A non-powered high-efficiency sewage treatment system

Abstract

The application relates to the technical field of sewage treatment equipment, in particular to a high-efficiency sewage treatment system based on non-power, which comprises a filtering unit, an anaerobic unit, an anoxic unit, an aerobic unit, a sludge sedimentation tank and a clear water tank; a data acquisition module comprising an image acquisition unit for acquiring the gray value of sewage, a nitrogen concentration detection unit for acquiring the nitrogen concentration of sewage, a dissolved oxygen concentration detection unit for acquiring the dissolved oxygen concentration and a light transmittance detection unit for acquiring the water body light transmittance of the aerobic unit; and a control module for judging whether the filtration of sewage is up to the standard according to the average gray value of sewage, judging whether the anaerobic treatment of sewage is up to the standard according to the nitrogen concentration of water body and judging whether the aerobic treatment of sewage is up to the standard according to the dissolved oxygen concentration, so that the sewage treatment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment equipment, and particularly relates to a high-efficiency sewage treatment system based on non-powered. BACKGROUND

[0002] Non-powered sewage treatment is an environmental protection technology that relies on natural gravity, water flow power and other non-mechanical driving methods to achieve sewage purification. The core of this technology is to use natural physical and biological processes such as sedimentation, filtration, adsorption and microbial degradation to treat sewage without additional energy input. Non-powered sewage treatment systems usually include grating, sedimentation tank, biological filter and other components, which remove suspended solids, organic matter, nitrogen, phosphorus and other pollutants in sewage through the synergistic effect of these structures.

[0003] In the non-powered sewage treatment system, sewage first passes through the grating to remove large particles, then enters the sedimentation tank to separate heavy particles such as mud and sand by gravity, and then the sewage flows into the sedimentation tank. The whole process does not require external power, which not only reduces operating costs, but also reduces secondary pollution to the environment.

[0004] Non-powered sewage treatment technology is particularly suitable for rural areas, small communities and remote areas lacking electricity supply due to its economy, environmental protection and sustainability, and is one of the important ways to achieve ecological treatment of sewage.

[0005] Chinese patent application publication No. CN113620506A discloses a non-powered rapid oxygenation rural domestic sewage treatment device and method, which includes an anaerobic unit and an oxygenation and oxidation unit. The oxygenation and oxidation unit includes a gravity aeration system and an aerobic reaction system. The gravity aeration system includes a tiltable water bucket, a piston assembly, an air suction pipe, a gas guide pipe and an aeration head. The sewage discharged from the anaerobic unit is discharged into the tiltable water bucket from above the tiltable water bucket. The tiltable water bucket, the air suction pipe and the gas guide pipe are connected with the piston assembly respectively. The aeration head is connected with the gas guide pipe and located in the aerobic reaction system. Before the water storage capacity in the tiltable water bucket reaches the preset water capacity, the piston is squeezed to discharge air. When the water storage capacity in the tiltable water bucket reaches the preset water capacity, the stored sewage is discharged by tilting, and the piston returns to the original position.

[0006] It can be seen that the above technical solution does not consider the influence of aeration amount on sewage treatment effect and the difference in sewage quality characteristics on the different requirements of sewage treatment process, thereby causing the problem of low sewage treatment efficiency. SUMMARY

[0007] To this end, the present application provides a non-powered high-efficiency sewage treatment system to overcome the problem of low sewage treatment efficiency caused by the fact that the prior art does not consider the influence of aeration amount on sewage treatment effect and does not consider the different requirements of sewage treatment process caused by the difference in sewage quality characteristics.

