A fixed biofilm micro-powered sewage purification tank

Abstract

The present invention discloses a fixed biofilm micro-powered sewage purification tank, comprising: a barrel, an anaerobic chamber, an aeration chamber, a deep purification chamber, and a sedimentation chamber, each of which is provided with a biofilm net column fixedly connected to the anaerobic chamber, the aeration chamber is filled with filamentous rope-shaped biological fillers; and the deep purification chamber is filled with spherical heavy-density biological fillers; a pneumatic pipette, which is fixed in the middle of the deep purification chamber, and the liquid outlet end of the pneumatic pipette is connected to the sedimentation chamber; an aerator, which is connected to the pneumatic pipette; a pneumatic sludge nitrification liquid reflux component, which is provided in the deep purification chamber; and a main aeration pipe, which is provided at the bottom of the aeration chamber. While ensuring the sewage treatment effect, the present invention uses only one power device and can continuously treat sewage, with the beneficial effects of reduced energy consumption, stable operation, and simple operation and maintenance.

Description

Technical Field

[0001] The present invention relates to a sewage purification tank, and more particularly to a fixed biofilm micro-power sewage purification tank. Background Art

[0002] A septic tank is a small-scale domestic sewage treatment device used to treat dispersed or similar domestic sewage. After entering the septic tank, the sewage undergoes pretreatment in a sedimentation and separation tank to remove heavier particles and suspended solids, improving the biodegradability of the sewage. The pre-filtration tank contains filler, where the anaerobic biofilm on the filler removes soluble organic matter. The aeration chamber integrates aeration, high filtration rates, and suspended solids retention.

[0003] In existing technologies, lift pumps are typically used to lift sewage from regulating tanks for hydraulic propulsion. Furthermore, to achieve effective purification, septic tanks often employ multiple power units. This increases energy consumption while achieving effective sewage purification, hindering environmental protection and increasing the cost of sewage purification. Furthermore, when large quantities of sewage flow into septic tanks, untreated sewage that does not meet standards is directly discharged, significantly impacting treatment effectiveness.

[0004] Therefore, a fixed biofilm micro-power sewage purification tank that uses only one power equipment while ensuring the sewage treatment effect, does not need to lift sewage from the regulating tank, can prevent a large amount of sewage from pouring in, effectively prevents direct discharge of sewage that does not meet the treatment standards, and can continuously treat sewage, with reduced energy consumption, stable operation, and simple operation and maintenance, is particularly important. Summary of the Invention

[0005] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0006] In order to achieve these purposes and other advantages according to the present invention, a fixed biofilm micro-powered sewage purification tank is provided, which is characterized by comprising:

[0007] The barrel body is provided with an anaerobic chamber, an aeration chamber, a deep purification chamber and a sedimentation chamber respectively. The anaerobic chamber is fixedly connected to a biofilm net column, the anaerobic chamber is connected to the middle and bottom of the aeration chamber, and a water inlet pipe for connecting to the regulating tank is provided on one side of the top of the anaerobic chamber. The aeration chamber is filled with filamentous rope-shaped biological filler; the bottom of the aeration chamber is connected to the bottom of the deep purification chamber, and the deep purification chamber is filled with spherical heavy-density biological filler. The top of the sedimentation chamber is provided with a drain pipe;

[0008] A pneumatic pipette, which is fixedly connected to the middle of the deep purification chamber, and the liquid outlet end of the pneumatic pipette is connected to the precipitation chamber;

[0009] an aerator, which is in communication with the pneumatic pipette;

[0010] A pneumatic sludge nitrification liquid reflux component is provided in the deep purification chamber and is pneumatically connected to the aerator, with the liquid outlet of the pneumatic sludge nitrification liquid reflux component being located above the biofilm forming net column;

[0011] A main aeration pipe is arranged at the bottom of the aeration bin, and the main aeration pipe is connected to the aerator.

[0012] Preferably, the biological membrane column comprises:

[0013] A first cylindrical barrel, which is fixedly connected to the middle position inside the anaerobic chamber;

[0014] The first biofilm-hanging net for attaching anaerobic biofilm is fixedly arranged in the first cylindrical barrel.

