96 results about "Bacillariophytes" patented technology

The invention belongs to the technical field of lake and reservoir water source risk prediction, and provides a lake and reservoir water source algae bloom risk early warning system based on a 16S / 18SrRNA gene expression quantity threshold, and the method comprises the following steps: S1, collecting a sample from a lake and reservoir water source surface layer water body; s2, using 7-gate water bloom algae specific primers for blue-green algae, green algae, diatom, euglena, dinoflagellate, chrysophyta and cryptoalga; s3, based on the qPCR standard curve, calculating the copy number of the 16SrRNA / 18SrRNA gene of the seven water bloom algae; s4, when the gene expression quantity of a certain algal bloom algae continuously reaches 106-7 copy number / mL for 7-12 days, determining that the algal bloom algae is in a window phase; according to the threshold value of the gene expression quantity of the water bloom algae 16SrRNA / 18SrRNA, the window period of water bloom algae cells can be accurately recognized, so that early warning of the algae bloom risk in the lake and reservoir water source is achieved, and early warning of algae bloom outbreak in the lake and reservoir water source is achieved one week or above in advance.

The invention discloses a lake and reservoir dominant algae community structure prediction method and system based on machine learning and a storage medium, and relates to the technical field of water environment monitoring and ecological prediction. Comprising the following steps that multi-source heterogeneous spatio-temporal data are obtained and fused, and the multi-source heterogeneous spatio-temporal data are historical time sequence data of a target water area; generating a feature vector from the fused multi-source heterogeneous spatio-temporal data; constructing a multi-output regression machine learning model, and inputting the feature vector into the multi-output regression machine learning model for training to obtain a multi-output prediction model; and inputting real-time monitoring data into the multi-output prediction model to generate a prediction result of a future dominant algae community structure. According to the method, whether cyanobacterial bloom or diatom bloom exists in the future can be clearly early warned, so that a manager can take targeted measures, for example, a specific algicide or ultrasonic equipment is used for the cyanobacteria, blind pesticide application is avoided, and the cost and the secondary pollution risk are reduced.

The present invention discloses a phenyl ether-based bimetallic organic framework antifouling material, its preparation method, and its application, belonging to the technical field of marine antifouling materials. The preparation method is as follows: 1) A phenyl ether organic ligand containing a carboxyl group, a zinc salt, and a lanthanide metal salt are dissolved in a polar organic solvent and placed in a sealed reaction vessel for a coordination reaction, whereby the zinc and lanthanide metal ions form coordination bonds with the carboxyl groups, bridging the metal ions to form a tetrametallic cluster; the resulting crystals are washed and dried to obtain the phenyl ether-based bimetallic organic framework; 2) the phenyl ether-based bimetallic organic framework is ground and uniformly dispersed in an aqueous polyurethane resin, followed by thorough mixing to obtain the phenyl ether-based bimetallic organic framework antifouling material. The present invention also provides the application of the antifouling material in marine antifouling and anticorrosion applications. The antifouling material prepared by the present invention has low synthesis cost and difficulty, stable properties, and significant inhibitory effect on the settlement of organisms such as diatoms and barnacles.

The invention relates to a jellyfish disaster early warning method, jellyfish disaster early warning equipment and a medium. The method comprises the following steps: acquiring the copepod dominance of a target water area on a date T and the diatom abundance of a date T-# imgabs0 #; if the copepod dominance is equal to or greater than a first threshold value and the diatom abundance is equal to or greater than a second threshold value, determining a jellyfish outbreak risk index of the target water area on a date T + # imgabs1 # according to the copepod dominance and the diatom abundance; otherwise, inputting the copepod dominance of the target water area on the date T, the diatom abundance of the date T-# imgabs2 # and the water quality parameter of the date T into a target prediction model corresponding to the target water area, and outputting a jellyfish outbreak risk index of the target water area on the date T + # imgabs3 #; and determining a jellyfish outbreak risk level of the target water area according to the jellyfish outbreak risk index. According to the scheme, the jellyfish outbreak risk index can be predicted in advance by combining the copepod dominance degree of the date T and the diatom abundance of the date T-# imgabs4 #.

