291 results about "Green algae" patented technology

A lake cyanobacterial bloom pixel level prediction method based on multi-source data fusion belongs to the technical field of algae prediction, and comprises the following steps: collecting lake pixel level multi-source basic data in a satellite image and carrying out preprocessing, calculating an algae index to generate a binary distribution product, carrying out space-time matching according to a zoning factor suitability parameter table, and carrying out prediction according to the zoning factor suitability parameter table. Inverting a blue-green algae proliferation rate and adjusting a factor weight; calculating a pixel comprehensive suitability degree; identifying a hysteresis effect factor through correlation analysis and causal test; screening a high impact factor through feature sorting, constructing a diffusion rule, extracting an initial water bloom pixel and determining a diffusion starting point; and constructing a neighborhood iterative diffusion model by using the space-time dynamic pixel-level suitability matrix, and iteratively simulating and outputting a pixel-level water bloom prediction map. According to the method, through multi-source pixel-level data standardization processing and partition threshold modeling, the coupling diffusion model is optimized in combination with the multi-source data, accurate water bloom prediction is achieved, and the space-time precision and practicability of pixel-level prediction are improved.

The invention discloses an integrated device for spraying and recycling foliar fertilizer and disease algae-removing medicine in an ebb-tide interval period for cultivating laver on a beach. The integrated device is designed for solving the problems of poor algae growth, rot and green algae invasion caused by uneven nutrition in a sea area. Universal wheels are arranged at the bottom of a tray, the height of the universal wheels is 30 cm, and the universal wheels adapt to hard mud of the mud flat; mechanical traction and traction round holes in the two sides are matched with a hand pull rod with a hook to achieve manual steering and power-assisted traction. According to the pesticide-fertilizer liquid spraying system, a liquid storage tank is connected with a front-end double-row atomization spray head set through a water pump, spraying is conducted from bottom to top, a raft frame rope net is covered, and the double-face pesticide receiving rate of the algae is increased. And the residual liquid recovery system comprises a flocculent filter pad for primary filtration, a conical bottom precipitation tank for standing and sand removal, a floating filter for three-stage filtration and residual liquid recovery to a liquid storage tank. By means of the device, leaf fertilizer and disease algae removal pesticide spraying and recycling are effectively implemented, the prevention and control efficiency is improved, the environmental risk is reduced, and green algae prevention and control and laver yield and income increase are achieved.

The invention relates to the technical field of blue-green algae cleaning, and discloses a blue-green algae cleaning boat and a cleaning method.The blue-green algae cleaning boat comprises a boat body, a bearing frame, a cleaning assembly, a dumping and collecting box and a power supply driving assembly, and the boat is composed of two suspension bodies to improve buoyancy and stability. The bearing frame is located on the inner side of the ship body and provides a bearing area for installing the cleaning assembly and other related components. The cleaning assembly is located above the bearing frame and used for cleaning and conveying algae pollutants. And the dumping and collecting box is arranged at the tail end of the cleaning assembly and is used for receiving and storing the cleaned and conveyed algae pollutants. The power supply driving assembly provides assembly working power and supports work of the cleaning assembly. The small boat firstly runs to a preset position and is accurately positioned by additionally arranging a built-in navigation system. And after the blue-green algae arrives at the target area, the cleaning assembly starts to work, and the blue-green algae is removed from the water surface through a cutting and conveying mechanism and conveyed into a dumping and collecting box. The cleaned algae are directly conveyed into the collecting box through the conveying device, and the pollutant collecting process is completed.

The invention relates to a cyanobacterial bloom remote sensing recognition system based on a multi-source satellite and intelligent threshold correction, and the system comprises an intelligent image retrieval and screening module which is used for calling a multi-source image according to a daily frequency / weekly frequency period and generating a candidate set; the water body mask and preprocessing module is used for cloud removal, cutting, water body extraction and non-target plaque removal; the water bloom index and threshold value module is used for automatically calculating an ABDI or FAI index according to an image source and carrying out peak height proportion threshold value segmentation; the pattern spot extraction and clustering module is used for extracting algal bloom patches, merging pattern spots and removing small patches; and the standardized product generating and pushing module is used for generating and pushing grids, vectors, daily frequency brief reports and weekly frequency thematic reports. According to the invention, daily frequency / weekly frequency automatic and intelligent identification and achievement business output of cyanobacterial blooms can be realized, and the precision and continuity of remote sensing monitoring are significantly improved.

