47results about How to "Ecological environment is stable" patented technology

The invention discloses a manufacturing method of a high-strength bioactive porous scaffold. According to the manufacturing method, process parameters in a printing process are controlled by using a three-dimensional printing device so as to extrude out bio-ink with bioactivity, ordered porous scaffolds with completely through pore passage structures are obtained by virtue of layer-upon-layer accumulation as the high-viscosity bio-ink has a self-supporting characteristic, and then the high-strength bioactive porous scaffold is obtained by virtue of a bio-glass assistant sintering process. The manufacturing method uses the three-dimensional printing device to set printing parameters randomly and control the size, shape, pore diameter and pore shape of the scaffold so as to obtain a required scaffold structure; and meanwhile, by virtue of an optimized sintering process, the scaffold still has high mechanical strength under the condition that the porosity is high. The manufacturing method disclosed by the invention is simple in operation and low in cost, and the manufactured high-strength bioactive porous scaffold can be well applied to bone tissue repair.

The invention discloses a closed-type constant-temperature multi-layer water circulation turtle cultivation system which comprises a multilayer turtle cultivation pool devices, a cultivation water environment adjusting device, an indoor air environment adjusting device and a cultivation system operation control device, wherein the multilayer turtle cultivation pool device comprises a plurality of turtle cultivation pools, circulating water return pipes, circulating water outlet branch pipes and main circulating water outlet pipes, primary solid liquid precipitation devices, blow-down valves and pollution discharge blow-down pipes; the cultivation water environment adjusting device comprises a solid-liquid separator, a blow-down valve, a sterilizer, a protein separator, a biological filtering device or tank, a circulating pump and a water heating device; and the indoor air environment adjusting device comprises an air heating device, an air oxygenating device and an insulation building. According to the closed type constant-temperature multi-layer water circulation turtle cultivation system, turtle cultivation environments can be comprehensively controlled, the land, the water and the energy are saved, an optimal ecological environment suitable for turtles to rapidly grow is established, turtle cultivation is free of drugs, and healthy and safe food sanitation requirements are met.

The invention discloses a bacillus amyloliquefaciens D2WM as well as a preparation method and application of bacillus amyloliquefaciens D2WM. The bacillus amyloliquefaciens D2WM comprises the steps of A, bacillus separation and purification, namely collecting after inoculating a slope; B, preliminary screening of bacillus, namely sequentially selecting strains having antagonistic effects on Erwinia and camellia oleifera diseases by using a point connection method and a plate confrontation method; and C, secondary screening of bacillus, namely culturing the preliminarily-screened strains with the antagonistic effects in an LB liquid culture medium by using a cup-plate method, and screening the strains simultaneously having the antagonistic effects on main diseases of Erwinia and camellia oleifera through an antagonistic bacterium fermentation liquid and sterile filtrate. When being applied to preparation of drugs for treating or preventing soft rot of vegetables and camellia oleifera diseases, the bacillus amyloliquefaciens has a broad-spectrum antagonistic effect, high in growth speed, capable of efficiently antagonizing anthracnose of camellia oleifera, leaf spot diseases of camellia oleifera, black spot of camellia oleifera, canker of camellia oleifera and various diseases and remarkable in antibacterial effect, the culture time for general bacteria and fungi is greatly shortened, and the production cost is reduced.

The invention discloses a method for improvement and protection of a spur dike channel of a mountain river. The method comprises the steps that (1) the channel improvement water level and the channel improvement line width are determined according to the direction of the channel, the planned line form, the hydrological characteristics of the river, the riverbed components and the erosion and deposition evolution characteristic, and (2) the position and the length of a spur dike are determined according to the shipping hindering characteristic of a dangerous shoal and the improvement line width. The method for improvement and protection of the spur dike channel of the mountain river is characterized by further comprising the steps that (3) a dike body structure is laid, wherein a layer of block shaped like the twisted Chinese character 'Wang' is laid on the downstream slope of a dike body; (4) the bottom of the head of the dike is protected; (5) the bottom of the root of the dike is protected; (6) a bank protection structure is arranged. The method is particularly suitable for improvement and protection of the spur dike channel of the mountain river, the strength of the root of the dike and the strength of the head of the dike can be improved, stronger current impact force can be resisted, the overall service life is prolonged, and the method has the advantages of being capable of preventing sediment accumulation, stabilizing a riverbed, protecting the ecological environment and achieving safe flood discharging.

