CN111847650A - Algal bloom suppression device - Google Patents

Abstract

The invention relates to an algal bloom inhibition device, and belongs to the technical field of water body ecological restoration. The algal bloom suppression device comprises a shading part for interfering the transmittance of light with specific wavelength, a gas barrier part for reducing the gas exchange rate, a semi-permeable part for allowing inorganic or organic molecules with certain sizes to pass, a turbulent flow part for promoting gas-liquid mixing, an open space and an exchange interface for allowing gas and liquid to enter and exit, wherein the open space is formed by the shading part, the gas barrier part and the semi-permeable part in a surrounding mode. The algal bloom inhibition device can interfere the transmittance of illumination with a wavelength in a specific range on the surface of a water body, reduce the gas exchange rate on the surface layer of the water body, and guide light energy originally flowing to harmful algal blooms and beneficial algae in the carbon dioxide guide device so as to inhibit the growth of the algal blooms. The invention can realize the ecological niche replacement of the algal bloom, greatly advance the initial time of algal bloom control, and greatly reduce the cost and ecological risk of algal bloom treatment.

Description

An algal bloom suppression device

technical field

The invention belongs to the technical field of water body ecological restoration, and relates to an algal bloom suppression device.

Background technique

The rapid development of human society is accelerating the eutrophication of water bodies adjacent to human society. Driven by the intensification of water eutrophication and climate warming, algal bloom events have occurred frequently around the world in recent years, and the economic losses caused by algal bloom disasters have continued to increase. Algal bloom refers to the phenomenon of ecological imbalance caused by excessive reproduction of photoautotrophic microorganisms such as cyanobacteria. Its harm is manifested in many aspects: first, some types of algal blooms release algal toxins, threatening the safety of drinking water sources; second, once algal toxins are produced, they will accumulate in the food chain and cause food safety hazards; third, some algal blooms are produced during the growth process. Strong fishy smell, odorous and toxic gases such as hydrogen sulfide are produced when algal blooms die, which seriously threatens the health and normal life of nearby residents, and seriously damages the image of the city. Fourth, algal blooms consume a lot of dissolved oxygen in water at night, causing shortage of other aquatic organisms. Oxygen death, triggering a regional ecological crisis.

Once the ecologically dominant algal bloom occurs in a large water body, its huge size is difficult to reverse. For example, Taihu Lake has a water area of 2,338 square kilometers and a water storage capacity of 4.4 billion cubic meters. Some recent technical attempts, such as Chinese patent CN105200969B, enrich the cyanobacteria floating on the surface of the water body, detect the concentration of cyanobacteria and collect them using vortex wells. Although the collection efficiency of cyanobacterial biomass can be increased to a certain extent, it is not enough to reverse the algae from the ecological level. China's dominant position among primary producers of water bodies. Since there is a negative feedback regulation mechanism within the population when the algal bloom reaches a high concentration, this method will weaken the negative feedback mechanism of the algal bloom and prolong the damage time of the algal bloom. At the same time, this method cannot distinguish specific algal bloom species, and indiscriminately intervene in the target water body, which has certain ecological risks.

Some technical methods can inhibit cyanobacterial activity in a short period of time, but cannot solve the problem of algal bloom recurrence in a longer period of time. For example, Chinese published patent CN104310526B uses red laser to rapidly inhibit the activity of cyanobacteria, thereby controlling the outbreak of algal blooms. Taking the Taihu Lake area as an example, the growth period of cyanobacteria lasts from April to May every year to October, while the doubling time of most cyanobacteria in the logarithmic growth period only takes a few to a dozen hours. The method of controlling algal bloom disasters by short-term inhibitory activity can only delay the outbreak of algal blooms for a few days or even shorter, and the operating cost is too high, so it is not suitable for the prevention and control of algal bloom disasters in large water bodies.

Other technical methods can achieve algal bloom suppression for several weeks to several months by locking phosphorus and other means, but it will greatly increase the risk of algal blooms in the same water body and the difficulty of governance in the following year. For example, Chinese published patent CN109179857A reduces the degree of eutrophication of water bodies by locking phosphorus in the substrate, and at the same time assists biological means to rebuild the ecological balance of water bodies. The locking effect of phospho-locking reagents on soluble phosphate decreases over time, usually for weeks to months. After the phosphorus-locking reagent is put in, the phosphorus content in the water can be reduced in a short period of time. After the reagent is exhausted, the exogenous phosphorus will flow in rapidly, and the release of the chelated endogenous phosphate will increase with time. In the long run, the degree of eutrophication of water bodies will continue to deteriorate. Due to the above reasons, phosphorus-locking agents have been eliminated in key algal bloom control areas such as Taihu Lake, but they are still being used in areas where exogenous phosphorus elements are under less pressure.

