CN110713315A - Special sewage treatment device for sewage plant in villages and towns and treatment method thereof - Google Patents

Special sewage treatment device for sewage plant in villages and towns and treatment method thereof Download PDF

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Publication number
CN110713315A
CN110713315A CN201910989717.6A CN201910989717A CN110713315A CN 110713315 A CN110713315 A CN 110713315A CN 201910989717 A CN201910989717 A CN 201910989717A CN 110713315 A CN110713315 A CN 110713315A
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CN
China
Prior art keywords
tank
sewage
pipeline
water
sludge
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Application number
CN201910989717.6A
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Chinese (zh)
Inventor
郑业斌
李鹏
王威
杨胜灯
易亚杰
王忠洋
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Hunan Zhongji Environmental Investment Co Ltd
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Hunan Zhongji Environmental Investment Co Ltd
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Priority to CN201910989717.6A priority Critical patent/CN110713315A/en
Publication of CN110713315A publication Critical patent/CN110713315A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultra-violet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment

Abstract

The invention discloses a special sewage treatment device for a sewage plant in villages and towns and a treatment method thereof, wherein the special sewage treatment device comprises an anoxic tank, an anaerobic tank, an aerobic tank, a vertical inclined tube secondary sedimentation tank, a biological filter, a clean water tank and an electric control room; the oxygen-poor tank, the anaerobic tank, the aerobic tank, the vertical inclined tube secondary sedimentation tank, the biological filter, the clean water tank and the electric control room are sequentially and parallelly integrated in a container type structural design from left to right, and a regulating tank and a sludge tank are arranged on the common front side of the oxygen-poor tank, the anaerobic tank, the aerobic tank and the vertical inclined tube secondary sedimentation tank; the adjusting tank is arranged on the left side of the sludge tank, the adjusting tank is communicated with the anoxic tank through a water inlet pipe, and a submersible sewage pump is arranged on the water inlet pipe; the integral structure of the whole device disclosed by the invention adopts a centralized container type structural design, so that the integral structure is more compact, the requirement on the occupied area is lower, the device is suitable for large-scale popularization in rural areas, a complete sewage treatment system is constructed in wide rural areas, and disordered discharge of sewage can be effectively restrained.

Description

Special sewage treatment device for sewage plant in villages and towns and treatment method thereof
Technical Field
The invention relates to the technical field of sewage treatment equipment, in particular to a special sewage treatment device for a sewage plant in villages and towns and a treatment method thereof.
Background
The domestic sewage of villages and towns is one of the main sources of environmental pollution in rural areas, and is closely related to ecological civilization construction and beautiful rural construction. In the quality of the domestic sewage of the villages and towns, treatment engineering designers need to master the characteristics of the domestic sewage of the villages and towns, ensure the targeted design of treatment engineering, practically treat the domestic sewage of the villages and towns and improve the ecological environment of the villages.
Specifically, the characteristics of the domestic sewage of the villages and towns are as follows: firstly, the discharge points are dispersed, the living places of peasants in villages are dispersed, so that the discharge points of domestic sewage in villages and towns are dispersed, and the difficulty of domestic sewage collection is increased because a complete domestic sewage treatment system is not constructed in most villages; secondly, the domestic sewage is wide in source, the domestic water mainly comprises kitchen water and sanitary water, some people in villages and towns can feed poultry or livestock, the water for the poultry and the livestock is brought into the scope of the domestic water in the villages and the towns, and the treatment difficulty of the domestic water in the villages and the towns is increased; thirdly, with the development of economic society and the acceleration of urbanization process, the sewage treatment plants in villages and towns basically realize full coverage, the sewage collection rate is also improved year by year, and the sewage is effectively treated to a great extent. However, in the actual operation process of some sewage treatment plants in villages and towns, the normal operation of the sewage treatment plants is influenced due to low inlet water concentration, the investment waste of the sewage treatment plants is also caused, and the expected emission reduction benefit is not achieved; fourthly, although the basic government departments of China introduce advanced technologies such as artificial wetland, biological treatment and the like in the treatment of domestic water in villages and towns, the design of the domestic sewage treatment project in villages and towns has certain defects and needs to be optimized under the influence of the factors.
Therefore, the invention provides a special sewage treatment device for a sewage plant in villages and towns and a treatment method thereof, which can well solve the problems.
