectively; the gauze in which hollow columnar polyvinyl chloride short corrugated tube packing is packed is hung below the floating raft; and the gauze is positioned below the wave eliminating rafts. The ecological floating bed can treat the water body which contains high sediment and high phosphorus and nitrogen concentration, is suitable for a river with large flow rate, can build a landscape effect without influencing shipping, and can produce part of economic benefits.

The invention relates to a phosphorus-free corrosion-inhibition antiscalant used for industrial circulation cooling water treatment, which is characterized by comprising the following medicament components by weight: 10-40% of N-alkyl group-N-fat acyl amino fatty acid salt, 5-25% of hydroxy carboxylate, 5-20% of carboxylic acid copolymer, 1-4% of metal salt and the balance water.

The invention provides a submerged plant modularized growth bed and a method for recovering growth of underwater submerged plants. The submerged plant modularized growth bed comprises suspended solids, planting layers, plant layers, a growth substrate layer, a bearing layer and balance weight facilities, the submerged plant modularized growth beds are mutually connected to form an entire piece, micropores are formed in the bearing layer so that roots of the plants can penetrate through, the growth substrate layer adopts planting soil, the periphery of the planting layer is fixedly connected with the periphery of the bearing layer, the planting layers and the bearing layer wrap the growth substrate layer, the suspended solids are fixedly arranged around the submerged plant modularized growth bed, each suspended solid is hollow and is filled with air, and the balance weights are fixedly arranged at the lower end portion of the suspended solids to keep the depth of the modularized growth bed suspending on the water surface. The submerged plant modularized growth bed is reasonable in design, compact in structure, simple to manufacture, low in cost, simple to operate and convenient to manage, and the submerged plant modularized growth bed is degraded along with the growth of the underwater submerged plants, is free of pollution, protects the environment, is wide in application range, is widely popularized conveniently, and is favorable for recovery of the underwater submerged plants in different water areas.

The invention discloses an ascending and descending dual-buoyancy regulation sinking bed-floating bed water quality purification device. A sinking bed system is provided with a hollow sinking bed water level regulating framework; a circle of hollow outer rectangular framework is tightly fixed on the periphery of an upper rectangular frame of the sinking bed water level regulating framework; water is injected into the sinking bed water level regulating framework and the outer rectangular framework, so that the sinking bed system reaches a fixed planting water level or a growth water level. The device is characterized in that a floating bed system providing region is added to the periphery of a sinking bed; the system balance is controlled through the peripheral single floating bed system; the bed body stability is enhanced, so that the influence of environment factors on the sinking bed and a floating bed is reduced. The water level of water sinking plants in the water is regulated through the water irrigation and water pumping effect inside the sinking bed and the effect of a regulating rope; by controlling the growth position of the water sinking plants in the water, the most proper growth water level of the water sinking plants in the water can be realized; the natural environments are simulated to the maximum degree. The water sinking plants and water emerging plants are combined; the water body ecological system recovery can be facilitated to the maximum degree.

The invention discloses a preparing and purifying method of dealing modularization air-float artificial mattress of wastewater, wherein the main frame of bed display member frame structure as cube box; the bottom, angle and side wall connected with pipes; the top open up to the air; the grid plate is set on the bottom of the bed; the planting box is set on the grid plate; planting vegetation through the planting hole; setting several floats on the side wall; counteracting the weigh of bed body with floatage; keeping balance of bed body in the water; installing ports for passing water on the bottom of float bowl with at least 2 float bowl on the holder; inserting gas-filled lamp into float bowl through ports for passing water; equipping inflating gate valve on the other side of gas-filled lamp. The invention possesses rational structure and simply production, which can improve the survival rate of water plant.

The invention discloses a system and a method for monitoring total nitrogen and total phosphorus of a water body. The system comprises an automatic sampling control device, a digestion device and a total nitrogen and total phosphorus color-developing flow path, wherein the automatic sampling control device is connected with the digestion device, and an injection pump provides powder to drive a solution to flow; channels of an eight-channel selecting valve are connected with the digestion device, a phosphorous color-developing agent, the total nitrogen and total phosphorus color-developing flow path and a spectrograph correspondingly; the total nitrogen and total phosphorus color-developing flow path consists of a liquid storage pipe and the injection pump. By the method, a certain amount of digestion liquid is absorbed into the liquid storage pipe sequentially after digestion is finished, the total nitrogen and total phosphorus are measured sequentially, and pipelines and the digestion device are cleaned automatically after measurement is finished. By virtue of the system and the method, the total nitrogen and total phosphorus can be digested on line and can be measured on line. The system and the method have the advantages of convenience in operation, reliable performance, high sensitivity, high selectivity, low reagent consuming amount and the like.

