CN111186912A - Sewage treatment device and sewage treatment process - Google Patents

Sewage treatment device and sewage treatment process Download PDF

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Publication number
CN111186912A
CN111186912A CN201910731316.0A CN201910731316A CN111186912A CN 111186912 A CN111186912 A CN 111186912A CN 201910731316 A CN201910731316 A CN 201910731316A CN 111186912 A CN111186912 A CN 111186912A
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CN
China
Prior art keywords
tank
sewage treatment
activated sludge
circuit
sequencing batch
Prior art date
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Pending
Application number
CN201910731316.0A
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Chinese (zh)
Inventor
浠绘尝
任波
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Shandong Zehui Environmental Protection Equipment Co Ltd
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Shandong Zehui Environmental Protection Equipment Co Ltd
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Priority to CN201910731316.0A priority Critical patent/CN111186912A/en
Publication of CN111186912A publication Critical patent/CN111186912A/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
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • 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
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/1236Particular type of activated sludge installations
    • C02F3/1263Sequencing batch reactors [SBR]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/105Phosphorus compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The embodiment of the invention discloses a sewage treatment device and a sewage treatment process, wherein the sewage treatment device comprises an anaerobic pool, a facultative tank, an aerobic pool and a reaction pool adopting a sequencing batch activated sludge process, which are sequentially communicated, wherein the upper part of the anaerobic pool is communicated with the facultative tank, and the lower part of the facultative tank is communicated with the lower part of the aerobic pool; the sewage treatment device also comprises a partition plate arranged between the aerobic tank and the sequencing batch activated sludge process reaction tank, the upper part of the partition plate is provided with an opening communicated with the aerobic tank and the sequencing batch activated sludge process reaction tank, and the opening is provided with a first decanter extending towards the aerobic tank. The sewage treatment device and the sewage treatment process of the embodiment of the invention fully combine A2O process and sequencing batch activated sludge processThe system can adapt to more complicated water quality of inlet water, and can ensure normal, stable and efficient operation of the system; the method is more obvious in the aspect of energy saving and consumption reduction, and can improve the nitrogen and phosphorus removal efficiency while ensuring the continuous and efficient operation of sewage treatment.

Description

Sewage treatment device and sewage treatment process
Technical Field
The embodiment of the invention relates to the technical field of sewage treatment, in particular to a sewage treatment device and a sewage treatment process.
Background
As early as 1914, the activated sludge process used intermittent water feed at the beginning of production. The drainage mode is operated, but because the operation is complicated, automatic control equipment and technology are lacked at that time, the drainage mode is quickly replaced by a continuous activated sludge method and is almost eliminated and forgotten. Until the 80 s of the 20 th century, the rapid development of hardware devices and software technologies for automatic monitoring and control, especially electronic computers, has attracted new activities for the application and development of the sequencing batch activated sludge process. At present, the process has the advantages of simple process flow, high treatment efficiency, flexible operation mode, difficult sludge expansion and the like, is a preferred process of small and medium-sized sewage treatment plants, and is widely applied all over the world. In China, a sequencing batch activated sludge process is adopted for treating sewage treatment plants with less than 5 ten thousand tons per 30-40% of days. In recent years, with the strictness of discharge standards of urban sewage treatment plants, higher requirements on discharge of nitrogen and phosphorus in effluent are put forward. How to improve the nitrogen and phosphorus removal efficiency of the process of the sequencing batch activated sludge process and save energy and reduce consumption on the basis has important significance for the application and development of the process.
Disclosure of Invention
Therefore, the embodiment of the invention provides a sewage treatment device and a sewage treatment process, and aims to solve the problems of single sewage quality, low efficiency, high energy consumption and low nitrogen and phosphorus removal efficiency in the conventional sewage treatment technology.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to a first aspect of embodiments of the present invention, there is provided a sewage treatment apparatus comprising an anaerobic tank, a facultative tank, an aerobic tank, and a reaction tank of a sequencing batch activated sludge process, which are sequentially communicated, wherein an upper portion of the anaerobic tank is communicated with the facultative tank, and a lower portion of the facultative tank is communicated with a lower portion of the aerobic tank; the sewage treatment device also comprises a partition plate arranged between the aerobic tank and the sequencing batch activated sludge process reaction tank, an opening communicated with the aerobic tank and the sequencing batch activated sludge process reaction tank is arranged at the upper part of the partition plate, and a first decanter extending towards the aerobic tank is arranged at the opening.
