A lake and reservoir eutrophication water pollution control system for algae removal and turbidity reduction using sound-bacteria-insect-fish tandem

Abstract

The present invention relates to a lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound-bacteria-insect-fish in series, which comprises a self-circulating flow channel, in which an ultrasonic treatment area, an algae-dissolving bacteria and zooplankton treatment area and a fish treatment area are separated by a bubble curtain in the self-circulating flow channel, the ultrasonic treatment area is provided with a plurality of ultrasonic generating devices, the algae-dissolving bacteria and zooplankton treatment area is provided with an algae-dissolving bacteria and zooplankton expansion and transportation device, and filter-feeding fish are placed in the fish treatment area. The advantage is that the system combines physical algae control and biological algae control technology, firstly, ultrasonic waves are used to break up the clumping cyanobacteria groups, and then algae-dissolving bacteria are used to dissolve and destroy the gelatin on the surface of the broken cyanobacteria cells, and the cyanobacteria cells after the gelatin is destroyed can be better and faster eaten and digested by zooplankton and fish, and the fish are caught out of the water body after they grow up, so as to realize the recovery and removal of nutrients, and the system has a strong effect of removing algae and reducing turbidity, which is suitable for the restoration and maintenance of the ecological environment of lakes and reservoirs.

Description

Technical Field

[0001] The present invention belongs to the field of water pollution control and water ecological restoration, and relates to a blue algae reduction and nutrient salt recovery technology that connects ultrasound, algae-lytic bacteria, zooplankton and fish in series, and specifically relates to a lake and reservoir eutrophication water pollution control system that removes algae and reduces turbidity by connecting ultrasound, algae-lytic bacteria, zooplankton and fish in series. Background Art

[0002] Eutrophication is a water pollution phenomenon caused by excessive content of plant nutrients such as nitrogen and phosphorus. As a global ecological and environmental problem, one of the most direct manifestations of eutrophication is cyanobacterial blooms. Cyanobacterial blooms can lead to a series of problems such as a sharp decrease in water transparency, a large loss of biodiversity, and a reduction in the service functions of water ecosystems. In addition, cyanobacteria in blooms can also produce toxic secondary metabolites, which directly endanger drinking water safety and pose a public health risk.

[0003] At present, the control technologies of cyanobacteria blooms are mainly divided into physical algae control, chemical algae control and biological algae control technologies. Among them, chemical algae control technology mainly involves adding algaecides or algaecides to the water body. This type of method takes effect quickly, but the added agents may cause hidden dangers such as secondary pollution or concentrated release of intracellular toxins. Physical algae control technologies mainly include mechanical algae removal, flotation algae removal, ultrasonic algae control and deep well pressurization, but they have disadvantages such as high cost and lack of long-term effectiveness. Biological algae control technology mainly uses algae-eating zooplankton, algae-eating fish and higher aquatic plants to control the biomass of cyanobacteria in water blooms, but there are problems such as slow effect and unstable effect. Therefore, how to fully integrate the advantages of existing cyanobacteria bloom control technologies, improve the removal efficiency of cyanobacteria in water blooms, and establish a long-term mechanism for clear water steady state is an urgent need for the current eutrophication control of lakes and reservoirs. Summary of the invention

[0004] The present invention provides a lake and reservoir eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series, aiming to overcome the above-mentioned deficiencies in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a lake eutrophic water pollution control system for removing algae and reducing turbidity in series with sound-bacteria-insect-fish, which includes a self-circulating flow channel for continuous flow of lake water, and the bubble curtain generated by the bubble curtain generating device arranged at intervals in the self-circulating flow channel along the flow direction of the water flow separates the ultrasonic treatment area, the algae-lytic bacteria and zooplankton treatment area and the fish treatment area, the ultrasonic treatment area is provided with a plurality of ultrasonic generating devices for breaking up the algae entering with the water flow, the algae-lytic bacteria and zooplankton treatment area is provided with a diffusion and conveying device for supplementing algae-lytic bacteria and zooplankton into the water flow, filter-feeding fish are placed in the fish treatment area, the bubble curtain generating device has a driving motor with an adjustable bubble ejection angle to adjust the flow velocity of the water flow in the self-circulating flow channel, a flow velocity measuring device and an online microbial analysis and measuring device are also provided in the self-circulating flow channel, and the bubble curtain generating device, the ultrasonic generating device, the diffusion and conveying device, the flow velocity measuring device and the online microbial analysis and measuring device are respectively electrically connected to the integrated controller.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the self-circulating flow channel is arranged in a lake branch or reservoir bay downwind where the water flow is gentle and algal blooms are easy to gather. The self-circulating flow channel is a flow channel arranged in situ in the lake or reservoir or a flow channel excavated as a bypass.