Disclosure of Invention
The invention aims to provide a special sewage treatment device for a sewage plant in villages and towns and a treatment method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a sewage treatment device special for sewage plants in villages and towns comprises an anoxic tank, an anaerobic tank, an aerobic tank, a vertical inclined tube secondary sedimentation tank, a biological filter, a clean water tank and an electric control room; the container type structure design is that the anoxic tank, the anaerobic tank, the aerobic tank, the vertical inclined tube secondary sedimentation tank, the biological filter, the clean water tank and the electric control room are sequentially concentrated side by side from left to right, and the elevation of the bottom plate of the integral box body is positive or negative; the common front of the anoxic tank, the anaerobic tank, the aerobic tank and the vertical inclined tube secondary sedimentation tank is provided with a regulating tank and a sludge tank; the adjusting tank is arranged on the left side of the sludge tank, the adjusting tank is connected with the anoxic tank through a water inlet pipe in a penetrating manner, the water inlet pipe is provided with a submersible sewage pump, the sludge tank is connected with the vertical flow type inclined tube secondary sedimentation tank through a sludge pipe in a penetrating manner, the sludge pipe is provided with a first electromagnetic valve, the anoxic tank is connected with the anaerobic tank through a first overflowing hole in a penetrating manner, the anaerobic tank is connected with the aerobic tank through a second overflowing hole in a penetrating manner, one side of the inner cavity of the aerobic tank, which is far away from the anaerobic tank, is fixedly provided with a weir dam groove, the weir dam groove is connected with the vertical flow type inclined tube secondary sedimentation tank through a first pipeline in a penetrating manner, the second overflowing hole and the weir groove are both provided with isolating mesh screens, the aerobic tank is filled with suspended fillers, the suspended fillers are hydrophilic base sponge bodies with the size of 1cm multiplied by 1cm, the aerobic tank is internally, the fan is arranged in a fan installation room, the fan installation room is arranged in a vertical inclined tube secondary sedimentation tank, the fan installation room is a box body which is welded by steel plates and provided with a ventilation grating and a waterproof cover plate, the vertical inclined tube secondary sedimentation tank is communicated and connected with a biological filter through a third flow hole, the biological filter is communicated and connected with a clean water tank through a fourth flow hole, a pipeline type ultraviolet sterilizer is arranged in an electric control room, the clean water tank is communicated and connected with the water inlet end of the pipeline type ultraviolet sterilizer through a second pipeline, the water outlet end of the pipeline type ultraviolet sterilizer is communicated and connected with a metering tank through a third pipeline, a Pasteur metering tank is arranged in the metering tank, an ultrasonic flowmeter is arranged in the Pasteur metering tank, the water outlet end of the metering tank is communicated and connected with a fourth pipeline, and a rotary mechanical grating is arranged on one side of an inner cavity of, sewage enters the anoxic tank through the water inlet pipe under the action of the submersible sewage pump, enters the anaerobic tank through the first overflowing hole after being subjected to primary treatment in the anoxic tank, is treated in the anaerobic tank, directly enters the aerobic tank through the second overflowing hole after being treated, is subjected to aeration treatment in the aerobic tank, enters the vertical flow inclined tube secondary sedimentation tank through the first pipeline after being treated, is precipitated to remove solid particle impurities in the sewage, enters the sludge tank through the sludge pipe to be subjected to centralized treatment on the solid impurities, enters the biological filter tank through the third overflowing hole at the same time for biological treatment, further improves the water quality, completely treated clean water enters the clean water tank through the fourth overflowing hole, enters the pipeline type ultraviolet sterilizer through the second pipeline, performs ultraviolet sterilization and disinfection, the disinfected water enters the metering tank through a third pipeline and is finally discharged through a fourth pipeline; the integral structure of the whole device adopts a centralized container type structural design, so that the integral structure is more compact, the requirement on the occupied area is lower, the device is suitable for large-scale popularization in rural areas, a complete sewage treatment system is constructed in vast rural areas, and disordered discharge of sewage can be effectively restrained; and the sewage treatment process of the whole device can carry out deep treatment on the sewage, thereby ensuring the sewage treatment quality and effectively preventing the discharge of substandard water.
In further embodiment, the oxygen deficiency pond is through nitrifying liquid return line through connection aerobic tank, and the oxygen deficiency pond passes through mud return line through connection vertical flow type pipe chute secondary sedimentation pond, nitrify and install the air stripping pump on liquid return line and the mud return line respectively, nitrify and install the fourth solenoid valve on the liquid return line, install the fifth solenoid valve on the mud return line, the mud that deposits in the vertical flow type pipe chute secondary sedimentation pond passes through mud return line and gets into in the oxygen deficiency pond, and the liquid that nitrifies in the aerobic tank gets into in the oxygen deficiency pond through nitrifying liquid return line to can be better get rid of the phosphorus in the aquatic, reduce the phosphorus content in the sewage by a wide margin, improve quality of water.
In a further embodiment, a plurality of inclined pipes are uniformly arranged in the middle of an inner cavity of the vertical inclined pipe secondary sedimentation tank, all the inclined pipes are arranged in parallel in an inclined mode, the water outlet end of the first pipeline is suspended below the inclined pipes, a steel plate sludge hopper matched with the sludge pipes is installed on the bottom wall of the inner cavity of the vertical inclined pipe secondary sedimentation tank, solid impurities precipitated in the vertical inclined pipe secondary sedimentation tank flow to the sludge pipes under the action of the steel plate sludge hopper, and are discharged out of the sludge tank through the sludge pipes finally, the solid impurities and sludge precipitated in the vertical inclined pipe secondary sedimentation tank are subjected to centralized treatment, and convenience in management of the whole device is improved.
