A membrane bioreactor sewage treatment device

Abstract

The utility model relates to sewage treatment technical field, concretely relates to a sewage treatment device of membrane bioreactor, include: reaction pool, membrane bioreactor, clean inorganic salt scale and organic matter attachment's cleaning mechanism, the cleaning mechanism includes: threaded rod, the threaded rod is installed with moving frame on screw thread, first electric connector is fixedly connected on the moving frame, first electric connector is fixedly connected with another first electric connector, first electric connector is connected with second electric connector through conducting strip, second electric connector and electric head electric connection, electric head is connected with electrode, in the utility model, through the electrolysis of electrode to water, makes the inorganic salt attachment on cathode, and the acidity of anode increases, and the water in the reaction pool is electrified to form electric field, and the electric field can adsorb the colloid formed by organic matter, reduce membrane pollution, improve membrane cleaning and replacement cycle, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater treatment device using a membrane bioreactor. Background Technology

[0002] Membrane bioreactors (MBRs) are a novel water treatment technology that combines membrane separation units with biological treatment units. By replacing secondary sedimentation tanks with membrane modules, they maintain a high concentration of activated sludge in the bioreactor, reducing the footprint of wastewater treatment facilities and minimizing sludge volume through low sludge loading. Compared to traditional biological water treatment technologies, MBRs have the following main advantages: high treatment efficiency and good effluent quality; compact equipment and small footprint; easy automation and simple operation and management. Since the 1980s, this technology has received increasing attention and become a research hotspot.

[0003] Existing technologies, such as the utility model patent with publication number CN222226069U, describe a MOBR membrane bioreactor, belonging to the field of MOBR membrane technology. Its key technical features include a shell with a cover at the top, an adjustment mechanism inside the shell, and a membrane body inside the shell. The adjustment mechanism includes two limiting plates, an adjustment plate, and several pull rods. The rear side of the adjustment plate contacts the rear side of the inner wall of the shell, the rear side of the limiting plates is fixedly connected to the front side of the adjustment plate, the rear side of the pull rods is fixedly connected to the front side of the adjustment plate, a threaded column is rotatably connected to the top of the adjustment plate, and a fixing plate is fixedly connected to the rear side of the top of the shell. This solves the problem that the size of the MOBR membrane inside most existing MOBR membrane bioreactors is inconvenient to adjust, resulting in limited wastewater treatment efficiency and difficulty in cleaning stains on the MOBR membrane surface, thus affecting the overall performance.

[0004] The device can clean stains on the membrane surface, but inorganic salt scale and organic matter will adhere to the membrane surface, and the scraper cannot effectively clean the inorganic salt structure and organic matter.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide a wastewater treatment device using a membrane bioreactor that can effectively solve the above-mentioned technical problems.

[0007] To achieve the purpose of this utility model, the following technical solution is adopted: a wastewater treatment device with a membrane bioreactor, comprising: a reaction tank, a membrane bioreactor, and a cleaning mechanism for cleaning inorganic salt scale and organic matter adhesion. The cleaning mechanism includes: a threaded rod, a movable frame threadedly mounted on the threaded rod, a first contactor fixedly connected to the movable frame, the first contactor being fixedly connected to another first contactor, the first contactor being connected to a second contactor via a conductive plate, the second contactor being electrically connected to a contact head, and the contact head being connected to an electrode.

[0008] Furthermore, the terminals of the first aligned connector are electrically connected to the positive and negative poles of the power supply, respectively.

[0009] Furthermore, the terminals of two adjacent first terminals are connected to different positive and negative power supplies.

[0010] Furthermore, the electrode is made of graphite.

[0011] Furthermore, a filter screen is installed between the membrane bioreactor and the electrode.

[0012] Furthermore, the interior of the filter screen is filled with activated carbon.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The wastewater treatment device of the membrane bioreactor of the present invention electrolyzes water through electrodes, causing inorganic salts to adhere on the cathode, while the acidity of the anode increases. Furthermore, an electric field is formed by passing electricity through the water in the reaction tank. The electric field can adsorb the colloids formed by organic matter, reduce membrane fouling, improve the cleaning and replacement cycle of the membrane, and reduce costs. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] Figure 1 is a schematic diagram of the wastewater treatment device of a membrane bioreactor according to the present invention.

[0016] Figure 2 is a schematic diagram of the cleaning mechanism in this utility model.

[0017] Figure 3 is a schematic diagram of the cleaning mechanism in this utility model.

[0018] In the diagram: 1. Reaction tank; 2. Membrane bioreactor; 3. Filter screen; 4. Cleaning mechanism; 41. Threaded rod; 42. Moving frame; 43. Limiting rod; 44. First contactor; 45. Support base; 46. Conductive sheet; 47. Second contactor; 48. Contact head; 49. Electrode. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0020] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a mechanism is referred to as being "fixed to" another mechanism, it can be directly on the other mechanism or there may be an intervening mechanism. When a mechanism is considered to be "connected" to another mechanism, it can be directly connected to the other mechanism or there may be an intervening mechanism at the same time. When a mechanism is considered to be "set on" another mechanism, it can be directly set on the other mechanism or there may be an intervening mechanism at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0021] like Figures 1 to 3 As shown, this utility model discloses a wastewater treatment device with a membrane bioreactor 2, comprising: a reaction tank 1, a membrane bioreactor 2, and a cleaning mechanism 4 for cleaning inorganic salt scaling and organic matter adhesion; the membrane bioreactor 2 is fixedly installed at the bottom of the inner wall of the reaction tank 1, and the organic matter in the wastewater is decomposed by microorganisms in the reaction tank 1, and the wastewater is filtered through the membrane, while the cleaning mechanism 4 adjusts the inorganic salt concentration at the position of the membrane to prevent inorganic salt from scaling on the membrane, and the cleaning mechanism 4 can also adsorb colloids formed by organic matter.