The invention discloses a preparation method and application of an anti-fouling coating system capable of preventing biological adhesion, the anti-fouling coating system capable of preventing biological adhesion comprises a primer and a topcoat, and the primer comprises a first component and a second component. According to the preparation method and application of the anti-fouling coating system capable of preventing biological adhesion, the anti-traditional thinking is used for developing an anti-fouling coating, the surface coating is used for developing a nano composite particle coating, a high-surface-energy nano material is firstly used as a basis, a dark catalytic electrolysis technology is matched for preparation, the characteristic of high surface energy of the nano material is adopted, and the anti-fouling coating system capable of preventing biological adhesion is prepared. Energy is absorbed, stored, converted and released through the composite nano-material, the nano-material breaks walls of marine microorganisms and a generated electric field effectively prevents generation of a biological membrane, then growth of marine bacteria, shells and benthic diatom is effectively inhibited, meanwhile, two-dimensional nano-graphene is adopted to replace traditional graphene oxide for modification, the overall engineering is simple, and the cost is low. More atoms are distributed on the surface, and the coating surface has higher energy.

The application discloses a kind of long-acting targeted cultivation alga high-density complex of water body and preparation method thereof, it is related to aquaculture field, the high-density complex includes the following weight parts components: small material premix 3-5 parts, sodium chloride 35-40 parts, gelatinized starch 1-3 parts, attapulgite 40-50 parts, cement 3-7 parts, titanate coupling agent 1-3 parts, molasses 2-4 parts and purified water 1-5 parts.The preparation method of the high-density complex includes the following steps: small material premix is subpackaged, is stirred uniformly with other components and adds molasses to carry out humidity control, then subpackaging and compression molding are formed, in turn plastic envelope, package and film winding.The long-acting targeted cultivation alga high-density complex of water body provided in the application can directional cultivation diatom and chlorella, and continuously release functional material, stabilize the abundance of beneficial algae, effectively solve the problem that directional cultivation beneficial organism cannot be carried out and functional material release speed is too fast.

The invention relates to the technical field of microbial culture, in particular to a heterotrophic culture method of benthic diatom, which comprises the following steps: S1, adding benthic diatom into an improved SE culture medium, and culturing for 5-7 days until OD540 is 0.8-1.2 to obtain a benthic diatom seed solution; according to the method disclosed by the invention, a nutrition system is constructed by taking waste glycerol as a carbon source and sodium alginate coated urea as a slow-release nitrogen source, and the benthic diatom, nitrogen-fixing bacteria and phosphate solubilizing bacteria are co-cultured on a porous ceramic carrier to be cultured under a dark condition, so that compared with the prior art, the method disclosed by the invention thoroughly gets rid of the dependence on illumination, and the yield is increased. The rapid, high-yield and stable heterotrophic culture of the benthic diatom is realized, meanwhile, the raw material and energy consumption cost is greatly reduced, and the resource recycling rate is improved; the obtained diatom biomass can be used for aquatic bait, biological energy, environmental restoration and development of high-added-value products, and has a wide industrial application prospect.

The application belongs to the technical field of cosmetics, and discloses a fucoidan polysaccharide composition with bacteriostatic efficacy, and a preparation method and application thereof. The fucoidan polysaccharide composition comprises phaeophycus triquetrum fucoidan, small new moon rhombus fucoidan and false micro-halochain fucoidan, and the mass ratio of the phaeophycus triquetrum fucoidan, the small new moon rhombus fucoidan and the false micro-halochain fucoidan is (1-2):(1-2):(1-2). The fucoidan polysaccharide composition is prepared by compounding specific phaeophycus triquetrum fucoidan, small new moon rhombus fucoidan and false micro-halochain fucoidan, has a synergistic effect, and has excellent antibacterial efficacy. When the fucoidan polysaccharide composition is applied to cosmetics, it has good formula adaptability, does not affect the exertion of efficacy and the stability of the cosmetics.

