A method for in-situ ecological treatment of river and lake sediment pollutants

Abstract

The present invention discloses an in-situ ecological treatment method for river and lake sediment pollutants, which relates to the field of river and lake treatment, and includes the following steps: zoning: constructing river and lake isolation fences, and dividing the bottom of the river and lake into a number of sediment pollution treatment units through the river and lake isolation fences; bacterial treatment: laying a bacterial pipe network in the sediment pollution treatment unit, adding microbial degradation colonies in the sediment pollution treatment unit through the bacterial pipe network, and laying a submerged plant blanket on the upper layer of the sediment pollution treatment unit. The present invention sets up independently separated sediment pollution treatment units at the bottom of rivers and lakes, and lays a bacterial pipe network based on these sediment pollution treatment units, so that the bacterial pipe network can sink into the sediment, so that the microbial degradation colonies in the bacterial pipe network can directly enter the sediment through the bacterial pipe network, and microbial decomposition and / or degradation of the sediment can be performed, which can greatly reduce the direct impact of water on microorganisms and improve the treatment effect of the sediment.

Description

Technical Field

[0001] The invention relates to the field of river and lake sediment treatment, and in particular to an in-situ ecological treatment method for river and lake sediment pollutants. Background Art

[0002] As is known to all, river and lake sediments are an important part of the water ecosystem, carrying abundant aquatic organisms and organic matter. With the acceleration of industrialization, the intensive agricultural production, and the pollution emissions caused by urbanization, river and lake sediments have gradually been polluted and become a gathering place for pollutants such as heavy metals, persistent organic pollutants (POPs), and nutrients. These pollutants not only affect the ecological balance of water bodies, but also pose a threat to drinking water safety and human health.

[0003] For example, the authorization announcement number is CN112759181B, the authorization announcement date is 2022.11.22, and the name is a new type of internal source treatment method for black and smelly river water, including: a water surface suspended matter cleaning system, a water bottom sediment pollution removal system and water quality improvement measures. For the inner lake pollution of river and lake water bodies, treatment is carried out from three levels: the water surface, the bottom sediment and the water body itself. For suspended matter, algae, oil pollution, etc. on the surface of the water body, the pollutants are floated to the surface by adding floating coagulants, and then the surface pollutants are collected and pumped to the micro-nano bubble flotation equipment for treatment through the water surface slag machine, and the clean water is returned to the water body, and the pollutants are transferred and disposed of. For the bottom sediment, it is treated by sediment elution technology to wash away the light and organic colloidal pollutants in the sediment...;

[0004] Traditional sediment treatment methods mainly include physical dredging, chemical solidification and landfill. Although these methods can remove pollutants in the short term, they often have the following problems:

[0005] Environmental impact: Physical dredging may disturb the ecological environment and cause secondary pollution.

[0006] High cost: The cost of desilting and transporting contaminated sludge is usually high.

[0007] Irreversibility: Certain chemical solidification methods may cause changes in the morphology of pollutants in the sediment, making it difficult to restore their original ecological functions. Summary of the invention

[0008] 1. Purpose of the invention

[0009] In view of this, the purpose of the present invention is to propose an in-situ ecological treatment method for river and lake sediment pollutants, through which river and lake sediments can be intervened and treated for a long time, the intervention cost is low, secondary pollution is not easily generated, and the effect is excellent.

[0010] (II) Technical solution

[0011] In order to achieve the above technical objectives, the present invention provides an in-situ ecological treatment method for river and lake sediment pollutants, which comprises the following steps:

[0012] Step 1: Zoning

[0013] Construct river-lake isolation barriers to divide the bottom of rivers and lakes into several sediment pollution control units;

[0014] Step 2: Brucella control

[0015] A bacterial pipe network is laid in the sediment pollution control unit, microbial degradation colonies are added into the sediment pollution control unit through the bacterial pipe network, and a submerged plant blanket is laid on the upper layer of the sediment pollution control unit.

[0016] As a further description of the above technical solution: the river and lake isolation fence includes: main piles and isolation nets, wherein a card slot is opened on the surface of the main piles, wherein the card slot is opened in the vertical direction, and isolation net clips corresponding to the card slots are respectively installed at both ends of the isolation net. When the isolation net is installed, the isolation net clips at both ends of the isolation net are respectively inserted and engaged in the card slots on the corresponding sides of the two main piles from top to bottom, and the isolation net adopts a mesh structure.