Further, sewage treatment plant still includes intake pump and inlet tube, the both ends of inlet tube communicate respectively the intake pump with the top in anaerobism pond.
Furthermore, the sewage treatment device also comprises a water outlet pipe connected to the upper part of the sequencing batch activated sludge process reaction tank, and a second decanter extending towards the sequencing batch activated sludge process reaction tank is connected to an opening of the water outlet pipe.
Furthermore, the sewage treatment device also comprises a first aeration pipe arranged at the bottom of the aerobic tank, a second aeration pipe arranged at the bottom of the reaction tank of the sequencing batch activated sludge process and a sludge reflux valve.
Further, the sewage treatment device also comprises a first fan and a second fan, wherein the first fan is communicated with the first aeration pipe and the second fan is communicated with the second aeration pipe respectively, the first fan is arranged at the top of the aerobic tank, and the second fan is arranged at the top of the reaction tank adopting the sequencing batch activated sludge process.
Furthermore, the sewage treatment device also comprises a sludge return pipe arranged at the bottom of the anaerobic tank, the facultative tank, the aerobic tank and the sequencing batch activated sludge process reaction tank.
Furthermore, the sewage treatment device also comprises a first circuit for controlling the on-off of the water inlet pump, a second circuit for controlling the on-off of the first fan and a third circuit for controlling the on-off of the second fan;
the first circuit comprises a first automatic switch, a floating ball switch, a first contactor and a first relay which are sequentially connected in series, the first circuit further comprises a first manual switch, the first manual switch is connected with the first automatic switch and the floating ball switch in parallel, the first manual switch is connected with the first contactor and the first relay in series, two ends of the first circuit are connected with a first power supply, and the water inlet pump is connected with a second power supply through the first relay;
the second circuit comprises a second automatic switch, a second contactor and a second relay which are sequentially connected in series, the second circuit further comprises a second manual switch, the second manual switch is connected with the second automatic switch in parallel, the second manual switch is connected with the second contactor and the second relay in series, two ends of the second circuit are connected with a first power supply, and the first fan is connected with a second power supply through the second relay;
the third circuit is including the third automatic switch, third contactor and the third relay of establishing ties in proper order, the third circuit still includes third hand switch, third hand switch with third automatic switch is parallelly connected, third hand switch with third contactor and third relay are parallelly connected, first power is connected at the both ends of third circuit, the second fan passes through the third relay and connects the second power.
According to a second aspect of embodiments of the present invention, there is provided a wastewater treatment process based on the wastewater treatment apparatus, the wastewater treatment process including: the sewage is treated by an anaerobic pool, a facultative pool, an aerobic pool and a sequencing batch activated sludge process reaction pool in turn.
The embodiment of the invention has the following advantages:
the sewage treatment device and the sewage treatment process of the embodiment of the invention fully combine A2The anaerobic tank plays roles of anaerobic hydrolysis and denitrification, the aerobic tank is a main treatment tank for continuous aeration, the reaction tank of the sequencing batch activated sludge process is a biochemical tank and replaces a secondary sedimentation tank, and the three types of tanks respectively play roles and are organically combined, so that the method can adapt to more complicated water quality of inlet water and can ensure normal, stable and efficient operation of the system; the method is more obvious in the aspect of energy saving and consumption reduction, and can improve the nitrogen and phosphorus removal efficiency while ensuring the continuous and efficient operation of sewage treatment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a sewage treatment apparatus provided in embodiments 1 to 6 of the present invention.
Fig. 2 is a circuit diagram of a sewage treatment apparatus provided in embodiment 7 of the present invention.
