Strain and sludge mixed reaction integrated device under micro electric field loading

Abstract

The utility model discloses a strain and sludge mixing reaction integrated device under micro electric field loading. The strain and sludge mixing reaction integrated device comprises a mixing pipeline, an electrode assembly and a control panel, the control panel is used for displaying data of the sensor, controlling start and stop of the electromagnetic valve and providing accurate parameters for the electrode; the electrode assembly comprises a plug-in positive electrode and a plug-in negative electrode. Through the structural design and position distribution of the mixing pipeline and the electrode assembly, the intensity and distribution of a micro electric field are optimized, the stimulation effect on microorganisms is kept stable, and the balanced stimulation effect has positive influence on the activity of the microorganisms, the granulation process of the sludge and the optimization of a microbial community structure; the treatment efficiency of microorganisms can be improved, so that the degradation efficiency of the microorganisms on pollutants is indirectly improved, and the requirements on refinement and high efficiency of strain sludge mixed reaction in actual sewage treatment are met.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical wastewater treatment technology, and in particular to an integrated device for mixing and reacting bacteria and sludge under micro-electric field loading. Background Technology

[0002] The activated sludge process refers to a wastewater treatment method that utilizes the microbial community in activated sludge to biodegrade and transform organic matter, nitrogen, phosphorus, and other nutrients in wastewater, thereby achieving wastewater purification.

[0003] However, with the diversification of wastewater composition and the gradual upgrading of environmental standards, traditional activated sludge treatment technology is increasingly encountering performance limitations. For example, in conventional activated sludge treatment systems, the types and activities of microbial communities are limited, resulting in poor removal efficiency for certain difficult-to-decompose pollutants. At the same time, the synergistic effect between microbial populations is not fully realized, making it difficult to further improve overall treatment efficiency.

[0004] To address the aforementioned technical problems, those skilled in the art have proposed introducing microbial strains with specific degradation functions into activated sludge systems to construct a more adaptable and decomposing microbial community. However, in practice, simply adding new strains to activated sludge usually does not produce the expected treatment effect. This is because the newly introduced strains are not mixed evenly with the existing activated sludge, making it difficult for the new strains to quickly adapt to the new environment and establish an effective symbiotic relationship with the existing microbial population. Consequently, the activity of the new strains is inhibited, or even they die, thus failing to exert their intended degradation effect. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides an integrated device for mixing and reacting microorganisms and sludge under a micro-electric field. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0006] The present invention adopts the following technical solution:

[0007] An integrated device for mixing and reacting microorganisms and sludge under a micro-electric field is provided, comprising: a mixing pipe and an electrode assembly; the mixing pipe includes: a plurality of straight pipe segments arranged sequentially from top to bottom, with an inclined pipe segment between two adjacent straight pipe segments, and the inclined pipe segment and the straight pipe segment are connected by an arc-shaped propulsion pipe, the arc-shaped propulsion pipe being equipped with a spiral stirrer; the electrode assembly includes: an insertable positive electrode and an insertable negative electrode, the insertable positive electrode and the insertable negative electrode being alternately arranged on the straight pipe segments.

[0008] Furthermore, each of the straight pipe segments is provided with an insertable positive electrode or an insertable negative electrode at the middle position, and the insertable positive electrode and the insertable negative electrode are arranged alternately from top to bottom and installed on each of the straight pipe segments.

[0009] Furthermore, 4-6 insertion holes are opened along the circumference of the straight section of the pipe. A sealing post is provided at the opening of the insertion hole. The sealing post has a channel communicating with the insertion hole. A groove is opened on the end face of the sealing post, and a sealing gasket is placed in the groove.

[0010] Furthermore, both the insertable positive electrode and the insertable negative electrode are composed of several electrode plugs. Each electrode plug includes an electrode base, an electrode body, and a sealing ring. The electrode body is disposed on the electrode base, the lower half of the electrode base is located inside the sealing post, and the sealing ring is disposed outside the electrode base and the sealing post.

[0011] Furthermore, the insertion depth of each electrode body is 1 / 3 to 1 / 2 of the inner radius of the straight section of the pipe.

