40 results about "Green algae" patented technology

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 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 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 disclosure related to water-miscible forms of astaxanthin produced by transgenic red algae strains transformed to express β-carotene ketolase and hydroxylase genes from a green algae. These water-miscible forms of astaxanthin are aggregations of astaxanthin secreted by the transformed red algae. The particles accumulate in the extracellular space and are enriched in stationary phase of the algae culture, which enables simple and efficient isolation and purification of astaxanthin from algae. Thus, also disclosed herein are methods of isolating and / or purifying astaxanthin from transgenic algae comprising separating algae cells from its culture solution to collect the supernatant and then centrifuging the supernatant to pellet astaxanthin for collection and optionally further purification.

This invention discloses a method for assessing the toxicity of antibiotics to green algae based on Fourier transform infrared spectroscopy, comprising: constructing a multidimensional experimental dataset containing different antibiotic concentrations and exposure times under controlled conditions, and simultaneously acquiring raw infrared spectra and degradation efficiency data of green algae. The spectral data are preprocessed to extract toxic response features characterizing cell damage and metabolic feedback features reflecting metabolic activity, forming a dual-path spectral feature set. A heterogeneous information network containing toxic effect edges and degradation feedback edges is constructed using antibiotic concentration and green algae state as nodes. A toxicity joint inference model is constructed based on a graph neural network, and the model is trained using the heterogeneous information network to achieve synergistic analysis of toxic effects and degradation potential. The trained model is used to analyze the target water area situation, simulate the purification process, and generate a dynamic river purification planning report including nodes for biomass maintenance and auxiliary intervention measures, providing comprehensive and accurate purification decision support.

The application discloses a kind of multicomponent plankton algae concentration measurement method based on fluorescence spectrum stratification partitioning.The application belongs to the field of marine aquatic ecological environment monitoring technology.The algorithm will unknown to be analyzed mixed three-dimensional fluorescence spectrum according to the following stratification partitioning analysis idea to be analyzed.First layer: full spectrum is involved in analysis, and the purpose is to analyze cyanophyta concentration and cryptophyta concentration, and obtain the difference spectrum in full spectrum region.Second layer: partitioning analysis, take the region containing effective spectral feature to participate in analysis, and the purpose is to analyze chlorophyll a concentration of green algae, diatom, dinoflagellate and yellow algae.The algorithm is significantly superior to common analysis algorithm in reducing misidentification, especially in processing such as diatom, dinoflagellate and yellow algae with high similarity living body fluorescence spectrum.

This invention relates to a floating photocatalytic material, its preparation method, and its application in cyanobacteria control. The method includes the following steps: uniformly mixing a phenolic compound, an aldehyde solution, a solvent, and an alkaline catalyst, followed by a prepolymerization reaction to obtain a prepolymer; adding a foaming agent to the prepolymer and mixing uniformly to obtain an emulsion; adding an acidic catalyst to the emulsion and undergoing a gelation reaction to obtain a wet gel; and curing the wet gel by heating to obtain the floating photocatalytic material. This invention utilizes an integrated foaming process to simultaneously form a porous structure with interconnected internal components during synthesis, giving the material sufficient low density to achieve self-floating. The material itself is the photocatalytically active component, simultaneously possessing structural support and buoyancy functions, achieving integrated construction of material function and structure. This effectively avoids problems such as active component shedding, loss, and secondary pollution, resulting in high catalytic efficiency. This material can be directly used as a floating board for cyanobacteria control, achieving efficient and eco-friendly continuous inhibition of cyanobacteria.

The application discloses a multifunctional anti-corrosion blue-green algae carbon material electrode and a preparation method and application thereof, and belongs to the field of electrode materials. The application takes blue-green algae carbon material as a core. The cell structure of blue-green algae is naturally provided with a multistage pore structure, and can be converted into hierarchical porous carbon after pyrolysis, which is beneficial to in-situ nitrogen doping, has a large specific surface area, high electrochemical activity, and strong conductivity. The wettability of the carbon felt gap is improved by increasing the gap. Meanwhile, through three paths of improving anchoring capacity by KOH surface chemical modification, maintaining organic acid obtained by carbon fixation by compounding Co3O4 slurry and precisely loading active components, and constructing and cross-linking double protective layers, the uniform distribution of functional materials, the dense and firm protective layer, and the reservation of electrode conductivity are unified, and finally, a long-acting composite electrode suitable for the electrolyte environment of a carbon fixation photovoltaic flow battery is prepared.

