CN116730511A - A method for in-situ treatment of black and odorous water bodies - Google Patents

Abstract

The application relates to a method for in-situ treatment of black and odorous water body, which belongs to the technical field of in-situ treatment of water body, and comprises the steps of dredging a riverbed, combining a micro-nano aeration device with an indigenous flora activation technology, repairing the black and odorous water body, injecting a calcium nitrate solution with the mass of 1.2% of that of the substrate sludge into the substrate sludge, continuously stirring for 20 minutes, decomposing organic pollutants into carbon dioxide and nitrogen, simultaneously degrading the organic matters and sulfides, sequentially adding denitrifying bacteria and biological growth promoters into the substrate sludge, combining a micro-nano aeration device to increase dissolved oxygen in the water body, eliminating the organic pollutants in the black and odorous water body, and increasing the activity of indigenous flora.

Description

A method for in-situ treatment of black and odorous water bodies

Technical field

The present invention relates to the technical field of water treatment, and in particular, to a method for in-situ treatment of black and odorous water bodies.

Background technique

With the acceleration of urbanization and industrialization, many urban rivers have become sewage discharge channels. Due to excessive sewage loading, the dissolved oxygen content of the rivers is lower than 0.5 mg/L, the COD content is high, and the nitrogen content is high, gradually forming black and smelly water bodies. The fundamental cause of the black and odor phenomenon is a biochemical reaction phenomenon. The organic matter content in the water body is high, and the oxygen consumption rate is significantly greater than the reoxygenation rate, making the anoxic phenomenon in the water body more and more obvious, so that anaerobic microorganisms multiply in large numbers, and Anaerobic microorganisms in the water body will produce odorous pollutants such as hydrogen sulfide, methane or ammonia during decomposition. Over time, the water body will become black and smelly.

Black and smelly water bodies cause harm to human living environment and health, and affect the appearance of the city. Remediation of black and smelly water bodies has become an important part of people's work to improve the urban living environment. The causes of black and odorous water bodies are complex. Although the black and odorous water body can be eliminated in a short period of time, because the sediment will continue to pollute the overlying water body, the water quality may turn black and smelly again after treatment. Therefore, studying a long-term effective technology and model is a necessary method to treat black and odorous water bodies and maintain its long-term effectiveness. The existing single restoration technology cannot comprehensively restore water bodies, and it is difficult to achieve the purpose of ecological restoration. At present, the treatment methods for black and odorous water bodies include source control and pollution interception, endogenous treatment, ecological restoration, and living water quality preservation. The implementation of source control and pollution interception projects is difficult and long-term, and the one-time investment is large. Only relying on indigenous flora for treatment will make the treatment difficult. The cycle is long, the effect is slow, and the cost of adding foreign bacteria is high, making it difficult to achieve the purpose of treating black and smelly water bodies.

Contents of the invention

The invention overcomes the shortcomings of the prior art and provides a method for in-situ treatment of black and odorous water bodies.

In order to achieve the above objects, the technical solutions adopted by the present invention are:

The invention provides a method for in-situ treatment of black and odorous water bodies. The method includes:

Use dredging tools to remove accumulated silt from river beds and lakes, and remove endogenous pollutants that cause black and odorous water bodies;

Several micro-nano aeration devices are installed along the river bank and lake bank to be treated. The micro-nano aeration devices are equipped with pipelines leading to rivers and lakes. The sediment is aerated through the micro-nano aeration devices and the pipelines. Qi function;

Before aeration by the micro-nano aeration device, inject calcium nitrate solution into the sediment, stir thoroughly, and then add denitrifying bacteria and biological growth promoters to the sediment in sequence, combined with the micro-nano The aeration effect of the aeration device increases the dissolved oxygen in the water body and increases the activity of indigenous bacterial flora.

Further, in a preferred embodiment of the present invention, the dredging tool adopts an environmentally friendly cutter suction dredger. The environmentally friendly cutter suction dredger is equipped with an environmentally friendly reamer, a mud pump and a mud conveying pipeline. The depth of siltation is 0.5 to 1.5 meters.