[0008] Furthermore, the in-situ laid flow channel is a flow channel naturally formed in a lake branch or a reservoir bay, or a flow channel enclosed in a lake branch or a reservoir bay by using waterproof enclosure cloth.

[0009] Furthermore, the bypass excavation channel is a ditch excavated near the shore of a lake branch or reservoir bay, with both ends connected to the lake or reservoir.

[0010] Furthermore, the bubble curtain generating device includes an air pump, a single-side perforated permeation tube and a mounting frame, the air pump is used to transport air to the single-side perforated permeation tube, the single-side perforated permeation tube is connected to the mounting frame, and the drive motor is used to drive the single-side perforated permeation tube to rotate around the central axis.

[0011] Furthermore, a plurality of the single-side perforated permeation tubes are fixed side by side on the mounting frame, and the single-side perforated permeation tubes are rotatably connected to two parallel and spaced mounting plates on the mounting frame via bearing members disposed on the outer tube shells, and the driving motor drives a rotating shaft to rotate, and a plurality of driving gears are coaxially and spaced on the rotating shaft, and a driven gear is fixedly sleeved on each of the single-side perforated permeation tubes, and the driving gear and the driven gear are connected via a synchronous belt transmission.

[0012] Furthermore, there are multiple ultrasonic generating devices and they are distributed in an array on two opposite side walls of the ultrasonic treatment area of ​​the self-circulating flow channel.

[0013] Furthermore, the expansion and cultivation transport device includes an inoculation tank, an expansion and cultivation box and an external transfer pump. The inoculation tank is connected to the expansion and cultivation box, the inlet of the external transfer pump is connected to the expansion and cultivation box, and the outlet is connected to the algae-lysing bacteria spray head or the zooplankton supplement pipe.

[0014] Furthermore, the flow rate measuring device is arranged at the entrance of the self-circulating flow channel, the online microbial analysis and measuring device is arranged in the algae-lytic bacteria and zooplankton treatment area, and scraping fish, snails and / or shrimps are also placed in the fish treatment area.

[0015] Furthermore, the volumes of the algae-lytic bacteria zooplankton treatment zone and the fish treatment zone are respectively 3-50 times the volume of the ultrasonic treatment zone, the water flow velocity in the ultrasonic treatment zone is 0.1-0.5 m / s, and a gate with an adjustable opening is provided at the inlet or outlet of the self-circulation flow channel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The invention organically combines physical algae control and biological algae control technologies, and sequentially separates an ultrasonic treatment area, an algae-dissolving bacteria and zooplankton treatment area and a fish treatment area in a self-circulating flow channel along a water flow direction by a bubble curtain generating device. First, ultrasonic waves are used to break up agglomerated cyanobacteria groups, and then algae-dissolving bacteria are used to dissolve and destroy the gelatin on the surface of cyanobacteria cells in the algae-dissolving bacteria and zooplankton treatment area. The cyanobacteria cells with the destroyed gelatin can be better and faster eaten and digested by zooplankton and fish, thereby being consumed in large quantities. At the same time, when the algae-dissolving bacteria in the treatment area reproduce rapidly, they can also quickly consume nitrogen, phosphorus and other elements in the water body, so that the growth and proliferation of algae are limited due to insufficient nutrition, and the algae-dissolving bacteria themselves can also be consumed as zooplankton food; the remaining cyanobacteria cells and part of the zooplankton enter the fish treatment area with the water flow and become food for filter-feeding and scraping fish. After the fish grow up, they are caught and eaten, thereby forming a closed loop of material flow and energy flow, nutrient salts are recovered, and eutrophic water pollution is effectively controlled. This technology has the advantages of high integration, strong algae removal and turbidity reduction effects, good resource utilization of blue algae, and great economic benefits of additional fish products. It is suitable for the restoration and maintenance of the ecological environment of lakes and reservoirs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a lake and reservoir eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series provided by the present invention, wherein the self-circulating flow channel is surrounded by waterproof enclosure cloth;

