CN112759203A

CN112759203A - Sewage treatment device

Info

Publication number: CN112759203A
Application number: CN202110122507.4A
Authority: CN
Inventors: 梁伦硕; 盘章俊; 陈明翠; 姚海军; 陈珣; 汪君晖; 屈红; 赵正涛
Original assignee: Chongqing Neide Environmental Technology Co ltd
Current assignee: Chongqing Neide Environmental Technology Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-05-07

Abstract

The invention relates to a sewage treatment device, and belongs to the technical field of sewage treatment. The sewage treatment device comprises an anaerobic zone, an anoxic first zone, an anoxic and aerobic multifunctional zone, an anoxic second zone, an aerobic zone, a membrane zone and a deep phosphorus removal zone which are sequentially arranged side by side, wherein partitions are arranged between the anaerobic zone, the anoxic first zone, the anoxic and aerobic multifunctional zone, the anoxic second zone, the aerobic zone, the membrane zone and the deep phosphorus removal zone, openings are formed in the tops of the partitions between the anaerobic zone and the anoxic first zone, the anoxic and aerobic multifunctional zone and between the aerobic zone and the membrane zone, and openings are formed in the bottoms of the partitions between the anoxic first zone and the anoxic and aerobic multifunctional zone and between the anoxic second zone and the aerobic zone. Has the advantages that: compared with the existing multifunctional anoxic and aerobic areas, the multifunctional anoxic and aerobic areas are arranged, water is fed in multiple points, multi-section backflow is realized, the regulation is flexible, and the multifunctional anoxic and aerobic areas can adapt to complex water quality; and a deep phosphorus removal area is set to ensure that the total phosphorus of the effluent reaches the standard.

Description

Sewage treatment device

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment device.

Background

With the increasing importance of people on environmental protection, the treatment standard of domestic sewage is gradually improved, the treatment standard of most regions is improved to the first class A standard in the discharge Standard of pollutants for municipal wastewater treatment plants (GB18918-2002), and the treatment standard is improved to the standard of quasi-four types of water in part of places with important environmental protection. At present, the domestic sewage treatment mostly adopts an activated sludge method and a biomembrane method. The main process of the activated sludge process is A2O, the process consists of an aeration tank, a sedimentation tank, a sludge reflux and excess sludge discharge system, and sewage achieves the purification effect through biochemical reaction and physical precipitation in the system. The biomembrane process has the main processes of biological contact oxidation, biological fluidized bed, etc. and is mainly characterized in that biological organisms are attached to the surface of the filler to form a biomembrane, and after the sewage is contacted with the biomembrane, dissolved organic pollutants are absorbed and converted into H2O, CO2, NH3, biological cells, etc. by microorganisms, so that the sewage is purified. By adopting the traditional A2O treatment process and the biofilm method, when the carbon-nitrogen ratio is less than 4 and the ammonia nitrogen in the inlet water is higher than 45mg/L, the effluent index cannot reach the first-grade A standard in discharge Standard of pollutants for municipal wastewater treatment plants (GB 18918-2002).

Therefore, a sewage treatment device is provided to solve the defects in the prior art.

Disclosure of Invention

The invention provides a sewage treatment device for solving the technical problems, which is provided with an anoxic and aerobic multifunctional area, water is fed in multiple points, multi-section backflow is realized, the regulation is flexible, and the device is suitable for complex water quality; and a deep phosphorus removal area is set to ensure that the total phosphorus of the effluent reaches the standard.

The technical scheme for solving the technical problems is as follows: this sewage treatment plant is including the anaerobic zone, the first district of oxygen deficiency, the good oxygen district of oxygen deficiency good oxygen multi-functional district, two districts of oxygen deficiency, good oxygen district, membrane district and the degree of depth dephosphorization district that set gradually side by side, the anaerobic zone the first district of oxygen deficiency good oxygen multi-functional district the two districts of oxygen deficiency good oxygen district membrane district with all be equipped with the baffle between the degree of depth dephosphorization district is adjacent, the anaerobic zone with between the first district of oxygen deficiency the baffle top the good oxygen multi-functional district with between the two districts of oxygen deficiency the baffle top and good oxygen district with between the membrane district the baffle top all is equipped with the opening, the oxygen deficiency district with between the good oxygen multi-functional district of oxygen baffle bottom and the two districts of oxygen deficiency with between the good oxygen district the baffle bottom all is equipped with the opening.

