Monitoring device and monitoring method for in-situ remediation of black and odorous water body

Abstract

The invention discloses a monitoring device and a monitoring method for in-situ remediation of a black and odorous water body, and relates to the technical field of water quality environment monitoring, the monitoring device and the monitoring method for in-situ remediation of the black and odorous water body are convenient for directly observing and comparing the apparent change of water quality, convenient for collecting water and sediment samples, and convenient for monitoring. According to the method, the apparent change of water and key indexes such as basic water quality indexes, bottom mud structural composition changes, micro-ecological effects, oxidation-reduction potential, micro-current and voltage can be monitored in real time, and the change conditions of various pollutants in the water body and the bottom mud in the in-situ remediation process of the black and odorous water body are determined; indexes such as basic water quality and apparent change, gas generation and emission reduction, basic water quality index and apparent phenomenon change in a continuous water flow mode in-situ remediation process, bottom mud micro-current and voltage change in the remediation process and the like are selected, so that the effects of different types of materials and in-situ remediation technology for remediation of the black and odorous water body can be effectively evaluated; and repairing materials and repairing technologies can be screened quickly and efficiently.

Description

Technical Field

[0001] The invention relates to the technical field of water quality environment monitoring, and in particular to a monitoring device and a monitoring method for in-situ remediation of black and odorous water bodies. Background Art

[0002] With the rapid advancement of industrialization and urbanization, the concentration of people has led to a large amount of domestic sewage and industrial wastewater being discharged directly into the river without treatment or incomplete treatment, causing serious environmental pollution and ecological damage to the river. Among them, the nitrogen, phosphorus and organic matter in the river water seriously exceeded the standard, causing the dissolved oxygen in the water to be rapidly consumed, resulting in the black and smelly phenomenon of the water.

[0003] The restoration technologies for black and smelly river water bodies and bottom mud are divided into in-situ and ex-situ. Ex-situ restoration technology refers to digging out the river bottom mud and then treating it off-site. Its treatment effect is relatively fast, but in actual application, the amount of bottom mud dredging engineering is large, the treatment cost is high, the site requirement is large, and it is easy to cause secondary pollution and affect the ecological function of the river. In-situ restoration technology refers to the coordinated restoration of polluted mud water in situ in the river. By adopting some environmentally friendly functional materials or microbial agents and assisting some physical measures, the self-repair function of the river is restored, thereby achieving the purpose of comprehensive treatment of black and smelly rivers.

[0004] Currently, there are some in situ river restoration technologies that use mineral material covering, micro-nano aeration assisted microbial agents, etc., but these technologies mainly focus on short-term apparent changes in water bodies, and there are fewer long-term monitoring of water quality changes and investigations on the effects of the adopted technologies. In particular, for different types of black and odorous water bodies, the actual application effects of materials and in situ restoration technologies vary greatly, and there is a lack of effective investigation methods and indicator evaluation systems. Therefore, we propose a monitoring device and evaluation method for in situ restoration of black and odorous water bodies. We select water body apparent changes, basic water quality indicators, gas emissions, and changes in sediment microcurrent and voltage as the main indicators for evaluating restoration effects, establish an evaluation index system and evaluation method, and then build different combinations of in situ restoration monitoring devices to conduct data monitoring and effect evaluation, which is convenient for quickly and efficiently screening restoration materials and restoration technologies, and optimizing the relevant treatment systems for black and odorous water bodies. Summary of the invention

[0005] The purpose of the present invention is to provide a monitoring device and a monitoring method for in-situ remediation of black and odorous water bodies, so as to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A monitoring device and a monitoring method technical solution for in-situ restoration of black and odorous water bodies. The monitoring device comprises a gas washing bottle group. The gas washing bottle group has four groups, and the gas washing bottle group includes three screw-mouth gas washing bottles.

[0008] By setting up four groups of scrubbing bottles, each of which includes three screw-capped scrubbing bottles, it is convenient to set up a control experiment, which can effectively compare the parameter changes of black and odorous water bodies under different treatment methods and increase the accuracy of the experimental results.

[0009] Furthermore, a scale is arranged on the screw-mouth gas washing bottle, the screw-mouth gas washing bottle is made of a transparent glass material, and three openings are arranged on both sides of the screw-mouth gas washing bottle.

[0010] By using a screw-mouth gas washing bottle made of transparent material, changes in physical parameters such as color and volume of the experimental sample can be observed at any time. At the same time, multiple openings are set to facilitate the collection and addition of materials.

