CN211111292U - MABR rural sewage treatment plant - Google Patents
MABR rural sewage treatment plant Download PDFInfo
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- CN211111292U CN211111292U CN201921747396.0U CN201921747396U CN211111292U CN 211111292 U CN211111292 U CN 211111292U CN 201921747396 U CN201921747396 U CN 201921747396U CN 211111292 U CN211111292 U CN 211111292U
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Abstract
The utility model relates to a sewage treatment technical field discloses a rural sewage treatment plant of MABR, include the oxygen deficiency pond in advance with loop form UNICOM in proper order, the anaerobism pond, the oxygen deficiency pond, one-level good oxygen pond, second grade good oxygen pond, sedimentation tank. The utility model discloses a rural sewage treatment plant of MABR is integrated to have the multistage treatment process, and each technology section integrated level is high, rationally distributed, linkage nature is strong around, consequently makes aeration system can operate with less energy consumption to can ensure out water stabilization of water quality. The device is used for treating the sewage generated in daily life, the quality of the discharged water can be ensured, and the influence of the sewage on the surrounding environment is reduced.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, a rural sewage treatment technique is related to, especially a MABR sewage treatment plant.
Background
With the development of society and economy in recent years, the living standard of rural areas in China is continuously improved, and the problem of water pollution in the rural areas is increasingly serious. Rural domestic sewage has the characteristics of large water quality and water quantity fluctuation, small water discharge, distributed dispersion and the like, and does not always have the condition of centralized collection and centralized treatment, so that a proper technology is needed to meet local conditions, and the economic requirement of rural domestic sewage treatment is met under the condition of ensuring water quality.
A Membrane Aeration Biofilm Reactor (MABR) is a membrane-biological treatment combined process with low energy consumption. In MABR, an aerated membrane provides both aeration and a carrier for biofilm growth. Oxygen is positioned in the hollow fiber membrane and diffuses into the biological membrane through the interface of the membrane/biological membrane, while a substrate in the sewage enters the biological membrane from the interface of the biological membrane/liquid phase, and the anisotropic mass transfer of the sewage and the oxygen can cause the functional activity stratification of the biological membrane, thereby improving the treatment effect. In addition, because the MABR belongs to foamless aeration, compared with the mainstream activated sludge process, the aeration rate is small, and the aeration energy consumption is low.
However, the existing sewage treatment device has fewer treatment process sections, unsatisfactory and stable water quality, low equipment integration level, large energy consumption of an aeration system and poor operation and maintenance effects.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an above-mentioned problem to prior art exists has proposed a rural sewage treatment plant of MABR, the utility model discloses a rural sewage treatment plant of MABR is integrated to have the multistage treatment process, and each technology section integrated level is high, rationally distributed, linkage nature is strong around, consequently makes aeration system can function with less energy consumption to can ensure out water stabilization of water quality.
The purpose of the utility model can be realized by the following technical proposal: an MABR rural sewage treatment device comprises a pre-anoxic tank, an anaerobic tank, an anoxic tank, a primary aerobic tank, a secondary aerobic tank and a sedimentation tank which are communicated in sequence in a loop form. A water inlet pipe is arranged at the bottom of the pre-anoxic tank; a first packing component is arranged in the anaerobic tank; a second filler assembly is arranged in the anoxic tank, and an aeration perforated pipe is arranged at the bottom of the anoxic tank; the first-stage aerobic tank is provided with a third packing component, the bottom of the first-stage aerobic tank is provided with an aeration device, the second-stage aerobic tank is provided with a plurality of MABR oxygen-permeable membrane components, a stirring device in the second-stage aerobic tank and a nitrifying liquid return pipe; the lower part of the sedimentation tank is provided with a sludge return pipe, the sedimentation tank is communicated with a drain pipe, and a water collecting tank is arranged between the sedimentation tank and the drain pipe.
