CN206408055U - Aeration type sewage treatment device - Google Patents

Abstract

The utility model mainly discloses an aerated sewage treatment device, and its technical scheme includes: a primary sedimentation tank, a biodegradation tank and a disinfection tank, a filter device is arranged in the primary sedimentation tank, the filter device includes a filter plate and a collection box, the filter plate separates the primary sedimentation tank into a first cavity and a second cavity, the collection box is located at the bottom of the first cavity, the biodegradation tank includes an anaerobic tank, an aerobic tank and a clarification tank connected to each other, a biological filler rack is arranged in the anaerobic tank, an anaerobic microbial filler is arranged on the biological filler rack, an aeration device is arranged in the aerobic tank, the aeration device includes a lifting cylinder, a spiral aerator and a rotating disc, and an aerobic microbial filler is arranged on the rotating disc. The utility model performs multi-stage graded treatment on sewage, so as to better separate and degrade various harmful substances in sewage, and is not prone to blockage, and has high treatment efficiency and good effect, so that the treated sewage meets the national discharge standard.

Description

An aeration type sewage treatment device

technical field

The utility model relates to an aeration type sewage treatment device.

Background technique

High-concentration organic wastewater discharged from food, biology, chemical and other industries contains a large amount of ammonia, nitrogen, phosphorus, etc., and is discharged into rivers and lakes to cause eutrophication of water bodies. Eutrophication of water body refers to that nutrients such as nitrogen and phosphorus required by organisms enter lakes, estuaries, bays and other slow-flowing water bodies in large quantities, causing algae and other plankton to multiply rapidly, the dissolved oxygen in the water body decreases, and the water quality deteriorates. The phenomenon of mass death of living things. In recent years, the problems of water environmental pollution and water eutrophication have become increasingly serious, and organic matter, nitrogen, and phosphorus are the main factors causing water eutrophication. The more stringent, the research and development of economical and efficient sewage treatment technology has always been a hot spot in the field of water pollution control engineering. Among the existing sewage treatment equipment, the common equipment is that sewage is treated through sedimentation tanks, biodegradation tanks, etc. With the development of economy and the advancement of urbanization, the discharge of industrial sewage has increased significantly. The rapid increase in population has caused great changes in the amount and quality of sewage entering urban sewage treatment plants, mainly manifested in a substantial increase in the amount of sewage and an increase in the pollutant indicators of sewage inflow. Overload operation, the water quality is difficult to guarantee, and the sewage discharge standard cannot be met; in addition, some low-concentration and easily degradable wastewater can be treated by a combination of traditional processes, but there is still a lack of effective methods for some high-concentration and poorly biodegradable wastewater. and economical method.

Utility model content

The purpose of this utility model is to provide an aeration type sewage treatment device for many deficiencies in the prior art, which can carry out multi-stage graded treatment of sewage, better separate and degrade various harmful substances in sewage, and prevent blockage Phenomenon, high treatment efficiency and good effect, making the treated sewage meet the national discharge standards.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

An aeration type sewage treatment device includes a primary sedimentation tank, a biodegradation tank and a disinfection tank. A filter device is arranged in the primary sedimentation tank. The filter device includes a filter plate and a collection box. The filter plate is vertically arranged in the primary sedimentation tank. The filter plate will The primary settling tank is divided into a first cavity and a second cavity, and a filter hole is provided on the filter plate, and a filter screen is arranged on the filter hole, the collection box is located at the bottom of the first cavity, and the biodegradation tank includes interconnected facultative tank, aerobic tank and clarification tank, the facultative tank is equipped with a biological filler rack, the biological filler rack includes a vertical tube and a biological plate, the biological plate is set up and down on the vertical tube, and the biological plate is equipped with a facultative microbial filler, There is an aeration device in the aerobic tank. The aeration device includes a lifting cylinder, a spiral aerator and a rotating disk. The spiral aerator is installed on the upper side of the lifting cylinder. It is fixedly connected with the rotating disk, and the rotating disk is provided with aerobic microbial filler.