[0017] As a further description of the above technical solution: the isolation net card adopts a T-shaped structure, so that the isolation net card will not be pulled out after being engaged in the card slot, and the top of the main pile is installed with a card stopper by threaded insertion or screwing. The card stopper can ensure that the isolation net card will not abnormally fall out from the top of the card slot, thereby ensuring the stability of the entire structure.

[0018] As a further description of the above technical solution: the river and lake isolation fence also includes auxiliary piles, wherein a plurality of locking holes are equidistantly provided on the auxiliary piles in the vertical direction.

[0019] As a further description of the above technical solution: the construction method of the river-lake isolation fence is as follows:

[0020] Main pile sinking: Based on the area of ​​rivers and lakes, main pile sinking operations are carried out at preset corresponding positions at the bottom of rivers and lakes according to the designed dimensions. The main pile positions of the sinking piles are located at the top corners of each sediment pollution control unit. The area enclosed by four main piles is a sediment pollution control unit. Specifically, the sinking depth is determined by the thickness of the bottom sediment of rivers and lakes. In order to ensure the stability of the main piles, the pile foundation depth of the main piles is at least 1 / 3 of the total length of the main piles, that is, the length from the bottom of the main pile to the bottom of the sediment layer at the bottom of the river and lake is at least 1 / 3 of the total length of the main pile, and the distance from the top of the main pile to the top of the sediment layer is at least 20 cm, so as to ensure the subsequent deployment of the isolation net;

[0021] Auxiliary pile sinking: Taking the main pile position as the reference, multiple auxiliary piles are sunk between two adjacent main pile positions at equal intervals;

[0022] Installation of isolation net: Insert the isolation net around the main piles and secondary piles to form a frame-shaped grid isolation net.

[0023] As a further description of the above technical solution: the specific method of installing the isolation net is as follows:

[0024] Unscrew the stopper on the top of the main pile;

[0025] After the isolation net is passed through each secondary pile in a staggered manner, the isolation net clamps at both ends of the isolation net are respectively inserted from top to bottom along the clamping slots on the two main piles on the same side;

[0026] Sink the isolation net into the bottom mud layer to a preset depth by pressing down, and screw in the installation clamp stopper;

[0027] Insert the bayonet pin into the locking hole on each auxiliary pile, and expose one end of the bayonet pin to be inserted into the mesh hole on the isolation net, so that the height of the isolation net is fixed, and the overall installation of the isolation net is completed.

[0028] As a further description of the above technical solution: the bacteria pipe network adopts a horizontal multi-section continuous U-shaped structure, and the surface of the bacteria pipe network is provided with a dense pore structure for microorganisms to seep out, wherein the two ends of the bacteria pipe network are respectively bent upward and extend at least to the upper position of the submerged plant blanket, and the two ends of the bacteria pipe network are provided with a first joint, and a branch pipe is provided at the side position of the first joint at both ends of the bacteria pipe network, and a second joint is installed at the end of the branch pipe, and a valve that can control the conduction or closing of the second joint is installed on the second joint, and a cover body is screwed on the first joint and the second joint.

[0029] As a further description of the above technical solution: the method for laying out the bacteria pipe network in step 2 is as follows:

[0030] Sink the bacteria pipe network into the sediment pollution control unit. After sinking to a preset depth, fix both ends of the bacteria pipe network to the main piles by ropes, wires or bolts. The sinking depth is less than the bottom depth of the isolation fence to prevent the bacteria pipe network from continuing to sink and affecting the subsequent microbial control effect.

[0031] As a further description of the above technical solution: the method of injecting microorganisms into the bacterial distribution pipe network in step 2 to degrade the bacterial colonies is as follows:

[0032] The covers on the first joints at the two ends of the bacterial colony pipe network are rotated and removed, a punching device is connected to one of the first joints, and the cover on the second joint at the same end of the first joint is rotated and removed, and a colony storage device is connected;

[0033] The punching device is started to punch the inside of the bacteria pipe network, so that the bottom mud in the bacteria pipe network is discharged from the other end pipe opening. After it is completely discharged, the first joint at the other end of the bacteria pipe network is closed by rotating the cover body. At this time, only a small amount of water and bottom mud will penetrate into the bacteria pipe network through the surface pores;

[0034] Open the valve to allow the microbial degradation colonies and culture medium in the colony storage device to be poured into the bacteria distribution pipe network, close the valve, and screw all the covers together to complete the injection of the microbial degradation colonies.