[0015] Preferably, the invention further comprises a pneumatic sludge discharge assembly, which comprises:

[0016] a first pressurized cylinder vertically disposed in the sedimentation bin, wherein the bottom end of the first pressurized cylinder abuts against the bottom end of the sedimentation bin, and the top of the first pressurized cylinder is connected to the aerator via a first pipe, wherein the first pipe is connected to a first airflow switch;

[0017] A sludge discharge pipe, one end of which is arranged through the first pressurizing cylinder, one end of which is close to the bottom end of the sedimentation bin, and the other end of which is arranged through the outside of the barrel.

[0018] Preferably, it further comprises a micro aeration pipe, which is arranged at the bottom of the deep purification chamber, and the micro aeration pipe is connected to the aerator.

[0019] Preferably, the pneumatic pipette comprises:

[0020] A shell having a liquid inlet at the bottom end, which is fixedly connected to the middle part of the deep purification chamber;

[0021] an aeration pipe, one end of which is disposed through the housing, and the other end of which is connected to the aerator;

[0022] A water outlet pipe, one end of which is disposed through the shell, and the other end of which is disposed through the top of the sedimentation bin;

[0023] a gas-liquid connecting pipe, one end of which is connected to one end of the aeration pipe, and the other end of which is connected to one end of the water outlet pipe;

[0024] A U-shaped tube, one end of which is connected to one end of the water outlet pipe, and the other end of the U-shaped tube is located above the gas-liquid connecting pipe;

[0025] A one-way check valve for ensuring the internal pressure of the shell is arranged at the liquid inlet of the shell.

[0026] Preferably, a second cylindrical barrel is fixedly connected to the middle position inside the sedimentation tank, a second biofilm-hanging net for attaching a biofilm to adsorb free sludge is provided in the second cylindrical barrel, and the top end of the second cylindrical barrel is connected to the other end of the outlet pipe.

[0027] Preferably, the pneumatic sludge nitrification liquid reflux component includes:

[0028] a second pressurized cylinder vertically disposed in the deep purification chamber, wherein the bottom end of the second pressurized cylinder abuts against the bottom end of the deep purification chamber, and the top of the second pressurized cylinder is connected to the aerator via a second pipe;

[0029] A delivery pipe, one end of which is arranged through the second pressurized cylinder, one end of the delivery pipe is close to the bottom end of the deep purification chamber, and the other end of the delivery pipe is connected to the top end of the first cylindrical cylinder.

[0030] Preferably, the top of the barrel body is provided with a first inspection port through the anaerobic chamber, and the first inspection port is connected to a first cover; the top of the barrel body is provided with a second inspection port through the aeration chamber, and the second inspection port is connected to a second cover; the top of the barrel body is provided with a third inspection port through the sedimentation chamber, and the third inspection port is connected to a third cover.

[0031] Preferably, the second pipeline is connected to a second airflow switch for adjusting and controlling the reflux volume.

[0032] Preferably, the control switch of the aerator is configured as a liquid level switch, and the liquid level switch is fixedly connected to the outside of the pneumatic pipette.

[0033] The present invention has at least the following beneficial effects:

[0034] First, the main advantage of the present invention over existing septic tanks or micro-power equipment is that it uses a pneumatic pipette to push the flow, omitting power equipment such as sewage lifting pumps and sludge return pumps. Under the premise of ensuring the sewage treatment effect, only one power equipment is used, and sewage treatment can be carried out continuously. Under the hydraulic push of the pneumatic pipette, the anaerobic chamber, aeration chamber and deep treatment chamber will clear out an equal amount of storage space, thereby achieving the purpose of regulating the quality and quantity of sewage. In addition, the present invention does not need to lift sewage from the regulating tank, and can prevent a large amount of sewage from pouring into the septic tank, thereby effectively preventing sewage from being directly discharged without meeting the treatment standards, and has the beneficial effects of reducing energy consumption, stable operation, and simple operation and maintenance.

[0035] Secondly, in the present invention, a first airflow switch is provided to control the opening and closing of the pneumatic sludge discharge assembly. When sludge discharge is not required, the first airflow switch is closed to reduce energy consumption, and the first airflow switch is opened again when sludge discharge is required. The second airflow switch is provided to adjust the reflux volume of the pneumatic sludge nitrification liquid return assembly according to the concentration of the nitrification liquid, further ensuring the denitrification effect of the wastewater, thereby ensuring the essence of the wastewater.