Further, a baffle is also provided in the first cavity, the baffle is located above the filter screen, the baffle is in a "Z" shape, and the surface of the baffle is covered with a precipitant. The zigzag setting of the baffle reduces the water flow speed, reduces the impact of the water flow on the filter, and avoids damage to the filter. At the same time, the sewage and the baffle are fully contacted, so that the precipitant and the substances in the sewage can fully react, and the water in the water body The pollution and harmful substances contained in the filter are separated, so that they form larger particles and settle into the collection box, or cannot pass through the filter screen and remain in the first chamber.

Further, a cleaning device is provided on the filter plate, and the cleaning device includes a cleaning cylinder, a cleaning motor and a cleaning roller, and a chute is arranged on the filter plate horizontally above the filter screen, and the cleaning cylinder is slidably connected to the chute through a slide block, and the cleaning cylinder The lower side of the motor is connected with the cleaning motor, and the output shaft of the cleaning motor is connected with the cleaning roller through the connecting shaft, and the cleaning roller is evenly provided with soft bristles. During the process of filtering the sewage through the filter, some flocculent or viscous substances are easy to adhere to the filter, blocking the filter mesh and affecting the drainage speed. The permeability of the net improves the drainage efficiency, and the cleaned impurities fall into the collection box and deposit in the collection box to avoid re-contamination of the primary sedimentation tank; when cleaning, the cleaning cylinder drives the cleaning motor and the cleaning roller to move downward, Until the cleaning roller faces the filter net, then start the cleaning motor, which drives the cleaning roller to rotate through the connecting shaft to realize the cleaning of the filter net. At the same time, the cleaning cylinder moves left and right along the chute driven by the driver, so that the cleaning roller Move left and right on the filter net to clean the filter net in all aspects, and the cleaning effect is good.

Further, an inflator is provided in the second cavity, and the inflator includes an inflator, an intake main pipe, a first air intake branch pipe and a second air intake branch pipe, one end of the air intake main pipe is connected to the inflator, and the other end of the air intake main pipe is connected to the air intake main pipe. They are respectively connected with the first air intake branch pipe and the second air intake branch pipe, the mouth of the first air intake branch pipe faces the filter screen, and the mouth of the second air intake branch pipe is located in the aerobic pool. The installed inflator uses the inflator to ventilate the intake main pipe, the first intake branch pipe and the second intake branch pipe. On the one hand, the inflation device backwashes the filter screen through the first intake branch pipe, and further cleans the impurities on the filter screen. , to ensure the filtering effect, and on the other hand, aerate the facultative tank through the second air intake branch pipe to provide oxygen for the facultative microorganisms in the facultative tank, create a good living environment for facultative microorganisms, and improve the survival of facultative microorganisms rate and save energy.

Further, the bottom of the collection box is provided with a cutting impeller, a weight detector and a valve, the cutting impeller is provided with at least two layers of cutting blades, the weight detector is connected to the valve, and a sewage pipe is arranged at the valve. The cutting impeller is used to cut the impurities in the collection box, and the larger impurities are cut into smaller impurities to avoid blocking the sewage pipe. The multi-layer cutting blades are set to improve the cutting efficiency. The weight detector is used to Detect the weight of the impurities collected in the collection box. When the weight of the impurities reaches the standard, the valve is opened to discharge the impurities through the sewage pipe, so as to avoid the overflow of the collection box and maintain the capacity of the collection box.

