Advanced treatment system for upgrading and reconstruction of sewage treatment plant

Abstract

The utility model relates to the technical field of sewage treatment devices, and discloses an advanced treatment system for upgrading and reconstruction of a sewage treatment plant, which is characterized in that an MBR (Membrane Biological Reactor) membrane pool is bidirectionally connected with an MBR membrane water producing pool, the MBR membrane water producing pool is connected with an SAO3 catalytic ozonation reactor, the SAO3 catalytic ozonation reactor is bidirectionally connected with an intermediate pool, the intermediate pool is connected with a biological ball filter, and the biological ball filter is connected with a sewage treatment plant. The biological ball filter is bidirectionally connected with the clean water tank; the MBR membrane tank is respectively connected with a first doser, a first blast aeration device and a sludge tank, and a sludge reflux pump is arranged between the MBR membrane tank and the sludge tank; the SAO3 catalytic ozonation reactor is respectively connected with an ozone generation device, a second blast aeration device and a first adjusting tank; and the biological ball filter is respectively connected with the third blast aeration device and the first adjusting tank. According to the invention, the problems that a sewage treatment plant cannot meet the high requirement of effluent quality, the expansion and transformation are difficult, the occupied area is large, and the construction is difficult are solved, the degradation reaction speed and efficiency can be improved, the occupied area is small, the treatment effect is good, and the operation is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment devices, in particular to a sewage treatment plant upgrading and transformation deep treatment system. Background Art

[0002] With the accelerated development of urbanization and industry in my country, environmental protection issues, especially urban sewage treatment, have become a hot topic of research in various countries. However, as a large amount of domestic and industrial sewage flows into rivers, lakes or groundwater, it causes serious pollution to water bodies, affecting fishery water, domestic water, etc. Urban sewage pollution has become one of the important factors restricting national development.

[0003] In order to achieve higher emission standards, many water plants have been unable to meet existing requirements with their original treatment units due to design reasons. The existing conventional sewage treatment plant system is generally pretreatment + biochemical tank + secondary sedimentation tank + disinfection tank. The expansion and reconstruction of the original treatment system is not only difficult to construct and has limited treatment potential, but also requires large civil engineering investment, occupies a large area, and is also subject to site restrictions. Utility Model Content

[0004] In view of the above problems, the utility model proposes a sewage treatment plant upgrading and transformation deep treatment system to solve the problems of difficulty in treating sewage discharged from sewage treatment plants, large land occupation and construction difficulties; to achieve the above purpose, the utility model of a sewage treatment plant upgrading and transformation deep treatment system includes:

[0005] MBR membrane pool, MBR membrane pool is bidirectionally connected to MBR membrane water production pool, MBR membrane water production pool is connected to SAO3 ozone catalytic oxidation reactor, SAO3 ozone catalytic oxidation reactor is bidirectionally connected to the intermediate water pool, the intermediate water pool is connected to the bio-ball filter pool, and the bio-ball filter pool is bidirectionally connected to the clean water pool;

[0006] The MBR membrane pool is respectively connected to the first dosing device, the first aeration device and the sludge pool, and a sludge return pump is arranged between the MBR membrane pool and the sludge pool;

[0007] The SAO3 ozone catalytic oxidation reactor is respectively connected to the ozone generator, the second aeration device and the first regulating tank;

[0008] The bio-ball filter tank is respectively connected to the third aeration device and the first regulating tank.

[0009] Preferably, a first lifting pump is installed on the pipeline between the MBR membrane pool and the MBR membrane water production pool.

[0010] Preferably, a second lift pump is installed on the pipeline between the MBR membrane water production pool and the SAO3 ozone catalytic oxidation reactor.

[0011] Preferably, a pipeline mixer is installed on the pipeline between the MBR membrane water production pool and the SAO3 ozone catalytic oxidation reactor, and the pipeline mixer is connected to the second dosing device, and the H2O2 solution is stored in the second dosing device.

[0012] Preferably, the SAO3 ozone catalytic oxidation reactor is also connected to an ozone tail gas destroyer.

[0013] Preferably, a third boost pump is installed on the pipeline between the intermediate water tank and the bioball filter tank.

[0014] Preferably, biochemical ball fillers are arranged in the bioball filter.