[0036] Third, the liquid level switch provided in the present invention allows the aerator to start purifying the wastewater when the water level in the deep purification chamber rises, triggering the switch. When the water level in the deep purification chamber is insufficient to trigger the switch, the aerator stops, ensuring continuous wastewater treatment and enhancing applicability.

[0037] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of the present invention.

[0039] Figure 2 Schematic diagram of sewage flow according to the present invention.

[0040] Figure 3 It is a schematic diagram of the external structure of the present invention.

[0041] Figure 4 Schematic diagram of the structure of the pneumatic pipette of the present invention.

[0042] Figure 5 It is a flow diagram of the pneumatic pipette of the present invention in the liquid-intake state.

[0043] Figure 6 It is a flow diagram of the pneumatic pipette of the present invention in the pipetting state.

[0044] Figure 7 Schematic diagram of the flow direction of the pneumatic pipette of the present invention when it is in a stopped state. DETAILED DESCRIPTION

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0046] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0047] It should be noted that in the description of the present invention, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings. These are intended solely to facilitate and simplify the description of the present invention and do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Furthermore, in the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] Figure 1 An implementation form of the present invention is shown, which includes:

[0051] The barrel body 1 is provided with an anaerobic chamber 16, an aeration chamber 11, a deep purification chamber 12 and a sedimentation chamber 13, and a biological film net column 161 is fixedly connected to the anaerobic chamber 16. The anaerobic chamber 16 is connected to the middle and bottom of the aeration chamber 11. A water inlet pipe 17 for connecting to the regulating tank is provided on one side of the top of the anaerobic chamber 16. The aeration chamber 11 is filled with filamentous rope-shaped biological filler 14; the bottom of the aeration chamber 11 is connected to the bottom of the deep purification chamber 12, and the deep purification chamber 12 is filled with spherical heavy-density biological filler 18. The top of the sedimentation chamber 13 is provided with a drain pipe 15.

[0052] A pneumatic pipette 2 is fixedly connected to the middle of the deep purification chamber 12, and the liquid outlet end of the pneumatic pipette 2 is connected to the sedimentation chamber 13;

[0053] an aerator 3, which is connected to the pneumatic pipette 2;

[0054] The pneumatic sludge nitrification liquid reflux component 5 is arranged in the deep purification chamber 12 and is pneumatically connected to the aerator 3 . The liquid outlet of the pneumatic sludge nitrification liquid reflux component 5 is located above the biofilm net column 161 .

[0055] The main aeration pipe 4 is arranged at the bottom of the aeration bin 11 , and the main aeration pipe 4 is connected to the aerator 3 .