Further, the center of the rotating disk is provided with a through hole, the rotating disk is connected to the rotating shaft through the through hole, the rotating shaft is a hollow shaft, the upper side of the rotating disk is evenly distributed with spiral blades according to the circumference, and the aerobic microbial filler is arranged on the corresponding Between the adjacent spiral blades, rollers are provided on the lower side of the rotating disc, and a support plate is provided on the rotating shaft below the rotating disc. The support disc is provided with an annular slideway, and the rollers are slidably connected to the annular slideway. The rotating shaft is set as a hollow shaft to facilitate the circulation of air. The helical blades set on the rotating disk make the rotating disk rotate under the drive of the spiral aerator, and the helical blades stir the water body to speed up the flow of the water body and make it better. Oxygen microorganisms are in full contact with the sewage, and the reaction is more efficient; the set rotating disc is slidably connected to the supporting disc through rollers, which improves the rotation stability of the rotating disc and the firmness of the installation, reduces the impact of the water flow on the rotating disc, and prolongs the life of the rotating disc. life span.

Further, a water quality detector, a controller, a water pump, a return pipe and a water delivery pipe are arranged in the clarification tank, the controller is respectively connected with the water quality detector and the water pump, and the return pipe is connected with the aerobic tank through the water pump. The set water quality detector is used to detect the water in the clarification tank, and send the test result to the controller. If the water quality reaches the standard, the water will enter the disinfection tank through the water delivery pipe for disinfection treatment. If the water quality does not meet the standard, Then the controller controls the water pump to be turned on, and the water body enters the facultative pool again through the return pipe for treatment until the water quality reaches the standard.

Further, a disinfection box is provided in the disinfection pool, and the disinfection box is connected to a feeding box through a feeding pipe. The feeding box is located outside the disinfection pool, a heating plate is provided at the bottom of the disinfection box, and disinfection holes are uniformly provided on the side walls of the disinfection box. Various disinfectants in the feeding box enter the disinfection box through the feeding pipe, and the water body and the disinfectant are fully grounded through the disinfection hole to prevent large granular disinfectants from entering the disinfection box. The heating plate is set to heat the disinfectant , to speed up the dissolution rate of the disinfectant, save time, increase the reaction speed of the disinfectant and the water body, and improve the disinfection efficiency.

The utility model has the following beneficial effects due to the adoption of the above-mentioned technical scheme:

The filter screen on the filter plate removes the large particles of suspended matter and sundries in the sewage, and through physical action, the particles in the sewage settle, which protects the subsequent equipment and avoids clogging the equipment; the collection box is used for Collect the inorganic particles settled in the water to keep the first cavity clean and prevent secondary pollution; facultative microorganisms can adapt to wastewater with high COD concentration, and the COD concentration of influent can be increased to more than 2000mg/L; and aerobic microorganisms It can only be adapted to wastewater with low COD concentration. The COD concentration of influent water is generally controlled below 1000-1500mg/L. Therefore, facultative biochemical treatment and aerobic biochemical treatment are combined to make wastewater with high COD concentration enter facultative oxygen first. The tank reacts with facultative microorganisms, and then reacts with aerobic microorganisms in the aerobic tank. The setting is reasonable, which can reduce the volume of the biodegradation tank, and the treatment effect is better, which not only saves environmental protection investment but also reduces daily operating costs; setting The microbial filler provides growth space for microorganisms, and biofilm grows on the microbial filler, and the pollutants in the sewage are degraded by biofilm; Each water layer in the tank can be exposed to facultative microorganisms to expand the reaction area and improve the reaction efficiency; in the aerobic tank, the rotating shaft is connected to the drive motor through the flange in the spiral aerator, and rotates synchronously with the drive motor , realize the dual function of simultaneous aeration and stirring, and provide oxygen for the aerobic tank. At the same time, the lifting cylinder drives the screw aerator to move up and down, which can agitate, aerate and react various water layers, with a wide contact area and high reaction efficiency; Test the water quality after treatment with aerobic microorganisms to ensure that the water discharged from the clarification tank meets the standards, and the disinfection tank disinfects the water body to further improve the water quality.