The invention discloses a prawn ecological water quality modifier which is characterized in that: prawn ecological water quality modifier is prepared by taking the activated shuck powder as a carrier and the high-activity secondary metabolism product medicine extracted from the fermentation liquid of Chinese herbal medicine as active ingredient. The prawn ecological water quality modifier disclosed by the invention has the advantages of simple preparation method, low cost and strong disease resistance, maintains stability of the ecological environment of prawn pond, and avoids pollution.

The invention discloses a processing method of a novel cashmere-like fabric. The processing method comprises the following steps of raw material selecting, spinning, yarn space dyeing, weaving, post-finishing and finished product packaging. According to the method, dyed wool and space dyed diamond velvet yarn are interwoven, the diamond velvet yarn does not have feltability, longitudinal creases are formed due to the feltability of the wool, and a visual transverse crease effect is formed after the diamond velvet yarn is subjected to space dyeing. The matching style is novel and unique, and the style of a common knitted fabric is fundamentally changed; the surface of the fabric is raised by using a light pilling process during post-finishing, the style characteristic to be expressed on the surface of the fabric is not covered, colors are regular, the texture of the fabric surface is irregular and creased, and the hand feeling of the novel high-grade fabric is close to that of cashmere.

The invention relates to the field of aquatic animal breeding, and provides an aquatic animal breeding system. The aquatic animal breeding system comprises a breeding pond, a settling pond, a filter pond and a water pump. The bottom of the breeding pond is inclined from the periphery to the center. The breeding pond and the settling pond are connected through a pollution collecting pipe. The end, connected with the breeding pond, of the pollution collecting pipe is located in the center of the bottom of the breeding pond. The end, connected with the settling pond, of the pollution collecting pipe is vertically arranged. One or more pollution absorption grooves are formed in the end, connected with the breeding pond, of the pollution collecting pipe. A partition plate is arranged between the settling pond and the filter pond. The aquatic animal breeding system has the advantages that water pressure is utilized, the effect of pollution removal and separation of the breeding pond can be achieved by opening the water pump, the purpose of cleaning the bottom of the pond even in the breeding cycle can be achieved, breeding pollutant residues in the pond are reduced, the water changing frequency is reduced, and manpower and material resources are saved.

The invention discloses a weeding moisturizing material, a weeding moisturizing cloth and a preparation method. A weed killer is loaded on a non-woven fabric with polyethylene terephthalate (PET) as a raw material and composited with a super absorbent resin to form the weeding moisturizing material; according to the weeding moisturizing cloth, a bottom layer is a non-woven geotextile fabric, an upper layer is the non-woven fabric which is loaded with the weed killer and uses the PET as the raw material, a middle layer is the super absorbent resin, and the three layers are punctured and composited to form the weeding moisturizing cloth; and the preparation method of the weeding moisturizing cloth includes that the PET is spun into as-spun fibers, the obtained as-spun fibers are drafted and subjected to air flow spinning jet to form a fiber mesh, the obtainer fiber mesh is subjected to punching strengthening, an aqueous solution of weed killer is sprayed on the surface of the fiber mesh, the fiber mesh is dried to obtain the non-woven fabric which is loaded with the weed killer and uses the PET as the raw material, and the obtained three materials of the non-woven fabric, the super absorbent resin and the non-woven geotextile fabric are punctured and composited to form the weeding moisturizing cloth. The weeding moisturizing material and the weeding moisturizing cloth have the advantages that the weeding and moisturizing effects are good, the seedling raising costs are lowered, the weeding moisturizing material and the weeding moisturizing cloth are environment-friendly, and water and soil can be conserved. The preparation method of the weeding moisturizing cloth is simple, low in costs and capable of achieving massive industrialized production.

