70 results about "Cyanobacteria bloom" patented technology

The invention discloses a method for controlling cyanobacteria bloom, which belongs to the technical field of water pollution treatment. The method for controlling the cyanobacteria bloom comprises the steps of: (1) utilizing an acquisition system with a sucking disk to perform suction acquisition on cyanobacteria on the water surface of a water body; (2) pumping cyanobacteria water which is subjected to suction acquisition into a conveying pipeline through a suction pump, and conveying the cyanobacteria water to a storage tank; (3) pumping the cyanobacteria water in the storage tank into a dosing system through a screw pump, adding a flocculating agent into the cyanobacteria water, and mixing evenly to ensure that the cyanobacteria is flocculated; (4) sending the cyanobacteria water with the flocculated cyanobacteria into a settling separation system for solid-liquid separation to obtain water and cyanobacteria mud with the water content of 80 percent, sending the water obtained after the solid-liquid separation to a clear water tank for temporary storage through the settling separation system, and then draining the water into the water body through an overflow port; and (5) separating the obtained cyanobacteria mud to obtain cyanobacteria mud with the water content less than 70 percent after the drying. The method for controlling the cyanobacteria bloom has the advantages of environmental protection, low cost and convenient operation, and can realize the safe disposal and resource utilization of the cyanobacteria bloom.

The invention relates to a cyanobacteria biomass spatial-temporal change monitoring and visualization method based on a remote sensing image. The method comprises the following steps: (1) pre-processing the remote sensing image of a research region, and constructing a normalized difference cyanobacteria bloom index (NDI-CB); (2) optimizing characteristics of the remote sensing image by using a characteristic optimization model based on VPRS (Variable Precision Rough Set)-GID (Grey Incidence Decision), and obtaining an optimized multi-characteristic space; (3) establishing a double-weighted SVM (Support Vector Machine) classification model based on a wavelet kernel according to the multi-characteristic space, performing extraction identification and change detection on the spatial distribution information of cyanobacterial bloom, and performing comprehensive verification and precision analysis by combining field observation data; and (4) performing overlapping display on the processed remote sensing image, GIS (Geographic Information System) vector data and the field observation data, thereby realizing the analog simulation of spatial-temporal change processes and rules of erupting the cyanobacterial bloom. Compared with the prior art, the cyanobacteria biomass spatial-temporal change monitoring and visualization method based on the remote sensing image has advantages of high cyanobacteria identifying precision and reliability, and the like, and is beneficial to analyzing and judging of causes and distribution changes of the cyanobacterial bloom.

The invention discloses a cyanobacterial bloom predicting method based on a non-linear kinetic time-series model, which belongs to the water environment predicting field. The method comprises the following steps: using the blue algae growth rate as a time-varying parameter; creating a non-linear kinetic time-series model for the cyanobacteria growth with double nutrient salt cycling; using the combination of the numerical algorithm and the intelligent evolutionary algorithm, optimizing the constant parameters in the non-linear kinetic time-series model for the cyanobacteria growth; through setting the multivariate time-series model to realize the prediction of the time-varying parameter and the cyanobacteria biomass and through using the bifurcation theory and the central manifold theory to make a nonlinear kinetic analysis of the cyanobacteria growth time-varying system, obtaining the outbreak conditions for a cyanobacteria bloom so as to make an early warning of the bloom outbreak. The method proposed by the invention not only determines the conditions for a cyanobacteria bloom outbreak, but also improves the bloom prediction accuracy, providing an effective reference for an environmental protection department and governance decisions for water environment treatment.

The invention relates to a comprehensive monitoring and data mining system and method for algae bloom of lake, wherein, the method comprises acquiring monitoring indicator data related to algae bloom of lake by three ways, i.e., remote sensing monitoring, automatic monitoring and manual surveying, and transmitting the acquired data to a data center by Internet; performing data backup and data preprocessing of the received data in the data center, including temporal interpolation, spatial interpolation and outlier determination and processing; transmitting the preprocessed data to a database for storage; performing computation of 3D numerical model of lake according to the data source stored in the database, assessing the risk of algae bloom of the lake to be monitored according to the simulation data of the numerical model, and displaying predictive warning information on algae bloom of the lake on a public platform.

