CN108328854A - A kind of country sewage integrated equipment for wastewater treatment and processing method - Google Patents

Abstract

The invention discloses an integrated treatment equipment and treatment method for rural sewage. The equipment mainly includes baffled anoxic biological filter, upflow biological aerated filter, inclined plate sedimentation tank and electric control cabinet; baffled anoxic biological filter and upflow biological aerated filter And the bottom is equipped with upper water distribution catchment area, filter screen plate, suspended ceramsite filter bed, filter bed fluidization buffer zone, air distribution device and bottom water distribution and collection device; water inlet pipe, return pipe, outlet pipe, gas distribution pipe, The backwash water inlet pipe, backwash drain pipe, aeration mixing pipe, water outlet pipe and mud discharge pipe are equipped with electric valves, and the electric valves are all connected with the electric control cabinet; the electric control cabinet is also respectively connected with the blower and the backwash water pump. The equipment of the present invention integrates the functions of primary sewage filtration, reflux denitrification and denitrification, biodegradation and nitrification, coagulation and precipitation phosphorus removal, etc., is highly efficient and energy-saving, realizes unattended operation through network remote control, and is suitable for rural sewage treatment.

Description

A kind of rural sewage integrated treatment equipment and treatment method

technical field

The invention relates to the technical field of sewage treatment, in particular to an integrated treatment equipment and treatment method for rural sewage.

Background technique

In recent years, people's living standards in rural areas have been continuously improved, water consumption has increased year by year, and at the same time, the discharge of rural sewage has increased. The water quality of rural sewage is close to that of urban domestic sewage, and the concentration of organic matter, nitrogen, phosphorus and other pollutants is relatively high. Because in rural areas, the scale of sewage treatment is small, the farmers live in scattered places, it is difficult to collect sewage, and it is difficult to collect large-scale centralized treatment. It is suitable to use unattended integrated sewage treatment equipment for small-scale domestic sewage.

At present, research on rural sewage treatment processes tends to be diversified, but mainly includes natural ecological treatment systems using soil as a carrier for collection and discharge, traditional treatment systems using complex biological and physical processes, and small sewage treatment devices. Natural ecological treatment systems such as artificial wetlands occupy too large an area, require high investment costs, complex management, and unsatisfactory effluent results; commonly used traditional domestic sewage treatment processes such as anaerobic-anoxic-aerobic activated sludge process, activated sewage Sludge often has abnormalities, or sludge bulking, or sludge disintegration, so someone needs to be on duty to take timely measures against abnormalities in activated sludge; although small sewage treatment devices such as membrane bioreactors have achieved structural integration, However, the equipment investment is relatively high, and the operating power consumption is relatively large.

Therefore, in view of the characteristics of rural sewage and the shortcomings of existing technologies such as complex management, high investment and operation costs, and poor treatment effects, it is necessary to seek an integrated rural sewage treatment equipment that can be unattended, low investment and operation costs, and highly efficient and energy-saving.

Contents of the invention

The purpose of the present invention is to address the shortcomings of the existing rural sewage treatment process, to provide a sewage treatment system that integrates the functions of primary sewage filtration, reflux denitrification denitrification, biodegradation nitrification, coagulation precipitation phosphorus removal, etc., with low investment and operation costs, high efficiency and energy saving Integrated rural sewage treatment equipment and treatment methods.