The invention discloses penicillium oxalicum, a preparation method and an application thereof. The preparation method comprises the following steps: A) antagonistic fungi separation and purification: taking a healthy Camellia oleifera rhizosphere sample, adding the sample in a bottle filled with sterile water and glass bead, oscillating the bottle under a shaking table to prepare a fluid suspension; B) primary screening: employing a plate confrontation for screening the fungi for antagonism of Camellia pathogen, placing a pathogen cake and an antagonistic fungi cake on a flat center line, respectively keeping distances to the flat center by 1.5 cm, after constant temperature culture, screening the strains with a bacteriostasis diameter being greater than 8mm, and C) secondary screening: culturing the strains through primary screening by a liquid medium, centrifuging the strains and removing thallus, taking an aseptic filtrate and a disinfected PDA solid medium and mixing the aseptic filtrate and the disinfected PDA solid medium uniformly, pouring on plate, inoculating the Camellia pathogen cake to the center of the flat, and obtaining the strain penicillium oxalicum with strongest antagonistic action. The invention also provides an application of penicillium oxalicum for treating or preventing and treating oil camellia diseases, and the penicillium oxalicum has more than 90% of a bacteriostasis rate on a plurality of diseases such as oil tea anthracnose, oil tea canker and black spot.

The present invention provides a fly maggot application as the feed of prawn and turtle culture; the fly maggot is taken as the only feed for prawn and turtle culture. The fly maggots comprise live one, dried one, frozen one and fly maggot powder. Other feeds or additive which accounts for 10 percent of the sum can be added besides fly maggot; the growing time of prawn and turtle can be shortened by 20 to 30 days with the fly maggot as the feed compared with the growing time when people only throw feed for feeding prawn and turtle. At the same time, the disease incidence is reduced and survival rate is increased; no pollution is caused and the environmental performance is good. Prawn and turtle like the thrown fly maggots and the feeding time is fast without residue and water pollution; in addition, the disease resistance of prawn is strong. The immunity and activity are both greatly promoted which promotes the growing. The fly maggot contains a plurality of high-activity digestive enzymes and can produce a plurality of vitamins and unknown growing factors which can help shrimp digest and absorb. In this way, the cleanness and eco-environment at the bottom of the pond can be kept relatively stable and the finished products of prawn are all green food.

The invention relates to a biocontrol strain KMXU22 capable of preventing and treating soft rot of konjak and an antibiological inoculant of the biocontrol strain KMXU22, and belongs to the technical field of biopesticide. The preservation number of the strain KMXU22 provided by the invention is CGMCC NO. 6597. The antibiological inoculant is obtained by the following steps of: transplanting the strain KMXU22 into a test tube, carrying out one-cycle activation, and culturing for 48 hours at the temperature of 32 DEG C, wherein LB liquid culture medium in the test tube contains 10g / L tryptone, 5g / L yeast extract and 5g / L sodium chloride, and the pH value is 7.0; transferring an activated bacterial lawn into 600ml of LB culture solution which is filled in a 1000ml conical flask and has the same formula as a., and culturing for 72 hours under the conditions that the rotating speed is 120r / min and the temperature is 32 DEG C, so that zymogeneous bacteria solution is obtained; inoculating the zymogeneous bacteria in a seed tank in the ratio of 1: 200 by inoculation amount, and fermenting for 18-20 hours at the temperature of 32 DEG C, so that fermentation seed strains are obtained; and inoculating the fermentation seed strains into a fermentation tank in the ratio of 1: 20 by the inoculation amount, fermenting for 72-96 hours at the temperature of 32 DEG C, and storing the fermented seed strains as the antibiological inoculant when strain content is more than 2*10<10>-2*10<11> CFU / ml and the pH value is 7.0-7.6. The antibiological inoculant provided by the invention has the advantages that cost is low, no position or pollution is produced, and biocontrol effect is good.

