River and lake sediment dynamic in-situ ecological efficient disposal system and operation method thereof

Abstract

This invention provides a dynamic in-situ ecological and efficient treatment system for river and lake sediments and its operation method. The system includes: a signal processing unit 1, a power energy unit 2, a sludge treatment unit 3, a discharge unit 4, and a sludge absorption unit 5. All these units are mounted on a transport platform 6-1, which has wheels at its bottom and can move along guide rails 2-4 along a preset trajectory. The signal processing unit 1 interacts with a satellite 6-2 and exchanges information with a ground-based central control unit 6-3. The sludge treatment unit 3 treats the sludge using fixed packing material and then discharges it in situ. This invention eliminates the need for manual entry into the river channel. The sludge treatment unit achieves green treatment through fixed packing material, resulting in high purification efficiency, convenient operation, and a high degree of automation.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection and sludge treatment technology, and specifically relates to an operation method for a dynamic in-situ ecological and efficient treatment system for river and lake bottom sediment. Technical Background

[0002] The treatment of river and lake sediments is a core component of river and lake ecological restoration and water environment management. Suspended solids, aquatic organism remains, and particulate pollutants in river water continuously accumulate on the riverbed under the influence of hydrodynamic sedimentation and gravity, forming a sedimentary layer. In the in-situ anaerobic environment of the river, this sediment undergoes microbial decomposition and biochemical reactions, continuously producing harmful gases. These gases not only escape into the water and coastal air, disrupting the dissolved oxygen balance and threatening the survival of aquatic organisms, but also directly affect the stability of the riparian ecosystem and the quality of life for residents, becoming a key factor in improving the river's ecological environment.

[0003] Meanwhile, the uneven distribution of sediment and varying thickness of anaerobic siltation in the dynamic flow environment of rivers, coupled with the safety risks posed by the release of harmful gases, pose significant operational obstacles to traditional manual dredging and ex-situ treatment operations, making it difficult to achieve ecological and long-term sediment management. Therefore, a method for operating a dynamic in-situ ecological sediment treatment system is needed. This system should ensure operational safety and adapt to the dynamic hydrological characteristics of rivers, efficiently removing accumulated sediment through an automated and systematic in-situ treatment process, while simultaneously improving riverbed texture and the aquatic ecological environment, thus achieving synergistic progress in sediment management and river ecological protection.

[0004] Chinese invention patent application CN202223327694.9, entitled "An Ecological Island for In-situ Remediation of River and Lake Sediments," is characterized by providing an ecological island suitable for in-situ remediation of polluted river and lake sediments. The ecological island comprises a sediment treatment area, a purification area, and a slope area. The sediment treatment area consists of a sediment layer, an impermeable layer, and a barrier layer, which seals and stabilizes the polluted sediment within the ecological island, reducing the risk of pollutant release into the water. The purification area consists of a filter layer, a planting layer, and a protective layer, which efficiently reduces pollutants in the sediment and water by constructing a stable and benign ecosystem. The slope area uses pine pile slopes and / or gabion revetments to enhance the physical stability of the ecological island. This ecological island has a simple structure, flexible application, and strong suitability, and can be widely used in ecological restoration projects for rivers and lakes with sediment pollution. While this method solves the problem of in-situ sludge treatment, its treatment scope is limited, and real-time monitoring of the sediment state is not possible.

[0005] Chinese invention patent application CN202010257357.3, entitled "A Technology Applicable to the Treatment and Disposal of River and Lake Sediment," is characterized by disclosing a technology applicable to the treatment and disposal of river and lake sediment, comprising four stages: Stage 1: sampling, testing, and analysis of river (lake) sediment; Stage 2: river (lake) sediment pollution control technology; Stage 3: river (lake) sediment treatment technology; and Stage 4: river (lake) sediment disposal technology. It proposes a mature technology applicable to the treatment and disposal of river (lake) sediment, taking treated sediment samples for testing and comparing them with relevant standards for each indicator. The sediment treated by the above process has a compaction degree of approximately 85%, a moisture content of approximately 65%, and an organic matter content of approximately 10%. Simultaneously, leaching tests were conducted on the sediment, and the results showed that all chemical indicators were ND (not detected). While this method provides a method for river sludge disposal, it cannot perform in-situ sludge treatment and cannot meet the requirements for long-term sludge disposal and testing.