The processing flow of the equipment of the present invention is "baffle type anoxic biological filter → upflow type aerated biological filter → inclined plate sedimentation tank". The baffle type anoxic biological filter is separated by three vertical baffles into an up and down return sewage channel, which is divided into three stages. The first stage anoxic biological filter is preferably made of shale ceramsite with a particle size of ￠12-16mm. Shale ceramsite with a particle size of ￠8-12mm is preferred for the secondary anoxic biofilter, and shale ceramsite with a particle size of ￠4-8mm is preferred for the third-stage anoxic biological filter. The particle size of the filter material decreases gradually. Suspended solids can be better intercepted in the filter bed, and serious clogging of the filter material can be avoided at the same time, and the pretreatment of the initial filtration can be realized to protect the normal operation of the subsequent biological filter; a denitrification biofilm can be grown on the surface of the filter material to utilize the carbon source in the sewage The nitrate is converted into nitrogen and released to complete biological denitrification. The three-stage anoxic biological filter can grow biofilms of various dominant bacterial species, and the effect of degrading organic matter is good. The main function of the upflow biological aerated filter is to grow nitrification biofilm on the surface of the filter material, oxidize the ammonia nitrogen and organic nitrogen in the sewage into nitrate, and also grow a heterotrophic biofilm on the surface of the filter material to further degrade organic matter. Add flocculant to the outlet channel to complete the coagulation. The inclined plate sedimentation tank will settle the coagulated sewage to remove phosphorus, suspended solids and residual organic matter. The invention can also be remotely controlled through the network to realize unattended operation, and this feature is also especially suitable for rural sewage treatment.

The purpose of the present invention is achieved through the following technical solutions:

An integrated treatment equipment for rural sewage, characterized in that it mainly includes a baffled anoxic biological filter, an upflow biological aerated filter, an inclined plate sedimentation tank and an electric control cabinet; the baffled anoxic biological The filter is separated by three vertical baffles into the first-stage anoxic biological filter, the second-stage anoxic biological filter and the third-stage anoxic biological filter; the first-stage anoxic biological filter, The second-stage anoxic biological filter, the third-stage anoxic biological filter and the upflow biological aerated filter are equipped with upper water distribution catchment area, filter plate, suspended ceramsite filter bed, filter Bed fluidized buffer zone, air distribution device and bottom water distribution and collection device; the upper water distribution and collection area of the first-stage anoxic biological filter is connected to the water inlet pipe, and the bottom water distribution and collection device is connected to the second-stage anoxic biological filter. The bottom water distribution and collection device is connected, the upper water distribution catchment area of the second-stage anoxic biological filter is connected with the upper water distribution catchment area of the third-stage anoxic biological filter, and the bottom water distribution and collection area of the third-stage anoxic biological filter The device is connected with the water distribution and collection device at the bottom of the upflow biological aerated filter;

The upper water distribution catchment area of the upflow biological aerated filter is connected with the upper water distribution catchment area of the first-stage anoxic biological filter through the return pipe, the return pipe is connected with the gas distribution pipe, and the return pipe is provided with an air lift device , There is a collection channel on one side of the upper water distribution catchment area of the upflow biological aerated filter tank, and an aeration mixing pipe and a backwash water pump are installed inside the water collection canal. The aeration mixing pipe is connected to the air distribution pipe, and the backwash water pump passes The water inlet pipes are respectively connected to the upper water distribution catchment area of the first-stage anoxic biological filter, the second-stage anoxic biological filter, and the third-stage anoxic biological filter; the baffle-type anoxic biological filter and the upflow The air distribution device at the bottom of the biological aerated filter is connected to the blower through the air distribution pipe, and the water distribution and collection device at the bottom is connected to the backwash drainage pipe;

The inclined plate sedimentation tank is provided with an upper water distribution catchment area, a sedimentation area and a sludge hopper in sequence from top to bottom, and the sedimentation area is provided with an inclined plate and a central pipe; the central pipe of the inclined plate sedimentation tank is connected with the upflow type The water collection channel of the gas biological filter is connected, the upper water distribution catchment area of the inclined plate sedimentation tank is connected with the outlet pipe, and the bottom sludge bucket is connected with the sludge discharge pipe;

The water inlet pipe, return pipe, water outlet pipe, gas distribution pipe, backwash water inlet pipe, backwash drain pipe, aeration mixing pipe, water outlet pipe and mud discharge pipe are equipped with electric valves, and the electric valves are all connected to the electric control cabinet ; The electric control cabinet is also connected to the air blower and the backwash water pump respectively.

In order to further realize the purpose of the present invention, preferably, the filter material of the first-stage anoxic biological filter adopts shale ceramsite with a particle diameter of ￠12～16mm; the filter material of the second-stage anoxic biological filter adopts a particle diameter of Shale ceramsite is ￠8～12mm; the filter material of the third stage anoxic biological filter adopts shale ceramsite with particle size ￠4～8mm.