The invention relates to an ecological geotube submerged breakwater which comprises ecological geotubes, filled woven bags and protection blankets. The protection blankets are laid on a riverbed parallel with a dike dam of a river bank, the ecological geotubes and the filled woven bags are filled with sand and soil, each protection blanket is provided with three ecological geotubes shaped like a Chinese character 'pin', the ecological geotubes axially adjacent in an end-to-end mode are stacked in an end-to-end staggered connection mode, and the filled woven bags are stacked in seams among the three ecological geotubes of each protection blanket. The ecological geotube submerged breakwater can resist repeated impact of water currents, wind and waves for a long time, the ecological ecotubes are filled with sand and soil and are stacked, the submerged breakwater which is high in strength, quality and density and not prone to collapsing can be formed, relatively stable ecological environment of plants in a water body of the river bank can be maintained, influences of the wind and waves on the plants in the water body of the river bank are reduced, and underwater conditions are stabilized. Meanwhile, due to the stacking method, needed materials are simple, the stacking efficiency is high, and the stacked submerged breakwater can resist erosion of wind, waves and water currents and is not prone to deforming and collapsing and high in operability.

The invention discloses a high-yield and disease-resistant turtle feed. The high-yield and disease-resistant turtle feed comprises the following raw materials in parts by weight: 20-30 parts of extruded soybeans, 0.5-1.5 parts of calcium dihydrogen phosphate, 0.1-0.2 part of choline chloride, 0.5-0.8 part of acid-base buffer sodium bicarbonate, 0.2-0.5 part of composite bacillus preparation, 0.5-1 part of sodium butyrate, 30-40 parts of fish meal, 30-40 parts of bovine liver powder, 10-15 parts of mussel powder, 10-15 parts of fermented soybean meal, 3-6 parts of beer yeast, 2-4 parts of wheat gluten, 2-4 parts of decavitamin, 1-3 parts of compound mineral salt, 0.5-0.8 part of antioxidant, 5-10 parts of lecithin, 10-15 parts of hydrolyzed animal protein and 1-3 parts of milk powder. The high-yield and disease-resistant turtle feed disclosed by the invention is comprehensive in nutrition and can be used for effectively reducing the turtle morbidity, and thus the turtle yield is high.

The invention relates to pseudomonas putida. The pseudomonas putida WH-B3 (Pseudomonas putida WH-B3 ) is preserved in the China Center for Type Culture Collection (CCTCC) with the preservation numberbeing CCTCC M 2019048. The invention provides a preparation method of a microbial bacterium and microbial preparation containing the pseudomonas putida, and provides an application method of the microbial preparation to degrading benzoic acid and alleviating peach continuous cropping obstacles. The pseudomonas putida Pseudomonas putida WH-B3 disclosed by the invention has extremely high degradation capacity on benzoic acid, the degradation efficiency of the pseudomonas putida on 500mg kg<-1> benzoic acid in soil in 24 hours can reach 99% or above, degraded products are non-toxic, and the pseudomonas putida has favorable development and application prospects.

The invention belongs to the technical field of resource utilization of solid waste, and particularly relates to a method for treating solid waste discharged by mine, metallurgy and chemical industries so as to facilitate comprehensive utilization. The treatment method of metal tailings comprises the following steps of ore grinding, alkali preparation, sintering activation, aluminum immersion in aweak base, pelletizing, high-temperature reduction and collection of volatile metals, crushing and magnetic separation, dilute sulfuric acid leaching, oxidation, dilute nitric acid leaching, HF acidtreatment for preparing silicon powder and the like. The method can separate and extract useful components such as aluminum, iron, lead, zinc, silicon, metals with activity less than H, and metals with activity greater than H for recycling so that more than 90% of the components in the metal tailings can be effectively separated, recycled and converted into high-value-added products, resource efficient utilization of the metal tailings is realized, and the reduction processing of harmful tailings is realized.

