Decentralized integrated sewage treatment biological reaction device and treatment method thereof

Abstract

A decentralized integrated sewage treatment biological reaction device comprises: a sewage collection tank, and an integrated sewage treatment device matched with the sewage collection tank, wherein the integrated sewage treatment device is composed of modularly arranged functional units: a pretreatment equipment unit, an inclined tube sedimentation treatment unit, an aerobic treatment unit, an anaerobic treatment unit, an ozone treatment unit and a high light irradiation unit; the sewage in the sewage collection tank is subjected to coagulation and stirring treatment in a coagulation and stirring tank provided in the pretreatment equipment unit and added with a liquid flocculant, and then is sequentially sent to the inclined tube sedimentation treatment unit, the aerobic treatment unit, the anaerobic treatment unit and the ozone treatment unit, and after successively realizing sedimentation, oxidation, anaerobic and ozone treatment, the sewage is subjected to light treatment in a high light irradiation unit provided in the ozone treatment unit, and then the decentralized point source sewage is discharged without pollution.

Description

Technical Field

[0001] The present invention relates to a sewage treatment technology, in particular to a decentralized sewage integrated treatment biological reaction device Background Art

[0002] At present, the main way to treat rural domestic sewage is to intercept and pipe it to a sewage treatment plant for treatment. The interception and pipe project requires large investment, long construction period, slow results, and due to the high cost, it is difficult to cover most sparsely distributed pollution points, causing free point source pollution to damage the ecological environment. Although some places have adopted some devices suitable for rural domestic sewage treatment in recent years, they are generally large in size and not very complete in function, so they have not been widely promoted and used in rural areas. Summary of the invention

[0003] The purpose of the present invention is to provide a decentralized sewage integrated treatment biological reaction device with a relatively simple structure and relatively complete functions.

[0004] The above invention object is achieved through the following technical solutions:

[0005] This decentralized integrated sewage treatment biological reaction device includes: a sewage collection tank 43, and an integrated sewage treatment device matched with the sewage collection tank, characterized in that: the integrated sewage treatment device is composed of modular functional units: a pretreatment equipment unit A, an inclined tube sedimentation treatment unit B, an aerobic treatment unit C, an anaerobic treatment unit D, an ozone treatment unit E and a high light irradiation unit 51;

[0006] The pretreatment equipment unit A comprises: a coagulation stirring tank 29, a liquid premixing tank 27, a main control box 22, a flow meter 17, a dosing metering pump 33, an ozone generator 26, an aeration pump 32, a frequency converter 52 and a delivery pipe arranged in the main box 7; the coagulation stirring tank 29 is a funnel-shaped cavity, which is connected to the sewage collection tank 43 through a sewage delivery pipe 46 equipped with a flow meter 17 arranged on the upper part of the coagulation stirring tank 29 to form a sewage inlet channel, and its lower part is connected through a sewage delivery pipe 46 equipped with a flow meter 17 arranged on the upper part of the coagulation stirring tank 29 to form a sewage inlet channel. The coagulation tank output pipe 21 equipped with a drain valve 31 and a coagulation tank output electric control valve 19 is connected to the inclined tube sedimentation treatment tank 8 in the inclined tube sedimentation treatment unit B; the liquid premixing tank 27 is also a funnel-shaped cavity, the upper part of which is introduced from the upper part of the coagulation stirring tank 29 into the inner cavity of the coagulation stirring tank through a liquid delivery pipe 47 equipped with a dosing metering pump 33, and the lower part is connected to the sewage outlet 2 through a delivery pipe equipped with a manual drain valve 18, thereby constituting a sewage pretreatment system in the pretreatment equipment unit A.

[0007] The inclined tube sedimentation treatment unit B comprises: an inclined tube sedimentation treatment tank 8, and an inclined tube upper support plate 24 and an inclined tube lower support plate 23 arranged in the inner cavity of the tank body, a toothed overflow plate 25 is arranged on the upper part of the inclined tube upper support plate 24, two sedimentation tank outlets 34 are arranged on the tank wall of the inclined tube sedimentation treatment tank 8, and a coagulation sewage input pipe 60 connected to the coagulation tank output pipe 21 at the lower part of the coagulation stirring tank is arranged on the inclined tube lower support plate 23, and the bottom of the inclined tube sedimentation treatment tank 8 is funnel-shaped, and the bottom of the funnel is connected to the sewage main pipe 53 through a sedimentation waste liquid discharge control valve 20;

[0008] The aerobic treatment unit C comprises an aerobic treatment tank 9 and a strip-shaped ecological base support 37 arranged in the tank body, and two aerobic tank water inlets 34A connected to the sedimentation tank outlet 34 of the inclined tube sedimentation treatment tank 8 are arranged on the upper part of the tank wall next to one side of the inclined tube sedimentation treatment tank 8, and two corresponding water inlet pipes 58 are arranged inside the aerobic tank water inlet; at the same time, an aerobic tank overflow outlet 36 for connecting with the anaerobic treatment tank 10 of the next treatment process is arranged on the inner wall of the other side of the tank body at a height corresponding to the strip-shaped ecological base support 37; an aerobic tank sewage outlet 35 is arranged at the lower part of the tank body of the anaerobic treatment tank 10, and the aerobic tank sewage outlet 35 is connected to the external sewage main pipe 53; in addition, a multi-layer horizontal isolation plate 59 is arranged on the strip-shaped ecological base support 37;

[0009] The anaerobic treatment unit D comprises an anaerobic treatment tank 10, a plurality of vertical isolation plates 57 distributed in a non-partitioned manner are arranged in the inner cavity of the tank body, an anaerobic filler mounting bracket 40 is arranged in the isolation cavity close to one side of the tank wall, and a one-way exhaust valve 13 is arranged on the upper part of one side of the tank wall, and an anaerobic tank overflow outlet 38 for communicating with the inner cavity of the ozone treatment tank 11 of the next treatment process is arranged on the upper part of the other side of the tank wall; in addition, an anaerobic tank inlet 36A communicating with the aerobic tank overflow outlet 36 is arranged on the upper part of one side of the tank body where the anaerobic filler mounting bracket 40 is arranged, and an anaerobic tank sewage pipe 39 is arranged at the lower part of the tank body of the anaerobic treatment tank, and the anaerobic tank sewage pipe 39 is connected to the external sewage main pipe 53 through the anaerobic tank sewage valve 4;

[0010] The ozone treatment unit E comprises an ozone treatment pool 11, a plurality of vertical isolation plates 57 arranged in a non-partitioned manner in the inner cavity of the pool body, an ozone explosion plate 56 arranged at the bottom of the pool, and a high light irradiation unit 51 is arranged in the isolation cavity close to one side of the pool wall; in addition, an ozone pool water inlet 38A is arranged on one side of the inner wall of the ozone treatment pool body, which corresponds to the anaerobic pool overflow outlet 38 arranged on the pool wall of the anaerobic treatment pool, forming a treatment channel from the ozone treatment pool water inlet 38A to bypass a plurality of vertical isolation plates 57, enter the high light irradiation unit 51, and then be discharged from the purified water outlet 6; at the same time, an ozone sewage outlet 5 is arranged at the lower part of the ozone treatment pool, and the ozone sewage outlet 5 is connected to the external sewage main pipe 53.