Preferably, the filter material of the upflow biological aerated filter adopts shale ceramsite with a particle size of ￠4-8mm.

Preferably, the shale ceramsite water-wetting particles with different particle sizes have a particle density of 0.95±0.5g/cm ³ , and interact with the screen plate to form a suspended state in water.

Preferably, the height of the suspended ceramsite filter bed is 1-2m, and the height of the fluidized buffer zone of the filter bed is 0.3-0.5m.

Preferably, the electric control cabinet is connected to the background through the network.

Preferably, the electric control cabinet is arranged outside the inclined plate sedimentation tank.

Preferably, a door is provided on one side of the inclined plate sedimentation tank.

The integrated rural sewage treatment method using the above-mentioned equipment: the sewage enters the baffle type anoxic biological filter, and turns up and down to pass through the first-stage anoxic biological filter, the second-stage anoxic biological filter and the third-stage anoxic biological filter. The biological filter removes organic matter and large suspended solids; the effluent of the third-stage anoxic biological filter is evenly distributed upwards from the bottom water distribution and collection device into the upflow biological aerated filter; the compressed air enters the upflow type through the air distribution device The biological aerated filter is aerated to nitrify ammonia nitrogen and degrade the residual organic matter in the sewage; the upflow effluent of the upflow biological aerated filter reaches the upper water distribution catchment area; the upflow biological aerated filter water distribution catchment area A part of the effluent flows back to the first-stage anoxic biological filter water distribution catchment area, where it is mixed with raw sewage for denitrification and denitrification, and the other part of the effluent enters the water collection channel, and the compressed air aerates the effluent through the aeration mixing tube, and is mixed with the dosing The medicaments are fully mixed for coagulation; the effluent after coagulation enters the sedimentation area of the inclined plate sedimentation tank for precipitation, and further removes phosphorus, suspended solids and organic matter. The water comes out of the water pipe and settles into the sludge hopper. The sludge is discharged through the sludge pipe.

The biofilter purifies sewage with biofilm, and there is no phenomenon of sludge bulking and sludge disintegration, which is conducive to realizing unattended operation. Since the treatment of domestic sewage in rural areas has relatively high requirements for total nitrogen, it is suitable to adopt the two-stage serial reflux combination process of pre-denitrification biological filter and nitrification aerated biological filter. In the traditional fixed bed biological filter, the loss of filtration head is too large, and the average particle size of suspended solids in the influent should not exceed 2mm, and the concentration of suspended solids in the influent should not exceed 60 mg/L. The present invention adopts a fluidized bed biological filter, and at the same time The pre-denitrification biological filter uses shale ceramsite with different particle sizes to intercept and filter suspended solids.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The same kind of biological filter is used in baffle series, with pretreatment function, shared aeration and air-water backwashing system, and adopts air lift backflow at the same time, highly integrated and economical in investment and operation costs.

(2) Shale ceramsite filter materials with different particle sizes are used, and the fluidized buffer zone of the filter bed is reserved at the same time. The filter material is in a fluidized state during normal operation, and it is not suitable for compaction. The backwash cycle is long, the service life of the filter material is long, and the operation and maintenance costs are low. Low.

(3) The present invention integrates the functions of sewage primary filtration, reflux denitrification and denitrification, biodegradation and nitrification, coagulation and precipitation phosphorus removal, etc., and has strong biofilm activity, good renewal conditions, stability, reliability, high efficiency and energy saving.

(4) The automatic management of the present invention is simple and reliable, and the electric control cabinet can control the switch of blower, mud pump, submersible pump and electric valves of each pipeline, so that the equipment can operate normally according to the program, and the electric control cabinet can also be remotely controlled through the network. Unattended, suitable for rural sewage treatment.

Description of drawings

Fig. 1 is a structural schematic diagram of the rural sewage integrated treatment equipment of the present invention.

FIG. 2 is a top view of FIG. 1 .