[0011] Furthermore, the monitoring device also includes three air bags, and the three air bags are respectively connected to the open pipes above the three screw-mouth washing bottles of the second group.

[0012] By setting up the air bag, all the gases generated by the three screw-capped washing bottles in the second group during the experiment can be collected, which is convenient for subsequent gas detection.

[0013] Furthermore, the monitoring device also includes a water pump and a water tank. A water tank is provided on one side of the water pump, and a wastewater tank is provided on the side of the water pump away from the water tank. The input end of the water pump is connected to the water tank pipe. There are three water pumps, and the output ends of the three water pumps are respectively connected to the middle opening pipes of the three screw-mouth washing bottles of the third group close to the water pump side, and the upper openings of the three screw-mouth washing bottles of the third group away from the water pump side are connected to the wastewater tank pipe.

[0014] The water in the water tank is pumped out by a water pump, and then the water pump sends the pumped water into the screw-mouth washing bottle through the opening of the connected screw-mouth washing bottle. The water level in the screw-mouth washing bottle is raised by the water sent out by the water pump until it is raised to the same level as the opening connected to the wastewater tank. Then, the excess water is sent from the opening connected to the wastewater tank to the wastewater tank, thereby simulating the influence of flowing water on the experiment.

[0015] Furthermore, the monitoring device also includes an electrical signal detection device, there are three electrical signal detection devices, the three electrical signal detection devices are respectively connected to the three screw-mouth gas washing bottles of the fourth group, the electrical signal detection device includes a signal display device, a cathode conductive rod and an anode conductive rod, the cathode conductive rod and the anode conductive rod are placed in the connected screw-mouth gas washing bottles, the cathode conductive rod and the signal display device are electrically connected, and the anode conductive rod and the signal display device are electrically connected.

[0016] By connecting three electrical signal detection devices to the three screw-capped gas washing bottles of the fourth group respectively, the electrical signals of the three screw-capped gas washing bottles can be monitored simultaneously, thereby ensuring the accuracy of the experimental results. By placing the cathode conductive rod and the anode conductive rod into the screw-capped gas washing bottles, the conductive ion content in the gas washing bottles can be detected. The more conductive ions there are, the better the conductive effect. The conductive effect reflects the changes in the conductive ions during the experiment, thereby reflecting its effect.

[0017] Further, the monitoring method comprises the following steps:

[0018] S1. Place the bottom mud and water of the black and smelly water body into three screw-mouth washing bottles of four groups of washing bottles in different proportions;

[0019] S2. The three screw-mouth gas washing bottles in each gas washing bottle group are treated by three methods: no composite material is added, the composite material is covered on the surface of the black and odorous water body, and the composite material and the black and odorous water body are mixed and added;

[0020] S3. After the experiment started, the first group of gas washing bottles was not treated in any way;

[0021] The second group of gas washing bottles is connected to the air bag pipeline, and the gas generated in the screw-mouth gas washing bottles of the second group of gas washing bottles is collected through the air bag;

[0022] The third group of gas washing bottles is connected to the water pump pipeline, and the water pump is used to simulate the effect of continuous water flow on the experiment;

[0023] The fourth gas washing bottle group is connected to the electric signal detection device, and the change of the electric signal is detected by the electric signal detection device.

[0024] S4. Before starting the experiment, samples in the screw-capped washing bottles in each group of washing bottles are sampled and tested to test the chemical parameters and physical parameters of the samples. After the experiment starts, samples are sampled and tested again at a set time as required.

[0025] Furthermore, the composite material includes but is not limited to Fe / Mn bimetallic loaded natural zeolite composite material.

[0026] By adding active metals as materials, it is helpful to replace other ions in the black and smelly water body, thereby facilitating the repair of the black and smelly water body.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The four groups of gas washing bottles can monitor in real time the apparent changes of overlying water and key indicators such as basic water quality indicators, changes in sediment structure and composition, microecological effects, redox potential, microcurrent and voltage, and clarify the changes of various pollutants in the water body and sediment during the in-situ remediation of black and odorous water bodies.

[0029] 2. The gas washing bottle is equipped with multiple water inlets and mud discharge ports. The changes in physical indicators such as the color and state of the bottom mud and overlying water can be directly observed through the transparent bottle body. There are also multiple combinations, which are easy to build and can be modified and enlarged as needed.

