AO biochemical treatment tank for treating sewage

Abstract

The utility model relates to the technical field of sewage treatment, and discloses an AO biochemical treatment tank for treating sewage, which comprises a treatment tank body, a water distribution aeration part and a stirring inner wall cleaning part, and an anaerobic tank and an aerobic tank are respectively arranged in the treatment tank body. According to the utility model, the water distribution pipe is communicated with the communicating block and the water inlet connecting pipe, so that sewage can be uniformly distributed to each area of the anaerobic tank, and organic matters in the sewage can be in full contact with anaerobic microorganisms, so that an anaerobic reaction can be effectively carried out in the whole anaerobic tank; the situation that the treatment effect is poor due to the fact that the concentration of sewage in a local area is too high or too low is avoided, an air blower is connected with an aeration ring pipe through a connecting bent pipe and a connecting pipe, air is conveyed into an aerobic tank, aeration heads on the aeration ring pipe can evenly release the air into the sewage in the form of tiny bubbles, oxygen is provided for aerobic microorganisms, and the treatment effect is improved. The oxygenolysis of aerobic microorganisms on organic matters in the sewage is promoted.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an AO biochemical treatment tank for treating wastewater. Background Technology

[0002] Traditional AO biological treatment tanks have rudimentary water distribution systems, often resulting in uneven wastewater flow between the anaerobic and aerobic tanks. This leads to localized areas with excessively high or low wastewater concentrations. High-concentration areas experience excessive microbial load and poor treatment efficiency, while low-concentration areas suffer from suppressed microbial activity and significant resource waste, drastically reducing overall treatment efficiency. In the aeration stage, improper layout and aeration methods result in uneven dissolved oxygen distribution in the aerobic tank. Some areas suffer from insufficient dissolved oxygen, affecting aerobic microbial metabolism, while others have excess dissolved oxygen, leading to energy waste. Furthermore, aeration equipment is prone to clogging, difficult to maintain, and frequent repairs increase operating costs.

[0003] During operation, sludge and impurities easily adhere to the walls of the aerobic tank. Over time, these sludge deposits accumulate, not only occupying valuable space within the tank but also breeding harmful microorganisms and affecting water quality. Manual cleaning is difficult, costly, and poses safety risks. Furthermore, the treatment tank lacks a precise water level monitoring and control system, and cannot automatically adjust in a timely manner when the water level fluctuates. This can easily lead to situations where the water level is too high, causing sewage to overflow, or too low, affecting the normal operation of the equipment, seriously threatening the stable operation of the sewage treatment system. Utility Model Content

[0004] The purpose of this invention is to provide an AO biological treatment tank for treating sewage, which solves the technical problems of uneven water distribution, poor aeration effect, and easy accumulation of sludge on the tank wall in traditional AO biological treatment tanks, and achieves the purpose of uniform water distribution, effective aeration, and automatic cleaning of sludge on the tank wall.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an AO biochemical treatment tank for treating wastewater, comprising a treatment tank body, a water distribution and aeration section, and a stirring and inner wall cleaning section. The treatment tank body is provided with an anaerobic tank and an aerobic tank respectively. The water distribution and aeration section is respectively located inside the anaerobic tank and the aerobic tank and on the outer wall of the treatment tank body. The stirring and inner wall cleaning section is respectively located at the top and inside of the aerobic tank.

[0006] Preferably, the water distribution and aeration unit specifically includes: a fixed support frame, fixedly installed on the top outer wall of the treatment tank; an anaerobic water level sensor, installed on the outer wall of the treatment tank; an aerobic water level sensor, installed on the outer wall of the treatment tank; a support fixing plate, fixedly installed on the outer wall of the treatment tank; a solenoid valve drain bend, connected to the outer wall of the treatment tank; and a solenoid drain valve pipe, connected to the outer wall of the treatment tank.

[0007] Preferably, the sensing ends of the anaerobic water level sensor and the aerobic water level sensor both movably penetrate the outer wall of the treatment tank and extend into the interior of the anaerobic tank and the aerobic tank, respectively. The bottom outer wall of the fixed support frame is equidistantly equipped with connecting blocks, and the interior of the connecting blocks is provided with connecting cavities.