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 discloses a diatom and dinoflagellate growth and population competition simulation method and system under pesticide stress. The method comprises the following steps: acquiring ecological environment parameters in a target sea area; the method comprises the following steps: constructing a pesticide biogeochemical process module, coupling the pesticide biogeochemical process module with a nutritive salt-diatom-dinoflagellate ecological dynamic model (NbPD), introducing photosynthesis enzyme activity regulation factors and pesticide effect factors of diatom and dinoflagellate into the coupled model, and establishing an agricultural input chemical geochemical-ecological dynamic model; based on the obtained ecological environment parameters, the model is used for simulating the growth process and population competition process of diatom and dinoflagellate after multiple groups of agricultural chemicals are added, and a dynamic response and dominant species replacement trend mechanism of the diatom and dinoflagellate is obtained. By means of the method, the ecological competition mechanism and succession path between the marine diatom and the dinoflagellate under the pesticide stress condition can be accurately reproduced, and a scientific tool and a simulation basis are provided for revealing the evolution rule of a phytoplankton community structure.

The present invention discloses a method for processing marine unicellular diatoms and a processed product thereof, comprising the following steps: step A: preparing fresh algae mud using fresh marine unicellular diatoms, and obtaining the pickled algae mud after pickling; step B: dissolving the polysaccharide in the pickled algae mud by microwave heating using urea-alkaline solution to obtain a first solution, ultrafiltering the first solution and concentrating, and obtaining chitosan composite polysaccharide powder through vacuum freeze drying; step C: granulating the chitosan composite polysaccharide powder using an ethanol-glycerol mixture, and obtaining a processed product after drying; the processed product is a chitosan composite polysaccharide particle, including chitosan and its derivatives, hemicellulose and cellulose. The processing method provided by the present invention is simple, and raw materials are easy to breed and enrich, and the processed chitosan composite polysaccharide has moisture-retaining properties and can be widely used in aquaculture feed, biomedicine, environmental engineering, engineering materials or chemical and chemical fields.

The invention provides a durable antibacterial environment-friendly marine antifouling coating for machinery as well as a preparation method and application of the durable antibacterial environment-friendly marine antifouling coating, and belongs to the technical field of marine antifouling materials. Nano titanium dioxide; a curing agent; a pigment; the fluorine-containing quaternary ammonium salt polysiloxane prepolymer is prepared by carrying out dehydration condensation reaction on a quaternary ammonium salt silane monomer A, a phenyl-containing silane monomer B and a fluorine-containing silane monomer C in an organic solvent under the action of a basic catalyst; the quaternary ammonium salt compound adopted by the invention has the characteristics of excellent environmental compatibility, outstanding fast-acting antibacterial and algae-killing properties and the like, can endow the surface of a material with continuous microbial inhibition and killing properties, and blocks the colonization and reproduction chain of marine attachment organisms from the source by destroying the integrity of bacterial cell membranes and interfering the activity of biological enzymes, so that the marine attachment organisms can be effectively inhibited. The resistance of the coating to typical fouling organisms such as barnacles and diatom is obviously improved; and meanwhile, the modulus and hardness of the coating can be remarkably improved, so that the coating can better resist scratch, abrasion and collision.

The application provides a method for preparing a coating layer by using diatom shells and application, comprising the following steps: 1, adding distilled water into diatom mud or diatom dry powder, adjusting pH value by using strong acid, and then standing to obtain precipitate, centrifuging and washing the obtained precipitate to obtain primary diatom shells; 2, digesting or calcining the primary diatom shells to remove organic matter to obtain inorganic diatom shells; 3, mixing the inorganic diatom shells or the primary diatom shells with anhydrous ethanol and ammonia water to obtain diatom shell sol; and 4, coating the diatom shell sol on the surface of a substrate and heat treating to obtain a coating layer. The application utilizes the porous structure, large specific surface area and high light trapping efficiency of diatom shells, and prepares diatom shell sol by using diatom mud or diatom dry powder as raw material to form a coating layer on a substrate, without the need of complex pretreatment and modification steps, so that the coating layer has high light transmittance, hydrophobic characteristics, good antireflection effect, and is widely applied to solar cells, automobile, greenhouse and building glass.