[0011] Furthermore, the coagulation stirring tank 29 and the liquid premixing tank 27 are respectively provided with a corresponding coagulation tank agitator 30 and liquid premixing agitator 28 .

[0012] Furthermore, each of the sewage collection tank 43, the coagulation and stirring tank 29, the liquid premixing tank 27, the inclined tube sedimentation tank 8, the aerobic treatment tank 9, the anaerobic treatment tank 10, and the ozone treatment tank 11 is provided with a liquid level sensor 12 for controlling the liquid level.

[0013] Furthermore, the bottoms of the inclined tube sedimentation treatment tank 8, the aerobic treatment tank 9, the anaerobic treatment tank 10, and the ozone treatment tank 11 are all inclined at a slope of 1:10 towards the sewage main pipe.

[0014] Furthermore, a grid 44 and a water pump 45 are provided in the sewage collection tank 43 , and the water pump 45 is connected to a sewage conveying pipe 46 .

[0015] The specific method of sewage treatment in this decentralized integrated sewage treatment biological reaction device is as follows:

[0016] 1) First, according to the water quality of the sewage, solid flocculants and water are mixed in a liquid premixing tank 27 at a concentration of 2%-5% to prepare a flocculation liquid for standby use;

[0017] 2) Then start the water inlet pump 45, suck the sewage in the sewage collection tank 43 that has been isolated by the coarse screen 44 through the sewage water pipe 46 and the flowmeter 17 arranged in the water pipe, and let the sewage enter the inner cavity of the coagulation stirring tank 29 from the upper part; at the same time, the liquid premixing mixer 28 arranged inside the liquid premixing tank 27 storing the flocculant in a ratio of 2%-5% is continuously stirred, and then the liquid is pumped into the coagulation stirring tank 29 through the dosing metering pump 33, and the dosing metering pump can adjust the dosing speed in real time according to the water inlet speed to achieve the best liquid dosage ratio; the liquid entering the coagulation stirring tank is sent to the inclined tube sedimentation treatment tank 8 through the coagulation tank output pipe 21 provided with the coagulation tank output electric control valve 19 arranged at the lower part of the coagulation stirring tank 29 with a conical bottom under the action of the coagulation tank mixer 30 arranged inside the tank;

[0018] 3) The mixed sewage to which the coagulant liquid has been added that enters the inclined tube sedimentation treatment tank 8 receives the mixed water body to which the liquid has been added from the coagulation stirring tank 29 through the coagulant sewage input pipe 60 arranged on the inclined tube lower support plate 23 in the inner cavity of the inclined tube sedimentation tank body for natural sedimentation separation; the bottom water body containing floccules after flocculation and sedimentation treatment is collected to the center of the tank bottom through the sediment at the bottom of the cone-shaped inclined tube sedimentation treatment tank 8, and a waste liquid conveying pipe 41 is arranged at the lowest end of the tank bottom. Under the control of the inclined tube sedimentation sewage discharge electric control valve 20 arranged in the waste liquid conveying pipe, the inclined tube sedimentation sewage discharge electric control valve automatically opens after the sediment accumulates to a certain height, and the sediment flows through the pipeline to the external waste liquid storage tank; at the same time, the mixed water body after flocculation treatment in the upper part of the inclined tube sedimentation tank 8 flows from the upper part into the aerobic tank 9 through the inclined tube sedimentation tank outlet 34 for aerobic treatment;

[0019] 4) The mixed sewage that has been treated by sedimentation and enters the aerobic treatment tank 9 enters the aerobic treatment tank 9 from the aerobic tank water inlet 34A arranged at the upper part of the aerobic treatment tank 9 and corresponding to the sedimentation tank outlet 34 through the aerobic tank water inlet pipe from the lower part of the tank body, and is compressed to the bottom of the tank by the microorganisms attached to the ecological base support 37 arranged in the aerobic tank body and the bottom aeration plate 50 arranged in the tank body and connected to the aeration pump 32 arranged in the pretreatment equipment unit A, and is released into the water body through the bottom aeration plate 50, thereby increasing the dissolved oxygen content of the water body, so that the mixed sewage that has been treated in the inclined tube sedimentation tank in the tank has the oxygen content of the water body increased in the aerobic treatment tank; and is sent to the anaerobic treatment tank 10 through the aerobic tank overflow outlet 36 arranged at the upper part of the tank wall on the other side of the aerobic treatment tank body;

[0020] 5) The mixed sewage that has been aerobically treated and enters the anaerobic treatment tank 10 enters the anaerobic tank inlet 36A corresponding to the aerobic treatment tank overflow outlet 36 at the upper part of the anaerobic treatment tank 10 and enters the treated mixed sewage in the anaerobic treatment tank 10. After flowing into the anaerobic treatment tank 10, it first flows through the anaerobic filler mounting bracket 40 provided in the isolation cavity of one side of the tank wall to be anaerobically treated; then, it passes through the vertical isolation plates 57 in the non-partitioned anaerobic tanks provided in the inner cavity of the same tank body, and is discharged from the anaerobic tank overflow outlet 38 provided on the tank wall on the other side of the cavity of the anaerobic treatment tank 10, and is sent to the ozone treatment tank 11 for ozone treatment;

[0021] 6) The anaerobically treated mixed sewage entering the ozone treatment tank 11 enters the treated mixed sewage in the ozone treatment tank 11 through the ozone tank inlet 38A corresponding to the anaerobic tank overflow outlet 38 at the upper part of the ozone treatment tank 11 and the upper part of the anaerobic treatment tank 10. After flowing into the ozone treatment tank 11, the treated mixed sewage entering the ozone treatment tank 11 is fully integrated with the water body in the process of flowing through the multiple vertical isolation plates 57 in the ozone treatment tank and at the same time under the action of the ozone sprayed by the ozone explosion disk 56 arranged at the bottom of the tank. Finally, it enters the high light irradiation unit 51 arranged in the last isolation chamber from a high position, is irradiated by the xenon lamp tube in the high light unit 51, and the treated water becomes a qualified discharge water body after being irradiated by the xenon lamp, and is discharged to the outside through the outlet 6 after self-purification.

