Integrated rural domestic sewage treatment device
By integrating design and applying membrane aeration components, the problems of high energy consumption and management difficulty in traditional AO processes have been solved, realizing a rural domestic sewage treatment device with high oxygen utilization and low aeration energy consumption, and improving the degree of automation and treatment efficiency.
Patent Information
- Application Number
- CN202520470340.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Traditional AO process rural domestic sewage treatment devices have high energy consumption, low automation, and high management difficulty. They also require a large number of aeration and mixing devices, resulting in high energy consumption and management costs.
It adopts an integrated design, including an anoxic tank, an aerobic tank, and a sedimentation tank. It utilizes membrane aeration components and a flow promoter to reduce the volume of the aerobic tank, achieves high oxygen utilization through membrane aeration components and perforated pipes, reduces aeration volume, and improves automation through automatic dosing and ultraviolet disinfection devices.
It achieves high oxygen utilization, low aeration energy consumption and high removal efficiency, reduces energy consumption and management difficulty, and improves the level of automation.
Smart Images
Figure CN223659925U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the water treatment technical field, concretely relates to an integrated rural domestic sewage treatment device. BACKGROUND
[0002] At present, the sewage treatment of villages and small towns mainly adopts AO process for treatment, wherein the AO treatment process is also called anaerobic-aerobic process method. It is mainly used for denitrification and phosphorus removal and removal of organic matters in water. The anaerobic hydrolysis technology is applied to the pretreatment of activated sludge in the AO treatment, which can degrade organic pollutants and has a certain denitrification and phosphorus removal function. The traditional biological denitrification (AO) is realized by relying on autotrophic bacteria nitrification-heterotrophic bacteria denitrification, and a certain carbon source is required for completing such denitrification process. Generally, the COD / TN range is between 8 and 15, and a better denitrification effect can be achieved. In the traditional AO treatment process, the volume ratio of the anoxic tank to the aerobic tank is 3:7, the aerobic tank has a large volume, the aeration energy consumption is high, the mixed liquid reflux ratio is generally 100-400%, and the automation degree is low, the management difficulty is high, and a stirring device needs to be arranged in the anoxic tank for preventing sludge sedimentation in the anoxic tank, which has a large energy consumption. CONTENT OF THE UTILITY MODEL
[0003] The utility model proposes an integrated rural domestic sewage treatment device, which has the characteristics of high oxygen utilization rate, small aeration amount, high removal efficiency, and low energy consumption.
[0004] Therefore, the utility model adopts the technical scheme that an integrated rural domestic sewage treatment device includes a box body arranged as a rectangular body, a box body arranged as a rectangular body, the box body is sequentially divided into an anoxic tank, an aerobic tank and a sedimentation tank in sequence through a partition plate, a sewage inlet is arranged at the upper end of the anoxic tank, a clear water outlet is arranged at the upper end of the sedimentation tank, a sludge outlet is arranged at the lower end of the sedimentation tank, an aeration device is arranged in the aerobic tank, the aeration device is connected with a fan through an aeration pipeline, a membrane aeration assembly through which oxygen can pass is arranged in the anoxic tank, the membrane aeration assembly is connected with the fan through a ventilation pipeline, when air enters the membrane aeration assembly, oxygen in the air can pass through the membrane wall of the membrane aeration assembly and enter the anoxic tank.
[0005] As a preferred scheme in the above scheme, the membrane aeration assembly includes a frame and a plurality of air-permeable membranes arranged in the frame, a plurality of first perforated pipes for discharging waste gas in the membrane aeration assembly are arranged at the lower end of the frame, the exhaust ports of the first perforated pipes are directed to the four corners of the anoxic tank, and a first electromagnetic valve is arranged on the first perforated pipe.
[0006] Further preferably, a plurality of second perforated pipes for discharging waste gas in the membrane aeration assembly are arranged below the frame, and a second electromagnetic valve is arranged on the second perforated pipe.
[0007] Further preferably, the exhaust port of the second perforated pipe is aligned upwardly to the air permeable membrane.
[0008] Further preferably, a sludge return pipe is arranged between the sedimentation tank and the anoxic tank, and an air-lift device is connected to the sludge return pipe.