[0008] To achieve the above-mentioned object, the present application provides a non-powered high-efficiency sewage treatment system, comprising:

[0009] A filtering unit for filtering sewage, comprising a grid installed inside at a preset inclined angle and a water inlet opening on the side wall;

[0010] An anaerobic unit in communication with the filtering unit through a first water conveying pipe for anaerobic treatment of sewage;

[0011] An anoxic unit arranged below the anaerobic unit, in communication with the filtering unit through a second water conveying pipe arranged on the side wall and with the anaerobic unit through a third water conveying pipe arranged on the top, for anoxic treatment of sewage;

[0012] An aerobic unit in communication with the anaerobic unit through a fourth water conveying pipe and with the anoxic unit through a fifth water conveying pipe, for aerobic treatment of sewage;

[0013] A sludge sedimentation tank in communication with the aerobic unit through a sixth water conveying pipe, the sludge sedimentation tank being provided with an overflow on the side wall;

[0014] A clear water tank in communication with the sludge sedimentation tank through a seventh water conveying pipe for storing clear water, wherein the seventh water conveying pipe is in communication with the overflow;

[0015] A data acquisition module comprising an image acquisition unit arranged at the inlet of the first water conveying pipe to obtain the gray value of sewage, a nitrogen concentration detection unit arranged at the anaerobic unit to obtain the nitrogen concentration of sewage, a dissolved oxygen concentration detection unit arranged at the inlet of the sixth water conveying pipe to obtain the dissolved oxygen concentration, and a light transmittance detection unit arranged at the top of the aerobic unit to obtain the water body light transmittance of the aerobic unit;

[0016] A control module connected with the data acquisition module and a plurality of electromagnetic valves respectively, for triggering a grid blockage early warning or conveying the filtered sewage to the anaerobic unit according to the comparison result of the average gray value of sewage and the preset gray value, for determining whether to transmit the anaerobically treated sewage to the aerobic unit or the anoxic unit according to the nitrogen concentration of the water body, and for determining whether the aerobic treatment of sewage meets the preset standard according to the dissolved oxygen concentration.

[0017] Further, the height of the first water pipe is not higher than the height of the water inlet, the height of the fourth water pipe is not higher than the height of the first water pipe, and the height of the fifth water pipe is not higher than the height of the second water pipe.

[0018] Further, the control module determines whether the filtration of the sewage meets the preset standard according to the average gray value of the sewage.

[0019] If the average gray value is less than the first preset gray value, it is determined that the filtration of the sewage does not meet the preset standard, it is determined that the grid is blocked, and a warning is issued.

[0020] If the average gray value is greater than or equal to the first preset gray value and less than the second preset gray value, it is determined that the filtration of the sewage does not meet the preset standard, and the filtration of the sewage is determined again according to the filtration evaluation value.

[0021] If the average gray value is greater than or equal to the second preset gray value, it is determined that the filtration of the sewage meets the preset standard, and the electromagnetic valve on the second water pipe is opened to deliver the filtered sewage to the anoxic unit.

[0022] The average gray value is the arithmetic mean of the gray values of all pixels in the image of the sewage.

[0023] Further, the control module delivers the filtered sewage to the anaerobic unit according to the comparison result of the filtration evaluation value and the preset filtration evaluation value, or reduces the grid spacing of the next batch.

[0024] The filtration evaluation value is the variance of the gray value of the sewage.

[0025] Further, the reduction amplitude of the grid spacing is positively correlated with the filtration difference value, wherein the filtration difference value is the difference between the filtration evaluation value and the preset filtration evaluation value.

[0026] Further, the control module delivers the anaerobically treated sewage to the aerobic unit according to the comparison result of the water body nitrogen concentration and the preset water body nitrogen concentration, or delivers the anaerobically treated sewage to the anoxic unit.

[0027] The water body nitrogen concentration is obtained by the nitrogen concentration detection unit.

[0028] Further, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is less than the first preset dissolved oxygen concentration, and reduces the valve opening of the electromagnetic valve on the fourth water pipe according to the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration.

[0029] And, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is greater than or equal to the first preset dissolved oxygen concentration and less than the second preset dissolved oxygen concentration, and determines an adjustment strategy according to the water purification evaluation value.

[0030] The dissolved oxygen concentration is obtained by a dissolved oxygen concentration detection unit.