[0012] Furthermore, the integrated device for mixing and reacting bacteria and sludge under micro-electric field loading further includes: a housing, an inlet pipe, an outlet pipe, an inlet valve, and an outlet valve. The mixing pipe is disposed within the housing. The inlet pipe and the outlet pipe are respectively connected to the two ends of the mixing pipe. The inlet valve is disposed on the inlet pipe, and the outlet valve is disposed on the outlet pipe.

[0013] Furthermore, the integrated device for mixing and reacting microorganisms and sludge under micro-electric field loading further includes: a microorganism input pipe, a sludge input pipe, and a total output pipe. The microorganism input pipe and the sludge input pipe are both connected to the feed pipe, and the total output pipe is connected to the discharge pipe.

[0014] Furthermore, the integrated device for mixing and reacting bacteria and sludge under micro-electric field loading also includes: a control panel, a wireless power sensor, a temperature sensor, and a pressure sensor; the control panel is disposed on the housing, and the wireless power sensor, the temperature sensor, and the pressure sensor are disposed on the mixing pipe.

[0015] The beneficial effects of this utility model are:

[0016] 1. The structural design and positional distribution of the hybrid pipeline and electrode assembly optimize the intensity and distribution of the micro-electric field, ensuring a stable stimulation effect on microorganisms. This balanced stimulation effect has a positive impact on the activity of microorganisms, the granulation process of sludge, and the optimization of the microbial community structure, which can improve the treatment efficiency of microorganisms and indirectly improve the degradation efficiency of pollutants by microorganisms.

[0017] 2. There are no dead zones during the mixing process of microorganisms and sludge, achieving uniform and efficient mixing, thus meeting the requirements for refined and efficient microbial-sludge mixing reactions in actual wastewater treatment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the integrated device for mixing and reacting bacteria and sludge under a micro-electric field loading according to this utility model.

[0020] Figure 2 This is a schematic diagram showing the connection of the straight section pipe, the inclined section pipe, and the arc-shaped propulsion pipe of this utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the hybrid pipe and the electrode assembly of this utility model;

[0022] Figure 4 This is a schematic diagram of the electrode plug of this utility model. Detailed Implementation

[0023] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] like Figure 1-4 As shown, an integrated device for mixing and reacting microorganisms and sludge under a micro-electric field is provided, comprising: a housing 100, a feed pipe 200, a discharge pipe 300, a feed valve 210, a discharge valve 310, a microorganism input pipe 220, a sludge input pipe 230, a total output pipe 320, a mixing pipe, an electrode assembly, a wireless power sensor 410, a temperature sensor 420, a pressure sensor 430, and a control panel 440.

[0025] The mixed pipeline includes: straight section pipeline 510, inclined section pipeline 520, and arc-shaped propulsion pipeline 530.

[0026] The straight pipe sections 510 are arranged sequentially from top to bottom, with uniform spacing between each section, creating a stable flow pattern and providing a uniform flow environment for the mixing of microorganisms and sludge. An inclined pipe section 520 is installed between adjacent straight pipe sections 510, connecting them to form a continuous flow path and altering the fluid direction, thus enhancing the mixing effect. The inclined pipe section 520 is connected to the straight pipe section 510 via an arc-shaped propulsion pipe 530. The arc-shaped propulsion pipe 530 helps smooth fluid deflection, reduces fluid shear force, protects microorganisms from damage, and avoids dead zones at bends. A spiral agitator 540 is installed on the arc-shaped propulsion pipe 530 to further promote uniform mixing of microorganisms and sludge, while providing flow momentum and, combined with an applied micro-electric field, enhancing microbial activity.

[0027] The combined design of the straight section pipe 510, the inclined section pipe 520, and the arc-shaped propulsion pipe 530, along with the use of the spiral agitator 540, ensures that the microbial inoculum and sludge can be uniformly and efficiently mixed throughout the entire mixing process, while avoiding the formation of mixing dead zones. Furthermore, the structural design of the mixing pipes guarantees the stability of fluid flow, allowing microorganisms to maintain good activity during treatment, reducing unstable factors in the process, and thus further improving the removal efficiency of pollutants.