The invention discloses a method for discriminating an overwintering-recovery period boundary of overwintering cyanobacteria. The method comprises the following steps of carrying out RNA extraction and purification on a water sample from a cyanobacteria bloom region and indoor cultured microcystis; carrying out reverse transcription to obtain cDNA; with the cDNA as a template, carrying out real-time fluorescence quantitative PCR amplification; amplifying genes of microcystis gas vesicles by virtue of a primer gvpC; specifically amplifying microcystis 16srRNA reference genes by virtue of a primer Micr; after the PCR is completed, exporting correspondingly threshold cycle values of which the difference values are taken as corrected cell copy numbers, wherein the difference between the cell copy number of the wild sample and the cell copy number of the indoor sample is taken as a relative cycle number of the wild target genes and marked as deltadelta Ct; calculating the relative expression level by virtue of 2-deltadelta Ct, plotting a curve with time as an abscissa and the values of 2-deltadelta Ct as an ordinate and determining the overwintering-recovery period boundary of overwintering cyanobacteria according to the curve. By the method, a plurality of samples can be simultaneously analyzed and the method has the advantages of good repeatability and accuracy and short detection time.

The invention discloses a cyanobacteria bloom control method based on the cultivation of floating rice. Rice sprouts at 5-trifoliate stage are fixed on a polystyrene foam board by a sponge, then the polystyrene foam board floats on a water body which needs to be controlled for cultivation, rice is duly harvested, and the polystyrene foam board is recovered. The cyanobacteria bloom control method can effectively control water bloom in lakes; and the cyanobacteria bloom control method is applied to ensure that the count of blue-green algae cells in eutrophic water bodies of the lakes is decreased to less than 1,000 ml<-1> within ten days in summer, thereby apparently improving the water quality of the eutrophic water bodies.

The invention discloses a method for formation of bioflocs by cyanobacterial bloom. The method includes: acquiring cyanobacterial bloom containing in-situ water from cyanobacterial bloom occurred water and performing proper concentration to keep the total nitrogen concentration of the concentrated cyanobacterial bloom system at 40-150mg / L, the dissolved total organic carbon concentration at 40-150mg / L, and the ratio (mass ratio) of total nitrogen to total phosphorus at 3:1-6:1; maintaining aeration disturbance of the concentrated cyanobacteria bloom at 22-38DEG C for 20-25 days so as to see formed bioflocs, in which a lot of navicula, Stauroneis and other diatoms plants appear. The method can transform cyanobacterial bloom into heterotrophic bacteria preponderant bioflocs, can promote harmless treatment and utilization of nitrogen in water and accelerate conversion of water nutrients, can be directly used for treatment of cyanobacterial bloom, and the formed bioflocs can be directly used for aquaculture or sewage purification.

The invention relates to a method for monitoring the condition of cyanobacteria bloom. The method comprises the following steps of: monitoring a water body at fixed time by a computer through an external monitoring device so as to obtain an image sample; pre-processing the image by the computer so as to eliminate influence of noise information; extracting a feature vector, and classifying the images by a K-means algorithm; obtaining cyanobacteria bloom condition information; and storing a judgment result of the image in a memory connected to the computer as history data. The clustering analysis is applied to monitoring of the condition of the water surface, so that the information of the cyanobacteria bloom is obtained. For the influence of the light on the image, by adopting an HSV (Hue Saturation Value) color space, a V component is eliminated, thus the judgment precision is improved effectively. The invention has the advantages of low cost, good instantaneity and high reliability.