[0022] Compared with various existing similar sewage treatment systems, the decentralized integrated sewage treatment biological reaction device proposed in the above technical solution has the following characteristics:

[0023] 1. The equipment integrates and optimizes functional modules such as solid-liquid separation, biochemical reaction, ozone sterilization, and high light irradiation to achieve modular installation, which can solve the problem of point source sewage discharge;

[0024] 2. The equipment can automatically adjust the processing speed according to the sewage pollution load, solving the problem of excessive liquid medicine caused by low-pollution water and incomplete purification caused by high-pollution water.

[0025] 3. The biological attachment base of the aerobic biochemical treatment system of the equipment is fixed separately, and air is taken in from the bottom, which reduces the maintenance frequency and difficulty.

[0026] 4. The biochemical pool and ozone treatment pool are equipped with multi-layer partitions with upper and lower openings to enhance the water-biofilm and water-air exchange effects.

[0027] 5. The stainless steel mirror surface on the inner wall of the water outlet enhances the illumination effect of the xenon light and increases the photochemical degradation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a sewage treatment system involved in the present invention;

[0029] Figure 2 It is a schematic diagram of the overall structure of the sewage treatment device;

[0030] Figure 3 A top view of the overall structure of the sewage treatment device;

[0031] Figure 4 It is a cross-sectional view of the pre-processing equipment unit at the position AA;

[0032] Figure 5 A cross-sectional view of the inclined tube sedimentation tank at the BB direction;

[0033] Figure 6 This is a schematic diagram of the overall structure of the aerobic treatment pool;

[0034] Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of an aerobic treatment tank;

[0035] Figure 8 This is a schematic diagram of the overall structure of the anaerobic treatment tank;

[0036] Fig. 9 It is a schematic diagram of the three-dimensional cross-sectional structure of an anaerobic treatment tank;

[0037] Fig.10 This is a schematic diagram of the overall structure of the ozone treatment pool;

[0038] Fig.11 It is a schematic diagram of the three-dimensional cross-sectional structure of the ozone treatment tank.

[0039] In the figure:

[0040] 1-water inlet; 2-drain outlet; 3-aerobic tank drain valve; 4-anaerobic tank drain valve; 5-ozone tank drain valve; 6-purified water outlet; 7-main box; 8-inclined tube sedimentation treatment tank; 9-aerobic treatment tank; 10-anaerobic treatment tank; 11-ozone treatment tank; 12-liquid level sensor; 13-one-way exhaust valve; 14-equipment room cooling fan; 15-base; 16-inspection port;

[0041] 17-flow meter; 18-manual drain valve; 19-coagulation tank output electric control valve; 20-sedimentation waste liquid discharge control valve; 21-coagulation tank output pipe; 22-main control box; 23-inclined tube lower support plate; 24-inclined tube upper support plate; 25-toothed overflow plate; 26-ozone generator; 27-liquid premixing tank; 28-liquid premixing mixer; 29-coagulation stirring tank; 30-coagulation mixer; 31-drain valve; 32-aeration pump; 33-dosing metering pump; 34-sedimentation tank outlet; 34A-aerobic tank inlet; 35-aerobic tank sewage outlet;

[0042] 36-aerobic pool overflow outlet; 36A-anaerobic pool inlet; 37-strip ecological base support;

[0043] 38- Anaerobic tank overflow outlet; 38A- Ozone tank inlet; 39- Anaerobic tank sewage outlet;

[0044] 40-deoxygenation filler mounting bracket; 41-waste liquid delivery pipe; 42-bottom sewage pipe;

[0045] 43- sewage collection tank; 44- coarse screen; 45- water pump; 46- sewage delivery pipe;

[0046] 47-medicine liquid delivery pipe; 50-aeration plate; 51-high light irradiation unit; 52-frequency converter; 53-sewage main pipe; 54-aerobic delivery pipe; 55-ozone delivery pipe; 56-ozone aeration plate; 57-vertical isolation plate; 58-water inlet pipe; 59-horizontal isolation plate;

[0047] 60-coagulation sewage inlet pipe;

[0048] A-pretreatment equipment unit; B-inclined tube sedimentation treatment unit; C-aerobic treatment unit;

[0049] D- anaerobic treatment unit; E- ozone treatment unit. DETAILED DESCRIPTION

[0050] The present invention is further described below with reference to the accompanying drawings and embodiments of the present invention are given.

[0051] Figure 1 , Figure 2 Provided is a system structure diagram of the present invention; Figure 3 This is a top view of the integrated sewage treatment device.

[0052] like Figure 1 , 2 The decentralized integrated sewage treatment biological reaction device shown comprises: a sewage collection tank 43, and an integrated sewage treatment device matched with the sewage collection tank, wherein the integrated sewage treatment device is composed of modular functional units: a pretreatment equipment unit A, an inclined tube sedimentation treatment unit B, an aerobic treatment unit C, an anaerobic treatment unit D, an ozone treatment unit E and a high light irradiation unit 51;

[0053] Attached Figure 4The pretreatment equipment unit A comprises: a coagulation stirring tank 29, a liquid premixing tank 27, a main control box 22, a flow meter 17, a dosing metering pump 33, an ozone generator 26, an aeration pump 32, a frequency converter 52 and a delivery pipe arranged in the main box 7; the coagulation stirring tank 29 is a funnel-shaped cavity, which is connected to the sewage collection tank 43 through a sewage delivery pipe 46 equipped with a flow meter 17 arranged on the upper part of the coagulation stirring tank 29 to form a sewage inlet channel, and its lower part is connected through a sewage delivery pipe 46 equipped with a flow meter 17 arranged on the upper part of the coagulation stirring tank 29 to form a sewage inlet channel. The coagulation tank output pipe 21 equipped with a drain valve 31 and a coagulation tank output electric control valve 19 is connected to the inclined tube sedimentation treatment tank 8 in the inclined tube sedimentation tank treatment unit B; the liquid premixing tank 27 is also a funnel-shaped cavity, the upper part of which is introduced from the upper part of the coagulation stirring tank 29 into the inner cavity of the coagulation stirring tank through a liquid delivery pipe 47 equipped with a dosing metering pump 33, and the lower part is connected to the sewage outlet 2 through a delivery pipe equipped with a manual drain valve 18, thereby constituting a sewage pretreatment system in the pretreatment equipment unit A.