[0031] Further, the control module determines that the aerobic treatment of the sewage meets the preset standard in response to the dissolved oxygen concentration being greater than or equal to the second preset dissolved oxygen concentration, and opens the electromagnetic valve on the sixth water pipe to deliver the sewage after aerobic treatment to the sludge sedimentation tank.

[0032] Further, the control module is provided with a plurality of opening reduction modes for reducing the valve opening of the electromagnetic valve on the fourth water pipe, and each opening reduction mode has a different reduction amplitude of the valve opening.

[0033] Further, the control module determines an adjustment strategy according to the water purification evaluation value, wherein,

[0034] If the water purification evaluation value is less than the first preset water purification threshold, the filler content of the aerobic unit is reduced according to the difference between the water purification evaluation value and the first preset water purification threshold;

[0035] If the water purification evaluation value is greater than or equal to the first preset water purification threshold and less than the second preset water purification threshold, the temperature of the aerobic treatment is increased according to the difference between the water purification evaluation value and the second preset water purification threshold;

[0036] If the water purification evaluation value is greater than or equal to the second preset water purification threshold, the length of the aerobic treatment is increased according to the difference between the water purification evaluation value and the second preset water purification threshold;

[0037] The water purification evaluation value is the ratio between the water transmittance and the preset transmittance.

[0038] Compared with the prior art, the present application has the beneficial effects that the grid with a preset inclination angle effectively removes large particles in the sewage, reduces the burden of subsequent processing units, and sets an anaerobic unit, an anoxic unit and an aerobic unit to effectively remove organic matter and nitrogen in the sewage, sets a sludge sedimentation tank to separate sludge and clean water, and delivers the clean water to the clean water tank through the overflow port; in the sewage treatment process, the grid state is determined by the grayscale value and the variance, the grid bar spacing is actively adjusted to avoid the decline in processing capacity caused by the blockage of large particles; the anaerobic treatment effect of the sewage is inspected by the nitrogen concentration of the water body; the aerobic treatment process of the sewage is monitored in real time by the dissolved oxygen concentration and the water purification evaluation value, and the valve opening, the filler content, the treatment temperature and the treatment length are dynamically adjusted, thereby improving the sewage treatment efficiency.

[0039] Further, the application acquires the gray value of sewage through an industrial camera, evaluates the filtration effect of sewage in real time, and controls the module to determine whether the filtration meets the preset standard according to the gray value, and dynamically adjusts the grid spacing and the valve opening, thereby improving the sewage filtration efficiency.

[0040] Further, the application automatically switches the sewage flow direction according to the filtration evaluation value and the nitrogen concentration of the water body, intelligently switches the anaerobic, anoxic and aerobic units, so that the sewage can enter the corresponding processing unit according to different processing needs, and is accurately distributed, thereby improving the sewage treatment efficiency.

[0041] Further, the application reduces the valve opening of the electromagnetic valve on the fourth water pipe according to the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration, thereby reducing the amount of sewage entering the aerobic unit, thereby improving the dissolved oxygen concentration in unit volume of sewage.

[0042] Further, the application sets a plurality of opening reduction modes for the valve opening reduction through the control module, and each opening reduction mode has a different reduction amplitude of the valve opening, thereby realizing accurate control of the valve opening.

[0043] Further, the application determines the adjustment strategy according to the water purification evaluation value through the control module, including reducing the filler content of the aerobic unit, increasing the temperature of aerobic treatment or increasing the aerobic treatment time, optimizing the sewage treatment parameters, thereby improving the resource utilization rate.

[0044] Further, the application increases the aerobic treatment time according to the difference between the water purification evaluation value and the second preset water purification threshold, thereby realizing accurate control of the increase amplitude of the aerobic treatment time.

[0045] Further, the application sets the height of the first water pipe to be not higher than the height of the water inlet, the height of the fourth water pipe to be not higher than the height of the first water pipe, and the height of the fifth water pipe to be not higher than the height of the second water pipe, realizes gravity flow design, and combines the accurate opening and closing control of the electromagnetic valve, thereby ensuring that the system can still maintain stable operation under the condition of no external power. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 The structure schematic view of the embodiment of the application is based on the non-powered high-efficiency sewage treatment system.