[0056] Working principle: During sewage treatment, sewage is injected from the anaerobic chamber 16 into the aeration chamber 11. The aeration chamber 11 is densely covered with filamentous rope-shaped biological fillers 14 for microorganisms to form biofilms. Adequate oxygen supply is provided by the aerator 3 and the main aeration pipe 4. A difference in oxygen concentration is formed from the surface to the inside of the biofilm, so that after the sewage enters the aeration chamber 11, nitrification and denitrification reactions occur simultaneously, reducing the content of nitrate nitrogen and ammonia nitrogen in the sewage. When the sewage in the deep purification chamber 12 rises to a certain height, the aerator 3 is started, and the aeration airflow is blown out from the main aeration pipe 4. Under the blowing action of the aeration airflow, ammonia overflows to remove nitrogen from the sewage, and the biofilm grown on the filamentous rope-shaped biological fillers 14 removes phosphorus from the sewage. The detached biofilm and free sludge form a sludge-water mixture, which enters the deep purification chamber 12 from the bottom hole by gravity pressure. The pneumatic sludge nitrification liquid reflux component 5 is supplied with air pressure power through the aerator 3 to return the sludge-water mixture settled at the bottom to the anaerobic chamber 16. The returned sludge-water mixture flows into the top of the biofilm net column 161 and then flows out from the bottom of the biofilm net column 161, so that the sludge-water mixture is mixed with the biofilm in the biofilm net column 161. When the sewage enters the anaerobic bin 16 through the water inlet pipe 17, it undergoes a denitrification reaction with the mixed sludge-water mixture, converting the nitrate nitrogen in the sewage into ammonia nitrogen. The denitrified sewage then enters the aeration bin 11 through the anaerobic bin 16, and under the blowing action of the aeration airflow, the ammonia in the sewage overflows, achieving the effect of nitrogen removal from the sewage. Under sufficient dissolved oxygen conditions, the biofilm on the densely distributed filamentous rope-shaped biological filler 14 in the aeration bin 11 fully absorbs the phosphorus in the sewage and grows rapidly, achieving the effect of phosphorus removal from the sewage. The full spherical heavy-density biological filler 18 filled in the deep purification bin 12 is used for microbial biofilm formation. As the water level of the sewage rises in the deep purification bin 12, the sewage is further purified in depth by the microbial biofilm formation. The pneumatic pipette 2 is provided with air pressure power by the aerator 3 to transfer the secondary purified sewage to the sedimentation bin 13, so that the secondary purified sewage is accumulated in the sedimentation bin 13 for sludge precipitation, and the clean water produced after precipitation overflows through the drain pipe 15. In this technical solution, while ensuring the sewage treatment effect, only one power equipment is used, and there is no need to lift sewage from the regulating tank. At the same time, it can prevent a large amount of sewage from pouring in, effectively prevent the direct discharge of sewage that does not meet the treatment standards, and can continuously treat sewage, which has the beneficial effects of reducing energy consumption, stable operation, and simple operation and maintenance.

[0057] As in the above solution, the biological membrane column 161 includes:

[0058] A first cylindrical barrel 163, which is fixedly connected to the middle position of the interior of the anaerobic chamber 16;

[0059] The first biofilm-forming net 162 for attaching anaerobic biofilm is fixedly disposed in the first cylindrical barrel 163 .

[0060] Working principle: The pneumatic sludge nitrification liquid reflux component 5 is supplied with air pressure power through the aerator 3 to reflux the preliminary sludge-water mixture. The refluxed sludge-water mixture flows into the top of the first cylindrical barrel 163 and then flows out from the bottom of the first cylindrical barrel 163. The sludge-water mixture is fully mixed with the anaerobic biofilm on the first hanging mesh 162. When the sewage enters the anaerobic chamber 16 through the water inlet pipe 17, it undergoes denitrification reaction with the mixed sludge-water mixture to convert nitrate nitrogen in the sewage into ammonia nitrogen. The anaerobic sewage then enters the aeration chamber 11 through the anaerobic chamber 16, and under the blowing action of the aeration airflow, the ammonia in the sewage overflows, achieving the effect of denitrification of the sewage, thereby reducing the content of nitrate nitrogen and ammonia nitrogen in the sewage. Under the condition of sufficient dissolved oxygen, the biofilm on the densely distributed filamentous rope-shaped biological fillers 14 in the aeration chamber 11 fully absorbs the phosphorus in the sewage and grows rapidly, achieving the effect of dephosphorization of the sewage, ensuring that the treated sewage meets the relevant emission standards, and has the advantages of energy saving, consumption reduction and ensuring the sewage treatment effect.

[0061] As in the above solution, it also includes a pneumatic sludge discharge component 6, which includes:

[0062] a first pressurizing cylinder 61 vertically disposed in the sedimentation bin 13, with the bottom end of the first pressurizing cylinder 61 close to the bottom end of the sedimentation bin 13, and the top of the first pressurizing cylinder 61 connected to the aerator 3 via a first pipe 63, the first pipe 63 being connected to a first airflow switch 64;

[0063] One end of the sludge discharge pipe 62 is set through the first pressurizing cylinder 61, one end of the sludge discharge pipe 62 is close to the bottom end of the sedimentation bin 13, and the other end of the sludge discharge pipe 62 is set through the outside of the barrel body 1.