The invention provides a blue-green algae image recognition method and system based on hierarchical self-adaption and domain driving, and the method comprises the steps: enhancing an image through employing an improved dark channel algorithm; constructing a blue-green algae biological attribute text database, and performing synonym replacement and sentence pattern recombination; multi-scale visual features are extracted through a hierarchical adaptive Swin Transform model, and key region characterization is enhanced in combination with dynamic spectrum attention; the text is input into a Bio-ALBERT model, and semantic embedding of field optimization is generated through term mask prediction and attribute relation pre-training; constructing a two-layer heterogeneous graph by using a graph attention interaction network GAIN, calculating a cross-modal association weight through a bidirectional graph attention mechanism, and outputting a cross-modal graph feature; multi-scale cross-modal association is modeled through a hierarchical graph attention fusion mechanism, and a comparison alignment loss optimization model is combined; and high-precision blue-green algae identification is realized. According to the method, through multi-scale perception, domain semantic adaptation and graph structure fusion, the accuracy of blue-green algae detection in a complex environment is improved.

The utility model discloses a blue-green algae mud dehydration treatment device based on a solar photothermal conversion technology, which belongs to the technical field of blue-green algae dehydration and comprises a dehydration chamber, an evaporation chamber, a collection chamber, a water storage chamber and a photovoltaic power supply system which are communicated in sequence, the dehydration chamber is located below the treatment device, the outer side of the dehydration chamber is connected with an algae mud branch pipe, and an evaporation system is arranged in the dehydration chamber and comprises an underwater heat conduction shell and a floating type composite fabric material; the evaporation chamber is positioned above the whole device; a water collecting top plate is arranged in the evaporation chamber; the floating type composite fabric material is a carbon fiber fabric modified by a nitrogen-doped carbon nano tube; the collecting chamber is positioned on one side of the evaporation chamber; and the water storage chamber is positioned below the collecting chamber. Solar energy is used as clean energy, moisture in blue-green algae is evaporated through the photothermal effect, and therefore efficient treatment of the blue-green algae is achieved, environmental pollution caused by chemical treatment can be reduced, and economic cost of blue-green algae treatment can be effectively reduced.

The invention discloses a single-cell green alga and application thereof. The name of the single-cell green alga is Coelastrus sp. BS01, the preservation number is CCTCC NO: M 20251671, the preservation date is July 22, 2025, and the preservation unit is China Center for Type Culture Collection in Wuhan University, Wuhan, China. The single-cell green alga can grow in a selenium-polluted water body with relatively high concentration, can efficiently remove selenium in the water body and is enriched in alga cells, so that the single-cell green alga has the application potential of enriching and converting selenium.

The invention is applicable to the technical field of industrial wastewater treatment, and provides a construction method of a microalgae-in-situ bacteria strengthening system for degrading naphthenic acid, which comprises the following steps: separating and identifying two strains of in-situ bacteria from a discharge port of an oil-producing wastewater treatment plant, and constructing a three-strain typical stain-resistant green alga-in-situ bacteria co-culture system. The strengthening system can highly tolerate and efficiently degrade naphthenic acid, can effectively remove nitrogen and phosphorus, and has higher biomass and high-value compound yield. The microalgae-in-situ bacterium strengthening system can reduce pollutant discharge and improve the microalgae resource utilization rate, and the microalgae-in-situ bacterium strengthening system can be used as a biological strengthening degradation technology of naphthenic acid and can be suitable for purification treatment of oil production wastewater and petroleum polluted water areas.