Has the advantages that: compared with the existing multifunctional anoxic and aerobic areas, the multifunctional anoxic and aerobic areas are arranged, water is fed in multiple points, multi-section backflow is realized, the regulation is flexible, and the multifunctional anoxic and aerobic areas can adapt to complex water quality; and a deep phosphorus removal area is set to ensure that the total phosphorus of the effluent reaches the standard.

Furthermore, submersible stirrers are arranged at the inner bottoms of the first anoxic zone and the second anoxic zone.

The beneficial effect of adopting the further scheme is that: ensure the sewage in the area to be uniformly mixed and simultaneously prevent the sludge from being accumulated.

Further, the upper parts of the anaerobic zone, the first anoxic zone and the second anoxic zone are all provided with water inlet pipes.

The beneficial effect of adopting the further scheme is that: the water inlet proportion of the water inlet pipe is automatically adjusted according to the water quality of inlet water, so that the efficient utilization of the carbon source of the inlet water is realized, and the supplement amount of the external carbon source is reduced.

Further, aeration devices are arranged at the inner bottom of the anoxic and aerobic multifunctional zone, the aerobic zone and the membrane zone.

The beneficial effect of adopting the further scheme is that: is convenient for realizing the functions of oxygenation and sludge stirring.

Furthermore, polyurethane suspension fillers are arranged in the anoxic and aerobic multifunctional area, the aerobic area and the deep dephosphorization area.

The beneficial effect of adopting the further scheme is that: increase the diversity and quantity of organisms in the area and strengthen the biochemical effect.

Furthermore, filler blocking nets are arranged at the opening of the partition plate between the first anoxic zone and the first anoxic zone, the opening of the partition plate between the second anoxic zone and the second aerobic zone, and the openings of the partition plates between the first anoxic zone and the membrane zone.

The beneficial effect of adopting the further scheme is that: and the filler loss is prevented.

Further, the bottom is equipped with in the end of oxygen deficiency good oxygen multi-functional district and is used for flowing back extremely the one-level backwash pump of oxygen deficiency first zone front end, the bottom is equipped with in the end of oxygen deficiency second zone and is used for flowing back extremely the second grade backwash pump of anaerobic zone front end, the bottom is equipped with in the end of membrane area and is used for flowing back extremely the tertiary backwash pump of the front end of oxygen deficiency good oxygen multi-functional district.

The beneficial effect of adopting the further scheme is that: a primary reflux pump is arranged to supplement the sludge concentration of the anaerobic zone, so as to ensure the phosphorus release effect; a secondary reflux pump is arranged to convey the mixed liquid containing nitrate nitrogen to an anoxic zone, so that the nitrate nitrogen is converted into nitrogen in an anoxic environment to achieve the aim of denitrification; and a three-stage reflux pump is arranged to convey the high-concentration sludge in the membrane area to the anoxic-aerobic multifunctional area to maintain the sludge concentration balance of the system.

Further, an MBR membrane is arranged in the membrane area.

The beneficial effect of adopting the further scheme is that: active sludge is intercepted, and meanwhile, part of macromolecular viruses are filtered out, so that the standard of the effluent SS is guaranteed.

Further, a sludge hopper is arranged in the bottom of the deep phosphorus removal area.

The beneficial effect of adopting the further scheme is that: is convenient for quickly removing the sludge.

Further, still include the equipment district, be provided with in the equipment district be used for with the water of membrane district inhales the degree of depth dephosphorization district's self priming pump, still be equipped with in the equipment district and be used for controlling one-level backwash pump, second grade backwash pump, tertiary backwash pump with the control system of self priming pump.