The existing algal bloom control technologies mainly have three development directions: physical methods, chemical methods and biological methods. Although there are many existing technical solutions, the fact is that there is currently no effective response to algal bloom disasters in the world. This is mainly due to reasons such as cost, secondary pollution and ecological risks. The physical method has high energy consumption and high cost, and is suitable for algal bloom control in small water bodies. However, for algal bloom disasters in large water bodies, such as Taihu Lake in China and Lake Erie at the junction of the United States and Canada, the physical method cannot be implemented on a large scale due to cost and other reasons. . Chemical methods, such as the use of copper ions to kill algae and the use of quicklime to change the pH of water bodies, all have secondary pollution risks and high costs, and are also not suitable for algal bloom control in large water bodies. Biological methods, such as placing ecological floating islands composed of aquatic plants, placing filter-feeding fish, etc. Dropping predators can deplete a small percentage of cyanobacteria, but it also threatens other small plankton that prey on cyanobacteria, thereby disrupting ecosystem homeostasis. Furthermore, biological methods are easy to cause the accumulation and transmission of algal toxins in the food chain, bringing food safety hazards.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an algal bloom suppression device in view of the above-mentioned deficiencies of the prior art. Different from the traditional algal bloom treatment technology, the present invention is based on the biological characteristics of algal blooms, utilizes inhibition of light energy utilization and carbon dioxide absorption to inhibit photosynthesis of harmful algal blooms, and takes physical means for targeted intervention, which belongs to both physical methods. and biological methods of integrated management techniques. The algal bloom suppression device of the invention is suitable for the management and control of algal bloom disasters in large-scale water bodies, can solve the technical problems of high cost, low efficiency, high ecological risk, low nitrogen and phosphorus removal efficiency existing in the current algal bloom control technology, and can effectively reduce the abundance of algal blooms. The area and intensity of harmful algal blooms in nutrient water bodies enhance the water body's own ecological stability and self-healing ability.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: an algal bloom suppression device, comprising a light-shielding part that interferes with light transmittance of a specific wavelength, a gas-blocking part that reduces the gas exchange rate, and allows inorganic or organic molecules of a certain size to pass through. A semi-permeable part, a spoiler part for promoting gas-liquid mixing, an open space and an exchange interface for allowing gas and liquid to enter and exit, the open space is formed by the shading part, the gas barrier part and the semi-permeable part.

The shading part, the air barrier part, the semi-permeable part and the spoiler part are respectively independent parts with independent functions or a single part with two or more functions integrated together.

The open space contains a colorless or colored liquid, which is a solvent carrying chemicals or microorganisms that have an inhibitory effect on harmful algal blooms.

The shading part is arranged at the bottom or/and the top of the device, and uses an optical coating or relies on the optical properties of the material itself to affect the transmission of light in the wavelength range of 440-480nm and 640-730nm, and the effect includes allowing only the above wavelengths The transmission of light in the above wavelength range and the transmission of other visible light is blocked, or the transmission of only light in the above wavelength range is blocked and the transmission of other visible light is allowed.

The air barrier is located at the bottom of the device or in the area where the two sides directly contact the water body, and a hydrophobic coating is used or the physical and chemical properties of the material itself are used to reduce the exchange of tiny air bubbles, oxygen or carbon dioxide on both sides of the air barrier in a liquid environment.

The semi-permeable part is arranged in the area where the bottom or side of the device contacts the water where algal blooms grow. The semi-permeable part is made of natural fibers or synthetic polymers, which can delay or completely block the entry of particles larger than 0.2 microns in diameter into the device and allow Biomacromolecules with a molecular mass below 300kDa enter the device, but do not restrict the liquid or microorganisms inside the device from diffusing outward.

The open space is used for culturing microorganisms that have an inhibitory effect on algal blooms or can degrade algal toxins, and the liquid formed by the microorganisms and their culture solutions in the open space has obvious absorption peaks at 440-480 nm and 640-730 nm for incident light. .

