106results about How to "Fresh water" patented technology

Disclosed is an efficient breeding method for river crabs in a pollution-free pond. The pond is rectangular and in an east-west direction, the length-width ratio of the pond is 2:1, the water plant planting area of the pond is 60% and positioned in the middle of the pond, an annular ditch with the width of 70-80cm is dug in the periphery of the pond to serve as a holding pond for the river crabs, the crab breeding density of the pond needs to be controlled within 600-700 crabs / mu, transparency of pond water is higher than 30cm when the river crabs shell for the first time and the second time, transparency of the pond water is higher than 50cm when the river crabs shell for the third time and the fourth time, transparency of the pond water is higher than 80cm when the river crabs shell for the fifth time, and calcined lime water is periodically splashed into the crab pond once a month.

The invention relates to a hatching device and method for demersal spawns of marine fishes. The hatching device comprises a net cage, a water channel, a bracket, a temperature controller indicator, a probe, a heating rod, a water inlet hose, a sinker, an air inlet hose, an air stone and an annular water injector, wherein the net cage and the bracket are located in the water channel; the net cage is bound on the bracket; the water inlet hose and the air inlet hose are located in the water channel outside the net cage; the upside of the net cage is provided with the annular water injector; and the probe and the heating rod are arranged in the water channel. The hatching method comprises the following steps of: controlling a hatching condition; hatching; carrying out microscopic examination observation; carrying out secondary water temperature controlling; managing routinely; collecting larva fish and the like. The hatching method has the advantages that spawn deposition is avoided because of conical point inflation; spawns adhered on net cage edges are washed at any time by the annular water injector; the net cage is conveniently replaced; the water temperature is stably controlled by an electric temperature controller; and the fresh water quality can be ensured due to water feeding and drainage modes of water feeding of the annular water injector at the upside and water feeding of the water channel at the bottom and overflowing of the periphery of the water channel. Therefore, by means of the hatching device and method, a hatching rate of the demersal spawns of the marine fishes in the industrial fry breeding is improved.

The invention relates to a culture method for small and medium-sized litopenaeus vannamei and belongs to the technical field of aquaculture. The culture method specifically comprises the following eight steps of: pond clearing, water introduction, disinfection, bait organism culture, water quality detection, staged shrimp seed putting, staged culture, and small and medium-sized catching and harvesting. The method adopts strict treatment such as secondary sedimentation, disinfection and secondary filtration for water for culture at each stage, one-time water introduction and sealed culture to effectively isolate the invasion of external pathogens, and does not use drugs during the whole culture process, so that the product does not have drug residues and has good quality; the staged shrimp seed putting adopts a method of pure-oxygen aeration and dry transportation by putting shrimp seed into a netting cage, with lower shrimp seed damage rate which is generally controlled below 1.0%; and a three-stage culture mode is adopted for culture and can realize 5-generation culture throughout the year, with the average yield of 750-1,000kg / mu, the culture success rate higher than that of conventional culture by 20-30%, and the output value increased by 50% compared with a conventional mode.

The invention provides an artificial Siberian sturgeon propagating method and a hatch device. The artificial propagating method includes six steps of selecting parent sturgeon, parent sturgeon breeding, artificial parturition facilitating, artificial fertilization, hatch and fry breeding. Lowering the water temperature artificially when breeding the parent sturgeon and injecting sturgeon pituitary can stimulate the gonad of the parent sturgeon to grow mature in advance. Artificial fertilization, hatch and fry breeding can solve the influence of limitation of the season and region on the Siberian sturgeon, and then the fine fry of the Siberian sturgeon can be provided stably and continuously to meet the available requirement for the fine sturgeon fry from the culturist all through the year. The hatch device includes a water providing pipe, a water inlet pipe and a water distributing pipe. An overflow opening is also arranged on the upside of the fry collecting pipe hatch bottle parallel arranged on the edge of the hatch bottle, a temporary feeding pond is arranged on the bottom of the lower end of the fry collecting pipe. The hatched fry can enter into the fry collecting pipe through the overflow opening, and then enter into the temporary feeding pond, and then the automatic fry collecting effect is realized, the invention dispenses with manual collecting as well as lowers the labor intensity greatly.