The figure shows: baffle type anoxic biological filter 1, first-stage anoxic biological filter 1-1, second-stage anoxic biological filter 1-2, third-stage anoxic biological filter 1-3 , upflow biological aerated filter 2, catchment channel 2-1, inclined plate sedimentation tank 3, sedimentation area 3-1, inclined plate 3-2, central pipe 3-3, sludge hopper 3-4, upper water distribution Water collection area 4, filter screen plate 5, suspended ceramsite filter bed 6, filter bed fluidization buffer zone 7, air distribution device 8, bottom water collection and air distribution device 9, water inlet pipe 10, return pipe 11, air lift device 11 ‐1. Air distribution pipe 12, backwash water inlet pipe 13, backwash drain pipe 14, aeration mixing pipe 15, water outlet pipe 16, mud discharge pipe 17, backwash water pump 18, blower 19, electric control cabinet 20, door 21, Electric valve 22.

Detailed ways

In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in Figure 1 and Figure 2, an integrated rural sewage treatment equipment mainly includes a baffle type anoxic biological filter 1, an upflow type aerated biological filter 2, an inclined plate sedimentation tank 3 and an electric control cabinet 20 ; The baffle type anoxic biological filter 1 and the upflow type biological aerated filter 2 are provided with the upper water distribution catchment area 4, the filter plate 5, the suspended ceramsite filter bed 6, and the fluidized filter bed in sequence from top to bottom Buffer zone 7, air distribution device 8 and bottom water distribution and collection device 9; inclined plate sedimentation tank 3 is provided with upper water distribution and catchment area 4, sedimentation area 3-1 and sludge bucket 3-4 from top to bottom, and sedimentation area 3-1 is provided with inclined plate 3-2 and central pipe 3-3; baffled anoxic biological filter 1, upflow biological aerated filter 2 and inclined plate sedimentation tank 3 are connected in sequence.

The baffle type anoxic biological filter 1 is separated by three vertical baffles into the first-stage anoxic biological filter 1-1, the second-stage anoxic biological filter 1-2 and the third-stage anoxic Biofilter 1-3, the upper water distribution catchment area 4 of the first-stage anoxic biological filter 1-1 is connected to the water inlet pipe 10, and the bottom water distribution and collection device 9 is connected to the second-stage anoxic biological filter 1-2 The bottom water distribution and collection device 9 is connected, the upper water distribution catchment area 4 of the second-stage anoxic biological filter 1-2 is connected with the upper water distribution catchment area 4 of the third-stage anoxic biological filter 1-3, and the third-stage anoxic biological filter 1-3 is connected. The water distribution and collection device 9 at the bottom of the oxygen biological filter 1-3 communicates with the water distribution and collection device 9 at the bottom of the upflow biological aerated filter 2. The upper water distribution catchment area 4 of the upflow biological aerated filter 2 is connected with the upper water distribution catchment area 4 of the first-stage anoxic biological filter 1-1 through the return pipe 11, and the return pipe 11 is connected with the gas distribution pipe 12, and the return flow An air lift device 11-1 is provided on the pipe 11, and the effluent of the upflow biological aerated filter 2 flows into the return pipe 11 due to the action of gravity, and the upflow biological aerated filter is discharged through the action of the air lift device 11-1 and compressed air. Part of the effluent of 2 is directed to the upper water distribution catchment area 4 of the first-stage anoxic biological filter 1-1, and the upper water distribution catchment area 4 of the upflow biological aerated filter tank 2 is equipped with a water collection channel 2-1 on one side, and the water collection channel 2-1 There is an aeration mixing pipe 15 and a backwashing water pump 18 inside, the aeration mixing pipe 15 is connected to the gas distribution pipe 12, and the backwashing water pump 18 is respectively connected to the first-stage anoxic biological filter 1-1 through the backwashing water inlet pipe 13 1. The upper water distribution catchment area 4 of the second-stage anoxic biological filter 1-2 and the third-stage anoxic biological filter 1-3 are connected. The bottom air distribution device 8 of the baffle type anoxic biological filter 1 and the upflow biological aerated filter 2 is connected to the blower 19 through the air distribution pipe 12 , and the bottom water distribution and collection device 9 is connected to the backwash drain pipe 14 . The central pipe 3-3 of the inclined plate sedimentation tank 3 is connected with the catchment channel 2-1 of the upflow biological aerated filter 2, the upper water distribution catchment area 4 of the inclined plate sedimentation tank 3 is connected with the outlet pipe 16, and the bottom sewage The mud bucket 3‐4 is connected with the mud discharge pipe 17.