The open space is used for holding liquid reagents that have an inhibitory effect on algal blooms, and dyes are added to the reagents to obtain light absorption peaks at 440-480 nm and 640-730 nm.

The spoiler is located at the position where the bottom or top of the device faces the inside of the device, and is directly connected to the shading portion or the air barrier to promote the mixing of the contents of the device. At the same time, the spoiler is embedded with an air channel and is provided with an air channel. release port.

The exchange interface is a single pipe or a composite pipe, which is used for the in and out of liquid and gas, and at the same time provides physical support so that the algal bloom suppression device is fixed in a specific space range on the surface of the water body.

Compared with the prior art, the present invention has the following advantages:

(1) The algal bloom suppression device of the present invention can reduce the photosynthetic intensity of photosynthetic microorganisms such as cyanobacteria in the water body, and intervene before the algal bloom occurs, which is different from the traditional algal suppression technology that can only intervene after the algal bloom occurs, The window period for algal bloom disaster management and control is greatly advanced.

(2) The present invention achieves a competitive advantage by supporting harmless or low-harm algae species inside the algal bloom suppression device, realizes high-concentration growth of algae in the device, releases secondary metabolites outside the device, and utilizes allelopathy Inhibition of algal blooms outside the device.

(3) The present invention achieves efficient degradation of algal toxins dissolved in water by supporting the growth of heterotrophic microorganisms capable of degrading algal toxins inside the algal bloom suppression device.

(4) The present invention achieves high-efficiency enrichment and recycling of nitrogen and phosphorus elements in the water body through the growth of autotrophic or heterotrophic microorganisms in the device and the recovery of the above-mentioned microorganisms.

(5) In addition to the installation, maintenance and recycling of the device, the entire treatment process requires extremely low energy consumption and negative carbon emissions.

Description of drawings

FIG. 1 is a perspective view of the structure of an algal bloom suppressing device according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view of the side structure of the algal bloom suppression device according to Embodiment 1 of the present invention.

FIG. 3 is a bottom structural view of the algal bloom suppression device in Example 1 of the present invention.

FIG. 4 is a perspective view of the partial structure of the turbulent part in the algal bloom suppression device according to Embodiment 1 of the present invention.

FIG. 5 is a bottom view of the disassembled structure of the spoiler in the algal bloom suppression device according to Embodiment 1 of the present invention.

FIG. 6 is a schematic diagram of the algal bloom suppression device in Example 1 of the present invention for suppressing the occurrence of algal blooms in large eutrophic water bodies.

FIG. 7 is a schematic diagram of the parallel connection of algal bloom suppression devices in Example 1 of the present invention for preventing algal blooms.

FIG. 8 is a schematic diagram of the parallel connection of algal bloom suppressing devices in Embodiment 1 of the present invention for suppressing algal bloom spreading.

FIG. 9 is a schematic structural diagram of an algal bloom suppression device in Example 2 of the present invention.

FIG. 10 is a perspective view of the structure of an algal bloom suppressing device according to Embodiment 2 of the present invention.

11 is a perspective view of the side structure of the algal bloom suppressing device according to the second embodiment of the present invention.

FIG. 12 is a bottom view of the structure of the upper half of the algal bloom suppression device according to the second embodiment of the present invention.

In the figure: 1-shading part; 2-air barrier; 3-semipermeable part; 4-turbulent part; 5-open space; 6-exchange interface; 7-airway; 8-airway release port; 9- Algae liquid and gas delivery pipeline; 10-shore storage tank; 11-top shading part; 12-bottom shading part.

Detailed ways

The working principle of the present invention is:

1. In eutrophic water, the main limiting factors for the growth of photosynthetic microorganisms such as cyanobacteria are not nutrients such as nitrogen and phosphorus, but light energy and carbon dioxide as the basic raw materials for photosynthesis. On the one hand, the currently known effective light energy that can drive oxygen-producing photosynthesis is mainly absorbed by chlorophyll a, b, d and f, and its absorption peaks are roughly between 440-480 nm and 640-730 nm. Therefore, blocking light in this wavelength range can effectively reduce the energy supply of algal blooms, thereby reducing their growth rate. On the other hand, as the main carbon source of cyanobacteria, carbon dioxide usually diffuses into the water body first, and then enters the algal cell through the membrane in the form of carbonate. The exchange rate of carbon dioxide in the gas-liquid phase is determined by the contact area between air and water. Reducing the contact area can reduce the diffusion rate of carbon dioxide, thereby limiting the rate of algal photosynthesis.