[0009] Further preferably, a communication port is arranged at the lower part of the partition plate between the anoxic tank and the aerobic tank, and an openable and closable gate is arranged at the position of the communication port, and a flow inducer is arranged at the position of the communication port in the anoxic tank to prevent sludge precipitation in the anoxic tank.
[0010] Further preferably, the openable and closable gate comprises a gate and a lead screw for driving the gate to move up and down, the upper end of the lead screw is provided with a rotating handle after penetrating through a box body, a lead screw nut is arranged on the box body and screwed with the lead screw, and the lower end of the lead screw is rotatably arranged on the gate.
[0011] Further preferably, the lower part of the sedimentation tank is tapered, and an automatic dosing box, an ultraviolet disinfection device and a fan are arranged at the tapered position below the sedimentation tank, the automatic dosing box is used for adding phosphorus removal agent or flocculant in the sedimentation tank, the ultraviolet disinfection device is arranged on a clear water pipeline in communication with a clear water discharge port, a clear water tee joint is arranged on the clear water pipeline, one end of the clear water tee joint is in communication with the outside, and the other end of the clear water tee joint is in communication with the automatic dosing box.
[0012] Further preferably, two sedimentation tanks are arranged at left and right positions with a spacing, and each sedimentation tank is square.
[0013] The device has the advantages that: the membrane aeration assembly which can be communicated with the fan and through which oxygen is supplied is arranged in the anoxic tank, so that the four sides of the anoxic tank close to the membrane aeration assembly are in an aerobic environment to realize nitrification, so that the anoxic tank can also realize the aerobic environment, thus the volume of the aerobic tank can be effectively reduced, the aeration amount is reduced, and the aeration energy consumption is reduced; the perforated pipe is used to realize the stirring of the anoxic tank during waste gas discharge to prevent dead angles, and the waste gas discharge can realize the shaking of the membrane aeration assembly to prevent too much sludge from adhering to the membrane aeration assembly, so that the device can be automatically and smoothly operated, and the energy consumption is reduced, and manual management is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 It is a top view of the device.
[0015] Fig. 2 It is a front view of the device.
[0016] Attached reference numerals: Box-1, Anoxic tank-2, Aerobic tank-3, Sedimentation tank-4, Membrane aeration assembly-5, First perforated pipe-5a, Second perforated pipe-5b, Blower-6, Controllable gate valve-7, Flow booster-8, Automatic dosing tank-9. Detailed Implementation
[0017] The present invention will be further described below with reference to embodiments and accompanying drawings:
[0018] like Figs. 1-2 As shown, an integrated rural domestic sewage treatment device comprises a rectangular box 1. The internal space of box 1 is divided from left to right by partitions into an anoxic tank 2, an aerobic tank 3, and a sedimentation tank 4, all connected sequentially. A sewage inlet is located at the upper end of the anoxic tank 2, a clear water outlet is located at the upper end of the sedimentation tank 4, and a sludge outlet is located at the lower end of the sedimentation tank 4. An aeration device is installed in the aerobic tank 3, and this aeration device is connected to a blower 6 via an aeration pipe. Aeration of the aerobic tank is achieved through the aeration device, which utilizes existing technology. Preferably, a corresponding sludge solenoid valve is installed at the sludge outlet, allowing for periodic sludge discharge by opening and closing the valve.
[0019] A membrane aeration module 5, which allows oxygen to pass through, is placed in the center of the anoxic tank 2. The membrane aeration module 5 is connected to a blower 6 via a ventilation duct. When air enters the membrane aeration module 5, the oxygen in the air can pass through the membrane wall of the membrane aeration module 5 and enter the anoxic tank. There, it reacts with the wastewater near the membrane aeration module in the anoxic tank, resulting in a nitrification reaction. This creates an aerobic environment for the water near the membrane aeration module 5, with the oxygen concentration decreasing from the inside out, indicating an anoxic reaction. This reduces the volume of the aerobic tank and the aeration rate. In this application, the volume of the anoxic tank is approximately twice the volume of the aerobic tank.
[0020] Ideally, the aeration pipe and the ventilation pipe are connected to a ventilation tee, and then the ventilation tee is connected to the blower. At the same time, an aeration solenoid valve and an aeration flow meter are installed on the aeration pipe, and a ventilation solenoid valve, a ventilation pressure gauge, and a ventilation flow meter are installed on the ventilation pipe.