[0047] Figure 2 The module connection schematic view of the embodiment of the application is based on the non-powered high-efficiency sewage treatment system.

[0048] Figure 3A flow chart for determining whether the filtration of sewage conforms to preset standards in the embodiment of the present application;

[0049] Figure 4 A flow chart for determining the delivery strategy of sewage after anaerobic treatment in the embodiment of the present application;

[0050] In the figure, 1, a filtration unit; 11, a grid; 2, an anaerobic unit; 21, a first water delivery pipe; 3, an anoxic unit; 31, a second water delivery pipe; 32, a third water delivery pipe; 4, an aerobic unit; 41, a fourth water delivery pipe; 42, a fifth water delivery pipe; 43, an air inlet pipeline; 5, a sludge sedimentation tank; 51, a sixth water delivery pipe; 6, a clear water tank; 61, a seventh water delivery pipe; 7, an electromagnetic valve. DETAILED DESCRIPTION

[0051] In order to make the objects and advantages of the present application clearer, the present application will be further described below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the protection scope of the present application.

[0052] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and not to limit the protection scope of the present application.

[0053] It should be pointed out that the data in the present embodiment are obtained by comprehensive analysis and evaluation of historical detection data and corresponding historical detection results of the present application in the past three months before the present detection. Those skilled in the art can understand that the determination method of the present application for a single parameter can be to select the value with the highest proportion as the preset standard parameter according to the data distribution, to use weighted summation to obtain the value as the preset standard parameter, to substitute each historical data into a specific formula and to obtain the value by using the formula as the preset standard parameter, or other selection methods, as long as the present application can clearly define different specific situations in the single determination process by using the obtained value.

[0054] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , which are respectively a structural schematic diagram of a high-efficiency sewage treatment system based on non-powered force in the embodiment of the present application, a module connection schematic diagram of the high-efficiency sewage treatment system based on non-powered force in the embodiment of the present application, a flow chart for determining whether the filtration of sewage conforms to preset standards in the embodiment of the present application, and a flow chart for determining the delivery strategy of sewage after anaerobic treatment in the embodiment of the present application.

[0055] The embodiment of the present application provides a high-efficiency sewage treatment system based on non-powered force, which comprises:

[0056] Please refer toFigure 1 , the filtering unit 1 for filtering sewage, comprising a grid 11 installed internally at a preset inclined angle of 60° and a water inlet opening on the side wall;

[0057] The anaerobic unit 2 is communicated with the filtering unit 1 through the first water conveying pipe 21, and is used for anaerobic treatment of sewage.

[0058] The anoxic unit 3 is arranged below the anaerobic unit 2, is communicated with the filtering unit 1 through the second water conveying pipe 31 arranged on the side wall, and is communicated with the anaerobic unit 2 through the third water conveying pipe 32 arranged on the top, and is used for anoxic treatment of sewage.

[0059] The aerobic unit 4 is communicated with the anaerobic unit 2 through the fourth water conveying pipe 41 and is communicated with the anoxic unit 3 through the fifth water conveying pipe 42, and the aerobic unit 4 is provided with an air inlet pipe 43 on the top, which is used for aerobic treatment of sewage.

[0060] The sludge sedimentation tank 5 is communicated with the aerobic unit 4 through the sixth water conveying pipe 51, and the sludge sedimentation tank 5 is provided with an overflow on the side wall.

[0061] The clear water tank 6 is communicated with the sludge sedimentation tank 5 through the seventh water conveying pipe 61, and is used for storing clear water, wherein the seventh water conveying pipe 61 is communicated with the overflow, and the seventh water conveying pipe 61 is connected with the overflow; wherein the first water conveying pipe 21, the second water conveying pipe 31, the third water conveying pipe 32, the sixth water conveying pipe 51 and the fourth water conveying pipe 41 are all provided with electromagnetic valves 7.

