Wastewater treatment system

Abstract

The utility model relates to a wastewater treatment system, which comprises: a homogeneous hydrolysis tank, the homogeneous hydrolysis tank is communicated with a first output pipeline and a second output pipeline, the first output pipeline is provided with a first valve, and the second output pipeline is provided with a second valve; the anaerobic tank is communicated with the first output pipeline; the first-stage A / O tank is communicated with the first output pipeline, the first-stage A / O tank is communicated with the second output pipeline, a third output pipeline is communicated between the first-stage A / O tank and the anaerobic tank, and a third valve is mounted on the third output pipeline. The wastewater treatment system ingeniously divides wastewater into two parts for treatment. Half of the wastewater enters the anaerobic tank, and the chemical oxygen demand (COD) in the wastewater is effectively removed by utilizing the degradation effect of anaerobic microorganisms. And the other half of wastewater directly enters the first-stage A / O tank in an overrunning manner, so that the split-flow treatment of the wastewater is realized, and the overall treatment efficiency is improved. A third valve is arranged, so that the wastewater directly entering the first-stage A / O tank in an overrunning manner is supplemented as a carbon source.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wastewater treatment, in particular to a nitro compound wastewater treatment system. BACKGROUND

[0002] Nitro compounds are widely used in organic synthesis, medicine, agriculture, explosives and chemical industry. The wastewater produced in the production of nitro compounds is toxic and difficult to degrade. Once it enters the soil, water and air environment, it will cause serious environmental pollution, affect the self-purification ability of water body and pose a threat to human health. Due to the difficulty and toxicity of nitro compound wastewater, special attention should be paid to prevent secondary pollution and ensure treatment effect during the treatment process to protect the environment and human health.

[0003] In the related art, in the traditional treatment of nitro compound wastewater, the wastewater is directly introduced into an anaerobic tank for chemical oxygen demand (COD) degradation, and then all the wastewater is introduced into an anoxic-oxic activated sludge process (A / O tank) for further biological treatment. In this process, the A / O tank usually needs to add additional carbon sources such as glucose to maintain the activity of microorganisms, which increases the treatment cost. SUMMARY

[0004] The present application provides a wastewater treatment system, which can solve the technical problem that in the traditional treatment of nitro compound wastewater, the A / O tank usually needs to add additional carbon sources such as glucose to maintain the activity of microorganisms, which increases the treatment cost.

[0005] The present application provides a wastewater treatment system, which can solve the technical problem that in the traditional treatment of nitro compound wastewater, the A / O tank usually needs to add additional carbon sources such as glucose to maintain the activity of microorganisms, which increases the treatment cost.

[0006] The homogenizing hydrolysis tank is communicated with a first output pipeline and a second output pipeline, the first output pipeline is installed with a first valve, and the second output pipeline is installed with a second valve.

[0007] The anaerobic tank is communicated with the first output pipeline.

[0008] The first-stage A / O tank is communicated with the second output pipeline, and a third output pipeline is communicated between the first-stage A / O tank and the anaerobic tank, and the third output pipeline is installed with a third valve.

[0009] In one embodiment, the first-stage A / O tank comprises a first anoxic tank and a first oxic tank communicated with the first anoxic tank, the homogenizing hydrolysis tank is communicated with the first anoxic tank through the second output pipeline, and the anaerobic tank is communicated with the first anoxic tank through the third output pipeline.

[0010] In one embodiment, the wastewater treatment system further comprises:

[0011] A secondary A / O tank, a fifth output pipeline is communicated with the first aerobic tank, and a fifth valve is installed on the fifth output pipeline.

[0012] In one embodiment, the wastewater treatment system further comprises:

[0013] A sludge sedimentation tank, a fourth output pipeline is communicated between the primary A / O tank and the sludge sedimentation tank, and a fourth valve is installed on the fourth output pipeline.

[0014] In one embodiment, a first activated sludge pipeline is communicated between the sludge sedimentation tank and the homogeneous hydrolysis tank, and a first activated sludge control valve is installed on the first activated sludge pipeline.

[0015] In one embodiment, the wastewater treatment system further comprises:

[0016] An adjustment tank, a sixth output pipeline is communicated between the homogeneous hydrolysis tank and the adjustment tank, and a sixth valve is installed on the sixth output pipeline.

[0017] In one embodiment, the adjustment tank is communicated with a wastewater input pipeline.

[0018] In one embodiment, a second activated sludge pipeline is communicated between the sludge sedimentation tank and the adjustment tank, and a second activated sludge valve is installed on the second activated sludge pipeline.