This invention is a three position and five way valve, its rotating electromagnetic iron rotor, five way rotary valve axis of rotation, and manual spanner engaged with those of the others, coaxial gyre, so, it can be used manually and automatically, and has advantaegs of small volume, low cost. It can replace the existing automatic control valve, is applicable to automatic control of small water treatment device. Three kinds of water treatment devices controlled by this valve; totally automatic household tap water treatment system can purify bath water and drinking water, bath water purifier doesn't need to change the filter element in ten years, and reloading period of drinking water purifier is prolonged to at least one time; water treatment device for removing heavy metals can remove plumbum, nickel and arsenic etc. several decades poisoning heavy metals, make sure the safety of users who live in polluted areas such as mineral etc.; bath water purifier not only useful for the health of human being, but also useful for hairdressing, for waste water treatment and recovery.

The invention relates to a method for breeding rice field eels at high density in flowing water under controlled-temperature condition, which belongs to the technical field of fishery science application, and is characterized in that: a flowing water culture pool is built in a fully-closed greenhouse, and strong rice field eel fry are selected; fry are added according to a density of 5 to 6kg / m<2>; the fed feed is the mixture of commercial rice field eel compound feed and fresh silver carp flesh; the daily additive amount of feed is 4 to 6 percent based on the weight of the rice field eels; and micro flowing water is kept in the flowing water culture pool, the flow rate is kept between 0.05 and 0.10m<3> / h, and the water temperature of the flowing water culture pool is kept between 25 and 28 DEG C. In the invention, the large-scale soilless flowing water culture pool is built, an in-greenhouse controlled-temperature culture mode has the advantages of fresh culture water with rich dissolved oxygen, high culture density, and high feeding drive and growth speed and few diseases of the rice field eels and is an industrial culture mode; and compared with the prior pool net cage culture mode, the culture mode has higher per unit area yield and greater economic benefit.

The invention relates to a boiled water machine / a hot water device. The functions of a boiled water machine and a hot water device are organically combined into a whole so as to avoid repeated investment. Firstly, water is preheated to drinking water of 90 DEG C and hot water of 60 DEG C respectively through a drinking water heating cup and a hot water heating cup; secondly, the drinking water of 90 DEG C is unidirectionally guided out from the drinking water heating cup to a drinking water valve through utilizing a parallel check valve in a water outlet of the drinking water heating cup and the hot water heating cup, thereby realizing the function of the boiled water machine; or the drinking water of 90 DEG C and hot water of 60 DEG C are guided out in parallel from the drinking water heating cup and the hot water heating cup to a cold / hot water mixing valve and are mixed into hot water of 70 DEG C, thereby realizing the function of the hot water device.

The invention discloses loach water breaker opening bait put into a pond and a culture method thereof, relating to loach bait. The method selects a rotifer as the optimal loach water breaker opening bait put into the pond and the culture method comprises the following steps: (1) before water breaker is put into the pond, cleaning silt of the pond, thoroughly disinfecting the pond and killing harmful bacteria and viruses; (2) putting a proper amount of biological bacterial manure into water; and (3) putting loach water breaker after generating proper density of rotifers. The bait cultured by the method is biological bait and has all-round nutrition; the rotifers favored by the loaches are cultured by bacteria, palatable and easily obtained; biological bacterial manure can carry out photosynthesis to increase dissolved oxygen in water and keep the water quality fresh; and the bacteria can accelerate the decomposition of organic matters in water, reduce water body pollution and oxygen dissolved consumption, fully utilize inorganic matters decomposed in water body to synthesize organic matters and promote the circulation of matters in the water body.