The first-stage anoxic biological filter 1-1 filter material uses shale ceramsite with a particle size of ￠12-16mm, and the second-stage anoxic biological filter 1-2 filter material uses a particle size of ￠8-12mm shale ceramics shale ceramsite with a particle size of ￠4-8mm for the filter material of the third anoxic biological filter 1‐3, and shale ceramsite with a particle size of ￠4～8mm for the filter material of the upflow biological aerated filter 2 The above-mentioned shale ceramsite water infiltration particle density of different particle sizes is 0.95±0.5g/cm ³ , interacts with the filter screen plate 5 to form a suspended state in the water, and the height of the suspended ceramsite filter bed 6 is 1-2m. The height of the fluidized buffer zone 7 of the filter bed is 0.3-0.5m. During normal operation, the filter material of the suspended ceramsite filter bed 6 is in an expanded fluidized state. Water inlet pipe 10, return pipe 11, gas distribution pipe 12, backwash water inlet pipe 13, backwash drain pipe 14, aeration mixing pipe 15, water outlet pipe 16 and mud discharge pipe 17 are all equipped with electric valve 22, and electric valve 22 all It is connected with the electric control cabinet 20; the electric control cabinet 20 is also connected with the air blower 19 and the backwash water pump 18 respectively; The program runs normally, and the electric control cabinet 20 is arranged on the outside of the inclined plate sedimentation tank 3 to control the switch of the backwash water pump 18, the blower 19 and the electric valves 22 of each pipeline to make the equipment run normally. The electric control cabinet 20 includes a complete set of electrical equipment, manual buttons and touch screen control and signal transmitter receivers; the electric control cabinet 20 is connected to the background through the network, and the background remotely controls the electric control cabinet 20 through the network, and can be operated remotely through the network to realize the equipment according to the program Normal operation, unattended. The rural sewage integrated treatment equipment has a closed box structure, and a door 21 is provided on one side of the inclined plate sedimentation tank 3 . The device interior can be accessed through the device door 21 to operate and maintain related devices. Normally, the door 21 is closed and locked to prevent others from entering the device.

Integrated rural sewage treatment method using integrated rural sewage treatment equipment: sewage enters the baffled anoxic biofilter 1, and turns up and down to pass through the first-stage anoxic biofilter 1-1, the second-stage anoxic biofilter Pool 1-2 and third-stage anoxic biofilter 1-3 remove organic matter and large suspended solids; the effluent from third-stage anoxic biofilter 1-3 distributes water upward evenly from the bottom water distribution and collection device 9 and enters the upflow Type biological aerated filter 2 suspended ceramsite filter bed 6, compressed air enters the suspended ceramsite filter bed 2 through the biological aerated filter 2 air distribution device 8 for aeration, nitrifies ammonia nitrogen and degrades the residual organic matter in the sewage, and raises the effluent Reach the upper water distribution catchment area 4; part of the effluent from the upflow biological aerated filter 2 water distribution catchment area 4 returns to the first-stage anoxic biological filter 1-1 water distribution catchment area 4, mixes with raw sewage, and carries out Denitrification and denitrification, the other part of the effluent enters the water collection channel 2-1, and the compressed air passes through the aeration mixing tube 15 to aerate the effluent, so as to fully mix with the dosed chemical for coagulation; the coagulated effluent enters the inclined plate Sedimentation tank 3 Sedimentation area 3-1 conducts sedimentation to further remove phosphorus, suspended solids and organic matter, and the rising effluent enters the water collection and distribution area 4 through the sloping plate 3-2, and then collects to the outlet pipe 16 to discharge the water, and settles to the sludge hopper 3 The sludge in -4 is discharged through the sludge pipe 17.