[0054] In addition, in the pre-processing equipment unit:

[0055] The liquid premixing tank 27 and the coagulation stirring tank 29 are each provided with a corresponding liquid premixing mixer 28 and a coagulation stirring machine 30, which are used to stir and mix the liquid prepared in the liquid premixing tank 27 and the sewage and prepared liquid entering the coagulation stirring tank 29, respectively.

[0056] The sewage collection tank 43, coagulation stirring tank 29, liquid premixing tank 27, inclined tube sedimentation treatment tank 8, aerobic treatment tank 9, anaerobic treatment tank 10, and ozone treatment tank 11 are each provided with a liquid level sensor 12 for controlling the liquid level; the liquid level sensor 12 is used to control the corresponding tank body to be within the effective working liquid level.

[0057] The delivery pipes include: a sewage delivery pipe 46 arranged between the sewage collection tank 43 and the coagulation and stirring tank 29, a liquid medicine delivery pipe 47 arranged between the coagulation and stirring tank 29 and the liquid medicine premixing tank 27, a coagulation tank output pipe 21 arranged between the coagulation and stirring tank 29 and the inclined tube sedimentation treatment tank 8, an aerobic air delivery pipe 54 arranged between the aerator 2 and the explosion disk 50, an ozone air delivery pipe 55 arranged between the aeration pump 32 and the ozone explosion disk 56, and a waste liquid delivery pipe 41 arranged between the bottom of the inclined tube sedimentation treatment tank 8 and the waste liquid discharge control valve 20.

[0058] Attached Figure 5 A schematic structural diagram of the inclined tube sedimentation treatment unit B is given.

[0059] The inclined tube sedimentation treatment unit B includes: an inclined tube sedimentation treatment tank 8, and an inclined tube upper support plate 24 and an inclined tube lower support plate 23 arranged in the inner cavity of the tank body, a toothed overflow plate 25 is provided on the upper part of the inclined tube upper support plate 24, two sedimentation tank outlets 34 are provided on the tank wall of the inclined tube sedimentation treatment tank 8, and the inclined tube lower support plate 23 is provided with a coagulation sewage output and input pipe 60 connected to the coagulation tank output pipe 21 at the bottom of the coagulation stirring tank. The bottom of the inclined tube sedimentation treatment tank 8 is funnel-shaped, and the bottom of the funnel is connected to the sewage main pipe 53 through a sedimentation waste liquid discharge control valve 20.

[0060] Attached Figure 6 , 7 The actual structural diagram of the aerobic treatment unit is given, where Figure 6 It is a schematic diagram of the overall structure of the aerobic treatment tank 9; Figure 7 This is a three-dimensional cross-sectional view of the aerobic treatment tank.

[0061] The aerobic treatment unit C includes an aerobic treatment tank 9, a strip ecological base support 37 arranged in the body of the aerobic treatment tank 9, and an explosion plate 50 arranged at the bottom of the aerobic treatment tank, and two aerobic tank water inlets 34A connected to the sedimentation tank outlet 34 of the inclined tube sedimentation treatment tank 8 are arranged on the upper part of the tank wall next to the inclined tube sedimentation treatment tank 8, and two corresponding water inlet pipes 58 are arranged on the inner side of the aerobic tank water inlet; at the same time, an aerobic tank overflow outlet 36 for connecting with the anaerobic treatment tank 10 of the next treatment process is provided on the inner wall of the other side of the tank body at a corresponding height to the strip ecological base support 37; an aerobic tank sewage outlet 35 is provided at the lower part of the tank body of the anaerobic treatment tank 10, and the aerobic tank sewage outlet 35 is connected to the external sewage main pipe 53; in addition, a multi-layer horizontal isolation plate 59 is provided on the strip ecological support 37.

[0062] Two aerobic tank overflow outlets 36 are arranged on the inner wall of the aerobic treatment tank, one of which is used to communicate with the next process - the anaerobic treatment tank 10, and the other aerobic tank overflow outlet is connected to the drainage pipeline; at the same time, an aerobic tank sewage outlet 35 is arranged at the lower part of the lower inclined pool bottom, and the aerobic tank sewage outlet 35 is connected to the external sewage main pipe 53.

[0063] In actual operation, the ozone generator 26 installed in the pretreatment equipment unit compresses air to the bottom of the aerobic treatment tank, and releases it into the water in the tank through the aeration plate 50 to increase the dissolved oxygen content of the water. The aerobic treatment tank 9 has water inlet at the bottom and outlet at the top. The water is fully contacted with the ecological base in the process of entering the top from the bottom. The water purified by aerobic treatment flows from the overflow outlet 36 of the aerobic tank into the anaerobic treatment tank 10 for anaerobic treatment.

[0064] Attached Figure 8 ,9 The actual structure diagram of the anaerobic treatment unit is given. Figure 8 It is the overall structural diagram of the anaerobic treatment tank; Fig. 9 This is a three-dimensional cross-sectional view of the anaerobic treatment tank.

[0065] The anaerobic treatment unit D comprises an anaerobic treatment tank 10, a plurality of vertical isolation plates 57 which are distributed in a non-isolated manner are arranged in the inner cavity of the anaerobic treatment tank body, and an anaerobic filler mounting bracket 40 is arranged in the isolation cavity close to one side of the tank wall, and a one-way exhaust valve 13 is arranged on the upper part of one side of the tank body; at the same time, an anaerobic tank overflow outlet 38 which is used to communicate with the inner cavity of the ozone treatment tank 11 of the next treatment process is arranged on the upper part of the other side of the tank wall; in addition, an anaerobic tank inlet 36A which is connected with the aerobic overflow outlet 36 in the aerobic treatment tank is arranged on the upper part of one side of the tank body where the anaerobic filler mounting bracket 40 is arranged, and an anaerobic tank sewage pipe 39 is arranged at the lower part of the anaerobic tank body, and the anaerobic tank sewage pipe 39 is connected with the external sewage main pipe 53 through the anaerobic sewage valve 4.

[0066] Attached Fig.10 , 11 The actual structure diagram of the ozone treatment unit E is given, where Fig.10 is the overall structural diagram of the ozone treatment pool; Fig.11 It is a three-dimensional cross-sectional view of the ozone treatment tank.