This application discloses a composite diatom powder live food water purifier for purifying water quality, a preparation method, and applications. The composite diatom powder live food water purifier comprises, by weight, 90-95 parts of a dormant diatom strain and 5-10 parts of a support matrix. The dormant diatom strains include dormant marine strains and dormant freshwater strains. The dormant marine strains include Isochrysis, Thalassiosira wissenii, Thalassiosira pseudodwarf, Nitzschia closterium, Cyclotella cryptica, Cyclotella meni, and Phaeodactylum triangularis. The dormant freshwater strains include Achillea millefolium, Navicula, and Cylindrospermum tenuis. The support matrix comprises filter soil. The composite diatom powder live food water purifier provided in this application has the ability to withstand harsh aquatic environmental conditions, remove ammonia, and produce high oxygen, and plays an important role in improving water quality.

The invention relates to the technical field of water body microorganism growth pollution and adhesion fouling treatment, in particular to a microorganism inactivation device and method for supplying power to a copper electrode through a friction nanometer generator, and the microorganism inactivation device comprises the friction nanometer generator, a copper oxide nanowire modified copper electrode, an electric field action area and a control system. A high-voltage and low-current electric field generated by the friction nano-generator is combined with the copper oxide nanowire modified copper electrode, dual synergy is achieved, a stable and controllable electric field source can be provided, the copper oxide nanowire modified copper electrode modifies the copper oxide nanowire with a high aspect ratio on the surface of a copper net, and when the copper electrode is powered, the copper oxide nanowire with the high aspect ratio can be provided for the copper electrode. Due to the lightning rod effect of the nanowires, the electric field of the tip part can generate an amplification phenomenon, and the remarkably enhanced electric field intensity can more effectively drive diatom and algal microorganisms in a water body and strongly destroy the integrity of cell membranes, so that cell contents are quickly leaked, and efficient physical inactivation is realized.

Methods for the fermentative production of O-phosphoserine, cysteate, or taurine in microbes or unicellular organisms that contain a serB mutation that either decreases serB expression, reduces the amount of the serB gene product or results in a serB gene product with low enzymatic activity. Genetic modifications of the O-phosphoserine, cysteate, or taurine and / or substrate biosynthetic pathways in unicellular organisms that include bacteria, algae, microalgae, diatoms, yeast, or fungi are disclosed. Also disclosed are fermentation and processing methods for the production of various O-phosphoserine-, cysteate-, or taurine-containing products and the use of the cells, fermentation broth or extracts that contain O-phosphoserine, cysteate, or taurine to produce products for use in food, feed, beverages, dietary and health supplements, cosmetics, personal care, pharmaceuticals, agricultural production, or surfactants.

The invention relates to a ship body steel structure composite electrogenesis bacterium biological membrane anticorrosive coating and a preparation method and application thereof, and belongs to the technical field of marine ship steel structure anticorrosive coating preparation. According to the specific scheme, the ship body steel structure composite electrogenesis bacterium biological membrane anticorrosive coating comprises a coating I and a coating II, the outer surface of a ship body steel structure is coated with the coating I, and the outer surface of the ship body steel structure is coated with the coating II; the surface of the coating I is coated with the coating II, the coating I comprises diatom ooze I and seawater salt-tolerant anaerobic electricity-producing bacteria, and the seawater salt-tolerant anaerobic electricity-producing bacteria grow in pores of the diatom ooze I; the coating II comprises diatom ooze II and seawater salt-tolerant facultative anaerobic saccharomycetes, and the seawater salt-tolerant facultative anaerobic saccharomycetes grow in internal pores of the diatom ooze II. Corrosion prevention of the ship body steel structure is achieved through the environment-friendly microbial electrochemical technology, traditional epoxy resin and polyurethane anti-corrosion paint are replaced, and the technology belongs to the environment-friendly anti-corrosion technology.