The baffle type anoxic biological filter 1 needs to be backwashed to restore its filtration head after a period of time between operations, and air-water combined backwashing is used. When backwashing the first-stage anoxic biological filter 1-1, the equipment stops adding flocculant for five minutes and then stops water intake, and opens the electric valve of the gas distribution pipe 12 at the bottom of the first-stage anoxic biological filter 1-1 22. The compressed air flows through the air distribution pipe 12 to the air distribution device 8 at the bottom of the first-stage anoxic biological filter 1-1, and evenly aerates the filter to increase the fluidization expansion degree of the suspended ceramsite filter bed 6, and shed biofilm and impurities Sink to the bottom, open the backwash water pump 18 after five minutes of aeration, and pump the clean water from the outlet channel 2-1 through the backwash inlet pipe 14 into the first-stage anoxic biological filter 1-1 water distribution catchment area 4, and flow into The suspended ceramsite filter bed 6 is combined with air and water for cleaning, and at the same time, the bottom is opened to discharge the sewage containing impurities out of the pool. After ten minutes, the backwashing water pump 18 is turned off and the aeration and drainage are stopped, and the water intake and dosing are resumed, thereby completing the second stage. Backwashing of primary anoxic biofilter 1‐1. The second-stage anoxic biofilter 1-2 and the third-stage anoxic biofilter 1-3 are backwashed in the same way. The suspended ceramsite filter bed 6 of the upflow biological aerated filter 2 is always in the state of aeration and fluidization, and no backwashing is required.

The invention adopts similar biological filters to be baffled and connected in series, has a pretreatment function, shares aeration and air-water backwashing systems, and adopts air-lifting and reflux at the same time, is highly integrated, and has economical investment and operation costs.

The present invention uses shale ceramsite filter materials with different particle sizes, and reserves a fluidized buffer zone for the filter bed. The filter material is in a fluidized state during normal operation, and is not suitable for compaction. The backwash cycle is long, the service life of the filter material is long, and the operation and maintenance cost is low. .

The invention integrates the functions of primary sewage filtration, reflux denitrification and denitrification, biodegradation and nitrification, coagulation and precipitation phosphorus removal, etc., and has strong biofilm activity, good renewal conditions, stability and reliability, and high efficiency and energy saving.

The automatic management of the present invention is simple and reliable, and the electric control cabinet can control the switch of blower, mud pump, submersible pump and electric valves of each pipeline, so that the equipment can operate normally according to the program, and the electric control cabinet can be remotely controlled through the network to realize unattended operation , suitable for rural sewage treatment.

Claims (9)