The invention relates to a constructing method of an artificial parent ecological layer. The method comprises the following steps: anchoring reinforcing steel bars into the surface of a substrate layer which is a rigid protective slope or protective bank formed by concrete and stones; then polishing and washing the surface of the substrate layer; painting a cement paste mixed with acrylate emulsion on the surface of the substrate layer; hanging a forming mold on the surface of the substrate layer; laying a non-sand concrete material on the surface of the substrate layer, which is painted with the cement paste mixed with the acrylate emulsion, in a sectional way; laying the non-sand concrete material in the forming mold; and laying a non-woven fabric and a nutrient substance bag on the laid section. According to the invention, the defects of instability for loosening, large slope, high possibility of falling, incapability of providing and blending nutrient elements required by plants, and the like in the natural parent layer are overcome; a stable artificial parent layer allowing the vegetation to grow can be also formed on a larger-slope and even vertical concrete or stone surface; and the vegetation can grow on the artificial parent layer to reconstruct an ecological system and create a natural, harmonious and beautiful ecological environment.

The invention discloses a method for improvement and protection of a spur dike channel of a mountain river. The method comprises the steps that (1) the channel improvement water level and the channel improvement line width are determined according to the direction of the channel, the planned line form, the hydrological characteristics of the river, the riverbed components and the erosion and deposition evolution characteristic, and (2) the position and the length of a spur dike are determined according to the shipping hindering characteristic of a dangerous shoal and the improvement line width. The method for improvement and protection of the spur dike channel of the mountain river is characterized by further comprising the steps that (3) a dike body structure is laid, wherein a layer of block shaped like the twisted Chinese character 'Wang' is laid on the downstream slope of a dike body; (4) the bottom of the head of the dike is protected; (5) the bottom of the root of the dike is protected; (6) a bank protection structure is arranged. The method is particularly suitable for improvement and protection of the spur dike channel of the mountain river, the strength of the root of the dike and the strength of the head of the dike can be improved, stronger current impact force can be resisted, the overall service life is prolonged, and the method has the advantages of being capable of preventing sediment accumulation, stabilizing a riverbed, protecting the ecological environment and achieving safe flood discharging.

The invention provides a water-permeable structure tunnel structure. The water-permeable structure tunnel structure comprises a sea middle section tunnel main body structure and protective caisson water stopping structures connected to the two sides of the sea middle section tunnel main body structure; the sea middle section tunnel main body structure comprises traffic lane box holes, ballast bin box holes and pipeline bin box holes; a foundation of the sea middle section tunnel main body structure adopts cast-in-situ bored piles; each protective caisson water stopping structure is composed of a temporary protective caisson and a permanent protective caisson; and after the construction period is finished and the temporary protective caissons are dismantled, a blocking box body structure is arranged between each permanent protective caisson and the sea middle section tunnel main body structure. According to the water-permeable structure tunnel structure, by arranging the water-permeable structure and conducting regular dredging, the stability of the ecological environment of a tunnel site area can be reliably ensured, harmonious win-win of environmental protection and municipal infrastructure construction is achieved, the design scheme of the novel water-permeable structure is created, technical innovation with wide prospects is completed, and damage of an existing open cut backfilling construction method to the ocean and land environment is reduced.

The invention discloses a construction method of a butterfly ecological garden. The construction method comprises the following steps: (1) preparing a site, wherein the site is a closed space and is provided with an internal environment regulation and control facility; (2) constructing each functional area, wherein the functional areas comprise a nectariferous plant area and a common plant area ofevading plants and resting plants, the nectariferous plant area accounts for 30-50% of the total area of the butterfly ecological garden, the number of nectariferous plants is not less than 10, the common plant area of evading plants and resting plants accounts for 10-40% of the total area of the butterfly ecological garden, and evergreen plants at least account for 50% of the area of the commonplant area of evading plants and resting plants; and (3) putting butterflies. The method constructs a closed butterfly ecological garden which can be viewed all the year round, can ensure the healthyliving state of butterflies, enables butterflies to keep vigor and have a long life, presents a good viewing effect, and realizes the science popularization education function.