In a further embodiment, a denitrification filler is installed in the biological filter, the biological filter is in through connection with a clean water tank through a backwashing pipeline, the water outlet end of the backwashing pipeline is arranged below the denitrification filler, the water inlet end of the backwashing pipeline is in through connection with an air stripping pump fixedly installed in the clean water tank, a sixth electromagnetic valve is installed on the backwashing pipeline, the biological filter is in through connection with an adjusting tank through a backwashing drain pipe, the water inlet end of the backwashing drain pipe is arranged 10cm above the denitrification filler, a second electromagnetic valve is installed on the backwashing drain pipe, the air stripping pump is used for extracting clean water in the clean water tank, an air-water mixture is sprayed out through the backwashing pipeline, the denitrification filler is washed, the denitrification filler can be effectively prevented from being blocked, and the working effect of the denitrification filler is ensured; and simultaneously, the sewage for washing the denitrification filler is discharged into the regulating tank through the backwashing water discharge pipe for secondary treatment.
In a further embodiment, install the PLC switch board in the automatically controlled room, the PLC switch board is connected with stealthily dirty pump, rotation mechanical grid, first solenoid valve, second solenoid valve, fourth solenoid valve, fifth solenoid valve, sixth solenoid valve, fan and pipeline formula ultraviolet sterilizer respectively, carries out centralized control respectively to stealthily dirty pump, rotation mechanical grid, first solenoid valve, second solenoid valve, fourth solenoid valve, fifth solenoid valve, sixth solenoid valve, fan and pipeline formula ultraviolet sterilizer through the PLC switch board to promote the convenience of whole device operation by a wide margin, reduce the operation degree of difficulty, be convenient for use widely in rural area.
In a further embodiment, the air lift pump comprises an air inlet chamber, the inlet end of the air inlet chamber is respectively communicated with a water-absorbing bell mouth and an air pipe, the outlet end of the air inlet chamber is communicated with a water outlet pipe, the air pipe is communicated with a fan, a third electromagnetic valve is mounted on the air pipe and connected with a PLC (programmable logic controller), water from the water-absorbing bell mouth and air from the air pipe are mixed in the air inlet chamber and are discharged through the water outlet pipe, and the operation mode not only can provide good air-water impact force, but also can effectively prevent pipeline blockage by utilizing flushing and air-water mixing energy, and can convey high-density liquid by utilizing the air-water mixing energy; and in the rural sewage project with the water amount less than 500 cubic meters per day, the gas lift pump has very obvious energy-saving advantages, is suitable for low-water-content sewage treatment, and meets the requirements of scattered distribution of rural sewage and small amount.
A treatment method of a special sewage treatment device for a sewage plant in villages and towns comprises the following steps:
s1) denitrogenation treatment: firstly, sewage in an adjusting tank is pumped by a sewage submersible pump and is injected into an anoxic tank by a water inlet pipe; simultaneously, return sludge from a sludge return pipeline and nitrifying liquid from a nitrifying liquid return pipe return to the anoxic tank, under the action of microorganisms, an organic carbon source is used as an electron donor, and sewage from a water inlet pipe, the returned nitrifying liquid and NOx in the sludge-1The nitrogen is reduced to be separated from the water body and enter the air, so that the water body is purified;
s2) phosphorus release treatment: the sewage treated in the anoxic tank enters the anaerobic tank through the first overflowing hole, and phosphorus is released under the action of microorganisms in the anaerobic tank;
s3) phosphorus reduction and aeration treatment: the sewage treated in the anaerobic tank enters the aerobic tank through the second overflowing hole, then is aerated through the tubular aerator, and meanwhile, the suspended filler in the aerobic tank provides conditions for microorganism attachment, so that the biomass and the impact load resistance of the aerobic tank are improved; the aerobic tank is internally provided with a plurality of microorganism systems of different types, such as a suspension aerobic type, an attached facultative type, an attached anoxic type and an attached anaerobic type, so that the aerobic tank can complete the functions of removing organic matters, nitrogen and phosphorus from the sewage;
s4) precipitation treatment: the sewage treated in the aerobic tank enters a vertical flow type inclined tube secondary sedimentation tank through a first pipeline, and the sedimentation of solid particle impurities is completed in the vertical flow type inclined tube secondary sedimentation tank;
s5) biological filter treatment: the sewage precipitated in the vertical inclined tube secondary sedimentation tank enters the biological filter tank through the third through-flow hole and is filtered under the action of the denitrification filler, so that the contents of SS, total nitrogen and total phosphorus in the effluent can be effectively reduced, and the water quality is further improved; wherein, the denitrification filler adopts ceramsite with the diameter of 1cm as the filler;
s6) disinfection treatment: after the filtered clean water in the biological filter tank enters a clean water tank, the clean water is injected into the pipeline type ultraviolet sterilizer for ultraviolet irradiation disinfection and sterilization under the action of the second pipeline, the content of most viruses and bacteria in the tail water is reduced, and the sewage treatment can be finished.
