Mineral synergistic hypoxia biological reaction device

Abstract

The utility model discloses a mineral synergetic hypoxia biological reaction device which comprises a rack, a reactor fixed on the rack, a mineral feeding hopper fixed above an opening part of the reactor, a stirring mechanism arranged in the reactor, and a DO probe arranged in the middle of the reactor, an aeration device is arranged at the bottom of the reactor; an overflow port is formed in the upper part of the reactor and is communicated with the interior of the secondary sedimentation tank through an overflow pipe; the device further comprises a wastewater pool, supernate of the wastewater pool is pumped into the bottom of the reactor through a first peristaltic pump, and sludge on the lower portion of the reactor flows back to the secondary sedimentation pool through a second peristaltic pump. The utility model designs a mineral synergistic low-oxygen biological reaction device, a micro-aerobic biological system in the mineral synergistic low-oxygen biological reaction device can be used for removing high-concentration wastewater, and can maintain very high COD (Chemical Oxygen Demand) and ammonia nitrogen removal rate, the average COD removal rate is 97.1%, the average ammonia nitrogen removal rate is 87.3%, and the micro-aerobic biological reaction device can be used for treating the wastewater with high concentration. After iron salt, aluminum salt and other minerals are added, the phosphorus removal capacity of the micro-aerobic biological system can be enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mineral cooperates low oxygen biological reaction device belongs to sewage treatment equipment technical field. BACKGROUND

[0002] Water body eutrophication is a relatively common environmental problem in China, and the main way to solve water body eutrophication is to control the discharge of nitrogen and phosphorus elements in high concentration wastewater. In order to solve the removal of nitrogen and phosphorus elements in wastewater, most domestic sewage plants use A2 / O process to achieve the effect of denitrification and phosphorus removal. In recent years, it has been found that the micro-aerobic biological system has low energy consumption, complex bacterial flora, diversified material conversion and energy metabolism, and good effect of removing complex pollutants, and can also achieve denitrification and phosphorus removal. It may be a cost-effective alternative to A2 / O process in the future.

[0003] Many minerals in nature as trace elements of organisms will affect the activity of organisms to some extent, strengthen or inhibit the life activities of microorganisms, and according to research, adding minerals can promote microbial enhanced phosphorus removal and improve sludge settling performance. At present, among the added minerals, Fe salt and Al salt are the most representative. Therefore, it is of great significance to add minerals to the micro-aerobic system to strengthen biological treatment of high phosphorus wastewater. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a mineral cooperative low oxygen biological reaction device to solve the technical problems in the prior art.

[0005] The technical scheme adopted by the utility model is as follows: a mineral cooperative low oxygen biological reaction device, comprising a rack, a reactor with an axis arranged along the vertical direction is fixed on the rack, the upper end of the reactor is open, a first mineral feeding hopper and a second mineral feeding hopper are fixed above the opening of the reactor, a stirring mechanism is arranged in the reactor, a DO probe is arranged in the middle part of the reactor, and the DO probe is electrically connected with a DO probe host; an aeration device is arranged at the bottom of the reactor; an overflow port is arranged at the upper part of the reactor, and the overflow port is communicated with the inside of a secondary sedimentation tank through an overflow pipe; further comprising a wastewater tank, the supernatant of the wastewater tank is pumped into the bottom of the reactor through a first peristaltic pump, and the sludge at the lower part of the reactor is returned to the secondary sedimentation tank through a second peristaltic pump.

[0006] Preferably, the first mineral feeding hopper and the second mineral feeding hopper are respectively filled with iron salt and aluminum salt, and the lower parts of the first mineral feeding hopper and the second mineral feeding hopper are respectively provided with a first flap valve and a second flap valve.

[0007] Preferably, the stirring mechanism comprises a stirring paddle, and the stirring paddle is driven by a motor fixed on the rack.

[0008] Preferably, the blade of the stirring paddle is more than two layers.

[0009] Preferably, the aeration device comprises an aeration disc, the aeration disc is connected with an air compressor through a pipeline, and the outlet end of the air compressor is provided with a flow meter.