[0008] Anaerobic and aerobic water level sensors are installed to monitor the water levels in the anaerobic and aerobic tanks in real time. When the water level reaches the upper limit, a signal is promptly sent to control the inlet components (such as the inlet pipe and distribution pipe) to stop water intake, preventing sewage from overflowing and causing environmental pollution. Conversely, when the water level drops to the lower limit, a signal is quickly sent to initiate water intake, preventing the tanks from drying out and ensuring the normal survival and function of microorganisms in both anaerobic and aerobic environments. The water level sensors work in conjunction with the distribution components (such as connecting blocks, inlet pipes, and distribution pipes) to rationally distribute sewage according to the water level. When the water level is low, the distribution speed and flow rate can be appropriately increased to ensure even distribution of sewage within the tank; when the water level approaches the upper limit, the distribution is reduced to prevent localized high water levels. This increases the contact area between sewage and microorganisms, enhancing the treatment effect.

[0009] Preferably, the top of the connecting block is symmetrically connected with a water inlet pipe, and the bottom outer wall of the connecting block is equidistantly connected with a water distribution pipe. The water distribution pipe is connected to the connecting cavity, the water inlet pipe is connected to the connecting cavity, the water distribution pipe is located inside the anaerobic tank, one end of the solenoid valve drain bend is connected to the anaerobic tank, and the other end of the solenoid valve drain bend extends to the top of the aerobic tank.

[0010] Preferably, one end of the electromagnetic drain valve pipe is connected to the aerobic tank, a blower is fixedly installed on the top outer wall of the fixed support frame, the output end of the blower is connected to a connecting bend, and the other end of the connecting bend movably penetrates the outer wall of the treatment tank and extends into the interior of the aerobic tank.

[0011] A blower is installed, which delivers air through connecting bends and pipes to the aeration ring pipe. The air is then released into the wastewater in the aerobic tank as tiny bubbles from the aeration heads. This significantly increases the dissolved oxygen content in the wastewater, creating an ideal living environment for aerobic microorganisms. The aeration effect of the blower works in conjunction with the stirring rods, blades, and scrapers of the inner wall cleaning unit. The combined effect of the water flow generated by aeration and the mechanical stirring of the agitator creates a stronger mixing flow in the aerobic tank. This not only facilitates the decomposition of organic matter but also enhances the cleaning effect of the inner wall scrapers on the inner wall of the aerobic tank, preventing sludge and impurities from adhering to the inner wall and maintaining the cleanliness and normal operation of the aerobic tank.

[0012] Preferably, the other end of the connecting bend is connected to a connecting pipe, and the other end of the connecting pipe is connected to an aeration ring pipe. The aeration ring pipes are equidistantly arranged inside the aerobic tank and are connected to each other through a connecting pipe. Aeration heads are equidistantly arranged on the top outer wall of each aeration ring pipe, and support blocks are equidistantly arranged on the bottom outer wall of each aeration ring pipe. The top outer wall of each support block has an installation groove. The support block is fixedly installed on the bottom of the inner wall of the aerobic tank, and the aeration ring pipe is adapted to the installation groove.

[0013] Preferably, the stirring inner wall cleaning part specifically includes: a second support fixing plate, which is fixedly installed on the top outer wall of the treatment tank; a drive motor, which is fixedly installed on the top outer wall of the second support fixing plate; and an inner wall scraper, which is circumferentially and equidistantly arranged inside the aerobic tank.

[0014] Preferably, the output end of the drive motor is fixedly connected to a stirring rod, the other end of the stirring rod movably penetrates the top outer wall of the second support fixing plate and extends into the interior of the aerobic tank, the outer wall of the stirring rod is fixedly connected with connecting fixing rods at equal intervals, the other end of the connecting fixing rod is fixedly connected to the outer wall of the inner wall scraper, and the outer wall of the stirring rod is fixedly installed with stirring blades at equal intervals.