[0062] The data acquisition module comprises an image acquisition unit arranged at the inlet of the first water conveying pipe 21 and used for acquiring the gray value of sewage, a nitrogen concentration detection unit arranged at the anaerobic unit 2 and used for acquiring the nitrogen concentration of sewage, a dissolved oxygen concentration detection unit arranged at the inlet of the sixth water conveying pipe 51 and used for acquiring the dissolved oxygen concentration, and a light transmittance detection unit arranged at the top of the aerobic unit 4 and used for acquiring the water body light transmittance of the aerobic unit 4.

[0063] The control module is connected with the data acquisition module and the electromagnetic valves respectively, is used for triggering the grid blockage early warning or conveying the filtered sewage to the anaerobic unit according to the comparison result of the average gray value of sewage and the preset gray value, is used for determining whether the anaerobic treated sewage is transmitted to the aerobic unit or the anoxic unit according to the nitrogen concentration of the water body, and is used for determining whether the aerobic treatment of sewage meets the preset standard according to the dissolved oxygen concentration.

[0064] Specifically, the specific structure of the control module is not limited, and the control module itself and each unit therein can be composed of a logic component, which includes a field programmable component, a computer or a microprocessor in the computer.

[0065] Specifically, the height of the first water pipe 21 is not higher than the height of the water inlet, the height of the fourth water pipe 41 is not higher than the height of the first water pipe 21, and the height of the fifth water pipe 42 is not higher than the height of the second water pipe 31, wherein the first water pipe, the second water pipe, the third water pipe, the fourth water pipe and the sixth water pipe are respectively provided with electromagnetic valves.

[0066] Please refer to Figure 3 Specifically, the control module determines whether the filtration of the sewage meets the preset standard according to the average gray value of the sewage, wherein,

[0067] If the average gray value is less than the first preset gray value 80, it is determined that the filtration of the sewage does not meet the preset standard, it is determined that the grid 11 is blocked, and a warning is issued;

[0068] If the average gray value is greater than or equal to the first preset gray value and less than the second preset gray value 120, it is determined that the filtration of the sewage does not meet the preset standard, and the filtration of the sewage is determined again according to the filtration evaluation value of the sewage whether it meets the preset standard;

[0069] If the average gray value is greater than or equal to the second preset gray value, it is determined that the filtration of the sewage meets the preset standard, and the electromagnetic valve 7 on the second water pipe 31 is opened to deliver the filtered sewage to the anoxic unit 3;

[0070] The gray value is obtained by an image acquisition unit, which can be an industrial camera, and is not limited in particular, as long as it meets the gray value acquisition requirement.

[0071] After obtaining the image of the sewage by the image acquisition unit, the arithmetic mean of the gray values of all pixels in the image is calculated, which is denoted as the average gray value.

[0072] In this embodiment, the first preset gray value is in the range of (65, 95), and the second preset gray value is in the range of (105, 135). The lower the gray value of the sewage, the more impurities in the sewage, and the darker the color. Preferably, the first preset gray value is 80, and the second preset gray value is 120. However, the above values are not limited thereto, and those skilled in the art can adjust the values according to actual needs.

[0073] Specifically, the control module determines whether the filtration of the sewage meets the preset standard according to the filtration evaluation value, wherein,

[0074] If the filtration evaluation value is less than the preset filtration evaluation value 15, it is determined that the filtration of the sewage meets the preset standard, and the electromagnetic valve 7 on the first water pipe 21 is opened to deliver the filtered sewage to the anaerobic unit 2;

[0075] If the filtration evaluation value is greater than or equal to the preset filtration evaluation value, it is determined that the filtration of the sewage does not meet the preset standard, and the next batch of grid spacing is reduced according to the difference between the filtration evaluation value and the preset filtration evaluation value.

[0076] The filtration evaluation value is a variance of a gray value of the sewage.

[0077] In this embodiment, the preset filtration evaluation value is valued in the range of (10, 20), and the filtration evaluation value is used to represent the sewage filtration effect; the smaller the variance, the more uniform the distribution of the gray value of the sewage image and the impurities; the larger the variance, the more uneven the distribution of the gray value of the sewage image, and there may be more impurities or pollutants.

