276results about How to "Improve the water environment" patented technology

Construction for greening housetop comprises base layer, moisture retention device, and planting layer arranged on the base layer, wherein the moisture retention device is arranged between the base layer and planting layer and contacts with the planting layer partly. The base layer, moisture retention device and planting layer together create a circumstance for steady and long term plant growth like ground. The construction can guarantee normal growth of plants in natural condition especially in bad conditions, and can make full use of nuisanceless natural resources such as rainwater.

A system for growing plants in adverse circumstances is composed of a great container for growing plants in it, the matrix loaded in said great container, and a water storing and controlling unit communicated via water tube with water tank and arranged in said great container for contacting with said matrix.

A biologic organic fertilizer for culturing fish is prepared from ferment bacteria, inorganic N and / or P fertilizer, organic substance (straw, stalk, city garbage, and droppings and dung of fowls and animals), and trace elements chosen from Cu, Fe, Mn, Si, Co, Zn and B through proportional mixing, inoculating ferment bacteria, biologic synthesis, low-temp drying and examining. Its advantages are high growth speed and quality of fish, high effect to improve water quality and low cost.

The invention discloses a construction method of an ecological sewage treatment and water restoration system. The system can be used for the miniature domestic sewage treatment, the aquatic environment rehabilitation of medium and small sized lakes and the landscaping water management and rehabilitation engineering, can achieve the target of building the self-regeneration and self-succession water ecological system and finally building the self-regeneration and self-succession water ecological system, and can build the landscape type sewage treatment plant. The method comprises the following steps: A. building a rainwater conflux and percolation water charging system; B. building an ET biochemical system; and C. gradually building an ecological balanced system of the aquatic animal food chain according to the relationship between the ecological chains of grass-fish, alga-fish, alga-debris-snail and debris-microorganism on the basis of finishing building the ET biochemical system.

The invention discloses a device for ecologically culturing seashell and alga in shallow sea and a method thereof. The device comprises a seashell culture raft and an alga culture raft. The seashell culture raft comprises at least two paralleled floating ropes; buoys are arranged on the floating ropes and are connected with the floating ropes through floating ties; the two ends of each floating rope are fixed by underwater fixing mechanisms; the alga culture raft made by at least one culture curtain is arranged above each two adjacent floating ropes; the adjacent culture curtains are fixed by floating bamboo perpendicular to the floating ropes; and the two ends of the floating bamboo are connected with the floating ties. The device can be used to carry out the hanging culture of the seashell on the floating ropes and carry out the culture of the alga in the culture curtains floating above the floating ropes, thereby realizing the composite culture of the seashell and the alga. The device and the method have the advantages of reducing the culture cost, improving the culture efficiency and culture space utilization factor, and having good effects on the comprehensive use of shallow sea waters, the improvement of the water environment and the prevention and control of diseases.

The invention discloses a gabion box ecological gabion river channel slope protection construction method. The gabion box ecological gabion river channel slope protection construction method is mainly characterized in that the defect that only the flood control function, the water diversion function, the drainage function, the impoundment function, the shipping function and the like of a river channel are often considered according to a traditional river channel slope protection structure, and the ecological function of the river channel is rarely considered is overcome. The gabion box ecological gabion river channel slope protection construction method includes the following steps that a cofferdam is constructed, a worktable is arranged, and a footing construction period is carried out; after gabion slope protection construction is over, gaps between surface course dimension stone are recharged with soil and watered, it is ensured that the gaps of dimension stone are filled with soil, and a dimension stone slope is covered by a layer of cultivating and planting soil; aquatic plants are planted underwater, and a lawn is planted on a bank of the river channel. According to a construction technology, water, cement and a formwork are not needed, and construction is convenient. The gaps between building stone can be manually or naturally filled with mud on earth, root systems of the plants can be deeply pricked into the slope through the mud between the building stone, so that engineering measures are combined with vegetation measures, and a soft overall protection face is formed. The requirements for water and soil conservation and environment greening are met, and therefore the original ecological environment is recovered.