[0019] Figure 2 for Figure 1 The schematic diagram of the lake and reservoir eutrophic water pollution control system using acoustic-bacteria-insect-fish series algae removal and turbidity reduction adopts a self-circulating flow channel excavated by bypass;

[0020] Figure 3 for Figure 2 A schematic diagram of the structure of the bubble curtain generating device of the lake eutrophic water pollution control system for removing algae and reducing turbidity by using medium sound-bacteria-insect-fish in series (each bubble curtain generating device uses at least three single-side perforated permeation tubes arranged side by side to generate the bubble curtain);

[0021] Figure 4 for Figure 2 Schematic diagram of the expansion and transportation device of the lake and reservoir eutrophic water pollution control system using medium sound-bacteria-insects-fish in series to remove algae and reduce turbidity.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Self-circulating flow channel; 10. Bubble curtain generating device; 11. Ultrasonic treatment area; 12. Algae-lytic bacteria and zooplankton treatment area; 13. Fish treatment area; 14. Flow rate measuring device; 15. Online microbial analysis and measuring device; 16. Integrated controller; 111. Ultrasonic generating device; 121. Culture expansion and transportation device; 101. Driving motor; 102. Air pump; 103. Single-side perforated permeation tube; 104. Mounting frame; 1041. Mounting plate; 105. Bearing; 106. Rotating shaft; 107. Driving gear; 108. Driven gear; 109. Synchronous belt; 1211. Inoculation tank; 1212. Culture expansion box; 1213. External transfer pump; 1214. Algae-lytic bacteria spray head; 1215. Zooplankton supplementary pipe. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings and specific embodiments. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] In the description of the present invention, if terms indicating orientation such as "up", "down", "left", "right", "top", "bottom", "inside" and "outside" are used, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] like Figures 1 to 4As shown, the present invention provides a lake eutrophication water pollution control system for removing algae and reducing turbidity by an acoustic-bacteria-insect-fish series, which comprises a self-circulating flow channel 1 for continuous flow of lake water, wherein the bubble curtain generated by the bubble curtain generating device 10 arranged at intervals in the self-circulating flow channel 1 along the flow direction of the water flow separates an ultrasonic treatment area 11, an algae-lysing bacteria and zooplankton treatment area 12 and a fish treatment area 13, wherein the ultrasonic treatment area 11 is provided with a plurality of ultrasonic generating devices 111 for breaking up algae clumps entering with the water flow, and the algae-lysing bacteria and zooplankton treatment area 12 is provided with a plurality of ultrasonic generating devices 111 for injecting ultrasonic waves into the water flow. A culture expansion and transportation device 121 is provided for supplementing algae-dissolving bacteria and zooplankton. Filter-feeding fish are placed in the fish processing area 13. The bubble curtain generating device 10 has a driving motor 101 which can adjust the bubble ejection angle to adjust the water flow velocity in the self-circulating flow channel 1. A flow velocity measuring device 14 and an online microbial analysis and measurement device 15 are also provided in the self-circulating flow channel 1. The bubble curtain generating device 10, the ultrasonic generating device 111, the culture expansion and transportation device 121, the flow velocity measuring device 14 and the online microbial analysis and measurement device 15 are electrically connected to the integrated controller 16 respectively.

[0027] It should be noted that all relevant devices are electrically connected to the integrated controller, which can achieve real-time monitoring and dynamic adjustment to ensure that the algae-containing water flows through the ultrasonic treatment area, the algae-lytic bacteria and zooplankton treatment area, and the fish treatment area in sequence before the clean water returns to the lake and reservoir.

[0028] In the present invention, the ultrasonic wave generator in the ultrasonic treatment area fully acts on the algae-containing water flow through the ultrasonic wave, and the ultrasonic wave can cause mechanical effect, thermal effect, cavitation effect, pseudo-cavitation bubble rupture and free radical effect on the cyanobacteria, and has multiple effects such as depolymerizing the cyanobacteria group, destroying the cyanobacterial gelatin, changing the cell surface morphology, damaging the intracellular photosynthetic lamella structure, promoting the sedimentation of cyanobacteria, inhibiting the growth of cyanobacteria, and improving the biological feeding rate, digestibility and assimilation rate of cyanobacteria. In addition, the ultrasonic wave treatment with appropriate intensity and duration will not cause cell rupture and the release of intracellular toxins. In addition, the ultrasonic array can also flexibly adjust the parameters such as power, frequency and treatment duration according to the specific dominant species of water bloom cyanobacteria, or emit ultrasonic waves of different powers and frequencies to achieve the purpose of simultaneously treating mixed water bloom cyanobacteria.