[0015] Preferably, the ozone generating device is an ozone generator.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] This patent reduces the amount of sludge generated, greatly improves the degradation reaction rate and efficiency of organic matter in wastewater, and improves the final water quality safety of the sewage treatment plant effluent by adding MBR membrane treatment, SAO3 ozone catalytic oxidation reactor and bioball filter treatment. The system is simple to transform, easy to operate and manage, and requires less land area. It has good sewage treatment effect, stable and reliable operation, and is suitable for upgrading existing sewage treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Flow chart for upgrading the deep treatment system of a sewage treatment plant. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] It should be noted that when a device or element is referred to as being “connected to” another device or element, it may be directly connected to the other device or element or indirectly connected to the other device or element.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] See also Figure 1 The utility model provides a technical solution: a sewage treatment plant upgrading and transformation deep treatment system, including:

[0024] MBR membrane pool, MBR membrane pool is bidirectionally connected to MBR membrane water production pool, MBR membrane water production pool is connected to SAO3 ozone catalytic oxidation reactor, SAO3 ozone catalytic oxidation reactor is bidirectionally connected to intermediate water pool, intermediate water pool is connected to bioball filter pool, bioball filter pool is bidirectionally connected to clear water pool; MBR membrane pool is composed of MBR membrane bioreactor and water pool, and is also universal with MBR membrane pool recorded in the prior art. MBR membrane water production pool is the sewage pool after filtration by the previous MBR membrane pool.

[0025] The MBR membrane pool is respectively connected to the first doser, the first aeration device and the sludge pool, and a sludge return pump is arranged between the MBR membrane pool and the sludge pool; the first doser can store the required powder or liquid medicine.

[0026] The SAO3 ozone catalytic oxidation reactor is respectively connected to the ozone generator, the second aeration device and the first regulating tank.

[0027] A first lifting pump is installed on the pipeline between the MBR membrane pool and the MBR membrane water production pool.

[0028] A second lifting pump is installed on the pipeline between the MBR membrane water production pool and the SAO3 ozone catalytic oxidation reactor. At the same time, the SAO3 ozone catalyst is sintered under high temperature conditions to increase the number of micropores and distribution uniformity, obtain a higher specific surface area and more catalytic active points, and maximize the ozone catalytic oxidation efficiency. The ozone utilization rate can reach more than 95%, with less residual tail gas.

[0029] A pipeline mixer is installed on the pipeline between the MBR membrane water production pool and the SAO3 ozone catalytic oxidation reactor. The pipeline mixer is connected to the second doser, and the H2O2 solution is stored in the second doser.

[0030] The SAO3 ozone catalytic oxidation reactor is also connected to a tail gas destruction device, which is an ozone tail gas destroyer, which is not shown in the figure and is a conventional setting.

[0031] A third lifting pump is installed on the pipeline between the intermediate water tank and the bio-ball filter tank.

[0032] The bioball filter is connected to the third aeration device and the first regulating tank respectively; a biochemical ball filler is arranged in the bioball filter, and the biochemical ball filler is a hollow sphere made of plastic, with microorganisms attached to the outer surface. The surface area is large and a large number of microorganisms can be attached; no resistance is generated when water flows through, and the hollow structure can divide the water into fine streams and crush large pieces of suspended matter, with excellent filtering effect.

[0033] An ozone generator is an ozone generator used to produce ozone gas (O3).

[0034] The first and third blast aeration devices are both composed of a blower, a diffusion structure and an air distribution pipe (conventional devices in the prior art, which are not explained in detail here). The blower transports air to the aeration device installed at the bottom of the pool through a series of pipes, and transfers oxygen in the air to the sewage through the diffusion structure. The second blast aeration device is an air backwash system, specifically a gas backwash filter.

[0035] Working principle:

[0036] Step 1: The sewage effluent generated by the original biochemical system enters the MBR membrane pool to increase the sludge volume and sludge activity in the biochemical pool. The sludge flows into the original biochemical system through the sludge return pump, and some of the remaining sludge is discharged into the sludge pool. Secondly, after being filtered by the MBR membrane, the sewage generated enters the MBR membrane water production pool through the first lifting pump. By maintaining a low sludge load to reduce the sludge volume, strengthen the biochemical reaction, improve the sewage treatment effect, and effectively separate suspended matter, colloids, bacteria and other tiny particulate matter in the wastewater.

