62results about How to "Good algae removal effect" patented technology

The invention belongs to the technical field of treatment of drinking water and particularly relates to a method for pre-oxidizing and reinforcing coagulation of algae cells and controlling release of organic substances in algae cells. Aiming at the eutrophicated pollution of surface water such as pools, reservoirs and the like, the invention provides a method of orderly adding pre-oxidant and ferrite, ferric salt and the like. The pre-oxidant inactivates the algae cells while the ferrite cancels the pre-oxidization to control the continuous release of the organic substances in the algae cells, and the nascent trivalent iron generated by the oxidization of ferrite and ferric salt are used as a coagulant; and the coagulation of the pre-oxidized algae cells is reinforced. The method disclosed by the invention is mainly applied to purification for drinking water factories, and is also applied to treatment of the landscape water with the target of recycling the landscape water body, pre-treatment of the eutrophicated water body and inhibition of growth of algae cells.

The invention provides a method for treating an eutrophication water body by utilizing an artificial marsh and a facility thereof. The method comprises the following steps that: an eutrophication water body to be treated is sent to an upflow type coarse filtering bed by a pumping and collecting pipeline; the upflow type coarse filtering bed carries out removing treatment to suspended substances and algae substances in the eutrophication water body; the water body treated by the upflow type coarse filtering bed is evenly distributed to a vertical flow ecological filtering bed by a water feeding and distributing system and subject to secondary biochemical treatment by the vertical flow ecological filtering bed; effluent water is recycled and reused; deposited sludge in the upflow type coarse filtering bed is discharged to a sludge drying filtering bed for stabilization treatment; and a wet sludge filtrate reflows to the upflow type coarse filtering bed for aftertreatment. The proposal of the invention adopts a method of combining the upflow type coarse filtering bed, the vertical flow ecological filtering bed and the sludge drying filtering bed to treat the eutrophication water body, can not only effectively remove the suspended substances and the algae substances but also solve the problem of treating blue algae sludge with low cost, has the characteristics of good algae removing effect and large water treatment amount and is widely suitable for the long-term water purification of the eutrophication water body.

The invention is applicable to the fields of algae-containing drinking water, sewage and landscape water treatment, and in particular, relates to a green pollution-free pre-oxidation coagulation-enhancing high-efficiency algae-removal method. Aiming at current situations of eutrophic water source algae pollution, landscape water algal bloom outburst and sewage treatment plant algae standard exceeding, provided is the high-efficiency algae-removal method comprising the steps of jointly acting on algae-containing water with an ultraviolet technology and hydrogen peroxide, pre-oxidizing and then adding ferrous salt, aluminum salt and the like for enhancing coagulation. Ultraviolet light and hydrogen peroxide reduce the activity of algal cells and increase the specific gravity of the algal cells to make the algal cells easy to settle, and excessive hydrogen peroxide in the pre-oxidation stage is used for oxidation of the later-added ferrous salt; trivalent iron in a newly generated state is continuously produced in the coagulation stage, so that the strong flocculation effect is exerted. Iron water complexes, aluminum salt, divalent iron and trivalent iron salt hydrolysate and the like existing in the system accelerate the formation and growth of flocs and strengthen the coagulation process. The method is mainly applied to drinking water source water and water treatment plant and urban landscape water with algae pollution problems.

The present invention relates to a preparation method of the high-efficient algae flocculating thing, which is easy to be stored and transported, in particular to a preparation method for the high- efficient algae flocculating powder, which uses a kind of innoxious, easy for biological separating and low-cost natural macromolecule polymer clay and also uses some modern separating technology including drying and freezing. The algae flocculating powder produced by the method can be used for fathering seawater tide, freshwater sublimation as well as for wiping off the deleterious algae in the riverway and the waterworks. The present invention is characterized in high-efficiency, low-cost and easy to be stored and transported. The present invention belongs to the water treatment technology region.

The invention provides a preparation method of a copper complex algaecide and belongs to the environment protection field. Divalent copper ion compounds, organic complexes and active agents are added into water, the proportion is 2 to 4:0.5 to 1.5:0.5 to 1.5 according to mole equivalent ratio, the prepared solution is heated to reflux state so as to form homogeneous solution, at last water is added, and copper atoms in the solution is regulated to 3 percent to 15 percent to prepare the copper complex algaecide. The preparation method of the copper complex algaecide of the invention has the advantages of good algae removal effect, low amount and simple use and is provided with potential of large scale popularization.