[0067] The ozone treatment unit E comprises an ozone treatment pool 11, a plurality of vertical isolation plates 57A arranged in a non-partitioned manner in the inner cavity of the pool body, an ozone aeration plate (not shown in the figure) arranged at the bottom of the pool, and a high light irradiation unit 51 is arranged in an isolation cavity close to one side of the pool wall; in addition, an ozone pool water inlet 38A matching the anaerobic pool overflow outlet 38 arranged on the pool wall during anaerobic treatment is provided at the upper part of one side of the inner wall of the pool body, forming a water treatment path for the water body to enter the high light irradiation unit 51 after bypassing a plurality of vertical isolation plates 57 from the ozone pool water inlet 38A, and a treatment channel for the water body after high light treatment to be discharged from the treated water outlet 6 arranged at the lower part of the high light irradiation unit 51; at the same time, an ozone pool sewage outlet 5 is provided at the lower part of the ozone treatment pool 11, and the ozone pool sewage outlet 5 is connected to the external sewage main pipe 53.

[0068] The bottoms of the inclined tube sedimentation tank 8, the aerobic treatment tank 9, the anaerobic treatment tank 10 and the ozone treatment tank 11 all have a slope of 1:10.

[0069] The sewage collection tank 43 is provided with a coarse screen 44 and a water pump 45, and the water pump 45 is connected to the sewage delivery pipe 46. A coarse screen and a set of high and low liquid level sensors are provided in the water inlet pump pool. The coarse screen prevents large-volume waste (such as plastic bags, toilet paper, etc.) from entering the main system. The liquid level sensor 12 in the sewage collection tank 43 controls the actual operation of the water inlet pump 45. When the sewage collection tank rises to the upper liquid level, the water inlet pump starts and allows the sewage to flow into the coagulation mixing tank through the water inlet pipe. The water inlet pipe is provided with a flow meter to monitor the water inlet speed.

[0070] The specific method of sewage treatment of the decentralized integrated sewage treatment biological reaction device proposed by the present invention is as follows:

[0071] 1) First, according to the water quality of the sewage, solid flocculants and water are mixed in a liquid premixing tank 27 at a concentration of 2%-5% to prepare a flocculation liquid for standby use;

[0072] In practical application: the sewage to be treated first passes through the water inlet pump pool 43, with a flow rate of 0.5 to 2 m 3 / h is adjustable, and a coarse screen and a set of high and low liquid level floats are installed in the water inlet pump pool. The coarse screen is used to prevent waste with a particle size greater than 20mm (such as plastic bags, toilet paper, etc.) from entering the main system; the high and low liquid level floats (liquid level sensor 12) are used to control the start and stop of the water inlet pump. When the water level in the pool rises to the upper liquid level, the water inlet pump starts, and the sewage flows into the coagulation sedimentation tank through the water inlet pipe. The water inlet pipe is equipped with a flow meter to monitor the water inlet speed. The water inlet pump is controlled by a frequency converter. After setting the dosing concentration, the control system can automatically control the water inlet speed.

[0073] 2) Then start the water inlet pump 45, suck the sewage in the sewage collection tank 43 that has been isolated by the coarse screen 44 through the sewage water pipe 46 and the flowmeter 17 arranged in the water pipe, and let the sewage enter the inner cavity of the coagulation stirring tank 29 from the upper part; at the same time, the liquid premixing mixer 28 arranged inside the liquid premixing tank 27 storing the flocculant in a ratio of 2%-5% is continuously stirred, and then the liquid is pumped into the coagulation stirring tank 29 through the dosing metering pump 33, and the dosing metering pump can adjust the dosing speed in real time according to the water inlet speed to achieve the best liquid dosage ratio; the liquid entering the coagulation stirring tank is sent to the inclined tube sedimentation treatment tank 8 through the coagulation tank output pipe 21 provided with the coagulation tank output electric control valve 19 arranged at the lower part of the coagulation stirring tank 29 with a conical bottom under the action of the coagulation tank mixer 30 arranged inside the tank;

[0074] The flocculant is stored in the liquid premixing tank with a volume of 24L and can be used for 20 to 24 hours. The liquid is configured according to the optimal test concentration. The tank body is a cone bottom, and a stirrer is installed inside. The stirring speed is 80 rpm. It works for 1 minute and has a 5-minute interval to ensure that the agent is suspended. The liquid is pumped into the coagulation stirring tank by the dosing metering pump 33. The dosing speed of the dosing metering pump is adjustable from 0 to 10L / h and works synchronously with the water inlet pump. The coagulation stirring tank has a cone bottom structure, and a coagulation mixer is installed inside. The stirring speed is 80 rpm, and it works synchronously with the water inlet pump. The liquid and sewage stay in the stirring tank for 120 to 150s. After being fully mixed, they enter the inclined tube sedimentation treatment tank through the pipeline by their own weight.

[0075] 3) The mixed sewage to which the coagulant solution has been added that enters the inclined tube sedimentation treatment tank 8 receives the mixed water body to which the solution has been added from the coagulation stirring tank 29 through the coagulant sewage input pipe 60 arranged on the inclined tube lower support plate 23 in the inner cavity of the inclined tube sedimentation treatment tank body, and undergoes natural sedimentation separation; the bottom water body containing floccules after flocculation and sedimentation treatment is collected to the center of the tank bottom through the sediment at the bottom of the conical inclined tube sedimentation treatment tank 8, and a sewage pipe 41 is provided at the lowest end of the tank bottom. Under the control of the inclined tube sedimentation sewage discharge electric control valve 20 arranged in the sewage pipe, the inclined tube sedimentation sewage discharge electric control valve automatically opens after the sediment accumulates to a certain height, and the sediment flows through the pipeline to the external waste liquid storage tank; at the same time, the mixed water body after flocculation treatment in the upper part of the inclined tube sedimentation treatment tank 8 flows from the upper part into the aerobic treatment tank 9 through the inclined tube sedimentation tank outlet 34 for aerobic treatment.