The invention discloses a device and a realization method capable of efficiently recycling aquiculture. The device comprises a plant growing floating bed, a microbial cultivation middle layer and a bottom layer sounding board, wherein the plant growing floating bed is arranged on a water surface and can absorb excrement of fishes, nitrogen and phosphorus in water; the microbial cultivation middle layer is arranged in water below the plant growing floating bed and can purify sewage; and the bottom layer sounding board is arranged below the microbial cultivation middle layer, is matched with the microbial cultivation middle layer and effectively degrades various contaminants in the sewage. The device and the realization method capable of efficiently recycling the aquiculture have good water purifying effect and low cost in the aquiculture, well take advantages of a large amount of harmful substances, ammonia and hydrogen sulfide generated in the water, improve the digestibility of aquatic products, reduce diseases and death rate, and improve the growth rate and meat quality of the aquatic products.

The invention belongs to the technical field of agricultural fertilizers, and particularly discloses a nitrogen-fixing microorganism compound fertilizer and a preparation method. The nitrogen-fixing microorganism compound fertilizer comprises polypeptide urea, a phosphatic fertilizer, polypeptide chelating potassium, a compound microorganism agent, a polypeptide compound, a soil conditioner, a medium trace element compound and a nutrition agent; the compound microorganism agent contains nitrogen-fixing bacteria, phosphate solubilizing and potassium solubilizing bacteria, photosynthetic bacteria, probiotics and adsorbate. The preparation method disclosed by the invention comprises the steps of preparing compound microorganism agent fermentation liquor, mixing the fermentation liquor with the adsorbate uniformly and preparing the compound microorganism agent and a microorganism envelope complex agent successively; mixing the microorganism envelope complex agent, a humic acid envelope organic fertilizer and a polypeptide envelope inorganic fertilizer uniformly, under the action of an electric field and a magnetic field, adding medium trace elements, spraying bone glue, and preparing nitrogen-fixing microorganism compound fertilizer particles. The compound fertilizer disclosed by the invention has the effects of adjusting nutrients, stimulating crop growth, improving the agricultural product quality, increasing yield and efficiency, preventing insect diseases, increasing soil fertility, loosening and improving soil quality and the like.

The invention relates to a combined ecological floating bed device for using a microbial fuel cell to purify lake water. The combined ecological floating bed device for using the microbial fuel cell to purify the lake water comprises a combined ecological floating bed and the microbial fuel cell, wherein the combined ecological floating bed comprises a surface aquatic plant unit, a middle aquatic animal unit and a lower artificial medium unit from the top to the bottom; the aquatic plant unit consists of aquatic economic plants (1) and a conductive material (2) for fixing the aquatic plants; the aquatic animal unit is used for aquaculturing predatory aquatic animal shellfish (3); in the artificial medium unit, an active carbon nanoparticle artificial medium (4) is enriched with a great number of microbes to form a high-efficiency biomembrane purifying area; the combined ecological floating bed device for using the microbial fuel cell to purify the lake water is characterized in that the conductive material (2) is led out of the device through a conductive wire (5) to form an air cathode electrode of the microbial fuel cell. The combined ecological floating bed device for using the microbial fuel cell to purify the lake water can improve the water quality fundamentally and can recycle energy, and is applicable to large-scale, modeled and mechanical work.

The invention discloses a live fish conveying vehicle. At least a pair of live fish tanks is disposed in the carriage of the conveying vehicle. Each pair of the live fish tanks is provided with a circulating pump and a filter. An oxygen filling machine of the conveying vehicle continuously fills oxygen to each live fish tank. A monitoring system can monitor the oxygen content in each live fish tank through oxygen probes. Each live fish tank is in contact with a cold water pipe. The monitoring system controls a code water machine to operate. A temperature sensor is disposed in each live fish tank. The live fish conveying vehicle has the advantages that the water in each live fish tank can circulate through the filter, waste and metabolite in water can be filtered, the monitoring system can monitor the oxygen content in each live fish tank can be monitored through the oxygen probes, oxygen can be filled into the live fish tanks through the oxygen filling machine, an auxiliary oxygen filling machine and a liquid oxygen storage tank, the water environment in the fish tanks can be continuously improved for a long term, and the oxygen level for living of the live fish can be maintained.

