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

Abstract

The application discloses a kind of monitoring device and monitoring method for black and odorous water in-situ remediation, relating to water quality environmental monitoring technical field, a kind of monitoring device and monitoring method for black and odorous water in-situ remediation, it is convenient to directly observe and compare the apparent change of water quality, it is convenient to collect water and sediment sample, can real-time monitoring water apparent change and basic water quality index, sediment structure composition change, micro-ecological effect, oxidation-reduction potential, micro-current and voltage and other key indexes, clear the change condition of each pollutant in water and sediment in the process of black and odorous water in-situ remediation, simultaneously, select basic water quality and apparent change, gas generation and emission reduction, continuous water flow mode in-situ remediation process basic water quality index and apparent phenomenon change, sediment micro-current and voltage change in the process of remediation, can effectively evaluate the effect of different types of materials, in-situ remediation technology for repairing black and odorous water, it is convenient to quickly and efficiently screen repair material and remediation technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water quality environmental monitoring, and particularly relates to a monitoring device and a monitoring method for in-situ remediation of black and odorous water bodies. BACKGROUND

[0002] With the rapid advancement of industrialization and urbanization, a large amount of domestic sewage and industrial wastewater is directly discharged into the river without or incomplete treatment due to population aggregation, which causes serious environmental pollution and ecological damage to the river. Among them, nitrogen, phosphorus and organic matter in the river water body are seriously over-standard, which causes rapid consumption of dissolved oxygen in the water body, resulting in black and odorous phenomenon of the water body.

[0003] The remediation technology of black and odorous river water body and sediment is divided into in-situ and ex-situ two kinds. The ex-situ remediation technology refers to the ex-situ treatment of river sediment. The treatment effect is fast, but the actual application has large dredging engineering quantity, high treatment cost, large site demand, easy to cause secondary pollution and affect the ecological function of the river. The in-situ remediation technology refers to the in-situ remediation of contaminated mud and water in the river. Through the use of some environmentally friendly functional materials or microbial agents and the aid of some physical measures, the self-repairing function of the river is promoted to achieve the purpose of comprehensive treatment of black and odorous river.

[0004] At present, there are some in-situ remediation technologies for rivers using mineral materials covering, micro-nano aeration assisted microbial agents, etc. However, these technologies mainly focus on short-term changes in the appearance of the water body, and there is less long-term monitoring of water quality changes and investigation of the effect of the technologies used. Especially for different types of black and odorous water bodies, the actual application effect of materials and in-situ remediation technologies is quite different, and there is a lack of effective investigation methods and index evaluation system. Therefore, we propose a monitoring device and evaluation method for in-situ remediation of black and odorous water bodies. The water body appearance change, basic water quality index, gas emission, and sediment micro-current and voltage change are selected as the main indexes for remediation effect evaluation. An evaluation index system and evaluation method are established. Then, different combinations of in-situ remediation monitoring devices are built to monitor data and evaluate effects, so as to quickly and efficiently screen remediation materials and remediation technologies and optimize the related treatment system of black and odorous water bodies. SUMMARY

[0005] The present application aims to provide a monitoring device and a monitoring method for in-situ remediation of black and odorous water bodies to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

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

[0008] By setting four groups of washing bottles and each group including three screw neck washing bottles, a contrast experiment can be established, and the parameter changes of the black and odorous water under different treatment methods can be effectively compared, and the accuracy of the experimental results is increased.

[0009] Further, the screw neck washing bottles are provided with scales, and the screw neck washing bottles are made of transparent glass material, and the two sides of the screw neck washing bottles are provided with three openings.

[0010] By using the screw neck washing bottles made of transparent material, the changes of the color, volume and other physical parameters of the experimental samples can be observed at any time, and the multiple openings are provided for collecting and adding materials.

[0011] Further, the monitoring device further comprises three gas bags, and the three gas bags are respectively connected with the upper opening pipelines of the three screw neck washing bottles in the second group.

[0012] By setting the gas bags, all the gases generated in the three screw neck washing bottles in the second group during the experiment can be collected, and the subsequent detection of the gases is facilitated.

[0013] Further, the monitoring device further comprises a water pump and a water tank, the water pump is provided with the water tank on one side, and the water pump is provided with a wastewater tank on the side away from the water tank, the input end of the water pump is connected with the pipeline of the water tank, and the water pump has three output ends.

[0014] By pumping the water in the water tank out through the water pump, the water pumped out is sent into the screw neck washing bottles through the openings of the connected screw neck washing bottles, and the water level in the screw neck washing bottles is lifted by the water pumped out by the water pump until the water level is lifted to be flush with the opening connected with the wastewater tank, and then the excess water is sent to the wastewater tank through the opening connected with the wastewater tank, so that the influence of flowing water on the experiment is simulated.