[0064] Working Principle: When the sludge settled in the sedimentation bin 13 covers the bottom of the first pressurized cylinder 61, the aerator 3 delivers gas to the first pressurized cylinder 61 through the first pipe 63, pressurizing the interior of the first pressurized cylinder 61. This creates a pressure differential between the inside and outside of the first pressurized cylinder 61, causing the settled sludge to be discharged from the sedimentation bin 13 through the sludge discharge pipe 62 under the action of the pressure. The discharge of the sludge achieves the purpose of discharging the phosphorus pollutant. The first airflow switch 64 is provided to control the opening and closing of the pneumatic sludge discharge assembly 6. When sludge discharge is not required, the first airflow switch 64 can be closed to reduce energy consumption. When sludge discharge is required, the first airflow switch 64 can be opened again. This has the advantages of reducing energy consumption and ensuring the purification effect.

[0065] As in the above embodiment, a micro-aeration tube 7 is further included, which is disposed at the bottom of the deep purification chamber 12 and is connected to the aerator 3. Aeration in the micro-aeration tube 3 provides oxygen to the spherical heavy-density biofiller 18, forming a dissolved oxygen concentration gradient from the outside to the inside of the biofilm, while simultaneously promoting nitrification and denitrification reactions. Ammonia in the sewage in the deep purification chamber 12 overflows under the blowing action of the micro-aeration tube 3, further denitrifying the sewage, thereby further deeply purifying the sewage and ensuring the purification effect.

[0066] As in the above solution, the pneumatic pipette 2 includes:

[0067] A housing 21 having a liquid inlet 22 at its bottom end is fixedly connected to the middle portion of the deep purification chamber 12;

[0068] An aeration pipe 23, one end of which is disposed through the housing 21, and the other end of the aeration pipe 23 is connected to the aerator 3;

[0069] A water outlet pipe 24 , one end of which is disposed through the housing 21 , and the other end of which is disposed through the top of the sedimentation bin 13 ;

[0070] A gas-liquid communication pipe 25 , one end of which is connected to one end of the aeration pipe 23 , and the other end of which is connected to one end of the water outlet pipe 24 ;

[0071] A U-shaped tube 26 , one end of which is connected to one end of the water outlet pipe 24 , and the other end of the U-shaped tube 26 is located above the gas-liquid communication tube 25 ;

[0072] A one-way check valve 27 for ensuring the internal pressure of the housing 21 is provided at the liquid inlet 22 of the housing 21 .

[0073] Working principle: When the liquid level outside the shell 21 is higher than that inside, the one-way check valve 27 is pushed open due to the external pressure being greater than the internal pressure, and the liquid enters the shell 21. Before the liquid level exceeds the water inlet port of the U-shaped tube 26, the gas delivered by the aerator 3 is discharged directly from the outlet pipe 24 through the gas-liquid connecting pipe 25, which can replenish a small amount of oxygen in the sedimentation tank 13 to prevent the sedimentation sludge from excessive lack of oxygen and ammonia floating. As the liquid level inside the shell 21 rises, when the liquid level exceeds the water inlet port of the U-shaped tube 26, the liquid enters the U-shaped tube 26 to block the gas-liquid connecting tube 25, and the gas is sealed in the aeration tube 23. The gas pressure is used to push the liquid through the U-shaped tube 26 and rise to the outlet pipe 24. The liquid is then discharged into the sedimentation tank 13 through the outlet pipe 24, thereby achieving the purpose of removing the liquid. The pressure of the gas enclosed in the aeration tube 23 is higher than the pressure formed by the height difference between the outlet of the outlet pipe 24 and the outlet of the U-shaped tube 26. Therefore, the liquid can be removed. The greater the pressure difference and the larger the diameter of the outlet pipe 24, the greater the liquid transfer amount per unit time, and vice versa. When the liquid level outside the transfer housing 21 drops to the height of the water inlet port of the U-shaped tube 26, the liquid level inside the housing 21 also drops to the height of the water inlet port of the U-shaped tube 26. Since no liquid is injected into the U-shaped tube 26 and the U-shaped tube 26 is blocked by liquid, the top air pressure in the housing 21 increases, which is transmitted downward to push the one-way check valve 27 to close, and the pneumatic pipette 2 stops transferring liquid.

[0074] As in the above scheme, a second cylindrical barrel 131 is also fixedly connected to the inner middle position of the sedimentation tank 13, and a second biofilm-hanging net 132 for attaching a biofilm to adsorb free sludge is provided in the second cylindrical barrel 131, and the top of the second cylindrical barrel 131 is connected to the other end of the outlet pipe 24.