[0022] The cleaning mechanism 4 includes: a threaded rod 41, which is rotatably mounted between the outer wall of the reaction tank 1 and a support frame, while the support frame is fixedly mounted on the outer wall of the reaction tank 1. A movable frame 42 is threaded onto the threaded rod 41, and the movable frame 42 slides and passes through a limiting rod 43, which is fixedly connected to the outer wall of the reaction tank 1. The limiting rod 43 limits the movement of the movable frame 42, preventing the threaded rod 41 from driving the movable frame 42 to rotate. The two ends of the movable frame 42 are located on both sides of the reaction tank 1 and are fixedly connected to a first contactor 44. By rotating the threaded rod 41, the threaded rod 41 drives the movable frame 42 to move, and the movable frame 42 drives the first contactor 44 to move. The first connector 44 is slidably mounted on the support base 45, which is fixedly mounted on both sides of the reaction tank 1. The terminals of the first connectors 44 aligned on the two support bases 45 are electrically connected to the positive and negative terminals of the power supply, respectively. The positive terminal of the power supply is connected to the anode, and the negative terminal is connected to the cathode. The first connector 44 is fixedly connected to another first connector 44. The two adjacent first connectors 44 are connected to different power supplies with different positive and negative terminals. One first connector 44 is connected to a second connector 47 through a conductive plate 46. The second connector 47 is fixedly mounted on the top of the support base 45. The second connector 47 is connected to the connector 48. Electrical connection: The connector 48 is mounted on the support base 45 and connected to the electrode 49, which is inserted into the reaction tank 1. When the two first connectors 44 on the same support base 45 are in contact with the conductive sheet 46, the electrodes 49 corresponding to the first connectors 44 are the cathode or anode, respectively. This can change the potential of the electrode 49, thereby changing the distribution of ions in the reaction tank 1, avoiding the formation of more inorganic salt deposits near the electrode 49, and extending the cleaning cycle.

[0023] It should be added that the material of the support base 45 is an insulating material, preferably ceramic. Ceramic has good insulation properties and high oxidation resistance, which allows it to be used for a long time and reduces maintenance costs.

[0024] Furthermore, the electrode 49 is shaped with a larger top and a smaller bottom. By inserting the electrode 49 into the positioning hole on the support base 45, when the electrode 49 is partially inserted, the electrode 49 contacts the positioning hole and is limited and supported by the edge of the positioning hole, so that the electrode 49 can be inserted into the reaction cell 1, and at the same time, it is easy to remove the electrode 49.

[0025] It should be noted that the material of electrode 49 is graphite. Graphite as electrode 49 has good conductivity and chemical stability, and graphite is low in cost and easy to process. Multiple electrodes 49 are set to form cathode and anode respectively. When electrode 49 needs to be replaced, the corresponding terminal 48 is disconnected and electrode 49 is removed from support 45.

[0026] Furthermore, a filter screen 3 is installed between the membrane bioreactor 2 and the electrode 49, and the filter screen 3 is filled with activated carbon. The activated carbon adsorbs and filters the organic matter in the wastewater, preventing the colloids formed by the organic matter from adhering to the electrode 49. The colloids easily fill the gaps in the graphite, thereby causing wear and tear on the graphite electrode 49, shortening the replacement cycle of the graphite electrode 49, reducing membrane fouling, and extending the cleaning and replacement cycle of the membrane.

[0027] Working principle: The inorganic salt crystallization in the reaction tank 1 is interfered with by electrolyzing water, causing the inorganic salt to precipitate near the cathode, reducing the inorganic salt's contribution to the membrane and preventing it from easily fouling the membrane. In addition, the electric field generated by the current can adsorb the colloids formed by organic matter, and the colloids are blocked and adsorbed by the filter screen 3 filled with activated carbon, avoiding the colloids from causing damage to the graphite electrode 49.

[0028] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A wastewater treatment device using a membrane bioreactor, characterized in that, include: Reaction tank, membrane bioreactor, cleaning mechanism for removing inorganic salt scale and organic matter adhesion; The cleaning mechanism includes: a threaded rod, a movable frame threadedly mounted on the threaded rod, a first contactor fixedly connected to the movable frame, the first contactor being fixedly connected to another first contactor, the first contactor being connected to a second contactor via a conductive plate, the second contactor being electrically connected to a contact head, and the contact head being connected to an electrode.

2. The wastewater treatment device using a membrane bioreactor as described in claim 1, characterized in that, The terminals of the first aligned connector are electrically connected to the positive and negative terminals of the power supply, respectively.

3. A wastewater treatment device using a membrane bioreactor as described in claim 2, characterized in that, The terminals of two adjacent first terminals are connected to different positive and negative power supplies.

4. A wastewater treatment device using a membrane bioreactor as described in claim 1, characterized in that, The electrode is made of graphite.

5. A wastewater treatment device using a membrane bioreactor as described in claim 1, characterized in that, A filter screen is installed between the membrane bioreactor and the electrode.

6. A wastewater treatment device using a membrane bioreactor as described in claim 5, characterized in that, The filter screen is filled with activated carbon.

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