The invention provides an oral thylakoid product for resisting organ failure and aging, which is prepared by the following steps: extracting thylakoid from plants including spinach, arabidopsis thaliana, lettuce, cabbage, green algae or wheat seedlings, redissolving the thylakoid into a buffer salt solution A, and carrying out ultrasonic treatment for 10-20 minutes under the ultrasonic power of 200-500W to prepare a suspension; adjusting the concentration of the suspension to 0.5-2 mg / ml, and obtaining a nano capsule-like body with the particle size of 200-500 nm by using a microfluidic technology; the buffer salt solution A is prepared from 10 to 100 mmol / L of 4-hydroxyethyl piperazine ethanesulfonic acid (HEPES), 1 to 2 mmol / L of ethylenediamine tetraacetic acid (EDTA) disodium, 0.5 to 4 mmol / L of magnesium chloride (MgCl2), 1 to 10 mmol / L of ascorbic acid and 100 to 500 mmol / L of sapoeda sodium (SNAC), and the pH value of the buffer salt solution A is adjusted to 7.5 to 8.0; and the concentration of the capsule in the buffer salt solution A is 100-400 mg / mL. According to the product, self QPRT enzyme of the thylakoid is used for efficiently catalyzing de novo synthesis of NAD + of whole body tissues and organs, so that multiple physiological processes such as energy synthesis enhancement, oxidative stress reduction and inflammatory reaction relief are finally realized, organ failure is efficiently reversed, and organ aging is relieved.

The invention proposes a lake comprehensive ecological risk assessment method and system based on multi-source data fusion, and relates to the technical field of ecological risk assessment, and the method comprises the steps: carrying out the sampling of a preset assessment space range of a target lake, and obtaining the multi-source ecological data of the target lake; obtaining a water environment risk value according to historical water quality monitoring data in the multi-source information database; acquiring ecological water level demand data of the target lake according to the historical water level monitoring data, and acquiring a hydrological situation risk value of the target lake; based on remote sensing image data and historical survey monitoring data of the target lake in the multi-source information database, evaluating lakeside vegetation condition, wetland area, blue-green algae coverage area and benthonic animal monitoring data respectively to obtain a water ecology risk value; and performing weight distribution operation on the water environment risk value, the hydrological situation risk value and the water ecology risk value to obtain a comprehensive ecology risk assessment index corresponding to the target lake. The method is beneficial to the accuracy and systematicness of ecological risk assessment.

The application discloses a preparation method and application of blue-green algae-based biochar with Fenton-like oxidation function. The preparation method comprises the following steps: (1) selecting an iron-containing flocculant, adding the iron-containing flocculant into natural lake water containing blue-green algae, and then performing sufficient stirring, standing, filtration, drying, crushing and sieving to obtain blue-green algae powder; (2) placing the blue-green algae powder in a tubular furnace for pyrolysis treatment to obtain preformed carbon; then, immersing the preformed carbon in an activating agent solution, performing sufficient immersion, drying, placing the preformed carbon in the tubular furnace for activation treatment, and finally performing heat treatment under air atmosphere to obtain blue-green algae-based biochar material with Fenton-like oxidation function. The application provides application of the prepared blue-green algae-based biochar in dye wastewater treatment, and the dye wastewater treatment is performed in the presence of hydrogen peroxide, and the blue-green algae-based biochar has high degradation removal rate and high stability.

The invention relates to the technical field of medicines, in particular to application of green alga-based carbon quantum dots in preparation of chikungunya virus infection resisting drugs or decontamination agents. The green algae-based carbon quantum dots belong to nano materials, and the green algae-based carbon quantum dots prepared by a hydrothermal method are good in water solubility, high in stability and high in biocompatibility. The application of the green alga-based carbon quantum dots in the chikungunya virus infection resisting medicine or decontamination agent is reported, the in-vivo and in-vitro antiviral effect is good, the application is reported for the first time internationally, and a new scheme is provided for prevention and treatment of chikungunya heat.

The invention discloses a green algae protein and a preparation method and application thereof, and the preparation method comprises the following steps: (1) crushing dried green algae in a crusher to prepare green algae powder; (2) dissolving the green algae powder prepared in the step (1) in a phosphate buffer solution containing NaCl, and performing ultrasonic treatment; (3) placing the product treated in the step (2) in a chromatography cabinet, stirring and centrifuging to obtain a green algae protein crude extract; (4) adding solid (NH4) 2SO4 into the green algae protein crude extract at 4 DEG C until the saturation reaches 10-30%, stirring, centrifuging, and taking supernate; and adding solid (NH4) 2SO4 to reach the saturation degree of 60-80%, stirring, centrifuging, taking the precipitate, re-dissolving in distilled water, dialyzing, and freeze-drying to obtain the green algae protein. According to the method, the sensitization protein in the green algae can be more effectively extracted, and a new internal standard protein is provided for detection of allergens.