The invention is a flocculant for removing Cyanobacteria bloom microcystis, a preparation method and applications thereof, wherein the flocculant is prepared from clay and chitosan. The preparation method comprises: drying clay, crushing to achieve a fineness of 100 [mu]m, dissolving chitosan by using hydrochloric acid having a concentration of 1% (wt%) to obtain a 1 mg / mL chitosan hydrochloric acid solution, sufficiently impregnating with the clay powder, and drying to obtain the flocculant. The invention provides the modified clay flocculant for removing the microcystis during the generation of Cyanobacteria blooms, the preparation method and applications thereof, wherein the microcystis in the Cyanobacteria bloom water can be rapidly and rapidly removed, the emergency treatment on the Cyanobacteria bloom generation can be achieved, the removing effect is good, the effect is rapid, the operation is simple, and the important theoretical and practical significance is provided for the rapid treatment of the Cyanobacteria bloom generation; and the clay around the Cyanobacteria bloom generation soil can be used to modify, such that the long-distance transportation cost of the flocculant can be saved, and the economic benefits are impressive.

The invention discloses an OLCI-based remote sensing estimation method for cyanobacteria biomass ratio of inland eutrophic lakes. The method comprises steps of: extracting a research area of inland eutrophic lakes from OLCI remote sensing image data, and preprocessing and obtaining remote sensing reflective rate of a corresponding water body in the area; resolving a ratio of remote sensing reflective rates of a sixth wave band to a tenth wave band, if the ratio is greater than a preset threshold, recording the ratio as an extremely high gradient, and outputting a result; if the ratio is less than the threshold, acquiring backscatter value at 778 nanometer, absorption coefficients at 620 nanometer and 665 nanometer, and absorption coefficient of chlorophyll a at 665 nanometer; creating a normalized difference index representing cyanobacteria biomass ratio at current image element; and performing above steps on each image element in the research area, so as to obtain space distribution of cyanobacteria biomass ratios of inland eutrophic lakes. The method greatly improves cyanobacteria detection efficiency and scale, providing reference for warning cyanobacteria bloom.

The invention discloses a blue algae inhibitor composition which is characterized by being prepared from the following raw materials in parts by weight: 30-35 parts of aluminum polychlorid, 18-24 parts of aluminum potassium sulfate, 13-15 parts of erythrocin, 15-18 parts of monocalcium phosphate, 14-16 parts of bacillus powder, 13-17 parts of vitamin B, 15-18 parts of calcium bicarbonate, 17-19 parts of epidesmine, 11-13 parts of lilium brownie juice, 2-4 parts of honeysuckle, 3-5 parts of radix stemonae, 1-3 parts of radix sophorae flavescentis, 3-5 parts of black nightshade and 2-5 parts of radix euphorbiae lantu. When the blue algae inhibitor composition is used in the process of preventing and treating cyanobacteria bloom in aquaculture water, no death of farmed animals due to oxygen deficit can be caused, the pollution of heavy metals can be reduced and blue algae can be effectively controlled, and the cyanobacteria bloom is unlikely to re-occur.

The invention relates to a cyanobacteria bloom collecting processor, and belongs to the field of cyanobacteria bloom processing. The processor comprises a floating unit which is provided with a propeller. A collection processing unit arranged at the floating unit comprises a collector and a desiccation component. The position, located at the front end of the floating unit in the forward direction,of the collector is provided with a cyanobacteria collecting port, and the collector is internally provided with a drainage pump used for discharging water into a water body, and a cyanobacteria pulplifting pump communicating with the desiccation component. The processing method comprises the steps that the collection processing unit is driven by the floating unit to move to the position of a cyanobacteria bloom water body, and the cyanobacteria is collected into the device by the collector through the cyanobacteria collecting port; and clear water in the collector is discharged into the water body by the drainage pump. The cyanobacteria collection and processing operations are simple, and the collection efficiency is high; and the cyanobacteria is easy to process after desiccation.