[0035] As a further description of the above technical solution: the edge of the submerged plant blanket is fixedly connected with a plurality of pins at equal intervals by connecting ropes, and the diameter of the pins is smaller than the diameter of the locking holes on the auxiliary piles;

[0036] The specific method of laying a submerged plant blanket on the upper layer of the sediment pollution control unit in step 2 is as follows:

[0037] Laying a preset submerged plant blanket on top of the bottom mud layer in the bottom mud pollution control unit;

[0038] Each pin at the edge of the submerged plant blanket is passed through the locking hole at the closest height on the nearest secondary pile to fix the pin to the edge of the submerged plant blanket.

[0039] In the above technical scheme, the present invention provides an in-situ ecological treatment method for river and lake sediment pollutants. The method sets up independently separated sediment pollution treatment units at the bottom of rivers and lakes, and lays a bacterial pipe network based on these sediment pollution treatment units, so that the bacterial pipe network can sink into the sediment. Therefore, the microbial degradation colonies in the bacterial pipe network can directly enter the sediment through the bacterial pipe network, and perform microbial decomposition and / or degradation on the sediment, which can greatly reduce the direct impact of water on microorganisms and improve the treatment effect of the sediment. In addition, by setting up independent sediment pollution treatment units, the fluidity of the sediment can be reduced, so that when studying the treatment effect of microorganisms on the sediment in the later stage, the sediment in multiple sediment pollution treatment units can be independently sampled, tested and compared, which provides convenience for subsequent research. Secondly, the submerged plant blanket set on the top of the sediment pollution treatment unit can effectively assist the submerged plants to quickly take root and reproduce, providing effective in-situ ecological treatment for the sediment.

[0040] In this treatment method, the overall operation is convenient and quick through the reasonable design of the device structure in each sediment pollution treatment unit, and the bacterial distribution pipe network can be injected with microbial degradation colonies for the second time, which provides convenience for subsequent secondary intervention, and the corresponding type of microbial degradation colonies can be used according to the actual sediment cost. Therefore, this method can be used to intervene in the sediment of rivers and lakes for a long time, with low intervention cost, less secondary pollution and excellent effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the structure of a plurality of sediment pollution control units combined in an in-situ ecological control method for river and lake sediment pollutants provided by the present invention;

[0043] Figure 2 A schematic diagram of the structure of a single sediment pollution control unit in an in-situ ecological control method for river and lake sediment pollutants provided by the present invention;

[0044] Figure 3 A bottom view of a single sediment pollution control unit in an in-situ ecological control method for river and lake sediment pollutants provided by the present invention;

[0045] Figure 4 A schematic diagram of the isolation net structure in an in-situ ecological treatment method for river and lake sediment pollutants provided by the present invention;

[0046] Figure 5 A schematic diagram of the main pile structure in an in-situ ecological treatment method for river and lake sediment pollutants provided by the present invention;

[0047] Figure 6 A schematic diagram of the structure after the clamping block head above the main pile is dismantled in the in-situ ecological treatment method for river and lake sediment pollutants provided by the present invention;

[0048] Figure 7 A schematic diagram of the auxiliary pile structure in an in-situ ecological treatment method for river and lake sediment pollutants provided by the present invention;

[0049] Figure 8 A schematic diagram of the structure of a submerged plant blanket in an in-situ ecological treatment method for river and lake sediment pollutants provided by the present invention;

[0050] Fig. 9 A schematic diagram of the structure of a bacterial pipe network in an in-situ ecological treatment method for river and lake sediment pollutants provided by the present invention;

[0051] Fig.10 The invention provides an in-situ ecological treatment method for river and lake sediment pollutants. Fig. 9 Schematic diagram of the enlarged structure of area A in the middle.