The invention relates to a novel special water purifier of a drinking water machine, comprising a raw water bucket, a purified water bucket, a filter element, an upper float valve and a lower float valve; the upper float valve is arranged in the purified water bucket and is used for controlling the highest water level in the purified water bucket; the lower float valve is connected with the outlet of the bottom of the purified water bucket and is used for controlling the highest water level in a water bucket of the drinking water machine; the raw water bucket is arranged above the purified water bucket; the filter element is fixedly connected to the bottom of the raw water bucket, and the filtering material in the filter element is made of micro-porous ceramics or hollow fiber; the water purification technique is as follows: powdery water treatment material is firstly blended with raw water and then the filter element is used for filtering. Compared with the special water purifier of a drinking water machine in the prior art, the novel special water purifier of the drinking water machine has the advantages of more humanized operation of the water purifier, high volume utilization rate of the water purifier, saving material, fresh water quality, low gravity center, good stability, high effective utilization rate of the water treatment material, saving the water treatment material resources, more complete purification and more reliable quality of yielding water.

The invention relates to an environment-friendly direct drinking water machine which can recycle all sensible heat; during the process that upper water is heated to 100-200 DEG C for sterilizing to become drinking water, a closed-circuit caloric content cycle, which is formed by 1-40 DEG C small temperature difference heat exchange technology, is adopted for producing the drinking water, the temperature of which is higher than that of the upper water by 1-40 DEG C, and 50-99% of sensible heat is recycled in total; therefore, only by compensating 1-50% of sensible heat loss and heat loss in the systemic circulation through heating, 20-1000 liters of drinking water can be produced by one kwh of electricity, the coefficient of performance of the drinking water machine can reach 80, which is 100 times of the traditional electric kettle for boiling water (100 DEG C); therefore, the drinking water machine is the most energy-saving product in the world in the 21st century.

The invention discloses a large-scale common sucker breeding method capable of controlling the temperature of circulating water. The method comprises the following steps of parent fish selection, parent fish rearing, artificial spawning induction, artificial fertilization, artificial incubation, larva fish cultivation, disease control and the like. In an artificial breeding process, the temperature of the water is controlled in a range of 15-20 DEG C by using a circulating water temperature controlling technology, the water is circulated and is used efficiently, the prosperous breeding period of common suckers is greatly prolonged, adverse effects on artificial breeding due to over low water temperature in the early stage and over high water temperature in the later stage are avoided, and the problems that the water quantity is insufficient, the water quality is deteriorated and the water is polluted in the breeding period are solved. According to the technical scheme obtained from scientific experimental research and production practice, the spawning induction rate, the spawning rate, the fertility rate, the hatching rate and the emergence rate of the common suckers can be greatly improved, the bottleneck on large-scale breeding of the common suckers is solved, and the large-scale common sucker breeding method plays an important role in scientific research, population protection and artificial breeding of the common suckers.

The present invention provides a blue crab breeding method in autumn and winter, which relates to a blue crab breeding method. The present invention provides a blue crab breeding method in autumn and winter integrating monosex cultivation, overwintering, fattening and reddening. The method described by the present invention comprises: draining water in cultivation pool and insolating bottom mud to crazing, cleaning pool by quicklime before stocking; filtering water by a water feeding screen, fertilizing and developing the pool water, selecting copulated mother crab and confirmed copulated female crab after autumn begins; selecting the stocking density of 2.2 to 4.5 per m<2>; selecting cultivation time from the beginning of October to the beginning of November, mating season to next year last ten-day period of January to the beginning of February, and culture-cycle of 3 to 3.5 months; and the method described by the present invention is characterized in that the water quality requires that the temperature is 5 to 30 DEG C, the salinity is 6 to 15, the pH is 7.8 to 8.5, the transparence is 30 to 40cm; the water changing amount per day is 20 percent to 50 percent, water added quicklime is splashed and spread into the whole pool after dissolved every ten to twenty days, the amount of quicklime is 0.02 to 0.03 kg / m<3> pool water; and the bait is fed one time every day.