[0075] Working principle: The sewage discharged from the outlet pipe 24 flows into the top of the second cylindrical tube 131 and then flows out from the bottom of the second cylindrical tube 131. It passes through the second biofilm net 132 set in the second cylindrical tube 131, and the attached biofilm absorbs the free sludge in the sewage, thereby further purifying the sewage, which has the advantage of improving the purification effect.

[0076] As in the above solution, the pneumatic sludge nitrification liquid reflux component 5 includes:

[0077] a second pressurized cylinder 51 vertically disposed in the deep purification chamber 12 , with the bottom end of the second pressurized cylinder 51 close to the bottom end of the deep purification chamber 12 , and the top of the second pressurized cylinder 51 connected to the aerator 3 via a second pipe 53 ;

[0078] One end of the delivery pipe 52 is set through the second pressurized cylinder 51. One end of the delivery pipe 52 is close to the bottom end of the deep purification chamber 12, and the other end of the delivery pipe 52 is connected to the top end of the first cylindrical cylinder 163.

[0079] Working principle: When the sludge-water mixture settled in the deep purification chamber 12 buries the bottom of the second pressurized cylinder 51, the aerator 3 delivers gas to the second pressurized cylinder 51 through the second pipe 53 to pressurize the interior of the second pressurized cylinder 51. A pressure difference is formed between the inside and outside of the second pressurized cylinder 51, so that the precipitated sludge-water mixture flows back to the anaerobic chamber 16 through the delivery pipe 53 under the action of pressure. This method has the advantages of reducing energy consumption and ensuring purification effect.

[0080] As in the above scheme, the top of the barrel body 1 is provided with a first inspection port 164 through the anaerobic chamber 16, and the first inspection port 164 is connected to the first cover 165; the top of the barrel body 1 is provided with a second inspection port 111 through the aeration chamber 11, and the second inspection port 111 is connected to the second cover 112; the top of the barrel body 1 is provided with a third inspection port 133 through the sedimentation chamber 13, and the third inspection port 133 is connected to the third cover 134.

[0081] Working Principle: The first inspection port 164 facilitates inspection and debugging of the interior of the anaerobic chamber 16, ensuring stable operation of the internal components of the anaerobic chamber 16. The first sealing cover 165 ensures the tightness of the anaerobic chamber 16. The second inspection port 111 facilitates inspection and debugging of the interior of the aeration chamber 11, ensuring stable operation of the internal components of the aeration chamber 11. The second sealing cover 112 ensures the tightness of the aeration chamber 11. The third inspection port 133 facilitates inspection and debugging of the interior of the sedimentation chamber 13, ensuring stable operation of the internal components of the sedimentation chamber 13. The third sealing cover 134 ensures the tightness of the sedimentation chamber 13.

[0082] As in the above solution, a second airflow switch 54 for adjusting and controlling the reflux flow rate is connected to the second pipe 53. The second airflow switch 54 can adjust the reflux flow rate of the pneumatic sludge nitrification liquid reflux assembly 5 according to the concentration of the nitrification liquid, further ensuring the denitrification effect of the wastewater and thus ensuring the purification effect of the wastewater.

[0083] As in the above solution, the control switch of the aerator 3 is configured as a liquid level switch, and the liquid level switch is fixedly connected to the outside of the pneumatic pipette 2 .

[0084] Working Principle: In deep purification chamber 12, when the water level rises and triggers the level switch, aerator 3 begins to purify the sewage. When the water level in deep purification chamber 12 is insufficient to trigger the level switch, aerator 3 stops. This approach ensures the continuity of sewage treatment and enhances applicability.