[0021] To ensure the effectiveness of the sedimentation tanks, it is best to have two sedimentation tanks spaced apart on the left and right sides, with the upper part of each sedimentation tank being square and the lower part being conical. An automatic dosing tank 9, an ultraviolet disinfection device, a blower, and other equipment are installed in the conical space at the bottom of the sedimentation tank, allowing the area below the sedimentation tank to be used as an equipment room, thus effectively utilizing the lower space of the sedimentation tank and reducing the overall size of the system.
[0022] The ultraviolet disinfection device is arranged on the clean water pipeline communicated with the clean water discharge outlet, a drain tee is arranged on the clean water pipeline, one end of the drain tee is communicated with the outside, the other end of the drain tee is communicated with the automatic dosing tank, water for automatic dosing is realized, and a dosing flowmeter and a dosing electromagnetic valve are arranged on the pipeline communicated with the automatic dosing tank, and an electromagnetic valve is also arranged on the pipeline communicated with the outside.
[0023] The automatic dosing tank is provided with a dosing pipeline communicated with the sedimentation tank, the dosing pipeline is used for adding phosphorus removal agents and flocculants into the sedimentation tank, and a dosing flowmeter and a dosing electromagnetic valve are arranged on the dosing pipeline, and in the application, PAC (polyaluminum chloride) is added.
[0024] Preferably, the membrane aeration assembly 5 comprises a frame and a plurality of oxygen-permeable membranes arranged in the frame. Specifically, the oxygen-permeable membranes are made into the shape of membrane tubes and are distributed in the frame. An air buffer chamber is arranged at the upper end of the frame and is communicated with the upper ends of all the oxygen-permeable membranes. An exhaust buffer chamber is arranged at the lower end of the frame and is communicated with the lower ends of all the oxygen-permeable membranes.
[0025] After the oxygen in the membrane aeration assembly reacts with the sewage, waste gas mainly composed of nitrogen remains in the membrane aeration assembly. To ensure that fresh air can enter the oxygen-permeable membranes, a plurality of first perforated pipes 5a for discharging the waste gas in the membrane aeration assembly are arranged at the lower end of the frame, and the exhaust ports of the first perforated pipes 5a are directed towards the four corners of the anoxic tank 2. A first electromagnetic valve is arranged between the first perforated pipes 5a and the oxygen-permeable membranes, i.e., the first perforated pipes are communicated with the exhaust buffer chamber. When the first electromagnetic valve is opened, the waste gas can be discharged through the first perforated pipes under the action of pressure, so that the pressure in the membrane is reduced to ensure the entry of fresh air. Moreover, since the exhaust ports of the first perforated pipes are directed towards the four corners of the anoxic tank 2, the discharged waste gas can stir the sludge at the corners in the anoxic tank, preventing the occurrence of dead angles.
[0026] A plurality of second perforated pipes 5b for discharging the waste gas in the membrane aeration assembly are arranged below the frame, and a second electromagnetic valve is arranged on the second perforated pipes 5b. The second perforated pipes 5b are connected to the exhaust buffer chamber through a connecting pipe. Preferably, the exhaust ports of the second perforated pipes 5b are directed upwards and aligned with the oxygen-permeable membranes, so that the oxygen-permeable membranes can be directly cleaned. When the exhaust ports are not directed towards the oxygen-permeable membranes, the membrane aeration assembly can be shaken through force and reaction force to achieve cleaning. In addition, a nozzle can be arranged on the exhaust port of the second perforated pipe. When the second electromagnetic valve is opened, the waste gas can be discharged through the second perforated pipes, and the membrane aeration assembly can be cleaned through the discharged waste gas, thereby preventing the sludge from adhering to the membrane aeration assembly.
[0027] A sludge return pipeline is arranged between the sedimentation tank 4 and the anoxic tank 2. Preferably, a gas lifting device is connected to the sludge return pipeline.
[0028] In order to prevent sludge precipitation in the anoxic tank, a pusher 8 for preventing sludge precipitation in the anoxic tank is arranged in the anoxic tank 2. Preferably, a communication port is arranged at the lower part of the partition between the anoxic tank 2 and the aerobic tank 3, and an openable and closable gate 7 is arranged at the position of the communication port, and the pusher is arranged at the communication port, so that when the pusher pushes the liquid away from the communication port, the nitrification liquid in the aerobic tank enters the anoxic tank, thereby realizing nitrification liquid reflux, and by controlling the closing of the openable and closable gate, the control of the nitrification liquid reflux amount can be realized. At present, the nitrification liquid reflux is about three times the volume of the sewage treated by the entire device, compared with the nitrification liquid pipeline reflux, the setting can cancel the water pump for controlling the nitrification liquid reflux from the pipeline, thereby reducing the energy consumption.
