Device and method for providing Nitzschia algae carrying algae-lysing bacteria

Abstract

The present application relates to a device and method for providing Nitzschia algae carrying algae-lytic bacteria. The device comprises a frame comprising upper and lower transverse supports, and longitudinal supports supporting the upper and lower transverse supports; a blue light irradiation module disposed near the bottom of the frame for irradiating blue light onto Nitzschia algae on the bottom of a water body; a plurality of rollers rotatably supported on the ends of the upper and lower transverse supports; a Nitzschia algae carrier, tensioned and mounted on the rollers, capable of attaching the Nitzschia algae from the bottom and carrying the Nitzschia algae in a cyclical movement as the rollers rotate; and an algae-containing box, disposed along the path of the Nitzschia algae carrier and housing algae-lytic bacteria, such that the Nitzschia algae carried by the Nitzschia algae carrier passing through the box come into contact with the algae-lytic bacteria.

Description

Technical Field

[0001] The present application relates to the field of microbial applications in water bloom management, and in particular to a device and method for providing Nitzschia algae carrying algae-lytic bacteria. Background Art

[0002] In recent years, the incidence of algal blooms in eutrophic waters due to lake pollution has increased. Abnormal algal blooms not only damage the ecology and landscape, but also cause problems such as sour and odorous tap water. In particular, cyanobacteria (Microcystis), particularly Microcystis spp., which are the dominant species in algal blooms, produce toxic microcystins, posing a health risk to humans and livestock.

[0003] Therefore, for many years, people have been committed to developing various methods for controlling algal blooms. Currently, known measures for controlling algal blooms directly implemented on site include chemical methods such as algaecide spraying, physical methods such as filtration, flocculation, sedimentation, separation and recovery, and biological methods such as ecosystem control (biomanipulation, aquatic plant cultivation, etc.). In addition, there are methods such as bottom sediment dredging, sand covering, and bottom oxygen introduction to inhibit the supply of nutrients from the on-site bottom sediment to promote the proliferation of cyanobacteria. In addition, there are methods such as covering the water surface with a blackout curtain or using aeration and propellers to vertically mix the water to send the cyanobacteria to the dark bottom layer to inactivate photosynthesis and simultaneously lower the surface water temperature and pH to inhibit the proliferation of cyanobacteria.

[0004] However, previous treatment measures have presented numerous challenges. These include the need for large-scale engineering and significant costs, the potential for secondary pollution of surrounding waters, and negative impacts on local biota beyond the cyanobacteria. Furthermore, these approaches are limited to the small water bodies where the measures were taken, failing to achieve broader impacts.

[0005] To minimize the impact on the surrounding water quality and biological environment during algal bloom control, the use of algaecidal bacteria and viruses specifically targeted to algal blooms has been investigated. However, this approach poses the problem of introducing non-native microorganisms. Furthermore, algaecidal bacteria and viruses target a wide range of algae, potentially killing other native algae at the same time. Summary of the Invention

[0006] Therefore, in order to solve at least part of the above problems, the present application proposes a device and method for providing Nitzschia algae carrying algae-lytic bacteria, so as to utilize the existing Nitzschia algae carrying algae-lytic bacteria that have specific effects on cyanobacteria to achieve the purpose of specifically acting on cyanobacteria.

[0007] According to one aspect of the present invention, a device for providing Nitzschia algae carrying algae-lytic bacteria is provided, comprising: a frame comprising an upper transverse support, a lower transverse support, and a longitudinal support supporting the upper transverse support and the lower transverse support; a blue light irradiation module, disposed near the bottom of the frame, for irradiating blue light onto the Nitzschia algae at the bottom of a water body; a plurality of rollers, rotatably supported on respective ends of the upper transverse support and the lower transverse support; a Nitzschia algae carrier, tensioned and mounted on the plurality of rollers, attaching the Nitzschia algae from the bottom and carrying the Nitzschia algae to circulate as the plurality of rollers rotate; and an algae-containing box, disposed on a moving path of the Nitzschia algae carrier and containing algae-lytic bacteria therein, so that the Nitzschia algae carried by the Nitzschia algae carrier passing through the interior thereof comes into contact with the algae-lytic bacteria.

