Underwater suspension in-situ biological denitrification device

Abstract

The utility model provides an underwater suspension in-situ biological denitrification device which is used for observing the consumption condition of a denitrification material and is characterized by comprising a buoy, the denitrification material, a fiber bag and a counter weight, the fiber bag is filled with a denitrification material and is used for denitrifying the water body; the top of the fiber bag is connected with the buoy through a lifting rope and floats on a water body, and the bottom of the fiber bag is connected with the counter weight; the buoy is arranged on a water body, and a scale is arranged on the buoy and used for recording the depth of the fiber bag connected to the bottom of the buoy in the water body; wherein the fiber bag is formed by weaving fiber cloth, and long fluff is densely distributed outside the fiber bag and is used for adsorption and growth of microorganisms. According to the utility model, the consumption condition of the denitrification material can be effectively observed, the denitrification rate in the water body can be conveniently known by combining nitrogen balance in the water body, and the denitrification material in the denitrification device can be timely supplemented.

Description

Technical Field

[0001] The utility model belongs to the technical field of water environment pollution control, and specifically relates to an underwater suspended in-situ biological denitrification device. Background Art

[0002] As my country continues to strengthen environmental governance, the quality of surface water in the country has improved significantly, with the proportion of Class I-III water bodies increasing from 29.1% in 2002 to 87.9% in 2022. However, the 2022 Ecological and Environmental Bulletin shows that the proportion of important lakes and reservoirs in eutrophication is still as high as 30%, and has increased slightly compared with 2021. As water sources, important lakes and reservoirs urgently need to be eutrophicated.

[0003] The main pollutants that cause eutrophication of water bodies are nitrogen and phosphorus. Phosphorus can be quickly removed by chemicals, but nitrogen can only be converted into nitrogen gas and released into the air by microorganisms. Due to the micro-pollution of nitrogen in some water sources, some water plants must install denitrification pretreatment units to meet the water quality standards of the water plants. Therefore, effectively removing nitrogen from eutrophic water bodies has become a key issue in water management.

[0004] The existing water body denitrification methods are mainly divided into bypass treatment, shore in-situ denitrification equipment (such as the authorization announcement number CN105712497 B), water body in-situ slow-release carbon source placement device (such as the authorization announcement number CN 209024278 U), etc. However, the bypass treatment method requires a large amount of land and deployment of operation and maintenance personnel; the shore in-situ denitrification equipment must be equipped with a release pipe network in the water body to ensure the efficient utilization of denitrification microorganisms; the water body in-situ slow-release carbon source placement device only considers the effective release of the slow-release carbon source, but does not consider the effective utilization of the slow-release carbon source by the target microorganisms, and cannot effectively judge the consumption of the slow-release carbon source. Utility Model Content

[0005] The utility model aims to provide a device which can observe the consumption of denitrification materials and carry out denitrification under water.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An underwater suspended in-situ biological denitrification device is used to observe the consumption of denitrification materials, characterized in that it includes a buoy, denitrification materials, a fiber bag and a counterweight; the fiber bag is filled with denitrification materials for denitrifying the water body; the top of the fiber bag is connected to the buoy by a suspension rope and floats on the water body, and the bottom of the fiber bag is connected to the counterweight; the buoy is set on the water body, and the buoy is provided with a ruler with scales engraved on it for observing the consumption rate of the denitrification material; wherein the fiber bag is woven from fiber cloth, and the outside of the fiber bag is densely covered with long fluff for the adsorption and growth of microorganisms.

[0008] Preferably, the fiber bag is provided with an opening, which is opened and closed by a stainless steel zipper, and the denitrification material is placed in the fiber bag through the opening and is confined in the fiber bag by the stainless steel zipper.

[0009] Preferably, the bottom of the fiber bag is connected to the counterweight via a soft rope; the weight of the counterweight is greater than the sum of the weights of the fiber bag and the denitrification material, and less than the sum of the weights of the buoy, the fiber bag and the denitrification material.

[0010] Preferably, a bold boundary is provided at the bottom of the scale on the buoy, and the bold boundary is used to indicate the consumption status of the denitrification material in the fiber bag.

[0011] Preferably, the pore size of the fiber cloth is 5-15 μm, which facilitates the release of the denitrification material and prevents impurities or microorganisms in the water body from flowing back into the fiber bag.

[0012] Preferably, the accuracy of the scale is 0.5 cm, which is used to further observe the consumption rate of the denitrification material.

[0013] Preferably, the length of the long villi is 2-3 cm to avoid causing an anaerobic state inside the microorganisms on the villi, and the material of the long villi is hydrophilically modified polypropylene.