The invention discloses a method for identifying biological siliceous shale, which comprises the following steps of: firstly, identifying a bright stripe layer in the biological siliceous shale as a diatom, calcium algae and radiation insect concentrated development section by utilizing an optical microscope, then quantitatively identifying the total siliceous mineral content of a sample by utilizing energy spectrum minerals, and measuring organic matters and porosity by utilizing a field emission scanning electron microscope. According to the method, the biological siliceous shale is identified from different microscales by adopting three methods, the results are mutually verified, and the method provides effective technical support for evaluating favorable layer sections of the shale and is of great significance for improving the exploration and development effect of shale gas.

The invention discloses an acid-resistant microalgae construction method based on bicarbonate ion transporter protein, and belongs to the field of biology and molecular biology. The method specifically comprises the following steps: taking Phatr3J33543 with a sequence structure as shown in SEQ ID No.1, Phatr3J50516 with a sequence structure as shown in SEQ ID No.2 or Phatr3Jdraft1806 with a sequence structure as shown in SEQ ID No.3 as a target gene, removing a termination codon of the target gene, and connecting a fluorescent protein gene with an initiation codon removed through a DNA (Deoxyribose Nucleic Acid) sequence for coding glycine to obtain a recombinant gene; inserting the recombinant gene into multiple cloning sites of a pPhaNR plasmid to obtain a vector plasmid; introducing the carrier plasmids into diatom cells through electroporation, and inoculating the diatom cells to an ESAW solid selective culture medium containing bleomycin to grow brown algal colonies; selecting the algal colonies with fluorescent protein signals from the algal colonies, namely the acid-resistant engineering algae. Compared with wild algae, the acid resistance of the engineering algae obtained by the invention is obviously improved. The method has important reference significance on acid-resistant diatom cultivation.

This invention discloses a method for large-scale freshwater silver carp and bighead carp farming, comprising the following steps: S1: Selecting a large reservoir or lake surface; S2: Stocking fry weighing 0.15–0.25 kg from the current year's breeding period between late October and mid-December; wherein the ratio of silver carp to bighead carp is 7:3–6:4; S3: After a growth cycle of 1.5–4 years, the silver carp and bighead carp grow into adult fish, which are then harvested and marketed. Since silver carp primarily feed on phytoplankton, especially diatoms and green algae, and are typical filter-feeding fish, a higher proportion of silver carp is used, thus enhancing the water purification effect. Furthermore, the reservoirs in the Lianyungang area are mostly flatland reservoirs, where silver carp thrive in shallow water; therefore, this stocking ratio of bighead carp to silver carp is also suitable. This method achieves water purification through the farming of large-scale freshwater silver carp and bighead carp. First, put fish food outside the large mesh net; this will help avoid the impact of fishing on the growth of smaller fish.

Methods for the fermentative production of O-phosphoserine, cysteate, or taurine in microbes or unicellular organisms that contain a serB mutation that either decreases serB expression, reduces the amount of the serB gene product or results in a serB gene product with low enzymatic activity. Genetic modifications of the O-phosphoserine, cysteate, or taurine and / or substrate biosynthetic pathways in unicellular organisms that include bacteria, algae, microalgae, diatoms, yeast, or fungi are disclosed. Also disclosed are fermentation and processing methods for the production of various O-phosphoserine-, cysteate-, or taurine-containing products and the use of the cells, fermentation broth or extracts that contain O-phosphoserine, cysteate, or taurine to produce products for use in food, feed, beverages, dietary and health supplements, cosmetics, personal care, pharmaceuticals, agricultural production, or surfactants.