[0008] According to another aspect of the present invention, a method for providing Nitzschia carrying algae-lytic bacteria is provided, comprising: placing the aforementioned device for providing Nitzschia carrying algae-lytic bacteria into the water bottom; irradiating the bottom of the water body with blue light via a blue light irradiation module to activate the Nitzschia on the bottom; and driving a plurality of rollers to rotate to drive a Nitzschia carrier to circulate, so that: the Nitzschia carrier contacts the bottom to attach the activated Nitzschia, and carries the Nitzschia through an algae-lytic bacteria container containing algae-lytic bacteria to generate Nitzschia carrying algae-lytic bacteria, and then transporting the Nitzschia carrying algae to the surface of the water body to contact the cyanobacteria in the surface layer.

[0009] Technical Effects

[0010] According to the present application, by irradiating the bottom of the water body with blue light, the Nitzschia algae in the bottom sediment are dominantly activated, and the activated Nitzschia algae are carried and transported by the Nitzschia algae carrier, so that they come into contact with algae-lytic bacteria to form Nitzschia algae carrying algae-lytic bacteria, and the Nitzschia algae carrying algae-lytic bacteria are transported to the surface of the water body, and finally the cyanobacteria are infected with the Nitzschia algae carrying algae-lytic bacteria, thereby decomposing, lysing and inhibiting the cyanobacteria.

[0011] By using existing Nitzschia algae that have specific effects on cyanobacteria to carry algae-lytic bacteria to specifically act on cyanobacteria, the introduction of non-native species can be avoided, while also reducing the impact on other local algae. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 3 is a schematic diagram showing the structure of a device for providing Nitzschia algae carrying algae-lysing bacteria according to an embodiment of the present application.

[0013] Figure 2 1 is a schematic diagram showing the structure of the device for providing the above-mentioned Nitzschia algae carrying algae-lysing bacteria, as viewed from the left side.

[0014] Figure 3A2 is a schematic diagram showing that a device for providing Nitzschia algae carrying algae-lysing bacteria according to an embodiment of the present application is deformed according to the water level.

[0015] Figure 3B 2 is a schematic diagram showing that a device for providing Nitzschia algae carrying algae-lysing bacteria according to an embodiment of the present application is deformed according to the water level.

[0016] Figure 4 3 is a schematic diagram showing a control structure for controlling the deformation of the supply device of the Nitzschia algae carrying algae-dissolving bacteria according to the water level. DETAILED DESCRIPTION

[0017] In order to further clarify the invention purpose, technical solution and beneficial technical effects of the present invention, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings. It should be understood that the embodiments described in this specification are only for the purpose of illustrating the present invention, and are not intended to limit the present invention.

[0018] In the face of the technical problems existing in the prior art, the inventors of this application have conducted long-term and intensive research on the microbial control of water blooms and discovered that Nitzschia has a specific effect on cyanobacteria in water blooms.

[0019] To confirm this discovery, the inventors conducted cultivation experiments to investigate the attachment characteristics of Nitzschia to cyanobacteria. Three cultivation systems were designed: 1. a system with cyanobacteria alone; 2. a system with both cyanobacteria and Nitzschia coexisting in the same container; and 3. a system in which a bamboo pole with a diameter of 2 mm was placed close to the surface of the culture solution to allow the Nitzschia to migrate to the surface and come into contact with the cyanobacteria. Each of these three cultivation systems, containing 100 ml of culture solution, was statically cultured for 14 days under conditions of 2000 lux of white fluorescent light, a 12-hour light / 12-hour dark photoperiod, and a temperature of 25°C. The experimental results are shown in Table 1 below.