The invention discloses a desert steppe grass interspecific synergistic agent and a preparation method and application thereof, and relates to the technical field of synergistic agents, the synergistic agent comprises the following raw materials by weight: 30-40 parts of modified cyanobacteria charcoal, 10-15 parts of a microbial fertilizer, 20-30 parts of an organic fertilizer, 10-20 parts of an inorganic fertilizer, 1-2 parts of a plant growth regulator, and 2-5 parts of a water-retaining agent; the modified blue-green algae charcoal is prepared from the following raw materials in parts by weight: 15-30 parts of ferrous sulfate heptahydrate, 15-30 parts of ferric sulfate hydrate, 200-400 parts of water and 10-20 parts of blue-green algae powder. The synergist provided by the invention can effectively improve the growth efficiency of desert grassland grass planting and effectively improve the treatment effect of degraded grassland.

The invention discloses a green algae expression method and application of recombinant human serum albumin, and belongs to the technical field of biology. Aiming at the problems of high cost and incomplete post-translational modification of the existing recombinant protein expression system, the invention provides a technical scheme for efficiently expressing human serum albumin by using green algae. The method comprises the following steps: carrying out codon optimization on a human serum albumin gene sequence, introducing a recombinant vector into green algae cells, and screening transgenic algae strains through a culture medium containing a resistance agent, culturing the transgenic algal strain, splitting the algal cells and separating the recombinant albumin. According to the method, efficient production of the human serum albumin is achieved through a green alga expression system, and the product has a correct folding structure and biological activity and is mainly used for preparing medical plasma substitutes, drug carriers and biological agents.

The invention belongs to the technical field of biology, and particularly relates to a method for increasing the fucoxanthine accumulation amount by using microcystis subjected to depolymerization treatment to feed palmarthria formosana. According to the method, microcystis subjected to depolymerization treatment are added in the culture process of the palmitothecium for heterotrophic culture, meanwhile, continuous inflation is conducted, the microcystis subjected to depolymerization treatment are swallowed by the palmitothecium, and the higher fucoxanthine accumulation amount in the palmitothecium is obtained by means of the culture mode. The experiment proves that after the microcystis is subjected to pretreatment and depolymerization, the removal efficiency of the microcystis is higher by the brown algae, the limitation of treatment of harmful cyanobacteria and ingestion of protozoa is made up, and meanwhile, an integrated solution is provided for biological treatment of cyanobacterial bloom and resource utilization of the microalgae; meanwhile, a new way is provided for obtaining fucoxanthine with higher accumulation amount.

The invention discloses a rapid fattening bait for sea urchins and a preparation method thereof, and belongs to the technical field of aquaculture feeds. The bait is prepared from the following raw materials in parts by weight: 10-25 parts of kelp powder, 10-25 parts of undaria pinnatifida powder, 5-15 parts of ulva pertusa powder, 5-15 parts of mussel powder, 8-20 parts of corn flour, 1.5-4.5 parts of gelatin powder and 30-50 parts of purified water. The sea urchin fattening feed has the beneficial effects that the formula is scientific, the nutrition is comprehensive and balanced, and the sea urchin fattening feed specially aims at the sea urchin fattening nutritional requirements and can remarkably promote rapid development of sea urchin gonads; after the bait enters water, the structure can be kept complete for a long time, the bait is almost free of dissolution loss, the utilization rate of the bait is greatly improved, and water pollution is fundamentally avoided; the bait is soft in texture and easy to gnaw by sea urchins, and the surface of the bait can slowly release food calling substances to attract the sea urchins to gather and eat; in the preparation process, low-temperature mixing and gel shaping are adopted, so that nutrient substances such as heat-sensitive vitamins and unsaturated fatty acids are effectively protected.