Compared with the prior art, the invention has the beneficial effects that:
1. the integral structure of the whole device disclosed by the invention adopts a centralized container type structural design, so that the integral structure is more compact, the requirement on the occupied area is lower, the device is suitable for large-scale popularization in rural areas, a complete sewage treatment system is constructed in wide rural areas, and disordered discharge of sewage can be effectively restrained; the sewage treatment process of the whole device can carry out deep treatment on the sewage, thereby ensuring the sewage treatment quality and effectively preventing the discharge of substandard water;
2. according to the invention, the anoxic tank is communicated with the vertical flow type inclined tube secondary sedimentation tank through the sludge return pipeline, the nitrification liquid return pipeline and the sludge return pipeline are respectively provided with the air stripping pump, sludge precipitated in the vertical flow type inclined tube secondary sedimentation tank enters the anoxic tank through the sludge return pipeline, and the nitrification liquid in the aerobic tank enters the anoxic tank through the nitrification liquid return pipeline, so that phosphorus in water can be better removed, the phosphorus content in sewage is greatly reduced, and the water quality is improved;
3. according to the invention, solid impurities precipitated in the vertical inclined tube secondary sedimentation tank flow to the sludge pipe under the action of the steel plate sludge bucket, and are finally discharged out of the sludge tank through the sludge pipe, so that the solid impurity sludge precipitated in the vertical inclined tube secondary sedimentation tank is subjected to centralized treatment, and the convenience of the management of the whole device is improved;
4. according to the invention, the air stripping pump is used for pumping clean water in the clean water tank, and the air-water mixture is sprayed out through the backwashing pipeline to flush the denitrification filler, so that the blockage of the denitrification filler can be effectively prevented, and the working effect of the denitrification filler is ensured; and simultaneously, the sewage for washing the denitrification filler is discharged into the regulating tank through the backwashing water discharge pipe for secondary treatment.
Drawings
FIG. 1 is a schematic view showing a sewage treatment apparatus for sewage treatment plants in villages and towns;
FIG. 2 is a schematic top view of a sewage treatment apparatus dedicated for sewage treatment plants in villages and towns;
FIG. 3 is a schematic view of an air lift pump of a sewage treatment plant dedicated for sewage plants in villages and towns;
FIG. 4 is a schematic view showing a flow chart of a treatment method of a sewage treatment apparatus dedicated for sewage plants in villages and towns.
In the figure: 1-anoxic tank, 2-anaerobic tank, 3-aerobic tank, 301-tubular aerator, 302-suspended filler, 303-weir dam tank, 4-vertical inclined tube secondary sedimentation tank, 401-steel plate sludge bucket, 402-inclined tube, 403-first electromagnetic valve, 404-sludge tube, 405-sludge tank, 5-biofilter, 501-denitrification filler, 502-backwashing pipeline, 503-second electromagnetic valve, 504-backwashing drain pipe, 6-clear water tank, 7-metering tank, 701-pasteurization metering tank, 8-blower, 801-blower installation room, 9-air stripping pump, 91-third electromagnetic valve, 92-air tube, 93-water outlet tube, 94-air inlet chamber, 95-water suction horn mouth, 96-fourth electromagnetic valve, 97-a fifth electromagnetic valve, 98-a sixth electromagnetic valve, 10-an electronic control room, 101-a regulating tank, 102-a submersible sewage pump, 103-a rotary mechanical grid, 104-a sludge return pipeline, 105-a nitrifying liquid return pipeline, 1001-a PLC control cabinet, 1002-a pipeline type ultraviolet sterilizer, 901-a water inlet pipe, 902-a first overflowing hole, 903-a second overflowing hole, 904-a first pipeline, 905-a third overflowing hole, 907-a fourth overflowing hole, 908-a second pipeline, 909-a third pipeline and 9010-a fourth pipeline.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, a special sewage treatment device for sewage plants in villages and towns comprises an anoxic tank 1, an anaerobic tank 2, an aerobic tank 3, a vertical inclined tube secondary sedimentation tank 4, a biological filter 5, a clean water tank 6 and an electric control room 10; the oxygen-poor tank 1, the anaerobic tank 2, the aerobic tank 3, the vertical inclined tube secondary sedimentation tank 4, the biological filter 5, the clean water tank 6 and the electric control room 10 are sequentially and parallelly centralized in a container type structural design from left to right, and the elevation of the bottom plate of the whole box body is positive or negative; the common front of the anoxic tank 1, the anaerobic tank 2, the aerobic tank 3 and the vertical inclined tube secondary sedimentation tank 4 is provided with a regulating tank 101 and a sludge tank 405; the adjusting tank 101 is arranged on the left side of a sludge tank 405, the adjusting tank 101 is in through connection with an anoxic tank 1 through a water inlet pipe 901, a submersible sewage pump 102 is installed on the water inlet pipe 901, the sludge tank 405 is in through connection with a vertical flow type inclined pipe secondary sedimentation tank 4 through a sludge pipe 404, a first electromagnetic valve 403 is installed on the sludge pipe 404, the anoxic tank 1 is in through connection with an anaerobic tank 2 through a first through hole 902, the anaerobic tank 2 is in through connection with an aerobic tank 3 through a second through hole 903, one side of an inner cavity of the aerobic tank 