Furthermore, in a preferred embodiment of the present invention, a high-speed shearing device is installed in the micro-nano aeration device, and the high-speed shearing device chops the bubbles in the gas-liquid mixture to tens of nanometers to tens of nanometers. microns to form micro-nano bubbles, the high-speed shearing device is equipped with a speed sensor, and the micro-nano aeration device is equipped with a gas sensor.

Further, in a preferred embodiment of the present invention, when the micro-nano aeration device is installed on the lakeshore to be treated, the pipelines are installed in the east-west, north-south, southeast, southwest, northeast and northwest directions of the lakeshore, so The pipeline outlet gradually approaches the middle of the lake. The pipeline outlet near the east and south sides of the lake bank to be treated sprays bubbles upward, and the pipeline outlet near the west and north sides sprays bubbles downward.

Furthermore, in a preferred embodiment of the present invention, when the micro-nano aeration device is installed on the river bank to be treated, the pipes are arranged on both sides of the river, and the pipe outlet is along the river width direction. , the pipe outlet on the left bank of the river to be treated sprays bubbles upward, and the pipe on the right bank sprays bubbles downward.

Furthermore, in a preferred embodiment of the present invention, the pipelines maintain a certain interval, and the interval is 10 to 20m. The pipelines are equipped with turbidity sensors, and the two adjacent micro-nano aeration devices are equipped with turbidity sensors. The interval is 20~100m.

Further, in a preferred embodiment of the present invention, the micro-nano aeration device adopts an intermittent aeration mode, the air intake volume of the micro-nano bubbles is 0.5L/min, and the bubble diameter of the micro-nano bubbles is 0.5L/min. is 15μm.

Further, in a preferred embodiment of the present invention, the dosage of the calcium nitrate is 1.2% of the sediment mass, and the added calcium nitrate is evenly injected into the sediment in a continuous spraying manner, so The sufficient stirring time is 20 minutes, the aeration volume is 0.05~ ^0.1m3 /h, the calcium nitrate is added at the frequency of 30 days, 60 days, and 90 days for the first three times, and once every 3 months thereafter. .

Further, in a preferred embodiment of the present invention, the components of the biological growth-promoting agent are organic acids, biological enzymes, buffers, vitamins and purines, and the dosage of the biological growth-promoting agent is 0.1 mL/L, Add once every 45 days, and the dosage of the denitrifying bacteria is 0.25g/m ³ to 0.5 g/m ³ . The first three times of the denitrifying bacteria are added at the frequency of 30 days, 60 days, and 90 days. , then add it every 3 months.

On the other hand, the present invention provides a method for in-situ treatment of black and odorous water bodies, which includes the following steps:

Turbidity sensors detect the turbidity of water and obtain turbidity information;

The turbidity information is compared with the preset turbidity information to obtain a deviation threshold;

Determine whether the deviation threshold is greater than the preset deviation threshold. If it is greater, the micro-nano aeration device is controlled to continue aeration. If it is less than the micro-nano aeration device, the micro-nano aeration device is automatically closed.

The beneficial technical effects of the present invention are:

The environmentally friendly cutter suction dredger is used to remove the silt accumulated in the river bed, so that the endogenous substances that cause the black and smelly riverbed water are completely removed, and the purpose of keeping the water body clean is prioritized. The dredging efficiency of the environmentally friendly cutter suction dredger is high and it is easy to operate. Environmentally friendly, it is the first choice tool for dredging. Then, bioremediation of the sediment is carried out. Calcium nitrate is added to the water body and stirred thoroughly, which can decompose the organic pollutants into carbon dioxide and nitrogen. Then, denitrification bacteria and biological promoters are added. Biological agents are used to promote the reproduction and growth of indigenous microorganisms, enhance the ability of microorganisms to degrade pollutants, and combine with micro-nano aeration devices to increase dissolved oxygen in the water body, increase the activity of indigenous bacterial flora, and improve activation efficiency. This method is effective for black and smelly water bodies. The treatment effect is obvious, with low investment, high degree of equipment automation and simple operation. It can not only repair the sediment and improve the black and smelly phenomenon of the water body, but also avoid secondary pollution of the overlying water body and restore the ecological self-purification ability of the water body. , economical and reasonable, and the method is feasible.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, drawings of other embodiments can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic distribution diagram of a lake micro-nano aeration device used for in-situ treatment of black and odorous water bodies;