[0014] Preferably, the diameter-to-height ratio of the fiber bag is 0.1-0.3:1.

[0015] Preferably, the amount of the denitrification material filled in the fiber bag is 10-30 kg.

[0016] Preferably, the length of the sling is 10-20 cm.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The utility model uses a buoy and a counterweight to place the denitrification material wrapped in a fiber bag at a specified water depth, and utilizes the material structure on the outer surface of the fiber bag that is conducive to the attachment and growth of microorganisms and the denitrification material inside the fiber bag to enrich the denitrification microorganisms on the surface of the fiber bag, thereby efficiently removing nitrogen from the water.

[0019] (2) The utility model can understand the consumption rate of the denitrification material through the change of the scale mark on the buoy. When the scale mark reaches a specified low level, it indicates that the denitrification material has been consumed and the denitrification material can be replenished again.

[0020] (3) The utility model has a practical and simple structure, realizes the function of efficient nitrogen removal at a specified depth of the water body, and can simultaneously observe the consumption of denitrification materials.

[0021] (4) The utility model can effectively observe the consumption of denitrification materials, and combined with the nitrogen balance in the water body, it is convenient to understand the denitrification rate in the water body and replenish the denitrification materials in the denitrification device in time.

[0022] (5) The utility model can carry out the water body denitrification process at a specific water depth and has strong regional targeted nitrogen removal performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of an underwater suspended in-situ biological denitrification device provided in an embodiment of the utility model;

[0024] Figure 2 A schematic structural diagram of a fiber cloth in an underwater suspended in-situ biological denitrification device provided in an embodiment of the utility model.

[0025] The serial numbers in the figure are as follows:

[0026] 1. Buoy; 2. Ruler; 3. Lifting rope; 4. Stainless steel zipper; 5. Denitrification material; 6. Fiber bag; 7. Soft rope; 8. Counterweight; 9. Fiber cloth; 10. Long pile; 11. Inside; 12. Outside; 13. Bold boundary. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Figure 1 A schematic structural diagram of an underwater suspended in-situ biological denitrification device provided in an embodiment of the utility model.

[0029] like Figure 1As shown, an underwater suspended in-situ biological denitrification device disclosed in the utility model is used to observe the consumption of denitrification materials, including a buoy 1, denitrification materials 5, a fiber bag 6 and a counterweight 8.

[0030] The fiber bag 6 is woven from fiber cloth 9, and the outside of the fiber bag 6 is densely covered with long fluff 10 for microbial adsorption and growth. The fiber bag 6 is provided with an opening, which is opened and closed by a stainless steel zipper 4. The denitrification material 5 is filled into the fiber bag 6 through the opening and is confined in the fiber bag 6 by the stainless steel zipper 4, so as to denitrify the water body.

[0031] Furthermore, in this embodiment, the denitrification material 5 is a slow-release material, and the slow-release rate is determined by the degree of water pollution and the service area, with an average daily consumption rate of 0.6%-1.8%. The amount of denitrification material 5 built into the fiber bag 6 is related to the degree of water pollution and the size of the service area, as well as the frequency of supplementary filling. Generally, the filling amount is 10-30kg, and the supplementary filling cycle is generally 2-6 months.

[0032] The top of the fiber bag 6 is connected to the buoy 1 by a suspension rope 3 and floats on the water body. The buoy 1 is provided with a ruler 2, which is engraved with scales with an accuracy of 0.5 cm, and is used to observe the consumption rate of the denitrification material 5. The consumption rate of the denitrification material can be understood by the change of the scale on the buoy. When the scale reaches the specified low scale, it indicates that the denitrification material has been consumed and the denitrification material can be replenished again.

[0033] The bottom of the fiber bag 6 is connected to the weight 8 through a soft rope 7; the weight 8 at the bottom matches the weight of the denitrification material 5 and the fiber bag 6 under different working conditions to ensure that the utility model is in a floating state. Generally, the density of the lower device of the buoy 1 is kept at 1.01-1.05g / cm 3 The buoy 1 can be positioned at a specific plane position of the water body or float on the water body along with the water flow.

[0034] Furthermore, in this embodiment, a bold boundary 13 is provided at the bottom of the scale of the scale 2 on the buoy 1 , and the bold boundary 13 is used to indicate and observe the consumption state of the denitrification material 5 in the fiber bag 6 .

[0035] Figure 2 A schematic structural diagram of a fiber cloth in an underwater suspended in-situ biological denitrification device provided in an embodiment of the utility model.