The invention discloses a cultivation method of bighead carp. The method includes: performing cultivation preparation, performing fry daily management, and the like. By the arrangement, the cultivation method has the advantages that silver carp and the bighead carp are used to form a stable ecological environment, a complementary effect is achieved, the cultivation yield and quality of the bighead carp are increased, and the method is green, environmentally friendly, healthy and safe.

The invention relates to the technical field of aquatic organism farming, particularly relates to a grass carp and snail intercropping farming method.Through the intercropping of water spinach, escargot, and grass carp, acyclingplant breeding model of 'grass carp eatswater spinach, snaileats grass carp droppings, and snail droppings promote the growth of water spinach' is formed; in this modelthrough the rational management,the feed materials obtained from independent research and development and aspecial management model are utilized,and theaim ofhigh yieldof grass carp and snailsandincreasedeconomic benefit and reducedcostsis achieved, the grass carp and the snail can form a good symbiosis environment, which has significance for promotions and exemplifications.

The invention provides an efficient artificial breeding method of Lutjanus stellatus in an outdoor ecological pond. The method comprises the following steps: preparation before breeding, water qualitytreatment, fingerling disinfection, fry stocking, and cultivation management, wherein a disinfectant is scientifically prepared, the fingerling disinfectant is used to perform fingerling disinfectionbefore fry stocking, in the three stages of fry growth, rotifer as an initial bait is fed in the larva stage, photosynthetic bacteria and Gram-positive bacteria are sprinkled, the addition of artificial matched feed, and water flow management are combined, a continuous seawater flow is used, an ecosystem of the pond is well maintained, the propagation of other pathogenic bacteria is inhibited, and thereby the purpose of effectively preventing and controlling Lutjanus stellatus diseases is achieved.

The invention discloses a prawn ecological water quality modifier which is characterized in that: prawn ecological water quality modifier is prepared by taking the activated shuck powder as a carrier and the high-activity secondary metabolism product medicine extracted from the fermentation liquid of Chinese herbal medicine as active ingredient. The prawn ecological water quality modifier disclosed by the invention has the advantages of simple preparation method, low cost and strong disease resistance, maintains stability of the ecological environment of prawn pond, and avoids pollution.

The invention relates to the technical field of riverway construction, in particular to a deep pool and shoal for improving the ecological environment of a riverway and a deep pool and shoal construction method thereof.The deep pool and shoal construction method comprises the riverway, a shoal and a deep pool are arranged in the riverway, a shoal generation device and a deep pool generation device are arranged on the two sides of the riverway, and a connecting component is arranged on one side of the shoal generation device; the shoal generating device and the deep pool generating device are arranged on the river channel, so that an accumulation part is arranged on the front side of the shoal generating device, and a guide plate is arranged on the upper side of the shoal generating device, and sediment flowing at the bottom of the river is in contact with the guide plate; the sediment can move downwards to be gathered and can be prevented from being washed away by water flow, the effect that the sediment is accumulated at a fixed position is achieved, then after the shoal generating device is moved away, the accumulated sediment can form a shoal, the water flow speed is increased, paving of the gravels at the river bottom is matched with the water flow, water jump can be generated in the water body, and the oxygen content of the water body is increased.

The invention provides a system and method for efficiently purifying domestic sewage. The system includes a primary sedimentation tank (1), an acidification tank (2), an aeration tank (3) and an anaerobic tank (4) connected in sequence. The pool (1) is used for sedimentation treatment of domestic sewage, and the domestic sewage after sedimentation treatment is transferred to the acidification pool (2); the acidification pool (2) is used for the degradation of organic matter by microorganisms; Oxygen-containing gas and nitrous bacteria are added to convert ammonia nitrogen into nitrite ion form through nitrification, and phosphorus-accumulating bacteria in domestic sewage are used to remove phosphorus; the anaerobic tank (4) is used to receive the aeration tank (3) The treated domestic sewage supernatant is denitrified by denitrification. The present invention mainly uses the combination of chemical precipitation and microbial phosphorus removal to remove phosphorus, and uses NH 4 + —NO 2 ‑ —N 2 For the denitrification route, the effective management of denitrification and phosphorus removal of domestic sewage has been realized to ensure that domestic sewage will not affect human health during human activities.