The invention relates to a biological purification dam. The biological purification dam comprises a dam body which is transversely arranged in a river lake, wherein gabion filtering layers formed by stacking gabion units are respectively arranged on a river side and a land side of the dam body; the inner part of each gabion unit is filled with biological aggregate; a filtering material filling layer formed by filling the biological aggregate is arranged at the inner side of each gabion filtering layer; the biological aggregate comprises construction waste aggregate and a biological film which is attached to the outer side of the construction waste aggregate and is formed by a microbial agent. According to the biological purification dam disclosed by the invention, microorganisms are produced into the biological film which is attached to the surface of a carrier; the carrier carrying the microorganisms is arranged in a direction of being vertical to a river; a retaining dam is formed in a river channel; when river water flows through a retaining dam layer, the microorganisms in the biological film start to act for performing purifying and pollution cleaning on the river water, so that ammonia nitrogen and organic pollutants in a water body are effectively removed, and the self-cleaning capacity of the river is enhanced; an environment of naturally purifying can be provided for the water body of the river channel, a necessary habitat environment also can be provided for aquatic animals, the eutrophication of the water body is prevented, and a landscape effect of the river channel is improved.

The invention provides an ecological ditch with a nitrogen and phosphorus removal function. The ecological ditch with the nitrogen and phosphorus removal function comprises a quasi-three-smooth-side ditch body, a plurality of solid slow release carbon source packing pools and a lifting dam, wherein the solid slow release carbon source packing pools are located below the bottom of the quasi-three-smooth-side ditch body, and the lifting dam is located at the tail end of the ecological ditch in the water flow direction. On the whole, a construction method of the ecological ditch with the nitrogen and phosphorus removal function is developed by taking the problems of a traditional soil ditch and a traditional three-smooth-side cement hardened ditch into full consideration. On the basis that the normal drainage function of a farmland ditch is guaranteed, the functions of a soil adsorption part, a packing adsorption part, a plant adsorption part, a biodegradation part and other parts of the ditch are enhanced, the biological diversity of the farmland ditch is enriched, effective removal of nitrogen and phosphorus pollutants in farmland tail water is achieved, and the ditch is made to serve as a nitrogen and phosphorus pollutant treatment unit between the farmland tail water and a receiving water body.

The invention discloses a multistage-series stepped natural-type artificial wetland. The multistage-series stepped natural-type artificial wetland comprises N-stage wetlands, wherein water distribution channels having depths which are sequentially increased along a water flow direction are arranged between every two adjacent wetlands; and the wetland of each stage is sequentially composed of aquatic plants, a soil layer and a matrix layer from top to bottom, and artificial porous permeation tubes are arranged in the matrix layer along the water flow direction. A construction method for the wetland comprises the following steps of: a) excavating a wetland bed body; b) performing anti-seepage treatment; c) filling a matrix and the permeation tubes; d) covering the coil layer; e) building the channels; f) cultivating aquatic plants; and g) purifying a water body. Via the wetland and the construction method for the same, the automatic flowing of sewage is realized, and energy is saved; the water distribution channels and the permeation tubes with different depths are beneficial to the survival of aerobic micro-organisms and anaerobic micro-organisms, thus realizing rapid and efficient purification for sewage; and by distributing the artificial porous permeation tubes, the free permeation of the water body is ensured, the contact surface area is increased, the purification capacity is improved, the blockage of the matrix layer and the eutrophication of the water body are avoided, and the service life of the wetland is prolonged.

This invention discloses a method for producing rise-fall artificial plant floating bed for wastewater biological treatment. The main body of the floating bed is hollow and sealed, and a planting groove is set on the main body. Filler and plants are placed in the planting groove. A support is set in the planting groove, which is connected with water body. Bed connectors are placed surrounding the main body of the floating bed. At least two main bodies are combined to form the floating bed, which is placed on the water surface. The roots of the plants on the floating bed can realize filtration, absorption and adsorption of pollutive substances in wastewater. The floating bed is sinked into the non-frozen layer below water surface in winter, and taken out of water surface inspring. The plants are left for further filtration, absorption and adsorption of pollutive substances in wastewater. This invention has such advantages as short project period, and rapid acting. Plants of the floating bed have a survival period of more than 8 months / year. The planting can match city landscape, thus are good for city afforestation, and can reduce secondary assembly cost. The floating bed just needs replanting in spring.