The utility model performs multi-stage graded treatment on the sewage, better separates and degrades harmful substances in the sewage, prevents clogging, has high treatment efficiency and good effect, and makes the treated sewage meet the national discharge standard.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is the structural representation of a kind of aeration type sewage treatment device of the present utility model;

Fig. 2 is the structural representation of filtering device in the utility model;

Fig. 3 is the structural representation of aeration device in the utility model;

Fig. 4 is the schematic plan view of rotating disc in the utility model;

Fig. 5 is a schematic plan view of the support plate in the present invention.

Reference signs: 1, primary sedimentation tank; 11, baffle plate; 12, precipitant; 13, first cavity; 14, second cavity; 2, biodegradation tank; 21, facultative oxygen tank; 22, good Oxygen tank; 23, clarification tank; 24, vertical pipe; 25, biological tray; 26, water quality detector; 27, controller; 28, pump; 29, return pipe; 30, water pipe; 3, disinfection pool; 31, disinfection box; 32, feeding pipe; 33, feeding box; 34, heating plate; 35, disinfection hole; 4, filter device; 41, filter plate; 411, chute; 42, collection box; 43, filter hole; 44. filter screen; 45. cutting impeller; 46. weight detector; 47. cutting blade; 48. sewage pipe; 5. aeration device; 51. lifting cylinder; 52. spiral aerator; 53. rotating disc; 531, through hole; 54, rotating shaft; 55, aerobic microbial filler; 56, spiral blade; 57, roller; 58, support plate; 581, annular slideway; 6, cleaning device; 61, cleaning cylinder; 62, cleaning Motor; 63, cleaning drum; 64, connecting shaft; 65, soft bristles; 71, inflator; 72, main air intake pipe; 73, first air intake branch pipe; 74, second air intake branch pipe.

detailed description

As shown in Figure 1-5, it is an aeration type sewage treatment device of the present utility model, including primary sedimentation tank 1, biodegradation tank 2 and disinfection tank 3, primary sedimentation tank 1 is provided with filter device 4, filter device 4 includes a filter plate 41 and a collection box 42, the filter plate 41 is vertically arranged in the primary sedimentation tank 1, the filter plate 41 divides the primary sedimentation tank 1 into a first cavity 13 and a second cavity 14, and the filter plate 41 is provided with Filter holes 43, filter holes 43 are provided with a filter screen 44, the filter screen 44 on the filter plate 41 removes the suspended solids and sundries of large particles in the sewage, and makes the particles in the sewage settle by physical action. The device plays a protective role to avoid blocking the device. The collection box 42 is located at the bottom of the first chamber 13, and the collection box 42 provided is used to collect the inorganic particulates settled in the water to keep the cleanliness of the first chamber 13 and prevent secondary pollution; the bottom of the collection box 42 is provided with a cutting The impeller 45, the weight detector 46 and the valve, the cutting impeller 45 are provided with at least two layers of cutting blades 47, the weight detector 46 is connected with the valve, and the valve is provided with a sewage pipe 48. The cutting impeller 45 provided is used for cutting the impurities in the collection box 42, and the impurities with larger volume are cut into smaller impurities to avoid blocking the sewage pipe 48. The multi-layer cutting blade 47 provided improves the cutting efficiency. The weight detector 46 is used to detect the weight of the impurities collected by the collection box 42. When the weight of the impurities reaches the standard, the valve is opened to discharge the impurities through the sewage pipe 48, so as to prevent the collection box 42 from overflowing and keep the capacity of the collection box 42. A baffle 11 is also provided in the first cavity 13 , and the baffle 11 is located above the filter screen 44 . The meandering setting of the baffles 11 reduces the velocity of the water flow, reduces the impact of the water flow on the filter screen 44, avoids damage to the filter screen 44, and at the same time makes the sewage fully contact with the baffles 11, so that the precipitant 12 and the substances in the sewage Fully react, separate the pollution and harmful substances contained in the water body, make them form larger particles and settle in the collection box 42, or fail to pass through the filter screen 44 and remain in the first cavity 13.