[0019] In one embodiment, the homogeneous hydrolysis tank is installed with a first submersible mixer.

[0020] In one embodiment, the anaerobic tank is installed with a second submersible mixer.

[0021] The technical scheme provided by the embodiments of the present application has the beneficial effects of:

[0022] The wastewater treatment system ingeniously divides the wastewater into two parts for treatment. Half of the wastewater first enters the anaerobic tank through the first output pipeline and the first valve, and effectively removes the chemical oxygen demand in the wastewater by using the degradation of anaerobic microorganisms, thereby reducing the burden on the subsequent treatment unit. The other half of the wastewater directly "skips" into the primary A / O tank through the second output pipeline and the second valve. Through the flexible adjustment of the first valve and the second valve, the amount of wastewater entering the anaerobic tank and the primary A / O tank can be accurately controlled, realizing the shunt treatment of wastewater and improving the overall treatment efficiency. The third valve is set so that the wastewater directly "skipping" into the primary A / O tank as a carbon source supplement is mixed with the wastewater treated by the anaerobic tank, further promoting the growth and activity of aerobic microorganisms, thereby enhancing the removal effect of nitrogen, phosphorus and other pollutants. BRIEF DESCRIPTION OF DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a wastewater treatment system.

[0025] In the diagram: 1. Homogenizing hydrolysis tank; 2. First output pipeline; 3. Second output pipeline; 4. Anaerobic tank; 5. Primary A / O tank; 6. Third output pipeline; 7. Sludge sedimentation tank; 8. Fourth output pipeline; 9. Secondary A / O tank; 10. Fifth output pipeline; 11. First activated sludge pipeline; 12. Equalization tank; 13. Sixth output pipeline; 14. Second activated sludge pipeline; 15. Wastewater input pipeline. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0027] This application provides a wastewater treatment system that can solve the technical problem in traditional nitro compound wastewater treatment where the A / O tank usually requires the addition of carbon sources such as glucose to maintain the activity of microorganisms, which increases the treatment cost.

[0028] like Figure 1 As shown in the embodiment of this application, a wastewater treatment system includes: a homogenizing hydrolysis tank 1, which is connected to a first output pipeline 2 and a second output pipeline 3. The first output pipeline 2 is equipped with a first valve, and the second output pipeline 3 is equipped with a second valve; an anaerobic tank 4, which is connected to the first output pipeline 2; a primary A / O tank 5, which is connected to the second output pipeline 3. A third output pipeline 6 connects the primary A / O tank 5 and the anaerobic tank 4, and the third output pipeline 6 is equipped with a third valve.

[0029] In this embodiment, the homogenizing hydrolysis tank 1 serves as the preliminary stage of wastewater treatment. It is used to mix and homogenize the wastewater, making the distribution of pollutants more uniform, and decomposing part of the organic matter through hydrolysis, thereby improving the biodegradability of the wastewater. By setting the first and second output pipelines 2 and 3, and installing the first and second valves respectively, the system can flexibly divide the wastewater into two parts for treatment. This split-flow design increases the flexibility and efficiency of the treatment. The anaerobic tank 4 is connected to the first output pipeline 2, and half of the wastewater enters the anaerobic tank 4. Under anaerobic conditions, the degradation of anaerobic microorganisms effectively removes the chemical oxygen demand and other organic matter in the wastewater. The first-stage A / O tank 5 is connected to the second output pipeline 3, and the other half of the wastewater directly enters the first-stage A / O tank 5. This combines anaerobic and aerobic treatment processes to further decompose organic matter and remove nitrogen, phosphorus, and other pollutants. At the same time, this part of the wastewater also provides the necessary carbon source for the A / O tank. The third output pipeline 6 connects the anaerobic tank 4 and the first-stage A / O tank 5 through the third valve. By adjusting the third valve, the mixing ratio and flow of wastewater in the two treatment units can be optimized, further improving the treatment effect. Split-flow treatment and valve adjustment enable the system to flexibly adjust according to the wastewater quality and treatment requirements, optimizing the distribution and flow of wastewater in each treatment unit, thereby improving the overall treatment efficiency. By combining homogenizing hydrolysis, anaerobic treatment, and first-stage A / O treatment technologies, the system can more comprehensively remove pollutants in the wastewater, including organic matter, nitrogen, phosphorus, and other pollutants, improving the quality of the effluent. The by-products such as biogas produced in the anaerobic tank 4 can be recycled and utilized as energy, achieving resource recycling and sustainable development. At the same time, useful components in the effluent after the first-stage A / O tank 5 treatment can also be recycled and utilized.