The present invention relates to the technical field of disinfecting and purifying water reservoirs of blue and green algae. The composition for purifying blue and green algae from water, according to the present invention, comprises copper sulfate powder and a binder, i.e. a hydrophobic agent, including a hydrophobic agent melt as a binder, in the form of a high melting point triglyceride fraction, by adding the hydrophobic agent melt to the copper sulfate powder heated to a temperature of 60-70° to form a superhydrophobic coating with a contact angle of 155-165°, the composition ratio of the components being as follows: copper sulfate: 85-97 wt%, the hydrophobic agent melt in the form of a high melting point triglyceride fraction - the balance, then homogenized, incubated at a temperature of 65°C for no more than 5 minutes, cooled to room temperature, and the resulting mixture is ground to a dispersed state with a particle size of 50-250 microns.

The application discloses a single-cell green alga chlorophyll synthesis-defective mutant strain and application thereof. The mutant strain includes Parachlorella kessleri SCUT-ACB 4 and SCUT-ACB 4-65, and the preservation numbers are CCTCC NO: M 2022518 and CCTCC NO: M 2022519, which are preserved in the China Center for Type Culture Collection of Wuhan University in Wuhan, China on April 28, 2022. Compared with wild-type algae strains, the mutant strain in the application fundamentally cuts off non-light-dependent chlorophyll synthesis, and the content of chlorophyll a is reduced by more than 98%, and the content of chlorophyll b is reduced by 100%, and the algal body is golden yellow, and the mutant strain can be used for producing protein, and provides high-yield and high-quality fermentation algae for replacing protein in precise fermentation production.

The present invention relates to a composite material for preventing algal blooms based on titanium dioxide (TiO2) and titanium suboxide (TinO2n-1, where n is an integer from 1 to 10) photocatalysts, and a method for preventing algal blooms using the same. The titanium dioxide and titanium suboxide composite material according to the present invention can semi-permanently suppress the growth of algal blooms by preventing biofilms or algae from attaching to the water tank using the photocatalytic phenomenon. The components of this composite material have relatively low toxicity and excellent biocompatibility, as well as the advantages of being harmless to the human body and environmentally friendly. Therefore, by attaching or applying a thin film or solution for preventing algal blooms containing the titanium dioxide and titanium suboxide photocatalyst composite material according to the present invention to the surface of a fish tank, the growth of algal blooms can be semi-permanently suppressed, and it is expected that there will be an effect of reducing long-term management costs and effort.

This invention relates to the field of biogas purification technology, specifically to a biological biogas desulfurization and decarbonization method coupled with green algae photosynthetic oxygen production, comprising the following steps: S1: Raw material gas pretreatment: Crude biogas is sequentially subjected to dust removal and pressurization to obtain pretreated gas; S2: Green algae cultivation and bioreaction system construction: The green algae cultivation system is started to prepare green algae culture medium, and green algae produce oxygen through photosynthesis; A composite culture medium is added to the biological desulfurization tank and a mixed bacterial agent is introduced to construct a desulfurization reaction system; S3: Simultaneous desulfurization and decarbonization reaction: The oxygen produced by the green algae cultivation system is transported to the biological desulfurization tank in a closed loop; This invention is the first to construct a four-phase closed-loop circulation system of bacteria-algae-gas-liquid at the engineering level, which dedicates the green algae photosynthetic oxygen production to desulfurization and oxygen supply, fundamentally solving the safety and explosion risks caused by the mixing of oxygen into purified biogas in existing microalgae-based biogas purification technologies.

The application relates to the technical field of marine ecological disaster monitoring, and discloses a green algae area estimation method based on an unmanned aerial vehicle non-orthographic operation mode, which comprises the following steps: firstly, spectrum energy analysis is used to determine a sea state mode and to inversely calculate a basic wave height, a vertical non-uniform atmospheric extinction model is constructed to perform physical defogging; secondly, a fluid-solid coupling damping coefficient is inversely calculated based on texture entropy and glare characteristics, and a green algae microscopic equivalent mean square slope is corrected; finally, pixel-level macroscopic slant range projection, a wave shielding compensation factor and a microscopic surface area correction factor are comprehensively used, and a Sigmoid smoothing truncation weight function is combined to calculate a green algae physical total surface area. The application solves the measurement error caused by the non-uniformity of atmospheric medium, wave shielding and the absence of microscopic geometric characteristics under non-orthographic observation, and significantly improves the monitoring accuracy under complex sea conditions.