The invention relates to a cyanobacteria bloom collecting-fishing treatment and preventing method. The cyanobacteria bloom collecting-fishing treatment and preventing method specifically comprises thesteps that, a, as a hull advances, a cyanobacteria bloom collecting-fishing system installed on the hull performs continuous cyanobacteria fishing; b, the collected cyanobacteria are added into a screw extruder for extrusion dehydration, and the collected wastewater with different MC content is collected in stages; c, the wastewater collected in the early stage of extrusion is irradiated with ultraviolet rays of wavelength 238-254 nm for 5-10 minutes; and d, the dehydrated cyanobacteria enter a heating copper sleeve for heating and inactivation, and the subsequent treatment is even directly discharged into lake water for microbial degradation. The cyanobacteria bloom collecting-fishing treatment and preventing method has the beneficial effects that cyanobacteria bloom can be effectively collected and fished, efficient and low-cost treatment is carried out, and the occurrence and worsening of the cyanobacteria bloom are further contained.

The invention provides a method for rapidly targeted eradication of cyanobacteria bloom in situ by algae-capturing micro-bubbles. In the method, a bubble generating solution prepared by compounding acoagulant and a surfactant for high-speed stirring generates a large number of micro-bubbles. As the surface of the micro-bubbles is positively charged, the micro-bubbles can be firmly combined with negatively charged algae cells through electrostatic force and flocculation in a short time to achieve the aim of targeted removal of cyanobacteria, algae density monitoring is carried out on a treatedbloom area for 8 to 10 days, no risk of water bloom re-eruption is found, and since the method and the device have better treatment effects on water bodies with different algae densities, the methodand the device can be used for treating the water bloom in early warning period, initial period and outbreak period.

The invention relates to the technical field of treatment of water, wastewater, sewage or sludge, particularly to a cyanobacteria bloom treatment apparatus and a cyanobacteria bloom treatment method.According to the present invention, a ship is provided with a UV / H2O2 cyanobacteria treatment device and an energy supply device, the UV / H2O2 cyanobacteria treatment device is connected to the energysupply device, the UV / H2O2 cyanobacteria treatment device comprises an ultraviolet part and a hydrogen peroxide releasing part, the ultraviolet part comprises an ultraviolet lamp tube, and the hydrogen peroxide releasing part comprises a hydrogen peroxide conveying device; and through the UV / H2O2 cyanobacteria treatment device, cyanobacteria bloom can be subjected to environmentally-friendly double treatment, no damage is generated to the environment, the treatment efficiency is high, the treatment effect is good, algae and the generated odor substances thereof can be effectively removed, andno harmful substances are produced after the treatment with the apparatus so as to achieve the environmental protection.

The invention relates to a collection and treatment method of near-shore cyanobacteria bloom. The specific implementation steps include: a. a water pump continuously pumps water from the near-shore area to be cleaned where cyanobacteria are concentrated to a water seepage tank for filtering and seepage, cyanobacteria are collected in the water body into the water seepage tank to form accumulated cyanobacteria, and clean water filtered by the water seepage plate is discharged into the clean water area through a drainage pipe; b, the collected cyanobacteria are added into a screw extruder for extrusion and dehydration, and the MC-containing wastewater and the squeezed cyanobacteria are subjected separately collecting and treating; c, the collected wastewater is subjected to secondary treatment in an ultraviolet treatment box and an ozone treatment box in turn; d, the collected dehydrated cyanobacteria are put into a heating copper sleeve for heating and inactivation, so that they can bekept for a long time at 40-50 DEG C, the biological activity is basically lost. The invention can collect and salvage the coastal cyanobacteria, reduce the MC content in the water body, prevent the cyanobacteria from obtaining biological competitive advantages, and thereby prevent the occurrence and deterioration of cyanobacteria bloom.