The invention relates to a preparation method of a non-phosphorus corrosion and scale inhibitor. The preparation method of the non-phosphorus corrosion and scale inhibitor is characterized by being blended from the following components in percentage by weight: 1) 5-15% of polyepoxysuccinic acid, 2) 5-15% of a dirt dispersion agent, 3) 20-50% of organic carboxylic acid, 4) 5-10% of zinc salt, 5) 0.1-0.5% of imidazole, 6) 0.5-3% of an inorganic corrosion inhibitor, and 7) the balance of water according to mass percent, wherein the polyepoxysuccinic acid is a market-sold liquid preparation, the solid content is 40%, and the degree of polymerization n is an integer of 10-50. The preparation steps are as follows: adding the zinc salt and the inorganic corrosion inhibitor in a fixed amount of water, fully stirring to completely dissolve the zinc salt and the inorganic corrosion inhibitor, then adding the polyepoxysuccinic acid, the dirt dispersion agent and the organic carboxylic acid, fully stirring, finally adding the imidazole until the imidazole is completely dissolved, and filtering.

The invention belongs to envrionmental protection technique field, in detail relates to a method for increasing organic aicd output through adding anion surface active agent and controlling basic pH value. It takes primary sludge, excess sludge or mixture of them in wastewater treatment plant, converses organic matter in insoluble sludge to organic acid maximumly by adding anion surface active agent, controlling basic pH and employing bacteria function in said sludge. The ratio between consumption amount of anion surface active agent and sludge dry amount is 0.01: 1- 0.1- 1, the pH is controlled between 8 to 12 for bacteria action, the retention time of sludge in reactor is from 5 hours to 30 days. The invention increases organic acid output when makes full use of sludge and reduces environmental pollution.

The invention provides a grouper fry breeding method. The grouper fry breeding method adopts clean water to breed fries and includes steps of adding cement blocks and plastic plates with holes into a cement tank as shelters of the fries, so as to protect the fries from being scared by clear water, and culturing monodus subterraneus and rotifera as baits in the other water tanks, so as to prevent water quality in the cement tank from eutrophication and deterioration. The problem about baits can be solved by feeding. In addition, indoor fry breeding is unaffected by weather, the clear water contains few algae, organic matters and microorganisms, water quality is not easy to change, and with reasonably using photosynthetic bacteria, water quality is relatively easy to control. Accordingly, the grouper fry breeding method has the advantages of stability in fry breeding technology and high fry survival rate.

A novel sewage treatment process utilizing ferrate oxidization to reduce sludge quantity comprises the steps that a emical treatment unit effectively removes and converts organic pollutants into inorganic small molecular substance through microorganism in a biochemical treatment system, and the certain sludge concentration in the biochemical treatment unit is maintained; in a sediment unit, sewage produced after the treatment of the biochemical treatment unit enters a secondary sedimentation tank to perform sludge-water separation, a part of subsided sludge is excess sludge, the rest is returned sludge, and two third of returned sludge directly enters the biochemical treatment unit; in a ferrate oxidization treatment unit, one third of returned sludge enters a sludge reaction tank to react with input ferrate for 10-30 minutes, wherein the mass ratio of the ferrate to the excess sludge is 0.2:1; and a sludge dewatering unit performs filter pressing or centrifugal dewatering of the excess sludge. The novel sewage treatment process can reduce 35-45% of excess sludge quantity, has the advantages of being simple in devices, few in investment, free of pollution, convenient to operate and manage, low in operation cost and the like, and is suitable for application of industrial municipal sewage treatment plants.

The invention relates to a device and method used for offshore fertilization and pesticide application through an unmanned ship and a drone, and relates to the field of cultivation in water areas through assistance of an unmanned ship. The device consists of a cultivation carrier, an unmanned ship and a drone. A material filling device and a drone recycling device are arranged on an unmanned ship body. Through the cultivation carrier, materials are applied to a cultivation region, the drone detects condition information of the cultivation carrier and the unmanned ship helps the drone to supply materials for the cultivation carrier. Thus, improvement of efficiency for applying materials to the cultivation region is achieved; by applying the unmanned ship technology to the offshore cultivation industry, risks in offshore operation of fishermen are reduced; and efficiency of offshore operation is improved.

This invention relates to a method for promoting sludge to producing organic acid with a surface active agent, which takes the elementary deposition mud, residural sludge or their mixtures of a pollutant water process plant as the raw material to turn the undissolved sludge organics in the mud to organic acid acted by microbials in the mud, the ratio of the volume of the surface active agent and the dry sludge is 0.01: 1-0.3 : 1 and sludge stays for 5 hours ¿C 30 days in the reactor, which reduces volume of sludge and pollution to the environment and uses it as the resource.