The utility model discloses in, sewage loops through oxygen deficiency pond in advance, anaerobism pond, oxygen deficiency pond, one-level good oxygen pond, second grade good oxygen pond, sedimentation tank. Specifically, in the pre-anoxic tank, the buffer is used for preventing the dissolved oxygen in the returned sludge from impacting the anaerobic environment of the anaerobic tank, and meanwhile, partial denitrification reaction is carried out through the anoxic environment. In the anaerobic tank, anaerobic bacteria fully contact with organic matters in the sewage and carry out anaerobic reaction to consume the organic matters in the sewage, reduce the treatment load in the water body, fully release phosphorus from phosphorus accumulating bacteria and provide convenience for subsequent working sections. The sewage in the anoxic pond is subjected to denitrification reaction under the action of microorganisms, so that the nitrogen content in the sewage is reduced. Meanwhile, a small amount of aeration is carried out on the bottom of the tank, so that the sewage and the filler can be fully mixed, and the sludge can be prevented from precipitating. In the first-stage aerobic tank, under the action of the filler and in cooperation with aeration, aerobic bacteria are fully mixed with sewage, which is favorable for degrading organic matters and performing ammonia nitrogen conversion. In the secondary aerobic tank, the MABR oxygen permeable membrane component is filled, so that the treatment effect is further enhanced under the bubble-free aeration. In the sedimentation tank, sewage is sedimentated, sludge and suspended matters are settled, and finally the sewage enters a subsequent unit through a drain pipe or is discharged.
The utility model discloses in, rationally integrate in an organic whole with a plurality of workshop sections with the return circuit form, area is little. And each workshop section has reasonable layout and strong linkage, and a plurality of preceding workshop sections provide convenience for the operation of subsequent workshop sections. The stable quality of the effluent can be ensured under the coordination of all working sections. In addition, under the above layout, all the sections are closely connected, and the air supply path of the air supply pipeline is short, so that the aeration system can operate with less energy consumption.
In certain embodiments, the sludge return line is connected to the top of the pre-anoxic tank. The utility model discloses pass through the mud back flow with the mud in the sedimentation tank and flow back to initial oxygen deficiency pond in advance, its benefit lies in: the sludge concentration in the system is kept, and the residual oxygen in the sludge in the sedimentation process is consumed by the pre-anoxic tank, so that the stability of the anaerobic tank system is ensured, and the impact is reduced.
In some embodiments, the top of the anoxic pond is connected to the nitrifying liquid return pipe. The utility model discloses with the nitrifying liquid that produces in the second grade good oxygen pond through nitrifying the liquid back flow and flow back to the oxygen deficiency pond in, through denitrification in the oxygen deficiency pond with nitrate nitrogen reduction for nitrogen gas discharge, total nitrogen content in the reduction system water.
In certain embodiments, the first and second packing elements are fixed combination packings and the third packing element is a fixed combination packing or an MBBR packing.
In some embodiments, the primary aerobic tank aeration device is a tubular aerator. The tubular aerator has good aeration effect, and can make sewage fully contact with the filler and provide oxygen.
In some embodiments, a plurality of MABR oxygen permeable membrane assemblies are arranged in the secondary aerobic tank, the assemblies are connected in series or in parallel through air inlets and air outlets, and the stirring device is a submersible stirrer. The MABR oxygen permeable membrane modules can be connected in series or in parallel according to actual requirements, and the combination mode is flexible and changeable. The submersible mixer not only can make sewage fully contact with the filler, but also can prevent sludge from precipitating.
In some embodiments, the sludge return pipe in the sedimentation tank is a gas stripping sludge return pipe, and the sludge return pipe is provided with a valve for controlling the return and discharge of sludge.
In some embodiments, the device further comprises an air supply pipe, wherein the air supply pipe is connected with the aeration perforated pipe, the aeration device and the MABR oxygen-permeable membrane module and supplies air for the nitrification liquid return pipe and the sludge return pipe, and the related air amount is adjusted through a valve.
The utility model discloses the theory of operation of device does: rural domestic sewage firstly enters a pre-anoxic tank through a water inlet pipe, and in the anoxic tank, the sewage is fully mixed with return sludge (returned to a sedimentation tank) to play a role of buffering, so that impact on an anaerobic tank is reduced, anaerobic bacteria decompose refractory organic matters through anaerobic reaction after entering the anaerobic tank, the treatment load in a water body is reduced, phosphorus-accumulating bacteria fully release phosphorus, and then the sewage enters the anoxic tank to perform denitrification and total nitrogen removal, a small amount of perforated pipes at the bottom of the tank are aerated to ensure full mixing, sludge sedimentation is prevented, MBBR suspended fillers are added in a primary aerobic tank, oxygen supply and water body disturbance are ensured through bottom aeration, aerobic bacteria and the water body perform fully mixed matter exchange, the organic matters are degraded, and ammonia nitrogen conversion is performed. After entering a secondary aerobic tank, the treatment effect is further enhanced through the foamless aeration function of the MABR membrane component, a stirrer is arranged at the bottom of the tank to ensure the flow state in the tank body and prevent sludge deposition, and the nitrified liquid flows back to enter an anoxic tank through a nitrified liquid return pipe to remove total nitrogen. And then, sewage enters a sedimentation tank for sedimentation, sludge and suspended matters are settled, sludge is returned to the anoxic tank through an air-lift type sludge return pipe at the bottom of the tank, intermittent sludge discharge is performed, and the sewage enters a subsequent unit or is discharged through a pipeline.