[0006] Chinese invention patent application CN201810319167.2, entitled "An In-situ Remediation System and Method for Heavy Metal Polluted River and Lake Sediments," is characterized by the following: This invention relates to the field of in-situ remediation and dewatering technology for polluted river and lake sediments, specifically a system and method for in-situ remediation of heavy metal polluted river and lake sediments. The system includes a square steel plate mold frame, the lower part of which is inserted into the river and lake sediment. A volatile organic pollutant (VOC) gas collection bag is located on the upper part of the steel plate mold frame, connected to a VOC gas treatment system via a gas extraction pipe. At the four corners of the steel plate mold frame are respectively equipped with a non-volatile organic pollutant treatment device (I), a heavy metal and VOC treatment device (II), and a non-volatile organic pollutant treatment device (III). The steel plate mold frame also includes an electric remediation system and a wastewater discharge system. This invention simultaneously applies electric remediation and dewatering technologies to the treatment of river and lake sediments, resulting in an economical, practical, and environmentally friendly solution with good effects. The method is simple to operate and produces no secondary pollution. While the device provides an in-situ treatment method for heavy metal-contaminated river and lake sediments, it cannot treat other pollutants. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this invention provides a dynamic in-situ ecological and efficient treatment system for river and lake sediments and its operation method. This system utilizes a transport platform for automated treatment of river and lake sediments, achieving green and environmentally friendly results without the need for chemical intervention, avoiding secondary pollution, and offering significant advantages in energy conservation and environmental protection. Furthermore, the entire operation can be completed from a central control room without personnel needing to descend into the river or lake sediment area, ensuring the safety of operators.

[0008] Technical solution: The objective of this invention is achieved through the following technical means:

[0009] A dynamic in-situ ecological and efficient treatment system for river and lake sediments includes a transport platform mounted on pre-laid guide rails. The system uses an onboard multi-functional detection device to monitor the sediment. The detection data is then transmitted via a portable signal processor to simultaneously activate onboard modules for targeted treatment, achieving the desired sediment treatment effect. The specific steps are as follows:

[0010] Step 1: The transport platform (6-1) uses a pre-installed multi-functional detection device (1-3) to detect the bottom sludge and obtain the necessary information, such as temperature, pH, and organic matter. The obtained information is processed by a portable signal processor (1-2). If the sludge moisture content W is too high, dewatering is required until the sludge moisture content is below 60%. After dewatering, the sludge is transported to the treatment unit (3) via a sludge conveyor belt (5-5). The corresponding correction coefficient is calculated using equation (1). The sludge contamination degree needs to be calculated first using equation (2) to obtain the pollutant concentration C of the bottom sludge after dewatering. w Finally, the corrected sediment pollutant concentration C after dewatering is obtained through equation (3). dc .

[0011] Equation (1)

[0012] T: Measured temperature of sediment, in °C; pH: Measured acidity / alkalinity of sediment, dimensionless; ω: Measured organic matter mass fraction of sediment, in %; α T Temperature correction factor, dimensionless; α P : pH correction factor, dimensionless; α o Organic matter correction coefficient, dimensionless;

[0013] Equation (2)

[0014] Note: C d Concentration of contaminants in the sediment after dewatering, in mg / kg; C w : Target pollutant concentration in wet sludge, taken as the highest detected pollutant concentration, unit: mg / kg; W: Sludge moisture content (dimensionless, range: 0-1); β: Moisture content of dewatered wet sludge, dimensionless.

[0015] Equation (3)

[0016] C dc Corrected concentration of contaminants in the dewatered sediment, in mg / kg;

[0017] Step 2: Calculate the corrected dewatered sludge contamination level C. dc According to equation (4), the total mass M of pollutants to be removed can be calculated. r , unit g.