The invention relates to a breeding technology for large-size parents of Eriocheir sinensis. The breeding technology comprises the step of selecting the athletic parents of the Eriocheir sinensis, wherein the size of the female crab is above 150g and the size of the male crab is above 200g; the breeding technology is characterized by comprising the following steps: from the last ten-day of October to the first ten-day of November per year, soaking the selected parents of the Eriocheir sinensis into fresh water with tiny running water and sufficient oxygen for 2-3 minutes, and then taking out; after 3-5 minutes, disinfecting by using potassium permanganate; temporarily breeding in an indoor glass reinforced plastic over-wintering pool; starting the over-wintering breeding for the parents of the Eriocheir sinensis in the middle ten days of December; at the beginning of March per year, at a mating moment, controlling the water temperature at 9-12 DEG C, wherein the male and female ratio is (1.5-2):1 and the mating density is 7-13 pieces / m<2>; after oogenesis, continuously aerating and increasing the inflating volume, wherein the breeding temperature for the larva of the Eriocheir sinensis is at 24-25 DEG C and the breeding seawater salinity is 1.8%; and feeding rotifera, fairy shrimp larva and fresh water cladocerans biological baits.

The invention provides a novel instant heating drinking water machine without heat tank, comprising drainage outlet of fountain in the drinking water machine and valve, throttle device and electrical heater on the pipe between drainage outlets. Said electrical heater is set vertically. The water inlet is set at the bottom and the water outlet is connected with the water outlet of drinking water machine. Compared with prior technology, the invention is provided with following merits that the flow temperature at the tap for hot water can achieve the setting temperature of user and the flow temperature can be adjusted by user in stepless. It is also provided with fresh water quality, less steam, little noise, energy saving, no temperature transferring, simple structure, low cost, high stability and good safety.

The invention discloses an indoor gorgon euryale planting method. The indoor gorgon euryale planting method comprises the steps of seed germination accelerating, planting, management after budding, harvesting and storage and package. According to the indoor gorgon euryale planting method, seeds are subjected to mechanical, hormone and low-temperature treatment, the time is short, germination is quick, and the germinating rate is up to 95.6%. The growing conditions of gorgon euryale are strictly controlled at different stages, the gorgon euryale can be planted all year around, and the shortcoming that one-time harvesting can be only performed each year in traditional planting is overcome; indoor cultivation is adopted, the environment is clean and tidy, a small amount of water is changed every day to keep water fresh and free of weeds, a traditional Chinese medicine disinfection bag is soaked in a pond to inhibit gorgon euryale diseases and insect pests, manpower and material resources are saved, pesticide residues are avoided, and edible safety is ensured. Low-temperature baking and drying are adopted, the drying speed is high, the bright color of the gorgon euryale is kept, nutritional loss is small, moisture regaining does not occur, the gorgon euryale is easy to store, the cool nature of the gorgon euryale can be removed through repeated drying to make drug properties slightly mild, a health-care effect is improved, and the gorgon euryale is beneficial to digestion and absorption and also reinforces the spleen and kidney.

The invention discloses a phase-change and heat-storage solar water heater comprising a fixed support, wherein a plurality of vacuum tubes are fixed on the fixed support and internally provided with heat tanks (heat storage elements); inorganic phase change materials and heat exchange water flow pipelines are arranged in the heat tanks (heat storage elements); and a flow channel header box is fixed at one side of the fixed support, internally provided with a water inlet pipe and a water outlet pipe and filled with heat insulation materials. The phase-change and heat-storage solar water heater has a simple structure, is convenient to install, high in heat efficiency of a system and easy in building integration, runs by bearing pressure, and overcomes the defects that a common solar water heater has a heavy appearance, occupies a large space, and is difficult in building integration, emptying and control, the accumulated water in the common solar water heater deteriorates, and the like.

The invention discloses a Procambarus clarkii and semilate rice rotation planting method capable of stabilizing the grain income and increasing the fishery income. The method includes the steps: selecting a rice field, and digging circular Procambarus clarkii breeding ditches and field furrows, wherein the total area of the circular Procambarus clarkii breeding ditches and the field furrows is 5-10% of the area of the rice field; increasing the height and the width of ridges, reinforcing the ridges, flatting a filed surface; additionally arranging escape-proof facilities in a drainage opening; transplanting rice seedlings in the rice field in the first ten days of June, wherein the density of the rice seedling is 1.3-1.5 ten thousand / mu; stocking the Procambarus clarkii parents; and performing daily management. The Procambarus clarkii and semilate rice rotation planting method can cultivate the rice and the turtles together, is low in technical difficulty, is small in investment, is low in breeding risk, and is high in return rate.