In the figure:
1 water inlet pump, 2 water inlet pipes and 3 anaerobic tanks
4 facultative tank, 5 aerobic tank and 6 first fan
8 second fan 9 outlet pipe 10 sequencing batch activated sludge process reaction tank
11 sludge reflux valve 12 second aeration pipe 13 baffle
14 first aeration pipe 15 sludge return pipe 16 water inlet floating ball
71 first decanter 72 second decanter
101 float switch 102 first contactor 103 first relay
104 first automatic switch 105 first manual switch
201 second contactor 202 second relay 203 second automatic switch
204 second manual switch
301 third contactor 302 third relay 303 third automatic switch
304 third manual switch
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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
The present embodiment provides a sewage treatment apparatus, as shown in fig. 1, the sewage treatment apparatus includes an anaerobic tank 3, a facultative tank 4, an aerobic tank 5, and a Sequencing Batch Reactor (SBR) reaction tank 10, which are sequentially connected, an upper portion of the anaerobic tank 3 is connected to the facultative tank 4, and a lower portion of the facultative tank 4 is connected to a lower portion of the aerobic tank 5; the sewage treatment device also comprises a partition plate 13 arranged between the aerobic tank 5 and the sequencing batch activated sludge process reaction tank 10, the upper part of the partition plate 13 is provided with an opening for communicating the aerobic tank 5 and the sequencing batch activated sludge process reaction tank 10, and the opening is provided with a first decanter 71 extending towards the aerobic tank 5. The aerobic tank 5 can be well communicated with the reaction tank 10 of the sequencing batch activated sludge process through the first decanter 71 at the upper opening of the partition plate 13.
A2The O device is divided according to space, has the advantages of good treatment effect and convenient management, but occupies a large area, and the sequencing batch activated sludge process divided according to time has the advantages of integration and land occupation saving, and combines the two, namely A2The O is connected with a sequencing batch activated sludge process tank to form A2O + sequencing batch activated sludge process. A. the2The O + sequencing batch active sludge process is one biochemical pond with continuous water inlet and continuous water outlet and consists of A2O system followed by sequencing batch activated sludge Process System, thus having A2The O biological denitrification function and the sequencing batch activated sludge process have the advantages of integration, simple flow, flexible control and the like. The sewage treatment device of the embodiment fully combines A2The advantages of O process and sequencing batch activated sludge process are that the anaerobic tank 3 plays a role in anaerobic hydrolysis and denitrification, the aerobic tank 5 is a main treatment tank for continuous aeration, and the reaction tank 10 of the sequencing batch activated sludge process is a biochemical tank and replaces the biochemical tankThe secondary sedimentation tank and the third type tank respectively play their own roles and are organically combined. The sewage treatment device of the embodiment can be used for sewage treatment, can adapt to more complex inflow water quality, and can ensure normal, stable and efficient operation of a system; meanwhile, the method is more obvious in the aspect of energy conservation and consumption reduction, and can improve the nitrogen and phosphorus removal efficiency while ensuring the continuous and efficient operation of sewage treatment.
Example 2
The sewage treatment device according to embodiment 1, as shown in fig. 1, further includes a water inlet pump 1 and a water inlet pipe 2, and two ends of the water inlet pipe 2 are respectively communicated with the water inlet pump 1 and the top of the anaerobic tank 3. Sewage to be treated enters the anaerobic tank 3 through the water inlet pump 1 and the water inlet pipe 2, and the water inlet speed of the sewage can be improved through the pumping action of the water inlet pump 1.
Example 3
The sewage treatment apparatus according to embodiment 1, as shown in fig. 1, further includes a water outlet pipe 9 connected to an upper portion of the sequencing batch activated sludge process reaction tank 10, and a second decanter 72 extending toward the sequencing batch activated sludge process reaction tank 10 is connected to an opening of the water outlet pipe 9.
The second decanter 72 can be made of stainless steel plate or glass fiber reinforced plastic for draining, and in the process of sewage treatment, the drainage form is also converted from intermittent drainage of water level rising and falling into continuous overflow with unchanged water level height (full tank operation), so that the effective volume of the tank of the sequencing batch activated sludge process is fully utilized, and the situation that the water level is sometimes high or sometimes low and the effective volume is wasted in the conventional sequencing batch activated sludge process is not the case.