The invention discloses a magnetic chitosan attapulgite algae removal flocculant. The flocculant comprises a core body and a coating, wherein the core body comprises magnetic chitosan microspheres andattapulgite with a mass ratio of 1:10, and the coating is dimethyl diallyl ammonium chloride clay. The invention also discloses a preparation method of the magnetic chitosan attapulgite algae removalflocculant. The preparation method comprises the following steps: S1) preparing magnetic chitosan microspheres; S2) preparing flocculant pills; and S3) carrying out coating. The magnetic chitosan attapulgite algae removal flocculant disclosed by the invention has a fast effect and a long maintenance time, so that rapid sedimentation and algae removal can be realized, algae can be effectively controlled for a long time, and thus the application prospect is wide. The magnetic chitosan attapulgite algae removal flocculant prepared by the preparation method has uniform particles and has a good algae removal effect.

The invention discloses a mechanical algae removing device for floating algae in water channels. The device comprises a totally rectangular frame; a plane of the frame faces a water flowing direction;the frame is aslant arranged in a manner of left-low and right-high; the top of the frame is fixedly connected with a mounting frame after being bent to the right side; a motor speed reducer is arranged on the right side of the mounting frame; a power output end of the motor speed reducer is in transmission connection with a transmission chain wheel through a driving chain; the driving chain wheel, a first driven chain wheel, a second driven chain wheel and a third driven chain wheel are in transmission connection through at least two traction chains; an algae intercepting mesh is arranged between two adjacent traction chains; spraying systems towards water tanks are respectively arranged in the traction chains on the mounting frame; and the parts, below the motor speed reducer, of the algae intercepting meshes are positioned between the spraying systems and the water tanks. The device has the characteristics of light structure, high rigidity, good stability, convenience for installation and disassembly, high cost performance, excellent algae removing effect and incapability of causing secondary pollution to water sources.

The invention provides unpowered chemical addition and mixed type deep well pressurization reinforcement algae control water treatment equipment, which comprises a main body device and further comprises a chemical adding and mixing mechanism and a high-pressure flushing mechanism, wherein the tail end of a chemical solution conveyer pipe of the chemical adding and mixing mechanism is inserted into a chemical storage tank and arranged on the same horizontal plane of the end of a constant pressure stabilization pipe, the chemical solution conveyer pipe is adjacent to the constant pressure stabilization pipe and connected with the constant pressure stabilization pipe in a non-adjacent mode, the head end of the chemical solution conveyer pipe extends out of the bottom of the chemical storage tank, and the other end of the chemical solution conveyer pipe penetrates through the sealed top end of an inner well of the main body device and extends to the position close to a water inlet pipe and at the upper portion in the inner well; a static mixer is arranged in the inner well under the head end of the chemical solution conveyer pipe. According to the chemical addition and mixed type deep well pressurization reinforcement algae control water treatment equipment, varieties of functions of automatic and quantitative chemical addition, high-efficiency static mixing and deep well pressurization are organically combined instead of mechanical function superposition, and the combination of an automatic quantitative chemical addition technique, a static mixing technique and a deep well pressurization technique is well achieved in large-capacity wide-water-surface water bodies.

The invention discloses a high-efficiency coagulation algae removal method for algae-containing raw water, which is carried out according to the following steps: (1) preparing chitosan and polyaluminum chloride reserve solutions: 50 mg of chitosan is dissolved in 5 mL of 0.1 mol / L hydrochloric acid solution, stirring is carried out until chitosan is completely dissolved, and dilution is carried out with deionized water to obtain a 0.05 g / L chitosan reserve solution, and polyaluminum chloride is diluted with deionized water to obtain a 0.25 g / L polyaluminum chloride reserve solution; (2) completely mixing the chitosan reserve solution and the polyaluminum chloride reserve solution according to the required dosage; and (3) carrying out coagulation according to the following method: 1) 200r / min quick agitation is carried out for 10s to mix the algae-containing raw water uniformly; 2) 200 r / min quick agitation is carried out for 1 min after a coagulant is added; 3) 60 r / min medium-speed agitation is carried out for 10 min; 4) 30 r / min slow agitation is carried out for 15 min; and 5) the agitated solution is allowed to stand for 30 min. The method can realize high-efficiency and safe coagulation algae removal by combining chitosan and polyaluminum chloride for use , the algae removal effect is good, the effect is quick, the operation is simple and the application value is high.