[0018] Equation (4)

[0019] Rr: Demand pollutant removal rate; V: Platform volume, m³.

[0020] Step 3: During the purification process, the sludge mixer (3-5) will agitate the purification zone (3-1) to ensure thorough purification of the bottom sludge. The bottom detection unit (3-4) will monitor the state of the bottom sludge in real time. The pollutant removal rate Q per unit time of the platform can be calculated using equation (5). r Combined with the operating load factor θ, the sludge treatment time t can be calculated using equation (6);

[0021] Equation (5)

[0022] Q r Pollutant treatment capacity per unit time, in g / d; K r : Pollutant removal rate constant, unit g / d; θ: System operating load coefficient, dimensionless, default full load (0-1).

[0023] Equation (6)

[0024] t: Sludge treatment time, in days.

[0025] Beneficial effects: Compared with the prior art, the advantages of this invention are:

[0026] (1) The transport platform 6-1 of the present invention is intelligently controlled and adjusted in real time by the central controller 6-3, eliminating the need for manual entry into the river channel, thus reducing the risk to the operators from the source, and can also be adjusted in real time according to the on-site conditions.

[0027] (2) The sludge treatment unit 3 involved in this invention achieves green treatment through fixed biological filter media, which does not cause secondary pollution to the river, and has high purification efficiency, wide treatment range, convenient operation, long service life and high adaptability.

[0028] (3) The present invention uses the sludge absorption unit 5 to absorb sludge deep inside the sludge through the sludge absorber, which can reduce the spread of pollutants into the water body due to disturbance during the sludge removal process and thus reduce water pollution. Attached Figure Description

[0029] Figure 1 This is a diagram showing the layout of the various modules of a dynamic in-situ ecological and efficient treatment system for river and lake sediments according to the present invention.

[0030] Figure 2 This is a cross-sectional layout diagram of a dynamic in-situ ecological and efficient treatment system for river and lake sediments according to the present invention.

[0031] Figure 3 This is a front view of the transport platform 6-1;

[0032] Figure 4 This is a side view of the transport platform 6-1;

[0033] Figure 5 This is a top view of the transport platform 6-1;

[0034] Figure 6 This is a schematic diagram illustrating the operational principle of a dynamic in-situ ecological and efficient treatment system for river and lake sediments.

[0035] Figure 7 A simplified flowchart of the operation method of a dynamic in-situ ecological high-efficiency treatment system for river and lake bottom sediment;

[0036] In the diagram: 1-Signal processing unit; 2-Power energy unit; 3-Sludge treatment unit; 4-Discharge unit; 5-Sludge absorption unit.

[0037] 1-1-Signal receiver; 1-2-Portable signal processor; 1-3-Multifunctional detection device.

[0038] 2-1-Battery; 2-2-Power supply; 2-3-Wheel; 2-4-Guide rail.

[0039] 3-1-Purification zone; 3-3-Fixed packing material; 3-4-Detection unit; 3-5-Sludge mixer.

[0040] 4-1-Sludge discharge outlet; 4-2-Drainage pipe.

[0041] 5-1-Sludge dewatering tank; 5-2-Agitator; 5-3-Sludge absorption device; 5-5-Sludge conveyor belt; 5-6-Temporary sewage storage tank.

[0042] 6-1-Launch platform; 6-2-Satellite transceiver; 6-3-Central controller; 6-4-Pressure buffer; 6-5-Riverbed sediment.

[0043] 1-3-1-Detection unit.

[0044] 2-3-1-Adjusting rod; 2-3-2-Shock-absorbing spring; 2-3-3-Pressure sensor; 2-3-4-Chassis.

[0045] 5-2-1-Motor; 5-3-1-High-pressure pump; 5-3-2-Sludge suction pipe. Detailed Implementation

[0046] The technical solution of the present invention will be further described through the following specific embodiments.