[0052] Description of the drawings: 1. Main pile; 101. Card slot; 102. Card stopper; 2. Auxiliary pile; 201. Locking hole; 3. Isolation net; 301. Isolation net card; 4. Submerged plant blanket; 401. Connecting rope; 402. Pin body; 5. Bacteria distribution pipe network; 501. First joint; 502. Cover body; 503. Branch pipe; 504. Second joint; 505. Valve; 6. Bottom sediment pollution control unit. DETAILED DESCRIPTION

[0053] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0054] Reference Figure 1-10 :This embodiment provides a technical solution: an in-situ ecological treatment method for river and lake sediment pollutants, comprising the following steps:

[0055] Step 1: Zoning

[0056] Build river-lake isolation barriers to divide the bottom of rivers and lakes into several sediment pollution control units6;

[0057] Step 2: Brucella control

[0058] A bacterial pipe network 5 is arranged in the sediment pollution control unit 6, microbial degradation colonies are added into the sediment pollution control unit 6 through the bacterial pipe network 5, and a submerged plant blanket 4 is laid on the upper layer of the sediment pollution control unit 6. The method sets up independent sediment pollution control units 6 at the bottom of rivers and lakes, and arranges bacterial pipe networks 5 based on these sediment pollution control units 6, so that the bacterial pipe networks 5 can sink into the sediment, so that the microbial degradation colonies in the bacterial pipe network 5 can directly enter the sediment through the bacterial pipe network 5, and microbial degradation of the sediment is carried out. The decomposition and / or degradation of substances can greatly reduce the direct impact of water on microorganisms and improve the treatment effect of sediment. In addition, by setting up an independent sediment pollution control unit 6, the fluidity of the sediment can be reduced, so that when studying the treatment effect of microorganisms on the sediment in the later stage, the sediment in multiple sediment pollution control units 6 can be independently sampled, tested and compared, which provides convenience for subsequent research. Furthermore, the submerged plant blanket 4 set on the top of the sediment pollution control unit 6 can effectively assist the submerged plants to take root and reproduce quickly, providing effective in-situ ecological management for the sediment.

[0059] It should be noted that the commonly used bacterial colonies in sediment treatment mainly include the following types of microorganisms, which have strong organic matter degradation ability and sewage treatment performance:

[0060] Aerobic bacteria: Nitrifying bacteria: such as nitrite oxidizing bacteria (Nitrosomonas) and nitrate oxidizing bacteria (Nitrobacter), which can convert ammonia nitrogen into nitrate under aerobic conditions.

[0061] Acid-producing bacteria: such as lactic acid bacteria, can produce acidic substances by fermenting organic matter, which helps the subsequent sedimentation of sediment.

[0062] Anaerobic bacteria:

[0063] Methanogens: Such as Methanobacterium, which can decompose organic matter and produce methane under anaerobic conditions and are often used in anaerobic digestion processes.

[0064] Decay bacteria: such as actinomycetes (Actinobacteria) and some anaerobic bacteria, can degrade complex organic matter in the sediment.

[0065] Actinomycetes:

[0066] It has strong degradation ability and can decompose a variety of organic pollutants. It is often used in the biodegradation and improvement of sediment.

[0067] Yeast:

[0068] For example, some yeasts can use organic matter for fermentation, thereby reducing the volume of sediment and improving its properties.

[0069] In one embodiment, the river and lake isolation fence includes: a main pile 1 and an isolation net 3, wherein a card slot 101 is opened on the surface of the main pile 1, wherein the card slot 101 is opened in the vertical direction, and isolation net clips 301 corresponding to the card slot 101 are respectively installed at both ends of the isolation net 3. When the isolation net 3 is installed, the isolation net clips 301 at both ends of the isolation net 3 are respectively inserted and engaged in the card slots 101 on the corresponding sides of the two main piles 1 from top to bottom, and the isolation net 3 adopts a mesh structure.

[0070] In one embodiment, the isolation net card component 301 adopts a T-shaped structure, so that the isolation net card component 301 will not be pulled out after being engaged in the card slot 101, and the top of the main pile 1 is installed with a card stopper 102 by threaded insertion or screwing. The card stopper 102 can ensure that the isolation net card component 301 will not abnormally fall out from the top of the card slot 101, thereby ensuring the stability of the entire structure.

[0071] In one embodiment, the river-lake isolation fence further includes a secondary pile 2, wherein a plurality of locking holes 201 are equidistantly provided on the secondary pile 2 in the vertical direction.