[0015] Further, the monitoring device further comprises three electric signal detection devices, and the three electric signal detection devices are respectively connected with the three screw neck washing bottles in the fourth group.

[0016] By connecting the three electric signal detection devices with the three screw neck washing gas bottles of the fourth group respectively, the electric signal of the three screw neck washing gas bottles can be monitored at the same time, so that the accuracy of the experimental results is ensured, and by placing the cathode conductive rod and the anode conductive rod into the screw neck washing gas bottles, the content of the conductive ion in the washing gas bottle can be detected, the more the content of the conductive ion, the better the conductive effect, and the change of the conductive ion in the experimental process is reflected according to the conductive effect, so that the effect is reflected.

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

[0018] S1, the black and odorous water body and water are placed in three screw neck washing gas bottles of four groups of washing gas bottle groups according to different proportions;

[0019] S2, three screw neck washing gas bottles in each washing gas bottle group are treated by three ways of not adding composite materials, covering the composite materials on the surface of the black and odorous water body and mixing the composite materials with the black and odorous water body respectively;

[0020] S3, after starting the experiment, the first group of washing gas bottle groups is not treated;

[0021] The second group of washing gas bottle groups is connected with the gas bag pipeline, and the gas generated in the screw neck washing gas bottles of the second group of washing gas bottle groups is collected through the gas bag;

[0022] The third group of washing gas bottle groups is connected with the water pump pipeline, and the influence of the continuous water flow on the experiment is simulated through the water pump;

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

[0024] S4, before starting the experiment, the samples in the screw neck washing gas bottles of each group of washing gas bottle groups are sampled and detected, the chemical parameters and physical parameters of the samples are detected, and after starting the experiment, the samples are sampled and detected again according to the requirement.

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

[0026] By adding active metals as materials, other ions in the black and odorous water body can be replaced out, and the repair of the black and odorous water body is facilitated.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] 1, four groups of washing gas bottle groups can monitor the apparent change of the overlying water, the basic water quality index, the change of the structure composition of the sediment, the micro-ecological effect, the oxidation-reduction potential, the micro-current and the voltage and other key indexes, and the change of each pollutant in the water body and the sediment in the in-situ repair process of the black and odorous water body is determined.

[0029] 2. The gas washing bottle is provided with multiple water inlets and mud outlets, the physical index change conditions of the bottom mud and the overlying water color and state can be directly observed through the transparent bottle body, and there are multiple combination modes, so that the gas washing bottle is easy to build, and can be easily modified and enlarged according to needs.

[0030] 3. The river health evaluation method for restoring the ecological promotion and self-repairing function of the black and odorous water body can be established based on the water quality and pollutant index, the inhibition and release of black and odorous substances, the structure characteristics of the bottom mud and the characteristics of the microbial population. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a first group of gas washing bottle group structure schematic view of the application.

[0032] Figure 2 It is a second group of gas washing bottle group structure schematic view of the application.

[0033] Figure 3 It is a third group of gas washing bottle group structure schematic view of the application.

[0034] Figure 4 It is a fourth group of gas washing bottle group structure schematic view of the application.

[0035] In the figure: 1, gas washing bottle group; 2, gas 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 gas washing bottle. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0037] Example 1: The first group of washing bottles group 1, the first group of washing bottles group 1 includes three screw neck washing bottles 6, the bottom mud and water in the black and odorous water body are put into the three screw neck washing bottles 6 of the first group of washing bottles group 1 according to the black and odorous water body bottom mud ratio of 40%, the water ratio of 60%, the composite material usage amount of 10% of the bottom mud amount, then part of the sample is taken out, the original sample is detected physically and chemically, the detection results are shown in Table 1, finally, three screw neck washing bottles 6 are treated in three ways of not adding composite material, covering composite material on the surface of black and odorous water body and mixing and adding composite material and black and odorous water body, then the sample added with composite material is detected again on the 30th day, the detection results are shown in Table 2, according to the experimental phenomenon, it can be observed that the water body part of the screw neck washing bottle 6 without adding composite material is turbid, the transparency changes little, and the surface sediment changes little; the water body of the screw neck washing bottle 6 treated by covering the composite material on the surface of the black and odorous water body is quickly clarified, the transparency is significantly improved, the surface sediment reacts rapidly and gradually changes, and a large amount of S single element is precipitated in the micro-layer after 30 days; the water body of the screw neck washing bottle 6 treated by mixing and adding the composite material and the black and odorous water body is gradually clarified, the transparency is gradually improved, the surface sediment gradually reacts, and S single element is continuously precipitated in the micro-layer during the period. From the data in Table 2, it can be compared that the water body pH is increased from 7.13 to 8.01 and 7.54 respectively; DO is increased from 1.75 mg / L to 5.96 mg / L and 5.01 mg / L respectively; the conductivity EC is significantly reduced, which can be rapidly reduced from 1406 μs / cm to 8.25 μs / cm and 9.08 μs / cm respectively; the contents of nutrient sources TOC, NH4 + -N, TN and TP and heavy metals Cd, Cr, Cu and Pb also show a significant downward trend, and overall, under the condition of the same material amount, the surface coverage appearance and water quality change are better than the mixed addition.