[0047] Reference Figures 1 to 7As shown, a dynamic in-situ ecological and efficient treatment system for river and lake sediment includes: a signal processing unit 1, a power energy unit 2, a sludge treatment unit 3, a discharge unit 4, and a sludge absorption unit 5. All of these units are mounted on a transport platform 6-1, which has wheels 2-3 at its bottom for movement along pre-set guide rails 2-4. The signal processing unit 1 interacts with a transceiver satellite 6-2 and exchanges information with a ground-based central control unit 6-3. The signal processing unit executes commands based on real-time information, while the transport platform's real-time operational data is monitored and synchronized to the central controller for real-time adjustments. This invention provides fully automated treatment of river sediment, eliminating the need for river pumping operations, while simultaneously protecting the river's ecosystem and improving the long-term stable operation of the river.

[0048] The signal processing unit 1 includes a multi-functional detection device 1-3, a signal receiver 1-1, and a portable signal processor 1-2 connected to the signal receiver 1-1. The multi-functional detection device 1-3 is located below the transport platform and detects the bottom sludge to obtain the required sludge pollution information (such as temperature, pH, and organic matter information), transmitting the obtained information to the portable signal processor 1-2 for further processing. When the sludge moisture content W is too high, dewatering is required. After dewatering, the sludge is conveyed to the sludge treatment unit 3 via a sludge conveyor belt 5-5. The signal processing unit 1 transmits the obtained information in real time to the central controller 6-3 on the ground via a transceiver satellite 6-2, and simultaneously adjusts the operating status of the four units: the power energy unit 2, the sludge treatment unit 3, the discharge unit 4, and the sludge absorption unit 5.

[0049] The sludge absorption device 5-3 adjusts the sludge absorption rate based on real-time feedback data. First, the sludge is dewatered, and the wastewater is discharged to the temporary wastewater storage tank 5-6 below. The dewatered sludge enters the sludge mixing tank 5-1, where the agitator 5-2 mixes the sludge. The mixed sludge is then conveyed to the fixed packing material 3-3 via the sludge conveyor belt 5-5. The detection unit 3-4 at the bottom of the fixed packing material monitors the sludge status in real time and performs coupled treatment through the purification zone 3-1 and the fixed packing material 3-2 until the sludge treatment indicators meet the standards. The treated sludge is discharged through the sludge discharge port 4-1. If there is rain, any water accumulation in the sludge tank 3-3 will be drained through the drain pipe at the bottom of the fixed packing material. The power supply 2-2 can provide individual power to each unit of the transport platform. It can also charge the signal processing unit 1 on-site or replace the built-in battery 2-1 as needed. After the in-situ treatment is completed, the power supply 2-2 drives the wheels 2-3 along the guide rail 2-4 to the next predetermined area.

[0050] Example 1:

[0051] The object to be treated in this embodiment is as follows: A river is 100 m long, 10 m wide on average, with a river area of ​​1000 m², an average water depth of 1.5 m, and a total water volume of 1500 m³. Due to long-term reception of community domestic sewage leakage, surface runoff pollutants, and fallen leaves, the riverbed sediment has accumulated to a thickness of 0.4-0.6 m, with a total sediment volume of approximately 400 m³. The main pollutants in the sediment are total nitrogen and total phosphorus. The treatment target is in accordance with the "Sludge Treatment Standard for Urban Wastewater Treatment Plants - Sludge for Landscaping" (GB / T 23486-2009).

[0052] Reference Figure 7 As shown, the operation method of a dynamic in-situ ecological high-efficiency treatment system for river and lake bottom sediments includes the following steps:

[0053] Step 1: The signal processing unit uses a pre-processor multi-functional detection device to analyze the riverbed sediment. The total nitrogen concentration is measured to be 520 mg / kg, and the total phosphorus concentration is 380 mg / kg. The highest detected pollutant concentration is taken as the target pollutant concentration for this wet sludge analysis. Therefore, C... w =520mg / kg, the temperature, pH and organic matter were detected; the values ​​are as follows: T=30℃, pH=7.3, ω=10% (the measured organic matter mass fraction of the bottom sludge, %). Since temperature, pH and organic matter content will affect the form transformation and release of pollutants in sludge, it is necessary to correct the temperature, pH value and organic matter. The correction coefficients for temperature, pH and organic matter are calculated by formula (1). ; =1.002; =1.1;

[0054] Equation (1)

[0055] The sludge moisture content W=0.9 >0.60, requiring dewatering. After dewatering, the sludge moisture content β=55% was measured. The dewatered sludge was then transported in three batches via sludge conveyor belt 5-5 to the purification area 3-1 of treatment unit 3, with a 4-hour interval between each batch.