The invention discloses a shallow lake group water quality, water quantity and water ecological coupling scheduling analysis method. The method comprises the following steps of 1) collecting researcharea data; 2) establishing a shallow lake group hydrodynamic model; 3) constructing a shallow lake group water quality model; 4) coupling of a hydrodynamic water quality model; 5) constructing a shallow lake group water ecological model; 6) constructing a shallow lake group hydrodynamic water quality and water ecological coupling model; 7) carrying out the parameter calibration of the model; 8) scheduling and analyzing. According to the analysis method, the regional water environment treatment scheme of water quality, water quantity and water ecological coupling dispatching is considered fromthe perspective of the whole lake group, the shallow lake group is dispatched, and the self-cleaning capacity of lake group water bodies can be utilized to reduce the pollutant concentration of a heavy pollution region to the maximum extent.

The invention relates to a precise control method of sewage treatment plant aeration total quantity. The method includes: a water inlet COD instrument, a water inlet ammonia nitrogen online monitor, a water inlet flowmeter, a dissolved oxygen online monitor, a water outlet ammonia nitrogen online monitor, a central PLC and a plurality of blowers are disposed, the water inlet COD instrument, the water inlet ammonia nitrogen online monitor, the water inlet flowmeter and the dissolved oxygen online monitor are parallelly connected with the water outlet ammonia nitrogen online monitor and then connected with the central PLC, and the central PLC is connected with the blowers; the central PLC respectively collects four kinds of variable signals of water outlet ammonia nitrogen, DO values, water inlet COD and ammonia nitrogen, and water inlet quantity, the four kinds of variable signals are different in significance and are associated, the various signals have independent adjusting periods, and a precise control system using the central PLC to control and adjust the total air quantity of the blowers is formed. The method has the advantages that aeration quantity is saved, influence of the faults or measuring errors of a single instrument to a system judging result is weakened greatly, and stable operation of the whole system is guaranteed.

The invention relates to the technical field of aquatic product aquaculture, in particular to a phycomycete water prawn circulating aquaculture system. The system comprises an aquaculture pond and a water treatment device, wherein a roof which is provided with an illumination intensity adjustable facility and covers the upside of the aquaculture pond is arranged above the aquaculture pond; the pool bottom of the aquaculture pond is gradually inclined from the periphery to the middle; a drainage port is formed in the middle of the pool bottom; an aquaculture area of the aquaculture pond is 400-1,000m<2>; the aquaculture pond is a circle or a chamfered square; the water treatment device consists of a water outlet well, a filter groove, a water return well, a circulating water pump and foam air floatation towers sequentially; the drainage port is connected with the water outlet well by a pipeline; the water outlet well is sequentially connected with the filter groove, the water return wall and the circulating water pump; the circulating water pump is connected with the foam air floatation towers by pipelines; and the foam air floatation towers are connected with tangent water distribution pipes arranged at the periphery of the aquaculture pond by pipelines. The system has the characteristics of low cost, low energy consumption, automatic purification, high yield and the like, and can be widely applied to the industry of intensive aquaculture.

The invention provides a multifunctional microorganism organic fish guano. According to a prescription, the multifunctional microorganism organic fish guano comprises the following components in percentage by weight: 25 to 30% of high-protein organic matters, 2 to 5% of compound microorganism bacteria, 8 to 10% of amino acid, 5 to 8% of fulvic acid salt, 25 to 30% of inorganic nitrogenous fertilizer, 15 to 20% of inorganic phosphate fertilizer, 2 to 4% of inorganic potassium fertilizer, 0.5 to 2% of trace elements, and 3 to 6% of zeolite powder; the high-protein organic matter are mainly prepared from poultry excrements, agricultural wastes and rot promoting bacteria by the fermenting process. The preparation method is characterized in that the components as shown in the prescription are overturned and fermented, uniformly mixed, crushed and sieved to prepare the fish guano. The fish guano brings complete and rich nutrition for fish, inhibits fish diseases, improves water quality as well as increases dissolved oxygen in water.