The invention relates to a method for processing algae-enriching water. The method comprises the following steps of: a) obtaining algae liquid after thoroughly decomposing and hydrolyzing; b) carrying out anaerobic digestion on the algae liquid; c) carrying out anaerobic-aerobic processing on the algae liquid after the anaerobic digestion; and d) discharging the algae liquid subjected to the anaerobic-aerobic processing after nitrogen and phosphorus are absorbed by water plant. The invention also relates to an application system of the method for processing the algae-enriching water. According to the method and the system which are disclosed by the invention, the difficult problem of processing a large amount of cyanobacteria bloom in Lake Taihu can be effectively solved, organic pollutants and nitrogen and phosphorus nutrients in the algae-enriching water can be effectively removed, the purposes of biogas production by blue green algae organic biomass and the agriculture resource utilization of the nitrogen and the phosphorus can be realized while the lake water quality is directly improved, and the processed tail water can reach to a level A emission standard related to the national standard. Compared with the regular algae-enriching water gas floatation thickening method, the method disclosed by the invention has the advantages of having a good removing effect, being simple in operation and management and good in energy saving effect, greatly reducing the processing cost of the blue green algae, and having excellent social benefit and economic benefit.

The invention discloses a method based on contrast divergence. A method for predicting cyanobacteria bloom based on long-term and short-term memory network belongs to the technical field of water environment prediction. The method comprises steps of firstly, establishing a CD-LSTM model, using the improved moving average filtering algorithm to smooth the cyanobacterial bloom characterization factors; Then the influence factors of cyanobacteria bloom were reconstructed by using the contrast divergence algorithm. Finally, the LSTM model is used to predict the cyanobacteria bloom. The invention combines the contrast divergence algorithm, the moving average filter algorithm and the long-short memory network model, and provides a method based on CD-LSTM, which can improve the prediction accuracy of cyanobacteria bloom, provides a new idea for cyanobacteria bloom prediction.

The invention belongs to the technical field of environmental protection, and in particular, relates to brevundimonas diminuta and an application thereof, wherein the brevundimonas diminuta has the preservation number of CGMCC No.11571. The bacterial strain obtained through screening has strong algae dissolving effect on dominant-algae microcystis of cyanobacteria bloom, and can completely remove the microcystis under certain conditions. The bacterial strain obtained through screening is friendly to environment and cannot produce secondary pollution, can be used for production and application of novel algicides, and ultimately controls cyanobacteria microcystis bloom.

The invention relates to a pressurized turbulent mixing device, which comprises a pressure pump and a liquid suction pipe and an outlet pipe arranged on the pressure pump, and further comprises a cylinder tube closed at both ends. A hollow pipe communicated with the inner cavity of the cylinder tube is arranged inside the cylinder tube. The hollow pipe is provided with a nozzle capable of sprayingthe inner surface of the cylinder tube. The pressure pump is provided with the liquid suction pipe used for introducing a treatment liquid and the outlet pipe communicated with the left end of the cylinder tube. One end of the cylinder tube is connected with the outlet pipe, and the other end of the cylinder tube is provided with an output pipe. By smoothly and continuously converting cell colonies such as cyanobacteria cells into scattered single cells through turbulent flow, water quality disasters of cyanobacteria blooms and the like can be effectively controlled. In addition, a pressurized liquid can be instantaneously mixed with other gases or liquids under the combined action of pressure and turbulent flow. The device of the invention can be applied to the occasions where the liquidneeds to be treated in the cosmetics and pharmaceutical fields.

The invention discloses a preparation method of a modified alga flocculating agent, and an application of the alga flocculating agent in treatment of cyanobacterial bloom. Iron nitrate is fixed to negative polyacrylamide through chemical complexation and physical adsorption technologies. The surface of the modified flocculating agent has many ion properties, so the improved flocculating agent can rapidly remove microcystis. The modified flocculating agent has a good adsorption effect, like high-molecular polymers are commercial products and are cheap and easily available, and the modified flocculating agent has very high stability. The modified flocculating agent also has the advantages of non-toxicity and harmlessness to environment, human and animals, no residual, substantial improvement and purification of culture water environment, effective avoiding of the bursting of the cyanobacterial bloom, and no secondary pollution.