Figure 2 is a schematic distribution diagram of a river micro-nano aeration device used for in-situ treatment of black and odorous water bodies;

Figure 3 is a control flow chart for in-situ treatment of black and odorous water bodies.

The reference symbols are explained as follows:

1. River bank; 2. Micro-nano aeration device; 3. Pipeline; 4. River channel; 5. Lake bank.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. These drawings are simplified schematic diagrams and only illustrate the basic principles of the present invention in a schematic manner. structure, therefore it only shows the structure related to the present invention. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other if there is no conflict.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and The simplified description does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the scope of the present application. Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and shall not be understood as indicating or implying the relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined by "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood through specific circumstances.

In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough understanding of the disclosure of the present invention will be provided.

The first aspect of the present invention provides a method for in-situ treatment of black and odorous water bodies. As shown in Figure 1, desilting tools are used to remove accumulated silt in river beds and lakes, and to remove endogenous pollutants that cause black and odorous water bodies; The dredging tool adopts an environmentally friendly cutter suction dredger. The environmentally friendly cutter suction dredger is equipped with an environmentally friendly reamer, a mud pump and a mud transport pipeline, and the dredging depth is 0.5 to 1.5 meters.

It should be noted that because there is a lot of silt in the black and smelly water bodies in lakes or river beds, these silts have been deposited for a long time, which increases the solid precipitation in the water body and is one of the endogenous pollutants that causes the black and smelly water body to be turbid. Therefore, it is necessary to clean up the water body. Silt is the primary task. The environmentally friendly cutter suction dredger used for dredging has a wide range of uses and has the advantages of low investment cost, high work efficiency and large output. It can avoid secondary pollution of the overlying water body by the sediment as much as possible, and utilize The environmentally friendly reamer head implements closed low-disturbance dredging. The excavated sludge is sucked in through the high-power mud pump on the dredger and enters the mud transportation pipeline. It is transported to the designated mud unloading area through the fully enclosed pipeline. The environmentally friendly reamer can clean the lake Or the stubborn silt in the river bed can be quickly removed. The dredging quality is remarkable, the power consumption is low, and it can meet certain economic and environmental protection requirements. It is simple to operate and easy to control. It is the first choice tool for dredging black and smelly water bodies. The dredging depth is selected from 0.5 to 1.5. Meters are most in line with the maximum depth specification limit of dredging. Generally, the development and utilization of river and lake water resources and the prevention and control of water damage require reasonable planning. The dredging depth must be demarcated based on the actual topography of the lake or river bed without destroying the water body ecology. It can keep the water ecology in a balanced state and make dredging more efficient.

As shown in Figures 1 and 2, several micro-nano aeration devices are set up along the river bank and lake bank to be treated. The micro-nano aeration devices are equipped with pipelines leading to the river and lake. Through the micro-nano aeration device and The pipeline aerates the sediment.

As shown in Figures 1 and 2, the micro-nano aeration device is equipped with a high-speed shearing device. The high-speed shearing device chops the bubbles in the gas-liquid mixture to tens of nanometers to tens of microns to form micro-nano aerators. Bubbles, the high-speed shearing device is equipped with a speed sensor, and the micro-nano aeration device is equipped with a gas sensor.