Compared with the prior art, the utility model discloses a MABRr rural sewage treatment plant has following advantage: the utility model discloses a rural sewage treatment plant of MABR is integrated to have the multistage treatment process, and each technology section integrated level is high, rationally distributed, linkage nature is strong around, consequently makes aeration system can operate with less energy consumption to can ensure out water stabilization of water quality. Furthermore, the device of the utility model is simple in structure, convenient operation, it is with low costs, can improve treatment effeciency greatly to can reach corresponding play water standard according to integrated filtering ponds of actual demand and disinfection system.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.
It will be understood by those of ordinary skill in the art that all directional references (e.g., above, below, upward, downward, top, bottom, left, right, vertical, horizontal, etc.) are illustratively used in the figures to aid the reader's understanding and do not imply (e.g., position, orientation, or use, etc.) a limitation on the scope of the invention, which is defined by the claims appended hereto. Additionally, the term "substantially" may refer to slight imprecision or deviation in conditions, amounts, values, or dimensions, etc., some of which may be within manufacturing or tolerance limits.
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The following embodiments do not limit the invention to which the claims refer. Moreover, all combinations of features described in the embodiments are not necessarily essential to the solution of the invention.
Example one
As shown in figure 1, the MABR rural sewage treatment device comprises a pre-anoxic tank 1, an anaerobic tank 2, an anoxic tank 3, a primary aerobic tank 4, a secondary aerobic tank 5 and a sedimentation tank 6 which are communicated in sequence in a loop form. The sewage enters from the water inlet pipe 11, is treated and then is discharged from the water outlet pipe 63. The bottom of the pre-anoxic tank 1 is provided with a water inlet pipe 11; a fixed combined filler is arranged in the anaerobic tank 2; a fixed combined filler is arranged in the anoxic tank 3, and an aeration perforated pipe 31 is arranged at the bottom; the primary aerobic tank 4 is provided with a fixed combined filler or an MBBR filler, the bottom of the primary aerobic tank is provided with a tubular aerator 41, and the secondary aerobic tank 5 is provided with a plurality of MABR oxygen permeable membrane assemblies 51, a stirring device (a submersible stirrer) 52 and a nitrifying liquid return pipe 53 communicated with the anoxic tank 3 which are connected in series or in parallel; the lower part of the sedimentation tank 6 is provided with a sludge return pipe (air-lift sludge return pipe) 61 communicated with the pre-anoxic tank 1, and a valve is arranged for controlling the return and discharge. The rear end of the sedimentation tank 6 is provided with a water collecting tank 62, and the water collecting tank 62 is communicated with a drain pipe 63. The pre-anoxic tank 1 is connected to a sludge return pipe from the top. The anoxic pond 3 is connected to a nitrifying liquid return pipe 53 from the top.
In addition, the device also comprises an air supply pipe 7, the air supply pipe 7 is connected with the aeration perforated pipe 31, the aeration device 41 and the MABR oxygen permeable membrane assembly 51, supplies air for the nitrification liquid return pipe 53 and the sludge return pipe 61, and can adjust the related air quantity through a valve.