[0010] Preferably, the air inlet end of the aeration disc is provided with a first check valve.

[0011] Preferably, a second check valve is arranged between the first peristaltic pump and the reactor.

[0012] Preferably, a third check valve is arranged between the second peristaltic pump and the reactor.

[0013] The beneficial effects of the present application are as follows: compared with the prior art, the mineral synergistic low-oxygen biological reaction device is designed, the micro-aerobic biological system in the present application can be used for removing high-concentration wastewater, and can maintain a very high COD and ammonia nitrogen removal rate, the average COD removal rate is 97.1%, the average ammonia nitrogen removal rate is 87.3%, and the phosphorus removal capacity of the micro-aerobic biological system can be enhanced after adding iron salt and aluminum salt and other minerals. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the present application.

[0015] The reference signs in the drawings of the specification include: reactor 1, first mineral feeding hopper 2, first flap valve 3, second mineral feeding hopper 4, second flap valve 5, motor 6, stirring paddle 7, blade 8, DO probe 9, air compressor 10, flow meter 11, first check valve 13, aeration disc 14, wastewater pool 15, first peristaltic pump 16, second check valve 17, second sedimentation tank 18, overflow pipe 19, third check valve 20, second peristaltic pump 21. DETAILED DESCRIPTION

[0016] The present application will be further described below in combination with the drawings and specific embodiments.

[0017] Embodiment 1:

[0018] The mineral synergistic low-oxygen biological reaction device, such as Figure 1As shown, including the rack, the rack is fixed with the reactor 1, the axis is arranged in the vertical direction, the reactor 1 is cylindrical, the reactor 1 is made of acrylic organic glass material, the upper end of the reactor 1 is open, the first mineral feeding hopper 2 and the second mineral feeding hopper 4 are fixed above the mouth of the reactor 1, the first mineral feeding hopper 2 and the second mineral feeding hopper 4 are respectively filled with iron salt and aluminum salt, the lower part of the first mineral feeding hopper 2 and the second mineral feeding hopper 4 is respectively provided with the first flap valve 3 and the second flap valve 5; the first mineral feeding hopper 2 and the second mineral feeding hopper 4 are used to add iron salt and aluminum salt to the inside of the reactor 1;

[0019] The reactor 1 is provided with a stirring mechanism, the stirring mechanism includes a stirring paddle 7, the stirring paddle 7 is driven by a motor 6 fixed on the rack, the blades 8 of the stirring paddle 7 are two layers, respectively located in the lower part and the middle part of the reactor 1; the stirring mechanism is used for stirring the inside of the reactor 1, and accelerates the reaction rate;

[0020] The middle part of the reactor 1 is provided with a DO probe 9, the DO probe 9 is electrically connected with a DO probe host, which is used for monitoring the dissolved oxygen content in the reactor 1;

[0021] The bottom of the reactor 1 is provided with an aeration device, the aeration device includes an aeration disc 14 fixed on the bottom of the reactor 1, the aeration disc 14 is connected with an air compressor 10 through a pipeline, the outlet end of the air compressor 10 is provided with a gas flow meter 11, and the air inlet end of the aeration disc 14 is provided with a first check valve 13; the aeration is realized through the air compressor 10 and the aeration disc 14;

[0022] The upper part of the reactor 1 is provided with an overflow port, the overflow port is communicated with the middle part of the secondary sedimentation tank through an overflow pipe 19; further comprising a wastewater tank 15, the supernatant of the wastewater tank 15 is pumped into the bottom of the reactor 1 through a first peristaltic pump 16, a second check valve 17 is arranged between the first peristaltic pump 16 and the reactor 1, the sludge at the lower part of the reactor 1 is backflowed to the bottom of the secondary sedimentation tank through a second peristaltic pump 21, and a third check valve 20 is arranged between the second peristaltic pump 21 and the reactor 1;

[0023] The high-concentration sewage in the reactor 1 comes from the wastewater tank 15, the continuous water inlet is pumped into through the first peristaltic pump 16, the mechanical stirring paddle 7 in the reactor 1 is continuously stirred to ensure uniform mixing, the aeration is realized through the air compressor 10 and the aeration disc 14, and the aeration amount is controlled through the gas flow meter 11, the reactor 1 reaches the aeration stable condition by controlling the time intermittent aeration and controlling a certain sludge backflow, the aeration cycle is that the aeration is 1 minute, the aeration is stopped for 4 minutes, and the overflow water is used for the water discharge of the reactor 1.

