Device for increasing pH value of mine acid wastewater

Abstract

The utility model discloses a device for increasing the pH value of mine acid wastewater, relates to the technical field of water pollution treatment, and aims to adapt to in-situ microbiological treatment of the mine acid wastewater. The device comprises a feeding unit, a biological membrane unit and a water pump, an upper end cover of the feeding unit is provided with a stirring paddle, a stirring part extends into a container, and the upper end cover is also provided with a plurality of vent holes; an annular filter device is arranged in the middle of the biological membrane unit, the periphery of the annular filter device is filled with a biofilm formation elastic filler, and an aeration device is arranged in the biological membrane unit and used for providing aeration bubbles for the biofilm formation elastic filler; the middle of one side of the feeding unit is communicated to the periphery of the filtering device of the biological membrane unit through a communication pipeline system, a water inlet pipe is arranged in the filtering device to be connected with a water suction port of a water pump, and a water outlet is connected back to the feeding unit through a water outlet pipe; the device is simple and reasonable in structure, easy to use and capable of remarkably increasing the pH value of the mine acid wastewater.

Description

Technical Field

[0001] The utility model relates to the technical field of water pollution treatment, in particular to a device for increasing the pH value of acidic mine wastewater. Background Art

[0002] In recent years, microbial methods have been widely used in the field of wastewater treatment due to their advantages of being economical, safe, and free of secondary pollution. Generally, this method uses the properties of certain microorganisms (such as adsorption of heavy metals) to treat wastewater.

[0003] However, the introduction of exogenous microorganisms can potentially contaminate in-situ water quality. Furthermore, microbial treatment methods suffer from long reaction times. Therefore, to circumvent the potential risks of exogenous microorganisms, long reaction times, and the problem of microbial loss, a device suitable for in-situ microbial treatment is needed. Therefore, a device for increasing the pH of acidic mine drainage is urgently needed to address this issue. Utility Model Content

[0004] The purpose of the utility model is to provide a device for increasing the pH value of acid mine wastewater to adapt to in-situ microbial treatment of acid mine wastewater.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for increasing the pH value of acidic mine wastewater, comprising a feeding unit, a biofilm unit and a water pump, the feeding unit being composed of a container for adding acidic mine wastewater and nutrients, the upper end cover of which is equipped with a stirring paddle and the stirring part extends into the container, and the upper end cover is also provided with a plurality of ventilation holes; an annular filtering device is provided in the middle of the biofilm unit, the outer periphery of which is filled with biofilm elastic filler, and an aeration device is provided inside the biofilm unit for providing aeration bubbles to the biofilm elastic filler at various locations; the middle part of one side of the feeding unit is connected to the outer periphery of the filtering device of the biofilm unit through a connecting pipe system, the inside of the filtering device is provided with a water inlet pipe connected to the water suction port of the water pump, and its water outlet is connected back to the feeding unit through a water outlet pipe.

[0006] Preferably, the communicating pipe system includes a plurality of movable units connected in series between the feeding unit and the biofilm unit, and the structure thereof is the same as that of the feeding unit, and is used to increase the wastewater treatment capacity of a single cycle.

[0007] Preferably, the device is further provided with a pH meter, the measuring end of which is arranged in the filtering device for real-time detection of the pH value of the treated wastewater.

[0008] Preferably, a three-way solenoid valve is connected to the water outlet pipe, one water outlet of which is connected to the feeding unit, and the other water outlet is connected to a collection container for temporarily storing treated wastewater that meets the pH standard.

[0009] Preferably, the material of the biofilm elastic filler is polypropylene, and the structure is radial fiber bundles.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The device for increasing the pH value of acidic mine wastewater has a simple and reasonable structure and is easy to implement. It can significantly increase the pH value of acidic mine wastewater to above neutral after simple treatment, and the method of use is simple.

[0012] 2. The device for increasing the pH value of acid mine wastewater utilizes in-situ microorganisms in the wastewater to intercept the grown microorganisms on the biofilm elastic filler, gradually forming a biofilm, and can continuously treat the acid mine wastewater by utilizing the action of microorganisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 Graph showing pH changes in the experimental and control groups in the examples of the present invention.

[0015] In the figure: 1. Feeding unit; 2. Activity unit; 3. Biofilm unit; 4. Water pump; 5. Agitator; 6. Vent; 7. Filter device; 8. Aeration bubbles; 9. Biofilm elastic filler. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, a device for increasing the pH value of acid mine wastewater includes a feeding unit 1, a biofilm unit 3, and a water pump 4. The feeding unit 1 is composed of a container for adding acid mine wastewater and nutrients. The upper end cover is equipped with a stirring paddle 5 with a stirring portion extending into the container. The upper end cover is also provided with multiple ventilation holes 6. An annular filter device 7 is provided in the middle of the biofilm unit 3. The outer periphery of the filter device 7 is filled with a biofilm elastic filler 9 to allow the biofilm to remain outside the filter device 7. For reference, the biofilm elastic filler 9 can be made of polypropylene and can be constructed of radial fiber bundles or a mesh structure. An aeration device is provided inside the biofilm unit 3 to provide aeration bubbles 8 to the biofilm elastic filler 9 at various locations. The aeration device can generally be fixedly installed at the bottom of the biofilm unit 3. The middle part of one side of the feeding unit 1 is connected to the outer periphery of the filter device 7 of the biofilm unit 3 through a connecting pipe system. The filter device 7 is provided with an inlet pipe connected to the water suction port of the water pump 4, and its outlet is connected back to the feeding unit 1 through an outlet pipe.