[0020] Table 1: Results of contact culture experiments with cyanobacteria and nitzschia (number of suspended algae cells, cells / mL)

[0021]

[0022]

[0023] The experiments revealed that cyanobacteria in System 1 proliferated, while cyanobacteria decreased in other systems coexisting with Nitzschia. In particular, in System 3, where cyanobacteria and Nitzschia coexisted, Nitzschia adhered to the surface of cyanobacterial colonies or invaded and proliferated. Many colonies were observed to settle, and the number of suspended cyanobacteria was reduced to one-tenth compared to when cyanobacteria were cultured alone. This demonstrates that Nitzschia has the characteristic of specifically attaching to cyanobacterial colonies.

[0024] However, in nature, cyanobacteria are suspended in the surface layer of water bodies, while Nitzschia algae are mainly distributed in the bottom sediment and on the surface of the sediment and have attachment mobility, and the two are almost not in contact. Nitzschia algae on or in the sediment at the bottom of the water body are in a dormant state and do not proliferate due to the lack of light or insufficient light. There are abundant nutrients in the bottom of the water body, which has other reproduction conditions besides light. Therefore, for the dormant Nitzschia algae in the bottom layer, light can be used to activate and proliferate them. Regarding light proliferation, the inventors of the present application have found that irradiation with blue light has the effect of preferentially promoting the proliferation of Nitzschia algae. In order to confirm this conclusion, the inventors of the present application conducted the following culture control experiment. 2g of eutrophic lake sediment was placed in 100mL of culture medium, and the culture medium was irradiated with white LED and blue LED at a temperature of 25°C with a photon amount of about 100μmol·m -2 ·s -1 The cells were cultured for 7 days under the conditions of irradiation with a photoperiod of 12 h light / 12 h dark, and the experimental results described in the following Table 2 were obtained.

[0025] Table 2: Results of culture experiment on the promotion effect of blue light irradiation on the proliferation of Nitzschia (cells / mL)

[0026]

[0027] The results showed that all algae species proliferated under white light, while green algae and blue algae barely proliferated under blue light, while Nitzschia algae proliferated approximately 100-fold. This confirms that blue light preferentially promotes the growth of Nitzschia algae.

[0028] Based on the above findings, the inventors of the present application further proposed a solution for specifically treating cyanobacteria by utilizing Nitzschia algae in the bottom sediment of the water body to be treated.

[0029] The following combination Figures 1 to 4 , the device and method for providing Nitzschia algae carrying algae-lytic bacteria according to the specific implementation scheme of the present application are described. Figure 1 2 is a schematic diagram showing the structure of a device for providing Nitzschia algae carrying algae-lysing bacteria according to an embodiment of the present application. Figure 2 1 is a schematic diagram showing the structure of the device for providing the above-mentioned Nitzschia algae carrying algae-lysing bacteria, as viewed from the left side. Figure 3A and Figure 3B is a schematic diagram showing that the device for providing Nitzschia algae carrying algae-lysing bacteria according to an embodiment of the present application is deformed according to the water level. Figure 4 3 is a schematic diagram showing a control structure for controlling the deformation of the supply device of the Nitzschia algae carrying algae-dissolving bacteria according to the water level.

[0030] like Figure 1 and Figure 2As shown, the providing device 10 for the algae carrying algae-lysing bacteria comprises a frame, which comprises an upper transverse support 11, a lower transverse support 12 and a longitudinal support 13 supporting the upper transverse support 11 and the lower transverse support 12. Figure 1 The upper and lower transverse supports 11, 12 and longitudinal supports 13 are provided on the front and back sides of the paper respectively to support the device more stably and firmly. Rotatable rollers 14 are supported between the ends of the two upper transverse supports 11 and between the ends of the two lower transverse supports 12. For example, Figure 1 Four rollers 14 are assembled at the four corners.