[0056] The corresponding pollutant concentration of the dewatered sediment, calculated according to equation (2), is Cd = 520 ÷ (1 - 0.9) × (1 - 0.55) = 2340 mg / kg; finally, the corrected pollutant concentration C of the dewatered sediment is obtained through equation (3). dc =2340×1.05×1.002×1.1=2708.11mg / kg.

[0057] Equation (2)

[0058] Equation (3)

[0059] Step 2: Calculate the corrected dewatered sludge contamination level C. dc According to equation (4), the total mass M of pollutants to be removed can be calculated. r .

[0060] The total amount of pollutants M can be calculated according to formula (5). r .

[0061] Equation (4)

[0062] M r =2708.11×0.8×500=1083.24g.

[0063] Step 3: During the purification process, the sludge agitator (3-5) will agitate the fixed packing 3-3 to ensure thorough purification of the bottom sludge. To allow for real-time monitoring of the sludge contaminant decomposition, the detection unit 3-4 at the bottom of the fixed packing 3-3 will monitor the bottom sludge status. Based on the operating load factor θ, the daily contaminant removal capacity Q of the transport platform can be calculated using equation (5). r The sludge treatment time t can be calculated using equation (6).

[0064] Equation (5)

[0065] Qr = 100 × 500 × 0.9 = 45 g / d

[0066] Sludge treatment time t (6):

[0067] Equation (6)

[0068] t = 1083.24 ÷ 45 = 24.07 d.

[0069] Start the sludge treatment unit (3), and the sludge agitator (3-5) continuously agitates at a speed of 28 rpm to ensure that the bottom sludge is in full contact with the fixed packing material;

[0070] The total nitrogen concentration in the treated sludge was 28 mg / kg, and the total phosphorus concentration was 20 mg / kg, with removal rates of 94.6% and 95.0%, respectively. The pollution concentrations meet the requirements of the standard "Sludge Quality for Landscaping and Greening Use in Urban Wastewater Treatment Plants" (GB / T 23486-2009).

[0071] This targeted treatment and river / lake sediment treatment process has been completed, and the sediment micro-topography has been leveled after treatment.

[0072] Example 2:

[0073] The river section to be treated in this embodiment is 8.2 km long, with an average width of 45 m, an average depth of 2.3 m, and a drainage area of ​​12.6 km². It mainly receives domestic sewage from surrounding residential areas, industrial wastewater from small businesses, and non-point source pollution from farmland. The sediment thickness is 0.8-1.5 m, with a total sediment accumulation of approximately 4.2 × 10⁻⁶ m. 4 The sludge volume is m³, indicating severe sludge pollution. Treatment objective: The organic matter pollution concentration should meet the standards outlined in the "Sludge Quality Standard for Landscaping and Landscaping Use" (GB / T 23486-2009). Specific steps are as follows:

[0074] Step 1: The transport platform 6-1 uses a pre-mounted multi-functional detection device to test the riverbed sediment. The total nitrogen concentration was measured to be 680 mg / kg, and the total phosphorus concentration was 400 mg / kg. The highest detected pollutant concentration was taken as the target pollutant concentration for this wet sludge test. Therefore, C w =680mg / kg, the measured values ​​of temperature, pH and organic matter are as follows: T=35℃, pH=8.5, ω=9%. Because the external environment affects the ease of removing pollutants from sludge, it is necessary to correct the temperature, pH and organic matter. The correction coefficients for temperature, pH and organic matter are calculated by formula (1), which are respectively ; =1.01; =1.08; the test confirmed that the sludge moisture content W=0.88>0.60 needs to be dewatered. After dewatering, the sludge moisture content β=57% was measured. The dewatered sludge was transported in three batches to the fixed packing material 3-3 of the treatment unit 3 via sludge conveyor belt 5-5, with an interval of 4 hours between each batch.

