CN218811159U

CN218811159U - Sewage treatment system with medicine adding device

Info

Publication number: CN218811159U
Application number: CN202222890789.5U
Authority: CN
Inventors: 蒋治平; 张晨; 许娜; 安卫军
Original assignee: Shaanxi Xinhong Water Art Environmental Technology Co ltd; Beijing No 4 Municipal Construction Engineering Co Ltd
Current assignee: Shaanxi Xinhong Water Art Environmental Technology Co ltd; Beijing No 4 Municipal Construction Engineering Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-04-07
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to a sewage treatment system with a dosing device, which comprises a sewage treatment pool, a controller, an OPR tester and the dosing device; the OPR apparatus sets up in sewage treatment pond for detect the OPR numerical value of sewage, the controller is connected with OPR apparatus and charge device respectively, and when OPR numerical value is less than and predetermines the index range, control charge device puts in the medicament to sewage treatment pond, with the phosphorus content that reduces in the sewage. Content through OPR in the sewage of OPR apparatus survey sewage treatment pond, come the phosphorus in the aquatic after the accurate reaction processing as the phosphorus content index parameter of water to reach the requirement based on OPR's index, the content that can affirm the phosphorus in aquatic when OPR numerical value is less than predetermineeing the index range exceeds standard, then control charge device and put into the medicament in to the sewage treatment pond, in order further to carry out the dephosphorization operation to sewage, with this input medicament volume of the medicament that realizes the accurate control sewage, avoid the medicament to put in too much or the not good problem of water treatment effect that leads to too little.

Description

Sewage treatment system with medicine adding device

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment system with a dosing device.

Background

At present, most urban sewage treatment plants usually adopt a biological phosphorus removal method to remove phosphorus during sewage treatment so as to treat sewage into water meeting the water quality requirement. However, detection finds that water treated by a biological phosphorus removal method cannot stably meet the water quality requirement of primary effluent, and auxiliary chemical phosphorus removal is needed for further phosphorus removal, namely, phosphorus removal is realized by adding a phosphorus removal agent into sewage.

However, when chemical phosphorus removal is performed on sewage, if the addition of a phosphorus removal agent is insufficient, the total phosphorus in the treated water exceeds the standard; if the phosphorus removal agent is excessively added, the amount of chemical sludge is increased, the agent is wasted, the energy consumption of the subsequent sludge dewatering link is increased, and the water treatment effect is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a sewage treatment system having a dosing device.

The utility model provides a sewage treatment system with a dosing device, which comprises a sewage treatment tank, a controller, an OPR tester and the dosing device;

the sewage treatment tank is provided with a treatment inlet for sewage to enter, a medicament inlet for a medicament to enter and a treatment outlet for treated water to discharge, the dosing device is provided with a medicament outlet for the medicament to discharge, and the medicament outlet is communicated with the medicament inlet; the OPR apparatus sets up in the sewage treatment pond for detect the OPR numerical value of sewage in the sewage treatment pond, the controller respectively with the OPR apparatus with charge device connects, with when OPR numerical value is less than preset index range, control charge device to the medicine is put in the sewage treatment pond to reduce the phosphorus content in the sewage.

According to an embodiment of the present disclosure, the sewage treatment pond includes two at least processing ponds that communicate in proper order, is provided with on the one that is close to the upstream side in two at least processing ponds the processing entry, two at least be provided with on the one that is close to the downstream side in the processing pond and handle the export, and each all be provided with one in the processing pond the OPR apparatus, all the OPR apparatus all with the controller is connected.

According to an embodiment of the present disclosure, the at least two treatment tanks include an anaerobic treatment tank, an anoxic treatment tank, a primary aerobic tank, and a secondary aerobic tank, which are sequentially communicated, and the treatment inlet is disposed on the anaerobic treatment tank, and the treatment outlet is disposed on the secondary aerobic tank.

According to an embodiment of this disclosure, charge device is in including adding the medicine casing and setting add the medicine pump in the medicine casing, the medicament export sets up add on the medicine casing, add the medicine pump with the controller is connected, the controller is used for the OPR numerical value is less than when predetermineeing the index range control add the medicine pump and open, with to put in the medicament in the sewage treatment pond.