Filter plate 41 is provided with cleaning device 6, and cleaning device 6 comprises cleaning cylinder 61, cleaning motor 62 and cleaning cylinder 63, and filter plate 41 is positioned at the top of filter screen 44 and is horizontally provided with chute 411, and cleaning cylinder 61 slides by slide block Connected on the chute 411, the lower side of the cleaning cylinder 61 is connected with the cleaning motor 62, and the output shaft of the cleaning motor 62 is connected with the cleaning roller 63 through the connecting shaft 64, and the cleaning roller 63 is evenly provided with soft bristles 65. During the process of sewage filtering through the filter screen 44, some flocs or viscous substances are easy to adhere to the filter screen 44, which will block the filter screen 44 holes and affect the drainage speed. The cleaning device 6 provided can adhere to the filter screen 44. The impurity that cleans up, keeps the permeability of filter screen 44, improves drainage efficiency, and the impurity that cleans up falls in collection box 42, deposits in collection box 42, avoids polluting primary sedimentation tank 1 again; Cylinder 61 drives cleaning motor 62 and cleaning cylinder 63 to move downwards until cleaning cylinder 63 faces filter screen 44, then starts cleaning motor 62, and cleaning motor 62 drives cleaning cylinder 63 to rotate through connecting shaft 64 to realize the brushing of filter screen 44. At the same time, the cleaning cylinder 61 moves left and right along the chute 411 under the drive of the driver, so that the cleaning cylinder 63 moves left and right on the filter screen 44, and the filter screen 44 is cleaned in all aspects, and the cleaning effect is good.

The biodegradation pool 2 includes an interconnected facultative pool 21, an aerobic pool 22 and a clarifier 23, and the facultative microorganisms can adapt to wastewater with a higher COD concentration, and the influent COD concentration can be increased to more than 2000 mg/L; while the aerobic microorganisms It can only be adapted to wastewater with low COD concentration. The COD concentration of influent water is generally controlled below 1000-1500mg/L. Therefore, facultative biochemical treatment and aerobic biochemical treatment are combined to make wastewater with high COD concentration enter facultative oxygen first. Pool 21 reacts with facultative microorganisms, and then reacts with aerobic microorganisms in aerobic pool 22. Reasonable setting can reduce the volume of biodegradation pools, and the treatment effect is better, which not only saves environmental protection investment but also reduces daily operating costs . The aerobic tank 21 is provided with a biological filler rack, and the biological filler rack includes a vertical pipe 24 and a biological disc 25, and the biological discs 25 are arranged on the vertical tube 24 up and down respectively, and a plurality of biological discs 25 are placed up and down in the aerobic tank 21. It is arranged on the vertical pipe 24, so that each water layer in the aerobic pool 21 can touch the aerobic microorganisms, expand the reaction area, and improve the reaction efficiency; the biological tray 25 is provided with an aerobic microbial filler, and the arranged microbial filler Provide growth space for microorganisms, grow biofilm on the microbial filler, and rely on biofilm to degrade pollutants in sewage.