[0078] In this embodiment, the preset filtration evaluation value is valued at 15, but the above-mentioned value is not limited thereto, and a person skilled in the art can also adjust the value according to actual needs.

[0079] Specifically, the reduction amplitude of the grid spacing is positively correlated with the filtration difference, wherein the positive correlation is, for example, linear positive correlation or nonlinear positive correlation, and the linear slope of the linear positive correlation is not specifically limited. It can be understood that the larger the filtration difference, the greater the reduction amplitude of the grid spacing; the filtration difference is the difference between the filtration evaluation value and the preset filtration evaluation value.

[0080] Please refer to Figure 4 Specifically, the control module determines the delivery strategy of the sewage after anaerobic treatment according to the nitrogen concentration of the water body, wherein,

[0081] If the nitrogen concentration of the water body is less than the preset nitrogen concentration of the water body 8.6 mg / L, the control module controls the electromagnetic valve 7 on the fourth water delivery pipe 41 to be opened, and the sewage after anaerobic treatment is delivered to the aerobic unit 4;

[0082] If the nitrogen concentration of the water body is greater than or equal to the preset nitrogen concentration of the water body, the control module controls the electromagnetic valve 7 on the third water delivery pipe 32 to be opened, and the sewage after anaerobic treatment is delivered to the anoxic unit 3.

[0083] The nitrogen concentration of the water body is obtained by a nitrogen concentration detection unit, which can be an ammonia nitrogen detector, and is not specifically limited as long as it meets the nitrogen concentration detection requirement.

[0084] In this embodiment, the preset nitrogen concentration of the water body is valued at 8.6 mg / L, but the above-mentioned value is not limited thereto, and a person skilled in the art can also adjust the value according to actual needs.

[0085] Specifically, the main purpose of the anaerobic treatment is to degrade organic matter; if the ammonia nitrogen concentration after the anaerobic treatment is lower than the preset value, the nitrogen concentration of the sewage is low, indicating that the sewage can be directly treated in the aerobic unit 4; if the concentration is higher than or equal to the preset value, the nitrogen concentration of the sewage is high, and the sewage needs to be denitrified through the anoxic unit 3 and then treated aerobically, thereby improving the sewage treatment efficiency.

[0086] Specifically, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is less than the first preset dissolved oxygen concentration 2 mg / L, and reduces the valve opening degree of the electromagnetic valve 7 on the fourth water pipe according to the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration;

[0087] In addition, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is greater than or equal to the first preset dissolved oxygen concentration and less than the second preset dissolved oxygen concentration 5 mg / L, and determines the adjustment strategy according to the water purification evaluation value;

[0088] The dissolved oxygen concentration is obtained by a dissolved oxygen concentration detection unit, which is a dissolved oxygen meter.

[0089] In this embodiment, the control module determines that the aerobic treatment of the sewage does not meet the preset standard according to the comparison result that the dissolved oxygen concentration is less than the first preset dissolved oxygen concentration 2 mg / L, indicating that the amount of sewage entering per unit time exceeds the oxygen supply capacity of the aeration system, the valve opening degree is reduced, the water inflow is limited, and the oxygen supply amount of the air inlet pipeline 43 can be matched with the pollutant load.

[0090] Specifically, the control module determines that the aerobic treatment of the sewage meets the preset standard in response to the dissolved oxygen concentration being greater than or equal to the second preset dissolved oxygen concentration, and opens the electromagnetic valve 7 on the sixth water pipe 51 to deliver the sewage to the sludge sedimentation tank 5;

[0091] In this embodiment, the first preset dissolved oxygen concentration is 2 mg / L, and the second preset dissolved oxygen concentration is 4 mg / L.