[0028] The electrode assembly provides a micro-electric field to the area where the mixing pipe is located. Stimulated by this micro-electric field, microorganisms can more effectively decompose and transform pollutants, resulting in faster and more thorough removal of organic pollutants and heavy metal ions from wastewater, ultimately leading to a significant improvement in effluent quality. Specifically, the electrode assembly includes an insertable positive electrode 600 and an insertable negative electrode 700.

[0029] Inserted positive electrodes 600 and inserted negative electrodes 700 are arranged alternately on the straight section pipe 510, that is, an inserted positive electrode 600 or an inserted negative electrode 700 is provided at the middle position of each straight section pipe 510, and the inserted positive electrodes 600 and inserted negative electrodes 700 are arranged alternately from top to bottom and installed on each straight section pipe 510.

[0030] Installing electrodes at the midpoint of the straight pipe section 510 maximizes the effect of the micro-electric field generated by the electrodes on the fluid within the pipe. Furthermore, the arrangement and placement of the electrode assembly in this application ensures the formation of a relatively uniform micro-electric field in each straight pipe section 510. This allows the electric field lines to penetrate the water body more evenly, resulting in a more uniform distribution of current density throughout the water body. Consequently, the water body is uniformly charged, and the strength and distribution of the micro-electric field are optimized, ensuring a stable stimulating effect on microorganisms.

[0031] The principle behind the improved treatment effect of micro-electric fields lies in their ability to alter the surface charge characteristics, cell membrane permeability, and intracellular enzyme activity of microbial cells, thereby influencing their growth, metabolism, and reproduction. Therefore, introducing a micro-electric field into a microbial-sludge mixing system can promote the interaction between microorganisms and activated sludge, enhance microbial activity and pollutant degradation capabilities, optimize the microbial community structure, improve the overall system's treatment effect on complex pollutants in wastewater, and enhance the settling performance of activated sludge.

[0032] To facilitate the installation of the electrode assembly onto the mixing pipe, 4-6 evenly distributed insertion holes 511 are made along the circumference of the straight section of the pipe 510, allowing the insertion-type positive electrode 600 and insertion-type negative electrode 700 to be embedded therein. A sealing post 512 is provided at the opening of the insertion hole 511, and the sealing post 512 has a channel 513 communicating with the insertion hole 511. The channel 513 is used for electrode insertion and fixation. A groove 514 is formed on the end face of the sealing post 512, and a sealing gasket 515 is placed in the groove 514 to ensure the seal between the electrode and the mixing pipe.

[0033] Both the insertable positive electrode 600 and the insertable negative electrode 700 are composed of several electrode plugs, the number of which matches the number of sockets 511. Each electrode plug includes an electrode holder 671, an electrode body 672, and a sealing ring 673. The electrode body 672 is mounted on the electrode holder 671, with the upper half of the holder 671 located outside the pipe and the lower half located inside the sealing post 512. The sealing ring 673 is located outside both the electrode holder 671 and the sealing post 512, sealing the junction between them to ensure electrode fixation and pipe sealing.

[0034] The design of the sealing column 512, sealing gasket 515, and sealing ring 673 ensures a tight seal between the electrode and the mixing pipeline, preventing fluid leakage and guaranteeing stability after electrode insertion. The electrode plug design simplifies and expedites the installation and replacement of the electrode assembly, reducing downtime during maintenance. The uniform distribution of electrodes around the pipeline generates a uniform electric field, thus evenly influencing the sludge and bacteria within the pipeline and improving treatment efficiency. The electrode holder 671 design allows the electrode body 672 to be securely installed within the pipeline, preventing displacement due to fluid impact.

[0035] The insertion depth of each electrode body 672 is 1 / 3 to 1 / 2 of the inner radius of the straight section of the pipe 510 to ensure that the electric field can cover most of the area inside the pipe.

[0036] A mixing pipeline is installed inside the housing 100. The inlet pipeline 200 and outlet pipeline 300 are connected to the two ends of the mixing pipeline, respectively. An inlet valve 210 is installed on the inlet pipeline 200, and an outlet valve 310 is installed on the outlet pipeline 300. Both the inlet valve 210 and outlet valve 310 are solenoid valves to control the flow rate and start / stop of the feed and discharge. The inoculum inlet pipeline 220 and the sludge inlet pipeline 230 are both connected to the inlet pipeline 200. Inoculum is transported from the inoculum inlet pipeline 220 to the inlet pipeline 200 and then enters the mixing pipeline. Sludge is transported from the sludge inlet pipeline 230 to the inlet pipeline 200 and then enters the mixing pipeline. The mixed fluid is transported from the outlet pipeline 300 to the main output pipeline 320, which is connected to the outlet pipeline 300.