[0075] The corresponding pollutant concentration C of the dewatered sediment is calculated according to formula (2). d =2436.67mg / kg, and finally the corrected sediment pollutant concentration C after dewatering was obtained by equation (3). dc =2711.08 mg / kg.

[0076] Step 2: Calculate the corrected dewatered sludge contamination level C. dc The total amount of pollutants M can be calculated according to equation (4). r =974.67g.

[0077] Step 3: During the purification process, the sludge agitator (3-5) agitates the fixed packing material 3-3 to ensure thorough purification of the bottom sludge. The bottom sludge condition is monitored in real time by the detection unit (3-4) at the bottom. Combined with the operating load factor θ, the pollutant removal rate Q per unit time of the transport platform can be calculated using equation (6). r=45g / d, and the sludge treatment time t=21.66d can be calculated by formula (7).

[0078] Start sludge treatment unit 3, and sludge agitator 3-5 continuously agitates at a speed of 35 rpm to ensure full contact between bottom sludge and fixed packing material; bottom detection unit 3-4 feeds back data to the control system in real time and dynamically adjusts operating parameters.

[0079] The total nitrogen concentration in the treated sludge was 26 mg / kg, and the total phosphorus concentration was 20 mg / kg, with removal rates of 96.2% and 95%, respectively. The pollution concentrations meet the treatment requirements of the standard "Sludge Disposal for Urban Wastewater Treatment Plants - Sludge Quality for Landscaping" (GB / T 23486-2009). The treatment cycle for a single site is set at 30 days, with a 15-day interval required after the entire river is treated. Treatment will continue for 12 months, with the fixed packing material replaced as needed during this period to ensure the purification rate remains stable at a high level.

[0080] This remediation and river / lake sediment treatment process has been completed.

[0081] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dynamic in-situ ecological and efficient treatment system for river and lake bottom sediment, characterized in that, include: The signal processing unit (1), power energy unit (2), sludge disposal unit (3), discharge unit (4), and sludge absorption unit (5) are all arranged on the transport platform (6-1). The transport platform (6-1) can move along the guide rail (2-4) according to the preset trajectory. The signal processing unit (1) interacts with the satellite (6-2) and exchanges information with the ground central control (6-3). The sludge disposal unit (3) discharges the sludge in situ after harmlessly treating it with fixed packing material.

2. The dynamic in-situ ecological and efficient treatment system for river and lake bottom sediments according to claim 1, characterized in that, The signal processing unit (1) includes a multi-functional detection device (1-3), a signal receiver (1-1), and a portable signal processor (1-2) connected to the signal receiver (1-1). The multi-functional detection device (1-3) is set below the transport platform to detect the bottom sediment and obtain the required sludge pollution information; the signal processing unit (1) will transmit the obtained information to the ground central controller (6-3) via the satellite (6-2) for real-time data feedback, and adjust the operation status of the four units in real time: the power energy unit (2), the sludge disposal unit (3), the discharge unit (4), and the sludge absorption unit (5).

3. The dynamic in-situ ecological and efficient treatment system for river and lake bottom sediments according to claim 2, characterized in that, The power source (2-2) in the power energy unit (2) supplies power to each unit individually. After the in-situ treatment of sludge in one area is completed, the wheels (2-3) at the bottom of the driving platform (6-1) move along the guide rail (2-4) to the next area. The wheels (2-3) are directionally adjusted via the adjusting rod (2-3-1). The shock-absorbing spring (2-3-2) is installed between the transport platform and the chassis (2-3-4) to reduce mechanical damage caused by vibration during operation. The pressure sensor (2-3-3) is installed between the transport platform and the chassis (2-3-1) to transmit the pressure borne by the transport platform to the central controller (6-3). The platform is overloaded and provides real-time feedback and early warning.