[0024] After the reaction reaches stability, the nitrogen and phosphorus in the high concentration wastewater are treated by adding the iron salt into the reactor 1 through the first mineral feeding hopper 2 first, and then adding the aluminum salt into the reactor 1 through the second mineral feeding hopper 4.

[0025] It is verified through experiments that:

[0026] The ammonia nitrogen removal rate is very low when the reactor 1 is started, because the dissolved oxygen control is poor when the reactor 1 is started, so that the ammonia oxidation bacteria cannot play a good role, when the sludge concentration meets the requirements and the dissolved oxygen in the water is controlled stably, the ammonia oxidation bacteria in the water gradually improve the removal rate of ammonia nitrogen, on the 24th day of operation, the removal of ammonia nitrogen in the reactor 1 reaches stability. After the system is stable, the influent and effluent concentrations of ammonia nitrogen are 230.4 mg / L and 27.1 mg / L respectively, and the average removal rate of ammonia nitrogen is 87.3%. As can be seen, the micro-aerobic biological treatment system is successfully operated, and the stable ammonia nitrogen removal effect is achieved.

[0027] After adding the iron salt, the presence of FeOOH can be obviously observed by analyzing the sludge in the precipitate product by an X-ray diffractometer, thereby proving that the added Fe3+ can be hydrolyzed to generate FeOOH and further complete the adsorption of phosphate, so as to strengthen the removal of phosphate by the system.

[0028] After adding the PAC, the PAC has a great improvement on the removal of phosphate in the system, when Al:P=1:1, the PAC can play a major role and strengthen the phosphorus removal.

[0029] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application, therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A mineral-coordinated low-oxygen bioreactor, characterized in that: The reactor includes a frame on which a reactor with its axis arranged vertically is fixed. The reactor has an opening at its upper end, and a first mineral feed hopper and a second mineral feed hopper are fixed above the opening. A stirring mechanism is installed inside the reactor, and a DO probe is installed in the middle of the reactor, electrically connected to a DO probe host. An aeration device is installed at the bottom of the reactor. An overflow port is installed at the top of the reactor, and the overflow port is connected to the interior of a secondary sedimentation tank through an overflow pipe. The reactor also includes a wastewater tank, on which the supernatant is pumped into the bottom of the reactor by a first peristaltic pump, and the sludge at the bottom of the reactor is returned to the secondary sedimentation tank by a second peristaltic pump.

2. The mineral-coordinated low-oxygen bioreactor according to claim 1, characterized in that: The first mineral feeding hopper and the second mineral feeding hopper are respectively filled with iron salt and aluminum salt, and the lower part of the first mineral feeding hopper and the second mineral feeding hopper are respectively provided with a first flap valve and a second flap valve.

3. The mineral-coordinated low-oxygen bioreactor according to claim 1, characterized in that: The stirring mechanism includes a stirring paddle, which is driven by a motor fixed to the frame.

4. The mineral-coordinated low-oxygen bioreactor according to claim 3, characterized in that: The impeller blades have two or more layers.

5. The mineral-coordinated low-oxygen bioreactor according to claim 1, characterized in that: The aeration device includes an aeration disc, which is connected to an air compressor via a pipe, and a flow meter is installed at the outlet of the air compressor.

6. The mineral-coordinated low-oxygen bioreactor according to claim 5, characterized in that: The air inlet end of the aeration disc is equipped with a first one-way valve.

7. The mineral-coordinated low-oxygen bioreactor according to claim 1, characterized in that: A second check valve is provided between the first peristaltic pump and the reactor.

8. The mineral-coordinated low-oxygen bioreactor according to claim 1, characterized in that: A third check valve is provided between the second peristaltic pump and the reactor.

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