The invention discloses a Cherax quadricarinatus cultivation method, comprising the steps of crayfish pond selection, pond sterilization, water cultivation, fry adding, feed adding and crayfish pond management. By applying biological fertilizers in a water body to improve the quality of the water body, it is possible to fertilize the water quickly and also increase dissolved oxygen in the water body, providing a good water body environment for Cherax quadricarinatus; the feed for Cherax quadricarinatus is rich in nutrition and is good in palatability such that body weight of Cherax quadricarinatus increases quickly, and individual weight of adults of Cherax quadricarinatus is 1.5-2 times the body weight of common members of Cherax quadricarinatus; in addition, for traditional Chinese medicine additives in the feed, synergy of the traditional Chinese medicine components is given to full play by making use of the monarch, minister, assistant and guide compatibility theory in traditional Chinese medicine, antibacterial and anti-inflammatory, heat-clearing and toxin-removing and immunity-improving effects can be achieved, the adjustment for body balance and intestinal ecological environment of Cherax quadricarinatus can be significantly improved, survival rate of Cherax quadricarinatus is up to 91.5-93.6%, no medicine residue occurs, and health and safety are ensured.

Belonging to the field of microbial agents and fertilizers, the invention specifically relates to an Enteromorpha microbial agent suitable for the demands of planting, livestock and poultry, aquaculture, sewage treatment and other fields, and further discloses a preparation method of the microbial agent. The Enteromorpha microbial agent provided by the invention employs Enteromorpha to prepare a slurry, and is compounded with Streptomyces microflavus, Lactobacillus casei, bacillus subtilis, rhodopseudomonas palustris, Pichia membranaefaciens and other main beneficial microbial floras, and has the multiple functions of effectively improving agricultural product quality, effectively lowering the cost of animal and plant growth period, increasing agricultural product output and the like. The microbial agent also has the functions of purifying water, removing hydrogen sulfide and other odors from sewage, garbage and livestock raising housings, and improving the environment, etc.

The invention discloses a water body antidote in the field of freshwater aquaculture and a preparing and using method thereof. The antidote is prepared by mixing a carrier material, an adsorbent, traditional Chinese herbs, organic acid and a metal-chelator. Under the combined effect of the adsorbent, active ingredients of the traditional Chinese herbs, the organic acid and the metal-chelator, the water body antidote can be used for decolorizing, deodorizing, softening, clarifying, sterilizing and detoxifying a water body, so that the water body can be clarified, foreign odors can be eliminated, dissolved oxygen can be increased, harm of heavy metal ions and pathogenic bacteria to aquatic products can be relieved, the survival rate of young aquatic animals can be improved, and development of the fresh water aquiculture industry can be promoted.

The invention discloses probiotic solid powder and a preparation method thereof. The probiotic solid powder comprises a mixture of active probiotics and active zeolite, wherein the active probiotic content is between 12 and 50 billion colony-forming units (CFU) / gram; and the active zeolite mixture comprises the following components in percentage by weight: 30 to 50 percent of zeolite, 20 to 40 percent of attapulgite clay and 10 to 30 percent of bentonite. The probiotic solid powder provides a high-quality and low-cost antibiotic substitute product for livestock breeding; and the probiotic solid powder with 1 to 4 million CFU of live bacteria is added into each gram of feed, so the growth speed of chickens, pigs and fish can be improved by 2.0 to 15.6 percent, the conversion rate of the feed can be improved by 1.1 to 9.3 percent, and the diarrhea rate and the death rate of animals can be reduced obviously. The preparation method of the probiotic solid powder is simple, has low cost andcan reduce environmental pollution; and the content of the obtained product bacteria is high.