The invention discloses lakebed overwintering cyanobacteria provenance removing equipment and a process thereof. The lakebed overwintering cyanobacteria provenance removing process comprises the following steps of natural coagulating sedimentation, enhanced sedimentation and mechanical dehydration. Equipment for realizing the process comprises at least seven sealed cabins, a drawing head, a waterwheel, a three-dimensional travelling crane, an underwater travelling paddle wheel and a centrifugal machine. The sealed cabins form a carrier platform. The drawing head, the waterwheel, the three-dimensional traveling crane, the centrifugal machine and the underwater traveling paddle wheel are sequentially arranged on the carrier platform from left to right. The lakebed overwintering cyanobacteriaprovenance removing equipment and process are scientific, reasonable and safe and convenient to use, the lakebed overwintering cyanobacteria provenance can be removed before the cyanobacteria recovery season, the scale and time of whole lake cyanobacteria bloom in the next year are delayed, and the lakebed overwintering cyanobacteria provenance removing equipment and process have great benefits for preventing local water area algal source flooding and reducing bottom mud nutrient salt release.

A method for controlling cyanobacteria bloom is characterized in that the method comprises the following steps: A) collecting a water sample of the surface layer of a natural water area where cyanobacteria bloom occurs, allowing the water sample to pass through a microporous membrane, and concentrating the water sample by an ultrafiltration system to obtain a phycophage concentrate; B) preparing a mixed solution of the phycophage concentrate and a log-phase microcystic aeruginosa solution with degradable polyurethane foam as a carrier, adding the mixed solution into a container, adding the carrier simultaneously to fix the phycophage on the carrier; C) adding the carrier into the natural water area where cyanobacteria bloom occurs with an adding amount of the fixed phycophage carrier being 0.5-1 kg per one square meter water area. Compared with the prior art, the invention has the following outstanding advantages: 1) the phycophage obtained from a water area where cyanobacteria bloom occurs has good applicability and stability; 2) the phycophage fixed on the carrier has a high density of biomass and a strong capability to resist noxious material impact, and can maintain high efficiency and activity. 3) the phycophage and the carrier is environment-friendly.

The invention discloses a method for controlling cyanobacteria bloom, which belongs to the technical field of water pollution treatment. The method for controlling the cyanobacteria bloom comprises the steps of: (1) utilizing an acquisition system with a sucking disk to perform suction acquisition on cyanobacteria on the water surface of a water body; (2) pumping cyanobacteria water which is subjected to suction acquisition into a conveying pipeline through a suction pump, and conveying the cyanobacteria water to a storage tank; (3) pumping the cyanobacteria water in the storage tank into a dosing system through a screw pump, adding a flocculating agent into the cyanobacteria water, and mixing evenly to ensure that the cyanobacteria is flocculated; (4) sending the cyanobacteria water withthe flocculated cyanobacteria into a settling separation system for solid-liquid separation to obtain water and cyanobacteria mud with the water content of 80 percent, sending the water obtained after the solid-liquid separation to a clear water tank for temporary storage through the settling separation system, and then draining the water into the water body through an overflow port; and (5) separating the obtained cyanobacteria mud to obtain cyanobacteria mud with the water content less than 70 percent after the drying. The method for controlling the cyanobacteria bloom has the advantages ofenvironmental protection, low cost and convenient operation, and can realize the safe disposal and resource utilization of the cyanobacteria bloom.

The invention discloses a cyanobacterial bloom control agent. Copper ions are complexed and adsorbed on the surfaces of cyanobacteria cells to prepare cyanobacteria bloom control agent-cyanobacteria copper, the copper ions are insoluble in water but adsorbed on the surfaces of the cyanobacteria cells, and the cyanobacteria copper is adhered on the surfaces of the cyanobacteria blooms, sinks and floats in water, diffuses and kills the cyanobacteria cells due to good affinity with cyanobacteria. Copper ions of the product are insoluble in water, have little influence on the environment, are longin time effect, can cause slow death of cyanobacteria cells, can also act on cyanobacteria provenance at the bottom of a water body, reduce the quantity of the cyanobacteria provenance and are beneficial to control over excessive proliferation of cyanobacteria.