4. The dynamic in-situ ecological and efficient treatment system for river and lake bottom sediments according to claim 1, characterized in that, The sludge treatment unit (3) treats sludge by adsorption through packing. The sludge transported by the sludge absorption unit (5) passes through the purification zone (3-1), and the fixed packing (3-3) purifies the sludge. In order to fully purify the sludge, the sludge agitator (3-5) will continuously disturb the bottom sludge of the purification zone (3-1) according to the preset program. The bottom detection unit (3-4) monitors the sludge status in real time and adjusts the sludge treatment time in real time and provides feedback based on the monitoring results.

5. The dynamic in-situ ecological and efficient treatment system for river and lake bottom sediments according to claim 1, characterized in that, The sludge treatment unit (3) is equipped with a sludge discharge port (4-1) and a drain pipe (4-2) at the bottom; the treated sludge is discharged through the sludge discharge port (4-1), and the water in the purification area (3-1) is discharged through the drain pipe (4-2); Among them, a sludge blocking net is installed above the drainage pipe (4-2). During operation, the sludge is blocked to prevent the sludge from damaging and clogging the drainage pipe.

6. The dynamic in-situ ecological and efficient treatment system for river and lake bottom sediments according to claim 1, characterized in that, The sludge absorption unit (5) includes a sludge absorption device (5-3), which first dewaters the sludge, and discharges the wastewater generated by dewatering into a temporary wastewater storage tank (5-6). The mixed sludge is conveyed to the sludge disposal unit (3) through a sludge conveyor belt (5-5). The agitator (5-2) is connected to a motor (5-2-1) to obtain a power source. The high-pressure pump (5-3-1) is connected to the sludge absorption device (5-3).

7. The operation method of the dynamic in-situ ecological high-efficiency treatment system for river and lake bottom sediment as described in claim 1, characterized in that, The steps are as follows: Step 1: The transport platform (6-1) uses a pre-installed multi-functional detection device (1-3) to detect the bottom sludge and obtain information such as temperature, pH, and organic matter required for sludge. The obtained information is processed by a portable signal processor (1-2). If the sludge moisture content W is too high, it needs to be dewatered until the sludge moisture content is below 60%. After dewatering, it is sent to the treatment unit (3) via a sludge conveyor belt (5-5). The corresponding correction coefficient is calculated using formula (1). The sludge contamination degree needs to be calculated first using formula (2) to obtain the pollutant concentration C of the bottom sludge after dewatering. w Finally, the corrected sediment pollutant concentration C after dewatering is obtained through equation (3). dc ; Equation (1) T: Measured temperature of bottom sediment, in °C; pH: Measured acidity and alkalinity of bottom sediment, dimensionless; ω: Measured organic matter mass fraction in sediment, in % α T Temperature correction factor, dimensionless; α P : pH correction factor, dimensionless; α o Organic matter correction coefficient, dimensionless; Equation (2) C d Concentration of contaminants in the sediment after dewatering, in mg / kg; C w : Target pollutant concentration in wet sludge, taken as the highest detected pollutant concentration, in mg / kg; W: Sludge moisture content (dimensionless, range 0-1); β: Moisture content of wet sludge after dewatering, dimensionless; Equation (3) C dc Corrected concentration of contaminants in the dewatered sediment, in mg / kg; Step 2: Calculate the corrected dewatered sludge contamination level C. dc According to equation (4), the total mass M of pollutants to be removed can be calculated. r Unit: g; Equation (4) Rr: Demand pollutant removal rate; V: Platform volume, in m³; Step 3: During the purification process, the sludge mixer (3-5) will agitate the purification zone (3-1) to ensure thorough purification of the bottom sludge. The bottom detection unit (3-4) will monitor the state of the bottom sludge in real time. The amount of pollutants removed per unit time by the platform can be calculated using equation (5). r Combined with the operating load factor θ, the sludge treatment time t can be calculated using equation (6); Equation (5) Q r Pollutant treatment capacity per unit time, in g / d; K r : Pollutant removal rate constant, unit g / d; θ: System operating load coefficient, dimensionless, default full load (0-1). Equation (6) t: sludge treatment time, in days.

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