The invention belongs to the technical field of ecological restoration and particularly relates to a water body ecological restoration method. The water body ecological restoration method comprises the steps that the water surface is cleaned, then submerged plants, emergent aquatic plants and floating-leaved plants are planted, and aquatic animals are put in. According to the water body ecological restoration method, sludge at the water bottom is treated with a plant blanket in-situ coverage method, root systems of the emergent aquatic plants are fixed with pollution-free clay, and a putting-in type planting method is adopted for the floating-leaved plants and the emergent aquatic plants. The aqueous plants can provide an adhesion symbiotic space for microorganisms, and provide a food source for aqueous animals, fish and shellfish are put in when the aquatic plants grow stably, and a rapid and simple water body forest system is formed. By means of the water body ecological restoration method, the effects of fixing sludge at the water bottom, restoring the natural ecological environment and maintaining the water to be clear permanently can be achieved; meanwhile, a dwelling site can be provided for fish and birds, and certain river landscape can be formed.

The invention discloses a process for producing modified starch by using a microwave far infrared method, comprising the following steps of: uniformly mixing starch with an oxidant, an acid / base catalyst, an etherifying agent and a esterifying agent, placing the mixture into microwave far infrared integration equipment for heating reaction, carrying out neutralization reaction and physical synergism, and finally sieving, weighting and packing. The invention has the advantages of high heating reaction speed, thorough reaction, good film-forming property, high bonding, enhancing and retaining ratio, low cost, wide application range, low energy consumption, no pollution to environment and scale production. The modified starch produced by the invention can be widely used as a binder, an intensifier, a stabilizer, a densifier and the like to be used in the industries of paper making, spinning, food, medical treatment, plastic, well drilling, building materials, daily chemicals and the like.

The invention discloses a floating type device integrating wave dissipation and offshore culture, and belongs to the field of comprehensive utilization of structures of coastal engineering. The floating type device comprises wave dissipation units with a net cage function, a floating type wave prevention box and an anchoring structure, and is characterized in that each wave dissipation unit consists of a basic block body, an artificial rigid plant and a net cage type wave dissipation drum; the wave dissipation units are fixedly embedded into the wave prevention box by the basic block bodies and are spliced with one another to form an integrated structure; the whole device floats on a sea surface and is fixed at the seabed through anchor chains. By the combination of three functions of wave dissipation of the floating type wave prevention boxes, revetment of the rigid plants and offshore culture, the floating type device integrating wave dissipation and offshore culture is provided. Due to the design, the wave dissipation performance of the floating type wave prevention boxes can be improved, and good conditions are provided for offshore culture.

The invention provides a carbon-based material and a preparation method thereof. The preparation method comprises the following steps: step 1, mixing starch and water according to a mass percentage ratio of 1:(1-1.5) to obtain a primary material; step 2, carrying out freeze drying on the obtained primary material at a temperature of from -50 DEG C to-70 DEG C for 20-50 hours; step 3, carrying outhigh-temperature carbonization on the material obtained in the step 2 to prepare a carbon foam substrate; and step 4, soaking the carbon foam substrate prepared in the step 3 into a dopamine solutionfor 24-48 hours, then carrying out drying at room temperature to obtain the dopamine-deposited carbon foam substrate. The carbon-based material prepared by mixing the starch and the water is a naturalporous structure formed after a flour sample is carbonized, and the structure has special significance for interfacial photo-thermal conversion.

The invention provides a grass carp expanded pellet compound feed. The grass carp expanded pellet compound feed is a feed product which is mixed by energy feed raw material, protein feed raw material, mineral feed raw material, vitamin feed raw material and additive according to a certain ratio through superfine crushing and expansion processing, and is directly fed to grass carps. The grass carp expanded pellet compound feed comprises the following raw materials in parts by weight: 22 parts of bean pulp, 11 parts of rice bran, 31.5 parts of rapeseed meal, 1.5 parts of monocalcium phosphate, 20 parts of wheat, 11 parts of cottonseed meal, 1 parts of soybean oil, and 2 part of compound premix, wherein the premix comprises minerals, vitamins and additives. The grass carp expanded pellet compound feed has the advantages that after the health culture is performed, the cultured grass carp has natural body color, uniform body, tender meat and stress-resistant and transportation-resistant properties; the bait coefficient is low, and the economic benefit is high; the culture cost of grass carp is reduced, the labor is saved, the waste is reduced, the growth speed is accelerated, the disease is reduced, the culture benefit is improved, the resource is saved, and the culture environment is protected.