[0038] Table 1. Basic water quality index determination results of original sample

[0039]

[0040] Table 2. Basic water quality index determination results after in-situ repair

[0041]

[0042] Example 2: The second group of washing bottle group 1 includes three screw neck washing bottles 6, the openings above the three screw neck washing bottles 6 of the second group of washing bottle group 1 are respectively in pipeline communication with the three gas bags 2, the three screw neck washing bottles 6 of the second group of washing bottle group 1 are treated according to the following 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 is mixed with the black and odorous water body and added, the proportion of the black and odorous water body sediment is 80%, the proportion of water is 0%, the material usage is 8% of the amount of sediment, after assembly, the three screw neck washing bottles 6 are respectively treated in the three ways, after 30 days, the content of the gas in the gas bag 2 is measured, the detection results are shown in Table 3, according to the detection results, it can be observed that the surface sediment of the screw neck washing bottle 6 without adding the composite material has almost no change and is still black; the surface sediment of the screw neck washing bottle 6 with the composite material placed above the black and odorous water body reacts rapidly and gradually changes, a large amount of S single element is precipitated in the micro-surface after 30 days; the surface sediment of the screw neck washing bottle 6 with the composite material mixed with the black and odorous water body and added gradually reacts, the micro-surface and the intermediate sediment are gradually changed, and S single element is continuously precipitated during the period. From the data in Table 3, it can be seen that after 30 days, without adding any material, the generated H2S, NH3 and N2O are respectively 12.5 mL, 8.5 mL and 3.85 mL; after the surface is covered and the composite material is mixed and added, the generation amount of H2S, NH3 and N2O gas is obviously reduced, and the elimination efficiency of the mixed addition respectively reaches 93.6%, 92.9% and 94.3%.

[0043] Table 3. Generation and elimination effect of gas in the in-situ repair process

[0044]

[0045] Example 3: the third group, the gas washing bottle group 1, including three screw neck gas washing bottles 6, the middle part of the three screw neck gas washing bottles of the third group is communicated with the output pipeline of the water pump 3 on the side close to the water pump 3, the input end of the water pump 3 is communicated with the water tank 4, the side of the water pump 3 away from the water tank 4 is provided with a waste water tank, the upper opening of the three screw neck gas washing bottles 6 of the third group away from the water pump 3 is communicated with the waste water tank, after the assembly is completed, the three screw neck gas washing bottles 6 of the third group are treated according to three ways that no composite material is added, the composite material is covered on the surface of the black and odorous water body and the composite material is mixed with the black and odorous water body, the apparent changes of the water body and the black and odorous water body sediment in the three reaction bottles are observed regularly, after 10 days and 30 days, the water body samples are collected respectively for detection, the detection results are shown in Table 4, according to the detection results, it can be observed that the screw neck gas washing bottle 6 without adding the composite material, the upper water body still shows the turbidity phenomenon, the transparency changes little, and the surface sediment almost has no change; the screw neck gas washing bottle 6 with the composite material placed on the upper part of the black and odorous water body and the screw neck gas washing bottle 6 with the composite material and the black and odorous water body mixed, after 10 days, the upper water body gradually clarifies, the transparency significantly improves, the surface sediment rapidly reacts and gradually changes, a large amount of S element is separated from the micro-surface layer, after 30 days, with the continuous water flow, the material and the S element gradually flow out, the clarity of the upper water body slightly decreases, and the S element of the surface sediment gradually decreases. From the data in Table 4, it can be seen that the continuous water flow has a certain influence on the in-situ covering effect of the black and odorous water body, and the longer the time of the continuous water flow, the worse the covering effect is. Compared with the first group of gas washing bottle group 1, after 30 days, the DO is only increased from 1.75 mg / L to 4.55 mg / L, which is obviously lower than 5.96 mg / L, and lower than 4.85 mg / L after 10 days, the conductivity EC also significantly decreases, which can be rapidly reduced from 1406 μs / cm to 10.99 μs / cm, which is obviously higher than 8.25 μs / cm, and higher than 10.17 μs / cm after 10 days. The contents of the nutrient sources TOC, NH4 + -N, TN and TP and heavy metals Cd, Cr, Cu and Pb in the water body also show a significant downward trend, and the overall change rule is consistent with EC.