3, which is far away from the anaerobic tank 2, is fixedly provided with a weir dam groove 303, the weir dam groove 303 is in through connection with the vertical flow type inclined pipe secondary sedimentation tank 4 through a first pipeline 904, isolation mesh screens are installed in the second through hole 903 and the weir dam groove 303, a suspension filler 302 is filled in the aerobic tank 3, the suspension filler 302 is a hydrophilic group sponge body of 1cm x 1, a plurality of tubular aerators 301 are arranged in the aerobic tank 3, the air inlet ends of the tubular aerators 301 are communicated with a fan 8 through a pipeline, the fan 8 is arranged in a fan installation room 801, the fan installation room 801 is arranged in a vertical inclined tube secondary sedimentation tank 4, the fan installation room 801 is a box body which is welded by steel plates and is provided with a ventilation grating and a waterproof cover plate, the vertical inclined tube secondary sedimentation tank 4 is communicated with a biological filter 5 through a third through-flow hole 905, the biological filter 5 is communicated with a clear water tank 6 through a fourth through-flow hole 907, a pipeline type ultraviolet sterilizer 1002 is arranged in the electric control room 10, the clear water tank 6 is communicated with the water inlet end of the pipeline type ultraviolet sterilizer 1002 through a second pipeline 908, the water outlet end of the pipeline type ultraviolet sterilizer 1002 is communicated with a metering tank 7 through a third pipeline 909, and a pasteurization tank 701 is arranged in the metering tank 7, an ultrasonic flowmeter is installed in the pasteurization measuring tank 701, the water outlet end of the measuring tank 7 is in through connection with a fourth pipeline 9010, a rotary mechanical grating 103 is installed on one side of the inner cavity of the adjusting tank 101, sewage enters the anoxic tank 1 through a water inlet pipe 901 under the action of the submersible sewage pump 102, enters the anaerobic tank 2 through a first overflowing hole 902 after being subjected to primary treatment in the anoxic tank 1 and is treated in the anaerobic tank 2, directly enters the aerobic tank 3 through a second overflowing hole 903 after being treated, is subjected to aeration treatment in the aerobic tank 3, enters the vertical inclined tube secondary sedimentation tank 4 through a first pipeline 904 for sedimentation after being treated, solid particle impurities in the sewage are removed, the precipitated solid impurities enter the sludge tank 405 through a sludge pipe 404, the solid impurities are treated in a centralized manner, and meanwhile, the precipitated water enters the biological filter 5 through a third overflowing hole 905, biological treatment is carried out to further improve the water quality, the completely treated clean water enters the clean water tank 6 through the fourth through hole 907, the clean water in the clean water tank 6 enters the pipeline type ultraviolet sterilizer 1002 through the second pipeline 908, ultraviolet sterilization and disinfection are carried out, the disinfected water enters the metering tank 7 through the third pipeline 909 and is finally discharged through the fourth pipeline 9010; the integral structure of the whole device adopts a centralized container type structural design, so that the integral structure is more compact, the requirement on the occupied area is lower, the device is suitable for large-scale popularization in rural areas, a complete sewage treatment system is constructed in vast rural areas, and disordered discharge of sewage can be effectively restrained; and the sewage treatment process of the whole device can carry out deep treatment on the sewage, thereby ensuring the sewage treatment quality and effectively preventing the discharge of substandard water.
Example 2
The difference from example 1 is: the oxygen deficiency pond 1 is through nitrifying liquid return line 105 through-connection aerobic tank, and oxygen deficiency pond 1 is through mud return line 104 through-connection vertical flow type pipe chute secondary sedimentation tank 4, nitrify and install air lift pump 9 on liquid return line 105 and the mud return line 104 respectively, nitrify and install fourth solenoid valve 96 on the liquid return line 105, install fifth solenoid valve 97 on the mud return line 104, the mud that deposits in the vertical flow type pipe chute secondary sedimentation tank 4 passes through mud return line 104 and gets into in oxygen deficiency pond 1, and the liquid of nitrifying in the aerobic tank 3 gets into in oxygen deficiency pond 1 through nitrifying liquid return line 105 to the phosphorus of aquatic of getting rid of that can be better reduces the phosphorus content in the sewage by a wide margin, improves quality of water.
Example 3
The difference from example 1 is: the middle part of the inner cavity of the vertical inclined tube secondary sedimentation tank 4 is uniformly provided with a plurality of inclined tubes 402, all the inclined tubes 402 are arranged in parallel in an inclined manner, the water outlet end of the first pipeline 904 is suspended below the inclined tubes 402, the bottom wall of the inner cavity of the vertical inclined tube secondary sedimentation tank 4 is provided with a steel plate sludge hopper 401 matched with the sludge pipe 404, solid impurities precipitated in the vertical inclined tube secondary sedimentation tank 4 flow to the sludge pipe 404 under the action of the steel plate sludge hopper 401, and are discharged out of the sludge tank 405 through the sludge pipe 404, so that the solid impurity sludge precipitated in the vertical inclined tube secondary sedimentation tank 4 is treated in a centralized manner, and the convenience of management of the whole device is improved.