According to an embodiment of this disclosure, charge device is located the top in sewage treatment pond, just the medicament exit be provided with the input medicament pipe of medicament entry intercommunication.

According to an embodiment of the present disclosure, the sewage treatment system with a dosing device further comprises an adjusting tank and a lift pump arranged in the adjusting tank, the adjusting tank is provided with a sewage inlet for sewage to enter and a sewage outlet for sewage to discharge, and the sewage outlet is communicated with the treatment inlet.

According to an embodiment of the present disclosure, the sewage treatment system with a dosing device further comprises a first water quality detector, the first water quality detector is disposed in the regulating reservoir, and the first water quality detector is connected with the controller and used for detecting a water quality value of sewage in the regulating reservoir.

According to an embodiment of the present disclosure, the sewage treatment system with a dosing device further comprises a second water quality detector, wherein the second water quality detector is arranged in the sewage treatment tank and is used for detecting the water quality value of the sewage in the sewage treatment tank.

According to an embodiment of the present disclosure, the second water quality detector is located in the sewage treatment tank at a position close to the treatment outlet.

According to an embodiment of this disclosure, sewage treatment system with charge device still includes the sedimentation tank, the sedimentation tank has deposit entry and deposit the export, deposit the entry with handle the export intercommunication, so that the water after the processing of sewage treatment pond is in deposit in the sedimentation tank after the export discharge through depositing.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the utility model provides a sewage treatment system with a dosing device, which comprises a sewage treatment pool, a controller, an OPR tester and the dosing device; the sewage treatment tank is provided with a treatment inlet for sewage to enter, a medicament inlet for a medicament to enter and a treatment outlet for treated water to discharge, the dosing device is provided with a medicament outlet for the medicament to discharge, and the medicament outlet is communicated with the medicament inlet; the OPR apparatus sets up in sewage treatment pond for detect the OPR numerical value of the sewage in the sewage treatment pond, the controller is connected with OPR apparatus and charge device respectively, and when OPR numerical value is less than and predetermines the index range, control charge device puts in the medicament to the sewage treatment pond, with the phosphorus content that reduces in the sewage. That is to say, this sewage treatment system with charge device that this disclosure provided, content through the OPR in the sewage in the OPR apparatus survey sewage treatment pond, and come whether to reach the requirement as the phosphorus content index parameter of water whether the phosphorus in the aquatic after the accurate reaction treatment based on the index of OPR, and the content that can deem the phosphorus in aquatic when OPR numerical value is less than predetermineeing the index range exceeds standard, then control charge device puts into the medicament in to the sewage treatment pond, in order further to carry out the dephosphorization operation to sewage, with this input medicament volume of the medicament that realizes the accurate control in the sewage, avoid the medicament to put in too much or the not good problem of water treatment effect that leads to too little.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a sewage treatment system with a dosing device according to an embodiment of the present disclosure.

Wherein, 1, a sewage treatment tank; 11. a process inlet; 12. a medicament inlet; 13. an anaerobic treatment tank; 14. an anoxic treatment tank; 15. a primary aerobic tank; 16. a secondary aerobic tank; 2. a controller; 3. an OPR meter; 4. a dosing device; 41. a medicament outlet; 42. a dosing shell; 5. a regulating reservoir; 51. a sewage inlet; 52. a sewage outlet; 6. a lift pump; 7. a first water quality detector; 8. a second water quality detector; 9. a sedimentation tank; 91. and a sediment outlet.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Referring to fig. 1, the present embodiment provides a sewage treatment system with a dosing device, which includes a sewage treatment tank 1, a controller 2, an OPR meter 3 (oxidation-reduction potential), and a dosing device 4.