It should be noted that after the sludge is removed, the micro-nano aeration device is turned on to introduce aeration gas into the sediment in the water body through the pipe, and the high-speed shearing device chops the bubbles in the gas-liquid mixture to form micro-nano bubbles. , can quickly and efficiently convert bubbles into the required micro-nano bubbles, improve the quality and rate of micro-nano aeration, and is more suitable for the treatment of black and smelly water bodies. The small diameter and large number of micro-nano bubbles greatly increase the water content. , the effective contact area of gas, the dissolved oxygen efficiency of the water body is greatly improved; in addition, the particulate matter accumulated at the bottom of the river is adsorbed on the surface of the bubbles, and along with the flow of the river, the particulate matter in the river is purified, which is helpful to improve the transparency of the water body; in addition, micro-nano The aeration device can also improve the inorganic environment of the water body, promote the rapid reproduction of indigenous bacteria, and speed up the treatment of black and smelly water bodies.

It should be noted that when shearing ideal micro-nano bubbles, the shearing speed of the shearing device needs to be controlled, which is more conducive to the rapid formation of micro-nano bubbles. The speed sensor can detect the shearing speed in real time. After detecting the speed When the deviation value changes, the signal will be fed back to the output end of the shearing device to control its shearing speed, so that the generation rate and quality of micro-nano bubbles can be controlled more efficiently and conveniently. At the same time, when the micro-nano aeration device is aerated, the shearing speed will be controlled. The gas sensor detects the content of micro-nano bubbles injected into the water body in real time. The aeration volume and rate can be adjusted according to the water body treatment needs, so as to quickly increase the dissolved oxygen rate of the water body and complete the purification of harmful substances in the black and smelly water body faster. , to achieve overall intelligent control requirements.

As shown in Figures 1 and 2, when the micro-nano aeration device is installed on the lakeshore to be treated, the pipes are installed in the east-west, north-south, southeast, southwest, northeast and northwest directions of the lakeshore, and the pipe outlet gradually moves toward The middle of the lake is close to each other. The pipeline outlets near the east and south sides of the lakeshore to be treated spray bubbles upward, and the pipeline outlets near the west and north sides spray bubbles downward.

As shown in Figures 1 and 2, when the micro-nano aeration device is installed on the river bank to be treated, the pipes are arranged on both sides of the river, and the pipe outlet is along the river width direction. Among the river banks, the pipe outlet on the left bank sprays bubbles upward, and the pipe outlet on the right bank sprays bubbles downward.

It should be noted that since lakes and rivers have different basic structures, water flow patterns and water pollutant distributions, the aeration layout of micro-nano aeration devices should be reasonably installed and arranged based on the actual detected water object structure. Most lakes If it is a circular structure, the micro-nano aeration device needs to be installed in multiple directions around the lake shore. This installation layout can make the micro-nano bubbles fill the lake water to be treated to the greatest extent, and can effectively control the bottom of the black and smelly water body. The mud achieves a full range of aeration effects, ensuring that the dissolved oxygen in the treated water is at least greater than 2mg/L, and by moving the pipeline outlet closer to the center of the lake, the aeration gas becomes more concentrated, and the micro-nano bubbles are evenly distributed through the water flow. For each part of the sediment, this purpose can greatly increase the distribution density of gas in the sediment, so that the contact area between water and gas can be increased to a greater extent. By arranging the upper and lower ejection ports of bubbles in symmetrical directions, the flow of bubbles can be promoted. Increase the fluidity of water and improve the activity of water to a certain extent.

It should be noted that rivers are usually set up on both sides. The pipes are moved closer together along the width of the river so that the aeration gas is concentrated in the middle and both sides of the river bed, so that the micro-nano bubbles are evenly distributed throughout the river bed, greatly increasing the gas flow. The distribution density in the sediment and different bubble ejection directions on both sides of the bank can better promote the flow of bubbles, increase the fluidity of water to a certain extent, improve the activity of water, and achieve the ideal effect of dissolved oxygen in water bodies.

As shown in Figures 1 and 2, the pipelines maintain a certain interval, the interval is 10-20m, the pipelines are equipped with turbidity sensors, and the interval between two adjacent micro-nano aeration devices is 20-100m .

The micro-nano aeration device adopts an intermittent aeration mode, the air intake volume of the micro-nano bubbles is 0.5L/min, and the diameter of the micro-nano bubbles is 15 μm.