[0030] Specifically, the wastewater treatment system ingeniously divides the wastewater into two parts for treatment. Half of the wastewater first enters the anaerobic tank 4 through the first output pipeline 2 and the first valve, using the degradation of anaerobic microorganisms to effectively remove the chemical oxygen demand in the wastewater, reducing the burden on subsequent treatment units. The other half of the wastewater directly "skips" into the first-stage A / O tank 5 through the second output pipeline 3 and the second valve. Through flexible adjustment of the first and second valves, the amount of wastewater entering the anaerobic tank 4 and the first-stage A / O tank 5 can be accurately controlled, realizing split-flow treatment and improving overall treatment efficiency. The setting of the third valve allows the wastewater that directly "skips" into the first-stage A / O tank 5 to serve as a carbon source supplement, mixing with the wastewater treated by the anaerobic tank 4, further promoting the growth and activity of aerobic microorganisms, thereby enhancing the removal effect of nitrogen, phosphorus, and other pollutants.

[0031] In one embodiment, as shown in Figure 1 the wastewater treatment system further comprises a sludge sedimentation tank 7, and a fourth output pipeline 8 is connected between the sludge sedimentation tank 7 and the first-stage A / O tank 5, and the fourth output pipeline 8 is provided with a fourth valve.

[0032] In this embodiment, the sludge sedimentation tank 7 is an important part of the wastewater treatment system, which is used to separate and precipitate suspended solids and sludge in wastewater. Through the precipitation effect, the solid particles in the wastewater can be further reduced, and the clarity and quality of the effluent can be improved. The fourth output pipeline 8 connects the first A / O tank 5 and the sludge sedimentation tank 7, so that the wastewater treated by the first A / O tank 5 can flow into the sludge sedimentation tank 7 for further treatment. The fourth valve is installed on the fourth output pipeline 8, which is used to control the flow and flow direction of the wastewater. By adjusting the fourth valve, the residence time and treatment effect of the wastewater in the sludge sedimentation tank 7 can be flexibly adjusted.

[0033] In an embodiment, as shown in Figure 1 The wastewater treatment system further comprises: a secondary A / O tank 9, the secondary A / O tank 9 is communicated with the first A / O tank 5 through a fifth output pipeline 10, the fifth output pipeline 10 is installed with a fifth valve, and the secondary A / O tank 9 is communicated with the fourth output pipeline 8.

[0034] In this embodiment, the secondary A / O tank 9 is used to further remove organic matter, nitrogen, phosphorus and other pollutants in wastewater. Through the treatment of the secondary A / O tank 9, the biological stability and chemical stability of the effluent can be improved, and higher discharge standards or reuse water requirements can be met. The fifth output pipeline 10 connects the first A / O tank 5 and the secondary A / O tank 9, so that the wastewater treated by the first A / O tank 5 can flow into the secondary A / O tank 9 for further treatment. The fifth valve is installed on the fifth output pipeline 10, which is used to control the flow and flow direction of the wastewater. By adjusting the fifth valve, the treatment amount of wastewater in the secondary A / O tank 9 can be flexibly adjusted. In addition to receiving the wastewater of the first A / O tank 5 through the fifth output pipeline 10, the secondary A / O tank 9 is also communicated with the fourth output pipeline 8, which means that the wastewater treated by the secondary A / O tank 9 can be discharged to the sludge sedimentation tank 7.

[0035] In an embodiment, as shown in Figure 1 The sludge sedimentation tank 7 is communicated with the homogeneous hydrolysis tank 1 through a first activated sludge pipeline 11, and the first activated sludge control valve is installed on the first activated sludge pipeline 11.

[0036] In this embodiment, the first activated sludge pipeline 11 connects the activated sludge rich in microorganisms in the sludge sedimentation tank 7 with the homogenization hydrolysis tank 1. Through this pipeline, activated sludge can be backflowed to the homogenization hydrolysis tank 1, providing a constant source of microbial power for subsequent wastewater treatment processes. The first activated sludge control valve can flexibly adjust the backflow volume and flow rate of sludge according to actual needs. This precise control not only ensures efficient use of sludge, but also avoids the decline in treatment efficiency caused by excessive or insufficient sludge. The backflow activated sludge contains a large number of microbial communities, which can rapidly reproduce and recover activity in the homogenization hydrolysis tank 1. These microorganisms continuously decompose organic matter in wastewater, thereby improving the biodegradability and treatment efficiency of wastewater. Through the backflow and reuse of sludge, resource recycling is achieved. This not only reduces waste production and dependence on external resources, but also reduces treatment costs, in line with the concept of sustainable development.