Wherein, the sewage treatment tank 1 is provided with a treatment inlet 11 for sewage to enter, a medicament inlet 12 for medicament to enter and a treatment outlet for treated water to discharge, the dosing device 4 is provided with a medicament outlet 41 for medicament to discharge, and the medicament outlet 41 is communicated with the medicament inlet 12; OPR apparatus 3 sets up in sewage treatment pond 1 for detect the OPR numerical value of the sewage in the sewage treatment pond 1, controller 2 is connected with OPR apparatus 3 and charge device 4 respectively, and when OPR numerical value is less than preset index range, control charge device 4 to 1 input medicament in sewage treatment pond, with the phosphorus content in the reduction sewage.

Illustratively, when the OPR value detected by the OPR meter 3 is smaller than the preset index range, it indicates that the content of phosphorus in the wastewater exceeds the standard, and at this time, the chemical adding device 4 is continuously controlled to add chemical into the wastewater treatment tank 1, so as to further remove phosphorus by the chemical until the OPR value detected by the OPR meter 3 in the wastewater treatment tank 1 is within the preset index range.

For example, the agent in the present embodiment is mainly a phosphorus removal agent for removing phosphorus, and may also include a nitrogen removal agent for removing nitrogen, and specifically, the agent with the corresponding function may also be selected according to actual needs.

It should be noted that, in this embodiment, a water quality index ORP (oxidation-reduction potential) is used as a single control point, and a reaction process of each stage of sewage treatment is represented by an oxidation-reduction potential (ORP), so as to control the addition of the chemical.

The principle of selecting OPR to represent whether the content of phosphorus in water meets a preset index is as follows: due to the existence of various valence-variable ions and dissolved oxygen in the sewage, namely a plurality of redox couples. Through the ORP apparatus, the oxidation-reduction potential in the sewage can be detected in a short time, the sampling measurement carried out by a laboratory is not needed, the testing process can be greatly shortened in time, and the working efficiency is improved. Important oxidation-reduction reactions in a sewage treatment system with a dosing device include biodegradation of organic pollutants containing carbon, nitrogen, phosphorus and the like, hydrolysis and acidification of organic matters, nitration and denitrification reactions, biological anaerobic phosphorus release, aerobic phosphorus absorption and the like. Thus, this example chose to determine the OPR value to indirectly react the phosphorus content of the water.

In addition, by monitoring and managing the ORP meter of the sewage, the manager can artificially control the biological reaction to occur. By changing the environmental conditions under which the process is run, such as: increasing aeration quantity, increasing dissolved oxygen concentration, adding oxidizing substances and other measures to improve oxidation-reduction potential; the aeration quantity is reduced to reduce the dissolved oxygen concentration, and the carbon source and the reducing substance are added to reduce the oxidation-reduction potential, so that the reaction is promoted or prevented.

Therefore, by using the ORP value as a control parameter in the aerobic biological treatment, the anoxic biological treatment and the anaerobic biological treatment, a better treatment effect can be achieved.

That is to say, the sewage treatment system with charge device that this embodiment provided, through the OPR content of the OPR in the sewage treatment pond 1 of OPR apparatus 3 survey, and whether the phosphorus in the aquatic after the accurate reaction processing reaches the requirement as the phosphorus content index parameter of water based on the index of OPR, and the content of the phosphorus in the aquatic can be affirmed when OPR numerical value is less than preset index range exceeds standard, then control charge device 4 and put into the medicament in to sewage treatment pond 1, in order further to carry out dephosphorization operation to sewage, with this input medicament volume of the medicament in the realization accurate control sewage, avoid the medicament to put in too much or too little not good problem of water treatment effect that leads to.

Referring to fig. 1, in some embodiments, the wastewater treatment tank 1 includes at least two treatment tanks connected in series, one of the at least two treatment tanks near the upstream side is provided with a treatment inlet 11, one of the at least two treatment tanks near the downstream side is provided with a treatment outlet, and each treatment tank is provided with one OPR meter 3, and all the OPR meters 3 are connected to the controller 2.

That is to say, the sewage treatment tank 1 of this embodiment can all set up an OPR apparatus 3 in each treatment tank when setting up two at least treatment tanks to the realization carries out OPR numerical measurement to the sewage in each treatment tank, with the water of judging in the corresponding treatment tank whether satisfy the water quality requirement.