[0037] The control panel 440 is mounted on the housing 100. The control panel 440 integrates a controller for logic processing and is equipped with a display screen for user interaction. Wireless electrical sensors 410, 420, and 430 are connected to the controller's data input terminals. The display screen on the control panel 440 shows the measured values ​​of each sensor, such as temperature and pressure. The feed valve 210 and discharge valve 310 are connected to the controller's control output terminals, and their opening and closing are controlled by the control panel 440. The insertable positive electrode 600 and insertable negative electrode 700 are connected to a DC power supply. The control panel 440 sets the required voltage or current for the insertable positive electrode 600 and insertable negative electrode 700 during operation.

[0038] The electrodes and power supply must be connected with suitable wires and properly insulated to prevent leakage. Insulated copper wires can be used to securely connect the electrodes to the positive and negative terminals of the power supply. The connection points should be sealed with insulating sealant or insulating sleeves to prevent fluid from contacting the connection and causing a short circuit. Simultaneously, the power supply itself should be placed in a dry, safe location, away from potentially humid environments and corrosive gases around the mixing pipes.

[0039] Furthermore, the control panel 440 can be equipped with multiple different types of interfaces. When there are many sensors, solenoid valves, and electrodes, or when their interfaces are not directly compatible with the control panel, an intermediate control module can be used for connection. The signal acquisition module of the control panel 440 centrally acquires and preprocesses signals from multiple sensors, displaying the corresponding measured values, such as temperature and pressure, on the screen. The solenoid valve drive module of the control panel 440 receives control signals from the control panel to drive the solenoid valves. The power control module of the control panel 440 provides precise voltage or current to the electrodes according to the instructions from the control panel.

[0040] Wireless electrical sensor 410, temperature sensor 420, and pressure sensor 430 are installed on the mixing pipeline. These three sensors work together to provide data support for real-time monitoring and optimization of the reaction process, improving system operating efficiency, stability, and safety. Preferably, the sensors should not be concentrated in the same location to avoid affecting the flow of bacteria and sludge.

[0041] A field experiment was conducted at a wastewater treatment plant. One of the biological treatment tanks was selected, and the integrated microbial and sludge mixing and reaction device described in this application was used as the experimental group. The feed side was connected to both the microbial inlet pipe and the sludge inlet pipe, with the other end of the sludge inlet pipe drawing back sludge from the end of the biological treatment tank. The discharge side was connected to the main output pipe, transporting the microbial-sludge mixture to the front end of the biological treatment tank. The state changes of the activated sludge in the biological treatment tank after using the integrated mixing and reaction device were investigated. Activated sludge from a biological treatment tank using a mixing and reaction device without the micro-electric field activated was used as the control group. 500 mL of sludge mixture was taken from the discharge side, and the sludge settling volume of the sludge samples was measured. The mixed sludge mixture was quickly poured into a 500 mL graduated cylinder to full volume, allowed to settle for 30 minutes, and the volume of the activated sludge after settling was observed.

[0042] The settling volume of the sludge mixture in the experimental group was significantly lower than that in the control group, indicating that the settling behavior of the sludge changed significantly under the influence of the micro-electric field. Since the control group was not affected by the micro-electric field, its sludge mixture exhibited a relatively large settling volume, as shown in the graduated cylinder on the right, with a higher liquid level. In contrast, the experimental group, with the presence of a micro-electric field, showed a significantly lower liquid level in the graduated cylinder on the left compared to the control group, resulting in a significantly reduced settling volume.

[0043] Microscopic observation of the two groups of samples clearly showed that the sludge particles in the control group were relatively loosely distributed, with larger gaps between particles and fewer and smaller aggregates. In the experimental group, the microorganisms were more concentrated within the aggregates. The micro-electric field may have affected the activity or metabolism of the microorganisms, thus altering the sludge state.