The process of using the device to treat sewage is as follows:
rural domestic sewage enters the pre-anoxic tank and then is fully mixed with return sludge, so that a buffering effect can be achieved, a small amount of oxygen in water is consumed in the pre-anoxic tank, impact on the anaerobic tank is reduced, anaerobic bacteria decompose refractory organic matters through anaerobic reaction after entering the anaerobic tank, the treatment load in water is reduced, phosphorus-accumulating bacteria fully release phosphorus, then the rural domestic sewage enters the anoxic tank for denitrification and total nitrogen removal, a small amount of perforated pipes at the bottom of the tank are aerated, so that sufficient mixing is ensured, sludge sedimentation is prevented, MBBR suspended fillers are added into the primary aerobic tank, oxygen supply and water body disturbance are ensured through bottom aeration, aerobic bacteria and water body are subjected to fully mixed matter exchange, the organic matters are degraded, and ammonia nitrogen conversion is carried out. After entering a secondary aerobic tank, the treatment effect is further enhanced through the foamless aeration function of the MABR membrane component, a stirrer is arranged at the bottom of the tank to ensure the flow state in the tank body and prevent sludge deposition, and the nitrified liquid flows back to enter an anoxic tank through a nitrified liquid return pipe to remove total nitrogen. Then the sewage enters a sedimentation tank for sedimentation, sludge and suspended matters are settled, the bottom of the tank returns the sludge to a pre-anoxic tank through an air-lift type sludge return pipe, intermittent sludge discharge is carried out, and the sewage enters a subsequent unit or is discharged through a pipeline.
Although some terms are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention. The order of execution of the operations, steps, and the like in the apparatuses and methods shown in the specification and drawings may be implemented in any order as long as the output of the preceding process is not used in the subsequent process, unless otherwise specified. The descriptions using "first", "next", etc. for convenience of description do not imply that they must be performed in this order.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (8)
1. An MABR rural sewage treatment device is characterized by comprising a pre-anoxic tank (1), an anaerobic tank (2), an anoxic tank (3), a primary aerobic tank (4), a secondary aerobic tank (5) and a sedimentation tank (6) which are communicated in sequence in a loop form, wherein a water inlet pipe (11) is arranged at the bottom of the pre-anoxic tank (1); a first packing component is arranged in the anaerobic tank (2); a second filler component is arranged in the anoxic tank (3), and an aeration perforated pipe (31) is arranged at the bottom of the anoxic tank; the first-stage aerobic tank (4) is provided with a third packing component, the bottom of the first-stage aerobic tank is provided with an aeration device (41), and the second-stage aerobic tank (5) is provided with a plurality of MABR oxygen permeable membrane components (51) and a stirring device (52); the sedimentation tank (6) is communicated with a drain pipe (63), and a water collecting tank (62) is arranged between the sedimentation tank (6) and the drain pipe (63).
2. The MABR rural sewage treatment plant according to claim 1, wherein a sludge return pipe (61) is arranged at the lower part of said sedimentation tank (6), and the top of said pre-anoxic tank (1) is connected to said sludge return pipe (61).
3. The MABR rural sewage treatment plant according to claim 1, wherein the bottom of said secondary aerobic tank is provided with a nitrifying liquid return pipe (53); the top of the anoxic tank (3) is connected with the nitrifying liquid return pipe (53).
4. The MABR rural sewage treatment plant of claim 1, wherein said first and second packing elements are fixed combination packing and said third packing element is fixed combination packing or MBBR packing.
5. The MABR rural sewage treatment plant according to claim 1, wherein said aeration device (41) in said primary aerobic tank (4) is a tubular aerator.
6. The MABR rural sewage treatment plant according to claim 1, wherein a plurality of MABR oxygen permeable membrane assemblies (51) connected in series or in parallel through air inlets and air outlets are arranged in the secondary aerobic tank (5), and the stirring device (52) is a submersible stirrer.
7. The MABR rural sewage treatment plant according to claim 2, wherein said sludge return pipe (61) in said sedimentation tank (6) is a gas stripping sludge return pipe equipped with a valve to control the return and discharge of sludge.
8. The MABR rural sewage treatment plant according to claim 7, wherein the plant further comprises a gas supply pipe (7), the gas supply pipe (7) is connected with the aeration perforated pipe (31), the aeration device (41) and the MABR oxygen permeable membrane module (51) and supplies gas for the nitrification liquid return pipe (53) and the sludge return pipe (61), and the related gas amount is adjusted by a valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921747396.0U CN211111292U (en) | 2019-10-17 | 2019-10-17 | MABR rural sewage treatment plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921747396.0U CN211111292U (en) | 2019-10-17 | 2019-10-17 | MABR rural sewage treatment plant |
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| CN211111292U true CN211111292U (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212875A (en) * | 2021-12-20 | 2022-03-22 | 北京首创生态环保集团股份有限公司 | System and method suitable for activated sludge process upgrading and reconstruction |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212875A (en) * | 2021-12-20 | 2022-03-22 | 北京首创生态环保集团股份有限公司 | System and method suitable for activated sludge process upgrading and reconstruction |
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