105results about How to "Avoid water quality deterioration" patented technology

The invention provides a system for carrying out collection, purification and utilization on rainwater on road surfaces, and the system comprises a groove and one or more packing units arranged in the groove, wherein the two sides of each packing unit are respectively provided with a baffle, a ventilation well is formed between two baffles arranged at the head end and tail end of two adjacent packing units, and a ventilation well is formed among the baffles at the two ends of the groove and the inner side wall of the groove; the bottom surface of each packing unit is provided with a concrete grating, a water collecting sump is formed between the concrete grating and the internal bottom surface of the groove, and the water collecting sump is mutually communicated with all the ventilation wells; and the packing unit on the concrete grating is composed of a cobble layer, a gravel layer, a matrix layer and a planting soil layer which are sequentially arranged from bottom to top, and plants are planted in the planting soil layer. Rainwater which is purified by the system disclosed by the invention can satisfy the needs of agricultural water and general landscape water.

The present invention provides an application of a bdellovibrio eliminating pathogenic bacteria in freshwater products and its aquaculture water, especially fit for eliminating pathogenic bacteria carried before freshwater products eating or processing, by transportation process or its aquaculture water. Bdellovibrio concentrated solution is added in aquaculture water, before eating, processing or in the course of transportation, the concentration achieves 10<3>pfu / ml. When the method is applied in freshwater products processing or in the course before processed, or in the course of transportation and in aquaculture water, the concentrations of bdellovibrio telotroch are 10<5>-10<13> pfu / ml, 10<4>-10<12> pfu / ml and 10 <3>-10<7> pfu / ml respectively. The clearance ratios of the bdellovibrio are all above 99%. The invention is fit for the whole process from freshwater products cultivation to the process before eating. The method not only improving the safety factor of consumer raw eating freshwater products, protecting health of consumer, but also playing an important role in green processing production of freshwater products.

The invention discloses a solar-energy semi-conductor temperature-control no-water live-keeping fresh water fish transmission device and method, comprising a fish housing system, a temperature control system, a water in and out system, a water and air circulation system. The live fishes are in dormancy state in the transmission box and transmitted in no-water state at constant temperature, after arriving at a destination, the live fishes in water gradually awake, thus the no-water live-keeping transmission of the live fishes can be realized. During the no-water live-keeping transmission of the live fishes, the semiconductor refrigeration slice is used to cool, and a solar battery and an accumulator are used to provide electric energy. The fresh water fish transmission device and method can increase survival rate of live fishes transmission and transmission stationarity and safety.

The invention discloses a bdellovibrio bacteriovorus bacterial strain eliminating aquatic product Gram-positive pathogenic bacterium and an application thereof. The invention separates to obtain bdellovibrio bacteriovorus BDS02 the length of flagellum of which is at least 1.8mu m. The bdellovibrio bacteriovorus with flagellum on the end is cambered single cell the size of which is 0.65*0.2 mu m when observed by an electron microscope. The two layer plating method is used for cultivating the bdellovibrio bacteriovorus bacterial strain at the temperature of 28 DEG C for four days to form transparent round negativecolony the diameter of which is 1-2mm. Before the microorganism preparation prepared by the bdellovibrio bacteriovorus BDS02 is eaten by aquatic products, common Gram-positive pathogenic bacteria comprising Mycobacterium tuberculosis, star-shaped nocardia asteroids, rhodococcus erythropolis, streptococcus faecalis, staphylococcus epidermidis, clostridium perfringens and corynebacterium glutamicum in the transportation process and cultivation process can be eliminated, which improves the safe factor of raw aquatic products for consumers, protects the health of the consumers and provides guarantee for greenly processing and producing the aquatic products.

The invention discloses an accurate bait feeding method for river crab breeding based on an autonomous working boat, which comprises the steps of firstly determining the throwing amplitude of a bait feeding machine according to the spacing of channels in the path plan of a bait feeding boat, and setting the travel speed of the working boat according to working efficiency requirements; then analyzing image information collected by an underwater camera to obtain the distribution condition of river crabs in the current field-of-view region; and timely adjusting the feeding flow according to the distribution of the river crabs. In addition, whether there is a river crab-free region in the current channel area due to poor water quality can be monitored by the combination of the underwater camera and a dissolved oxygen sensor. Once found, the location is sent to a monitoring APP of a user mobile phone. The accurate bait feeding method can realize accurate feeding of the bait, can reduce thewaste of the bait while ensuring sufficient bait supply for the river crabs, effectively prevents the water quality from being deteriorated due to excessive feeding of the bait, and significantly improves the benefit of river crab breeding.