[0015] The system is equipped with stirring blades. When wastewater enters the treatment tank, the rotation of the stirring blades can quickly agitate the incoming wastewater, allowing the newly entered wastewater to spread rapidly to all corners of the treatment tank. This prevents localized areas from having excessively high or low wastewater concentrations, resulting in more uniform water distribution. This helps the microorganisms in the aerobic tank to fully contact the wastewater, improving the decomposition efficiency of organic matter in the wastewater.

[0016] This invention provides an AO biological treatment tank for treating wastewater. It has the following beneficial effects:

[0017] (1) This utility model connects the water distribution pipe with the connecting block and the inlet pipe, which can evenly distribute the sewage to various areas of the anaerobic tank. The organic matter in the sewage can fully contact the anaerobic microorganisms, so that the anaerobic reaction can be carried out effectively in the entire anaerobic tank. This avoids the situation where the treatment effect is not good in some areas due to the sewage concentration being too high or too low. The blower is connected to the aeration ring pipe through the connecting bend and connecting pipe, and delivers air to the aerobic tank. The aeration head on the aeration ring pipe can evenly release air into the sewage in the form of tiny bubbles, providing oxygen for the aerobic microorganisms and promoting the oxidation and decomposition of organic matter in the sewage by the aerobic microorganisms.

[0018] (2) This utility model uses a drive motor to rotate the stirring rod and stirring blades, which enables the wastewater, microorganisms, dissolved oxygen, etc. in the aerobic tank to be fully mixed. The organic matter in the wastewater can come into contact with the aerobic microorganisms more quickly, accelerating the oxidation and decomposition reaction, thereby improving the removal efficiency of pollutants in the wastewater during the aerobic treatment stage. The stirring rod is connected to the inner wall scraper through a connecting fixed rod. During the stirring process, the inner wall scraper will rotate along the inner wall of the aerobic tank, which can effectively scrape off the sludge, impurities and other dirt attached to the tank wall. This prevents the accumulation of dirt from affecting the structural strength and treatment effect of the tank, and also avoids the growth of bacteria in the dirt, which would affect the water quality. Attached Figure Description

[0019] Figure 1 This is a frontal perspective view of the overall structure of this utility model;

[0020] Figure 2 This is a partial view of the water distribution and aeration section of this utility model;

[0021] Figure 3 This is a partial view of the water distribution and aeration section of this utility model;

[0022] Figure 4 This is a partial sectional view of the cleaning section of the inner wall of the mixer in this utility model.

[0023] In the diagram: 1. Treatment tank, 2. Anaerobic tank, 3. Water distribution and aeration section, 311. Fixed support frame, 312. Connecting block, 313. Inlet pipe, 314. Water distribution pipe, 315. Anaerobic water level sensor, 316. Aerobic water level sensor, 317. Solenoid valve drain bend, 318. Solenoid drain valve pipe, 319. Blower, 3111. Support fixing plate one, 3112. Connecting bend, 3113. Support block, 3114. Aeration ring pipe, 3115. Connecting pipe, 3116. Aeration head, 3117. Connecting pipe, 4. Mixing inner wall cleaning section, 411. Support fixing plate two, 412. Drive motor, 413. Mixing rod, 414. Connecting fixing rod, 415. Mixing blade, 416. Inner wall scraper, 5. Aerobic tank. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] Example 1:

[0027] Addressing the problems of uneven water distribution, poor aeration, and sludge accumulation on the walls in traditional AO biological treatment tanks, this invention provides a preferred embodiment of an AO biological treatment tank for wastewater treatment, for example... Figures 1-4 As shown:

[0028] An AO biochemical treatment tank for treating wastewater includes a treatment tank body 1, a water distribution and aeration section 3, and a stirring and inner wall cleaning section 4. An anaerobic tank 2 and an aerobic tank 5 are respectively opened inside the treatment tank body 1. The water distribution and aeration section 3 is respectively located inside the anaerobic tank 2 and the aerobic tank 5 and on the outer wall of the treatment tank body 1. The stirring and inner wall cleaning section 4 is respectively located at the top and inside of the aerobic tank 5.