[0092] Specifically, the control module is provided with a plurality of opening degree reduction modes for reducing the valve opening degree, wherein,

[0093] If the dissolved oxygen concentration difference is less than the first preset concentration difference 1.5 mg / L, the valve opening degree is reduced to a corresponding value using a first adjustment coefficient 0.98;

[0094] If the dissolved oxygen concentration difference is greater than or equal to the first preset concentration difference and less than the second preset concentration difference 2.6 mg / L, the valve opening degree is reduced to a corresponding value using a second adjustment coefficient 0.96;

[0095] If the dissolved oxygen concentration difference is greater than or equal to the second preset concentration difference, the valve opening is reduced to a corresponding value using a third adjustment coefficient 0.94.

[0096] The dissolved oxygen concentration difference is a difference between a first preset dissolved oxygen concentration and a dissolved oxygen concentration.

[0097] Specifically, the control module determines an adjustment strategy according to a water purification evaluation value, wherein,

[0098] If the water purification evaluation value is less than a first preset water purification threshold 0.55, the filler content of the aerobic unit 4 is reduced according to a difference between the water purification evaluation value and the first preset water purification threshold;

[0099] If the water purification evaluation value is greater than or equal to the first preset water purification threshold and less than a second preset water purification threshold 0.95, the temperature of the aerobic treatment is increased according to a difference between the water purification evaluation value and the second preset water purification threshold;

[0100] If the water purification evaluation value is greater than or equal to the second preset water purification threshold, the aerobic treatment duration is increased according to a difference between the water purification evaluation value and the second preset water purification threshold.

[0101] The water purification evaluation value is a ratio between a water transmittance and a preset transmittance 85%.

[0102] The water transmittance is obtained by a transmittance detection unit, which is an optical transmittance meter.

[0103] Thus, the technical solutions of the present application have been described in connection with the preferred embodiments illustrated in the drawings, but it is readily understood by those skilled in the art that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after such changes or replacements will all fall within the protection scope of the present application.

[0104] The above description is only the preferred embodiments of the present application and is not intended to limit the present application; for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency wastewater treatment system based on non-powered operation, characterized in that, include: A filtration unit for filtering wastewater includes an internally installed screen at a preset angle and an inlet on the side wall. An anaerobic unit, which is connected to the filtration unit via a first water supply pipe, is used to anaerobically treat wastewater. An anoxic unit is located below the anaerobic unit. It is connected to the filtration unit through a second water supply pipe located on the side wall and to the anaerobic unit through a third water supply pipe located at the top, and is used to treat wastewater with anoxic conditions. The aerobic unit is connected to the anaerobic unit via the fourth water supply pipe and to the anoxic unit via the fifth water supply pipe. It is used to perform aerobic treatment on wastewater. The sludge sedimentation tank is connected to the aerobic unit via the sixth water supply pipe, and an overflow outlet is provided on the side wall of the sludge sedimentation tank. The clear water tank is connected to the sludge sedimentation tank via a seventh water supply pipe and is used to store clear water. The seventh water supply pipe is connected to the overflow outlet. The data acquisition module includes an image acquisition unit installed at the inlet of the first water supply pipe to acquire the gray value of the sewage, a nitrogen concentration detection unit installed in the anaerobic unit to acquire the nitrogen concentration of the sewage, a dissolved oxygen concentration detection unit installed at the inlet of the sixth water supply pipe to acquire the dissolved oxygen concentration, and a transmittance detection unit installed at the top of the aerobic unit to acquire the light transmittance of the water in the aerobic unit. The control module is connected to the data acquisition module and several solenoid valves respectively. It is used to trigger a bar screen blockage warning or transport the filtered wastewater to the anaerobic unit based on the comparison result between the average gray value of the wastewater and the preset gray value. It is also used to determine whether the anaerobic wastewater is transferred to the aerobic unit or the anoxic unit based on the nitrogen concentration of the water body. Furthermore, it is used to determine whether the aerobic treatment of the wastewater meets the preset standard based on the dissolved oxygen concentration. The control module determines whether the wastewater filtration meets preset standards based on the average gray value of the wastewater. If the average gray value is less than the first preset gray value, it is determined that the filtration of sewage does not meet the preset standard, the grid is confirmed to be blocked and an early warning is issued. If the average gray value is greater than or equal to the first preset gray value and less than the second preset gray value, it is determined that the filtration of wastewater does not meet the preset standard, and the filtration of wastewater is further determined based on the filtration evaluation value of wastewater. If the average gray value is greater than or equal to the second preset gray value, it is determined that the filtration of the sewage meets the preset standard, and the solenoid valve on the second water supply pipe is opened to transport the filtered sewage to the anoxic unit. The average gray value is the arithmetic mean of the gray values ​​of all pixels in the image of the sewage. The control module delivers the filtered wastewater to the anaerobic unit based on the comparison between the filtration evaluation value and the preset filtration evaluation value, or reduces the bar spacing of the next batch. The filtration evaluation value is the variance of the wastewater ash value.