The beneficial effect of adopting the further scheme is that: intelligent control, convenient operation improves work efficiency.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a flow chart of the operation of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1. an anaerobic zone; 2. a hypoxia first region; 21. a submersible mixer; 3. an anoxic and aerobic multifunctional area; 31. an aeration device; 32. a first-stage reflux pump; 4. a hypoxic second region; 41. a secondary reflux pump; 5. an aerobic zone; 6. a membrane zone; 61. a third-stage reflux pump; 7. a deep dephosphorization zone; 8. an equipment area; 9. a partition plate; 10. a polyurethane suspended filler; 11. a water inlet pipe; 12. a filler block; 13. a sludge hopper.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1, the present embodiment provides a sewage treatment device, a water inlet and a water outlet, further comprising: an anaerobic zone 1, an anoxic first zone 2, an anoxic and aerobic multifunctional zone 3, an anoxic second zone 4, an aerobic zone 5, a membrane zone 6 and a deep phosphorus removal zone 7 which are arranged in sequence side by side, sewage enters the anaerobic zone 1 through a water inlet, the anaerobic zone 1, the first anoxic zone 2, the multifunctional anoxic and aerobic zone 3, the second anoxic zone 4, the aerobic zone 5, the membrane zone 6 and the deep phosphorus removal zone 7 are provided with clapboards 9 between adjacent parts, openings are arranged on the top of the partition board 9 between the anaerobic zone 1 and the first anoxic zone 2, the top of the partition board 9 between the multifunctional anoxic and aerobic zone 3 and the second anoxic zone 4 and the top of the partition board 9 between the aerobic zone 5 and the membrane zone 6, openings are formed in the bottom of the partition plate 9 between the first anoxic zone 2 and the first anoxic and aerobic multifunctional zone 3 and in the bottom of the partition plate 9 between the second anoxic zone 4 and the aerobic zone 5.

The anoxic and aerobic multifunctional area 3 is provided with a fan for aeration and can be used for time adjustment, and the area can be adjusted into an anoxic environment or an aerobic environment according to water quality, so that nitrogen can be removed conveniently. Polyurethane suspended filler 10 is added in the area to improve the biochemical property, the anoxic second area 4 is a deep denitrification area, and partial sewage enters the area to supplement a carbon source required by denitrification; the aerobic zone 5 is used for treating the residual organic matters in the system, and polyurethane suspension filler is added into the aerobic zone to improve the biochemical property; the membrane area 6 is a membrane filtration unit, specifically an MBR membrane; the deep dephosphorization zone 7 is used for treating overproof P in the system, and the polyurethane filter filler 10 is arranged in the zone.

Preferably, in this embodiment, the inner bottom of the first anoxic zone 2 and the second anoxic zone 4 is provided with a submersible stirrer 21, so that sewage in the anoxic zone is uniformly mixed, and sludge precipitation is avoided.

Preferably, in this embodiment, inlet tube 11 is all installed on the upper portion of anaerobic zone 1, first district 2 of oxygen deficiency and second district 4 of oxygen deficiency, and inlet tube 11 runs through in the district that corresponds, and sets up the grid of filtering impurity.

Preferably, in this embodiment, the anoxic and aerobic multifunctional zone 3, the aerobic zone 5 and the inner bottom of the membrane zone 6 are all provided with aeration devices 31, so as to facilitate the functions of oxygenation and sludge stirring.

Preferably, in this embodiment, polyurethane suspension fillers 10 are disposed in the anoxic and aerobic multifunctional zone 3, the aerobic zone 5 and the deep phosphorus removal zone 7, so as to increase the diversity and number of organisms in this zone and enhance biochemical effect.

Preferably, in this embodiment, filler blocking nets 12 are disposed at the opening of the partition board 9 between the first oxygen-poor region 2 and the first oxygen-poor multifunctional region 3, the opening of the partition board 9 between the first oxygen-poor multifunctional region 3 and the second oxygen-poor region 4, the opening of the partition board 9 between the second oxygen-poor region 4 and the aerobic region 5, and the openings of the partition board 9 between the aerobic region 5 and the membrane region 6, so as to prevent filler from losing.

Preferably, in this embodiment, the inner bottom of the end of the anoxic-aerobic multifunctional zone 3 is provided with a primary reflux pump 32 for refluxing to the front end of the anoxic-first zone 2, the inner bottom of the end of the anoxic-second zone 4 is provided with a secondary reflux pump 41 for refluxing to the front end of the anaerobic zone 1, the inner bottom of the end of the membrane zone 6 is provided with a tertiary reflux pump 61 for refluxing to the front end of the anoxic-aerobic multifunctional zone 3, and the primary reflux pump 32 is arranged for supplementing the sludge concentration in the anaerobic zone 1 to ensure the phosphorus release effect; a secondary reflux pump 41 is arranged to convey the mixed liquid containing nitrate nitrogen to an anoxic second zone 4, so that the nitrate nitrogen is converted into nitrogen in an anoxic environment to achieve the aim of denitrification; and a three-stage reflux pump 61 is arranged to convey the high-concentration sludge in the membrane area to the anoxic and aerobic multifunctional area 3 to maintain the sludge concentration balance of the system.