The invention relates to a filter and algae removal method by micro flocculation-terylene high elater fiber balls and equipment thereof. The method comprises: (1) the water to be treated and the flocculant which is added by a wriggle pump are mixed in an inflow pipeline in front of a fiber ball filter column, the water after mixing enters the fiber ball filter column, the filler of the filter column is terylene high elater fiber ball filter material, and the fiber ball filter column carries out reverse washing of low intensity at the end of the filter period; the equipment comprises an original water tank, a water storage tank and a drug adding groove, the original water tank is communicated with a pipeline mixer through a valve flow meter by a lift pump; the drug adding groove is communicated with the pipeline mixer by the wriggle pump, and a stirrer is installed in the drug adding groove; the apopore of the pipeline mixer sends the water to the water storage tank by the fiber ball filter column, and the terylene high elater fiber ball filter material is installed at the middle part of the filter ball filter column. By the terylene high elater fiber ball filter material with the characters of high porosity, large specific surface area, fast filter speed and strong pollutant stopping ability and long filter period, the effect on removing algae and turbidity substances in water is very obvious.

The invention relates to a method for preparing flocculant from water treatment plant sludge and application of the prepared flocculant to algae removal in water. The water treatment plant sludge with coalbed water or surface water as a water source serves as the raw material in the method for preparing the flocculant. Three parts of sludge which is dried and smashed are weighed and mixed with concentrated hydrochloric acid according to the volume ratio of 1:(0.67-2), the mixture is placed in a sealed container for modification reaction, and modified sludge is obtained; 60 parts of ultra-pure water or distilled water or cooled boiled tap water are added into the sealed container by volume to be evenly mixed with the modified sludge, then sludge residues are filtered out, and filter liquid is collected for use; the collected filter liquid is determined to 100 parts by weight by means of ultra-pure water or distilled water or cooled boiled tap water, and the flocculant finished product is prepared. The flocculant obtained through the method is used for algae removal in water, is small in consumption, quick in speed, thorough in algae removal and convenient to operate and provides a new means for resource utilization of water treatment plant sludge.

The invention relates to the technical field of red tide prevention and control measures, and in particular relates to a device for controlling red tides by utilizing modified clay and a method thereof. The device comprises a power system, a spiral conveying storage bin, a mixed flow system, a high-pressure sprinkling system and a central control system, wherein the power system is used for providing power needed for the operation of the whole device; the spiral conveying storage bin is used for storing materials and conveying materials to the mixed flow system; the mixed flow system continuously absorbs water in a red tide occurring water area to serve as a dispersing agent of the modified clay, so that the water flow forms tunable turbulence during advancing, and rapid mixing and curing of the modified clay material and water can be realized; the high-pressure sprinkling system is used for pressurizing the cured modified clay turbid liquid and sprinkling the surface of the red tide water body according to a program setting manner; and the central control system is used for performing central control on the whole complete unit. According to the device disclosed by the invention, continuous and mechanized operations of storing, mixing and sprinkling the modified clay can be realized, and the engineering operation needs of red tide disaster prevention and control work are met.

The invention discloses a blue-green algae growing and inhibiting device with solar cooling and shading functions and a use method of the blue-green algae growing and inhibiting device. The device isarranged on a floating body framework, wherein a solar panel is fixedly arranged on the floating body framework; a semiconductor chilling plate is arranged at a position, close to the water surface, of the lower part of the solar panel; a cooling rod is arranged below the semiconductor chilling plate and transfers cooling capacity generated by the semiconductor chilling plate into water for reducing the temperature of a water body; the solar panel is simultaneously constructed into a light shading plate. The blue-green algae growing and inhibiting device disclosed by the invention takes solarenergy as a power supply and combines the semiconductor chilling plate, the cooling rod and shading of the solar panel for application. The blue-green algae growing and inhibiting device is based on the characteristics of algae outbreak at illumination when the temperature is increased and takes solar energy as power; the semiconductor chilling plate is adopted to reduce the temperature of the water body, realizes the effects of reducing the temperature of the water body and the illumination, and destroys environmental conditions of the algae outbreak, thereby achieving the effect of inhibiting the algae outbreak. The blue-green algae growing and inhibiting device disclosed by the invention overcomes the defects of traditional technologies and can obviously inhibit algae growth.