[0037] In one embodiment, as shown in Figure 1 The wastewater treatment system further comprises a conditioning tank 12, a sixth output pipeline 13 communicating between the conditioning tank 12 and the homogenization hydrolysis tank 1, and a sixth valve installed on the sixth output pipeline 13.

[0038] In this embodiment, the conditioning tank 12 plays an important role in the wastewater treatment system, mainly serving as a balancing and conditioning role for wastewater flow and water quality. It can preliminarily mix and homogenize the wastewater before it enters the treatment system, thereby ensuring the stable operation of the subsequent treatment units. The sixth output pipeline 13 is a bridge connecting the conditioning tank 12 and the homogenization hydrolysis tank 1, which allows the wastewater treated by the conditioning tank 12 to smoothly flow into the homogenization hydrolysis tank 1 for further treatment. The sixth valve is installed on the sixth output pipeline 13 and plays a key role in flow and flow direction control. By flexibly adjusting the opening of the valve, the flow rate and flow rate of the wastewater can be accurately controlled to meet different treatment needs.

[0039] In one embodiment, as shown in Figure 1 The wastewater treatment system further comprises a sludge sedimentation tank 7, a second activated sludge pipeline 14 communicating between the sludge sedimentation tank 7 and the conditioning tank 12, and a second activated sludge valve installed on the second activated sludge pipeline 14.

[0040] In this embodiment, the second activated sludge pipeline 14 is a key connection channel that realizes the direct communication between the sludge settling tank 7 and the adjustment tank 12. Through this pipeline, the activated sludge precipitated in the sludge settling tank 7 can be effectively refluxed to the adjustment tank 12 for further utilization and treatment. The second activated sludge valve is installed on the second activated sludge pipeline 14, which has precise control function. By adjusting the opening of the valve, the reflux amount and flow rate of activated sludge can be flexibly controlled to meet the different needs of the wastewater treatment system. Through the second activated sludge pipeline 14, the activated sludge in the sludge settling tank 7 can be effectively refluxed to the adjustment tank 12 for use as inoculated sludge. This significantly improves the utilization rate of sludge, reduces the dosage of new sludge, and thus reduces the treatment cost. At the same time, the reflux of activated sludge also enhances the treatment capacity of the adjustment tank 12 and improves the overall treatment efficiency.

[0041] In an embodiment, as shown in Figure 1 The adjustment tank 12 is connected with a wastewater input pipeline 15.

[0042] In this embodiment, the wastewater input pipeline 15 is an input channel designed for nitromethane wastewater, which directly introduces nitromethane wastewater into the adjustment tank 12. Nitromethane wastewater usually contains high concentration of organic matter and possible toxic components. Through the wastewater input pipeline 15, the system can directly treat nitromethane wastewater specifically. The adjustment tank 12, as the first station for wastewater entering the treatment system, can preliminarily mix, homogenize and adjust the nitromethane wastewater, providing more favorable treatment conditions for subsequent treatment units. The setting of the wastewater input pipeline 15 makes the treatment process more optimized and efficient. The system can directly treat nitromethane wastewater, avoiding mixing and interference with other types of wastewater, thereby improving the treatment efficiency and water quality.

[0043] In an embodiment, the homogenizing hydrolysis tank 1 is installed with a first submersible mixer.

[0044] In this embodiment, the first submersible mixer is directly installed inside the homogenizing hydrolysis tank 1. The mixer can effectively promote the mixing and homogenization process of the wastewater in the tank through its powerful mixing capacity.

[0045] In an embodiment, the anaerobic tank 4 is installed with a second submersible mixer.

[0046] In this embodiment, the second submersible mixer enhances the mixing effect, ensures uniform distribution of microorganisms, and improves the treatment efficiency.

[0047] In one embodiment, the primary A / O tank 5 comprises a first anoxic tank and a first oxic tank in communication with the first anoxic tank, the homogenizing hydrolysis tank 1 is in communication with the first anoxic tank via a second output pipeline 3, and the anaerobic tank 4 is in communication with the first anoxic tank via a third output pipeline 6.