[0036] like Figure 2As shown, further, in this embodiment, the pore size on the fiber cloth 9 is 5-15μm, and the average pore size is 10μm, which is convenient for the release of the denitrification material 5, and at the same time prevents impurities or microorganisms in the water body from flowing back into the fiber bag 6 to pollute the denitrification material or hinder the release of the denitrification material. The inner side 11 of the fiber bag 6 is used to fill the denitrification material 5, and the outer side 12 thereof is distributed with fine long villi 10, which is conducive to the adsorption and growth of microorganisms. The length of the villi should be 2-3cm; too long is not conducive to diffusion, and avoids causing the internal anaerobic state of the microorganisms on the villi. The filler with a high release rate should have a lower limit value. The material is hydrophilic modified polypropylene, which has good microbial biofilm properties.

[0037] This embodiment uses buoys and counterweights to place the denitrification material wrapped in the fiber bag at a specified water depth in the water body, and utilizes the material structure on the outer surface of the fiber bag that is conducive to the attachment and growth of microorganisms and the denitrification material inside the fiber bag to enrich the denitrification microorganisms on the surface of the fiber bag and efficiently remove nitrogen in the water body.

[0038] Furthermore, in the present embodiment, the diameter-to-height ratio of the fiber bag 6 is 0.1-0.3:1, and a larger value is preferably used for shallow water depths.

[0039] Furthermore, in this embodiment, the amount of denitrification material 5 filled in the fiber bag 6 is 10-30 kg.

[0040] Furthermore, in this embodiment, the length of the hanging rope 3 is determined according to the designated denitrification depth area of ​​the water body. The sum of the lengths of the hanging rope 3 and the fiber bag 6 should be less than the minimum water depth of the water body, and the length of the hanging rope 3 is preferably 10-20 cm.

[0041] The utility model uses a buoy and a counterweight to place the denitrification material wrapped in a fiber bag at a specified depth of the water body, and utilizes the material structure of the outer surface of the fiber bag that is conducive to the attachment and growth of microorganisms and the denitrification material inside the fiber bag to enrich the denitrification microorganisms on the surface of the fiber bag and efficiently remove nitrogen in the water body. The consumption rate of the denitrification material can be understood by the change of the scale on the buoy. When the scale reaches the specified low scale, it indicates that the denitrification material has been consumed and the denitrification material can be replenished again. The utility model has a practical and simple structure, realizes the function of efficient nitrogen removal at a specified depth of the water body, and can simultaneously observe the consumption of the denitrification material.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An underwater suspended in-situ biological denitrification device for observing denitrification material consumption, characterized in that: It comprises a buoy (1), a denitrification material (5), a fiber bag (6) and a weight (8); The fiber bag (6) is filled with a denitrification material (5) for denitrifying the water body; the top of the fiber bag (6) is connected to the buoy (1) via a suspension rope (3) so as to float on the water body, and the bottom of the fiber bag (6) is connected to the counterweight (8); The buoy (1) is arranged on a water body, and a scale (2) is arranged on the buoy (1), and a scale (2) is engraved with scales for observing the consumption rate of the denitrification material (5); The fiber bag (6) is woven from fiber cloth (9), and the outside of the fiber bag (6) is densely covered with long fluff (10) for the adsorption and growth of microorganisms.

2. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The fiber bag (6) is provided with an opening, which is opened and closed by a stainless steel zipper (4); the denitrification material (5) is placed in the fiber bag (6) through the opening and is confined in the fiber bag (6) by the stainless steel zipper (4).

3. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The bottom of the fiber bag (6) is connected to the counterweight (8) via a soft rope (7); the counterweight (8) matches the weight of the denitrification material (5) and the fiber bag (6) under different working conditions to ensure that the device is in a floating state.

4. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: A bold boundary (13) is provided at the bottom of the scale (2) on the buoy (1), and the bold boundary (13) is used to indicate the consumption status of the denitrification material (5) in the fiber bag (6).

5. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The pore size of the fiber cloth (9) is 5-15 μm, which facilitates the release of the denitrification material (5) and prevents impurities or microorganisms in the water body from flowing back into the fiber bag (6).

6. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The accuracy of the scale is 0.5 cm, which is used to further observe the consumption rate of the denitrification material (5).

7. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The length of the long villi (10) is 2-3 cm, so as to avoid the microorganisms on the villi from being in an anaerobic state. The material of the long villi (10) is hydrophilically modified polypropylene.

8. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The diameter-to-height ratio of the fiber bag (6) is 0.1-0.3:

1.

9. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The filling amount of the denitrification material (5) in the fiber bag (6) is 10-30 kg.

10. The underwater suspended in-situ biological denitrification device according to claim 1, characterized in that: The length of the suspension rope (3) is 10-20 cm.

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