Sewage treatment device for verifying in-situ sludge reduction

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device for verifying in-situ sludge reduction, which comprises an adjusting tank, a first anaerobic tank, a second anaerobic tank, a first anoxic tank, a second anoxic tank, a first aeration tank, a second aeration tank, a third aeration tank, a fourth aeration tank, a first inclined plate sedimentation tank and a second inclined plate sedimentation tank, the adjusting tank is connected with a first anaerobic tank and a second anaerobic tank through pipelines, the first anaerobic tank and the second anaerobic tank are respectively connected with a first anoxic tank and a second anoxic tank through pipelines, and the first anoxic tank is connected with a first aeration tank and a second aeration tank through pipelines; the second anoxic tank is connected with the third aeration tank and the fourth aeration tank through pipelines, and the second aeration tank and the fourth aeration tank are respectively connected with the first inclined plate sedimentation tank and the second inclined plate sedimentation tank through pipelines. The in-situ sludge reduction effect can be quickly and efficiently verified by the in-situ sludge reduction device.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device for verifying in-situ sludge reduction. Background Art

[0002] AAO method, also known as A2O method (anaerobic-anoxic-aerobic), is a common form of biochemical treatment of sewage. Through the growth and metabolism of microorganisms, organic matter, nitrogen, phosphorus and other pollutants in sewage are removed from the water body. It is widely used in the treatment of domestic sewage and industrial organic wastewater. The principle of this technical solution is to use various microorganisms under anaerobic and aerobic conditions to consume nutrients in sewage in a series of growth and metabolism processes. At the same time, the bacteria spontaneously aggregate to form bacterial flocs, that is, sludge, and use the adsorption of bacterial groups to further purify the water body.

[0003] In principle, during the AAO treatment process, the microorganisms that play a role mainly exist in the form of bacterial masses, that is, sludge. Therefore, a large amount of sludge will inevitably be produced, which has become a very difficult problem in the sewage treatment industry. At present, the main methods for treating and disposing sludge are drying incineration and landfill. The former consumes a lot of energy and generates energy costs, and the latter requires expensive landfill fees and transportation costs. Moreover, with the strengthening of environmental control, the land available for landfill is becoming increasingly tight, and the cost of landfill is constantly increasing. In order to reduce the output of sludge, the industry has carried out a lot of scientific and technological research on sludge reduction. However, since the core of the AAO method is sludge, it is impossible to succeed in sludge reduction within the framework of the technical principle of the AAO method, and there is indeed no successful technical case of in-situ sludge reduction in reality. Therefore, relevant composite materials have been developed to achieve in-situ sludge reduction, so it is necessary to provide a verification device to verify its treatment effect on in-situ sludge reduction. Utility Model Content

[0004] The utility model solves the problems in the related art and proposes a sewage treatment device for verifying in-situ sludge reduction, thereby quickly and efficiently verifying the in-situ sludge reduction effect.

[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions: a sewage treatment device for verifying in-situ sludge reduction, comprising a regulating tank, a first anaerobic tank, a second anaerobic tank, a first anoxic tank, a second anoxic tank, a first aeration tank, a second aeration tank, a third aeration tank, a fourth aeration tank, a first inclined plate sedimentation tank, and a second inclined plate sedimentation tank, wherein the regulating tank is connected to the first anaerobic tank and the second anaerobic tank through a pipeline, the first anaerobic tank and the second anaerobic tank are respectively connected to the first anoxic tank and the second anoxic tank through pipelines, the first anoxic tank is connected to the first aeration tank and the second aeration tank through a pipeline, the second anoxic tank is connected to the third aeration tank and the fourth aeration tank through a pipeline, and the second aeration tank and the fourth aeration tank are respectively connected to the first inclined plate sedimentation tank and the second inclined plate sedimentation tank through pipelines.

[0006] As a preferred embodiment, it also includes an online monitoring device, which includes an ORP online meter, a pH online meter and a DO online meter. The ORP online meter is installed in the first anaerobic tank, the second anaerobic tank, the first anoxic tank and the second anoxic tank. The pH online meter is installed in the regulating tank, the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank. The DO online meter is installed in the first anaerobic tank, the second anaerobic tank, the first anoxic tank, the second anoxic tank, the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank.

[0007] As a preferred solution, the adjacent regulating tank, the first anaerobic tank, the second anaerobic tank, the first anoxic tank, the second anoxic tank, the first aeration tank, the second aeration tank, the third aeration tank, the fourth aeration tank, the first inclined plate sedimentation tank, and the second inclined plate sedimentation tank share a common wall.