The invention discloses a multipath water quality online monitoring system which comprises a main controller. The main controller comprises a single chip computer, an LCD display module, a database module, a keyboard module and an output module. The single chip computer is connected with the LCD display module, the database module, the keyboard module and the output module. The single chip computer also is connected with a sensor module through a signal conditioning module. The database module is connected with a workstation computer through an Ethernet module. The output module is connected with a terminal equipment module through a relay output module. The main control unit is connected with a working power supply. According to the invention, the real-time monitoring of water quality can be realized, and the multipath water quality online monitoring system satisfies requirements of aquatic product scientific research, a large-scale aquaculture plant using recycled water culture, and industrialization.

The invention relates to an urban water-supply system based on big data, and a water-supply method. The water-supply system comprises a water-supply high-pressure tank and a main water-supply pipelineand further comprises a circulating water pipeline and a manhole; a plurality of branch water-supply pipelines are connected to the main water-supply pipeline, water in the water-supply pipes can keep flowing through the circulating water pipeline and a circulating water recycle pool to avoid long-term staying and depositing and water quality deteriorating, the water flow and the water quality are monitored in real time through the manhole, the water flow is convenient to adjust in time, sewage is convenient to treat in time, the water-supply method can deal with various emergencies, and various ways can be adopted to guarantee water supply.

The invention discloses a finless eel rice field integral planting and breeding method capable of stabilizing the grain income and increasing the fishery income. The method includes the steps: selecting a rice field, where a land having the pH of 4-7 is used as the rice filed; constructing the rice field, increasing the height and the width of ridges of the rice field, reinforcing the ridges, and additionally arranging escape-proof facilities in a drainage opening; flatting the rice field, and digging drainage ditches; turning over the rice field, drying the rice field in sunlight, smashing soil, and then applying a base fertilizer; applying fermentative chicken manure to the drainage ditches and injecting water from the last ten days of March to the first ten days of April; planting the rice; selecting finless eel fries; stocking the finless eel, disinfecting the selected finless eel fries, and then putting the selected finless eel fries into the rice field; feeding the finless eel with fodder, feeding the finless eel with the fodder once every day during 1-2 weeks after finless eel stocking, wherein the feeding amount of the fodder is 4-8 wt% of the body weight of the finless eel; and then feeding the finless eel with the fodder for 3 times every day, wherein the feeding amount of the fodder is 2-5 wt% of the body weight of the finless eel; managing the water quality, changing water once every 2-3 days in midsummer, and changing water once every 7-10 days in the rest time, wherein the water changing amount is 1 / 3 of water in the rice field; and controlling diseases.

The invention relates to the field of water aeration and water quality monitoring and discloses a moveable water aeration and water quality monitoring intelligent combined system. The system comprises at least one floating plate (1), wherein an aerator (7) is arranged at the lower end of the floating plate (1); a water quality monitoring device (3) is arranged on the floating plate (1); a solar charging device (4) is arranged on the floating plate (1); the water quality monitoring device (3) comprises a central processing unit (305) and a detection probe (309); the central processing unit (305) is connected with the detection probe (309); the detection probe (309) is used for detecting dissolved oxygen content of water and sending the dissolved oxygen content of water to the central processing unit (305); when the central processing unit (305) confirms that the dissolved oxygen content detected by the detection probe (309) is less than a preset value, the central processing unit (305) can send a signal to drive the aerator (7) to start up and then the aerator (7) can aerate in water. The moveable water aeration and water quality monitoring intelligent combined system has the effects of aerating according to the requirements, remotely monitoring water quality parameters, saving energy and protecting environment.

The invention discloses an underflow propeller water body circulation improvement and purification plant and method. A floating island is arranged on a floating camel, and a solar electric power generation system is installed on the floating island. An underflow propeller is connected with the floating camel through a connecting bracket and positioned below the floating camel; the solar electric power generation system is connected with the underflow propeller and used as a working power supply for the underflow propeller; and the fairwater is fixedly installed on the periphery of the underflow propeller, the axial line of the fairwater and the axial line of the underflow propeller are colinear, and the outlet of the fairwater is flared. The device and method have the advantages of obvious water quality improvement effect, simple structure, stable and reliable system operation, high economy, environmental protection, fewer manual intervention traces on appearance and the like, and is convenient for maintenance and management.