The invention discloses a micro-flowing-water ecological breeding method for rare fishes in a rice field. The breeding method comprises the following steps of (1) selection of the rice field; (2) rice field transformation, wherein an enclosing ridge is built around the rice field, a water inlet and a water outlet are formed in the enclosing ridge of the two opposite corners of the rice field, then, fish ditches of cross-shaped structures are dug in the rice field, and finally, a feeding breeding ditch communicated with the fish ditches is dug in one side of the rice field; (3) rice planting, wherein manual transplanting of rice seedlings is conducted in rice planting areas in the rice field; (4) fry release, wherein 15 days after transplanting of the rice seedlings, fry are stocked in the feeding breeding ditch, and most of fry of sinocyclocheilus graham, schizothorax taliensis, neolissochilus benasi and spinibarbus sinensis bleeker are stocked; (5) feeding management, wherein after the planted rice seedlings turn green, artificial feed needs to be added into the feeding breeding ditch every day; (6) daily management. The allocation of mixedly-bred fry types is reasonable, planning for the rice field is proper, a scientific feeding mode is adopted, the growth speed of the fry is increased, and the yield of rice is also increased, so that the benefit of mixed fish breeding in the rice field is significantly increased.

The invention discloses a comprehensive planting and breeding method for paddy rice for stabilizing the grain yield and increasing the farmer income and Zhong Ke No.3 crucian carps. The method includes the steps that a paddy field is selected and transformed; the paddy field is selected and hardened, and a bait-throwing site is set; a water inlet and a water outlet are formed in ridges at two opposite angles of the paddy field, and anti-escaping facilities are additionally arranged at the water inlet and the water outlet; carp ditches and carp pits are excavated in the paddy field, and the ditches are communicated with the pits; paddy rice is planted; base fertilizer is applied to the paddy field, and the paddy rice is planted with the density of 9000-12000 holes of transplanting per mu; fish fries are stocked; after rice seedlings turn green, Zhong Ke No.3 crucian carp fries are stocked, the specification of the fish fries is 30-50 g / each fish, and 200-400 fishes are stocked per mu of paddy field; meanwhile, 400-600 fishes of summer fishes with the length of 4-6 cm are arranged per mu of paddy field; daily management is carried out and includes fodder particle throwing, fertilizer applying, paddy field drying in sunshine, disease and insect pest prevention and treatment, weed removing, bird strike prevention and water amount control.

The invention relates to a water purification machine, comprising a machine base, and a coarse filtration system and a fine filtration system which are mounted on the machine base. The water purification machine is characterized in that a mounting base with a triangular cross section is arranged on the machine base; a pedestal is arranged at the bottom of the machine base; an electrical element for controlling the systems is mounted in an accommodating cavity between the pedestal and the mounting base; the coarse filtration system is provided with two groups of filter elements connected in parallel; the fine filtration system is provided with two groups of reverse osmosis (RO) membrane assemblies connected in parallel; and the two groups of filter elements and the two groups of RO membrane assemblies are mounted on the inclined surfaces at the two sides of the mounting base respectively. The water purification machine is reasonable and compact in structure, convenient to assemble and low in cost; the water output quantity is large; and the water quality is fresh.

The invention discloses a high-hot-water-output antibacterial water heater. The high-hot-water-output antibacterial water heater comprises an outer shell, an inner container arranged in the outer shell, a water inlet assembly and a water outlet tube, wherein the water inlet assembly and the water outlet tube are arranged on the inner container. The water inlet assembly comprises a tube body and a flow guide part which are arranged in a concentric manner. A sealing cover is arranged at one end of the tube body. Water outlet parts are arranged on the side wall of the tube body. The flow guide part comprises a support and a plurality of flow guide fins which are arranged on the support and correspond to the water outlet parts in position. Compared with the prior art, the high-hot-water-output antibacterial water heater has the beneficial effects that the water inlet assembly is simple in structure, small in part number and convenient to assemble; and in the process that cold water flows through the water inlet assembly to enter the inner container, the cold water can be slowly and smoothly injected into the inner container through the water inlet assembly under the condition that the existing flow of the injected cold water is kept, the cold water is accumulated at the lower portion of the inner container, the hot water output rate of the high-hot-water-output antibacterial water heater is greatly increased accordingly, a user can use more hot water, and the energy saving effect is obvious.