The present application relates to the technical field of water treatment, and particularly relates to an intelligent aquatic plant floating ball for emergency disposal of blue-green algae bloom and a treatment method, the aquatic plant floating ball has two structural forms, including floating ball A and floating ball B; the floating ball A adopts a lower hemispherical shell body a1 and an upper hemispherical shell body a2 which are detachably connected, the outer side of the open end of the lower hemispherical shell body a1 and the inner side of the open end of the upper hemispherical shell body a2 are connected through threads, and the two hemispheres are combined; the lower hemispherical shell body a1 adopts white PVC material; the bottom of the first hollow PVC pipe is a plastic water-permeable grid integrated with the lower hemispherical shell body a1, which is used for avoiding that the adsorption material falls into water under the action of gravity, and simultaneously serving as a water body access channel of the adsorption material, and in combination with the enclosure, rapid response, high efficiency and emergency can be realized, and the emergency disposal response time and the emergency disposal cost are greatly reduced.

This invention discloses a comprehensive regulation method and system for water engineering systems to control cyanobacterial blooms in large shallow lakes, belonging to the field of water environment technology evaluation. The method includes: identifying the research object and pre-setting a water diversion scheme; optimizing the inlet combination, inlet flow rate, outlet combination, and outlet flow rate allocation; then, using a three-dimensional mathematical model of wind-driven flow across the entire Taihu Lake area, selecting the optimal hydrodynamic scheme A with the objective of minimizing the spatial distribution of the lake's water exchange cycle, and selecting the optimal water quality scheme B with the objective of maximizing the water quality improvement rate and compliance rate; finally, based on schemes A and B, and combining the overall physical model of wind-driven flow across the entire Taihu Lake area and the three-dimensional mathematical model of Taihu Lake, determining the optimal scheduling scheme for controlling cyanobacterial blooms with the greatest benefit and fastest water exchange, with the objectives of a short average water exchange cycle and low nitrogen and phosphorus load entering the lake. This invention provides key technical support for the precise control of cyanobacterial blooms and the continuous improvement of the water environment in Taihu Lake and similar large shallow lakes.

The application provides a detachable modular photocatalytic blue-green algae removing floating device, which comprises a plurality of blue-green algae removing floating units, the plurality of blue-green algae removing floating units are detachably connected, the blue-green algae removing floating unit comprises an outer frame, a partition plate, a connecting assembly and a floating plate, the outer frame is arranged around the partition plate, the partition plate is concave relative to the two end faces of the outer frame to form a bearing surface and a water contact surface, a plurality of hollow holes are arranged on the partition plate, the hollow holes are connected with the bearing surface and the water contact surface, the floating plate is arranged on the bearing surface, and the floating plate is used for generating active oxidants under light conditions, the application can control the buoyancy, adopts a modular design, realizes long-term stable construction of a gas-liquid-solid three-phase interface, has high integrity, is convenient to centrally place, recycle and maintain, significantly reduces engineering operation cost, effectively improves the water flow resistance and the wind and wave resistance of the device, and is suitable for complex natural water body environments.

The present application relates to blue-green algae treatment technical field, disclose a kind of for urban lake blue-green algae treatment floating filter device, comprising: floating plate, the floating ball is fixedly installed in the bottom of the floating plate, the mounting plate is fixedly installed on the floating plate, the mounting plate is connected with external walking component, the separation tank, temporary storage cylinder, medicine cylinder and water suction pump are fixedly installed in the top of the floating plate, the height difference of temporary storage cylinder and separation tank is formed natural liquid level potential energy by communicating vessel principle, cooperate water suction pump, water inlet pipe complete blue-green algae water suction temporary storage, again by first solenoid valve opening and closing control water body flow, without centrifugal, pressurization and other complex separation means, rely on bottom water inlet thrust to lift liquid level and realize flocculation blue-green algae natural overflow, both reduce separation energy consumption, and can realize blue-green algae flocculation and clear water in situ layering, solve the problem that traditional blue-green algae treatment equipment separation process is complex, energy consumption is high.