The invention discloses an industrial culture system of a pond. The industrial culture system is installed in the pond and is composed of a water pushing aeration unit, a culture feeding unit, a dirt collecting and discharging unit and an ecological purifying unit. The water pushing aeration unit comprises an aeration device, an air blower, a baffle and an air pipe. The air blower is arranged above the water surface, the aeration device is arranged underwater, the air pipe is connected with the air blower and the aeration device, and the baffle is obliquely arranged above the aeration device. A solid-liquid separation device is arranged in the dirt collecting and discharging unit. The ecological purifying unit comprises a large pond water body and an artificial floating island. Aquatic animals are bred in the pond, aquatic plants are planted in the pond, and plants are planted on the artificial floating island. The solid-liquid separation device is used for replacing a solid waste self precipitation separation mode, so that the dirt collecting and discharging efficiency of the system is greatly improved, the solid waste removal rate of the culture pond water body reaches 80%, the water quality of the culture pond is greatly improved, the total culture quantity is increased, the quality of culture varieties is improved, and meanwhile the work time of the aeration device is shortened.

The invention provides an environmentally protective raw fish puffed feed with low emissions of nitrogen and phosphorus. The puffed feed comprises fish meal, defatted soybean meal, corn protein powder, wheat gluten powder, spray dried blood meal, squid small peptides, fish oil, soybean oil, phosphatide oil, choline chloride, flour, tapioca flour, L-lysine hydrochloride, DL-methionine, threonine, tyrosine, taurine, mannan oligosaccharide, vitamin C, trace element premix, vitamin premix, an antioxidant. The prepared raw fish feed can significantly reduce nitrogen and phosphorus emissions, has a strong stability in water, is low in dissolve-loss ratio, and has a high-quality environmentally protective effect.

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 discloses an intermediate cultivating method capable of improving the survival rate of pinctada maxima spats and belongs to the technical field of shellfish culture. The intermediate cultivating method comprises the following steps of choosing 5-20 acres of shrimp pond with the water storage depth between 1.5m and 2.5m, applying fertilizers to cultivate unit-cell algae baits, putting litopenaeus vannamei shrimp seeds, transferring the seeds to 60-mesh polyethylene mesh bags from attachment boards when specifications of the spats reach about 2mm, then suspending and cultivating the spats in the shrimp pond, cultivating and managing the spats, clearing up attachment on the mesh bags every 5-7 days, cleaning up float sludge to keep smoothness of water inside and outside the mesh bags, using 20-mesh mesh bags when the specifications of the spats reach 6-8mm, and using 10-mesh mesh bags when the specifications of the spats reach 10.0-15.0mm. In addition, a bottom material of the bottom of the shrimp pond is sludge and sand, water can be drained in and out of the shrimp pond conveniently, the body length of each litopenaeus vannamei shrimp seed is 1.0-1.5cm, and the density of the litopenaeus vannamei shrimp seeds is 20,000-30,000 per acre. In the 60-mesh mesh bags, the density of the litopenaeus vannamei shrimp seeds is 5,000-6,000 per bag. In the 20-mesh mesh bags, the density of the litopenaeus vannamei shrimp seeds is 2,500-3,000 per bag. In the 10-mesh mesh bags, the density of the litopenaeus vannamei shrimp seeds is 800-1,000 per bag. The intermediate cultivating method is simple in step, low in cost and capable of effectively improving the survival rate of pinctada maxima spats.

The invention provides a CFB boiler emergency water supplementing system without an emergency water supplementing box. The CFB boiler emergency water supplementing system comprises a chemical water desalting water tank and an emergency water supplementing pump. A water outlet and a water return port are formed in the chemical water desalting water tank. The water outlet of the chemical water desalting water tank is connected with a water inlet of the emergency water supplementing pump through a pipeline. A water outlet of the emergency water supplementing pump is sequentially connected with a recirculation port of a self-reliance minimum flow regulating valve and the water return port of the chemical water desalting water tank through pipelines. A water outlet of the self-reliance minimum flow regulating valve is connected with a boiler high-pressure water supply pipeline through a pipeline. When a boiler water supply system is interrupted, it can be guaranteed that the heated face of a boiler is effectively protected through cooling water supplied by the emergency water supplementing system in time, arrangement of the independent emergency water supplementing box is avoided, construction cost and operation cost of the boiler are saved, the problem that the emergency water supplementing function can not be achieved when the emergency water supplementing box is maintained regularly is solved, and the CFB boiler emergency water supplementing system has the prominent advantages of being reliable in water supplementation, environmentally friendly, capable of saving water and the like.