[0085] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A fixed biofilm micro-power sewage purification tank, characterized in that: include: The barrel body is provided with an anaerobic chamber, an aeration chamber, a deep purification chamber and a sedimentation chamber respectively. The anaerobic chamber is fixedly connected to a biofilm net column, the anaerobic chamber is connected to the middle and bottom of the aeration chamber, and a water inlet pipe for connecting to the regulating tank is provided on one side of the top of the anaerobic chamber. The aeration chamber is filled with filamentous rope-shaped biological filler; the bottom of the aeration chamber is connected to the bottom of the deep purification chamber, and the deep purification chamber is filled with spherical heavy-density biological filler. The top of the sedimentation chamber is provided with a drain pipe; A pneumatic pipette, which is fixedly connected to the middle of the deep purification chamber, and the liquid outlet end of the pneumatic pipette is connected to the precipitation chamber; an aerator, which is in communication with the pneumatic pipette; A pneumatic sludge nitrification liquid reflux component is provided in the deep purification chamber and is pneumatically connected to the aerator, with the liquid outlet of the pneumatic sludge nitrification liquid reflux component being located above the biofilm forming net column; A main aeration pipe is provided at the bottom of the aeration bin and is connected to the aerator; Also included is a pneumatic sludge discharge assembly comprising: a first pressurized cylinder vertically disposed in the sedimentation bin, wherein the bottom end of the first pressurized cylinder abuts against the bottom end of the sedimentation bin, and the top of the first pressurized cylinder is connected to the aerator via a first pipe, wherein the first pipe is connected to a first airflow switch; a sludge discharge pipe, one end of which is disposed through the first pressurizing cylinder, one end of which is close to the bottom end of the sedimentation bin, and the other end of which is disposed through the barrel; The pneumatic pipette comprises: A shell having a liquid inlet at the bottom end, which is fixedly connected to the middle part of the deep purification chamber; an aeration pipe, one end of which is disposed through the housing, and the other end of which is connected to the aerator; A water outlet pipe, one end of which is disposed through the shell, and the other end of which is disposed through the top of the sedimentation bin; a gas-liquid connecting pipe, one end of which is connected to one end of the aeration pipe, and the other end of which is connected to one end of the water outlet pipe; A U-shaped tube, one end of which is connected to one end of the water outlet pipe, and the other end of the U-shaped tube is located above the gas-liquid connecting pipe; A one-way check valve for ensuring the internal pressure of the shell is arranged at the liquid inlet of the shell.

2. A fixed biofilm micro-power sewage purification tank according to claim 1, characterized in that: The biological film-hanging net column comprises: A first cylindrical barrel, which is fixedly connected to the middle position inside the anaerobic chamber; The first biofilm-hanging net for attaching anaerobic biofilm is fixedly arranged in the first cylindrical barrel.

3. A fixed biofilm micro-power sewage purification tank according to claim 1, characterized in that: It also includes a micro aeration pipe, which is arranged at the bottom of the deep purification bin, and the micro aeration pipe is connected to the aerator.

4. A fixed biofilm micro-power sewage purification tank according to claim 1, characterized in that: A second cylindrical barrel is also fixedly connected to the middle position of the interior of the sedimentation bin. A second biofilm-hanging net for attaching a biofilm to absorb free sludge is provided in the second cylindrical barrel, and the top end of the second cylindrical barrel is connected to the other end of the outlet pipe.

5. A fixed biofilm micro-power sewage purification tank according to claim 2, characterized in that: The pneumatic sludge nitrification liquid reflux component includes: a second pressurized cylinder vertically disposed in the deep purification chamber, wherein the bottom end of the second pressurized cylinder abuts against the bottom end of the deep purification chamber, and the top of the second pressurized cylinder is connected to the aerator via a second pipe; A delivery pipe, one end of which is arranged through the second pressurized cylinder, one end of the delivery pipe is close to the bottom end of the deep purification chamber, and the other end of the delivery pipe is connected to the top end of the first cylindrical cylinder.

6. A fixed biofilm micro-power sewage purification tank according to claim 1, characterized in that: The top of the barrel body is provided with a first inspection port through the anaerobic chamber, and the first inspection port is connected to a first cover; the top of the barrel body is provided with a second inspection port through the aeration chamber, and the second inspection port is connected to a second cover; the top of the barrel body is provided with a third inspection port through the sedimentation chamber, and the third inspection port is connected to a third cover.

7. A fixed biofilm micro-power sewage purification tank according to claim 5, characterized in that: The second pipeline is connected to a second air flow switch for adjusting and controlling the reflux flow rate.

8. The fixed biofilm micro-power sewage purification tank according to claim 1, characterized in that: The control switch of the aerator is configured as a liquid level switch, and the liquid level switch is fixedly connected to the outside of the pneumatic pipette.

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