[0037] Step 2: The wastewater produced by the MBR membrane water production pool is lifted by the second lifting pump and enters the SAO3 ozone catalytic oxidation reactor. The strong oxidizing property of O3 and the efficient catalytic activity of the catalyst are used to oxidize and decompose the difficult-to-degrade organic matter in the wastewater into easily degradable small-molecule organic matter, and the drainage flows by gravity into the first regulating tank.

[0038] Step 3, the intermediate water pool lifts the sewage to the bioball filter through the third lifting pump, and the bioball filter makes the sewage fully dissolve and react in the bioball filter through the third blower aeration device. The sewage passes through the bioball filler, and the pollutants contained in the water body are intercepted by the filter material layer and are degraded and transformed by the organisms attached to the bioball filler. At the same time, the water in the intermediate water pool can be re-injected into the SAO3 ozone catalytic oxidation reactor to form a backwash operation; in addition, dissolved organic matter and specific substances are also removed, and the generated sludge is retained in the filter layer, thereby removing pollutants such as SS, COD, BOD, and ammonia nitrogen in the water; finally, the upper layer of clear water in the bioball filter flows into the clear water pool, and the lower layer of sewage is discharged into the first regulating pool. The water in the clear water pool can also be re-injected into the bioball filter to form a backwash operation, forming a water cycle and reducing the waste of water resources.

[0039] In this embodiment, the system adds MBR membrane treatment + SAO3 ozone catalytic oxidation treatment and bio-ball filter treatment process after the original treatment system, which reduces the amount of sludge generated, greatly improves the degradation reaction rate and efficiency of organic matter in wastewater, and improves the effluent standard of the original sewage treatment plant; the system transformation is simple, the operation and management are convenient, the land area is small, the sewage treatment effect is good, the operation is stable and reliable, and it is suitable for upgrading the existing sewage treatment plants.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

Claims

1. A sewage treatment plant upgrading and transformation deep treatment system, characterized in that: include: MBR membrane pool, the MBR membrane pool is bidirectionally connected to the MBR membrane water production pool, the MBR membrane water production pool is connected to the SAO3 ozone catalytic oxidation reactor, the SAO3 ozone catalytic oxidation reactor is bidirectionally connected to the intermediate water pool, the intermediate water pool is connected to the bioball filter pool, and the bioball filter pool is bidirectionally connected to the clear water pool; The MBR membrane pool is respectively connected to the first dosing device, the first aeration device and the sludge pool, and a sludge return pump is arranged between the MBR membrane pool and the sludge pool; The SAO3 ozone catalytic oxidation reactor is respectively connected to the ozone generator, the second aeration device and the first regulating tank; The bio-ball filter tank is respectively connected to the third aeration device and the first regulating tank.

2. The sewage treatment plant upgrading and transformation deep treatment system according to claim 1 is characterized in that: A first lifting pump is installed on the pipeline between the MBR membrane pool and the MBR membrane water production pool.

3. The sewage treatment plant upgrading and transformation deep treatment system according to claim 1 is characterized in that: A second lifting pump is installed on the pipeline between the MBR membrane water production pool and the SAO3 ozone catalytic oxidation reactor.

4. The sewage treatment plant upgrading and transformation deep treatment system according to claim 1 is characterized in that: A pipeline mixer is installed on the pipeline between the MBR membrane water production pool and the SAO3 ozone catalytic oxidation reactor, and the pipeline mixer is connected to the second doser, and the second doser stores H2O2 solution.

5. The sewage treatment plant upgrading and deep treatment system according to claim 1 is characterized in that: The SAO3 ozone catalytic oxidation reactor is also connected to an ozone tail gas destroyer.

6. The sewage treatment plant upgrading and transformation deep treatment system according to claim 1 is characterized in that: A third lifting pump is installed on the pipeline between the intermediate water pool and the bio-ball filter pool.

7. The sewage treatment plant upgrading and deep treatment system according to claim 1 is characterized in that: Biochemical ball fillers are arranged in the bioball filter.

8. The sewage treatment plant upgrading and transformation deep treatment system according to claim 1 is characterized in that: The ozone generating device is an ozone generator.

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