Example 4
Referring to fig. 1-3, the difference from example 1 is: a denitrification filler 501 is arranged in the biological filter 5, the biological filter 5 is communicated with a clean water tank 6 through a backwashing pipeline 502, the water outlet end of the backwashing pipeline 502 is arranged below the denitrification filler 501, the water inlet end of the backwashing pipeline 502 is communicated with an air stripping pump 9 fixedly arranged in the clean water tank 6, a sixth electromagnetic valve 98 is arranged on the backwashing pipeline 502, the biological filter 5 is communicated with an adjusting tank 101 through a backwashing drain pipe 504, the water inlet end of the backwashing drain pipe 504 is arranged 10cm above the denitrification filler 501, a second electromagnetic valve 503 is arranged on the backwashing drain pipe 504, clean water in the clean water tank 6 is extracted through the air stripping pump 9, an air-water mixture is sprayed out through the backwashing pipeline 502 to flush the denitrification filler 501, the denitrification filler 501 can be effectively blocked, and the working effect of the denitrification filler 501 is ensured; meanwhile, sewage for flushing the denitrification filler 501 is discharged into the regulating reservoir 101 through the backwashing water discharge pipe 504 for secondary treatment.
A PLC control cabinet 1001 is installed in the electric control room 10, the PLC control cabinet 1001 is respectively connected with the submersible sewage pump 102, the rotary mechanical grid 103, the first electromagnetic valve 403, the second electromagnetic valve 503, the fourth electromagnetic valve 96, the fifth electromagnetic valve 97, the sixth electromagnetic valve 98, the fan 8 and the pipeline type ultraviolet sterilizer 1002, and the submersible sewage pump 102, the rotary mechanical grid 103, the first electromagnetic valve 403, the second electromagnetic valve 503, the fourth electromagnetic valve 96, the fifth electromagnetic valve 97, the sixth electromagnetic valve 98, the fan 8 and the pipeline type ultraviolet sterilizer 1002 are respectively and centrally controlled through the PLC control cabinet 1010, so that the convenience of the operation of the whole device is greatly improved, the operation difficulty is reduced, and the device is convenient to popularize and use in rural areas.
The air lift pump 9 comprises an air inlet chamber 94, the inlet end of the air inlet chamber 94 is respectively connected with a water suction bell mouth 95 and an air pipe 92 in a penetrating manner, the outlet end of the air inlet chamber 94 is connected with a water outlet pipe 93 in a penetrating manner, the air pipe 92 is connected with a fan 8 in a penetrating manner, a third electromagnetic valve 91 is installed on the air pipe 92, the third electromagnetic valve 91 is connected with a PLC (programmable logic controller) control cabinet 1001, water from the water suction bell mouth 95 and air from the air pipe 92 are mixed in the air inlet chamber 94 and are discharged through the water outlet pipe 93, the operation mode can provide good air-water impact force, flushing is utilized, the air-water mixing energy is utilized to effectively prevent pipeline blockage, and high; and in the rural sewage project with the water amount less than 500 cubic meters per day, the air lift pump 9 has very obvious energy-saving advantages, is suitable for low-water-content sewage treatment, and meets the requirements of scattered distribution of rural sewage and small amount.
Referring to fig. 4, the method for treating the sewage treatment apparatus dedicated for sewage plants in villages and towns disclosed in the above embodiments 1-4 comprises the following steps:
s1) denitrogenation treatment: firstly, sewage in a regulating tank 101 is pumped by a sewage submersible pump 102 and is injected into an anoxic tank 1 by a water inlet pipe 901; meanwhile, return sludge from the sludge return pipe and nitrified liquid from the nitrified liquid return pipe return to the anoxic tank 1, and under the action of microorganisms, the organic carbon source is used as an electron donor, and sewage from the water inlet pipe 901 and the returned nitrified liquidNOx in sludge-1The nitrogen is reduced to be separated from the water body and enter the air, so that the water body is purified;
s2) phosphorus release treatment: the sewage treated in the anoxic tank 1 enters the anaerobic tank 2 through the first through hole 902, and phosphorus is released under the action of microorganisms in the anaerobic tank 2;
s3) phosphorus reduction and aeration treatment: the sewage treated in the anaerobic tank 2 enters the aerobic tank 3 through the second through hole 903, then is aerated through the tubular aerator 301, and meanwhile, the suspended filler 302 in the aerobic tank 3 provides conditions for microorganism attachment, so that the biomass and the impact load resistance of the aerobic tank 3 are improved; the aerobic tank is internally provided with a plurality of microorganism systems of different types, such as a suspension aerobic type, an attached facultative type, an attached anoxic type and an attached anaerobic type, so that the aerobic tank 3 can complete the functions of removing organic matters, nitrogen and phosphorus from the sewage;