[0048] In this embodiment, the first anoxic tank is a key part of the A / O (Anoxic / Oxic) process, which provides an anoxic environment conducive to the growth and activity of denitrifying bacteria. Under the action of these bacteria, nitrate is reduced to nitrogen, thereby achieving the purpose of denitrification. The first oxic tank is in close communication with the first anoxic tank, which provides an oxygen-rich environment conducive to the growth and reproduction of aerobic microorganisms. In the first oxic tank, organic matter is further oxidized and decomposed, and ammonia nitrogen is converted into nitrate, providing substrate for the subsequent denitrification process in the first anoxic tank. The homogenizing hydrolysis tank 1 serves as the front-end unit of wastewater treatment, mainly responsible for homogenizing and hydrolytic acidification of the influent. Through communication with the first anoxic tank, the wastewater treated by the homogenizing hydrolysis tank 1 can directly enter the first anoxic tank for further treatment. The anaerobic tank 4 mainly undertakes the task of removing organic matter and releasing phosphorus during wastewater treatment. Through communication with the first anoxic tank, the wastewater treated by the anaerobic tank 4 can smoothly enter the first anoxic tank for subsequent denitrification treatment.

[0049] In one embodiment, the secondary A / O tank 9 comprises a second anoxic tank and a second oxic tank in communication with the second anoxic tank, the second anoxic tank is in communication with the first oxic tank, and the second oxic tank is in communication with the sludge sedimentation tank 7 via a fourth output pipeline 8.

[0050] In this embodiment, the second anoxic tank serves as the front end of the secondary A / O tank 9, receiving wastewater from the first oxic tank of the primary A / O tank 5. In the anoxic environment, denitrifying bacteria continue to play a role in reducing nitrate to nitrogen, further reducing the nitrogen content in the wastewater. The second oxic tank is in close communication with the second anoxic tank, providing an oxygen-rich environment. Here, aerobic microorganisms continue to oxidize and decompose organic matter, while converting the remaining ammonia nitrogen into nitrate. In addition, the second oxic tank also undertakes the task of further removing phosphorus, removing phosphorus from wastewater through the action of phosphorus-accumulating bacteria.

[0051] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0053] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A wastewater treatment system, characterized by, It comprises: a homogenizing hydrolysis tank (1) which is communicated with a first output pipeline (2) and a second output pipeline (3), the first output pipeline (2) is installed with a first valve, and the second output pipeline (3) is installed with a second valve; an anaerobic tank (4) which is communicated with the first output pipeline (2); a first A / O tank (5) which is communicated with the second output pipeline (3) and communicated with the anaerobic tank (4) through a third output pipeline (6), and the third output pipeline (6) is installed with a third valve.

2. The wastewater treatment system according to claim 1, wherein the first A / O tank (5) comprises a first anoxic tank and a first aerobic tank which is communicated with the first anoxic tank, the homogenizing hydrolysis tank (1) is communicated with the first anoxic tank through the second output pipeline (3), and the anaerobic tank (4) is communicated with the first anoxic tank through the third output pipeline (6).

3. The wastewater treatment system according to claim 2, wherein the wastewater treatment system further comprises: a second A / O tank (9) which is communicated with the first aerobic tank through a fifth output pipeline (10), and the fifth output pipeline (10) is installed with a fifth valve.

4. The wastewater treatment system according to claim 1, wherein the wastewater treatment system further comprises: a sludge sedimentation tank (7) which is communicated with the first A / O tank (5) through a fourth output pipeline (8), and the fourth output pipeline (8) is installed with a fourth valve.

5. The wastewater treatment system according to claim 4, wherein the sludge sedimentation tank (7) is communicated with the homogenizing hydrolysis tank (1) through a first activated sludge pipeline (11), and the first activated sludge pipeline (11) is installed with a first activated sludge control valve.

6. The wastewater treatment system according to claim 5, wherein the wastewater treatment system further comprises: a conditioning tank (12) which is communicated with the homogenizing hydrolysis tank (1) through a sixth output pipeline (13), and the sixth output pipeline (13) is installed with a sixth valve.

7. The wastewater treatment system according to claim 6, wherein the conditioning tank (12) is communicated with a wastewater input pipeline (15).

8. The wastewater treatment system according to claim 6, wherein the sludge sedimentation tank (7) is communicated with the conditioning tank (12) through a second activated sludge pipeline (14), and the second activated sludge pipeline (14) is installed with a second activated sludge valve.

9. The wastewater treatment system according to claim 1, wherein the homogenizing hydrolysis tank (1) is installed with a first submersible mixer.

10. The wastewater treatment system according to claim 1, wherein the anaerobic tank (4) is installed with a second submersible mixer.

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