This invention relates to a method for calculating the horizontal and vertical movement rates of cyanobacteria in lakes based on geostationary satellite data. The method includes: acquiring geostationary satellite remote sensing reflectance data and calculating algal bloom coverage, i.e., the percentage of algal bloom area in each pixel relative to the total pixel area; extracting a geostationary satellite remote sensing image; extracting algal bloom pixels based on an algal bloom coverage greater than a preset threshold; and defining spatial continuity. N An area with more than one algal bloom pixel is defined as an algal cluster. The horizontal movement rate of the algal cluster is calculated based on its movement distance and time, and this horizontal movement rate characterizes the horizontal movement rate of the cyanobacteria. The algal bloom coverage of a specific pixel is obtained, and the vertical movement rate of the algal particles in that pixel is obtained based on the pixel's water depth and changes in algal bloom coverage at different times, and this vertical movement rate characterizes the vertical movement rate of the cyanobacteria. The speed calculated by the method of this invention can accurately reflect the horizontal and vertical movement of algal blooms in a given area.

The application relates to a hydraulic engineering repairing device for treating sewage, and relates to the technical field of water pollution, and comprises a floating plate, a shell, an aeration device, a conveying pump, a suction pipe, an agitating piece, a cavity reducing device, a liquid storage device and a liquid suction head. The application can solve the problem that the existing technology forcibly pumps bottom sewage to the surface layer, which destroys the original temperature stratification of the water body, easily causes phosphorus in the bottom mud to be transferred to the surface light enrichment area, thereby causing blue-green algae outbreak, and when treating high-concentration pollution in the bottom layer, the device only relies on single physical aeration, lacks the cooperation of chemical agents, and the bottom sludge is difficult to be effectively turned up, so that the purification efficiency of deep-layer hydrogen sulfide and other pollutants is extremely low, and deep-water bottom layer repairing work is difficult to smoothly carry out and the like.

The utility model relates to blue-green algae treatment technical field, concretely relates to a blue-green algae bloom treatment device. The device includes the case, the upper portion of case is fixedly connected with a plurality of floating plates, the lower portion of case rotatably installs the propeller, the top of case rotatably installs the drive ring, the distance from the end of floating plate away from the case to the case is less than the radius of drive ring. The first drive mechanism and second drive mechanism are equipped in the case, and the ultrasonic generator is arranged on the case. When using, the case is moved in the water area through the propeller, and the plane position of ultrasonic generator in the water area is changed. When the rotating drive ring contacts the boundary of water area, the reaction force between drive ring and boundary drives the case to deflect, so that the propelling direction of propeller is changed, and the moving direction of the whole device is changed, so that the ultrasonic generator can move in the larger range of water area, and the range of ultrasonic generator in the water area for treating blue-green algae is improved.

This utility model relates to the field of algae cultivation, and more particularly to a mixed gas supply device for an indoor propagation workshop. The indoor propagation workshop mixed gas supply device includes an air supply unit, a carbon dioxide supply unit, a gas mixing unit, a gas filtration unit, and a gas distribution unit, all connected by pipelines. The air supply unit includes an air compressor, a first self-regulating pressure constant valve, and an air buffer storage tank. The indoor propagation workshop mixed gas supply device provided by this utility model, by installing a flow meter on the inlet pipe of the mixing device in the gas mixing unit, can precisely control the flow ratio of air to carbon dioxide to 1%-4%, ensuring stable mixed gas composition, meeting the stringent gas composition requirements of Haematococcus pluvialis and green algae during the propagation stage, improving photosynthetic efficiency, and promoting rapid cell division and expansion of Haematococcus pluvialis during the reproductive growth stage.

The application provides a method for improving fish habitat environment by increasing diatom attachment growth, comprising the following processing steps: S1, placing a carrier as an attachment medium in water; S2, adding a heteropolysaccharide substance on the carrier; S3, after adding the heteropolysaccharide substance for 10-50 days, a biofilm appears on the carrier, and the biofilm contains abundant algal attachment. The application promotes the attachment growth of diatoms, green algae and other sinking algae on the surface of the carrier by placing the carrier with a bearing surface in water and adding a heteropolysaccharide substance, and by controlling the light receiving depth, attachment area and heteropolysaccharide concentration of the carrier in water. The method promotes the attachment growth of diatoms and other algae by using the heteropolysaccharide and nutrient salts in water, realizes the absorption and utilization of nutrient salts such as nitrogen and phosphorus in water, obtains attached algae such as diatoms, and achieves the purpose of improving the fish habitat environment. The application is suitable for different water environments such as seawater, freshwater and brackish water.