The application discloses a diatomite plate-based aquaculture system and relates to the field of aquaculture, which comprises a power mechanism for agitating water and a floating body mechanism for making the power mechanism float on the water, wherein the floating body mechanism comprises a floating ball with a water inlet arranged in the water, the power mechanism is arranged above the water when the power mechanism is stopped, and the application further comprises a blocking piece for controlling the opening and closing of the water inlet based on the rotating state of the power mechanism. The diatomite plate-based aquaculture system provided by the application has the advantage that, since the power mechanism is completely arranged above the water when the power mechanism is stopped, the resistance of the power mechanism during startup is reduced, and the power mechanism is not soaked by the water when the power mechanism is in a stopped state.

This invention provides a mechanically durable, antibacterial, and environmentally friendly marine antifouling coating, its preparation method, and its application. Belonging to the field of marine antifouling materials technology, it comprises the following components: a fluorinated quaternary ammonium salt polysiloxane prepolymer; nano-titanium dioxide; a curing agent; and pigments. The fluorinated quaternary ammonium salt polysiloxane prepolymer is prepared by dehydration condensation reaction of quaternary ammonium salt silane monomer A, phenyl silane monomer B, and fluorinated silane monomer C in an organic solvent under the action of an alkaline catalyst. The quaternary ammonium salt compounds used in this invention possess excellent environmental compatibility and outstanding rapid antibacterial and algaecidal effects, endowing the material surface with continuous microbial inhibition and killing properties. By disrupting the integrity of bacterial cell membranes and interfering with the activity of biological enzymes, it blocks the colonization and reproduction chain of marine attached organisms from the source, significantly improving the coating's resistance to typical fouling organisms such as barnacles and diatoms. Simultaneously, it can significantly improve the coating's modulus and hardness, making it more resistant to scratches, abrasions, and impacts.

The present application belongs to the field of marine ecological dynamics and biogeochemical process coupling simulation technology, and particularly relates to a method for regulating marine diatom-microzooplankton competition evolution mechanism by nutrient salt-enzyme activity, comprising the following steps: constructing a model according to the double-algae niche competition principle of nutrient salt and enzyme activity regulation, introducing an enzyme activity regulation submodule, and regulating the growth, metabolism, secretion and death processes of phytoplankton. The model comprises a nutrient salt module, a phytoplankton module and a detritus module, which are respectively used for simulating the migration and transformation process of nutrient salt in the marine environment, the growth and death process of phytoplankton and the transformation process of detritus. The absorption, assimilation and transformation processes of nutrient salt are regulated by enzyme activity, and the detritus is divided into cell detritus and particulate detritus, so as to distinguish the loss of dead cell organic matter and the mineralization process of detritus, and the cell disintegration process is supplemented. Finally, the phytoplankton growth and death dynamics parameters are simulated by the model, and the mechanism of marine diatom-microzooplankton competition evolution is analyzed.

The invention relates to the technical field of carbon dioxide capture and adsorption, in particular to a calcium oxide-based adsorbent for high-temperature carbon dioxide capture and a preparation method. The adsorbent comprises a biomass calcium carbonate matrix, a skeleton proppant, a Ce-Zr-Cu composite oxide bifunctional aid, a conductive dispersant, a macropore-mesopore-micropore hierarchical porous structure formed by biomimetic mineralization of a biological template agent, and an amino functional group grafted by a surface modifier. The biomass calcium carbonate matrix is formed by compounding egg shells, shells and coral bones according to the mass ratio of 1: 1: 0.5; the skeleton proppant is formed by compounding a ZSM-5 molecular sieve and mesoporous gamma-aluminum oxide according to a mass ratio of 2: 1; in the scheme, biomimetic mineralization is realized by compounding a ZSM-5 / gamma-alumina skeleton and a Ce-Zr-Cu ternary auxiliary agent, introducing a PAN-based nitrogen-doped carbon network and matching with a diatom-egg white biological template, and APTES + PEI surface modification is performed, so that the problems of poor sintering, poor circulation, agglomeration and the like of a traditional adsorbent are solved in a targeted manner, double-temperature-zone adsorption is also realized, and the comprehensive performance is greatly improved.