It should be noted that the distance between micro-nano aeration devices needs to be selected according to the length and width of the river and lake. The purpose is to achieve a good aeration effect. At the same time, the distance between the devices when operating should not be too close. , to avoid safety accidents and improve the safety factor. The pipeline spacing simulates the aeration spacing interval according to the sediment distribution in the lake or river bed, ensuring that the dissolved oxygen in the treated water body is at least greater than 2mg/L, improving the quality and rate of dissolved oxygen in the water, and aeration The turbidity of the water body can be detected in real time by the turbidity sensor before and after aeration. When the clarity of the water body changes, the turbidity sensor will detect the turbidity information and transmit the signal to the micro-nano aeration device to control its opening. Closed, it plays the role of water quality detection, and can intelligently control the microbial degradation of the water body sediment and the purification after micro-nano aeration. Compared with manual observation, the turbidity sensor can replace water quality problems that cannot be detected manually, and Achieve precise control of micro-nano aeration devices, reduce cost output and error rate, and be efficient and accurate.

It should be noted that the intermittent aeration mode specifically requires 5 hours of aeration per day. Too long or too short a time will lead to excessive aeration or excessive micro-nano gases in the water body, thereby reducing the dissolved oxygen efficiency of the water body and making it difficult to implement. Activation of indigenous flora and activated water activity cause negative optimization phenomena.

The dosage of calcium nitrate is 1.2% of the mass of the sediment. The calcium nitrate added is evenly injected into the sediment in a continuous spraying manner. The sufficient stirring time is 20 minutes, and the aeration amount is 0.05 ~0.1m ³ /h, the calcium nitrate is added at the frequency of 30 days, 60 days, and 90 days for the first three times, and once every 3 months thereafter.

It should be noted that during the action of calcium nitrate, microorganisms mainly use nitrate as an electron acceptor and organic carbon sources as electron donors. Through the oxidation of the electron donor, the organic pollutants are decomposed into carbon dioxide and nitrogen. At the same time, it can degrade organic matter and sulfide, so that the organic pollutants in the sediment and water body can be fully mixed with calcium nitrate through the set stirring time, so as to achieve the degradation of organic pollutants in the water body before the activation of indigenous bacteria, and at the same time, advance the investment Adding calcium nitrate helps activate the indigenous flora, promotes the growth of microorganisms, and achieves excellent purification effects in the in-situ treatment of black and odorous water bodies. The dosage and frequency of calcium nitrate should be based on the amount of sediment and actual water pollution. The situation should be controlled within a certain range to avoid excessive addition, which will lead to excessive calcium nitrate content in the water body, making it difficult for pollutants to be degraded and removed, thereby destroying the ecological quality balance of water bodies in lakes and rivers.

The components of the biological growth promoter are organic acids, biological enzymes, buffers, vitamins and purines. The dosage of the biological growth promoter is 0.1mL/L, and is added once every 45 days. The denitrifying bacteria have The dosage is 0.25g/m ³ to 0.5g/m ³ , and the denitrifying bacteria are added at the frequency of 30 days, 60 days, and 90 days for the first three times, and once every 3 months thereafter.

It should be noted that biological growth promoters can be used to increase the activity of indigenous microorganisms, which is conducive to the rapid enrichment of beneficial microorganisms, promotes the growth and reproduction of microorganisms, accelerates the decomposition of organic matter in wastewater by aerobic bacteria, and achieves the removal of black and smelly water sediments. With the microbial degradation function, the use of 0.1mL/L biological growth promoter can quickly increase the sediment activity and microbial concentration, achieve the purpose of efficiently repairing damaged sediment, and reduce the pollution caused to the overlying water body. Adding denitrification Bacteria agents use denitrifying bacteria to consume NO ₃ ^- for denitrification, effectively treat organic pollutants such as nitrates and nitrites in water bodies, remove easily biodegradable organic matter in sludge, and reduce the presence of black and odorous water bodies. Nitrogen content, while consuming nitrogen nutrients, inhibiting excessive reproduction of algae, inhibiting pathogenic bacteria, and purifying water bodies. In order to improve the treatment effect and save operating costs, the optimal dosage range of denitrifying bacteria is determined to be 0.25g/m ³ ~ 0.5g/m ³ , it can survive and carry out denitrification reactions under sufficient dissolved oxygen and anaerobic conditions, optimizing the physical and chemical environment of the water body sediment.