[0072] Specifically, the construction method of the river-lake isolation fence is as follows:

[0073] Main pile 1 sinking: based on the area of ​​rivers and lakes, main pile 1 sinking operation is carried out at the corresponding preset position at the bottom of rivers and lakes according to the design size. The main pile 1 of the sinking is located at the top corner of each sediment pollution control unit 6 respectively. The area enclosed by four main piles 1 is a sediment pollution control unit 6. Specifically, the sinking depth is determined by the thickness of the bottom sediment of rivers and lakes. In order to ensure the stability of the main pile 1, the pile foundation depth of the main pile 1 is at least 1 / 3 of the total length of the main pile 1, that is, the length from the bottom of the main pile 1 to the bottom of the sediment layer at the bottom of the river and lake is at least 1 / 3 of the total length of the main pile 1, and the distance from the top of the main pile 1 to the top of the sediment layer is at least 20 cm, so as to ensure the subsequent arrangement of the isolation net 3;

[0074] Sinking of secondary piles 2: Taking the position of the main pile 1 as a reference, multiple secondary piles 2 are sunk between the positions of two adjacent main piles 1 at equal intervals. Specifically, the sinking depth of the secondary piles 2 is determined by the thickness of the bottom mud of the river and lake. In order to ensure the stability of the secondary piles 2, the pile foundation depth of the secondary piles 2 is at least 1 / 4 of the total length of the secondary piles 2, that is, the length from the bottom of the secondary pile 2 to the bottom of the bottom mud layer of the river and lake is at least 1 / 4 of the total length of the secondary piles 2, and the distance from the top of the main pile 1 to the top of the bottom mud layer is at least 15 cm, so as to ensure the subsequent layout of the isolation net 3;

[0075] Installation of the isolation net 3: insert the isolation net 3 around the main pile 1 and the auxiliary pile 2 to form a frame-shaped grid isolation net 3.

[0076] In one embodiment, the specific method of installing the isolation net 3 is as follows:

[0077] Unscrew the clamp stopper 102 on the top of the main pile 1;

[0078] After the isolation net 3 is passed through each secondary pile 2 in a staggered manner, the isolation net clamps 301 at both ends of the isolation net 3 are respectively inserted from top to bottom along the clamping slots 101 on the two main piles 1 on the same side;

[0079] The isolation net 3 is sunk into the bottom mud layer to a preset depth by pressing downward, and the mounting clamp stopper 102 is screwed in place;

[0080] Insert the locking pin into the locking hole 201 on each auxiliary pile 2, and make one end of the locking pin exposed and inserted into the mesh of the isolation net 3, so that the position height of the isolation net 3 is fixed, and the overall installation of the isolation net 3 is completed. Specifically, in order to ensure the fixing effect of the isolation fence on the bottom mud, thereby ensuring the subsequent microbial degradation effect, the sinking depth of the isolation fence is required as follows: when the depth of the bottom mud layer is less than 20cm, the depth of the isolation net 3 sunk into the bottom mud layer is consistent with the depth of the bottom mud layer; when the depth of the bottom mud layer is greater than 20cm, the depth of the isolation net 3 sunk into the bottom mud layer is consistent with the depth of the bottom mud layer. The layer depth is at least 20cm. Specifically, in order to facilitate the installation of the isolation net 3, the isolation net 3 itself has a certain hardness. As a further description of the above technical solution: a stainless steel mesh is used, and the length of the isolation net card 301 is less than the height of the isolation net 3, so that the bottom of the isolation net 3 is lower than the bottom of the isolation net card 301. Therefore, when the isolation net 3 is installed, it can be dislocated and passed through each sub-pile 2 first, and then the isolation net card 301 can be installed. This ensures that the engagement of the isolation net card 301 and the detour of the isolation net 3 do not need to be carried out at the same time, which is convenient for installation.

[0081] In one embodiment, the bacteria pipe network 5 adopts a horizontal multi-section continuous U-shaped structure, and the surface of the bacteria pipe network 5 is provided with a dense pore structure for microorganisms to seep out, wherein the two ends of the bacteria pipe network 5 are respectively bent upward and extend at least to the upper position of the submerged plant blanket 4, and the two ends of the bacteria pipe network 5 are provided with a first joint 501, and a branch pipe 503 is provided at the side position of the first joint 501 at both ends of the bacteria pipe network 5, and a second joint 504 is installed at the end of the branch pipe 503, and a valve 505 that can control the conduction or closing of the second joint 504 is installed on the second joint 504, and a cover body 502 is screwed on the first joint 501 and the second joint 504.