s4) precipitation treatment: the sewage treated in the aerobic tank 3 enters a vertical inclined tube secondary sedimentation tank 4 through a first pipeline 904, and the sedimentation of solid particle impurities is completed in the vertical inclined tube secondary sedimentation tank 4;
s5) biological filter treatment: the sewage precipitated in the vertical inclined tube secondary sedimentation tank 4 enters the biological filter 5 through the third through hole 905 and is filtered under the action of the denitrification filler 501, so that the contents of SS, total nitrogen and total phosphorus in the effluent can be effectively reduced, and the water quality is further improved; wherein, the denitrification filler 501 selects ceramsite with the diameter of 1cm as the filler;
s6) disinfection treatment: after entering the clean water tank 6, the clean water filtered in the biological filter 5 is injected into the pipeline type ultraviolet sterilizer 1002 under the action of the second pipeline 908 for ultraviolet irradiation disinfection and sterilization, so that the content of most viruses and bacteria in the tail water is reduced, and the sewage treatment can be completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A sewage treatment device special for sewage plants in villages and towns comprises an anoxic tank (1), an anaerobic tank (2), an aerobic tank (3), a vertical flow type inclined tube secondary sedimentation tank (4), a biological filter (5), a clean water tank (6) and an electric control room (10), and is characterized in that the anoxic tank (1), the anaerobic tank (2), the aerobic tank (3), the vertical flow type inclined tube secondary sedimentation tank (4), the biological filter (5), the clean water tank (6) and the electric control room (10) are sequentially and side by side from left to right in a container type structural design, and the elevation of a bottom plate of an integral box body is positive or negative; the common front of the anoxic tank (1), the anaerobic tank (2), the aerobic tank (3) and the vertical inclined tube secondary sedimentation tank (4) is provided with a regulating tank (101) and a sludge tank (405); the adjusting tank (101) is arranged on the left side of the sludge tank (405), the adjusting tank (101) is communicated with the anoxic tank (1) through a water inlet pipe (901), and the water inlet pipe (901) is provided with a submersible sewage pump (102);
the sludge tank (405) is connected with a vertical inclined tube secondary sedimentation tank (4) through a sludge tube (404), a first electromagnetic valve (403) is installed on the sludge tube (404), the anoxic tank (1) is connected with an anaerobic tank (2) through a first flow passing hole (902), the anaerobic tank (2) is connected with an aerobic tank (3) through a second flow passing hole (903), one side, far away from the anaerobic tank (2), of an inner cavity of the aerobic tank (3) is fixedly provided with a weir dam groove (303), the weir dam groove (303) is connected with the vertical inclined tube secondary sedimentation tank (4) through a first pipeline (904), isolation mesh screens are installed in the second flow passing hole (903) and the weir dam groove (303), a suspension filler (302) is filled in the aerobic tank (3), a plurality of tube aerators (301) are installed in the aerobic tank (3), and the air inlet end of the tube aerators (301) is connected with a fan (8) through a pipeline, the fan (8) is arranged in a fan installation room (801), the fan installation room (801) is arranged in the vertical inclined tube secondary sedimentation tank (4), the fan installation room (801) is a box body welded by steel plates and provided with a ventilation grating and a waterproof cover plate, the vertical inclined tube secondary sedimentation tank (4) is communicated with the biological filter (5) through a third through hole (905), and the biological filter (5) is communicated with the clean water tank (6) through a fourth through hole (907);
install pipeline formula ultraviolet sterilizer (1002) in automatically controlled room (10), clean water basin (6) are through-connected the end of intaking in pipeline formula ultraviolet sterilizer (1002) through second pipeline (908), the play water end of pipeline formula ultraviolet sterilizer (1002) is through-connected metering tank (7) through third pipeline (909), install pasteur metering tank (701) in metering tank (7), install ultrasonic flowmeter in pasteur metering tank (701), the play water end through-connection fourth pipeline (9010) of metering tank (7), rotation mechanical grid (103) are installed to inner chamber one side of equalizing basin (101).
2. The sewage treatment plant for sewage treatment plants in villages and towns of claim 1, wherein said suspended filler (302) is a hydrophilic sponge body selected from 1cm x 1 cm.
3. The special sewage treatment device for the sewage plant in the villages and the towns as claimed in claim 1, wherein the anoxic tank (1) is connected with the aerobic tank (3) through a nitrifying liquid return pipeline (105), the anoxic tank (1) is connected with the vertical inclined tube secondary sedimentation tank (4) through a sludge return pipeline (104), the nitrifying liquid return pipeline (105) and the sludge return pipeline (104) are respectively provided with an air lift pump (9), the nitrifying liquid return pipeline (105) is provided with a fourth electromagnetic valve (96), and the sludge return pipeline (104) is provided with a fifth electromagnetic valve (97).