Preferably, in this embodiment, the device further includes a device area 8, a self-priming pump for sucking the water in the membrane area 6 into the deep dephosphorization area 7 is disposed in the device area 8, a control system for controlling the first-stage reflux pump 32, the second-stage reflux pump 41, the third-stage reflux pump 61 and the self-priming pump is further disposed in the device area 8, and the control system is a PLC control system.

The anaerobic zone 1 has a retention time of 1.5h and a dissolved oxygen concentration of less than 0.2mg/L, and has the main function of releasing phosphorus.

The anoxic zone I has a retention time of 2 hours and a dissolved oxygen concentration of 0.2-0.5mg/L, and has the main function of denitrification.

The oxygen-poor and aerobic multifunctional area 3 stays for 6 hours, the concentration of dissolved oxygen is 0.2-4mg/L, and the main functions are organic matter degradation, nitrification and denitrification and excessive phosphorus uptake. The aeration quantity and time of the area can be adjusted according to the water quality, the area can be adjusted to an aerobic area to finish nitration reaction, and can also be adjusted to an anoxic area to prolong the denitrification time and strengthen the removal of total nitrogen. The polyurethane suspended filler 10 is filled in the area, so that the diversity and the quantity of organisms in the area are increased, and the biochemical effect is enhanced. The area is provided with an alkalinity adding point, and alkalinity can be automatically added according to the PH value of sewage in the area.

The anoxic zone 4 stays for 2 hours, the dissolved oxygen concentration is 0.2-0.5mg/L, and the main function is to continue denitrification and increase the removal rate of total nitrogen. The area is provided with a carbon source adding point.

The 5-hour retention time of the aerobic zone is 1.5h, the oxygen concentration is 2-4mg/L, the residual COD and ammonia nitrogen in the sewage are continuously degraded, and the COD and ammonia nitrogen are ensured to completely reach the standard. The polyurethane suspended filler 10 is filled in the area, so that the diversity and the quantity of organisms in the area are increased, and the biochemical effect is enhanced. The area is provided with an alkalinity adding point, and alkalinity can be automatically added according to the PH value of sewage in the area.

The retention time of an MBR membrane area is 1.8h, the oxygen-decomposing concentration is 2-4mg/L, and the membrane filtration area mainly has the function of removing SS and partial virus in sewage.

The deep dephosphorization zone has 7 retention times of 2 hours, and has the main function of carrying out chemical dephosphorization on the sewage to ensure that the P reaches the standard. The area is provided with a phosphorus removal dosing point to remove P. Meanwhile, the polyurethane suspended filler 10 is arranged, so that the effluent SS reaches the standard.

The working process is as follows: as shown in figure 2 of the drawings, in which,

one, control point

(1) And three water inlet points of the equipment: q1 is the water inlet point at the front end of the anaerobic zone 1, Q2 is the water inlet point at the front end of the anoxic first zone 2, and Q3 is the water inlet point at the front end of the anoxic second zone 4.

(2) R1 is the tail end of the anoxic second zone 4 and flows back to the front end of the anaerobic zone 1, R2 is the tail end of the anoxic-aerobic multifunctional zone 3 and flows back to the front end of the anoxic first zone 2, and R3 is the tail end of the MBR membrane zone and flows back to the front end of the anoxic-aerobic multifunctional zone 3.

(3) And carbon source dosing point: TY1 is the carbon source dosing point of the anoxic first region 2, and TY2 is the carbon source dosing point of the anoxic second region 4.

(4) Alkalinity dosing point: JY1 is an anoxic and aerobic multifunctional zone 3 alkalinity dosing point, and JY2 is an aerobic zone 5 alkalinity dosing point.