[0082] In one embodiment, the method for laying out the bacteria pipe network 5 in step 2 is as follows:

[0083] The bacteria pipe network 5 is sunk into the bottom mud pollution control unit 6. After sinking to a preset depth, the two ends of the bacteria pipe network 5 are fixed to the main pile 1 by ropes, wires or bolts. The sinking depth is less than the bottom depth of the isolation fence to prevent the bacteria pipe network 5 from continuing to sink and affecting the subsequent microbial control effect.

[0084] In one embodiment, the method of injecting microorganisms into the bacterial distribution pipe network 5 in step 2 is as follows:

[0085] The covers 502 on the first joints 501 at the two ends of the bacterial colony pipe network 5 are rotated and removed, a punching device is connected to one of the first joints 501, and the cover 502 on the second joint 504 at the same end of the first joint 501 is rotated and removed, and a colony storage device is connected;

[0086] The punching device is started to punch the inside of the tube network 5, so that the bottom mud in the tube network 5 is discharged from the other end of the tube. After it is completely discharged, the first joint 501 at the other end of the tube network 5 is closed by rotating the cover body 502. At this time, only a small amount of water and bottom mud will penetrate into the tube network 5 through the surface pores.

[0087] Open the valve 505 to allow the microbial degradation colonies and culture medium in the colony storage device to be poured into the bacteria dispensing pipe network 5, close the valve 505, and at the same time, all the covers 502 are screwed together to complete the injection of the microbial degradation colonies.

[0088] In one embodiment, the edge of the submerged plant blanket 4 is fixedly connected with a plurality of pins 402 at equal intervals through a connecting rope 401, and the diameter of the pins 402 is smaller than the diameter of the locking holes 201 on the secondary pile 2;

[0089] The specific method of laying the submerged plant blanket 4 on the upper layer of the sediment pollution control unit 6 in step 2 is as follows:

[0090] Laying a preset submerged plant blanket 4 above the bottom mud layer in the bottom mud pollution control unit 6;

[0091] The pins 402 at the edge of the submerged plant blanket 4 are passed through the locking holes 201 closest to the height on the nearest secondary pile 2 to fix the pins 402 to the edge of the submerged plant blanket 4. Specifically, the connecting rope 401 is elastic, so that the pins 402 can be stuck in the locking holes 201 after passing through the locking holes 201, and are not prone to falling off abnormally, and are convenient and quick to disassemble and install.

[0092] It should be noted that the application of submerged plant blanket technology has been more widespread in recent years. It uses natural plant fibers to weave a porous mesh structure suitable for biological film formation, which helps submerged plants to take root and reproduce quickly. It is most effective in rivers with poor substrate conditions.

[0093] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. An in-situ ecological treatment method for river and lake sediment pollutants, characterized in that: It includes the following steps: Step 1: Zoning Construct river-lake isolation barriers to divide the bottom of rivers and lakes into several sediment pollution control units (6); Step 2: Brucella control Laying a bacterial tube network (5) in the sediment pollution control unit (6) so that the bacterial tube network (5) can sink into the sediment, adding microbial degradation colonies into the sediment pollution control unit (6) through the bacterial tube network (5), and laying a submerged plant blanket (4) on the upper layer of the sediment pollution control unit (6); The river and lake isolation fence comprises: a main pile (1) and an isolation net (3), wherein a card slot (101) is provided on the surface of the main pile (1), wherein the card slot (101) is provided in a vertical direction, and isolation net card parts (301) corresponding to and matching the card slot (101) are respectively installed at both ends of the isolation net (3), and the isolation net card parts (301) adopt a T-shaped structure, and the length of the isolation net card parts (301) is less than the height of the isolation net (3), so that the bottom of the isolation net (3) is lower than the bottom of the isolation net card parts (301), and a card part stopper (102) is installed on the top of the main pile (1) by screwing or screwing, and the river and lake isolation fence also comprises a secondary pile (2), and a plurality of locking holes (201) are equidistantly provided on the secondary pile (2) in a vertical direction; The construction method of the river-lake isolation fence is as follows: Main pile (1) sinking: based on the area of ​​the river or lake, the main pile (1) is sunk at a preset corresponding position at the bottom of the river or lake according to the design size, the main pile (1) is located at the top corner position of each bottom sediment pollution control unit (6), and the area enclosed by four main piles (1) is a bottom sediment pollution control unit (6); Sinking of auxiliary piles (2): taking the position of the main piles (1) as a reference, a plurality of auxiliary piles (2) are sunk between the positions of two adjacent main piles (1) at equal intervals; Installation of the isolation net (3): inserting the isolation net (3) around the main pile (1) and the auxiliary pile (2) to form a frame-shaped grid isolation net (3); The specific method of installing the isolation net (3) is as follows: Unscrew the clamp stopper (102) on the top of the main pile (1); After the isolation net (3) is passed through each auxiliary pile (2) in a staggered manner, the isolation net clamps (301) at both ends of the isolation net (3) are respectively inserted from top to bottom along the clamping slots (101) on the two main piles (1) on the same side; The isolation net (3) is sunk into the bottom mud layer to a preset depth by pressing downward, and the mounting clamp stopper (102) is screwed in place; A locking pin is inserted into the locking hole (201) on each auxiliary pile (2), and one end of the locking pin is exposed and inserted into the mesh of the isolation net (3), so that the position height of the isolation net (3) is fixed, and the overall installation of the isolation net (3) is completed.