4. The special sewage treatment device for the village and town sewage plant according to claim 3, wherein a plurality of inclined pipes (402) are uniformly arranged in the middle of the inner cavity of the vertical inclined pipe secondary sedimentation tank (4), all the inclined pipes (402) are arranged in parallel and obliquely, the water outlet end of the first pipeline (904) is suspended below the inclined pipes (402), and a steel plate sludge hopper (401) matched with the sludge pipe (404) is arranged on the bottom wall of the inner cavity of the vertical inclined pipe secondary sedimentation tank (4).
5. The special sewage treatment device for the village and town sewage plant according to claim 4, wherein the biological filter (5) is internally provided with a denitrification filler (501), the biological filter (5) is communicated with the clean water tank (6) through a backwashing pipeline (502), the water outlet end of the backwashing pipeline (502) is arranged below the denitrification filler (501), the water inlet end of the backwashing pipeline (502) is communicated with the air lift pump (9) fixedly arranged in the clean water tank (6), the backwashing pipeline (502) is provided with a sixth electromagnetic valve (98), the biological filter (5) is communicated with the regulating tank (101) through a backwashing drain pipe (504), the water inlet end of the backwashing drain pipe (504) is arranged 10cm above the denitrification filler (501), and the backwashing drain pipe (504) is provided with a second electromagnetic valve (503).
6. The sewage treatment plant special for the village and town sewage plant according to claim 5, wherein a PLC control cabinet (1001) is installed in the electric control room (10), and the PLC control cabinet (1001) is respectively connected with the submersible sewage pump (102), the rotary mechanical grid (103), the first electromagnetic valve (403), the second electromagnetic valve (503), the fourth electromagnetic valve (96), the fifth electromagnetic valve (97), the sixth electromagnetic valve (98), the fan (8) and the pipeline type ultraviolet sterilizer (1002).
7. The sewage treatment plant special for the village and town sewage plant according to claim 6, wherein said air-lift pump (9) comprises an air inlet chamber (94), the inlet end of said air inlet chamber (94) is respectively connected with a water suction bell mouth (95) and an air pipe (92) in a penetrating manner, the outlet end of said air inlet chamber (94) is connected with a water outlet pipe (93) in a penetrating manner, said air pipe (92) is connected with a fan (8) in a penetrating manner, a third electromagnetic valve (91) is installed on said air pipe (92), and said third electromagnetic valve (91) is connected with a PLC control cabinet (1001).
8. The method for treating sewage treatment plant dedicated to sewage plants in villages and towns according to any one of claims 1 to 7, comprising the steps of:
s1) denitrogenation treatment: firstly, sewage in a regulating tank (101) is pumped by a sewage submersible pump (102) and is injected into an anoxic tank (1) by a water inlet pipe (901); meanwhile, returned sludge from a sludge return pipeline and nitrified liquid from a nitrified liquid return pipeline return to the anoxic tank (1), under the action of microorganisms, an organic carbon source is used as an electron donor, and sewage from a water inlet pipe (901), returned nitrified liquid and NOx in sludge are treated-1The nitrogen is reduced to be separated from the water body and enter the air, so that the water body is purified;
s2) phosphorus release treatment: the sewage treated in the anoxic tank (1) enters the anaerobic tank (2) through the first overflowing hole (902), and phosphorus is released under the action of microorganisms in the anaerobic tank (2);
s3) phosphorus reduction and aeration treatment: the sewage treated in the anaerobic tank (2) enters the aerobic tank (3) through the second overflowing hole (903), then is aerated through the tubular aerator (301), and meanwhile, the suspended filler (302) in the aerobic tank (3) provides conditions for microorganism attachment, so that the biomass and the impact load resistance of the aerobic tank (3) are improved; the aerobic tank is internally provided with a plurality of microorganism systems of different types, such as a suspension aerobic type, an attached facultative type, an attached anoxic type and an attached anaerobic type, so that the aerobic tank (3) can complete the functions of removing organic matters, nitrogen and phosphorus from the sewage;
s4) precipitation treatment: the sewage treated in the aerobic tank (3) enters a vertical inclined tube secondary sedimentation tank (4) through a first pipeline (904), and the sedimentation of solid particle impurities is completed in the vertical inclined tube secondary sedimentation tank (4);
s5) biological filter treatment: the sewage precipitated in the vertical inclined tube secondary sedimentation tank (4) enters the biological filter (5) through the third through hole (905) and is filtered under the action of the denitrification filler (501), so that the contents of SS, total nitrogen and total phosphorus in the effluent can be effectively reduced, and the water quality is further improved; wherein, the denitrification filler (501) selects ceramsite with the diameter of 1cm as the filler;
s6) disinfection treatment: after the clean water filtered in the biological filter (5) enters a clean water tank (6), the clean water is injected into a pipeline type ultraviolet sterilizer (1002) under the action of a second pipeline (908) for ultraviolet irradiation disinfection and sterilization, the content of most viruses and bacteria in the tail water is reduced, and the treatment of the sewage can be finished.
CN201910989717.6A 2019-10-17 2019-10-17 Special sewage treatment device for sewage plant in villages and towns and treatment method thereof Pending CN110713315A (en)

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