[0029] The water distribution and aeration unit 3 specifically includes: a fixed support frame 311, which is fixedly installed on the top outer wall of the treatment tank 1; an anaerobic water level sensor 315, which is installed on the outer wall of the treatment tank 1; an aerobic water level sensor 316, which is installed on the outer wall of the treatment tank 1; a support fixing plate 3111, which is fixedly installed on the outer wall of the treatment tank 1; a solenoid valve drain bend 317, which is connected to the outer wall of the treatment tank 1; and a solenoid drain valve pipe 318, which is connected to the outer wall of the treatment tank 1.

[0030] The sensing ends of the anaerobic water level sensor 315 and the aerobic water level sensor 316 both movably penetrate the outer wall of the treatment tank 1 and extend into the interior of the anaerobic tank 2 and the aerobic tank 5, respectively. The bottom outer wall of the fixed support frame 311 is equidistantly equipped with connecting blocks 312, and the interior of the connecting blocks 312 is provided with connecting cavities.

[0031] The top of the connecting block 312 is symmetrically connected with an inlet pipe 313, and the bottom outer wall of the connecting block 312 is equidistantly connected with a water distribution pipe 314. The water distribution pipe 314 is connected to the connecting cavity, and the inlet pipe 313 is connected to the connecting cavity. The water distribution pipe 314 is located inside the anaerobic tank 2. One end of the solenoid valve drain bend 317 is connected to the anaerobic tank 2, and the other end of the solenoid valve drain bend 317 extends to the top of the aerobic tank 5.

[0032] One end of the electromagnetic drain valve pipe 318 is connected to the aerobic tank 5. A blower 319 is fixedly installed on the top outer wall of the fixed support frame 311. The output end of the blower 319 is connected to a connecting bend 3112. The other end of the connecting bend 3112 movably passes through the outer wall of the treatment tank 1 and extends into the interior of the aerobic tank 5.

[0033] The other end of the connecting bend 3112 is connected to a connecting pipe 3117, and the other end of the connecting pipe 3117 is connected to an aeration ring pipe 3114. The aeration ring pipes 3114 are equidistantly arranged inside the aerobic tank 5 and are connected to each other by a connecting pipe 3115. Aeration heads 3116 are equidistantly arranged on the top outer wall of the aeration ring pipe 3114, and support blocks 3113 are equidistantly arranged on the bottom outer wall of the aeration ring pipe 3114. The top outer wall of the support block 3113 has an installation groove, and the support block 3113 is fixedly installed on the bottom of the inner wall of the aerobic tank 5. The aeration ring pipe 3114 is adapted to the installation groove.

[0034] In this embodiment, the blower 319 at the top of the fixed support frame 311 is started, delivering air to the connecting bend 3112. The air enters the connecting pipe 3117 through the connecting bend 3112, and then enters the aeration ring pipe 3114 through the connecting pipe 3117. The air in the aeration ring pipe 3114 is evenly released into the wastewater of the aerobic tank 5 in the form of tiny bubbles through the aeration head 3116 at the top, providing sufficient oxygen for the aerobic microorganisms and promoting the aerobic decomposition reaction. The aerobic water level sensor 316 monitors the water level in the aerobic tank 5 in real time, and its sensing end feeds back the water level information to the control system. The aeration head on the aeration ring pipe can evenly release air into the wastewater in the form of tiny bubbles, providing oxygen for the aerobic microorganisms and promoting the oxidation and decomposition of organic matter in the wastewater by the aerobic microorganisms.

[0035] Example 2:

[0036] Please see Figures 1-4 Furthermore, based on Example 1, the following is obtained: the stirring inner wall cleaning part 4 specifically includes: a second support fixing plate 411, which is fixedly installed on the top outer wall of the treatment tank 1; a drive motor 412, which is fixedly installed on the top outer wall of the second support fixing plate 411; and an inner wall scraper 416, which is circumferentially and equidistantly arranged inside the aerobic tank 5.