The invention provides an automatic alarm turbidity detection instrument which comprises a controller, a sensor and an alarm device, wherein the controller comprises an input module, a main control module connected with the input module, a display and key module connected with the main control module, a storage module connected with the display and key module, an output module connected with the storage module, a control module connected with the output module and a power supply module for supplying continuous stable current and voltage to all the modules; the sensor is connected with the input module through a cable; the alarm device is connected with the output module.

The invention relates to a fry rearing method of large yellow croakers in earth ponds and net cages. The fry rearing method comprises following steps: mud clearing in ponds, water filling and reconstruction; placing net cages; putting fries; water quality management and control measurements; and rearing management. The fry rearing method of large yellow croakers in earth ponds and net cages has following beneficial effects: waste of formula feed is greatly decreased; water quality deterioration and diseases are reduced; fish is fed in a centralized mode and conveniently observed so that abnormity is promptly observed; reared fish is in the same specification so that survival rate is greatly increased; fish is easily caught and fries are not damaged; fish looks more colorful than ones reared in a bay and shows higher vitality; and a good application prospect is obtained.

The invention discloses an ecological remediation structure enhancing phreatic zone exchanging and belongs to the field of ecological remediation structures preventing river bank erosion. The whole ecological remediation structure is a W-shaped rock block weir and is composed of protection arms, an inner arm and dam abutments. The inner arm is arranged at the center of a river way, the protectionarms are arranged on the two sides of the river way and connected with the dam abutments, and the dam abutments on the two sides perpendicularly stretch into river banks. The ecological remediation structure has multiple functions of enhancing exchanging between surface water and underground water, enhancing the purification effect of a phreatic zone, protecting a river way ecological system, preventing river bank erosion and the like. Compared with a traditional river channel improvement method, the ecological remediation structure has the beneficial effects that a river way surface water andgroundwater system is comprehensively considered, and the purification effect of the river way phreatic zone is given play to; and the cost is low, needed manpower is small, construction is easy, theecological remediation function can be maintained for a long term, and the application prospects in the fields of river way ecological remediation, river bank protection and the like are very wide.

The invention discloses a Procambarus clarkii, soft-shelled turtle and rice integral planting and breeding method capable of stabilizing the grain income and increasing the fishery income. The method includes the following steps: A, selecting a paddy field with sandy soil as a rice field, repairing the rice field, digging furrows and channels, and additionally arranging escape-proof facilities around the rice field; turning over the rice field in winter, disinfecting the rice field through dry-freezing and sunshine in water, using tea cakes or quicklime to disinfect the rice field and kill pests during the first ten days of February; applying a base fertilizer during the middle ten days of February; stacking fermented chicken and duck manure at different sites to fertilize water in the middle ten days of March; stocking Procambarus clarkia parents in the first ten days of March; selecting rice seeds, performing germination accelerating in the first ten days of May, and planting rice seedlings after the age of the rice seedlings is 25-35 days old; stocking young soft-shelled turtles: drain water on a surface of the rice field to the furrows in the rice field when the rice seedlings turn green in the last ten days of June, drying the rice field in sunshine according to the environment temperature, adding water, increasing the depth of water till the height of rice plants is 10-15 cm after the rice has tillers, disinfecting the young soft-shelled turtles, and putting the young soft-shelled turtles into the rice field.

The invention discloses a storage type water heater anticorrosion device, a control method and a water heater. The device consists of a water tank, a battery, an electric control chip, an auxiliary electrode and a reference electrode. The auxiliary electrode and the reference electrode are welded together and disposed in the water tank, and the reference electrode is in insulation connection withthe water tank fixedly to provide a water tank potential measurement reference. The electric control chip leads out a first pin, a second pin, a third pin and a fourth pin, wherein the first pin and the second pin are connected to the positive electrode and negative electrode of the battery respectively, the third pin is electrically connected to the reference electrode, and the fourth pin is connected to the external surface of the water tank. The electric control chip receives an electric signal fed back from the reference electrode and controls the potential of the water tank within a set range based on the electric signal. The battery anode components are replaceable. When a user chooses electrical outage of the water heater or electrical outage outside the water heater, the anticorrosion device still provides continuous anticorrosion protection to the water heater water tank, achieves ceaseless anticorrosion protection, and realizes the long-term safe storage type water heater anticorrosion effect with no need for magnesium rod and no dependence on commercial power.