[0029] like Figure 1 and Figure 4As shown, the algae-dissolving bacteria sprayed by the expansion and transportation device 121 for supplementing algae-dissolving bacteria and zooplankton can dissolve the cell walls of algae cells, degrade algal toxins, inhibit the growth of algae and even kill the blooming cyanobacteria. The algae-dissolving bacteria combined with the upstream ultrasonic treatment can further depolymerize the cyanobacteria group and kill the cyanobacteria cells. The organic particles after the decomposition of the cyanobacteria and the algae-dissolving bacteria themselves can be used as food for zooplankton and fish, thereby promoting the efficient transfer of substances and energy upward along the food chain, achieving the purpose of removing algae and reducing turbidity, purifying water bodies, and producing fish products.

[0030] In one embodiment of the present invention, the self-circulating flow channel 1 is arranged in a lake branch or reservoir bay downwind with gentle water flow and easy accumulation of algal blooms. The self-circulating flow channel 1 is an in-situ flow channel of the lake or reservoir or a bypass excavated flow channel.

[0031] In one embodiment of the present invention, the in-situ laid flow channel is a flow channel naturally formed in a lake branch or a reservoir bay, or a flow channel enclosed in a lake branch or a reservoir bay by using waterproof enclosure cloth.

[0032] In one embodiment of the present invention, the bypass channel is a ditch excavated near the shore of a lake branch or reservoir bay, with both ends connected to the lake or reservoir. Figure 2 As shown, the corresponding self-circulating flow channel is the bypass excavation flow channel formed by excavation near the shore. The bypass excavation flow channel and the lake eutrophication water pollution control system for algae removal and turbidity reduction using sound, bacteria, insects and fish in series set therein are equivalent to the "kidneys" of the lake and reservoir, purifying the eutrophic water body.

[0033] It should be noted that the best choice for in-situ flow channel is the one that is naturally formed in the lake or reservoir bay. It does not require the investment of enclosure structures on both sides, nor does it require the excavation of ditches, and the cost is relatively low. The disadvantage is that there are few naturally formed self-circulating flow channels in natural water bodies. When the flow channel is formed by using waterproof enclosure cloth, an anchoring structure should be set up on the bottom of the water to fix the waterproof enclosure cloth from the bottom, and necessary floats or frames should be set up on the top to fix the waterproof enclosure cloth.

[0034] In one embodiment of the present invention, the bubble curtain generating device 10 comprises an air pump 102, a single-side perforated permeation tube 103 and a mounting frame 104, wherein the air pump 102 is used to deliver air to the single-side perforated permeation tube 103, the single-side perforated permeation tube 103 is connected to the mounting frame 104, and the drive motor 101 is used to drive the single-side perforated permeation tube 103 to rotate around the central axis. A bubble curtain generating device may have one or more single-side perforated permeation tubes, each of which may be driven by a single drive motor to rotate and swing left and right, and generally the maximum left and right swing angle is within 150 degrees.

[0035] It should be noted that the air curtain generated by the bubble curtain generating device has multiple functions such as controlling flow rate, blocking organisms, increasing oxygen aeration, offsetting sound waves, resuspending algae and mixing algae and bacteria. Among them, in terms of controlling flow rate, the flow meter uploads real-time flow rate information to the integrated controller. On the one hand, the integrated controller controls the drive motor to adjust the angle between the polyethylene perforated permeation tube (single-side perforated permeation tube) and the bottom of the flow channel, and on the other hand, controls the air pump power and the gas flow control valve to adjust the air curtain intensity. The two jointly participate in controlling the flow rate; in terms of blocking organisms, the air curtain can produce multiple stimuli such as vision, hearing, lateral line sensation and touch to fish, and can effectively block fish and other aquatic organisms from entering and escaping the flow channel; in terms of offsetting sound waves, the air curtain can dissipate the energy of ultrasonic waves by scattering and absorbing ultrasonic waves, and effectively reduce the energy overflow from both sides of the ultrasonic array; in terms of algae resuspension and algae-bacteria mixing, the bottom-up air curtain can promote the resuspension of cyanobacteria, which is beneficial to their utilization by aquatic organisms in the water column; in addition, the air curtain can also promote the full mixing of the added algae-lytic bacteria and cyanobacteria, thereby enhancing the algae-lytic and algae-killing effects.