The invention provides a breeding method for promoting growth of decapterus maruadsi, and belongs to the technical field of breeding of decapterus maruadsi. An indoor circulating water system is adopted, diatom is put in advance, the water environment can be more stable, and natural bait is provided for fry. The density is reduced by dividing the fishes into different ponds according to the sizes of the fishes, and extrusion competition among the fishes is reduced. The feed is specially prepared according to different growth stages of the fish, components for enhancing immunity are added, and the feed is fed according to the proportion every day, so that the fish grows fast and is less ill. Meanwhile, the water temperature and the illumination time are well controlled, and the favorite growth environment is simulated. Under the combined action of the measures, the good effects of accelerating the growth of the decapterus maruadsi, shortening the breeding time, reducing the occurrence of diseases and improving the overall yield are finally achieved.

This invention discloses a method for regulating algal communities dominated by diatoms, relating to the field of river and lake water environment technology. It involves setting up a flotation purification zone, adding flocculants to initially settle large impurities, and simultaneously adding an air flotation device in this zone to allow floatable impurities to float and be dehydrated and removed by a screen. A sedimentation purification zone is set up, adding flocculants to cause colloidal particles to collide and form flocculent precipitates. An algal community regulation zone is set up to supplement carbon sources, enhance denitrification, reduce total nitrogen, and inhibit diatom growth. An enhanced treatment zone is set up, using floating island ecological walls to further purify the water, utilizing planktonic microorganisms to absorb wastewater and phytoplankton photosynthesis to achieve water purification. This invention uses diatoms as the dominant species, inhibiting their growth through water treatment, allowing green algae to gradually become the dominant species. This method effectively improves water quality, regulates algal communities, shifts the dominance of diatoms to green algae, eliminates water discoloration, and has broad application prospects.

The invention provides a reutilization treatment method of a seawater diatom culture solution. The reutilization treatment method comprises the following steps: S1, sequentially performing flocculation and primary filtration on a seawater diatom culture solution which is subjected to seawater diatom culture and harvest treatment, so as to obtain a first filtrate; s2, sequentially carrying out macromolecular substance degradation and separation treatment on the first filtrate to obtain a recycled culture solution; and S3, mixing the reutilized culture solution with the seawater diatom species, and culturing new seawater diatom. The reutilization treatment method disclosed by the invention can be suitable for cyclic utilization of the culture solution in a large-scale seawater diatom culture process, and plays an important role in improving economic benefits and ecological benefits of diatom culture.

The invention discloses a diatom-mineral complexing agent, preparation and application thereof and a rice cultivation method, and belongs to the technical field of rice diatom symbiotic cultivation methods. The preparation method of the diatom-mineral complexing agent comprises the following steps: infiltrating particles of a sterilized natural silicon-rich porous mineral with the silicon dioxide content of more than 30wt% into diatom liquid to obtain a diatom infiltrated mineral; and carrying out solid-liquid separation on the diatom infiltrated mineral, and drying to obtain the diatom-mineral complexing agent. The obtained diatom-mineral complexing agent can remarkably prevent diatom applied to a paddy field from being damaged by animal predation, silicon deficiency, insecticides and the like, long-term stable growth, proliferation and erection of the diatom are maintained, and the yield of rice is further increased.

The invention discloses an aquaculture system based on diatom plates, and relates to the field of aquaculture, the aquaculture system comprises a power mechanism used for stirring water and a floating body mechanism used for enabling the power mechanism to float on the water; the floating body mechanism comprises a floating ball, and a water inlet formed in a water body is formed in the floating ball; when the power mechanism stops, the power mechanism is arranged above the water body; the device further comprises a plugging piece, and the plugging piece controls opening and closing of the water inlet based on the rotating state of the power mechanism. According to the aquaculture system based on the diatom plate, due to the arrangement, the power mechanism is completely arranged above the water body when the power mechanism stops, so that the starting resistance of the power mechanism can be reduced, and the power mechanism cannot be soaked by the water body when the power mechanism is in a stopped state.