The invention discloses a preparation method of an ecological and environment-friendly composite biological algaecide and belongs to the field of algaecide preparation. Active liquor is obtained from tender catchweed bedstraw herb and radix scutellariae through microwave extraction, concentrated liquor is obtained after concentration, sodium alginate is added into the concentrated liquor, a chitosan solution is added after dissolution, viscous liquor is obtained after uniform stirring, EM bacterial powder is firstly activated with brown sugar water, a fermentation culture medium is inoculated with activated bacterial liquor, fermentation liquor is obtained through fermentation culture, dried wormcast and the fermentation liquor are mixed, the mixture is still standing and then mixed with the standby viscous liquor, the materials are mixed, then the mixture is filtered, and filter residues, namely the biological algaecide are obtained. The prepared biological algaecide is free of toxins, good in dispersity, good in algae removal effect and long in algae inhibition acting time.

The invention discloses a magnetic high-efficiency algaecide and a preparation method and application thereof. The preparation method comprises mixing of nano-ferroferric oxide and allelochemicals, wherein the allelochemicals comprise p-hydroxybenzoic acid and / or coumarin. The problems that when nano-materials are used to remove algae, algae cells may desorb under the conditions of wind power andwater conservancy to cause large re-emerge of the algae because the nano-materials are often reversible in adsorption can be solved.

The invention discloses algicide based on aquatic plants and a preparation method and application of the algicide. The algicide comprises HCl, plant powder, expanded vermiculite and water, wherein the plant powder is selected from one or more of najas marina, salvinia natans, cattail, alternanthera philoxeroides and xanthium sibiricum. The algicide has excellent algae removal capacity, and is environmentally friendly and low in using amount. Meanwhile, the method for preparing the algicide is simple in step, raw materials are easy to obtain, cost is low, and therefore the algicide can be widely applied to purifying water.

The invention discloses an ultrasonic blue-green algae control device and method based on solar energy and wave energy synergistic power generation. The device comprises an ultrasonic transducer arraymodule, a wind energy piezoelectric power generation module, a solar power generation module, an energy conversion and control system module and a buoyancy tank; the ultrasonic transducer array module comprises a plurality of ultrasonic transducers which are arranged on a first annular frame in a uniform array manner; the wind energy piezoelectric power generation module comprises a plurality ofrotary piezoelectric vibrator blades, a plurality of fixed piezoelectric vibrators, a second annular frame, a third annular frame, mounting beams, first supporting beams, second supporting beams, a second fixed cylinder and a third fixed cylinder. All-weather power supply of the whole device is realized by collecting wind energy and solar energy, and ultrasonic algae removal is performed on the basis of the phased array principle. The device is based on green energy, and has the advantages of green algae removing, no pollution, large algae removing area, excellent effect and the like.

The invention discloses a method for extracting algaecide out of moringa oleifera oil residue and removing algae in water by using the algaecide, belonging to the algae-removing in water technology field. The method comprises the following steps of: crushing the moringa oleifera oil residue after the oil is extracted into moringa oleifera oil residue powder; mixing and stirring the moringa oleifera oil residue powder with an ammonium sulfate solution; filtering the mixed solution; adding ammonium sulfate powder into the filtered liquid; carrying out centrifugal treatment on the mixed solution; eluting white precipitate by using distilled water; dialyzing the eluant; taking the emulsion in a dialysis bag as the final algaecide; taking a certain amount of the algaecide and adding into water containing algae to be treated; and stirring and precipitating so as to remove the algae in the water. According to the method, the oil residue after the oil is extracted from moringa oleifera is taken as the raw material, so that a novel way is developed for resource utilization of the moringa oleifera oil residue; and meanwhile the method has the advantages of simpleness and convenience in algaecide extraction process, simpleness and convenience in equipment, simpleness and convenience in operation and the like, the extracted algaecide has a good algaecide effect, and a novel method is provided for water body eutrophication treatment and removal of algae in water sources.

The invention discloses a wind energy suspension type ultrasonic ecological algae removal device, comprising a frame, two sides of the frame are respectively fixed with floating boxes, and a front equipment box, a wind energy drive device and a rear equipment box are arranged on the top of the frame in order from front to back. The front equipment box and the rear equipment box are fixedly installed with the frame. The wind energy drive device includes a mast. The mast is installed in cooperation with the mounting seat on the surface of the frame through a bearing pair. Both ends of the rod are fitted with a fixed ring, the fixed ring is connected to the mast through an electric telescopic rod, the fixed ring is connected to the installation ring at the top of the mast through a triangular sail, and the bottom end of the frame is evenly installed with ultrasonic probes. The ecological algae removal device adopts green energy, physical algae removal, good algae removal effect and large algae removal area.