The invention discloses an ecological processing system used for aquatic product culture waste water and a method thereof. The system comprises a filtering-feeding fish culture pond, a primary filterpool, a biological floating island processing pool, a secondary filter pool, and a benthophyte treatment pool; wherein the primary filter pool and the secondary filter pool are filled with pelelith, plants are planted on an upper surface of the pelelith, and microbe bacterial strains are placed at a lower part. Through multilevel processing, each level of processing adopts omnibearing and multi-layered processing measurements, the aquatic product culture waste water can be efficiently processed and purified, and can be recycled, so that the ecological processing system achieves eco-environmentprotection.

The invention relates to the field of livestock and poultry feces treatment methods, and in particular relates to a deep dehydration recycling method for livestock and poultry feces. The method specifically comprises the following steps: adjusting the pH value of the livestock and poultry feces to be 2-4, adding ferrite or ferric salt into the livestock and poultry feces with the adjusted pH value, uniformly stirring, subsequently adding hydrogen peroxide into the livestock and poultry feces, stirring for 50-180 minutes, adding a phosphorus curing agent into the treated livestock and poultry feces, adjusting the pH value to be 8.5-10.5, uniformly stirring, and performing filter pressing on the treated livestock and poultry feces by a filer press for dehydration. The method is high in speed, short in period, high in solid recycling rate, high in dehydration degree, low in energy consumption and low in cost.

Disclosed is a pond culture circulation system based on a bio-toilet module including a culture pond and an annular treatment channel surrounding the culture pond. The annular treatment channel is sequentially provided with a sedimentation zone, a biological purification zone and a water storage zone along a direction of water flow. The culture pond includes a plurality of culture pond units. Each of the plurality of culture pond units is provided with a bio-toilet module in communication with the sedimentation zone through a sewage pipe. The water storage zone communicates with each of the plurality of culture pond units through a gravity-flow culvert. The invention further discloses a use method of the pond culture circulation system based on the bio-toilet module.

The invention discloses a marine culture device equipped with a feed recovery drum. The marine culture device comprises a cylindrical culture box used for culturing, wherein the bottom part of the interior of the culture box is separated into the feed recovery drum through a partition plate; the marine culture device also comprises a feed distribution mechanism used for feeding a feed; a stirringbox is connected with and arranged above the feed distribution mechanism through a conveying pipe; the upper part of the stirring box is connected with a feeding hopper; one side of the interior of the feed recovery drum is connected with a water conveying pump; and the other side of the interior of the feed recovery drum is connected with a collection pipe which is connected with a liquid suctionpump. The marine culture device provided by the invention can effectively solve the death of a cultured animal due to turbidity of a culture water body, effectively improves the survival rate of thecultured animal, and can realize controllable feeding and recycling of the feed.

The invention discloses a novel compound water treatment agent. According to the formula, the novel compound water treatment agent comprises the following components including, by weight, 2-4 parts of sodium polyacrylate, 25-35 parts of poly-aluminum ferric silicate sulfate, 20-25 parts of starch, 3-7 parts of sodium lignin sulfonate, 3-5 parts of polyepoxysuccinic acid, 5-7 parts of alkyl epoxy sodium carboxylate, 3-5 parts of sodium alginate, 2-5 parts of sodium citrate, 2-7 parts of zinc sulfate, 25-30 parts of sodium silicate, 2-5 parts of hydroxyapatites and 4-6 parts of sodium hypochlorite. The water treatment agent is environmentally friendly, low in cost and good in purifying effect, and can be applied to water treatment of waste water, sewage and the like.

The invention discloses a lift type double positioning modularized submerged plant water purifying device. The lift type double positioning modularized submerged plant water purifying device comprises multiple lift type double positioning modules respectively composed of mattress main bodies and buoyancy systems, wherein each buoyancy system comprises a frame type support, and foam sheets are bound on the frame type supports; each mattress main body comprises a mattress water level regulating frame which is internally provided with a communicating space inside and is composed of an upper rectangular frame, a lower rectangular frame, a latticed connecting pipe and a vertical connecting pipe, a foam supporting plate is fixedly arranged on each lower rectangular frame, multiple holes are formed in each foam supporting plate, and a plastic planting basin planted with submerged plants is embedded in each hole; and an adjustable connecting rope is arranged between each mattress main body and the corresponding buoyancy system. The lift type double positioning modularized submerged plant water purifying device can be used for adjusting positions of the submerged plants in water in a light compensation depth vertical space by virtue of irrigation and water pumping inside each mattress main body and the effect of each adjustable connecting rope, so as to realize change of an ecological niche of the submerged plants along water level, transparency and the like, and the lift type double positioning modularized submerged plant water purifying device has the advantages that multiple aquatic plants can be planted, varieties are rich and the survival rate is high.