[0037] A stirring rod 413 is fixedly connected to the output end of the drive motor 412. The other end of the stirring rod 413 movably passes through the top outer wall of the support fixing plate 411 and extends into the interior of the aerobic tank 5. A connecting fixing rod 414 is fixedly connected at equal intervals around the outer circumference of the stirring rod 413. The other end of the connecting fixing rod 414 is fixedly connected to the outer wall of the inner wall scraper 416. A stirring blade 415 is fixedly installed at equal intervals around the outer circumference of the stirring rod 413.

[0038] In this embodiment, the drive motor 412 on the top of the supporting fixed plate 411 starts, driving the stirring rod 413 to rotate. The stirring blades 415 on the stirring rod 413 rotate with the stirring rod 413, stirring the sewage in the aerobic tank 5, so that the sewage, microorganisms and dissolved oxygen are fully mixed, improving the aerobic treatment efficiency. The stirring rod 413 drives the inner wall scraper 416 to rotate along the inner wall of the aerobic tank 5 through the connecting fixed rod 414, scraping off the sludge and impurities attached to the tank wall. This effectively removes sludge, impurities and other dirt attached to the tank wall, preventing dirt accumulation from affecting the structural strength and treatment effect of the tank, and also avoiding the growth of bacteria on the dirt, which would affect the water quality.

[0039] Working principle: When in use;

[0040] Step 1: Wastewater enters the anaerobic tank

[0041] Wastewater flows into the communicating cavity in the communicating block 312 at the bottom of the fixed support frame 311 through the inlet pipe 313. The wastewater in the communicating cavity is evenly distributed into the anaerobic tank 2 through the water distribution pipe 314.

[0042] Step 2: Anaerobic water level sensor 315 monitors the water level in anaerobic tank 2 in real time. Its sensing end feeds back the water level information to the control system. When the sewage in anaerobic tank 2 reaches a certain treatment level, the control system controls the solenoid valve drain bend 317 to open according to the water level, and transports the treated sewage in anaerobic tank 2 to the top of aerobic tank 5.

[0043] Step 3: The blower 319 at the top of the fixed support frame 311 is started, which delivers air to the connecting bend 3112. The air enters the connecting pipe 3117 through the connecting bend 3112, and then enters the aeration ring pipe 3114 through the connecting pipe 3117. The air in the aeration ring pipe 3114 is evenly released into the wastewater of the aerobic tank 5 in the form of tiny bubbles through the aeration head 3116 at the top, providing sufficient oxygen for the aerobic microorganisms and promoting the aerobic decomposition reaction. The aerobic water level sensor 316 monitors the water level in the aerobic tank 5 in real time, and its sensing end feeds back the water level information to the control system.

[0044] Step 4: The drive motor 412 on the top of the support plate 2 411 starts, driving the stirring rod 413 to rotate. The stirring blades 415 on the stirring rod 413 rotate with the stirring rod 413, stirring the sewage in the aerobic tank 5, so that the sewage, microorganisms and dissolved oxygen are fully mixed, improving the aerobic treatment efficiency. The stirring rod 413 drives the inner wall scraper 416 to rotate along the inner wall of the aerobic tank 5 through the connecting fixing rod 414, scraping off the sludge and impurities attached to the tank wall.

[0045] Step 5: When the wastewater in aerobic tank 5 reaches the discharge standard and the water level is appropriate, the control system controls the electromagnetic drain valve 318 to open, and discharge the treated water from aerobic tank 5 into the treatment tank.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An AO biochemical treatment tank for treating wastewater, comprising a treatment tank body (1), a water distribution and aeration section (3), and a stirring and inner wall cleaning section (4), characterized in that: The treatment tank (1) is provided with an anaerobic tank (2) and an aerobic tank (5) respectively; the water distribution and aeration part (3) is respectively provided inside the anaerobic tank (2) and the aerobic tank (5) and on the outer wall of the treatment tank (1); the stirring inner wall cleaning part (4) is respectively provided on the top and inside of the aerobic tank (5).