[0031] A Nitzschia carrier 15 is tensioned on these rollers 14, used to attach Nitzschia from the water's bottom and carry the Nitzschia in a circular motion as the rollers 14 rotate. Specifically, Nitzschia carrier 15 comprises a belt-shaped carrier 151, tensioned on the rollers 14 and circulated as the rollers 14 rotate; and a Nitzschia attracting carrier 152, mounted on the surface of belt-shaped carrier 151 and capable of attracting the Nitzschia through contact with the bottom of the water. Nitzschia is an adhesive diatom with microscopic fibers on its outer cells. It can attach to and move on any surface, including chemical and natural fibers, glass, soil, stone, and aquatic plants. Belt-shaped carrier 151 can be made of any material, as long as it is not slippery and resists detachment. For example, it can be made of a resin film, preferably a light-transmitting resin film to minimize light blocking, and more preferably a resin film that transmits blue light. A plurality of Nitzschia inducing carriers 152 are arranged on the surface of the belt-shaped carrier 151. One end of each carrier is fixed to the surface of the belt-shaped carrier 151, while the other end is free, allowing it to dangle downward under its own weight. The Nitzschia inducing carriers 152 are preferably fibrous, allowing the Nitzschia to migrate between the fibers. Similar to the belt-shaped carrier 151, the Nitzschia inducing carriers 152 can be made of any material, as long as the Nitzschia does not easily fall off once attached and is not slippery. They can be made of the same material as the belt-shaped carrier 151 or a different material.

[0032] like Figure 2 As shown, the Nitzschia algae carrier 15 can be provided alone or in multiple arrangements side by side.

[0033] The device 10 for providing Nitzschia algae carrying algae-lytic bacteria further includes an algae-lytic bacteria container 16 for containing algae-lytic bacteria 2. The algae-lytic bacteria container 16 is disposed on a circulation path of the Nitzschia algae carrier 15. The Nitzschia algae carrier 15 circulates through the algae-lytic bacteria container 16, so that the algae-lytic bacteria 2 in the container come into contact with the Nitzschia algae carrier 15 and adhere to the Nitzschia algae 1 carried by the Nitzschia algae carrier 15, thereby forming Nitzschia algae carrying algae-lytic bacteria.

[0034] The device 10 for providing Nitzschia algae carrying algae-lytic bacteria may further include an algae-lytic bacteria supply tank 17, which stores the algae-lytic bacteria 2 and supplies the algae-lytic bacteria 2 to the algae-lytic bacteria container 16 via a hose or the like. The algae-lytic bacteria supply tank 17 may be located above the water surface, utilizing a head difference to supply the algae-lytic bacteria 2 to the algae-lytic bacteria container 16. Alternatively, the algae-lytic bacteria supply tank 17 may be located below the water surface, in which case the algae-lytic bacteria 2 may be supplied via a water pump or the like. The algae-lytic bacteria may be isolated and extracted from the water to be treated and then cultured in large quantities for use, or they may be purchased externally.

[0035] The device 10 for providing Nitzschia algae carrying algae-dissolving bacteria is provided with a blue light irradiation module 18 near the bottom of the frame. The blue light irradiation module 18 irradiates the Nitzschia algae 1 on the bottom sediment of the water body to activate it. The blue light irradiation module 18 can be set above the Nitzschia algae carrier 15, for example. In this case, the Nitzschia algae carrier 15 is preferably formed of a translucent resin film to minimize light blocking. The light source of the blue light irradiation module 18 can be a blue light LED, specifically a blue light LED array mounted on a substrate. In addition, the light source can also be composed of a white LED and a blue filter, specifically a white LED array mounted on a substrate, and a blue filter layer or a blue filter covering the LED array. Blue light irradiation is not limited to this, and any existing blue light irradiation means can be used.

[0036] The device 10 for providing the Nitzschia algae carrying algae-dissolving bacteria may also be provided with wheels 19 at the bottom to support and facilitate movement of the device.