[0036] In one embodiment of the present invention, Figure 3 A plurality of the single-side perforated permeation tubes 103 are fixed side by side on a mounting frame 104, and the single-side perforated permeation tubes 103 are rotatably connected to two parallel and spaced mounting plates 1041 on the mounting frame 104 through a bearing 105 disposed on the outer tube. The driving motor 101 drives a rotating shaft 106 to rotate, and a plurality of driving gears 107 are coaxially and spaced fixedly disposed on the rotating shaft 106, and a driven gear 108 is fixedly sleeved on each of the single-side perforated permeation tubes 103, and the driving gear 107 is connected to the driven gear 108 through a synchronous belt 109. The mounting frame sinks into the bottom of the flow channel and is fixed by a counterweight or an anchor pile. A driving motor can drive the multiple single-side perforated permeation tubes on the same mounting frame to rotate synchronously through a synchronous belt and a master and slave gear, thereby adjusting the direction of bubble ejection to accelerate or slow down the flow of water. In addition to the above-mentioned structural setting, each single-side perforated permeation tube can also be driven to rotate separately by a driving motor that is respectively matched with each other. The single-side perforated permeation tube is preferably a hard round tube with holes only on one side of the tube wall. One end of the permeation tube is closed, and the other end is connected to the air pump through a hose or is rotatably connected to the air outlet on the buffer box body through a rotating seal.

[0037] It should be noted that each bubble curtain generating device can be used as a power source for the flow of water in the self-circulating flow channel. When all the bubble curtain generating devices are not sufficient to provide sufficient self-circulating flow power, a water pump, a motor with propeller blades and other power devices can be added to the self-circulating flow channel to provide the self-circulating power of the water flow. Preferably, when the lake itself is equipped with a pump station or landscape project that increases the flow capacity of the water body, the pump station and the landscape project can be used to provide water flow power for the self-circulating flow channel.

[0038] In one embodiment of the present invention, Figure 1 As shown, there are multiple ultrasonic generating devices 111 and they are distributed in an array on two opposite side walls of the ultrasonic treatment area 11 of the self-circulating flow channel 1.

[0039] It is understandable that if Figure 2 As shown, the array-distributed ultrasonic generating devices can also be arranged at the bottom of the ultrasonic treatment area or distributed in upper and lower layers at intervals.

[0040] In one embodiment of the present invention, the expansion and transportation device 121 includes an inoculation tank 1211, an expansion box 1212 and an external transfer pump 1213. The inoculation tank 1211 is connected to the expansion box 1212, the inlet of the external transfer pump 1213 is connected to the expansion box 1212, and the outlet is connected to the algae-lysing bacteria spray head 1214 or the zooplankton supplement pipe 1215.

[0041] It should be noted that if Figure 2 As shown, the algae-dissolving bacteria expansion device and the zooplankton expansion device are independently set, the former can spray a bacterial solution containing a high concentration of algae-dissolving bacteria into the algae-dissolving bacteria and zooplankton treatment area, and the latter can inject a liquid containing a high concentration of zooplankton into the algae-dissolving bacteria and zooplankton treatment area. The structure of the expansion and transportation device is well known to those skilled in the art and will not be repeated here.

[0042] In one embodiment of the present invention, the flow rate measuring device 14 is arranged at the entrance of the self-circulating flow channel 1, the online microbial analysis and measuring device 15 is arranged in the algae-lytic bacteria and zooplankton treatment area 12, and the fish treatment area 13 is also stocked with scraping fish, snails and / or shrimps.

[0043] In one embodiment of the present invention, the volumes of the algae-lytic bacteria zooplankton treatment zone 12 and the fish treatment zone 13 are respectively 3-50 times the volume of the ultrasonic treatment zone 11, the water flow velocity in the ultrasonic treatment zone 11 is 0.1-0.5 m / s, and a gate with adjustable opening is provided at the inlet or outlet of the self-circulation flow channel 1.