[0044] An electric field may alter the cell membrane potential of microorganisms in sludge, thereby affecting their metabolic activities and physiological functions, causing them to secrete more extracellular polymers. This promotes adhesion between microorganisms and between microorganisms and other substances, leading to sludge particle aggregation. On the other hand, an electric field may induce electrophoresis on charged ions and particles in the sludge, causing them to move and aggregate under the influence of the electric field force, thus altering the sludge structure. Micro-electric fields have a positive promoting effect on sludge settling. This may be because the micro-electric field alters the surface properties of sludge particles, making the surface charge distribution more favorable for particle aggregation and settling, or it may affect the hydration film of sludge particles, thereby accelerating the settling process. This results in the experimental group's sludge settling faster and exhibiting a smaller settling volume ratio within the same timeframe.

[0045] This finding provides a new possible approach and optimization direction for sludge treatment. In actual sludge treatment processes, further in-depth research can be conducted on the relationship between relevant parameters of the micro-electric field, such as electric field strength and application time, and sludge settling performance, in order to determine the optimal micro-electric field treatment conditions, thereby improving the efficiency and effectiveness of sludge treatment and reducing treatment costs and time.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An integrated device for mixing and reacting microorganisms and sludge under a micro-electric field, characterized in that, include: The mixing pipe and electrode assembly; the mixing pipe includes: a plurality of straight pipe segments arranged sequentially from top to bottom, an inclined pipe segment between two adjacent straight pipe segments, and the inclined pipe segment and the straight pipe segment are connected by an arc-shaped propulsion pipe, and a spiral stirrer is provided on the arc-shaped propulsion pipe; the electrode assembly includes: an insertable positive electrode and an insertable negative electrode, the insertable positive electrode and the insertable negative electrode being alternately arranged on the straight pipe segments.

2. The integrated device for mixing and reacting microorganisms and sludge under a micro-electric field loading according to claim 1, characterized in that, At the middle position of each of the straight pipe segments, there is an insertable positive electrode or an insertable negative electrode, and the insertable positive electrode and the insertable negative electrode are arranged alternately from top to bottom and installed on each of the straight pipe segments.

3. The integrated device for mixing and reacting microorganisms and sludge under a micro-electric field loading according to claim 2, characterized in that, Four to six insertion holes are made along the circumference of the straight section of the pipe. A sealing post is provided at the opening of each insertion hole. The sealing post has a channel communicating with the insertion hole. A groove is provided on the end face of the sealing post. A sealing gasket is provided in the groove.

4. The integrated device for mixing and reacting bacteria and sludge under a micro-electric field loading according to claim 3, characterized in that, Both the insertable positive electrode and the insertable negative electrode are composed of several electrode plugs. Each electrode plug includes an electrode base, an electrode body, and a sealing ring. The electrode body is disposed on the electrode base, the lower half of the electrode base is located inside the sealing post, and the sealing ring is disposed outside the electrode base and the sealing post.

5. The integrated device for mixing and reacting bacteria and sludge under a micro-electric field loading according to claim 4, characterized in that, The insertion depth of each electrode body is 1 / 3 to 1 / 2 of the inner radius of the straight section of the pipe.

6. The integrated device for mixing and reacting microorganisms and sludge under micro-electric field loading according to claim 5, characterized in that, Also includes: The container includes a housing, an inlet pipe, an outlet pipe, an inlet valve, and an outlet valve. The mixing pipe is located inside the housing. The inlet pipe and the outlet pipe are respectively connected to the two ends of the mixing pipe. The inlet valve is located on the inlet pipe, and the outlet valve is located on the outlet pipe.

7. The integrated device for mixing and reacting microorganisms and sludge under a micro-electric field loading according to claim 6, characterized in that, Also includes: The system includes a microbial inlet pipe, a sludge inlet pipe, and a total outlet pipe. The microbial inlet pipe and the sludge inlet pipe are both connected to the feed pipe, and the total outlet pipe is connected to the discharge pipe.

8. The integrated device for mixing and reacting microorganisms and sludge under micro-electric field loading according to claim 7, characterized in that, Also includes: Control panel, wireless power sensor, temperature sensor, pressure sensor; The control panel is mounted on the housing, and the wireless power sensor, the temperature sensor, and the pressure sensor are mounted on the mixing pipe.

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