The invention discloses a high-yield disease-resistant loach breeding feed and a making method thereof. The high-yield disease-resistant loach breeding feed comprises the following raw materials in parts by weight:10-15 parts of peanut meal, 10-15 parts of soybean meal, 8-10 parts of carrot root powder, 8-10 parts of powder of radix rosae multiflorae, 5-7 parts of spirulina powder, 10-12 parts of powder of radix et rhizoma rhei, radix scutellariae and cortex phellodendri, 15-20 parts of corn flour, 13-15 parts of sorghum flour, 13-15 parts of unhulled rice powder, 10-12 parts of peanut powder, 7-9 parts of soybean protein powder, 7-8 parts of rapeseed meal powder, 20-25 parts of fish meal, 18-20 parts of shrimp powder, 15-17 parts of silkworm chrysalis meal, 5-8 parts of pig's blood powder, 8-10 parts of fly larva powder, 5-8 parts of a nutritive mixture, 5-7 parts of composite multi-minerals, 8-10 parts of a Chinese herbal medicine additive, and 3-5 parts of table salt. In a formula of the loach breeding feed, materials are pollution-free substances, and are green and environmental-friendly, so that the loach breeding feed is an ecological environmental-friendly green feed. According to loaches fed with the feed, the disease resistance is obviously improved, the survival rate is greatly increased, the loaches are high in reproduction speed, the yield is also increased, the discharge of hazardous substances is reduced, and stability of water quality is maintained, favorable water body environment of the loaches is guaranteed, and the healthy growth of the loaches is promoted.

The invention discloses a preparation method of a bioactive carbon fiber. The preparation method comprises the following steps: (1) adopting a multiple temperature zone gradient heating method to pre-oxidize polyacrylonitrile fibers for 30 to 150 minutes at a temperature of 150 to 300 DEG C; (2) adopting a multiple temperature zone gradient heating method, subjecting the pre-oxidized polyacrylonitrile fibers to a carbonization treatment for 10 to 30 minutes at a temperature of 600 to 1300 DEG C; and (3) through an active modification method, subjecting the carbonized fibers to a surface activation treatment for 3 to 10 minutes to obtain the bioactive carbon fiber. An active modification method is used to carry out a surface activation treatment on carbonized fibers, the furnace body cannot be damaged easily, the continuous surface treatment of active carbon fiber can be realized; a large amount of acidic or alkaline active groups are generated on the fiber surface, the hydrophilic property is enhanced, the absorption performance is strengthened, the provided bioactive carbon fiber can be used to process sewage; in the presence of a catalyst, multiple organic pollutants in sewage can be chemically adsorbed by the bioactive carbon fiber, and the water quality is improved.

The invention discloses an artificial wetland and a construction method thereof. The artificial wetland comprises an artificial wetland pool, a layer of oyster shells serving as a filler are arranged in the artificial wetland pool, and aquatic plants are grown on the oyster shells. Therefore, compared with the artificial wetland taking sand as a filler in the prior art, the artificial wetland has the advantages that: (1) the oyster shells serve as the filler, wastes are utilized, the filler is wide in sources, low in cost and high treatment efficiency, high porosity ensures smooth flowing of water and avoids blockage, and the service life is long; and the artificial wetland is generally dredged once after 2 to 3 years, and about 1 / 3 of oyster shells are replaced, so the operation and management are convenient, the plants are easy to grow and kept, and the plants can be partially harvested according to growth vigor; (2) the artificial wetland has good purification effect without odor, and a few of flies and mosquitoes appear; and (3) the artificial wetland purifies and beautifies environment.