[0046] Table 4. Determination results of basic water quality indexes and apparent phenomena in the process of in-situ repair of continuous water flow

[0047]

[0048] Example 4: The fourth group of gas washing bottles group 1 includes three screw gas washing bottles 6, the three screw gas washing bottles 6 of the fourth group are connected with three electric signal detection devices 5 respectively, after the connection is completed, the three screw gas washing bottles 6 are added with samples in turn according to the proportion that the black and odorous water body sediment accounts for 45%, the water accounts for 55%, and the composite material accounts for 10% of the amount of sediment, three ways of not adding composite material, covering the composite material on the surface of the black and odorous water body and mixing and adding the composite material and the black and odorous water body are made to the three screw gas washing bottles 6 respectively, after the addition is completed, the micro-current value is measured by the electric signal detection device 5 after 10 days and 30 days, according to the experimental results, it can be observed that in the reaction bottle without adding material, the upper water body is still turbid, the transparency changes little, and the surface sediment almost does not change; when the surface of the composite material is covered, the upper water body becomes clear quickly, the transparency improves significantly, the surface sediment reacts quickly, and a large amount of S single element is precipitated in the micro-layer after 30 days; when the composite material is mixed and added, the upper water body gradually becomes clear, the transparency gradually improves, and the surface sediment gradually reacts, and S single element is continuously precipitated in the micro-layer during the period. From the data in Table 5, it can be seen that compared with not adding material, surface covering and mixed addition, the black and odorous water body sediment layer electrons present different electron transfer efficiency, 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. Determination results of black and odorous water body sediment layer electron transfer effect during in-situ repair process

[0050]

[0051] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than by the foregoing description, and it is intended that all changes that come within the meaning and range of equivalency of the claims are embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

Claims

1. A monitoring device for in-situ remediation of black and odorous water bodies, characterized in that: The monitoring device includes a gas washing bottle group (1), which has four groups and includes three screw-type gas washing bottles (6). The screw-top gas washing bottle (6) is provided with a scale. The screw-top gas washing bottle (6) is made of transparent glass material. The screw-top gas washing bottle (6) has three openings on both sides. The monitoring device also includes three air bags (2), and the three air bags (2) are respectively connected to the opening pipes above the three screw-type gas washing bottles (6) of the second group; The monitoring device also includes a water pump (3) and a water tank (4). The water tank (4) is provided on one side of the water pump (3), and a wastewater 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 the water tank (4) via a pipe. There are three water pumps (3). The output ends of the three water pumps (3) are respectively connected to the middle opening pipes of the three screw-type gas washing bottles (6) of the third group near the water pump (3). The upper opening of the three screw-type gas washing bottles (6) of the third group away from the water pump (3) is connected to the wastewater tank via a pipe. The monitoring device also includes an electrical signal detection device (5). There are three electrical signal detection devices (5). The three electrical signal detection devices (5) are respectively connected to the three screw-type gas washing bottles (6) of the fourth group. The electrical signal detection device (5) includes a signal display device (51), a cathode conductive rod (52) and an anode conductive rod (53). The cathode conductive rod (52) and the anode conductive rod (53) are placed inside the connected screw-type gas washing bottles (6). The cathode conductive rod (52) is electrically connected to the signal display device (51), and the anode conductive rod (53) is electrically connected to the signal display device (51).

2. A monitoring method based on the monitoring device for in-situ remediation of black and odorous water bodies as described in claim 1, characterized in that: The monitoring method includes the following steps: S1. Put the black and odorous water body bottom sediment and water into the three screw-top gas washing bottles (6) of the four sets of gas washing bottle group (1) in a certain proportion; S2. For each group of gas washing cylinders (1), the three screw-top gas washing cylinders (6) are treated in three ways: without adding composite material, covering the surface of the black and odorous water body with composite material, and mixing the composite material with the black and odorous water body. S3. After the experiment begins, the first group of gas washing bottles (1) is not treated in any way. The second set of gas washing bottle group (1) and gas bag (2) are connected by pipes, and the gas generated in the screw-top gas washing bottle (6) of the second set of gas washing bottle group (1) is collected through the gas bag (2); The third group of gas washing bottles (1) and water pump (3) are connected by pipes, and the effect of continuous water flow on the experiment is simulated by water pump (3); The fourth set of gas washing bottles (1) is connected to the electrical signal detection device (5), and the change of electrical signal is detected by the electrical signal detection device (5); S4. Before starting the experiment, samples were taken from the screw-top gas washing bottles (6) in each gas washing bottle group (1) to test the chemical and physical parameters of the samples.

3. The monitoring method according to claim 2, characterized in that: The composite material includes Fe / Mn bimetallic supported natural zeolite composite material.

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