Aerobic tank 22 is provided with aeration device 5, and aeration device 5 comprises lifting cylinder 51, screw aerator 52 and rotating disc 53, and screw aerator 52 is installed on the upper side of lifting cylinder 51, and screw aerator The rotating shaft 54 of 52 runs through the rotating disk 53 and is fixedly connected with the rotating disk 53, and the rotating disk 53 is provided with an aerobic microbial filler 55. In the aerobic tank 22, the rotating shaft 54 is connected to the drive motor through a flange in the spiral aerator 52, and rotates synchronously with the drive motor to realize the dual functions of simultaneous aeration and stirring, and provide oxygen for the aerobic tank 22, The spiral aerator 52 and the aerobic microbial filler 55 are integrated, and the distance is similar, which can provide oxygen for the aerobic microorganisms better and faster, and improve the treatment efficiency of the aerobic microorganisms. At the same time, the lifting cylinder 51 drives the spiral aeration The machine 52 moves up and down, which can stir, aerate and react various water layers, with wide contact area and high reaction efficiency. The center of rotating disc 53 is provided with through hole 531, and rotating disc 53 is connected with rotating shaft 54 by through hole 531, and rotating shaft 54 is a hollow shaft, is convenient to the circulation of air, and the upper side of rotating disc 53 is evenly distributed by circumference. Spiral blades 56, aerobic microbial fillers 55 are arranged between adjacent spiral blades 56, and the spiral blades 56 arranged on the rotating disk 53 make the rotating disk 53 rotate under the drive of the spiral aerator 52, the spiral blades 56 Agitate the water body, speed up the flow of the water body, make the aerobic microorganisms fully contact with the sewage, and react more efficiently. The lower side of the rotating disc 53 is provided with a roller 57, and the rotating shaft 54 is provided with a supporting disc 58 below the rotating disc 53. The supporting disc 58 is provided with an annular slideway 581, and the roller 57 is slidably connected to the annular slideway 581. . The set rotating disk 53 is slidably connected to the supporting disk 58 through the roller 57, which improves the rotation stability and installation firmness of the rotating disk 53, reduces the impact of the water flow on the rotating disk 53, and prolongs the working life.

In the second cavity 14, an inflator is provided, and the inflator includes an inflator 71, an air intake main pipe 72, a first air intake branch pipe 73 and a second air intake branch pipe 74, and one end of the air intake main pipe 72 is connected with the inflator 71, and The other end of the air main pipe 72 is connected with the first air intake branch pipe 73 and the second air intake branch pipe 74 respectively. In the oxygen pool 21. The inflator provided utilizes the inflator 71 to ventilate the intake main pipe 72, the first intake branch pipe 73 and the second intake branch pipe 74, and the inflation device backwashes the filter screen 44 through the first intake branch pipe 73 on the one hand, and further Impurities on the filter screen 44 are cleaned up to ensure the filtering effect. On the other hand, the second air intake branch pipe 74 aerates the aerobic tank 21 to provide oxygen for the aerobic microorganisms in the aerobic tank 21 to create a good aerobic environment. Improve the living environment of microorganisms, improve the survival rate of facultative microorganisms, and save energy.

The clarifier 23 is provided with a water quality detector 26, a controller 27, a water pump 28, a return pipe 29 and a water delivery pipe 30, and the controller 27 is connected with the water quality detector 26 and the water pump 28 respectively, and the return pipe 29 is connected with the water pump 28 and The aerobic pool 21 is connected. The set water quality detector 26 is used to detect the water in the clarifier 23, and the test result is sent to the controller 27. If the water quality reaches the standard, the water body is delivered to the disinfection tank 3 through the water delivery pipe 30 for disinfection. If the water quality does not meet the standard, the controller 27 controls the water pump 28 to turn on, and the water body is transported to the aerobic pool 21 again through the return pipe 29 for treatment until the water quality reaches the standard. Disinfection tank 3 is provided with disinfection tank 31, and disinfection tank 31 is connected with feeding box 33 by feeding pipe 32, and feeding tank 33 is positioned at the outside of disinfection tank 3, and the bottom of disinfection tank 31 is provided with heating plate 34, and the sidewall of disinfection tank 31 Evenly be provided with disinfection hole 35 on. The disinfection pool 3 disinfects the water body to further improve the water quality; various disinfectants in the feeding box 33 enter the disinfection tank 31 through the feeding pipe 32, and the water body and the disinfectant are fully grounded through the disinfection hole 35 to avoid disinfection of large particles The disinfectant enters the disinfection box 31, and the heating plate 34 provided heats the disinfectant to accelerate the dissolution rate of the disinfectant, save time, improve the reaction speed of the disinfectant and the water body, and improve the disinfection efficiency.

The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications based on the utility model to solve basically the same technical problems and achieve basically the same technical effects are covered by the protection scope of the utility model.