[0044] It should be noted that the volume of the algae-lytic bacteria and zooplankton treatment area and the fish treatment area should be appropriately expanded to ensure that the hydraulic retention time is extended while the inlet and outlet flow rates remain unchanged, thereby enhancing the effectiveness of microorganisms and fish in removing algae blooms.

[0045] The present invention can refer to the following steps when constructing the above-mentioned sound-bacteria-insect-fish series algae removal and turbidity reduction lake eutrophication water pollution control system:

[0046] Step 1: Preliminary investigation: Investigate the biological and non-biological characteristics of the newly built waters, including lake and reservoir geology, hydrometeorology, shore conditions, nutrient levels, underwater vegetation, water quality, plankton, fish structure, etc., to determine construction conditions.

[0047] Step 2: Determine the targets of prevention and control: Identify the types of algae with algal bloom risks, biological characteristics, critical conditions for outbreaks, aggregation areas, outbreak areas, etc., evaluate the main reduction time periods and load reductions, and develop the best prevention and control plan, including the ultrasonic parameters used, the types, total amounts and ratios of algae-lytic bacteria, zooplankton and fish released.

[0048] Step 3, project site selection and construction: The site selection of the flow channel should give priority to the lake branch and reservoir bay with downwind direction, gentle water flow, and easy accumulation of algae blooms. The flow channel can be laid in situ in the lake or reservoir according to the actual conditions, or the flow channel can be excavated in the bypass. The in-situ flow channel is constructed with waterproof enclosure cloth, and the bypass flow channel is constructed with natural soil and stone base after excavation or poured with cement. The volume of the algae-dissolving bacteria and zooplankton treatment area and the fish treatment area should be appropriately expanded to ensure that the hydraulic retention time is extended under the condition of unchanged inlet and outlet flow rate, and the effect of microorganisms and fish in removing algae blooms is enhanced.

[0049] Step 4: System operation and maintenance: After the air curtain device is turned on, due to the push flow and segmentation effect of the air curtain, a stable water flow will be formed that flows through the inlet, ultrasonic treatment area, algae-dissolving bacteria and zooplankton treatment area, fish treatment area, and outlet in sequence. The flow meter records the water flow velocity, and the ultrasonic array performs ultrasonic treatment on the water flow; the online microbial analysis and measurement device takes water samples in the flow channel in situ and analyzes them, and classifies and counts bacteria, algae, and zooplankton, etc. and calculates their density; all the above monitoring data will be summarized in real time to the integrated controller, which will uniformly control the air pump power, the rotation angle of the drive motor, the ultrasonic array power, the start and stop of the algae-dissolving bacteria spraying device, etc., to achieve the optimal algae removal and turbidity reduction and nutrient salt recovery effect.

[0050] The initial parameter settings of each part of the lake eutrophication water pollution control system are as follows:

[0051] (1) Ultrasonic parameters: The reference frequency for Microcystis aeruginosa is 20-40 kHz, and the power density is 8-40 kW / m 3 , action time 60s; Anabaena reference frequency is 20~1144kHz, power 200~600W, action time 1~5min;

[0052] (2) Algae-lytic bacteria parameters: The algae-lytic bacteria used are mainly Bacillus sp., Actinomyces sp., Streptomyces sp., Pseudomonas sp., etc. The reference value of the amount of algae released is 1g DW / m3 ;

[0053] (3) Zooplankton parameters: The zooplankton released were mainly rotifers and cladocerans, such as Brachionus sp., Bosmina sp., Daphnia sp., etc. The reference density of release was 10 4 ~10 5 ind. / m 3 ;

[0054] (4) Fish parameters: The fish released are mainly silver carp and bighead carp, and the reference value of the release amount is 50-100g / m3.