2. The AO biological treatment tank for treating wastewater according to claim 1, characterized in that: The water distribution and aeration section (3) specifically includes: A fixed support frame (311) is fixedly installed on the top outer wall of the treatment tank body (1); An anaerobic water level sensor (315) is installed on the outer wall of the treatment tank (1); An aerobic water level sensor (316) is installed on the outer wall of the treatment tank (1); Support plate 1 (3111) is fixedly installed on the outer wall of the treatment tank body (1); The solenoid valve drain bend (317) is connected to the outer wall of the treatment tank (1); The electromagnetic drain valve pipe (318) is connected to the outer wall of the treatment tank (1).

3. The AO biochemical treatment tank for treating wastewater according to claim 2, characterized in that: The sensing ends of the anaerobic water level sensor (315) and the aerobic water level sensor (316) both movably penetrate the outer wall of the treatment tank (1) and extend into the interior of the anaerobic tank (2) and the aerobic tank (5), respectively. The bottom outer wall of the fixed support frame (311) is equidistantly equipped with connecting blocks (312), and the interior of the connecting blocks (312) is provided with connecting cavities.

4. The AO biochemical treatment tank for treating wastewater according to claim 3, characterized in that: The top of the connecting block (312) is symmetrically connected with an inlet pipe (313), and the bottom outer wall of the connecting block (312) is equidistantly connected with a water distribution pipe (314). The water distribution pipe (314) is connected to the connecting cavity, and the inlet pipe (313) is connected to the connecting cavity. The water distribution pipe (314) is located inside the anaerobic tank (2). One end of the solenoid valve drain bend (317) is connected to the anaerobic tank (2), and the other end of the solenoid valve drain bend (317) extends to the top of the aerobic tank (5).

5. The AO biological treatment tank for treating wastewater according to claim 4, characterized in that: One end of the electromagnetic drain valve pipe (318) is connected to the aerobic tank (5). A blower (319) is fixedly installed on the top outer wall of the fixed support frame (311). The output end of the blower (319) is connected to a connecting bend (3112). The other end of the connecting bend (3112) movably penetrates the outer wall of the treatment tank (1) and extends into the interior of the aerobic tank (5).

6. The AO biological treatment tank for treating wastewater according to claim 5, characterized in that: The other end of the connecting bend (3112) is connected to a connecting pipe (3117), and the other end of the connecting pipe (3117) is connected to an aeration ring pipe (3114). The aeration ring pipes (3114) are equidistantly arranged inside the aerobic tank (5). The aeration ring pipes (3114) are connected to each other through a connecting pipe (3115). The top outer wall of the aeration ring pipe (3114) is equidistantly connected with aeration heads (3116). The bottom outer wall of the aeration ring pipe (3114) is equidistantly connected with support blocks (3113). The top outer wall of the support block (3113) is provided with an installation groove. The support block (3113) is fixedly installed at the bottom of the inner wall of the aerobic tank (5). The aeration ring pipe (3114) is adapted to the installation groove.

7. The AO biological treatment tank for treating wastewater according to claim 1, characterized in that: The stirring inner wall cleaning section (4) specifically includes: Support plate 2 (411) is fixedly installed on the top outer wall of the treatment tank body (1); The drive motor (412) is fixedly installed on the top outer wall of the support fixing plate two (411); The inner wall scraper (416) is circumferentially and equidistantly arranged inside the aerobic tank (5).

8. The AO biological treatment tank for treating wastewater according to claim 7, characterized in that: The output end of the drive motor (412) is fixedly connected to a stirring rod (413). The other end of the stirring rod (413) movably passes through the top outer wall of the support fixing plate two (411) and extends into the interior of the aerobic tank (5). The outer wall of the stirring rod (413) is fixedly connected with connecting fixing rods (414) at equal intervals. The other end of the connecting fixing rod (414) is fixedly connected to the outer wall of the inner wall scraper (416). The outer wall of the stirring rod (413) is fixedly installed with stirring blades (415) at equal intervals.

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