Example 4
The sewage treatment apparatus according to embodiment 2, as shown in fig. 1, further includes a first aeration pipe 14 disposed at the bottom of the aerobic tank 5, a second aeration pipe 12 disposed at the bottom of the sequencing batch activated sludge process reaction tank 10, and a sludge recirculation valve 11.
Sufficient air (oxygen) can be provided for the aerobic tank 5 through the first aeration pipe 14, and the activated sludge in the aerobic tank 5 can better perform aerobic respiration to better decompose harmful organic matters in the sewage into inorganic matters so as to remove pollutants; similarly, the second aeration pipe 12 can provide sufficient air (oxygen) for the biodegradation process in the sequencing batch activated sludge process reaction tank, and organic components in the sewage can be better degraded into inorganic harmless substances.
Example 5
The sewage treatment apparatus according to embodiment 4, as shown in fig. 1, further includes a first fan 6 and a second fan 8, wherein the first fan 6 is connected to the first aeration pipe 14, the second fan 8 is connected to the second aeration pipe 12, the first fan 6 is disposed on the top of the aerobic tank 5, and the second fan 8 is disposed on the top of the reaction tank 10 of the sequencing batch activated sludge process. The first aeration tube 14 and the second aeration tube 12 can be well supplied with air (oxygen) by the first blower 6 and the second blower 8.
Example 6
The sewage treatment apparatus according to embodiment 4, as shown in fig. 1, further includes a sludge return pipe 15 disposed at the bottom of the anaerobic tank 3, the facultative tank 4, the aerobic tank 5, and the batch-type activated sludge process reaction tank 10.
The sludge return pipe 15 is communicated with the sludge return valve 11, and when the sludge return valve 11 is opened, the sludge in the reaction tank 10 adopting the sequencing batch activated sludge process can enter the sludge return pipe 15 through the sludge return valve 11 so as to conveniently flow to the aerobic tank 5, the facultative tank 4 and the anaerobic tank 3.
Example 7
The sewage treatment device according to embodiment 5, as shown in fig. 2, further includes a first circuit for controlling the on/off of the water inlet pump 1, a second circuit for controlling the on/off of the first fan 6, and a third circuit for controlling the on/off of the second fan 8;
the first circuit comprises a first automatic switch 104, a float switch 101, a first contactor 102 and a first relay 103 which are sequentially connected in series, the first circuit further comprises a first manual switch 105, the first manual switch 105 is connected with the first automatic switch 104 and the float switch 101 in parallel, the first manual switch 105 is connected with the first contactor 102 and the first relay 103 in series, two ends of the first circuit are connected with a first power supply, and the water inlet pump 1 is connected with a second power supply through the first relay 103;
the second circuit comprises a second automatic switch 203, a second contactor 201 and a second relay 202 which are sequentially connected in series, the second circuit further comprises a second manual switch 204, the second manual switch 204 is connected with the second automatic switch 203 in parallel, the second manual switch 204 is connected with the second contactor 201 and the second relay 202 in series, two ends of the second circuit are connected with a first power supply, and the first fan 6 is connected with the second power supply through the second relay 202;
the third circuit includes third automatic switch 303, third contactor 301 and the third relay 302 of establishing ties in proper order, the third circuit still includes third manual switch 304, third manual switch 304 with third automatic switch 303 is parallelly connected, third manual switch 304 with third contactor 301 and third relay 302 are parallelly connected, first power is connected at the both ends of third circuit, second fan 8 connects the second power through third relay 302.
The specific control mode is as follows:
the method comprises the steps that a first circuit of a water inlet pump 1 is controlled, when automatic switch control is selected, the whole circuit comprises a first automatic switch 104, a float switch 101, a first contactor 102 and a first relay 103 which are sequentially connected in series, the first automatic switch 104 and the float switch 101 are turned on, the water inlet pump 1 starts to operate to pump sewage to be treated into an anaerobic pool 3, when the water level in the anaerobic pool 3 gradually rises until a floating ball in the float switch 101 is empty, the float switch 101 is turned off, the circuit is disconnected, and the water inlet pump 1 stops operating; when the manual switch is selected for control, the whole circuit comprises a first manual switch 105, a first contactor 102 and a first relay 103 which are sequentially connected in series, the first manual switch 105 is turned on, the circuit is communicated with the water inlet pump 1 to start to operate so as to pump sewage to be treated into the anaerobic pool 3, the circuit is disconnected when the first manual switch 105 is turned off, and the water inlet pump 1 stops operating.