The utility model relates to the field of blue-green algae treatment equipment, in particular to a blue-green algae collecting and flocculating device which comprises a barrel body, a flocculating agent leading-in assembly, a water pump assembly, an electric box, a first guide pipe, a second guide pipe, a blue-green algae collector, an insertion column, a ladder, a waste algae discharge pipe and a purified water discharge pipe, the flocculating agent collecting assembly with the flowmeter and the pressure controller is arranged, the dosage of a flocculating agent can be accurately controlled according to different flocculation requirements, and the flocculating agent can be uniformly guided into the barrel, so that the flocculation effect is better, and the flocculating agent is not easily wasted; according to the blue-green algae absorption device, blue-green algae can be intensively collected together through pressure in the blue-green algae absorption process and then guided into the flocculation device, absorption can be more thorough, part of blue-green algae is prevented from being precipitated or dispersed in the absorption process, and the treatment effect is better.

The application discloses application of pyrroloquinoline quinone (PQQ) or a derivative thereof in preparation of a product for relieving or preventing blue-green algae toxin poisoning of yellow catfish, and belongs to the technical field of aquatic animal feed. The PQQ or the derivative thereof can be used as an aquatic feed additive or a medicine, and is added in an amount of 3-6 mg / kg of feed to feed yellow catfish, so as to effectively relieve pathological damage of the liver of the yellow catfish caused by blue-green algae toxin through various ways such as improving key enzyme activity of liver function, inhibiting liver oxidative stress, relieving inflammatory reaction and reducing structural damage of tissues. The PQQ is a new food raw material approved in China in 2022, has advantages of high safety, good water solubility, moderate cost, similar dosage to that of feed vitamins and the like, and provides a safe, economical and convenient new nutritional intervention strategy for blue-green algae toxin poisoning of the yellow catfish, and has a wide industrial application prospect.

The invention discloses a desertified soil restoration method based on microorganism mineralization induction and moss-algae crust, which comprises the following steps: crushing soybeans, and dissolving the crushed soybeans in water to obtain a soybean urease crude extract; adding desert green algae and drought-enduring moss into the cementing liquid prepared from the travertine for later use; the algae crust cementing liquid is obtained; the method comprises the following steps: preparing a soybean urease crude extracting solution, uniformly mixing the soybean urease crude extracting solution with desertification soil needing to be recovered, adding a moss-algae crust cementing solution into the surface layer of the mixed desertification soil, and curing for a period of time to realize the solidification of the desertification soil and the moss-algae crust on the surface layer. On the basis of microorganism mineralization induced sand stabilization, the bryophyllum crust is further applied to the soil surface to enhance the compressive strength of the soil surface, so that the strength of the desertification soil can be effectively recovered, and meanwhile, the bryophyllum crust also enables the desertification soil to be covered by moss and algae again, and the nutrients and environment of the soil are recovered.

The invention provides a nutrition regulator based on bioactive substances and a preparation method of the nutrition regulator based on the bioactive substances. Comprising the following raw materials in parts by weight: 10-20 parts of zymosan, 15-25 parts of fulvic acid, 20-30 parts of a high-activity carbon source, 5-10 parts of compound biological enzyme, 8-15 parts of algae auxin, 8-12 parts of compound probiotics, 3-8 parts of betaine, 15-25 parts of compound mineral elements and 5-10 parts of compound trace elements. According to the nutrient regulator, the algae auxin is formed by compounding the undaria pinnatifida fermentation product, the pomegranate peel fermentation product and the enteromorpha fermentation product, the undaria pinnatifida fermentation product promotes diatom growth, the enteromorpha fermentation product promotes green algae growth, the pomegranate peel fermentation product can inhibit growth of harmful algae such as blue-green algae, and the nutrient regulator has a synergistic effect on the algae auxin. Therefore, the proportion of beneficial algae such as diatom is increased and maintained for a long time, stable, efficient and high-quality water color beneficial to culture is formed, and the productivity structure of the pond is fundamentally optimized.

The invention provides a multi-modal data fusion unmanned aerial vehicle marine enteromorpha efficient monitoring method and system, and relates to the technical field of image processing, and the method comprises the steps: obtaining a natural optical image and an infrared image of marine enteromorpha collected by an unmanned aerial vehicle; inputting the natural optical image into a first backbone network for feature coding to obtain an optical modal initial feature map; inputting the infrared image into a second backbone network for feature coding to obtain an infrared modal initial feature map; performing cross-modal fusion and enhancement processing on the optical modal initial feature map and the infrared modal initial feature map to obtain an enhanced fusion feature map; and inputting the enhanced fusion feature map into a target detection network, and outputting position information, confidence and category information of the enteromorpha plaque. According to the method, the problems of poor adaptability and small target missing detection of single-mode monitoring in a complex environment are effectively solved, and the accuracy, the robustness and the early warning capability of enteromorpha monitoring are remarkably improved.