[0008] As a preferred solution, a water distribution tank and an overflow tank are provided on the upper part of the regulating tank.

[0009] As a preferred solution, the tops of the first anaerobic tank and the second anaerobic tank are both covered with covers, and the first anaerobic tank and the second anaerobic tank are both equipped with stirrers.

[0010] As a preferred solution, both the first anoxic tank and the second anoxic tank are equipped with a stirrer.

[0011] As a preferred solution, the second aeration tank and the fourth aeration tank are respectively connected to the first anoxic tank and the second anoxic tank through internal reflux pipes.

[0012] As a preferred solution, a plurality of circular hole aeration plates are installed at the bottom of the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank.

[0013] As a preferred solution, the first inclined plate sedimentation tank and the second inclined plate sedimentation tank are connected to the first anaerobic tank and the second anaerobic tank respectively through an external return pipe.

[0014] As a preferred solution, the first inclined plate sedimentation tank and the second inclined plate sedimentation tank are both provided with a mud hopper at the bottom, an inclined plate is installed in the middle, and a water outlet trough is provided at the top.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The utility model can quickly and efficiently verify the in-situ sludge reduction effect, and achieve the purpose of sludge reduction while ultimately achieving the water quality of the effluent meeting the design requirements. The degree of reduction of organic sludge can reach 50~95%;

[0017] (2) Different biological reaction tanks have different requirements for oxygen. The utility model can achieve accurate control of different biological reaction tanks according to oxygen demand to reduce energy consumption by adding a stirrer to the anoxic tank, controlling the reflux, and controlling the number of aeration pumps started and the size of aeration pipeline valves in the aerobic tank;

[0018] (3) The double reflux system provided in the utility model can flexibly select the biological reaction tank as the reflux tank according to the nitrification reaction conditions and dissolved oxygen content in the actual project, and adjust the reflux volume in different biological reaction stages to achieve the highest denitrification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view of the utility model;

[0020] Figure 2 It is the front view of the utility model.

[0021] In the figure:

[0022] 1. Regulating tank, 11. Water distribution tank, 12. Overflow tank, 2A. First anaerobic tank, 2B. Second anaerobic tank, 3A. First anoxic tank, 3B. Second anoxic tank, 4A. First aeration tank, 4B. Second aeration tank, 5A. Third aeration tank, 5B. Fourth aeration tank, 6A. First inclined plate sedimentation tank, 6B. Second inclined plate sedimentation tank, 61. Mud hopper, 62. Inclined plate, 63. Water outlet tank, 7. Circular hole aeration plate, 8. Agitator. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0029] like Figures 1 to 2 As shown, a sewage treatment device for verifying in-situ sludge reduction includes a regulating tank 1, a first anaerobic tank 2A, a second anaerobic tank 2B, a first anoxic tank 3A, a second anoxic tank 3B, a first aeration tank 4A, a second aeration tank 4B, a third aeration tank 5A, a fourth aeration tank 5B, a first inclined plate sedimentation tank 6A, and a second inclined plate sedimentation tank 6B. Adjacent regulating tanks 1, first anaerobic tank 2A, second anaerobic tank 2B, first anoxic tank 3A, second anoxic tank 3B, first aeration tank 4A, second aeration tank 4B, third aeration tank 5A, fourth aeration tank 5B, first inclined plate sedimentation tank 6A, and second inclined plate sedimentation tank 6B share a common wall.

[0030] The regulating tank 1 is in the shape of a rectangular parallelepiped. Domestic sewage or industrial sewage is filtered through a grid to remove impurities and then pumped into the regulating tank 1. In this embodiment, the control combination test group shares one regulating tank 1. In addition, a water distribution tank 11 and an overflow tank 12 are provided on the upper part of the regulating tank 1. The water distribution tank 11 is used for water distribution, and the overflow tank 12 is used to discharge excess sewage to reduce the load.

[0031] The first anaerobic tank 2A ​​and the second anaerobic tank 2B are also rectangular and have covers on the top. In addition, the first anaerobic tank 2A ​​and the second anaerobic tank 2B are also equipped with agitators 8. The regulating tank 1 is connected to the first anaerobic tank 2A ​​and the second anaerobic tank 2B through pipes and pumps, so that the sewage in the regulating tank 1 is pumped into the first anaerobic tank 2A ​​and the second anaerobic tank 2B.