[0037] In addition, in order to make the Nitzschia algae 1 moving from the bottom layer to the surface layer fully contact the cyanobacteria 3 near the water surface, the Nitzschia algae carrier 15 needs to be always located just below the water surface. In order to make the Nitzschia algae carrier 15 carrying the algae carrying algicidal bacteria always located at a predetermined water depth, in this embodiment, as shown in FIG. Figure 1 、 Figure 3A and Figure 3BAs shown, the upper transverse support 11 of the device 10 for providing Nitzschia carrying algae with algae-lytic bacteria is formed as a support that can be extended horizontally, and the longitudinal support 13 is formed as a support that can be extended vertically. In addition, a support arm 20 is uprightly provided at the same height as the highest part of the Nitzschia carrier 15 of the device 10 for providing Nitzschia carrying algae with algae-lytic bacteria. On the support arm 20, an upper water level sensor 21 and a lower water level sensor 22 are arranged vertically up and down at a predetermined distance from the highest part of the Nitzschia carrier 15. In the accompanying drawings, the algae-lytic bacteria supply tank 17 is provided on the support arm 20, and the water level sensors 21 and 22 are provided on the algae-lytic bacteria supply tank 17, but the algae-lytic bacteria supply tank 17 can also be provided at other locations separately from the water level sensors 21 and 22. The upper and lower water level sensors 21 and 22 output electrical signals indicating whether they are in contact with water. As shown Figure 4 As shown, the providing device 10 further includes a control unit 23, which receives the electrical signals output by the upper and lower water level sensors 21 and 22, and controls the extension and contraction of the upper transverse support 11 and the longitudinal support 13 based on the received electrical signals, so that the highest part of the Nitzschia carrier 15 is at a predetermined water depth position. Figure 1 In the process, the portion of the Nitzschia algae carrier 15 between the two upper rollers carrying the Nitzschia algae carrying algae-lysing bacteria is placed at a predetermined water depth.

[0038] In this embodiment, when the electric signal received from the upper water level sensor 21 is an electric signal indicating contact with water, the control unit 23 Figure 3A As shown in FIG. 1 , the upper transverse support 11 and the longitudinal support 13 are controlled to retract and contract, so that the upper transverse support 11 contracts and the longitudinal support 13 extends, until the electrical signal received from the upper water level sensor 21 becomes an electrical signal indicating no contact with water. In addition, when the electrical signal received from the lower water level sensor 22 becomes an electrical signal indicating no contact with water, the control unit 23 Figure 3B As shown, the upper transverse support 11 and the longitudinal support 13 are controlled to extend and retract until the electrical signal received from the lower water level sensor 22 becomes an electrical signal indicating contact with water. In this way, the control unit 23 automatically extends and retracts the upper transverse support 11 and the longitudinal support 13 so that the upper water level sensor 21 is located in the air and the lower water level sensor 22 is located in the water, thereby enabling the portion of the Nitzschia carrier 15 carrying the Nitzschia algae carrying the algae-dissolving bacteria, i.e., Figure 1 、 Figure 3A and Figure 3B The portion of the Nitzschia carrier 15 shown between the upper two rollers 14 is always at a predetermined water depth.

[0039] Here, for example, a conductivity sensor in which current flows when in contact with water can be used as the first and lower water level sensors 22, 22. In this case, when the control unit 23 receives an electrical signal from the conductivity sensor, it determines that the conductivity sensor is in contact with water. When it does not receive an electrical signal from the conductivity sensor, it determines that the conductivity sensor is not in contact with water.

[0040] The highest part of the Nitzschia carrier 15, i.e. Figure 1 The water depth of the portion of the water carrying the Nitzschia algae carrying algae-dissolving bacteria is determined by the support arm 20 that supports the water level sensor. The support arm 20 can be configured as a retractable adjustment arm, which can be adjusted to a predetermined water depth by extending and retracting the highest portion of the Nitzschia algae carrier 15. For example, the predetermined water depth is preferably the water layer where cyanobacteria colonize. For example, the water depth can be set between 2 cm and 10 cm.

[0041] The above describes the structure of the device 10 for providing Nitzschia algae carrying algae-lysing bacteria. Next, the treatment of blue-green algae using the device 10 for providing Nitzschia algae carrying algae-lysing bacteria will be described.