A second circuit for controlling the first fan 6, when an automatic control switch is selected, the whole circuit comprises a second automatic switch 203, a second contactor 201 and a second relay 202 which are sequentially connected in series, when the second automatic switch 203 is opened, the whole circuit is communicated, the first fan 6 starts to convey air to the first aeration pipe 14, and when the second automatic switch 203 is closed, the first fan 6 stops running; when the manual switch control is selected, the whole circuit comprises a second manual switch 204, a second contactor 201 and a second relay 202 which are sequentially connected in series, when the second manual switch 204 is manually opened, the circuit is connected, the first fan 6 starts to convey air to the first aeration pipe 14, when the second manual switch 204 is closed, the circuit is disconnected, and the first fan 6 stops running.
A third circuit for controlling the second fan 8, when an automatic control switch is selected, the whole circuit comprises a third automatic switch 303, a third contactor 301 and a third relay 302 which are sequentially connected in series, when the third automatic switch 303 is opened, the circuit is communicated, the second fan 8 starts to convey air to the second aeration pipe 12, and when the third automatic switch 303 is closed, the second fan 8 stops running; when the manual switch is selected, the whole circuit comprises a third manual switch 304, a third contactor 301 and a third relay 302 which are sequentially connected in series, the third manual switch 304 is manually opened, the second fan 8 starts to convey air to the second aeration pipe 12, the third manual switch 304 is closed, and the second fan 8 stops running.
Example 8
The embodiment provides a sewage treatment process based on the sewage treatment device in the above embodiment, as shown in fig. 1, the sewage treatment process includes: the sewage is treated by an anaerobic tank 3, a facultative tank 4, an aerobic tank 5 and a sequencing batch activated sludge process reaction tank 10 in turn.
The sewage treatment process of the embodiment is flexibly combined with A2The O and sequencing batch activated sludge process has obviously improved nitrogen and phosphorus removal efficiency, can adapt to more complicated water quality of inlet water, ensures normal, stable and efficient operation of the system, has more obvious energy saving and consumption reduction aspects in the sewage treatment process, and can continuously and efficiently operate in the sewage treatment process.
The sewage treatment device or the sewage treatment process has the following advantages: first, investment savings, A2The O + sequencing batch active sludge process system adopts aeration and sedimentationThe sedimentation tank and the sedimentation tank have the same structure, so that a secondary sedimentation tank is omitted, the primary sedimentation tank is in place, and the total investment is saved; secondly, the control is flexible, and various processing requirements can be met, in A2When the O + sequencing batch activated sludge process is operated, the operation time, the total retention time and the air supply quantity of each stage in a period can be adjusted according to the water quality of inlet water and the water outlet requirement; thirdly, the activated sludge has good properties and low sludge yield, because of A2The O + sequencing batch activated sludge process has high organic matter concentration in the initial stage of water intake and can obtain sufficient nutrients for zoogloea bacteria inside sludge floc, so that it is favorable to the growth of zoogloea bacteria, and the sludge has compact structure and high settling performance2The operating cycle of the O + sequencing batch activated sludge process has an idle period, and the sludge is in an endogenous respiration stage, so that the yield of the sludge is lower; fourthly, the denitrification effect is good, A2The O + sequencing batch activated sludge process system can create suitable aerobic, anoxic and denitrification conditions for nitrifying bacteria and denitrifying bacteria by adjusting appropriate aeration amount, and in addition, the denitrifying bacteria can also carry out endogenous denitrification in an idle period, so that the denitrification effect is good, the removal rate of CODcr can reach 75-90%, and the removal rate of ammonia nitrogen can reach 70-85%.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. A sewage treatment device is characterized by comprising an anaerobic tank (3), a facultative tank (4), an aerobic tank (5) and a reaction tank (10) adopting a sequencing batch activated sludge process, wherein the anaerobic tank (3), the facultative tank (4), the aerobic tank (5) and the reaction tank are sequentially communicated, the upper part of the anaerobic tank (3) is communicated with the facultative tank (4), and the lower part of the facultative tank (4) is communicated with the lower part of the aerobic tank (5); the sewage treatment device further comprises a partition plate (13) arranged between the aerobic tank (5) and the sequencing batch activated sludge process reaction tank (10), an opening communicated with the aerobic tank (5) and the sequencing batch activated sludge process reaction tank (10) is formed in the upper portion of the partition plate (13), and a first decanter (71) extending towards the aerobic tank (5) is arranged at the opening.