The application discloses a method for treating cassava starch wastewater by using a microalgae-fungus symbiotic system, and belongs to the technical field of wastewater biological treatment. The method for treating cassava starch wastewater comprises the following steps: pre-culturing oil-rich neochloris oleoabundans to obtain oil-rich neochloris oleoabundans liquid; pre-culturing aspergillus fumigatus to obtain aspergillus fumigatus spores; mixing the oil-rich neochloris oleoabundans liquid, the aspergillus fumigatus spores and filtered and sterilized cassava starch wastewater, and carrying out shaking bed culture to obtain microalgae-fungus biological balls; carrying out sedimentation and sand filtration treatment on the cassava starch wastewater to obtain pretreated cassava starch wastewater; and adding the microalgae-fungus biological balls into the pretreated cassava starch wastewater, carrying out biological treatment in a photobioreactor, and killing algae bacteria to obtain treated cassava starch wastewater. The method has the advantages of good treatment effect, high economic benefit, low cost and low carbon emission, and aims to solve the problems and defects in the prior art.

The invention relates to the technical field of lake eutrophication detection, and discloses a water eutrophication monitoring and pollution early warning system, which comprises a data acquisition module, a data processing module, a model training module and a monitoring early warning module, wherein the data acquisition module is used for acquiring eutrophication factors of a water body of each monitoring station, and the eutrophication factors comprise nutrient salt concentration and blue-green algae sensitive factors of the water body; the data processing module is used for arranging eutrophication factors of each monitoring station and extracting associated features of the eutrophication factors; the model training module trains a pollution prediction model; and the monitoring and early warning module predicts the blue-green algae sensitive factor of each monitoring station based on the correlation characteristics of the pollution prediction model and the eutrophication factor, and performs pollution early warning based on the predicted value of the blue-green algae sensitive factor. According to the method, high-precision prediction of the eutrophication of the water body is realized through space-time correlation modeling of the concentration of the nutritive salt in the water body and the response factors of the blue-green algae.

The application discloses a denitrification and dephosphorization method based on sand filtration in-situ optimization, which comprises the following steps: (1) mixing green algae obtained by centrifugal treatment of green algae bacteria liquid with sodium alginate solution to obtain a sodium alginate green algae mixed solution; and preparing a metal cation solution; (2) pouring the sodium alginate green algae mixed solution into a sand filter tank filled with sand filter fillers in 1-2 times; then pouring the metal cation solution into the sand filter tank in 1-2 times, and solidifying to obtain modified sand filter fillers wrapped with microbial hydrogel; (3) feeding sewage to be treated into the sand filter tank for denitrification and dephosphorization purification; and (4) after the sand filter tank is operated for 15-30 days, discharging sewage in the sand filter tank, and repeating steps (1)-(3). The cross-linking reaction of sodium alginate and metal cations forms hydrogel, the green algae is fixed on the outer layer of quartz sand, and microbial hydrogel is formed, so that the erosion and wear of quartz sand in the filtration process can be protected, and the denitrification and dephosphorization effect is improved.

The invention relates to the technical field of straw degrading microbial inoculants, in particular to a bacterium-algae composite microbial inoculant capable of efficiently degrading straw and reducing emission and sequestering carbon as well as a preparation method and application of the bacterium-algae composite microbial inoculant, and the bacterium-algae composite microbial inoculant is prepared by mixing blue-green algae and Cellulomonas illani according to a mass ratio of 1: (3-9), preferably 1: 7. The preparation method comprises the following steps: respectively culturing blue-green algae and strains to specific optical densities, centrifugally collecting algae and thalli, mixing according to a ratio, complementing the mass with humic acid, and drying and powdering to obtain the microbial inoculum. When the complex microbial inoculant is applied according to 10 g / m < 2 > after straw returning to the field, the straw degradation efficiency can be remarkably improved, meanwhile, through the carbon sequestration effect of blue-green algae, emission of CO2 and CH4 is reduced, straw carbon is promoted to be converted into soil organic carbon, the soil carbon sequestration function is enhanced, the crop growth performance is improved, the synergistic interaction of straw degradation, carbon emission reduction and soil recarburization is achieved, and the crop yield is improved. The method is suitable for agricultural waste recycling and green low-carbon agricultural development.