1. A rural sewage integrated treatment equipment is characterized in that it mainly includes a baffle type anoxic biological filter, an upflow type biological aerated filter, an inclined plate sedimentation tank and an electric control cabinet; The oxygen biofilter is separated by three vertical baffles into the first-stage anoxic biofilter, the second-stage anoxic biofilter and the third-stage anoxic biofilter; the first-stage anoxic biofilter Pool, the second-stage anoxic biological filter, the third-stage anoxic biological filter and the upflow biological aerated filter are provided with the upper water distribution catchment area, filter plate, and suspended ceramsite filter bed in sequence from top to bottom. , filter bed fluidization buffer zone, air distribution device and bottom water distribution and collection device; the upper water distribution and collection area of the first-stage anoxic biological filter is connected to the water inlet pipe, and the bottom water distribution and collection device is connected to the second-stage anoxic biological filter The bottom water distribution and collection device of the pool is connected, the upper water distribution catchment area of the second-stage anoxic biological filter is connected with the upper water distribution catchment area of the third-stage anoxic biological filter, and the bottom water distribution of the third-stage anoxic biological filter The water collecting device is connected with the water distribution and collecting device at the bottom of the upflow biological aerated filter; The upper water distribution catchment area of the upflow biological aerated filter is connected with the upper water distribution catchment area of the first-stage anoxic biological filter through the return pipe, the return pipe is connected with the gas distribution pipe, and the return pipe is provided with an air lift device , There is a collection channel on one side of the upper water distribution catchment area of the upflow biological aerated filter tank, and an aeration mixing pipe and a backwash water pump are installed inside the water collection canal. The aeration mixing pipe is connected to the air distribution pipe, and the backwash water pump passes The water inlet pipes are respectively connected to the upper water distribution catchment area of the first-stage anoxic biological filter, the second-stage anoxic biological filter, and the third-stage anoxic biological filter; the baffle-type anoxic biological filter and the upflow The air distribution device at the bottom of the biological aerated filter is connected to the blower through the air distribution pipe, and the water distribution and collection device at the bottom is connected to the backwash drainage pipe; The inclined plate sedimentation tank is provided with an upper water distribution catchment area, a sedimentation area and a sludge hopper in sequence from top to bottom, and the sedimentation area is provided with an inclined plate and a central pipe; the central pipe of the inclined plate sedimentation tank is connected with the upflow type The water collection channel of the gas biological filter is connected, the upper water distribution catchment area of the inclined plate sedimentation tank is connected with the outlet pipe, and the bottom sludge bucket is connected with the sludge discharge pipe; The water inlet pipe, return pipe, water outlet pipe, gas distribution pipe, backwash water inlet pipe, backwash drain pipe, aeration mixing pipe, water outlet pipe and mud discharge pipe are equipped with electric valves, and the electric valves are all connected to the electric control cabinet ; The electric control cabinet is also connected to the air blower and the backwash water pump respectively. 2. The rural sewage integrated treatment equipment according to claim 1, characterized in that, the filter material of the first-stage anoxic biological filter adopts shale ceramsite with a particle size of ￠12-16mm; The filter material of the oxygen biological filter uses shale ceramsite with a particle size of ￠8-12 mm; the filter material of the third-stage anoxic biological filter uses shale ceramsite with a particle size of ￠4-8 mm. 3. The rural sewage integrated treatment equipment according to claim 1, characterized in that the filter material of the upflow biological aerated filter adopts shale ceramsite with a particle size of ￠4-8mm. 4. The rural sewage integrated treatment equipment according to claim 2 or 3, characterized in that the shale ceramsite water infiltration particle density of different particle sizes is 0.95±0.5g/cm ³ , and interacts with the filter screen plate in water into a suspended state. 5. The rural sewage integrated treatment equipment according to claim 1, characterized in that the height of the suspended ceramsite filter bed is 1-2m, and the height of the fluidized buffer zone of the filter bed is 0.3-0.5m. 6. The rural sewage integrated treatment equipment according to claim 1, characterized in that the electric control cabinet is connected to the background through the network. 7. The rural sewage integrated treatment equipment according to claim 1, characterized in that, the electric control cabinet is arranged outside the inclined plate sedimentation tank. 8. The rural sewage integrated treatment equipment according to claim 1, wherein a door is provided on one side of the inclined plate sedimentation tank. 9. The rural sewage integrated treatment method using the equipment described in claim 1 is characterized in that, the sewage enters the baffle type anoxic biological filter, and turns up and down to pass through the first-level anoxic biological filter and the second-level anoxic biological filter successively. The biological filter and the third-stage anoxic biological filter remove organic matter and large suspended particles; the effluent of the third-stage anoxic biological filter is evenly distributed upward from the bottom water distribution and collection device into the upflow biological aerated filter; compression The air enters the upflow biological aerated filter through the air distribution device for aeration, nitrifies ammonia nitrogen and degrades the residual organic matter in the sewage; the upflow effluent of the upflow biological aerated filter reaches the upper water distribution catchment area; the upflow aeration Part of the effluent from the distribution catchment area of the aerobic biological filter flows back to the distribution catchment area of the first-stage anoxic biological filter, where it is mixed with the raw sewage for denitrification and denitrification, and the other part of the effluent enters the catchment channel, and the compressed air is aerated and mixed The tube aerates the effluent and fully mixes it with the dosing agent for coagulation; the coagulated effluent enters the sedimentation zone of the inclined plate sedimentation tank for sedimentation, further removes phosphorus, suspended solids and organic matter, and the effluent passes through the inclined plate of the sedimentation zone After entering the water collection and distribution area, it is collected to the outlet pipe to discharge the water, and the sludge is deposited in the sludge hopper and discharged through the sludge pipe.