On the other hand, the present invention provides a method for in-situ treatment of black and odorous water bodies, as shown in Figure 3, including the following steps:

S102. The turbidity sensor detects the turbidity of the water body and obtains turbidity information;

S104. Compare the turbidity information with the preset turbidity information to obtain a deviation threshold;

S106. Determine whether the deviation threshold is greater than the preset deviation threshold. If it is greater, control the micro-nano aeration device to perform aeration. If it is less than the micro-nano aeration device, automatically close the micro-nano aeration device.

It should be noted that the turbidity sensor will detect the changing process of water turbidity in real time. The turbidity information includes one or more combinations of water turbidity, underwater visibility and suspended particulate matter content in the water. The turbidity information is fed back to the micro-nano sensor. Aeration device control system, the control system conducts multi-level comparative analysis of preset turbidity information and turbidity information. Since the turbidity information will change in positive and negative values during the water body treatment process, the control system will select the final The stable turbidity information is compared to generate a specific deviation threshold, and then the final control result is obtained by comparing with the preset deviation threshold. If it is greater than the preset deviation threshold, it means the water body is turbid, and the system automatically controls the micro-nano aeration device to bottom The mud is aerated. If it is smaller than the mud, there is no need to aerate. It realizes precise control of the automatic operation of the micro-nano aeration device, making the in-situ treatment of black and odorous water bodies more automated, improving the treatment efficiency, and largely satisfying the original requirements of black and odorous water bodies. job requirements for management.

In addition, a method for in-situ treatment of black and odorous water also includes the following steps:

During aeration, the high-speed shearing device receives the turbidity information, controls the speed sensor to detect the current speed change information, and establishes speed parameters;

The turbidity information automatically generates preset speed parameters through system analysis;

Compare the speed parameter with the preset speed parameter to obtain a difference;

By judging whether the difference is greater than or equal to the preset deviation value, if so, the speed of the high-speed shearing device does not meet the required shearing requirements of the bubbles, and the speed is adjusted again.

It should be noted that because the turbidity information includes the degree of turbidity of the water body, underwater visibility and the content of suspended particulate matter in the water body, it can intuitively reflect the treatment situation of the water body, thereby reflecting the size of the micro-nano bubbles required to aerate the sediment. The system The detected turbidity information is analyzed to calculate the target size information of micro-nano bubbles required for the sediment, thereby obtaining the required preset speed parameters. The speed sensor detects the shearing speed of the high-speed shearing device during current aeration. The system analyzes the speed parameters of the current operation. Since there is a certain deviation rate between the current shear speed and the preset speed parameters, the control system will optimize and compare the speed parameters with the preset speed parameters at this time to accurately determine the difference between the two. value. This difference reflects the difference between the current shearing speed and the required shearing speed. By comparing with the preset difference, the precise speed adjustment of the high-speed shearing device can be achieved. This shearing process is accurate to microns or nanometers. unit, so that the size of micro-nano bubbles generated by aeration meets the requirements of sediment treatment and improves the effect of in-situ treatment of black and odorous water bodies.