The invention discloses algicide based on sweet wormwood herb extract modification and a preparation method and application thereof. The preparation method comprises the steps that 1, sweet wormwood herb powder is soaked in water, then filtering is carried out, and filtrate is extracted for evaporative crystallization to obtain sweet wormwood herb extract; 2, the sweet wormwood herb extract is dissolved into water to obtain a sweet wormwood herb extract solution; 3, the sweet wormwood herb extract solution and fumed silica are mixed to obtain the algicide based on sweet wormwood herb extract modification. The algicide prepared through the method is excellent in alga removal effect and environmentally friendly, and meanwhile the preparation method of the algicide is simple in step and low in cost.

The invention discloses a multifunctional composite algae-removal particle. The particle is prepared from the following components in weight percentage: 0.08-3% of algaecide, 0.1-2% of sodium percarbonate crystal, 2-6% lithium magnesium silicate, 2-3% of potassium silicate, 20-30% of aqueous polyurethane coating, 10-30% of water-swellable composition, 0.1-0.3% of composite foaming agent, 0.2-0.5% of anredera extract, 0.1-0.2% of virgatus extract, 2-5% of microporous ceramic powder and water-soluble polymers as the balance. The preparation method of the particle comprises the steps of crushing sodium percarbonate crystals, lithium magnesium silicate and potassium silicate, mixing up obtained powders with the algaecide, adopting obtained materials as a core body, coating the core body with the aqueous polyurethane coating, coating again with the water-swellable composition, and coating for a third time with the water-soluble polymers to obtain the algae-removal particle. The prepared algae-removal particle is novel in form, and the targeted delivery of the prepared algae-removal particle is enabled. Meanwhile, the prepared algae-removal particle is large in local application concentration and can thoroughly remove algae. The water pollution can be reduced by the algae-removal particle.

The invention belongs to the technical field of drinking water treatment, and particularly relates to a preoxidation-coagulation alga removing method based on in-situ generation of double coagulants. Aiming at the eutrophication pollution of lake, reservoir and other surface water sources, the invention provides a method of sequentially feeding an oxidant, a ferrite, an aluminum salt and the like, wherein a preoxidant is used for inactivating algae cells, the ferrite is used for terminating preoxidation to control the continuous release of organic matters in the algae cells, and at the same time, the ferrite is oxidized to generate new-state ferric iron and aluminum salt to be used as double coagulants; and the coagulation of the preoxidized algae cells is enhanced. The method is mainly applied to purification in drinking water plants, and can also be applied to landscape water treatment with landscape water reclamation as the aim, and water source pretreatment of eutrophicated water to inhibit the growth of the algae cells.

The invention discloses a capped algae removal device of an effluent weir for sewage treatment. The capped algae removal device comprises a box door, a main algae removal machine, protection covers and four moving wheels, wherein the box door is inlaid into the front surface of the main algae removal machine, and the protection covers are arranged on the two sides of the main algae removal machine; the four moving wheels are fixedly arranged at the four corners of the bottom of the main algae removal machine. A fixed block moves, and by the fixing action of a fixed plate, a linking block drives a rotating rod to move at the moment, so that a broom moves for sweeping. Thus, the algae removal effect is good, and algae in cracks can be effectively removed. A biological algaecide in the innerpart of an algaecide storage box is sprayed out from a sprinkler head through a connection hose to assist the broom in removing the algae, so that the algae difficult to remove is effectively removed.A driving gear is driven to rotate under the linkage action of a driving belt, and at the moment a toothed plate engaged with the driving gear starts to move up and down so as to drive the sprinklerhead to move and spray up and down, so that the algae is sprayed to be removed comprehensively.