[0030] 3. Based on comprehensive considerations such as water quality and pollutant indicators, inhibition and release of black and odorous substances, sediment structure characteristics, and microbial population characteristics, a river health assessment method can be established to improve the ecology of black and odorous water bodies and restore self-repair functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the first gas washing bottle group of the present invention;

[0032] Figure 2 This is a schematic structural diagram of a second group of gas washing bottles of the present invention;

[0033] Figure 3 This is a schematic structural diagram of the third gas washing bottle group of the present invention;

[0034] Figure 4 This is a schematic structural diagram of the fourth gas washing bottle group of the present invention.

[0035] In the figure: 1. gas washing bottle group; 2. air bag; 3. water pump; 4. water tank; 5. electric signal detection device; 51. signal display device; 52. cathode conductive rod; 53. anode conductive rod; 6. screw-mouth gas washing bottle. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1: The first group of washing bottles 1, the first group of washing bottles 1 includes three screw-mouth washing bottles 6, the sludge and water in the black and odorous water body are placed into the three screw-mouth washing bottles 6 of the first group of washing bottles 1 according to the black and odorous water body sludge ratio of 40%, water ratio of 60%, and the use of composite materials of 10% of the sludge, and then some samples are taken out, and the original samples are subjected to physical and chemical tests. The test results are shown in Table 1. Finally, the three screw-mouth washing bottles 6 are treated in three ways: no composite material is added, the composite material is covered on the surface of the black and odorous water body, and the composite material and the black and odorous water body are mixed and added, and then the samples are taken out again on the 30th day to add the composite material. The samples were tested, and the test results are shown in Table 2. According to the experimental phenomena, it can be observed that the water in the screw-mouth washing bottle 6 without adding the composite material is partially turbid, the transparency changes little, and the surface sediments hardly change; the screw-mouth washing bottle 6 in the treatment method of covering the black and odorous water with the composite material, the water quickly becomes clear, the transparency is significantly improved, the surface sediments react quickly and gradually change, and a large amount of S single substance is precipitated in the micro-surface layer after 30 days; the screw-mouth washing bottle 6 in the treatment method of mixing the composite material and the black and odorous water, the water part gradually becomes clear, the transparency gradually improves, the surface sediments gradually react, and the S single substance is continuously precipitated in the micro-surface layer. From the data in Table 2, it can be seen that the pH of the water body increased from the original 7.13 to 8.01 and 7.54 respectively; DO increased from 1.75 mg / L to 5.96 mg / L and 5.01 mg / L respectively; the conductivity EC decreased significantly, and could be quickly reduced from 1406 μs / cm to 8.25 μs / cm and 9.08 μs / cm respectively; the nutrient sources TOC and NH in the water body ... nutrient sources TOC and NH 4 + -N, TN and TP as well as the contents of heavy metals Cd, Cr, Cu and Pb also showed a significant downward trend. Overall, with the same amount of materials used, the apparent surface coverage and water quality changes were better than those of mixed addition.

[0038] Table 1. Results of determination of basic water quality indicators of original samples

[0039]

[0040] Table 2. Results of basic water quality indicators after in-situ remediation

[0041]

[0042] Embodiment 2: The second group of washing bottles 1 includes three screw-mouth washing bottles 6. The openings above the three screw-mouth washing bottles 6 of the second group of washing bottles 1 are connected to the three air bags 2 pipelines respectively. The three screw-mouth washing bottles 6 of the second group of washing bottles 1 are arranged according to the black and odorous water body sludge ratio of 80%, the water ratio of 0%, and the material usage of 8% of the sludge. After the assembly is completed, the three screw-mouth washing bottles 6 are respectively treated in three ways: no composite material is added, the composite material is covered on the surface of the black and odorous water body, and the composite material and the black and odorous water body are mixed and added. After 30 days, The gas content in the air bag 2 was measured respectively, and the test results are shown in Table 3. According to the test results, it can be observed that the surface sediment of the screw-mouth washing bottle 6 without adding the composite material has almost no change and is still black; the surface sediment of the screw-mouth washing bottle 6 with the composite material placed above the black and smelly water body reacts quickly and gradually changes. After 30 days, a large amount of S single substance is precipitated in the micro-surface layer; the surface sediment of the screw-mouth washing bottle 6 with the composite material and the black and smelly water mixed is gradually reacting, and the micro-surface layer and the middle bottom mud are gradually changing, and S single substance is continuously precipitated during this period. It can be seen from the data in Table 3 that after 30 days, without adding any material, the measured H 2 S. NH 3 and N 2 O were 12.5mL, 8.5mL and 3.85mL respectively; after surface coverage and mixing with composite materials, H 2 S. NH 3 and N 2 The generation of O gas was significantly reduced, and the elimination efficiency of mixed addition reached 93.6%, 92.9% and 94.3% respectively.