[0032] The first anoxic tank 3A and the second anoxic tank 3B are also rectangular, and the first anaerobic tank 2A ​​and the second anaerobic tank 2B are connected to the first anoxic tank 3A and the second anoxic tank 3B through pumps and pipes, respectively, so that the sewage, sludge, etc. in the first anaerobic tank 2A ​​and the second anaerobic tank 2B are pumped into the first anoxic tank 3A and the second anoxic tank 3B respectively; in addition, the first anoxic tank 3A and the second anoxic tank 3B are also equipped with a stirrer 8 for stirring to accelerate the reaction.

[0033] The first aeration tank 4A, the second aeration tank 4B, the third aeration tank 5A, and the fourth aeration tank 5B are also rectangular parallelepiped. The first anoxic tank 3A is connected to the first aeration tank 4A and the second aeration tank 4B through a pump and a pipeline, and the second anoxic tank 3B is connected to the third aeration tank 5A and the fourth aeration tank 5B through a pump and a pipeline, so that the sewage, sludge, etc. in the first anoxic tank 3A and the second anoxic tank 3B are pumped into the first aeration tank 4A, the second aeration tank 4B, the third aeration tank 5A, and the fourth aeration tank 5B. The second aeration tank 5A and the fourth aeration tank 5B are respectively connected to the first anoxic tank 3A and the second anoxic tank 3B through an internal reflux pipe, and the mud-water mixture in the second aeration tank 5A and the fourth aeration tank 5B is pumped into the first anoxic tank 3A and the second anoxic tank 3B respectively through an internal reflux method.

[0034] Among them, the composite material is added to the first aeration tank 4A and the third aeration tank 5A, and the addition amount is 5‰ of the capacity of the first aeration tank 4A and the third aeration tank 5A, as the experimental group, while the second aeration tank 4B and the fourth aeration tank 5B are not added as the control group. Compared with the traditional AAO method, in this embodiment, the experimental group can reduce energy consumption by 15-25% compared with the control group (without adding the composite material).

[0035] The first inclined plate sedimentation tank 6A and the second inclined plate sedimentation tank 6B are also rectangular parallelepiped. The second aeration tank 5A and the fourth aeration tank 5B are connected to the first inclined plate sedimentation tank 6A and the second inclined plate sedimentation tank 6B respectively through pumps and pipelines, so that the mud and water mixture is pumped into the first inclined plate sedimentation tank 6A and the second inclined plate sedimentation tank 6B respectively through pipelines to achieve rapid separation of mud and water; the first inclined plate sedimentation tank 6A and the second inclined plate sedimentation tank 6B are connected to the first anaerobic tank 2A ​​and the second anaerobic tank 2B respectively through external return pipes and pumps, so that the sludge at the bottom is pumped into the first anaerobic tank 2A ​​and the second anaerobic tank 2B respectively through the external return pipe in a manner of external return.

[0036] In one embodiment, an online monitoring device is also included, which includes an ORP online meter, a pH online meter and a DO online meter. The ORP online meter is installed in the first anaerobic tank 2A, the second anaerobic tank 2B, the first anoxic tank 3A, and the second anoxic tank 3B. The pH online meter is installed in the regulating tank 1, the first aeration tank 4A, the second aeration tank 4B, the third aeration tank 5A, and the fourth aeration tank 5B. The DO online meter is installed in the first anaerobic tank 2A, the second anaerobic tank 2B, the first anoxic tank 3A, the second anoxic tank 3B, the first aeration tank 4A, the second aeration tank 4B, the third aeration tank 5A, and the fourth aeration tank 5B.

[0037] In one embodiment, a plurality of circular hole aeration plates 7 are installed at the bottom of the first aeration tank 4A, the second aeration tank 4B, the third aeration tank 5A, and the fourth aeration tank 5B, which are connected to aeration equipment such as an aeration pump through an aeration pipe to achieve aeration. Valves are provided on the aeration pipe for easy adjustment.

[0038] In one embodiment, a mud hopper 61 is provided at the bottom of the first inclined plate sedimentation tank 6A and the second inclined plate sedimentation tank 6B, an inclined plate 62 is installed in the middle, and a water outlet trough 63 is provided at the top. A stirrer 8 is installed in the first inclined plate sedimentation tank 6A and the second inclined plate sedimentation tank 6B. The function of the inclined plate sedimentation tank is to remove suspended solids (SS) generated by the AAO method. At the same time, the phosphorus content in the water can be reduced by adding drugs so that the effluent water quality meets the design requirements.