2. The high-efficiency wastewater treatment system based on non-powered operation according to claim 1, characterized in that, The height of the first water supply pipe is not higher than the height of the water inlet, the height of the fourth water supply pipe is not higher than the height of the first water supply pipe, and the height of the fifth water supply pipe is not higher than the height of the second water supply pipe. Solenoid valves are respectively installed on the first water supply pipe, the second water supply pipe, the third water supply pipe, the fourth water supply pipe, and the sixth water supply pipe.

3. The high-efficiency wastewater treatment system based on non-powered operation according to claim 2, characterized in that, The reduction in the grid spacing is positively correlated with the filtering difference, where the filtering difference is the difference between the filtering evaluation value and the preset filtering evaluation value.

4. The high-efficiency wastewater treatment system based on non-powered operation according to claim 3, characterized in that, The control module delivers the anaerobic wastewater to the aerobic unit or the anoxic unit based on the comparison between the nitrogen concentration in the water body and the preset nitrogen concentration in the water body. The nitrogen concentration in the water body is obtained through a nitrogen concentration detection unit.

5. The high-efficiency wastewater treatment system based on non-powered operation according to claim 4, characterized in that, The control module determines that the aerobic treatment of the wastewater does not meet the preset standard based on the comparison result of the dissolved oxygen concentration being less than the first preset dissolved oxygen concentration, and reduces the valve opening of the solenoid valve on the fourth water pipe based on the difference between the first preset dissolved oxygen concentration and the dissolved oxygen concentration. In addition, the control module determines that the aerobic treatment of wastewater does not meet the preset standards based on the comparison results of dissolved oxygen concentration being greater than or equal to the first preset dissolved oxygen concentration and less than the second preset dissolved oxygen concentration, and determines the adjustment strategy based on the water purification evaluation value. The dissolved oxygen concentration is obtained through a dissolved oxygen concentration detection unit.

6. The high-efficiency wastewater treatment system based on non-powered operation according to claim 5, characterized in that, The control module responds when the dissolved oxygen concentration is greater than or equal to the second preset dissolved oxygen concentration, determines that the aerobic treatment of the wastewater meets the preset standard, and opens the solenoid valve on the sixth water supply pipe to transport the aerobically treated wastewater to the sludge sedimentation tank.

7. The high-efficiency wastewater treatment system based on non-powered operation according to claim 6, characterized in that, The control module is equipped with several methods for reducing the valve opening of the solenoid valve on the fourth water pipe, and each method reduces the valve opening by a different amount.

8. The high-efficiency wastewater treatment system based on non-powered operation according to claim 7, characterized in that, The control module determines the adjustment strategy based on the water purification evaluation value, wherein... If the water purification evaluation value is less than the first preset water purification threshold, the filler content of the aerobic unit is reduced according to the difference between the water purification evaluation value and the first preset water purification threshold. If the water purification evaluation value is greater than or equal to the first preset water purification threshold and less than the second preset water purification threshold, then the temperature of the aerobic treatment is increased according to the difference between the water purification evaluation value and the second preset water purification threshold. If the water purification evaluation value is greater than or equal to the second preset water purification threshold, the aerobic treatment time is increased according to the difference between the water purification evaluation value and the second preset water purification threshold. The water purification evaluation value is the ratio between the water transmittance and the preset transmittance.

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