2. When cultivating algae, the upper limit of the concentration that the algal fluid can reach is mainly determined by the size of the cells and the volume of the culture fluid that can freely exchange nutrients and release secondary metabolites. When a certain concentration is reached, the algae population has a negative feedback mechanism, which makes the growth rate of the algae decrease and enter a stable period or even a decay period. Algae that reach a stable or dying stage of growth can inhibit the growth of other algae and photosynthetic organisms by releasing secondary metabolites.

Based on the above principles, the present invention provides a device that can artificially inhibit the photosynthesis of algal blooms, thereby interfering with the development of algal bloom disasters.

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Example 1

As shown in Figure 1-5, an algal bloom suppression device includes a light-shielding part 1 that reduces the transmittance of light of a specific wavelength, a gas barrier 2 that reduces the gas exchange rate, and a certain size range of inorganic or organic molecules to penetrate. The semi-permeable part 3, the turbulent part 4 for promoting the mixing of gas and liquid, the open space 5 and the exchange interface 6 for allowing the gas and liquid to enter and exit, the open space 5 is surrounded by the above-mentioned shading part 1, the gas barrier part 2 and the semi-permeable part 3 form.

In this embodiment, the shading part 1 , the air barrier part 2 , the semi-permeable part 3 and the spoiler part 4 are components with independent functions, which are mainly made of polymer materials such as polypropylene and polycarbonate.

The open space 5 initially contains a certain volume of water of the target water body, and the part of the water has been filtered out of solid particles and algae, and has been sterilized by hydrogen peroxide at the same time.

The shading portion 1 is arranged on the top and bottom of the device, and the top shading portion 11 adopts a red optical coating to allow light between wavelengths of 640 to 730 nm to transmit, providing light energy for photosynthetic microorganisms inside the device; the bottom shading portion 12 uses a green optical coating. The layer limits the transmission of light in the wavelength range of 440-480 nm and 640-730 nm, hindering the absorption of light energy by algal blooms outside the device.

The gas barrier 2 adopts a polypropylene coating with a thickness of more than 2 mm to prevent chemical corrosion of the device by external algal blooms, while reducing the exchange of tiny air bubbles, oxygen or carbon dioxide on both sides of the gas barrier, and the gas barrier 2 is arranged on the device. The surrounding area that is in direct contact with the water body.

The semi-permeable part 3 is located in the area where the bottom of the device contacts the water where algal blooms grow. The semi-permeable part 3 is a filter screen structure pressed by polypropylene fibers, which can delay the entry of tiny particles with a particle size of more than 0.2 microns into the device by free diffusion. It does not block the free diffusion of biological macromolecules with a molecular mass below 300kDa, nor does it restrict the diffusion of the liquid inside the device to the outside of the device. The semi-transparent part 3 and the bottom light shielding part 12 have consistent light selectivity, that is, the transmission of light in the wavelength range of 440-480 nm and 640-730 nm is restricted.

The open space 5 is used for cultivating competing cyanobacteria ( Synechococcus sp. PCC 11901 or Thermosynechococcus elongatus ) that have an inhibitory effect on algal blooms or capable of degrading algal toxins (Sphingomonas sp. Sphingopyxis and Sphingosinicella or Novosphingobium of the genus Novosphingobium ).

When the device is used in parallel, the open space 5 in some units can also be used to hold liquid reagents (such as low-concentration hydrogen peroxide) that have an inhibitory effect on algal blooms; the open spaces 5 in some units can add solid particles to Blocks the transmission of light with wavelengths ranging from 440 to 480 nm and 640 to 730 nm.

The spoiler 4 is arranged at the position where the shading portion 12 at the bottom of the device faces the open space 5, and under the action of an external force, the device shakes to promote the mixing of the contents of the device. At the same time, the spoiler 4 is embedded with an air channel 7 and is provided with an air channel. At the release port 8 , the air outside the device enters through the exchange interface 6 , and is released from the airway release port 8 to the inside of the device, and the liquid inside the device is output to the outside of the device through the airway release port 8 and the exchange interface 6 .