[0039] In addition, sewage contains organic nitrogen and ammonia nitrogen, etc. Organic nitrogen and ammonia nitrogen need to be converted into nitrates under the action of aerobic microorganisms. Nitrates are denitrified and converted into nitrogen gas under the action of anoxic conditions and discharged, thereby reducing the total nitrogen in the water and meeting the requirements of drainage standards. The organic nitrogen and ammonia nitrogen in the water are degraded step by step from the front end to the back end of the aeration tank. Therefore, the lower the organic nitrogen and ammonia nitrogen in the water, the higher the dissolved oxygen in the water. Since the denitrification process can only react efficiently under low dissolved oxygen conditions (DO<0.5mg / l), if it is not properly controlled, when the aeration tank is returned from the last end, it is easy to cause excessive dissolved oxygen in the anoxic-denitrification section, which affects the efficiency of denitrification. When the aeration tank is returned from the middle section, the dissolved oxygen is low, the impact on denitrification is small, and the denitrification efficiency is high; but the degradation of organic nitrogen and ammonia nitrogen in the middle section may not be complete, and the content of organic nitrogen and ammonia nitrogen converted into nitrate is low, resulting in low denitrification efficiency. Therefore, the double reflux system provided in the utility model can flexibly select the biological reaction tank as the reflux tank according to the nitrification reaction conditions and dissolved oxygen content in the actual project, and adjust the reflux amount in different biological reaction stages to achieve the highest denitrification efficiency.

[0040] The above are preferred implementation modes of the present invention. Technicians in the field to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by technicians in this field on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. A sewage treatment device for verifying in-situ sludge reduction, characterized in that: The invention comprises a regulating tank, a first anaerobic tank, a second anaerobic tank, a first anoxic tank, a second anoxic tank, a first aeration tank, a second aeration tank, a third aeration tank, a fourth aeration tank, a first inclined plate sedimentation tank and a second inclined plate sedimentation tank. The regulating tank is connected with the first anaerobic tank and the second anaerobic tank through a pipeline. The first anaerobic tank and the second anaerobic tank are respectively connected with the first anoxic tank and the second anoxic tank through pipelines. The first anoxic tank is connected with the first aeration tank and the second aeration tank through pipelines. The second anoxic tank is connected with the third aeration tank and the fourth aeration tank through pipelines. The second aeration tank and the fourth aeration tank are respectively connected with the first inclined plate sedimentation tank and the second inclined plate sedimentation tank through pipelines.

2. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: It also includes an online monitoring device, which includes an ORP online meter, a pH online meter and a DO online meter. The ORP online meter is installed in the first anaerobic tank, the second anaerobic tank, the first anoxic tank and the second anoxic tank. The pH online meter is installed in the regulating tank, the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank. The DO online meter is installed in the first anaerobic tank, the second anaerobic tank, the first anoxic tank, the second anoxic tank, the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank.

3. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: The adjacent regulating tank, the first anaerobic tank, the second anaerobic tank, the first anoxic tank, the second anoxic tank, the first aeration tank, the second aeration tank, the third aeration tank, the fourth aeration tank, the first inclined plate sedimentation tank, and the second inclined plate sedimentation tank share a common wall.

4. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: A water distribution tank and an overflow tank are arranged on the upper part of the regulating tank.

5. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: The tops of the first anaerobic tank and the second anaerobic tank are both covered with a cover plate, and the first anaerobic tank and the second anaerobic tank are both equipped with a stirrer.

6. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: The first anoxic tank and the second anoxic tank are both equipped with a stirrer.

7. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: The second aeration tank and the fourth aeration tank are respectively connected to the first anoxic tank and the second anoxic tank through internal reflux pipes.

8. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: A plurality of circular hole aeration plates are installed at the bottom of the first aeration tank, the second aeration tank, the third aeration tank and the fourth aeration tank.

9. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: The first inclined plate sedimentation tank and the second inclined plate sedimentation tank are connected to the first anaerobic tank and the second anaerobic tank respectively through external return pipes.

10. The sewage treatment device for verifying in-situ sludge reduction according to claim 1, characterized in that: The first inclined plate sedimentation tank and the second inclined plate sedimentation tank are both provided with a mud hopper at the bottom, an inclined plate is installed in the middle, and a water outlet trough is provided at the top.

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