The invention discloses a Stenotrophomonas sp. strain and application thereof in controlling cyanobacterial blooms. A strain of Stenotrophomonas sp. Lzh-7 (CGMCC No.6548) having significant algae-lysing activity is isolated from Taihu water body. The fact is identified that the effective algae-lysing component hydroquinone is isolated and purified from the metabolites of the strain, wherein the median lethal dose (LD50) of hydroquinone to Microcystis aeruginosa 9110 is 3.9 Mug / mL and the median lethal dose (LD50) of hydroquinone to Synechococcus BN60 is 6.7 Mug / mL. The Stenotrophomonas sp. strain can be applied to the research, development and production of novel biological algaecides and eventually applied to the control of lake cyanobacterial blooms.

The invention discloses a lanthanide blue algae treating agent which is characterized by being prepared from the following raw materials in parts by weight: 26-29 parts of dibenzoyl peroxide, 20-25 parts of sodium aluminum sulfate, 19-21 parts of sodium nitrate, 18-20 parts of magnesium oxide, 17-19 parts of silver-loaded microcrystal carbon spheres, 16-18 parts of sodium silicate, 15-17 parts of calcium oxide, 19-22 parts of malt, 18-21 parts of fresh ginger, 1-3 parts of sweet wormwood, 2-4 parts of fructus kochiae and 3-5 parts of liquorice. The lanthanide blue algae treating agent disclosed by the invention has the advantage of removing various pollutants and harmful substances in a efficient and broadspectrum manner, especially has an extremely good treatment effect on eutrophication of a water body, can be used for eliminating or inhibiting the growth and the propagation of blue algae, green algae and red tide, and has extremely good purification and deodorization effects without pollution problems such as water depravation and cacosmia caused by cyanobacteria bloom, so that the lanthanide blue algae treating agent has wide application prospects.

A method for controlling cyanobacteria bloom is characterized in that the method comprises the following steps: A) collecting a water sample of the surface layer of a natural water area where cyanobacteria bloom occurs, allowing the water sample to pass through a microporous membrane, and concentrating the water sample by an ultrafiltration system to obtain a phycophage concentrate; B) preparing a mixed solution of the phycophage concentrate and a log-phase microcystic aeruginosa solution with degradable polyurethane foam as a carrier, adding the mixed solution into a container, adding the carrier simultaneously to fix the phycophage on the carrier; C) adding the carrier into the natural water area where cyanobacteria bloom occurs with an adding amount of the fixed phycophage carrier being 0.5-1 kg per one square meter water area. Compared with the prior art, the invention has the following outstanding advantages: 1) the phycophage obtained from a water area where cyanobacteria bloom occurs has good applicability and stability; 2) the phycophage fixed on the carrier has a high density of biomass and a strong capability to resist noxious material impact, and can maintain high efficiency and activity. 3) the phycophage and the carrier is environment-friendly.

The invention relates to a preparation method and applications of a modified water hyacinth algae flocculant, wherein chitosan is used as a modifier, and chitosan and water hyacinth are subjected to mixing treatment to obtain the algae flocculant. The preparation steps comprise: placing fresh root-leaf-removed water hyacinth in an oven, drying and removing water, crushing, screening, mixing the obtained water hyacinth and a chitosan solution, stirring, filtering, drying, and grinding to obtain the modified water hyacinth algae flocculant. According to the present invention, the modified water hyacinth algae flocculant for removing Microcystis during the Cyanobacteria blooms, the preparation method and the applications are provided, the modified water hyacinth algae flocculant can rapidly and effectively remove the Microcystis in the Cyanobacteria blooms, can achieve the emergency treatment on the Cyanobacteria blooms, has advantages of good removing effect, rapid effect and simple operation, and provides the important theoretical and practical significance for the rapid treatment of the Cyanobacteria blooms; and by modifying the water hyacinth around the Cyanobacteria blooms, the long-distance flocculant transportation cost is saved, and the economic benefits are great.