[0076] In actual application: water enters the inclined tube sedimentation treatment tank 8 from the bottom, and the upper effluent is sent to the aerobic treatment tank 9. The upper 1 / 3 of the tank body is provided with an inclined tube with an inclination angle of 60°. The mixed liquid stays in the inclined tube sedimentation treatment tank for 25 to 140 minutes. After sufficient flocculation and sedimentation, it passes through the inclined tube sedimentation tank and flows to the aerobic treatment tank through the overflow weir. The lower end of the inclined tube sedimentation treatment tank is a pyramid bottom, and the sediment is collected at the center of the tank bottom. A sewage outlet is provided at the lowest end of the tank bottom. The sewage outlet is controlled by a solenoid valve. When the sediment accumulates to a certain height, the sewage outlet is automatically opened, and the sediment flows through the pipeline to the external waste liquid storage tank.

[0077] 4) The mixed sewage that has been precipitated and treated in the aerobic treatment tank 9 enters the aerobic treatment tank 9 from the aerobic tank inlet 34A arranged at the upper part of the aerobic treatment tank 9 and corresponding to the outlet 34 of the inclined tube sedimentation tank through the aerobic tank inlet pipe and from the lower part of the tank body. The air is compressed to the bottom of the tank by the microorganisms attached to the ecological base support 37 arranged in the aerobic treatment tank body and the bottom aeration plate 50 arranged in the tank body and connected to the aeration pump 32 arranged in the pretreatment equipment unit 7, and is released into the water body through the aeration plate 50, thereby increasing the dissolved oxygen content of the water body, so that the mixed sewage that has been treated in the inclined tube sedimentation tank in the tank has the oxygen content of the water body increased in the aerobic tank; and is sent to the anaerobic treatment tank 10 through the aerobic tank overflow outlet 36 arranged on the upper part of the tank wall on the other side of the tank body.

[0078] The strip-shaped ecological base in the aerobic treatment tank 9 provides an attachment area for aerobic microorganisms. The piston-type aerator arranged in the main box 7 is used to compress the air to the explosion plate 50 at the bottom of the aerobic treatment tank to release the oxygen in the air into the water body, thereby increasing the dissolved oxygen content of the entire water body. The aerobic treatment tank 9 has water entering from the bottom and discharging from the top. Since the water in the tank is fully in contact with the ecological base, the water after aerobic purification enters the anaerobic treatment tank 10 from the top.

[0079] In actual application: there are 26 strip ecological bases, and a V-shaped slot is provided at the connection between the ecological base frame and the box body, which is convenient for quick disassembly and replacement. The ecological base is porous and fibrous, providing an attachment area for aerobic microorganisms. Six groups of aeration heads are installed at the bottom of the aerobic treatment tank, with a maximum gas production particle size of 1mm, a maximum air volume of 200L / min, and a maximum boost pressure of 40KPa. The piston aerator compresses the air to the bottom of the pool and releases it into the water through the aeration head to increase the dissolved oxygen content of the water and maintain the dissolved oxygen content at not less than 4mg / L. Water enters the bottom of the aerobic treatment tank and flows out from the top. The volume of the aerobic tank is 0.9m 3 The water stays for 25 to 140 minutes to fully contact the ecological base. The bottom of the aerobic treatment pool is a 1:10 slope, and a DN32 drain port is set at the lowest point to regularly discharge the bacterial film and impurities that fall off the attachment base. The aerobic treatment pool mainly performs physical adsorption and biological oxidation. Microorganisms oxidize ammonia nitrogen in the water into nitrate nitrogen, use dissolved organic phosphorus to remove suspended particles in the water, and decompose organic matter into harmless inorganic matter.

[0080] 5) The mixed sewage that has been aerobically treated and enters the anaerobic treatment tank 10 enters the anaerobic tank inlet 36A disposed at the upper part of the anaerobic treatment tank 10 and corresponds to the aerobic tank overflow outlet 36 disposed at the upper part of the aerobic treatment tank 9. After entering the anaerobic treatment tank 10, the treated mixed sewage first flows through the anaerobic filler mounting bracket 40 disposed in the isolation cavity of one side of the tank wall to be anaerobically treated; then, it passes through a plurality of vertical isolation plates 57 disposed in a non-partitioned manner in the inner cavity of the same tank body, and is discharged from the anaerobic tank overflow outlet 38 disposed on the tank wall on the other side of the cavity of the anaerobic treatment tank 10, and is sent to the ozone treatment tank 11 for ozone treatment;

[0081] In practical application: the anaerobic treatment tank is divided into 4 partitions with a volume of 0.9m 3 , the water retention time is 25 to 140 minutes, the water inlet to the water outlet is divided into one, two, three and four partitions in sequence, the partitions are adjacent and connected, and the first partition is provided with a deoxygenating filler sponge iron. The oxygen-rich water in the aerobic treatment tank first passes through the first partition and fully contacts with the deoxygenating filler to remove the dissolved oxygen in the water, so that the dissolved oxygen content in the water body is reduced to below 0.2 mg / L. The deoxygenating filler is placed in a mesh box. The filler is a consumable and can be easily removed and replaced after complete reaction. The water flows into the second, third and fourth partitions in turn. These three partitions are filled with attachment bases to provide a large attachment area for anaerobic microorganisms. The anaerobic nursing pool is a closed space with a one-way exhaust valve 13 on the top. When the internal air pressure is greater than the external air pressure, the gas in the box is discharged in real time, and the external air is prevented from entering. The denitrifying bacteria in the anaerobic treatment pool use undecomposed carbon-containing organic matter as a carbon source to reduce the nitrate nitrogen produced in the aerobic treatment pool to N2 and release it to the outside world.

[0082] 6) The anaerobically treated mixed sewage entering the ozone treatment tank 11 enters the treated mixed sewage in the ozone treatment tank 11 through the ozone treatment tank water inlet 38A at the upper part of the ozone treatment tank 11 corresponding to the anaerobic tank overflow outlet 38 at the upper part of the anaerobic treatment tank 10. After flowing into the ozone treatment tank 11, the treated mixed sewage entering the ozone treatment tank 11 is fully integrated with the water body in the process of flowing through multiple isolation plates 57 in the ozone treatment tank and at the same time under the action of ozone sprayed from the ozone explosion disk 56 arranged at the bottom of the tank. Finally, it enters the high light irradiation unit 51 arranged in the last isolation chamber from a high position, is irradiated by the xenon lamp tube in the high light unit 51, and the treated water becomes a qualified discharge water body after being irradiated by the xenon lamp and is discharged to the outside from the water outlet 6.