The invention provides a Thais bronni breeding method. The Thais bronni breeding method comprises the following steps of: collecting and incubating fertilized eggs; cultivating larvae; and cultivating juvenile mollusks, wherein the fed baits in the pelagic period of larva cultivation comprise chrysophyceae, chlorella, tetraselmis and chaetoceros in a ratio of 10:1:1:1; during metamorphosis period before juvenile mollusk period, the varieties and the amounts of the fed baits, including shrimp slices and razor clam meat, are increased along with time; and the prawn slices and the razor clam meat with a certain ratio are maintained during cultivation of the juvenile mollusks. According to the thais bronni breeding method, different bait constitutions and feeding amounts are provided for successful growth of the thais bronni in each development stage of the thais bronni. Compared with the prior art without artificial breeding, the method establishes the basis of artificial breeding of the thais bronni, so that artificial culture of the thais bronni can meet the requirements of the market.

The invention belongs to the technical field of culture and particularly relates to an ecological culture system of river crabs. The ecological culture system comprises an isolation assembly, a drivemechanism for conveying is arranged on one side of the isolation assembly and is connected with a cleaning assembly for cleaning, two switching assemblies used for switching the cleaning assembly arearranged on two sides of the cleaning assembly, the switching assemblies are distributed at two ends of the isolation assembly, a blocking assembly connected with the isolation assembly is arranged atthe bottom of the cleaning assembly, and the ecological culture system further comprises an application method of the ecological culture system of the river crabs. By the arrangement, the river crabsare cultured, irrigation canal water grass is removed, the irrigation canal safety is protected, salvage of floating matter is facilitated, feeding is facilitated during culture, the culture efficiency is improved, aquatic plants in irrigation canal riverway are removed, and the riverway is dredged.

The present invention discloses a reverse osmosis water purification and dispensing machine structure and an energy saving method therefor. An inlet of a self-priming booster pump is connected to an external water source, an outlet of the self-priming booster pump is connected to an inlet of a prefiltering system, and an outlet of the prefiltering system is connected to an inlet of a reverse osmosis membrane; a water outlet end of the reverse osmosis membrane further comprises a purified water outlet and a concentrated water outlet, and purified water accesses a user for use by the purified water outlet. According to the present invention, under conditions of a designed temperature, pressure and the like, the produced purified water is good in water quality, thereby greatly improving the recovery rate of a water purification system; it is ensured that states of the waterway such as the operating pressure is maintained at conditions such as the design pressure, thereby greatly reducing the electrical energy consumption; the concentrated water formed on the surface of the reverse osmosis membrane can be discharged in time when the booster pump performs replenishment for the next time, thereby ensuring the freshness of water entering by the surface of the reverse osmosis membrane, and greatly prolonging the service life of the reverse osmosis membrane; and after operating for every certain period of time M min, Ns flushing is performed, with an intention of washing the reverse osmosis membrane, thereby further prolonging the service life of the reverse osmosis membrane.

The invention discloses a filter system of a water purifying plant and the water purifying plant with the same. The filter system comprises a prepositioned filter element, a booster pump, an RO membrane filter element, a flexible water bag, a post-positioned filter element and an UV lamp, wherein the prepositioned filter element is connected with an outer water source to preliminarily purify the water quality; the booster pump is connected to the downstream of the prepositioned filter element through an inlet water magnetic valve; the RO membrane filter element is connected with the downstream of the booster pump and is provided with a water inlet, a purified water outlet and a wastewater outlet; the flexible water bag is connected with the purified water outlet of the RO membrane filter element; the post-positioned filter element is connected with the flexible water bag through a water pump so as to further purify water from the flexible water bag, and is applicable to being connected with a water faucet; and the UV lamp is used for sterilizing water in the flexible water bag. According to the filter system of the water purifying plant dislcosed by the embodiment of the invention, the UV lamp can be used for sterilizing the water in the flexible water bag once again, and the flexible water bag is prevented from bacteria breeding during long-term suspension, thus further improving the water quality of drinking water and ensuring health drinking water for users.