[0043] Table 3. Gas generation and elimination effects during in situ remediation

[0044]

[0045] Embodiment 3: The third group, the washing bottle group 1, includes three screw-mouth washing bottles 6. The middle openings of the three screw-mouth washing bottles of the third group close to the water pump 3 are connected to the output end of the water pump 3 through a pipeline, and the input end of the water pump 3 is connected to the water tank 4 through a pipeline. A waste water tank is provided on the side of the water pump 3 away from the water tank 4. The upper openings of the three screw-mouth washing bottles 6 of the third group away from the water pump 3 are connected to the waste water tank pipeline. After assembly, the three screw-mouth washing bottles 6 of the third group are treated according to the black and odorous water body sludge ratio of 50%, the water ratio of 50%, and the material usage of 12% of the sludge. After assembly, the three screw-mouth washing bottles 6 are treated in three ways: no addition of composite materials, covering the surface of the black and odorous water body with composite materials, and mixing the composite materials with the black and odorous water body, and regularly observing the three reactions. The apparent changes of the water in the bottle and the bottom mud of the black and smelly water body were analyzed by collecting water samples after 10 days and 30 days respectively. The test results are shown in Table 4. According to the test results, it can be observed that the water above the screw-mouth washing bottle 6 without adding the composite material is still turbid, the transparency changes little, and the surface sediments have almost no change; the screw-mouth washing bottle 6 in which the composite material is placed above the black and smelly water body and the screw-mouth washing bottle 6 in which the composite material and the black and smelly water are mixed, after 10 days, the water above gradually becomes clear, the transparency is significantly improved, the surface sediments react quickly and gradually change, and a large amount of S single substance is precipitated in the micro-surface layer. After 30 days, with the continuous water discharge, the material and single substance S gradually flow out, the clarity of the water above is slightly reduced, and the S single substance in the surface sediments is gradually decreasing. From the data in Table 4, it can be seen that continuous water flow has a certain influence on the in-situ covering effect of black and odorous water body remediation, and as the continuous water flow time increases, the covering effect becomes slightly worse. Compared with the first group of washing bottle group 1, DO only increased from 1.75 mg / L to 4.55 mg / L after 30 days, which is significantly lower than 5.96 mg / L, and lower than 4.85 mg / L at 10 days. The conductivity EC also decreased significantly, which can be quickly reduced from 1406 μs / cm to 10.99 μs / cm, which is significantly higher than 8.25 μs / cm, and higher than 10.17 μs / cm at 10 days. 4 + The contents of -N, TN and TP as well as heavy metals Cd, Cr, Cu and Pb also showed a significant downward trend, and the overall change pattern was consistent with EC.

[0046] Table 4. Results of determination of basic water quality indicators and apparent phenomena during continuous water flow in situ remediation

[0047]

[0048] Embodiment 4: The fourth group of washing bottles 1 includes three screw-mouth washing bottles 6. The three screw-mouth washing bottles 6 of the fourth group are connected to three electric signal detection devices 5 respectively. After the connection is completed, samples are added to the three screw-mouth washing bottles 6 in accordance with the ratio of 45% of the sludge in the black and odorous water body, 55% of the water, and 10% of the amount of the composite material used in the sludge. The three screw-mouth washing bottles 6 are treated in three ways: no composite material is added, the composite material is covered on the surface of the black and odorous water body, and the composite material and the black and odorous water body are mixed and added. After the addition is completed, the samples are added to the three screw-mouth washing bottles 6 in 10 days and 30 days. After 30 days, the micro-current value was measured by the electric signal detection device 5. According to the experimental results, it can be observed that in the reaction bottle without adding materials, the upper water body is still turbid, the transparency changes little, and the surface sediments are almost unchanged; when the composite material surface is covered, the upper water body quickly becomes clear, the transparency is significantly improved, and the surface sediments react quickly. After 30 days, a large amount of S single substance is precipitated from the micro-surface layer; when the composite material is mixed and added, the upper water body gradually becomes clear, the transparency gradually improves, and the surface sediments gradually react, during which the micro-surface layer continuously precipitates S single substance. It can be seen from the data in Table 5 that compared with no material, surface covering and mixed addition, the electrons in the bottom mud layer of the black and odorous water body show different electron transfer efficiencies. The current values ​​measured after 10 days are 0.05, 13.27 and 9.85 mA, respectively, and the current values ​​measured after 30 days are 0.05, 8.64 and 6.22 mA, respectively.