The exchange interface 6 is controlled by a multi-channel valve, which is used for the in and out of liquid and gas, and provides physical support to the device through an external pipeline, so that the algal bloom suppression device is fixed in a specific space range on the surface of the water body.

As shown in Figure 6, the algal bloom suppression device of this embodiment restricts the intensity of algal bloom photosynthesis in the target water body by reducing the illumination intensity of the transmitted light and reducing the carbon dioxide exchange rate between the air and the water body, thereby reducing its growth rate. At the same time, the photosynthetic microorganisms inside the device enrich the nitrogen and phosphorus elements in the target water body through growth and reproduction, and realize the allelopathy inhibition or direct chemical killing of the external algal bloom by the device by adjusting the microbial species or liquid components inside the device.

Figure 7 and Figure 8 show the actual application demonstration diagram. Figure 7 shows the prevention of algal bloom disasters in large water bodies by this device. One to two months before the start of algal blooms, two or more of the devices are connected in parallel to a centralized exchange water through the exchange interface 6 and the transmission pipeline 9. The lower conveying pipeline is laid in high-risk waters of algal bloom, and the device is inoculated with low-concentration harmless cyanobacteria. The parallel pipeline can output the algal liquid in the device to the collection station 10 on the water and on the shore, and can also input gas into each parallel device. Figure 8 shows the device's suppression of algal bloom disasters in large water bodies that have occurred. After the algal bloom occurs, the device is used to isolate and control the area where algal blooms have occurred in parallel, and 1%-99% of the device is inoculated inside High concentration of harmless cyanobacteria, the remaining parallel devices are fed with microorganisms that can degrade algal toxins, and the parallel pipes are mainly used to input gas into the device.

Example 2

As shown in Figure 9-12, an algal bloom suppression device includes a light-shielding part 1 that reduces the transmittance of light of a specific wavelength, a gas barrier 2 that reduces the gas exchange rate, and a semi-transparent part that allows inorganic or organic molecules of a certain size to penetrate. The permeable part 3 , the turbulent part 4 for promoting the mixing of gas and liquid, the open space 5 and the exchange interface 6 for allowing the gas and liquid to enter and exit. The device is made by laminating two upper and lower units with exactly the same size. Except for the different optical properties of the shading part, the upper and lower units have the same material in other parts.

In this embodiment, the shading part 1 , the air barrier part 2 , the semi-permeable part 3 and the spoiler 4 have independent functions, and are mainly made of polymer materials such as polypropylene and polycarbonate.

The open space 5 initially contains a certain volume of water of the target water body, and the part of the water has been filtered out of solid particles and algae, and has been sterilized by hydrogen peroxide at the same time.

The shading part 1 is arranged in the interval between the top and the bottom of the non-transparent part of the device, and the top shading part 11 adopts a red optical coating to transmit light between 640-730 nm, providing light energy for the photosynthetic microorganisms inside the device; the bottom shading part 12 The green optical coating is used to limit the transmission of light in the wavelength range of 440-480nm and 640-730nm, and hinder the absorption of light energy by algal blooms outside the device.

The gas barrier 2 is used as the side of the device, and a polypropylene coating with a thickness of more than 2 mm is used to prevent the chemical corrosion of the device by external algal blooms, and at the same time reduce the exchange of tiny bubbles, oxygen or carbon dioxide on both sides of the gas barrier, and the gas barrier The part 2 is located in the section where both sides of the device are in direct contact with the water body.

The semi-permeable part 3 is located in the area where the bottom of the device contacts the water where algal blooms grow. The semi-permeable part 3 is a filter screen structure pressed by polypropylene fibers, which can delay the entry of tiny particles with a particle size of more than 0.2 microns into the device by free diffusion. Inside, it does not block the free diffusion of biological macromolecules with a molecular mass below 300kDa, nor does it restrict the liquid inside the device from diffusing to the outside of the device. Transmission of light between 440-480 nm and 640-730 nm.

The open space 5 is used to cultivate competing cyanobacteria ( Synechococcus sp. PCC 11901 or Thermosynechococcus elongatus ) or microorganisms capable of degrading algal toxins (Sphingomonas sp. Sphingopyxis and Sphingosinicella of the genus or Novosphingobium of the genus Novosphingobacter ).