The invention provides cooking equipment, a control method thereof and a control device thereof. The control method of the cooking equipment comprises the steps that a water shut-off prosecution stepis operated before the cooking equipment runs a cooking mode, wherein the water shut-off prosecution step comprises: a control valve is controlled to be turned on; a current flow value in a water outlet pipe is detected; whether or not the current flow value is smaller than or equal to a preset value is determined; when the current flow value is smaller than or equal to the preset value accordingto the judgment result, an alarm reminder is sent our and / or the cooking equipment is turned off. The control method can avoid the problem of dry burning of the cooking equipment caused by lack of cooking water in the cooking mode, the damage probability of products caused by dry burning is reduced, and the use safety of the products is ensured.

The invention provides a water treatment system for aquaculture. The system comprises a floating platform, an aquaculture water tank, a circulating water pump, a filtering and separating device, fans,a water tank bottom purging system and a biochemical filtering pool, wherein the biochemical filtering pool is connected with the filtering and separating device through a pipeline; the aquaculture water tank is embedded in the floating platform; the circulating water pump comprises a deepwater submersible pump and a surface water submersible pump; the filtering and separating device comprises amicrofiltration machine and a protein separator, the microfiltration machine is connected with the deepwater submersible pump through a pipeline, the protein separator is connected with the surface water submersible pump through a pipeline, and the fans are connected with the water tank bottom purging system in the aquaculture water tank, the protein separator and the biochemical filtering pool through pipelines respectively. According to the water treatment system for aquaculture, aquaculture water and pond water are separated, the aquaculture system is subjected to life support treatment with circulating water, the aquaculture water is purified and flows into a pond for secondary purification, then the water is circulated in the aquaculture water tank, so that water resource is recycled,the purification effect is ideal, and dynamic balance of water is realized.

The invention relates to a fish-grazing grass-controlling type river crab aquaculture pond water quality control device and method. In order to fill the blank in the prior art, the water quality control device comprises a floating raft and a net cage, the net cage is fixed to the floating raft, the floating raft is rectangular and comprises a rectangular grid plate frame, a handrail and at least four floating boxes, the handrail comprises a fence and stand columns, the net cage comprises side nets on the periphery, a bottom frame and a bottom net, three or four twisting ropes are evenly arranged on the bottom frame, twisting drums are arranged on the fence or the stand columns, the upper ends of the twisting ropes are fixed to and wound on the twisting drums, the bottom frame and the bottom net can be lifted or released by rotating the twisting drums, grass carps with the weight of more than 250 g are bred in the net cage in a stocking mode, meshes of the side nets and the bottom net are prismatic meshes, the side length of the prismatic meshes is 1.5-2.0 cm, and bamboo spars are arranged. The water quality control device is simple in structure and reliable in operation, submerged plants are fully utilized, the water quality of the matched pond is fresh, dissolved oxygen is rich, aquatic plants are flourishing, and an excellent growth environment is provided for the river crabs.

The invention discloses a method for planting elodea muttallii in the concrete pond without oil. The method comprises the steps of pond preparing, elodea nuttallii planting cage body making, eloda nuttallii planting and daily maintenance. Elodea nuttallii cultivation in a cement pond without bottom materials such as soil is achieved by combining the culture practice of crustaceans such as shrimps and crabs according to the growth characteristic of the elodea muttallii. The elodea muttallii which is planted through the method has the advantages that the elodea muttallii growth is fast, the operation is easy, the material cost is low, and the ecological effect is good, and the method for planting the elodea muttallii in the concrete pond without the the oil has an important meaning on cement pool ecological cultivation of aquatic animals.