[0083] In practical application: the ozone treatment pool is divided into 4 partitions, with upper and lower partitions with openings to increase the water flow. The amount of ozone added is 0-3g / h, and the addition density is 2-5mg / L. Due to the strong oxidizing property of ozone, it can oxidize most viruses and spores. In addition, ozone forms an oxygen-rich environment in the water body to prevent the generation of odor. At the same time, ozone can open the unsaturated chemical bonds of colored organic matter and break the molecular bonds, thereby decolorizing the water. A high-pressure mercury lamp tube is installed in the water outlet, with a wavelength range of 240-380 and a power of 250W. Stainless steel reflectors are installed around the lamp tube. The treated water is irradiated by a high-pressure mercury lamp to degrade common antibiotics in the water body, such as tetracycline and oxytetracycline, and then discharged to the outside.

[0084] The above are only basic embodiments of the present invention given by the applicant according to the technical solution, and are not the whole of the present invention. Any similar improvement scheme proposed by any technician in the industry with reference to the basic technical solution should be deemed to fall within the protection scope of the present invention.

Claims

1. A decentralized integrated sewage treatment biological reaction device, comprising: A sewage collection tank (43), and an integrated sewage treatment device matched with the sewage collection tank, characterized in that the integrated sewage treatment device is composed of modularly arranged functional units: a pretreatment equipment unit (A), an inclined tube sedimentation treatment unit (B), an aerobic treatment unit (C), an anaerobic treatment unit (D), an ozone treatment unit (E) and a high light irradiation unit (51); The pretreatment equipment unit (A) comprises: a coagulation stirring tank (29) arranged in a main box (7), a liquid premixing tank (27), a main control box (22), a flow meter (17), a dosing metering pump (33), an ozone generator (26), an aeration pump (32), a frequency converter (52) and a delivery pipe; the coagulation stirring tank (29) is a funnel-shaped cavity, which is connected to the sewage collection tank (43) through a sewage delivery pipe (46) equipped with a flow meter (17) arranged on the upper part of the coagulation stirring tank (29), forming a sewage inlet channel, and the lower part thereof The liquid premixing tank (27) is connected to the inclined tube sedimentation treatment tank (8) in the inclined tube sedimentation treatment unit (B) through a coagulation tank output pipe (21) equipped with an emptying valve (31) and a coagulation tank output electric control valve (19); the liquid premixing tank (27) is also a funnel-shaped cavity, the upper part of which is introduced from the upper part of the coagulation stirring tank (29) into the inner cavity of the coagulation stirring tank through a liquid delivery pipe (47) equipped with a dosing metering pump (33), and the lower part is connected to the sewage outlet (2) through a delivery pipe equipped with a manual emptying valve (18), thereby forming a sewage pretreatment system in the pretreatment equipment unit (A); The inclined tube sedimentation treatment unit (B) comprises: an inclined tube sedimentation treatment tank (8), and an inclined tube upper support plate (24) and an inclined tube lower support plate (23) arranged in the tank body cavity of the inclined tube sedimentation treatment tank (8); a sawtooth overflow plate (25) is arranged on the upper part of the inclined tube upper support plate (24); two inclined tube sedimentation tank water outlets (34) are arranged on the tank wall of the inclined tube sedimentation treatment tank (8); a coagulation sewage input pipe (60) connected to the coagulation tank output pipe (21) at the lower part of the coagulation stirring tank is arranged on the inclined tube lower support plate (23); the bottom of the inclined tube sedimentation treatment tank (8) is funnel-shaped, and the funnel-shaped bottom is connected to the sewage main pipe (53) through an inclined tube sedimentation waste liquid discharge control valve (20); The aerobic treatment unit (C) comprises an aerobic treatment tank (9), a strip-shaped ecological base support (37) arranged in the tank body of the aerobic treatment tank (9), and an aeration plate (50) arranged at the bottom of the aerobic treatment tank, and two aerobic tank water inlets (34A) connected to the inclined tube sedimentation tank outlet (34) of the inclined tube sedimentation treatment tank (8) are arranged on the upper part of the tank wall adjacent to one side of the inclined tube sedimentation treatment tank (8), and two corresponding water inlet pipes are arranged inside the aerobic tank water inlet (58); at the same time, an aerobic tank overflow outlet (36) for communicating with the anaerobic treatment tank (10) of the next treatment process is provided on the inner wall of the other side of the tank body at a height corresponding to the strip-shaped ecological base support (37); an aerobic tank sewage outlet (35) is provided at the lower part of the tank body of the aerobic treatment tank (9), and the aerobic tank sewage outlet (35) is connected to the external sewage main pipe (53); in addition, a multi-layer horizontal isolation plate (59) is provided on the strip-shaped ecological base support (37); The anaerobic treatment unit (D) comprises an anaerobic treatment tank (10), a plurality of vertical isolation plates distributed in a non-partitioned manner are arranged in the inner cavity of the anaerobic treatment tank (10), an anaerobic filler mounting bracket (40) is arranged in the isolation cavity close to one side of the tank wall, a one-way exhaust valve (13) is arranged on the upper part of one side of the tank wall, and an anaerobic tank overflow outlet (38) for communicating with the inner cavity of the ozone treatment tank (11) of the next treatment process is arranged on the upper part of the other side of the tank wall; an anaerobic tank water inlet (36A) is arranged on the upper part of one side of the anaerobic treatment tank body provided with the anaerobic filler mounting bracket (40) and is communicated with the aerobic tank overflow outlet (36); an anaerobic tank sewage outlet (39) is arranged at the lower part of the tank body of the anaerobic treatment tank, and the anaerobic tank sewage outlet (39) is communicated with an external sewage main pipe (53); The ozone treatment unit (E) comprises an ozone treatment pool (11), a plurality of vertical isolation plates arranged in a non-partitioned manner in the inner cavity of the ozone treatment pool (11), an ozone explosion plate (56) arranged at the bottom of the pool, and a high-light irradiation unit (51) having a xenon lamp tube is arranged in the isolation cavity close to one side of the pool wall; an ozone pool water inlet (38A) is arranged on one side of the inner wall of the ozone treatment pool, which corresponds to and matches the anaerobic pool overflow outlet (38) arranged on the pool wall of the anaerobic treatment pool, forming a treatment channel for the ozone pool water inlet (38A) to bypass the plurality of vertical isolation plates, be irradiated by the xenon lamp tube in the high-light irradiation unit (51), and be discharged from the purified water outlet (6); at the same time, an ozone sewage outlet (5) is arranged at the lower part of the ozone treatment pool, and the ozone sewage outlet (5) is connected to an external sewage main pipe (53).

2. The decentralized integrated sewage treatment biological reaction device according to claim 1, characterized in that: The coagulation stirring tank (29) and the liquid premixing tank (27) are each provided with a corresponding coagulation tank agitator (30) and liquid premixing agitator (28).