The invention relates to a pond-based ecological intensive aquaculture system for marine fishes, which includes an aquaculture area, a purification area and a fish excrement collection area. The aquaculture area is composed of a number of parallel isolation walls and blocking nets at the two ends of the isolation walls. There are marine fishes in the aquaculture area. The bottom of the aquaculturearea is an inclined stainless steel plate which inclines at a degree of 5-20. A water pushing device is arranged on the outer side of the higher end of the stainless steel plate. The fish excrement collection area is located on the outer side of the lower end of the stainless steel plate. The aquaculture area, the purification area and the fish excrement collection area are connected. The aquaculture area accounts for 2-5% of the total pond area. The pond-based ecological intensive aquaculture system for marine fishes has the advantages as follows: daily management is convenient; the aquaculture cost can be reduced; the aquaculture yield and efficiency can be improved; a win-win result can be achieved for economic and environmental benefits; the operation efficiency of the ecological function units can be maximized; and the allocation of resources can be optimized.

The invention relates to the field of aquaculture, in particular to a large-water-surface low-cost healthy high-efficiency bighead cultivating method. Facilities of a plankton cultivating tank, a chicken manure fermenting tank and a water tower are built on a water reservoir or a lake more than 500 acres. Chicken manure slurry is injected into the plankton cultivating tank to cultivate plankton suitable for growth of bigheads, so that the stocking proportion of the bigheads in the water reservoir or the lake can be increased to 80%. Aquatic plant products of cane shoots and arrowheads are utilized to consume humus in the plankton cultivating tank and adjust water quality and water temperature in the plankton cultivating tank, so that the possibility of diseases to fish in the water reservoir or the lake is fundamentally avoided. The method uses the chicken manure fermenting tank and the plankton cultivating tank to circularly cultivate plankton to provide good-quality feeds for fish in the water reservoir or the lake. Thus, the purposes of cultivating the bigheads with higher economical value and multiplying the yield of the fish in the water reservoir or the lake are achieved, the production cost is greatly reduced, and good popularization value is achieved.

Belonging to the water treatment field, the invention relates to a method for removal of crystal violet dye in water with a water hyacinth based hydrothermal carbon adsorbent. The method includes thesteps of: making water hyacinth into a muddy state, putting the water hyacinth mud into a reaction kettle, introducing nitrogen into the reaction kettle to form an oxygen-free environment in the kettle body, carrying out reaction in the reaction kettle for 2.5-6h at 180-220DEG C to generate water hyacinth based hydrothermal carbon, performing centrifugation, and conducting washing with water several times, and conducting drying, grinding and sieving to 350-850microm, thus obtaining an adsorbent; adding the adsorbent into a crystal violet solution with an initial concentration of 100-400mg / L, conducting oscillation adsorption for 20-24h under the condition of 10-30DEG C, and conducting centrifugation for solid-liquid separation. Specifically, the adding amount of the water hyacinth based hydrothermal carbon adsorbent is 0.8-1.6g / L. The method provided by the invention not only can alleviate the pollution caused by overgrowth of water hyacinth to the environment, but also can turn wasteinto wealth, remove crystal violet dye in water, achieve waste control by waste, and realize effective utilization of sludge resources and water environment protection.

The invention provides an underwater microalgae oxygenation device based on a light medium. The shape of the device can be three-dimensional transparent cylinder, plane and grid covered by microalgae. Power or light is input to lighten up the whole structure, and frequency and intensity of illumination can be adjusted according to microalgae species, surface cover thickness and oxygenation rate requirements, so as to realize the purposes of increasing the concentration of dissolved oxygen in water and controlling content of soluble pollutants such as nitrogen and phosphorus in the water. The surface of the device is pre-coated with a single species or a variety of microalgae to form a powerful growth area, and the device also can be put directly in the water for usage under the conditions of low requirements on the microalgae species and no affect on the growth of other animals and plants in the water. Therefore, the device is important in the field of aquiculture culture, especially industrial culture, and can effectively enhance the content of dissolved oxygen in water, reduce contaminant concentration, add shrimp food supplies, prevent the spread of disease and greatly reduce energy consumption.