[0042] To treat cyanobacteria 3, a device 10 for providing Nitzschia algae carrying algicidal bacteria, according to an embodiment of the present application, is placed at the bottom of the water body to be treated and powered on. The blue light irradiation module 18 at the bottom of the device then radiates blue light onto the bottom sediment, activating the Nitzschia algae 1 in and on the shallow sediment layer, causing them to multiply. Simultaneously, rollers 14, axially supported on the ends of the upper and lower transverse supports 11 and 12, rotate under the drive of a motor (not shown in the drawings) connected to at least one of these rollers, driving the Nitzschia algae carrier 15 to slowly rotate and move. As the Nitzschia algae carrier 15 moves to the bottom, the Nitzschia algae inducing carrier 152 on its surface comes into contact with the sediment. The activated and multiplying Nitzschia algae 1 on the sediment adhere to the Nitzschia algae inducing carrier 152 and continue to multiply under the irradiation of blue light. Subsequently, as the Nitzschia algae carrier 15 moves toward the surface of the water, the Nitzschia algae 1 is transported toward the surface. As it moves toward the surface of the water, the Nitzschia algae-inducing carrier 152 covers the belt-shaped carrier 151, preventing the Nitzschia algae 1 from escaping. The Nitzschia algae carrier 15 continues its journey toward the surface and passes through an algae-lytic bacteria container 16 positioned near the surface. Algae-lytic bacteria 2, which are supplied from an algae-lytic bacteria supply tank 17 and capable of decomposing algal blooms, come into contact with and attach to the Nitzschia algae 1 on the Nitzschia algae carrier 15, forming algae-carrying Nitzschia algae. The algae-carrying Nitzschia algae are transported to the surface of the water as the Nitzschia algae carrier 15 moves, where they specifically attach to the cyanobacteria cells suspended in the surface layer and then invade the interior of the cyanobacteria, allowing the algae-lytic bacteria 2 to infect and decompose the cyanobacteria. In addition, the cyanobacteria that infect the Nitzschia can be spread over a large area with the flow of surface water, continue to contact and infect healthy cyanobacteria, and then the infection of algae-lytic bacteria 2 is expanded to a wider range, which is beneficial to suppressing the cyanobacteria in the entire water body.

[0043] As described above, according to the present invention, by combining blue light irradiation that preferentially activates and proliferates Nitzschia algae with a Nitzschia carrier that allows the Nitzschia algae to attach and then move to the surface layer where the cyanobacteria are located, it is possible to utilize the locally existing Nitzschia algae to specifically act on the cyanobacteria.

[0044] Furthermore, in the embodiments of the present invention, since LEDs are used for illumination and the Nitzschia carrier is slowly moved, the process can be implemented using a small amount of energy and small equipment. For example, local solar and wind power generation and storage can be utilized, allowing the process to be implemented using only green energy.

[0045] Furthermore, the present invention utilizes only light irradiation, without introducing any external substances or chemicals, thus preventing any impact on the surrounding aquatic environment. Furthermore, the invention utilizes the existing Nitzschia algae in the bottom sediment of the water body being treated, thus preventing the introduction of any foreign species.

[0046] Furthermore, according to the present invention, by making full use of the algae-lysing bacteria attached to and carried by Nitzschia algae, which has a specific effect on cyanobacterial blooms, cyanobacterial blooms can be specifically decomposed and dissolved.

[0047] The embodiments of the present invention are described above, but the present invention is not limited to the above embodiments and can be changed and modified without departing from the scope of the present invention. The above embodiments include substantially the same methods and can also be appropriately combined. Based on the embodiments disclosed in this application, all other embodiments obtained by ordinary technicians in this field without creative work are obviously also included in the scope of protection of this application.