The invention discloses a method and device for improving acidified soil by using nitrogen-fixing cyanobacteria, the device comprises a culture tank, the outer wall of the culture tank is provided with an extension part, the top of the extension part is fixedly provided with a fixed cover, the inner bottom of the culture tank is fixedly provided with a waterproof motor, and the output end of the waterproof motor is fixedly provided with a stirring rod; a flexible silica gel paddle is arranged on the outer wall of the end part of the stirring rod, an aeration assembly is arranged on the culture tank, and the aeration assembly comprises an annular microbubble aeration pipe fixedly mounted on the inner wall of the culture tank; the device has the beneficial effects that the flexible silica gel paddle is matched with the low-speed waterproof motor and the annular micro-bubble aeration assembly, so that the dual effects of mechanical stirring and air-lift uniform mixing are realized, algae clusters can be thoroughly scattered, the algae liquid is uniform, the damage of high-speed hard stirring to algae cells is completely avoided, the activity of nitrogen-fixing blue-green algae is retained to the maximum extent, and the nitrogen-fixing effect of the nitrogen-fixing blue-green algae is improved. The survival rate of the algae is greatly improved.

The present application belongs to the technical field of straw decomposition and soil improvement, and particularly relates to a method for promoting decomposition of straw returned to field. The present application forms a biological community of diazotrophs by applying artificial cultivation of nitrogen-fixing blue-green algae to a rice field, uses the diazotrophs to increase soil nitrogen by biological nitrogen fixation, and reduces the amount of nitrogen fertilizer applied. Meanwhile, the diazotrophs can also improve the activity of soil decomposing bacteria by secreting active substances such as extracellular enzymes, accelerate the conversion of straw source carbon to soil microbial source carbon, regulate the carbon-nitrogen balance of soil, and reduce the adverse effects on crops. On the other hand, the present application can reduce greenhouse gas emissions, and achieve rapid accumulation of soil organic matter and improvement of soil fertility.

The application provides a kind of biological fertilizer prepared based on blue-green algae mud, and belongs to the technical field of biological fertilizer preparation.The biological fertilizer according to the application comprises, by weight fraction, 20-40 parts of blue-green algae mud fermentation liquor, 30-40 parts of straw, 18-36 parts of animal manure, 5-8 parts of urea, 6-12 parts of ammonium chloride and 0.2-1 part of yeast, wherein the blue-green algae mud fermentation liquor is prepared by mixing blue-green algae mud and heat condensate, then adding enzyme preparation, mixed Bacillus and inorganic salt mixture, and anaerobic fermentation culture.The application not only realizes the resource treatment of blue-green algae mud and reduces environmental pollution, but also the prepared biological fertilizer contains nutrients such as nitrogen, phosphorus and potassium required for plant growth, and the crops applying the biological fertilizer prepared by the application can not only improve the survival rate, but also further improve the yield per mu, improve the soil quality, and the soil porosity reaches 60-65%, without caking and residue.

The invention discloses a blue-green algae collecting device based on a magnetic carrier and a collecting method of the blue-green algae collecting device, and belongs to the technical field of blue-green algae treatment. The device comprises a liquid storage unit, a magnetic separation unit and a collection unit, the magnetic separation unit is matched with the liquid storage unit, the magnetic separation unit generates a directional magnetic field and acts on mixed liquid in the liquid storage unit, so that magnetic carriers combined with blue-green algae in the mixed liquid are gathered in the acting direction of magnetic field force, and the blue-green algae-magnetic carrier compound is formed. The magnetic carrier is prepared, and polydopamine (PDA) is rich in active groups, so that the affinity and binding force to cyanobacteria cells are enhanced; meanwhile, a buffer solution is used for accurately regulating and controlling pH, the optimal environment for carrier synthesis and blue-green algae combination is guaranteed, and compared with an unmodified carrier, the blue-green algae capture rate is remarkably increased.