The above descriptions are based on the ideal embodiments of the present invention and are relatively specific and detailed, but this should not be construed as limiting the scope of the invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims (10)

1. A method for in-situ treatment of black and odorous water bodies, characterized by comprising the following steps: Use dredging tools to remove accumulated silt from river beds and lakes, and remove endogenous pollutants that cause black and odorous water bodies; Several micro-nano aeration devices are installed along the river bank and lake bank to be treated. The micro-nano aeration devices are equipped with pipelines leading to rivers and lakes. The sediment is aerated through the micro-nano aeration devices and the pipelines. Qi function; Before aeration by the micro-nano aeration device, inject calcium nitrate solution into the sediment, stir thoroughly, and then add denitrifying bacteria and biological growth promoters to the sediment in sequence, combined with the micro-nano The aeration effect of the aeration device increases the dissolved oxygen in the water body and increases the activity of indigenous bacterial flora. 2. A method for in-situ treatment of black and odorous water bodies according to claim 1, characterized in that the desilting tool adopts an environmentally friendly cutter suction dredger, and the environmentally friendly cutter suction dredger is provided with There are environmentally friendly reamers, mud pumps and mud pipelines, and the dredging depth is 0.5 to 1.5 meters. 3. A method for in-situ treatment of black and odorous water according to claim 1, characterized in that a high-speed shearing device is installed in the micro-nano aeration device, and the high-speed shearing device separates gas and liquid. The bubbles in the mixture are chopped to tens of nanometers to tens of microns to form micro-nano bubbles. The high-speed shearing device is equipped with a speed sensor, and the micro-nano aeration device is equipped with a gas sensor. 4. A method for in-situ treatment of black and odorous water bodies according to claim 1, characterized in that when the micro-nano aeration device is arranged on the lakeshore to be treated, the pipeline is arranged on the lakeshore. The pipeline outlet gradually approaches the middle of the lake in the east, west, north, south, southeast, southwest, northeast, and northwest directions. The pipeline outlet near the east and south sides of the lakeshore to be treated sprays bubbles upward, and bubbles are ejected upward near the west and north sides. The outlet of the pipe sprays bubbles downward. 5. A method for in-situ treatment of black and odorous water bodies according to claim 1, characterized in that when the micro-nano aeration device is installed on the river bank to be treated, the pipeline is arranged along the river. On both long sides of the river, the pipeline outlets are along the river width direction. Among the river banks to be treated, the pipeline outlets on the left bank eject bubbles upward, and the pipelines on the right bank eject bubbles downward. 6. A method for in-situ treatment of black and odorous water bodies according to claim 1, characterized in that the pipelines maintain a certain interval, the interval is 10-20m, and the pipelines are equipped with turbidity sensors , the distance between two adjacent micro-nano aeration devices is 20 to 100m. 7. A method for in-situ treatment of black and odorous water according to claim 1, characterized in that the micro-nano aeration device adopts an intermittent aeration mode, and the air intake amount of the micro-nano bubbles is 0.5L/min, and the diameter of the micro-nano bubbles is 15 μm. 8. A method for in-situ treatment of black and smelly water bodies according to claim 1, characterized in that the dosage of the calcium nitrate is 1.2% of the sediment quality, and the calcium nitrate added is Continuous spraying method is used to evenly inject into the bottom mud, the sufficient stirring time is 20 minutes, the aeration amount is 0.05~ ^0.1m3 /h, the first three times of the calcium nitrate are based on 30 days, 60 days, and 90 days. The frequency of dosing is once every 3 months. 9. A method for in-situ treatment of black and smelly water bodies according to claim 1, characterized in that the components of the biological growth promoter are organic acids, biological enzymes, buffers, vitamins and purines, and the The dosage of biological growth promotion is 0.1mL/L, once every 45 days, the dosage of the denitrifying bacteria is 0.25g/m ³ ~ 0.5g/m ³ , the first three times of the denitrifying bacteria are Add according to the frequency of 30 days, 60 days and 90 days, and then add once every 3 months. 10. A method for in-situ treatment of black and odorous water, characterized by comprising the following steps: Turbidity sensors detect the turbidity of water and obtain turbidity information; The turbidity information is compared with the preset turbidity information to obtain a deviation threshold; Determine whether the deviation threshold is greater than the preset deviation threshold. If it is greater, the micro-nano aeration device is controlled to continue aeration. If it is less than the micro-nano aeration device, the micro-nano aeration device is automatically closed.