For example, the treatment tanks may be arranged in two or three or four or more than four, depending on the sewage treatment requirements.

In this embodiment, referring to fig. 1, the number of the treatment tanks is 4, and for example, the treatment tanks may include an anaerobic treatment tank 13, an anoxic treatment tank 14, a primary aerobic tank 15, and a secondary aerobic tank 16, which are sequentially connected, wherein the treatment inlet 11 is disposed on the anaerobic treatment tank 13, and the treatment outlet is disposed on the secondary aerobic tank 16.

The specific redox potentials required by the microorganisms in the different treatment basins are different, and examples are as follows:

the aerobic microorganisms can grow above +100mV, and the optimum is +300 to +400mV; facultative anaerobes perform aerobic respiration when the facultative anaerobes are above +100mV and perform anaerobic respiration when the facultative anaerobes are below +100 mV; the obligate anaerobic bacteria is required to be-200 to-250 mV, wherein the obligate anaerobic methanogen is required to be-300 to-400 mV, and the optimum is-330 mV.

Referring to fig. 1, in some embodiments, the dosing device 4 includes a dosing housing 42 and a dosing pump disposed in the dosing housing 42, the drug outlet 41 is disposed on the dosing housing 42, the dosing pump is connected to the controller 2, and the controller 2 is configured to control the dosing pump to be turned on when the OPR value is smaller than a preset index range, so as to dose the drug into the wastewater treatment tank 1.

In a specific implementation, the drug outlet 41 may be disposed at the bottom of the dosing housing 42, so that the drug in the dosing housing 42 is discharged into the sewage treatment tank 1 through the drug outlet 41. The dosing pump is used to provide a negative pressure to cause the medicament within the dosing housing 42 to be rapidly expelled from the medicament outlet 41.

Specifically, the chemical adding device 4 is located above the sewage treatment tank 1, and a chemical feeding pipe communicated with the chemical inlet 12 is arranged at the chemical outlet 41. Illustratively, the tube body for delivering the medicament can be a plastic hose or an alloy tube.

In some embodiments, referring to fig. 1, the sewage treatment system with a dosing device further comprises a regulating tank 5 and a lift pump 6 arranged in the regulating tank 5, wherein the regulating tank 5 is provided with a sewage inlet 51 for sewage to enter and a sewage outlet 52 for sewage to exit, and the sewage outlet 52 is communicated with the treatment inlet 11.

That is, the external wastewater first enters the adjusting tank 5 through the wastewater inlet 51 and then is discharged into the wastewater treatment tank 1 through the wastewater outlet 52, i.e., the adjusting tank 5 is located at the upstream side of the wastewater treatment tank 1.

In some embodiments, referring to fig. 1, the sewage treatment system with a dosing device further includes a first water quality detector 7, the first water quality detector 7 is disposed in the adjusting tank 5, and the first water quality detector 7 is connected to the controller 2 and is configured to detect a water quality value of the sewage in the adjusting tank 5, so as to control the dosing amount of the dosing device 4 to the sewage treatment tank 1 according to the water quality value and avoid too much or too little dosing from affecting the water treatment effect.

In some embodiments, referring to fig. 1, the sewage treatment system with a dosing device further includes a second water quality detector 8, and the second water quality detector 8 is disposed in the sewage treatment tank 1 and is used for detecting a water quality value of the sewage in the sewage treatment tank 1, so as to control the dosing amount of the dosing device 4 to the agent in the sewage treatment tank 1 according to the water quality value and avoid too much or too little dosing from affecting the water treatment effect.

During the concrete implementation, second water quality testing appearance 8 is located the position that is close to the processing export in sewage treatment pond 1 to whether the content of the phosphorus of the aquatic after the accurate detection is handled through sewage treatment pond 1 satisfies the requirement.