(5) And phosphorus removal and dosing points: PY1MBR is the phosphorus removal dosing point of membrane zone 6, PY2 is the phosphorus removal dosing point of degree phosphorus removal zone 7.

(6) And online detection: each zone is provided with an online detection instrument.

Second, control operation method

1. Flexibly adjusting the water inlet proportion

The equipment is provided with three water inlet points, and the water inlet proportion of Q1, Q2 and Q3 is automatically adjusted according to the water quality of inlet water, so that the efficient utilization of the carbon source of the inlet water is realized, and the supplement amount of the external carbon source is reduced.

2. Automatic regulation of reflux ratio

(1) R1 reflux ratio adjustment: the set value of the nitrate nitrogen content of the anaerobic zone 1 is SN0, and the online detection value of the nitrate nitrogen content of the anaerobic zone 1 is KN 0; when SN0 is greater than KN0, the control system feeds back a signal to the primary reflux pump, the operation frequency of the primary reflux pump 32 is increased, and the reflux ratio of R1 is increased until the | -SN 0-KN0 | < 0.1 mg/L; when SN0 is less than KN0, the control system feeds back a signal to the first-stage reflux pump, reduces the operating frequency of the first-stage reflux pump 32, and reduces the reflux ratio of R1 until the total weight of SN0-KN0 ≦ 0.1 mg/L; by dynamically adjusting the reflux ratio of R1, the TP removal rate of the system is improved, and the energy consumption is reduced. The reflux effect of R1 is to supplement the sludge concentration in the anaerobic zone and ensure the phosphorus release effect.

(2) R2 reflux ratio adjustment: the set value of the nitrate nitrogen content at the tail end of the anoxic first zone 2 is SN1, and the online detection value of the nitrate nitrogen content at the tail end of the anoxic first zone 2 is KN 1; when SN1 is greater than KN1, the control system feeds back a signal to the secondary reflux pump 41, the operating frequency of the secondary reflux pump 41 is increased, and the reflux ratio of R2 is increased until | -SN 1-KN1 |. is less than or equal to 0.1 mg/L; when SN1 is less than KN1, the control system feeds back a signal to the secondary reflux pump 41, reduces the operating frequency of the secondary reflux pump 41, and reduces the reflux ratio of R2 until the total weight of SN1-KN1 | ≦ 0.1 mg/L; by dynamically adjusting the reflux ratio of R2, the TN removal rate of the system is improved, and the energy consumption is reduced. The reflux of R2 is to transfer the mixed liquid containing nitrate nitrogen to anoxic area to convert nitrate nitrogen into nitrogen in anoxic environment for denitrification.

(3) R3 reflux ratio adjustment: an on-line sludge concentration detection value KW0 of the anoxic and aerobic multifunctional zone 3 and an on-line sludge concentration detection value KW1 of the membrane zone; when KW1-KW0 is more than 200mg/L, a control system feeds back signals to the three-stage reflux pump 61, the running frequency of the three-stage reflux pump 61 is improved, and the R3 reflux ratio is increased until KW1-KW0 is equal to 200 mg/L; when KW1-KW0 is less than 200mg/L, a control system feeds back signals to the three-stage reflux pump 61, the running frequency of the three-stage reflux pump is reduced, and the R3 reflux ratio is reduced until KW1-KW0 is equal to 200 mg/L; by dynamically adjusting the reflux ratio of R3, the uniformity of the sludge concentration of the system is maintained, and the energy consumption is reduced. And R3 is returned to convey the high-concentration sludge in the membrane area to the anoxic and aerobic multifunctional area 3 to maintain the sludge concentration balance of the system.

3. Automatic control of dosage

(1) Automatic alkalinity adding (NaHCO 3 is commonly used agent)

And automatically adding alkalinity according to the PH values of the anoxic and aerobic multifunctional area 3 and the aerobic area 5 until the PH value reaches a set value.

(2) Automatic adding of carbon source (common medicament is sodium acetate and glucose)

And automatically adding a carbon source according to the C/N ratio of the anoxic first zone 2 and the anoxic second zone 4 until the C/N ratio reaches a set value.