2. The in-situ ecological treatment method for river and lake sediment pollutants according to claim 1 is characterized in that: The bacterium pipe network (5) adopts a horizontal multi-section continuous U-shaped structure, and the surface of the bacterium pipe network (5) is provided with a dense pore structure for microorganisms to seep out, wherein the two ends of the bacterium pipe network (5) are respectively bent upwards and extend at least to the upper layer of the submerged plant blanket (4), and the two ends of the bacterium pipe network (5) are provided with a first joint (501), and a branch pipe (503) is provided at the two ends of the bacterium pipe network (5) at the side position of the first joint (501), and the end of the branch pipe (503) is installed with a second joint (504), and the second joint (504) is installed with a valve (505) that can control the conduction or closing of the second joint (504), and the first joint (501) and the second joint (504) are both screwed and installed with a cover body (502).

3. The in-situ ecological treatment method for river and lake sediment pollutants according to claim 2 is characterized in that: The method for laying out the bacteria distribution pipe network (5) in step 2 is as follows: The bacteria pipe network (5) is sunk into the bottom mud pollution control unit (6). After being sunk to a preset depth, both ends of the bacteria pipe network (5) are fixed to the main pile (1) by ropes, wires or bolts, wherein the sunk depth is less than the bottom depth of the isolation fence.

4. The in-situ ecological treatment method for river and lake sediment pollutants according to claim 3 is characterized in that: The method of injecting microorganisms into the bacterial distribution pipe network (5) in step 2 is as follows: The covers (502) on the first joints (501) at the two ends of the bacterial colony pipe network (5) are rotated and removed, a punching device is connected to one of the first joints (501), and the cover (502) on the second joint (504) at the same end of the first joint (501) is rotated and removed, and a bacterial colony storage device is connected; The punching device is started to punch the inside of the bacteria pipe network (5) so that the bottom mud in the bacteria pipe network (5) is discharged from the other end pipe opening. After the bottom mud is completely discharged, the first joint (501) at the other end of the bacteria pipe network (5) is rotated and closed by the cover body (502). At this time, only a small amount of water and bottom mud will penetrate into the bacteria pipe network (5) through the surface pores; The valve (505) is opened to allow the microbial degradation colonies and culture medium in the colony storage device to be poured into the bacterial distribution pipe network (5), and the valve (505) is closed. At the same time, all the covers (502) are screwed together to complete the injection of the microbial degradation colonies.

5. The in-situ ecological treatment method for river and lake sediment pollutants according to claim 4 is characterized in that: The edge of the submerged plant blanket (4) is fixedly connected to a plurality of pins (402) at equal intervals via a connecting rope (401), and the diameter of the pins (402) is smaller than the diameter of the locking holes (201) on the auxiliary pile (2); The specific method of laying the submerged plant blanket (4) on the upper layer of the sediment pollution control unit (6) in step 2 is as follows: Laying a preset submerged plant blanket (4) above the bottom mud layer in the bottom mud pollution control unit (6); Each pin body (402) at the edge of the submerged plant blanket (4) is passed through the locking hole (201) at the closest height on the nearest secondary pile (2) to fix the pin body (402) to the edge of the submerged plant blanket (4).

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