[0017] To increase the total wastewater treatment capacity per cycle, refer to Figure 1In the communicating pipe system, a plurality of movable units 2 connected in series between the feeding unit 1 and the biofilm unit 3 can be further provided as needed, and the structure thereof is the same as that of the feeding unit 1 .

[0018] In order to facilitate real-time detection of the pH value of the treated wastewater, the device can also be provided with a pH meter, the measuring end of which is arranged in the filter device 7; the wastewater with a pH value that meets the standard after treatment can be used for other subsequent treatment steps, such as removing Mn contained therein. For reference, a three-way solenoid valve can be connected to the outlet pipe, one of which is connected to the feeding unit 1, and the other is connected to the collection container. When the pH meter measurement value meets the standard, for example, greater than 8, the outlet direction of the solenoid valve can be adjusted to transfer the outlet water to the collection container for temporary storage of the treated wastewater with a pH value that meets the standard.

[0019] During use: Nutrients and acid mine drainage are added to the feed unit and the reaction begins. The in-situ microorganisms in the acid mine drainage can fully utilize the added nutrients and grow rapidly. A thick biofilm will grow on the biofilm unit's elastic filler. The detached biofilm will be trapped in the biofilm unit by the filter device. After a cycle of reaction, the pH of the acid mine drainage will rise to a higher level. Depending on the pH level, the device can be continuously injected with acid mine drainage to be treated or supplemented with nutrients.

[0020] Example:

[0021] Taking the acidic wastewater from a mine in Anhui as an example, 30L of wastewater was taken and its pH was measured to be about 3.2. The wastewater was divided into two equal parts. One part was added with 90g of modified Martin medium and 60g of peptone (generally fine-tuned according to the in situ microbial conditions), and the feeding unit in the above-mentioned method was added; the other part was used as a blank control, and the pH changes of the experimental group and the control group were monitored during the treatment process.

[0022] from Figure 2 It can be seen that the pH of the control group's acid water did not change significantly without any treatment, while the pH of the experimental group with added nutrients began to rise on the second day. By the seventh day, the pH of the wastewater reached neutral conditions, and then continued to rise. By the 20th day of monitoring, the pH could rise to 8.58.

[0023] The wastewater in the experimental group was pumped out of the device and temporarily stored for other treatment. The device of the above experimental group was continued to be used to treat the acidic wastewater of the mine. Since the biofilm unit had completed the biofilm formation, the pH could be increased faster.

[0024] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims.

[0025] Anything not described in detail in the present invention is well known to those skilled in the art.

Claims

1. A device for increasing the pH value of acid mine wastewater, characterized by: The invention comprises a feeding unit (1), a biofilm unit (3) and a water pump (4). The feeding unit (1) is composed of a container for adding acid mine wastewater and nutrients, an upper end cover of which is provided with a stirring paddle (5) and a stirring part extending into the container, and a plurality of vent holes (6) are also provided on the upper end cover; an annular filtering device (7) is provided in the middle of the biofilm unit (3), the outer periphery of which is filled with biofilm elastic filler (9); an aeration device is provided inside the biofilm unit (3) for providing aeration bubbles (8) to the biofilm elastic filler (9) at various locations; the middle of one side of the feeding unit (1) is connected to the outer periphery of the filtering device (7) of the biofilm unit (3) through a connecting pipe system, an inlet pipe is provided inside the filtering device (7) to connect to the water suction port of the water pump (4), and the water outlet is connected back to the feeding unit (1) through the outlet pipe.

2. The device for increasing the pH value of acid mine wastewater according to claim 1, characterized in that: The communicating pipe system comprises a plurality of movable units (2) connected in series between the feeding unit (1) and the biofilm unit (3), the structure of which is the same as that of the feeding unit (1) and is used to increase the wastewater treatment capacity of a single cycle.

3. The device for increasing the pH value of acid mine wastewater according to claim 1, characterized in that: The device is also provided with a pH meter, the measuring end of which is arranged in the filtering device (7) for real-time detection of the pH value of the treated wastewater.

4. The device for increasing the pH value of acid mine wastewater according to claim 3, characterized in that: A three-way electromagnetic valve is connected to the water outlet pipe, one of the water outlets is connected to the feeding unit (1), and the other water outlet is connected to a collection container for temporarily storing treated wastewater that meets the pH standard.

5. The device for increasing the pH value of acid mine wastewater according to claim 1, characterized in that: The material of the biofilm elastic filler (9) is polypropylene, and the structure is radial fiber bundles.

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