(3) Dephosphorization and dosing are automatically carried out (the common medicament is polyaluminium chloride or FeSO 4.7H 2O)

PAC is automatically added according to the total phosphorus content of a membrane area, and an adding limit value is set according to the type of PAC medicament, so that the excessive PAC addition is avoided, and the biochemical reaction of a system is inhibited. And automatically adding PAC medicament according to the total phosphorus content of the deep phosphorus removal zone 7 until the total phosphorus in the effluent of the deep phosphorus removal zone 7 meets the requirement.

4. Anoxic and aerobic multifunctional zone 3 regulation

When the nitrate nitrogen content in the system is high, the aeration time and the aeration quantity of the anoxic and aerobic multifunctional area 3 can be reduced, the area can be adjusted to be an anoxic environment in a set time, the denitrification effect is enhanced, and the total nitrogen is reduced.

5. Automatic regulation of aeration rate

The aeration quantity is automatically adjusted according to the dissolved oxygen content of the aerobic zone 5, so as to maintain the stability of the dissolved oxygen of the system and reduce the energy consumption.

The working principle is as follows:

according to the water quality, the equipment is divided into three points for water inlet, namely an anaerobic zone 1, an anoxic first zone 2 and an anoxic second zone 4. The sewage is subjected to hydrolysis acidification reaction in the anaerobic zone 1, and meanwhile, phosphorus is released by the phosphorus-accumulating bacteria under anaerobic conditions.

The upper part of the partition board 9 of the anaerobic zone 1 and the anoxic zone 2 is opened, sewage is hydrolyzed and acidified and then flows through the anoxic zone 2 by self weight, the anoxic zone 2 is provided with the submersible stirrer 21, the sewage in the zone is uniformly mixed, and meanwhile, sludge is prevented from being accumulated in the anoxic zone. In the anoxic zone I2, the denitrifying bacteria use organic matters in the sewage as carbon sources to reduce a large amount of nitrate nitrogen brought by the reflux liquid in the anoxic and aerobic multifunctional zone 3 into nitrogen and release the nitrogen to the air, so that the aim of denitrification is fulfilled.

The lower parts of the anoxic first zone 2 and the anoxic and aerobic multifunctional zone 3 are provided with overflow ports, and the overflow ports are provided with filler blocking nets 12 to prevent filler loss. In the anoxic and aerobic multifunctional zone 3, the organic matter is degraded continuously, meanwhile, nitration reaction is carried out, ammonia nitrogen is converted into nitrate nitrogen, and meanwhile, phosphorus-accumulating bacteria excessively take in phosphorus in the zone. According to the water quality, the area can be adjusted to be an anoxic environment, so that the denitrification time is prolonged, and the denitrification effect is enhanced.

The upper part of the clapboard between the anoxic and aerobic multifunctional area 3 and the anoxic second area 4 is provided with a flow opening, and a filler blocking net 12 is arranged to prevent the filler from losing. The anoxic zone two 4 continues denitrification reaction to convert the residual nitrate nitrogen in the system into nitrogen, and meanwhile, a water inlet point is arranged in the zone to supplement a carbon source required by denitrification and reduce the usage amount of an additional carbon source.

The lower part of the clapboard 9 between the anoxic zone two 4 and the aerobic zone 5 is provided with a flow opening, and a filler blocking net 12 is arranged to prevent the filler from losing. The aerobic zone 5 is mainly used for treating excessive carbon sources in the inlet water of the anoxic zone II or adding excessive carbon sources to ensure that the COD of the outlet water reaches the standard.

The upper parts of the clapboards 9 of the aerobic zone 5 and the membrane zone 6 are provided with overflowing holes, and a filler blocking net 12 is arranged to prevent the filler from losing. The membrane area 6 is provided with a membrane component for intercepting activated sludge and filtering out part of macromolecular viruses, thereby ensuring that the effluent SS reaches the standard.

After the sewage is filtered by the membrane module, the sewage is produced to a deep dephosphorization zone 7 by a self-priming pump, a dephosphorization dosing point is arranged in the zone, a dephosphorization reagent can be selected from polyaluminium chloride or FeSO4 & 7H2O, and the effluent P is ensured to reach the standard by a chemical dephosphorization mode. The filtering filler is arranged in the region to filter out suspended matters generated in the dephosphorization process. After filtering, the sewage is automatically discharged.