Referring to fig. 1, in some embodiments, the sewage treatment system with a chemical adding device further includes a sedimentation tank 9, the sedimentation tank 9 has a sedimentation inlet and a sedimentation outlet 91, the sedimentation inlet is communicated with the treatment outlet, so that the water treated by the sewage treatment tank 1 is precipitated in the sedimentation tank 9 and then discharged through the sedimentation outlet 91, and the water treated by the sewage treatment tank 1 is discharged from the sedimentation outlet 91 after the pollutants are precipitated, so as to produce the water meeting the water quality requirement.

Specifically, the process that sewage treatment was carried out to sewage treatment system with charge device that this embodiment provided is: the sewage enters the regulating tank 5 through a pipe network and is lifted to the sewage treatment tank 1 by the lifting pump 6 for treatment. Wherein, a first water quality detector 7 is arranged in the adjusting tank 5 and is used for measuring the water quality index of the inlet water.

More specifically, the treatment process of the sewage in the sewage treatment tank 1 is as follows:

the sewage after being lifted by the lifting pump 6 in the adjusting tank 5 firstly enters an anaerobic tank for anaerobic phosphorus release reaction, and the ORP value is reduced when reducing substances are generated in the anaerobic reaction process; conversely, the reduction in reducing species increases the ORP value and stabilizes over a period of time.

And then, the water treated by the anaerobic tank enters an anoxic tank for denitrification, and the ORP and the nitrogen concentration in the denitrification state have certain correlation in the anoxic biological treatment process and can be used as a standard for judging whether the denitrification process is finished. Relevant practice shows that in the denitrification process, the reaction is more complete when the derivative of ORP with time is < -5.

And then, the water treated by the anoxic tank sequentially enters the first-stage aerobic tank 15 and the second-stage aerobic tank 16 to carry out nitrification, aerobic phosphorus absorption, organic matter degradation and other reactions, the removal of ORP and nitrification have good correlation, and the aerobic aeration amount is controlled by ORP, so that the shortage or excess of aeration time can be avoided, and the quality of treated water is ensured.

During specific implementation, ORP measuring instruments are arranged in the anaerobic tank, the anoxic tank, the primary aerobic tank 15 and the secondary aerobic tank 16, and ORP data of biological reaction stages (in the anaerobic tank, the anoxic tank, the primary aerobic tank 15 and the secondary aerobic tank 16) under the set values are measured by combining with the set values of medicament adding concentration under different water inlet conditions.

Such as: under the set value of the adding concentration of the medicament, the ORP value of the water in the anaerobic tank is-100 mV to-250 mV, and the biological anaerobic phosphorus release process is mainly carried out in the anaerobic tank; the ORP value of the water in the anoxic tank is +50 mV to-50 mV, and the denitrification process is mainly carried out in the anoxic tank; the ORP value of the water in the first aerobic tank and the second aerobic tank 16 is +50 mV to +250mV, and the processes of nitration reaction, aerobic degradation of organic matters and phosphorus absorption of aerobic organisms are mainly carried out.

Specifically, the data collected by the first water quality detector 7, the second numerical value detector and the ORP measuring instrument are transmitted to the controller 2 through the data collection module, and after data analysis, the controller 2 controls the dosing pump to operate.

Specifically, in the subsequent biological treatment process, only the ORP value needs to be measured on line, the ORP value is compared with the ORP value of each reaction section under the set value of the concentration of the medicament, and whether the dosage is adjusted or not is judged by combining the effluent quality value measured by the first water quality detector 7 and the first water quality detector 8. If the dosage is within the index range, adding the medicament according to the set dosage; if the error range is exceeded, the dosage is adjusted in time through comparative analysis. Such as: when the ORP value of the water in the anaerobic tank exceeds a set range, the phosphorus release reaction of anaerobic organisms in the stage is not thorough enough, the biological phosphorus removal in the aerobic stage is influenced, and the adding amount of a phosphorus removal agent is increased; when the ORP value of the water in the anoxic tank exceeds the set range, the denitrification is not completely performed at the stage, and the carbon source adding amount is increased in time probably due to insufficient carbon source.