The invention provides a circulating aquaculture system for eel fertilized egg hatching and fry culture. The system comprises circulating water treatment facilities and at least one incubator, wherein the circulating water treatment facilities comprise a water storage pond, a main water inlet pipe, a main water outlet pipe and a filtering pond, a first water pump is arranged in the water storage pond, a second water pump is arranged in the filtering pond, the incubator comprises a machine body, a water inlet mechanism, a pollutant discharge mechanism, a water injection mechanism and a water drainage mechanism, the water inlet mechanism, the pollutant discharge mechanism, the water injection mechanism and the water drainage mechanism are arranged on the machine body, the water inlet mechanism and the water injection mechanism are communicated with the main water inlet pipe through pipelines, the water drainage mechanism is communicated with the main water outlet pipe through a pipeline, and the lower portion of the pollutant discharge mechanism is connected with a pollutant discharge groove. The invention further provides a use method of the circulating aquaculture system for eel fertilized egg hatching and fry culture. The circulating aquaculture system for eel fertilized egg hatching and fry culture and the use method of the system are easy and efficient, large-scale hatching can be achieved in small space, and hatching efficiency is high.

The invention discloses a high-yield method for breeding freshwater shrimps in a greenhouse in winter, belongs to the field of aquaculture, and relates to winter breeding biology of the freshwater shrimps and a high-yielding breeding method in the greenhouse. The high-yield method for breeding freshwater shrimps in a greenhouse in winter includes the following water environment control and feeding management techniques: constructing the plastic greenhouse above a freshwater shrimp breeding pond; cultivating aquatic plants in the breeding pond to optimize water quality; putting young freshwater shrimps in the pond at appropriate time; constructing an aeration system for continually oxygenating; pouring pellet feed in the pond and adding chilled fish blocks; catching the big freshwater shrimps and leaving the small freshwater shrimps in the pond to be bred. It solves such technical problems that the freshwater shrimps are rarely grown in winter, the specifications of the products are small and the proportion of the big freshwater shrimps is small. The method and the techniques are feasible. By taking the advantages of the temperature increasing and thermal insulation properties of the sunlight aquatic greenhouse, the growth temperature-adaptation period is prolonged, and the use efficiency of idle winter greenhouses is improved. The techniques are firstly put forward in the field of domestic freshwater shrimp farming, are convenient to use for aquaculture enterprises and farmers, and have broad prospects.

The invention discloses a method for biologically treating cadmium-containing wastewater, and belongs to the field of water treatment. The method comprises the following steps: (1) producing a biological active carrier filler through concentrated sulfate reducing bacteria and an inorganic hydrophilic material utilizing a bacteria embedding immobilization technology, and directly filling the filler into an anaerobic biofilter; and (2) feeding the wastewater containing cadmium ions and sulphate ions into the biofilter, reducing hexavalent sulfur in the SO4<2-> into S<2-> through the sulfate reducing bacteria, combining cadmium with sulfion to form insoluble substances of cadmium sulphide, and thus removing cadmium. The raw wastewater passes through the biofilter, and cadmium in the produced water is less than 0.1mg / L, so that the national cadmium discharge requirements of Wastewater Quality Standards for Discharge to Municipal Sewers (CJ343-2010) are satisfied. The method has the advantages of high removal rate, stability in system operation, no secondary pollution and simplicity in operation. By utilizing the method, a heavy metal pollution problem can be effectively solved, and the method has an important practical meaning in cadmium-containing wastewater treatment and water environment improvement.

The invention discloses a co-culture pond for juvenile giant salamanders. The co-culture pond for juvenile giant salamanders comprises a plurality of unit ponds communicated with one another. Each unit pond has a gradient of 10-15 degrees with horizontal plane. A gate is arranged between each two adjacent unit ponds. The lateral side of each unit pond is provided with a water outlet connected with a right-angled bend. The co-culture pond for juvenile giant salamanders is novel and unique in design, provides a fine natural water simulated water environment for growth of the juvenile giant salamanders, can discharge food residue and excrement timely, is convenient for transfer management, and shaded growth environment and sufficient oxygen supply are guaranteed.