Has the advantages that: (1) and multi-point water feeding is adopted, so that the utilization rate of a water-feeding carbon source is improved, the dosage of a system is reduced, and the operation cost is saved.

(2) And automatically adjusting the reflux ratio according to the water quality data of each area.

(3) According to the nitrate nitrogen content in the system, the aeration time and the aeration quantity of the anoxic and aerobic multifunctional zone 3 are automatically adjusted.

(4) And the aeration quantity of the fan is automatically adjusted according to the dissolved oxygen values of the anoxic and aerobic multifunctional zone 3 and the aerobic zone 5.

(5) And automatically adjusting the dosage according to the operating environment of each region.

In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to 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.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a sewage treatment device, includes water inlet and delivery port, its characterized in that still includes:

anaerobic zone (1), oxygen deficiency zone (2), oxygen deficiency aerobic multifunctional zone (3), oxygen deficiency zone two (4), aerobic zone (5), membrane zone (6) and degree of depth dephosphorization zone (7) that set gradually side by side, anaerobic zone (1) oxygen deficiency zone (2) oxygen deficiency aerobic multifunctional zone (3) oxygen deficiency zone two (4) aerobic zone (5) membrane zone (6) with degree of depth dephosphorization zone (7) all is equipped with baffle (9) between adjacent, anaerobic zone (1) with between oxygen deficiency zone (2) baffle (9) top oxygen deficiency multifunctional zone (3) with between oxygen deficiency zone two (4) baffle (9) top and aerobic zone (5) with between membrane zone (6) baffle (9) top all is equipped with the opening, oxygen deficiency zone (2) with between oxygen deficiency multifunctional zone (3) baffle (9) bottom and lack phosphorus zone (7) Openings are formed in the bottom of the partition plate (9) between the second oxygen zone (4) and the aerobic zone (5).

2. Sewage treatment plant according to claim 1, characterised in that the inner bottoms of said first anoxic zone (2) and said second anoxic zone (4) are provided with submerged agitators (21).

3. Sewage treatment plant according to claim 2, characterised in that the upper parts of the anaerobic zone (1), the first anoxic zone (2) and the second anoxic zone (4) are equipped with water inlet pipes (11).

4. Sewage treatment plant according to claim 3, characterised in that said anoxic and aerobic multifunctional zone (3), said aerobic zone (5) and the inner bottom of said membrane zone (6) are equipped with aeration means (31).

5. The sewage treatment plant according to claim 1, wherein polyurethane suspension packing is provided in the anoxic and aerobic multifunctional zone (3), the aerobic zone (5) and the deep dephosphorization zone (7).

6. Sewage treatment plant according to claim 5, characterised in that at the opening of said partition (9) between said first anoxic zone (2) and said first anoxic and aerobic multifunctional zone (3), at the opening of said partition (9) between said first anoxic and aerobic multifunctional zone (3) and said second anoxic zone (4), at the opening of said partition (9) between said second anoxic zone (4) and said aerobic zone (5) and at the opening of said partition (9) between said aerobic zone (5) and said membrane zone (6) there is a filler barrier (12).

7. The wastewater treatment plant according to any of the claims 1-6, characterized in that the terminal inner bottom of the anoxic and aerobic multifunctional zone (3) is provided with a primary reflux pump (32) for refluxing to the front end of the anoxic and primary zone (2), the terminal inner bottom of the anoxic and secondary zone (4) is provided with a secondary reflux pump (41) for refluxing to the front end of the anaerobic zone (1), and the terminal inner bottom of the membrane zone (6) is provided with a tertiary reflux pump (61) for refluxing to the front end of the anoxic and aerobic multifunctional zone (3).

8. Sewage treatment plant according to claim 7, characterised in that said membrane zone (6) is provided with MBR membranes.

9. Sewage treatment plant according to claim 7, characterised in that a sludge hopper (13) is provided in the bottom of said deep phosphorus removal zone (7).

10. Sewage treatment plant according to claim 9, further comprising a device area (8), wherein a self-priming pump for sucking water of said membrane area (6) into said deep dephosphorizing area (7) is arranged in said device area (8), and a control system for controlling said primary reflux pump (32), said secondary reflux pump (41), said tertiary reflux pump (61) and said self-priming pump is further arranged in said device area (8).