The invention discloses a rain water treatment and reuse system. The rain water treatment and reuse system comprises a safe diversion well, a rain water discard machine well, a buried purifying integrated machine and a rain water reservoir in sequence, a rain water discard machine is arranged in the rain water discard machine well, one end of the rain water discard machine well is connected to a rain water collecting pipe of the safe diversion well, a collecting pipeline is connected to the other end of the rain water discard machine well, the collecting pipeline is connected to a collecting pipe on the upper part of one side of the buried purifying integrated machine, a connecting pipe on the lower part of the other side of the buried purifying integrated machine is connected into the rain water reservoir, a PP water storage module is arranged in the middle of the rain water reservoir, and a mud discharge pump and a reuse pump are separately installed in the rain water reservoir on two sides of the PP water storage module. Rain water is collected and diverted through the safe diversion well, then flows into the rain water discard machine to intercept large particulate suspended matters, then enters the buried purifying integrated machine to treat discarded and initially filtered rain water in depth, then treatment reaches the standard before the rain water enters the reservoirwithout secondary upgrade and purification, so that the system operation is more energy saving, and professional management is not required.

The household water purifying installation comprises: a body (1) with inlet and outlet connected to inlet pipe (3) and outlet pipe (4) respectively, a medium (2) in the body (1), an ultrasonic transducer (5) send out 60-300KHz ultrasonic wave and acted on said medium (2), and a power and control system (6). Wherein, the unpurified water flows across the medium (2) through inlet pipe (3) for treatment and flows out from the outlet pipe (4); the transducer (5) ultrasonic cleans the medium at fixed time to restrain the bacteria growth on medium surface. This invention can ensure the fresh and super quality of outlet water.

The invention discloses a rice field automatic irrigation and drainage system based on micro-nano air entrapping. The rice field automatic irrigation and drainage system comprises a water pump and a micro-nano bubble generator, a water inlet of the water pump is communicated with an irrigation water source through a first pipeline, and a water outlet of the water pump is communicated with a water inlet of the micro-nano bubble generator through a second pipeline; a water outlet of the micro-nano bubble generator is communicated to the rice field to be irrigated through a third pipeline; a dissolved oxygen sensor is arranged in the third pipeline, a first electromagnetic valve is arranged on the third pipeline, and the dissolved oxygen sensor and the first electromagnetic valve are respectively connected with a first programmable controller. The invention discloses a rice field automatic irrigation and drainage method based on micro-nano air entrapping. The method comprises the steps that the water pump and the micro-nano bubble generator are started, water in an irrigation water source is pumped into the micro-nano bubble generator, micro-nano bubbles are injected into the water pumped into the micro-nano bubble generator, and water flowing out of the micro-nano bubble generator is injected into the rice field to be irrigated. According to the system and the method, the phenomenon of rice field water quality deterioration after wheat straw returning in the rice-wheat rotation area can be avoided.

The invention belongs to the technical field of aquaculture, and particularly relates to a simulated ecological mixed culture method and system for quasipaa spinosa and acrossocheilus fasciatus. The simulated ecological mixed culture method comprises the following steps that a quasipaa spinosa culture pond is built, a plurality of ditches are built in a culture site, each ditch is provided with a water inlet and a water outlet, each water inlet and the corresponding water outlet are in communication are have a drop, and aquatic plants are planted on both sides of each ditch; cobblestones are laid in the ditches, and polished tiles and / or asbestos tiles are laid on the cobblestones; enclosing walls are built around the quasipaa spinosa culture pond with hollow bricks, wooden frames are built on the enclosing walls, and asbestine nets cover the wooden frames; an air circulation layer is arranged in the middle of the enclosing walls to realize internal and external air circulation of the simulated ecological culture room; culture water is injected into the ditches so as to keep the culture water in the ditches in a flowing state; young quasipaa spinosa and acrossocheilus fasciatus fries are stocked in the ditches; and culture baits are fed, and daily management is performed. According to the simulated ecological mixed culture method disclosed by the invention, the environment of the culture room can be consistent with the natural environment for growth of wild frogs and fishes, and transformation and upgrading of a simulated ecological culture mode are promoted.

The invention discloses a method for culturing loaches. The method includes steps of 1), constructing square culture ponds; 2), disinfecting the culture ponds; 3), breeding bottom water, to be more specific, adding thoroughly decomposed manure and earthworm cast into the culture ponds, inoculating chlorella, cyclotella, cryptophyta and photosynthetic bacteria in the culture ponds and carrying out breeding for 15-20 days; 4), farming lava offspring seeds of the loaches and rotifers in a free-range manner; 5), carrying out raising management. Waterproof walls, waterwheel aerators, blow-down pits, dissolved oxygen detectors and rotifer breeding ponds are arranged in the culture ponds, and the dissolved oxygen detectors are positioned at the bottoms of the culture ponds and are in electric signal connection with electric control switches. The method has the advantages of high culture density, high water self-purification capacity, low sewage discharge, few culture diseases and the like.