The spoiler 4 is fixed at the position of the top shading portion 11 and the bottom shading portion 12 facing the open space 5, but is not adhered to the semi-transparent portion 3. When the upper and lower units are attached, the spoiler 4 of the two units appears. Cross-shaped, the spoiler 4 promotes the mixing of the contents of the device when it shakes under the action of an external force.

The exchange interface 6 is a single channel, which is arranged on the top shading part 11 and the bottom shading part 12 for the in and out of liquid and gas. When used alone, the exchange interface 6 is provided with various connection ends. For example, the exchange interface 6 protrudes from the top shading portion 12 and is internally provided with threads, which can be connected to polymer containers with matching interfaces, such as mineral water bottles and beverage bottles. etc., by adjusting the communication status of the exchange interface, connecting additional containers can provide buoyancy and increase open space.

The above only describes the preferred embodiments of the present invention, but should not be construed as limiting the claims. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (10)

1. The algal bloom suppression device is characterized by comprising a shading part (1) interfering with the light transmittance of specific wavelength, a gas barrier part (2) reducing the gas exchange rate, a semi-permeable part (3) allowing inorganic or organic molecules of a certain size to pass through, a turbulent part (4) promoting the mixing of gas and liquid, an open space (5) and an exchange interface (6) allowing the gas and the liquid to enter and exit, wherein the open space (5) is formed by surrounding the shading part (1), the gas barrier part (2) and the semi-permeable part (3).

2. The algal bloom suppressing device according to claim 1, wherein the light shielding portion (1), the gas barrier portion (2), the semi-permeable portion (3) and the spoiler portion (4) are each a member whose functions are independent from each other or a single member in which two or more functions are integrated together.

3. An algal bloom suppression device according to claim 1, wherein the open space (5) contains therein a colorless or colored liquid which is a solvent carrying chemicals or microorganisms having an inhibitory effect on harmful algal blooms.

4. The algal bloom suppression device according to claim 1, wherein the light shielding part (1) is disposed at the bottom or/and the top of the device, and the light transmission in the wavelength ranges of 440-480 nm and 640-730 nm is affected by an optical coating or by the optical characteristics of the material itself, and the affecting effect includes allowing only the transmission of the light in the wavelength range and blocking the transmission of other visible light, or blocking only the transmission of the light in the wavelength range and allowing the transmission of other visible light.

5. The algal bloom suppression device according to claim 1, wherein the gas barrier (2) is located at the bottom or in the area where both sides of the device directly contact the water body, and the exchange of micro bubbles, oxygen or carbon dioxide in the liquid environment at both sides of the gas barrier (2) is reduced by adopting a hydrophobic coating or only depending on the physical and chemical properties of the material.

6. The algal bloom suppression device according to claim 1, wherein the semi-permeable part (3) is arranged in a region contacting with the algal bloom growth water area at the bottom or the side of the device, the semi-permeable part (3) is made of natural fiber or synthetic polymer, and can delay or completely block particles with a diameter of 0.2 micron or more from entering the device, and allow biomacromolecules with a molecular mass of 300kDa or less to enter the device, but not limit outward diffusion of liquid or microorganisms in the device.

7. The algal bloom suppression device according to claim 1, wherein the open space (5) is used for culturing microorganisms having an inhibitory effect on algal bloom or capable of degrading algal toxins, and the liquid formed by the microorganisms and the culture liquid in the open space (5) has distinct absorption peaks for incident light at 440-480 nm and 640-730 nm.

8. The algal bloom suppression device according to claim 1, wherein the open space (5) is used for containing a liquid reagent having an inhibitory effect on algal bloom, and a dye is added to the reagent to obtain light absorption peaks of 440 to 480nm and 640 to 730 nm.

9. Algal bloom suppression device according to claim 1, wherein the turbulence section (4) is located at the bottom or top of the device facing the inside of the device, directly connected to the light shielding section (1) or the air barrier section (2) for promoting the mixing of the device contents, while the turbulence section (4) is embedded in the air passage (7) and provided with an air passage release port (8).

10. The algal bloom suppression apparatus according to claim 1, wherein the exchange interface (6) is a single pipe or a composite pipe for ingress and egress of liquid and gas while providing physical support to enable the apparatus to be fixed to a specific spatial extent of the surface of a body of water.

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