[0055] In addition, it should be emphasized that when the flow rate regulation exceeds the control capacity of the bubble curtain generating device, a water cut-off gate or a push-flow water pump can be added at the inlet and outlet to assist in regulating the flow rate; filter-feeding benthic organisms such as river clams, scraper-feeding benthic organisms such as ring-edge snails, scraper-feeding fish such as dace, omnivorous carp and crucian carp, detritus-feeding swamp shrimp, etc. can be cultured in the fish treatment area to increase the complexity of the food web and the energy flow pathway, thereby improving the efficiency of the ecosystem and adding economic value.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series, characterized in that: The invention comprises a self-circulating flow channel (1) for continuous flow of lake water, wherein the self-circulating flow channel (1) is separated into an ultrasonic treatment area (11), an algae-dissolving bacteria and zooplankton treatment area (12) and a fish treatment area (13) by bubble curtains generated by bubble curtain generating devices (10) arranged at intervals along the flow direction of the water flow, wherein the ultrasonic treatment area (11) is provided with a plurality of ultrasonic generating devices (111) for breaking up algae masses entering with the water flow, and the algae-dissolving bacteria and zooplankton treatment area (12) is provided with a culture and transportation device (121) for replenishing algae-dissolving bacteria and zooplankton in the water flow, Filter-feeding fish are placed in the fish processing area (13); the bubble curtain generating device (10) has a driving motor (101) capable of adjusting the bubble ejection angle to adjust the flow velocity of water in the self-circulating flow channel (1); a flow velocity measuring device (14) and an online microbial analysis and measurement device (15) are also provided in the self-circulating flow channel (1); the bubble curtain generating device (10), the ultrasonic generating device (111), the culture diffusion and transportation device (121), the flow velocity measuring device (14) and the online microbial analysis and measurement device (15) are respectively electrically connected to an integrated controller (16).

2. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 1 is characterized in that: The self-circulating flow channel (1) is arranged in a lake branch or reservoir bay downwind, where the water flow is gentle and algal blooms are easy to gather. The self-circulating flow channel (1) is a flow channel arranged in situ in the lake or reservoir or a flow channel excavated as a bypass.

3. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 2 is characterized in that: The in-situ laid flow channel is a flow channel naturally formed in a lake branch or a reservoir bay, or a flow channel enclosed in a lake branch or a reservoir bay by using waterproof enclosure cloth.

4. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 2 is characterized in that: The bypass excavation flow channel is a ditch excavated near the shore of a lake branch or a reservoir bay, with both ends connected to the lake or reservoir.

5. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 1 is characterized in that: The bubble curtain generating device (10) comprises an air pump (102), a single-side perforated permeation tube (103) and a mounting frame (104); the air pump (102) is used to deliver air to the single-side perforated permeation tube (103); the single-side perforated permeation tube (103) is connected to the mounting frame (104); and the driving motor (101) is used to drive the single-side perforated permeation tube (103) to rotate around a central axis.

6. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 5 is characterized in that: A plurality of the single-side perforated permeation tubes (103) are fixed side by side on the mounting frame (104); the single-side perforated permeation tubes (103) are rotatably connected to two parallel and spaced mounting plates (1041) on the mounting frame (104) via a bearing member (105) disposed on the outer tube shell; the driving motor (101) drives a rotating shaft (106) to rotate; a plurality of driving gears (107) are coaxially and spacedly fixed on the rotating shaft (106); a driven gear (108) is fixedly sleeved on each of the single-side perforated permeation tubes (103); the driving gear (107) and the driven gear (108) are connected by a synchronous belt (109).

7. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 1 is characterized in that: There are a plurality of ultrasonic generating devices (111) distributed in an array on two opposite side walls of the ultrasonic treatment area (11) of the self-circulating flow channel (1).

8. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 1 is characterized in that: The culture expansion and transportation device (121) comprises an inoculation tank (1211), a culture expansion box (1212) and an external transfer pump (1213); the inoculation tank (1211) is connected to the culture expansion box (1212); the inlet of the external transfer pump (1213) is connected to the culture expansion box (1212); and the outlet is connected to an algae-lysing bacteria spray head (1214) or a zooplankton supplement pipe (1215).

9. The lake eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to claim 1 is characterized in that: The flow rate measuring device (14) is arranged at the entrance of the self-circulating flow channel (1), the online microbial analysis and measuring device (15) is arranged in the algae-lytic bacteria and zooplankton treatment area (12), and scraping fish, snails and / or shrimps are also placed in the fish treatment area (13).

10. A lake and reservoir eutrophication water pollution control system for removing algae and reducing turbidity by using sound, bacteria, insects and fish in series according to any one of claims 1 to 9, characterized in that: The volumes of the algae-lysing bacteria zooplankton treatment zone (12) and the fish treatment zone (13) are respectively 3-50 times the volume of the ultrasonic treatment zone (11); the water flow velocity in the ultrasonic treatment zone (11) is 0.1-0.5 m / s; and a gate with an adjustable opening is provided at the inlet or outlet of the self-circulating flow channel (1).

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