2. The sewage treatment device according to claim 1, further comprising a water inlet pump (1) and a water inlet pipe (2), wherein two ends of the water inlet pipe (2) are respectively communicated with the water inlet pump (1) and the top of the anaerobic tank (3).
3. The wastewater treatment apparatus according to claim 1, further comprising a water outlet pipe (9) connected to an upper portion of the sequencing batch activated sludge process reaction tank (10), wherein a second decanter (72) extending toward the sequencing batch activated sludge process reaction tank (10) is connected to an opening of the water outlet pipe (9).
4. The wastewater treatment apparatus according to claim 2, further comprising a first aeration pipe (14) provided at the bottom of the aerobic tank (5), a second aeration pipe (12) provided at the bottom of the sequencing batch activated sludge process reaction tank (10), and a sludge recirculation valve (11).
5. The wastewater treatment plant according to claim 4, further comprising a first fan (6) in communication with the first aeration pipe (14) and a second fan (8) in communication with the second aeration pipe (12), respectively, wherein the first fan (6) is disposed at the top of the aerobic tank (5), and the second fan (8) is disposed at the top of the sequencing batch activated sludge process reaction tank (10).
6. The wastewater treatment plant according to claim 4, further comprising a sludge return pipe (15) disposed at the bottom of the anaerobic tank (3), the facultative tank (4), the aerobic tank (5) and the sequencing batch activated sludge process reaction tank (10).
7. The sewage treatment device according to claim 5, further comprising a first circuit for controlling the on/off of the water inlet pump (1), a second circuit for controlling the on/off of the first fan (6), and a third circuit for controlling the on/off of the second fan (8);
the first circuit comprises a first automatic switch (104), a float switch (101), a first contactor (102) and a first relay (103) which are sequentially connected in series, the first circuit further comprises a first manual switch (105), the first manual switch (105) is connected with the first automatic switch (104) and the float switch (101) in parallel, the first manual switch (105) is connected with the first contactor (102) and the first relay (103) in series, two ends of the first circuit are connected with a first power supply, and the water inlet pump (1) is connected with a second power supply through the first relay (103);
the second circuit comprises a second automatic switch (203), a second contactor (201) and a second relay (202) which are sequentially connected in series, the second circuit further comprises a second manual switch (204), the second manual switch (204) is connected with the second automatic switch (203) in parallel, the second manual switch (204) is connected with the second contactor (201) and the second relay (202) in series, two ends of the second circuit are connected with a first power supply, and the first fan (6) is connected with the second power supply through the second relay (202);
the third circuit is including third automatic switch (303), third contactor (301) and third relay (302) that establish ties in proper order, the third circuit still includes third manual switch (304), third manual switch (304) with third automatic switch (303) are parallelly connected, third manual switch (304) with third contactor (301) and third relay (302) are parallelly connected, first power is connected at the both ends of third circuit, second fan (8) are through third relay (302) connection second power.
8. A sewage treatment process based on the sewage treatment apparatus according to any one of claims 1 to 7, characterized by comprising: the sewage is treated by an anaerobic tank (3), a facultative tank (4), an aerobic tank (5) and a sequencing batch activated sludge process reaction tank (10) in turn.
CN201910731316.0A 2019-08-08 2019-08-08 Sewage treatment device and sewage treatment process Pending CN111186912A (en)

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