[0029] The openable and closable gate comprises a gate and a lead screw for driving the gate to move up and down, the upper end of the lead screw is provided with a rotating handle after penetrating through the box body, a lead screw nut is arranged on the box body and screwed with the lead screw, and the lower end of the lead screw is rotatably arranged on the gate, that is, the openable and closable gate realizes the opening and closing and the adjustment of the opening range through the lead screw nut mechanism, and of course the openable and closable gate can also realize automatic control adjustment through the telescopic cylinder.
Claims
1. An integrated rural domestic sewage treatment device, characterized in that: The enclosure includes a rectangular box (1), which is divided into an anoxic tank (2), an aerobic tank (3), and a sedimentation tank (4) from left to right by partitions. The anoxic tank (2) has a wastewater inlet at the top, the sedimentation tank (4) has a clear water outlet at the top, and the sedimentation tank (4) has a sludge outlet at the bottom. The aerobic tank (3) is equipped with an aeration device, which is connected to a blower (6) through an aeration pipe. The anoxic tank (2) contains a membrane aeration assembly (5) that allows oxygen to pass through. The membrane aeration assembly (5) is connected to the blower (6) through a ventilation pipe. When air enters the membrane aeration assembly (5), the oxygen in the air can pass through the membrane wall of the membrane aeration assembly (5) and enter the anoxic tank.
2. The integrated rural domestic sewage treatment device according to claim 1, characterized in that: The membrane aeration assembly (5) includes a frame and several breathable membranes that allow oxygen to pass through, which are arranged in the frame. The lower end of the frame is provided with a plurality of first perforated pipes (5a) for discharging waste gas from the membrane aeration assembly. The exhaust ports of the first perforated pipes (5a) face the four corners of the anoxic pool (2), and a first solenoid valve is provided on the first perforated pipes (5a).
3. The integrated rural domestic sewage treatment device according to claim 2, characterized in that: Several second perforated pipes (5b) for discharging waste gas from the membrane aeration assembly are laid below the frame, and a second solenoid valve is installed on the second perforated pipes (5b).
4. The integrated rural domestic sewage treatment device according to claim 3, characterized in that: The exhaust port of the second perforated tube (5b) faces upward and is aligned with the breathable membrane.
5. The integrated rural domestic sewage treatment device according to claim 1, characterized in that: A sludge return pipe is provided between the sedimentation tank (4) and the anoxic tank (2), and an air-lift device is connected to the sewage return pipe.
6. The integrated rural domestic sewage treatment device according to claim 1, characterized in that: A connecting port is provided at the lower part of the partition between the anoxic tank (2) and the aerobic tank (3). A controllable gate (7) is provided at the location of the connecting port. A flow promoter (8) is provided in the anoxic tank (2) at the location of the connecting port to prevent sludge from settling in the anoxic tank.
7. The integrated rural domestic sewage treatment device according to claim 6, characterized in that: The controllable gate includes a gate and a screw for moving the gate up and down. The upper end of the screw passes through the housing and is provided with a rotating handle. The housing is provided with a screw nut that is screwed to the screw. The lower end of the screw is rotatably mounted on the gate.
8. The integrated rural domestic sewage treatment device according to claim 1, characterized in that: The lower part of the sedimentation tank is set in a cone shape. An automatic dosing tank (9), an ultraviolet disinfection device, and a blower are installed at the cone position below the sedimentation tank. The automatic dosing tank (9) is used to add phosphorus removal agent or flocculant to the sedimentation tank. The ultraviolet disinfection device is installed on the clear water pipe connected to the clear water outlet. A clear water tee is installed on the clear water pipe. One end of the clear water tee is connected to the outside, and the other end of the clear water tee is connected to the automatic dosing tank.
9. The integrated rural domestic sewage treatment device according to claim 1, characterized in that: There are two sedimentation tanks (4) spaced apart on the left and right, and each sedimentation tank is square.