3. The decentralized integrated sewage treatment biological reaction device according to claim 1, characterized in that: The sewage collection tank (43), the coagulation and stirring tank (29), the liquid premixing tank (27), the inclined tube sedimentation treatment tank (8), the aerobic treatment tank (9), the anaerobic treatment tank (10), and the ozone treatment tank (11) are each provided with a liquid level sensor (12) for controlling the liquid level.

4. The decentralized integrated sewage treatment biological reaction device according to claim 1, characterized in that: The bottoms of the inclined tube sedimentation treatment tank (8), aerobic treatment tank (9), anaerobic treatment tank (10), and ozone treatment tank (11) are all sloped towards the sewage main pipe.

5. The decentralized integrated sewage treatment biological reaction device according to claim 1, characterized in that: The sewage collection tank (43) is provided with a coarse grid (44) and a water pump (45), and the water pump (45) is connected to a sewage conveying pipe (46).

6. The treatment method of the decentralized sewage integrated treatment biological reaction device according to claim 1, characterized in that: The specific method of sewage treatment using the decentralized integrated sewage treatment biological reaction device of claim 1 is as follows: 1) First, according to the water quality of the sewage, solid flocculants and water are mixed in a liquid premixing tank (27) at a concentration of 2% to 5% to prepare a flocculation liquid for use; 2) Then, the pump (45) is started to suck the sewage in the sewage collection tank (43) that has been isolated by the coarse screen (44) through the sewage delivery pipe (46) and the flow meter (17) arranged in the sewage delivery pipe, and the sewage enters the inner cavity of the coagulation stirring tank (29) from the upper part; at the same time, the liquid premixing stirrer (28) arranged inside the liquid premixing tank (27) storing the flocculant prepared in a ratio of 2%-5% is continuously stirred, and then the liquid is pumped into the coagulation stirring tank (29) through the dosing metering pump (33), and the dosing metering pump adjusts the dosing speed in real time according to the water inlet speed to achieve the best liquid dosage ratio; the liquid entering the coagulation stirring tank is sent to the inclined tube sedimentation treatment tank (8) through the coagulation tank output pipe (21) provided with a coagulation tank output electric control valve (19) arranged at the lower part of the coagulation stirring tank (29) with a conical bottom under the action of the coagulation tank stirrer (30) arranged inside the tank; 3) The mixed sewage to which the coagulant solution has been added that enters the inclined tube sedimentation treatment tank (8) receives the mixed water to which the solution has been added from the coagulant stirring tank (29) through the coagulant sewage input pipe (60) disposed on the inclined tube lower support plate (23) in the inner cavity of the inclined tube sedimentation treatment tank, and performs natural sedimentation separation; The bottom water body containing floccules after flocculation and sedimentation treatment passes through a conical inclined tube sedimentation treatment tank (8), and the sediments at the bottom are collected at the center of the tank bottom. A waste liquid conveying pipe (41) is provided at the lowest end of the tank bottom. In the waste liquid conveying pipe (41), under the control of an inclined tube sedimentation waste liquid discharge control valve (20) provided in a sewage pipe, the inclined tube sedimentation waste liquid discharge control valve automatically opens after the sediment accumulates to a certain height, and the sediment flows through the pipeline to an external waste liquid storage tank; at the same time, the mixed water body after flocculation treatment in the upper part of the inclined tube sedimentation treatment tank (8) flows from the upper part into the aerobic treatment tank (9) through the inclined tube sedimentation tank outlet (34) for aerobic treatment; 4) the mixed sewage that has been treated with sedimentation in the aerobic treatment tank (9) enters the aerobic treatment tank (9) from the aerobic tank water inlet (34A) arranged at the upper part of the aerobic treatment tank (9) and corresponding to the water outlet (34) of the inclined tube sedimentation tank through the aerobic tank water inlet pipe and enters the aerobic treatment tank (9) from the lower part of the aerobic tank body. The air is compressed to the bottom of the tank by the action of the microorganisms attached to the strip-shaped ecological base support (37) arranged in the aerobic treatment tank body and the aeration disk (50) arranged at the bottom of the tank body and connected to the aeration pump (32) in the pretreatment equipment unit (A). The air is released into the water body through the aeration disk (50) at the bottom, thereby increasing the dissolved oxygen content of the water body, so that the mixed sewage that has been treated in the inclined tube sedimentation treatment tank in the tank has the oxygen content of the water body increased in the aerobic treatment tank; and is sent to the anaerobic treatment tank (10) through the aerobic tank overflow outlet (36) arranged at the upper part of the tank wall on the other side of the aerobic treatment tank body; 5) The mixed sewage that has been aerobically treated and enters the anaerobic treatment tank (10) enters the anaerobic treatment tank (10) from the anaerobic tank water inlet (36A) disposed at the upper part of the anaerobic treatment tank (10) and the upper part of the aerobic treatment tank (9) and corresponding to the aerobic treatment tank overflow outlet (36). After flowing into the anaerobic treatment tank (10), the treated mixed sewage first flows through the anaerobic filler mounting bracket (40) disposed in the isolation cavity of one side of the tank wall to be anaerobically treated; then, it passes through a plurality of vertical isolation plates disposed in a non-partitioned manner in the inner cavity of the same tank body, and is discharged from the anaerobic tank overflow outlet (38) disposed on the tank wall on the other side of the cavity of the anaerobic treatment tank (10), and is sent to the ozone treatment tank (11) for ozone treatment; 6) The anaerobically treated mixed sewage entering the ozone treatment tank (11) enters the treated mixed sewage in the ozone treatment tank (11) through the ozone tank inlet (38A) at the upper part of the ozone treatment tank (11) corresponding to the anaerobic tank overflow outlet (38) at the upper part of the anaerobic treatment tank (10). After flowing into the ozone treatment tank (11), the treated mixed sewage entering the ozone treatment tank (11) fully merges with the water body in the process of flowing through a plurality of vertical isolation plates in the ozone treatment tank and under the action of ozone sprayed from the ozone explosion disk (56) arranged at the bottom of the tank. Finally, the treated mixed sewage enters the high light irradiation unit (51) arranged in the last isolation chamber from a high position, and is irradiated by the xenon lamp tube in the high light irradiation unit (51). After the treated water becomes a qualified discharge water body after being irradiated by the xenon lamp, it is discharged to the outside through the purified outlet (6).

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