Finally, the biochemically treated sewage, organic pollutants and nitrogen and phosphorus pollutants are well removed, chemical agents can be added at the tail end of the secondary aerobic tank 16 to form flocs, and the flocs enter the sedimentation tank 9 along with the sewage for sedimentation treatment so as to further remove the pollutants.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sewage treatment system with a dosing device is characterized by comprising a sewage treatment tank (1), a controller (2), an OPR tester (3) and a dosing device (4);

the sewage treatment tank (1) is provided with a treatment inlet (11) for sewage to enter, a medicament inlet (12) for medicament to enter and a treatment outlet for treated water to discharge, the dosing device (4) is provided with a medicament outlet (41) for medicament to discharge, and the medicament outlet (41) is communicated with the medicament inlet (12);

OPR apparatus (3) set up in sewage treatment pond (1), be used for detecting the OPR numerical value of the sewage in sewage treatment pond (1), controller (2) respectively with OPR apparatus (3) with charge device (4) are connected, with when OPR numerical value is less than predetermineeing the index range, control charge device (4) to sewage treatment pond (1) is put in the medicament to reduce the phosphorus content in the sewage.

2. The wastewater treatment system with a dosing device according to claim 1, wherein the wastewater treatment tank (1) comprises at least two treatment tanks connected in series, one of the at least two treatment tanks near the upstream side is provided with the treatment inlet (11), one of the at least two treatment tanks near the downstream side is provided with a treatment outlet, and each of the treatment tanks is provided with one of the OPR meters (3), and all the OPR meters (3) are connected with the controller (2).

3. The sewage treatment system with a dosing device according to claim 2, wherein at least two treatment tanks comprise an anaerobic treatment tank (13), an anoxic treatment tank (14), a primary aerobic tank (15) and a secondary aerobic tank (16) which are communicated in sequence, and the treatment inlet (11) is arranged on the anaerobic treatment tank (13) and the treatment outlet is arranged on the secondary aerobic tank (16).

4. The wastewater treatment system with a dosing device according to claim 1, wherein the dosing device (4) comprises a dosing housing (42) and a dosing pump disposed in the dosing housing (42), the drug outlet (41) is disposed on the dosing housing (42), the dosing pump is connected to the controller (2), and the controller (2) is configured to control the dosing pump to be turned on when the OPR value is smaller than the preset index range, so as to dose the drug into the wastewater treatment tank (1).

5. The wastewater treatment system with a dosing device according to claim 4, characterized in that the dosing device (4) is located above the wastewater treatment tank (1), and a dosing agent pipe communicated with the agent inlet (12) is arranged at the agent outlet (41).

6. The sewage treatment system with a dosing device according to any one of claims 1 to 5, further comprising a regulating tank (5) and a lift pump (6) arranged in the regulating tank (5), wherein the regulating tank (5) is provided with a sewage inlet (51) for sewage to enter and a sewage outlet (52) for sewage to discharge, and the sewage outlet (52) is communicated with the treatment inlet (11).

7. The sewage treatment system with the dosing device according to claim 6, further comprising a first water quality detector (7), wherein the first water quality detector (7) is arranged in the adjusting tank (5), and the first water quality detector (7) is connected with the controller (2) and is used for detecting the water quality value of the sewage in the adjusting tank (5).

8. The sewage treatment system with the dosing device according to any one of claims 1 to 5, further comprising a second water quality detector (8), wherein the second water quality detector (8) is arranged in the sewage treatment tank (1) and is used for detecting the water quality value of the sewage in the sewage treatment tank (1).

9. The wastewater treatment system with dosing device according to claim 8, characterized in that the second water quality detector (8) is located inside the wastewater treatment tank (1) near the treatment outlet.

10. The wastewater treatment system with the dosing device according to any one of claims 1 to 5, further comprising a sedimentation tank (9), wherein the sedimentation tank (9) has a sedimentation inlet and a sedimentation outlet (91), and the sedimentation inlet is communicated with the treatment outlet, so that the water treated by the wastewater treatment tank (1) is discharged through the sedimentation outlet (91) after being precipitated in the sedimentation tank (9).