Claims (8)

1. a kind of aeration type sewage-treatment plant, including preliminary sedimentation tank, biodegradable pond and sterilization pool, it is characterised in that：It is described first Filter is provided with heavy pond, the filter includes filter and collecting box, and the filter is disposed longitudinally on described first In heavy pond, the preliminary sedimentation tank is separated into the first cavity and the second cavity by the filter, and the filter is provided with filter bores, The filter bores are provided with screen pack, and the collecting box is located at the bottom of first cavity, and the biodegradable pond includes phase Biologic packing material frame is provided with oxygen compatibility pool, Aerobic Pond and the depositing reservoir connected, the oxygen compatibility pool, the biologic packing material frame includes perpendicular Straight tube and biological disk, the biological disk are setting up and down in the VERTICAL TUBE respectively, and the biological disk is provided with facultative microbe Aerator is provided with filler, the Aerobic Pond, the aerator includes lift cylinder, spiral aerator and rotating circular disk, The spiral aerator is arranged on the upside of the lift cylinder, and the rotary shaft of the spiral aerator runs through the rotational circle Disk, and be fixedly connected with the rotating circular disk, the rotating circular disk is provided with aerobic microbiological filler.

2. a kind of aeration type sewage-treatment plant according to claim 1, it is characterised in that：Also set in first cavity There is deflection plate, the deflection plate is located at the top of the screen pack, and the deflection plate is in " Z " font, the surface of the deflection plate It is covered with precipitating reagent.

3. a kind of aeration type sewage-treatment plant according to claim 1, it is characterised in that：The filter is provided with clear Device is managed, the cleaning plant includes being located at the screen pack on cleaning cylinder, cleaning motor and rolling barrel, the filter Top be transversely provided with chute, the cleaning cylinder is slidably connected on the chute by sliding block, it is described cleaning cylinder under Side and the cleaning motor connection, the output shaft of the cleaning motor are connected by connecting shaft with the rolling barrel, described clear Brush with soft is uniformly provided with reason roller.

4. a kind of aeration type sewage-treatment plant according to claim 1, it is characterised in that：It is provided with second cavity Aerating device, the aerating device includes inflator, inlet manifold, the first air intake branch and the second air intake branch, the air inlet One end of house steward is connected with the inflator, the other end of the inlet manifold with respectively with first air intake branch and second Air intake branch is connected, and the mouth of pipe of first air intake branch is just to the screen pack, and the mouth of pipe of second air intake branch is located at In the oxygen compatibility pool.

5. a kind of aeration type sewage-treatment plant according to claim 1, it is characterised in that：The bottom of the collecting box is set There are cutting impeller, weight tester and valve, the cutting impeller is provided with least two layers cutting blade, the weight tester It is connected with the valve, blow-off pipe is provided with the valve.

6. a kind of aeration type sewage-treatment plant according to claim 1, it is characterised in that：The center of the rotating circular disk Provided with through hole, the rotating circular disk is connected by the through hole with the rotary shaft, and the rotary shaft is quill shaft, the rotation The upside of disk is circumferentially evenly distributed with helical blade, the aerobic microbiological filler be arranged on the adjacent helical blade it Between, the downside of the rotating circular disk is provided with the lower section for being located at the rotating circular disk in roller, the rotary shaft provided with support plate, institute Support plate is stated provided with annular slide track, the roller-coaster is connected on the annular slide track.

7. a kind of aeration type sewage-treatment plant according to claim 1, it is characterised in that：Water is provided with the depositing reservoir Quality detection instrument, controller, suction pump, return duct and water-supply-pipe, the controller respectively with the water quality testing meter, described draw water Pump is connected, and the return duct is connected by the suction pump with the oxygen compatibility pool.

8. a kind of aeration type sewage-treatment plant according to claim 1, it is characterised in that：It is provided with and disappears in the sterilization pool Malicious case, the disinfect box is connected with feeding tank by commissioning pipe, and the feeding tank is located at the outside of the sterilization pool, the sterilization The bottom of case, which is provided with heating plate, the side wall of the disinfect box, is uniformly provided with sterilization hole.