[0049] Table 5. Results of electron transfer effect determination in the bottom mud layer of black and odorous water bodies during in-situ remediation

[0050]

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A monitoring device for in-situ remediation of black and odorous water bodies, characterized in that: The monitoring device comprises a gas washing bottle group (1), wherein the gas washing bottle group (1) comprises four groups, and the gas washing bottle group (1) comprises three screw-mouth gas washing bottles (6).

2. A monitoring device for in-situ remediation of black and odorous water bodies according to claim 1, characterized in that: The screw-mouth gas washing bottle (6) is provided with a scale, the screw-mouth gas washing bottle (6) is made of a transparent glass material, and three openings are provided on both sides of the screw-mouth gas washing bottle (6).

3. A monitoring device for in-situ remediation of black and odorous water bodies according to claim 1, characterized in that: The monitoring device further comprises an air bag (2), wherein there are three air bags (2), and the three air bags (2) are respectively connected to the open pipes above the three screw-mouth washing bottles (6) of the second group.

4. A monitoring device for in-situ remediation of black and odorous water bodies according to claim 1, characterized in that: The monitoring device further comprises a water pump (3) and a water tank (4); the water tank (4) is provided on one side of the water pump (3); a waste water tank is provided on the side of the water pump (3) away from the water tank (4); the input end of the water pump (3) is connected to a pipeline of the water tank (4); there are three water pumps (3); the output ends of the three water pumps (3) are respectively connected to the middle opening pipelines of three screw-mouth washing bottles (6) of the third group close to the water pump (3); the upper openings of the three screw-mouth washing bottles (6) of the third group away from the water pump (3) are connected to the waste water tank pipeline.

5. The monitoring device for in-situ remediation of black and odorous water bodies according to claim 1 is characterized in that: The monitoring device further comprises an electric signal detection device (5), wherein there are three electric signal detection devices (5), and the three electric signal detection devices (5) are respectively connected to the three screw-mouth washing bottles (6) of the fourth group, and the electric signal detection device (5) comprises a signal display device (51), a cathode conductive rod (52) and an anode conductive rod (53), wherein the cathode conductive rod (52) and the anode conductive rod (53) are placed in the connected screw-mouth washing bottles (6), and the cathode conductive rod (52) and the signal display device (51) are electrically connected, and the anode conductive rod (53) and the signal display device (51) are electrically connected.

6. A monitoring method based on the black and odorous water in-situ remediation monitoring device according to any one of claims 1 to 5, characterized in that: The monitoring method comprises the following steps: S1, placing the bottom mud of the black and smelly water body and water in a certain proportion into three screw-capped gas washing bottles (6) of the four gas washing bottle groups (1); S2, treating the three screw-mouth washing bottles (6) in each washing bottle group (1) respectively by three methods: not adding the composite material, covering the surface of the black and odorous water with the composite material, and mixing the composite material with the black and odorous water; S3. After the experiment starts, the first group of gas washing bottles (1) is not treated in any way; The second group of gas washing bottle group (1) and the gas bag (2) are connected by a pipeline, and the gas generated in the screw-mouth gas washing bottle (6) of the second group of gas washing bottle group (1) is collected through the gas bag (2); The third group of gas washing bottles (1) is connected to the water pump (3) through a pipeline, and the water pump (3) simulates the influence of continuous water flow on the experiment; The fourth gas washing bottle group (1) is connected to the electric signal detection device (5), and the electric signal detection device (5) detects the change of the electric signal; S4. Before starting the experiment, samples in the screw-capped gas washing bottles (6) in each gas washing bottle group (1) are sampled and tested to test the chemical parameters and physical parameters of the samples.

7. The monitoring method of the in-situ remediation monitoring device for black and odorous water bodies according to claim 6 is characterized in that: The composite material includes but is not limited to Fe / Mn bimetallic loaded natural zeolite composite material.

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