The present application relates to the technical field of water environment treatment equipment, in particular to a floating type artificial wetland repair system with fish regulation function and application. The system comprises a floating body mechanism floating on the water surface, a guide positioning frame and a suspended bionic structure. The suspended bionic structure is sequentially connected in the vertical direction by an upper weight connecting section, a middle rigid sound emitting section and a lower flexible trapping section. The pipe wall of the middle rigid sound emitting section is provided with a narrow slit-shaped opening, which can generate fish driving sound waves when the water flow passes laterally. The lower flexible trapping section is composed of multiple flexible fibers, which provide fish with attachment and shelter space. The system utilizes the natural change of water flow velocity to achieve "slow flow fish luring and algae control, rapid flow fish driving and protection", which is automatically switched passively without external energy input. It can efficiently cooperate with plants, microorganisms and fish to purify water quality, and significantly improve the regulation capacity of blue-green algae.

The application discloses a harmful algae treatment technology based on in-situ electrochemistry, which comprises the following steps: S1, releasing a reactive treatment agent in-situ: setting a reactive treatment agent releasing device in-situ in the water body of a lake area to be treated, so that the treatment agent reacts with impurities and microorganisms in the water to form flocculation; S2, treating the sediment: using a suction device to suck part of the sediment and the bottom water of the lake to form a sediment slurry, and introducing the slurry into a high-level oxidation device for oxidation treatment; S3, mixing the slurry: mixing the sediment slurry after the oxidation treatment and the flocculation water flow rich in ions generated by the in-situ release of the reactive treatment agent to form a mud-water mixture, and fully contacting the sediment particles and the flocculant through stirring, and the application relates to the technical field of water environment treatment, and realizes efficient elimination of blue-green algae blooms in the lake and water quality purification through the organic combination of in-situ release of a reactive treatment agent, sediment reuse and high-level oxidation and other means.

The application discloses a method for preventing blue-green algae outbreak by setting algal bloom control curve, comprising the following steps: determining the chlorophyll a concentration threshold K of blue-green algae outbreak of a target lake; calculating the turning point time T of blue-green algae growth of the target lake z ; calculating the turning point time T s of blue-green algae growth and the chlorophyll a concentration of the target lake; calculating the algal bloom control curve one based on the turning point time T z and the chlorophyll a concentration; calculating the algal bloom control curve two based on the turning point time T z and the turning point time T s ; and setting the area below the lower curve of the two curves as the chlorophyll a concentration control range of the target lake at the corresponding time according to the algal bloom control curve one and the algal bloom control curve two. The application can prevent large-area high-concentration outbreak of blue-green algae in the lake, long-term effectively guarantee the water ecological environment quality of the lake, and reduce the cost of algal bloom control measures and fully exert the engineering benefits.

This invention relates to the field of bioengineering technology, specifically to a method for promoting the growth of Haematococcus pluvialis in its green algal stage using L-Abrine. The method significantly promotes cell proliferation and biomass accumulation in the green algal stage of Haematococcus pluvialis by adding an appropriate concentration of L-Abrine to the culture medium. Experimental results show that L-Abrine significantly promotes biomass accumulation in Haematococcus pluvialis, increasing biomass by 36.36%–54.54% compared to the control group. This method is simple to operate, cost-effective, and has stable results. It requires no changes to existing culture equipment and conditions; efficient growth promotion can be achieved simply by adding L-Abrine. This invention provides a new technical approach for the large-scale cultivation of Haematococcus pluvialis and the efficient production of astaxanthin, with promising industrial application prospects, and provides sufficient material conditions for the subsequent synthesis of astaxanthin from Haematococcus pluvialis.

The invention relates to the use of kahalalide-type depsipeptide compounds of formulae I and / or II, obtained from the green alga Pedobesia sp., for controlling a broad spectrum of fungal plant pathogens. The invention also encompasses fungicidal compositions comprising said compounds with a phytologically acceptable carrier, a process for their preparation from Pedobesia biomass, and their use for the preparation of a medicament for treating mycosis such as that caused by Candida albicans or Trichophyton rubrum.

This invention discloses a method for anaerobic co-fermentation of cyanobacterial sludge to produce acid through pretreatment with bovine rumen fluid. 6–12 g of bovine rumen fluid is added to every 100 mL of the cyanobacterial sludge-water mixture, and the mixture is pretreated at 35–39°C for 12–24 h. Without removing or deactivating the bovine rumen fluid, it is mixed with inoculum sludge, and the pH of the system is adjusted to 9.5–10.5. After replacing oxygen with an inert gas, anaerobic fermentation is carried out at 35–37°C, maintaining a stirring speed of 120–150 rpm. This method can promote the dissolution of proteins and carbohydrates in cyanobacterial sludge and increase the yield of acetic acid and volatile fatty acids, making it suitable for the resource utilization of cyanobacterial sludge and the preparation of alternative carbon sources.