[0048] Description of Reference Numerals

[0049] 1-Nitzschia, 2-Algae-lytic bacteria, 3-Cyanobacteria, 10-Device for providing Nitzschia carrying algae-lytic bacteria, 11-Upper transverse support, 12-Lower transverse support, 13-Longitudinal support, 14-Roller, 15-Nitzschia carrier, 151-Belt-shaped carrier, 152-Nitzschia inducing carrier, 16-Algae-lytic bacteria container, 17-Algae-lytic bacteria supply tank, 18-Blue light irradiation module, 19-Wheels, 20-Support arm, 21-Upper water level sensor, 22-Lower water level sensor, 23-Control unit.

Claims

1. A device for providing Nitzschia algae carrying algae-lysing bacteria, characterized in that: include: a frame comprising an upper transverse support, a lower transverse support, and longitudinal supports supporting the upper transverse support and the lower transverse support; A blue light irradiation module is provided near the bottom of the frame and is used to irradiate blue light toward the Nitzschia algae at the bottom of the water body; a plurality of rollers rotatably supported on respective ends of the upper transverse support and the lower transverse support; a Nitzschia carrier, which is tensioned and mounted on the plurality of rollers, attaches the Nitzschia from the substrate, and carries the Nitzschia to circulate as the plurality of rollers rotate; as well as The algae-lysing bacteria accommodating box is arranged on the moving path of the Nitzschia algae carrier and contains algae-lysing bacteria therein, so that the Nitzschia algae carried by the Nitzschia algae carrier passing through the box comes into contact with the algae-lysing bacteria.

2. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 1, characterized in that: The algae-lysing bacteria supply tank is further included, which stores algae-lysing bacteria and supplies the algae-lysing bacteria to the algae-lysing bacteria housing box.

3. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 1, characterized in that: The Nitzschia carrier comprises: a belt-shaped carrier, stretched on the plurality of rollers and cyclically moving with the rotation of the plurality of rollers; and The Nitzschia inducing carrier is arranged on the surface of the belt-shaped carrier and attaches the Nitzschia to the substrate by contacting the substrate.

4. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 3, characterized in that: The Nitzschia inducing carrier is arranged on the surface of the strip-shaped carrier in a fiber shape, with one end fixed on the surface of the strip-shaped carrier and the other end being a free end.

5. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 1, characterized in that: The number of the Nitzschia algae carriers is one or a plurality of Nitzschia algae carriers are arranged in parallel.

6. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 3, characterized in that: The tape-shaped carrier is formed of a light-transmitting resin film.

7. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 1, characterized in that: The blue light irradiation module includes a blue light LED.

8. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 1, characterized in that: The upper transverse support is a support that can be extended horizontally, and the longitudinal support is a support that can be extended vertically; The providing device also includes: Upper and lower water level sensors are arranged vertically up and down via support arms at a position a predetermined distance higher than the highest part of the Nitzschia carrier, and output an electrical signal indicating whether the carrier is in contact with water; and a control unit that receives the electrical signals output by the upper and lower water level sensors and controls the extension and retraction of the upper transverse support and the longitudinal support based on the received electrical signals; So that the highest part of the Nitzschia carrier is at a predetermined water depth.

9. The device for providing Nitzschia algae carrying algae-lysing bacteria according to claim 8, characterized in that: The support arm is a telescopic arm, and the predetermined water depth position is adjusted by telescoping.

10. A method for providing Nitzschia algae carrying algae-lytic bacteria, characterized in that: include: placing the device for providing Nitzschia algae carrying algae-lytic bacteria according to any one of claims 1 to 9 into the bottom of water; irradiating the bottom of the water body with blue light through the blue light irradiation module to activate the Nitzschia algae on the bottom; as well as The plurality of rollers are driven to rotate to drive the Nitzschia carriers to circulate, so that: the Nitzschia carriers contact the substrate to attach the activated Nitzschia, and carry the Nitzschia through the algae-lytic bacteria holding box containing algae-lytic bacteria to generate Nitzschia carrying algae, and then transport the Nitzschia carrying algae to the surface layer of the water body so that it comes into contact with the cyanobacteria in the surface layer.

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