The invention relates to the field of probiotics and prebiotic preparations, and particularly discloses a preparation method of an enteric probiotic and prebiotic compound preparation. The probiotics are embedded through edible materials, so that a final preparation is resistant to acid and high temperature and convenient to store and use, and people do not need to worry about inactivation of the high-temperature probiotics. The probiotics are subjected to a vacuum freeze-drying process, the moisture content is extremely low, the probiotics are suspended with edible oil, the shelf life of the product is greatly prolonged, a special transportation device is not used in the sales and transportation process of the product, the transportation cost is reduced, the product price is more popular, and the sales space is increased. The preparation process of the enteric probiotics and prebiotics is relatively simple, the embedding rate is high, the processing cost is low, and the preparation method is suitable for industrial production.

The invention discloses an integrated cage-type denitrification reactor. The reactor body is provided with a water inlet zone, a reaction zone and a separation zone from the bottom up. The water inlet zone is provided with a sludge discharge pipe, a water flow steering zone, a water inlet pipe and an air inlet pipe from the bottom up. The upper end of the air inlet pipe is provided with an aeration head. The reaction zone is equipped with a longitudinal partition board to divide the reaction zone into an aerobic zone and an anaerobic zone. The aerobic zone and the anaerobic zone are respectively separated into three cages by four perforated baffles, and 1 / 4-1 / 3 of each cage is filled with a sinking / floating porous filling material. The separation zone is provided with a longitudinal partition board to divide the separation zone into a settling zone and a gas release zone which are communicated through an upper guide plate and a lower guide plate. The top of the settling zone is provided with an overflow weir, and a water outlet pipe is disposed at the bottom of an overflow groove. The invention integrates short-cut nitrification and anaerobic ammonium oxidation, can avoid biotoxicity caused by nitrite accumulation, and also can overcome matrix proportion regulation problem. The spatial distribution of functional bacteria is relatively fixed, thus being in favor of micro-ecological environment optimization. Driven by an ascending air current, the reaction solution undergoes internal circulation, nitrification and denitrification occur alternately, thus contributing to mass transfer and reaction as well as improvement of volume denitrification efficiency.

The invention belongs to the field of plant protection, and discloses a Pantoea ananatis H2 (Pantoea ananatis H2), which is preserved in the China Center for Type Culture Collection (CCTCC) with a preservation number of M2018844. The invention also provides the above-mentioned Pantoea ananatis H2. The application of the bacterium in the preparation of the medicine for preventing or treating the plant disease caused by the colloid anthracnose pathogen and the plant wilt caused by the Fusarium oxysporum. The present invention also provides a microbial agent containing the above-mentioned Pantoea pineapple and a preparation method of the microbial agent, and provides that the above-mentioned microbial agent can be used in the preparation of medicines for preventing or treating plant diseases caused by colloid anthracnose pathogens, Application of Fusarium sporogenes in the medicine of plant wilt. The Pantoea pineapple P. ananatis H2 of the present invention can have strong antibacterial effect on Fusarium wilt and anthracnose at the same time, and the antibacterial rate on Fusarium oxysporum reaches 92.7%, has excellent antibacterial effect, and has good antibacterial effect. development and application prospects.

The invention provides an efficient artificial seedling raising method for white star snapper in an outdoor ecological pond, which comprises the following steps: preparation before breeding, water quality treatment, fingerling disinfection, stocking of fingerlings, and cultivation management, wherein, a disinfectant is scientifically formulated, and before stocking of fingerlings Use fingerling disinfectant for fingerling disinfection. In the three stages of fry growth, the larvae are fed with rotifers, sprinkled with photosynthetic bacteria and gram-positive bacteria, and combined with artificial feed and water flow management, using continuous seawater flow , to maintain the ecosystem of the pond, inhibit the reproduction of other pathogenic bacteria, and achieve the purpose of effectively preventing and controlling the disease of white star snapper.