The invention discloses a preparation method and application of a high-efficiency flocculation algae-removal material with environmental adaptation characteristics, belonging to the technical field of algae-removal materials. The method comprises the following steps: according to the chitosan / nano meerschaum mass ratio by Box-Behnken response surface optimization design, adding a nano meerschaum suspension into a chitosan acid solution, and stirring to obtain a mixed solution; and obtaining a chitosan modified clay / cationic polyacrylamide mixed solution according to the chitosan / nano meerschaum / cationic polyacrylamide ratio by Box-Behnken response surface optimization design. According to the method, the clay mineral surface is modified by the acid, so that the modified flocculation material has ionic properties, thereby finally enhancing the flocculation algae-removal efficiency. The cationic polyacrylamide / chitosan modifier / nano meerschaum ratio by Box-Behnken response surface optimization design is selected according to the temperature, pH and algae concentration conditions of different water bodies, so the flocculation algae-removal material has favorable algae removal effects.

The invention discloses high-performance polymeric aluminium. The high-performance polymeric aluminium is prepared from the following main raw materials in parts by weight: 40-50 parts of modified polymeric aluminium, 15-20 parts of sodium chlorate, 10-16 parts of industrial salt, 6-9 parts of zinc chloride, 20-30 parts of 36% industrial hydrochloric acid, 10-15 parts of sodium silicate, 80-100 parts of ammonia-free distilled water and 18-25 parts of a NaHCO3 solution; and the invention further discloses a preparation method of the high-performance polymeric aluminium. According to the invention, the modified polymeric aluminium is used as a main body, and is copolymerized with the zinc chloride and polysilicic acid in a preparation process, so that a polymer combining aluminium salt, magnesium salt and zinc salt is obtained; and the sodium chlorate and the industrial salt are added, so that the high-performance polymeric aluminium is obtained; when the high-performance polymeric aluminium is used in a wastewater treatment process, the sedimentation speed of wastes is faster; the algae removal effect is good; flocs are large and dense; the sedimentation speed is fast; the adding amount is low; the cost can be effectively reduced; and therefore, the high-performance polymeric aluminium has a great significance for guaranteeing the water supply quality quality and lowering waterproduction cost.

The invention discloses a device used for removing blue alga on a filter screen, in particular a device which removes dense alga on the filter screen of an alga water separating machine and leads the filter screen to be dredged. The device is characterized in that the device comprises a brush roller and a motor, wherein, the brush roller comprises a mainshaft; the excircle of the mainshaft is provided with elastic brush sheets which are bar-shaped hard plastic sheets and are uniformly and compactly distributed. Two ends of the mainshaft are rotatablely arranged on a bracket by a bearing; the motor is also arranged on the bracket; the mainshaft is parallel to the output shaft of the motor. One end of the mainshaft and the output shaft of the motor are respectively provided with a pulley; two pulleys are connected with each other by a transmission belt. By adopting the device, the dense alga bonded to the filter screen can be removed and the removal effect is good.

The invention relates to a full-automatic algae removal ship capable of detecting the quantity of algae and an algae removal method, and belongs to the technical field of water body impurity removal.The bottom end of the bow of the algae removal ship is provided with an algae sensor; a pipeline between an algae liquid collecting device and a sedimentation filtering device and an electric brake onthe pipeline communicate with each other, and the sedimentation filtering device and the electrocatalytic oxidation device communicate with each other through the pipeline and the electric brake on the pipeline; an outer discharge port is arranged on the electrocatalytic oxidation device; the algae sensor is connected with a signal receiving end of an electric intelligent device; the control endof the electric intelligent device respectively communicates with the algae liquid collecting device, the electric steering engine, the sedimentation filtering device and the electric brake; and the electric intelligent device supplies power for the algae liquid collecting device, the sedimentation filtering device, the electrocatalytic oxidation device and the control module. According to the full-automatic algae removal ship capable of detecting the quantity of algae and the algae removal method, the device is subjected to double treatment of sedimentation filtration and electrocatalytic oxidation, the treatment efficiency is high, the speed is high, and particularly in the blue algae outbreak stage, greater harm can be prevented.

The invention discloses a composite photocatalyst film for algae removal and a preparation method of the composite photocatalyst film, and particularly, a base film with a porous structure is preparedby compounding poly-L-lactic acid, graphene oxide, nano-silver and multi-walled carbon nanotubes, and transition metal sulfide and single-walled carbon nanotubes are sprayed on the two sides of the base film respectively to form the composite photocatalyst film with a three-layer structure. The composite photocatalyst film prepared by the method is high in catalytic activity, does not generate secondary pollution in a water body, and also shows relatively good algae removal performance in a cyanobacteria water body treatment process.

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.