CN108793409B - Sewage treatment device suitable for rural sewage flow change - Google Patents
Sewage treatment device suitable for rural sewage flow change Download PDFInfo
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- CN108793409B CN108793409B CN201810995232.3A CN201810995232A CN108793409B CN 108793409 B CN108793409 B CN 108793409B CN 201810995232 A CN201810995232 A CN 201810995232A CN 108793409 B CN108793409 B CN 108793409B
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- 239000010865 sewage Substances 0.000 title claims abstract description 123
- 230000008859 change Effects 0.000 title abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 239000010802 sludge Substances 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 33
- 238000004062 sedimentation Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 22
- 239000006228 supernatant Substances 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000004065 wastewater treatment Methods 0.000 claims 2
- 230000008569 process Effects 0.000 description 10
- 206010021143 Hypoxia Diseases 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The application relates to the technical field of sewage treatment, in particular to a sewage treatment device suitable for rural sewage flow change. The two facultative tanks are arranged, which is equivalent to the arrangement that the SBR system is arranged behind the AAO system, and the two facultative tanks are operated alternately, so that the denitrification and dephosphorization efficiency of the device is greatly improved, and meanwhile, the water storage capacity of the whole sewage treatment device can be effectively regulated, so that the sewage treatment device is suitable for sewage treatment environments with larger sewage flow changes, can be suitable for sewage treatment environments with different conditions, has stable sewage treatment quality, and greatly improves the adaptability to sewage flow changes; the application promotes the adaptability of the existing sewage treatment device to rural sewage flow change and the efficiency of denitrification and dephosphorization, has stronger popularization and has important significance in the field of sewage treatment in small areas.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to a sewage treatment device suitable for rural sewage flow change.
Background
At present, rural sewage treatment is basically in the stage of transplanting a method for treating urban sewage in a moving mode. However, compared with cities, rural areas are usually in remote areas, the population density is low, the sewage water quantity is dispersed, and the water quantity variation range is large; if centralized treatment is carried out, the sewage pipe network is excessively long in laying, excessive in investment, insufficient in load of a sewage plant and difficult to operate; therefore, according to the different social organization structure, economic level and living habit of rural areas, the small-sized decentralized treatment method with low investment and convenient operation and management should be selected according to local conditions in the aspect of selecting sewage treatment technology.
The urban sewage treatment method is difficult to perfectly adapt to rural sewage treatment, and the distributed integrated rural sewage treatment device developed based on the inherent treatment method also has various problems, cannot well adapt to the problem of rural sewage water quantity change, and has extremely unstable treatment efficiency.
Disclosure of Invention
To solve the above technical problems or at least partially solve the above technical problems, the present application provides a sewage treatment apparatus adapted to rural sewage flow rate variation.
This application includes along sewage flow direction sets gradually: the device comprises a main water inlet pipe, an anaerobic tank, an anoxic tank, an aerobic tank, a first facultative tank/second facultative tank, a sedimentation tank and a water outlet, wherein a preposed anoxic tank is arranged at the upstream of the anaerobic tank, and a sludge concentration tank is arranged at the upstream of the preposed anoxic tank; the sludge in the sedimentation tank is conveyed into the sludge concentration tank, partial reflux liquid of the first facultative tank and partial reflux liquid of the second facultative tank are respectively introduced into the sludge concentration tank, supernatant liquid of the sludge concentration tank is introduced into the anoxic tank, and sludge in the sludge concentration tank enters the anaerobic tank through the front anoxic tank; the first facultative tank and the second facultative tank alternately operate.
Optionally, the preposed anoxic tank, the anaerobic tank, the anoxic tank and the aerobic tank are all provided with the super height of not less than 0.3 m.
Optionally, the main inlet tube respectively with leading oxygen deficiency pond, first facultative tank, second facultative tank intercommunication through the reposition of redundant personnel pipeline, main inlet tube, a plurality of reposition of redundant personnel pipeline connect respectively to the bottom in anaerobism pond, leading oxygen deficiency pond, first facultative tank, second facultative tank, get into the sewage volume in anaerobism pond, leading oxygen deficiency pond, first facultative tank, second facultative tank is all adjustable.
Optionally, the main water inlet pipe is provided with a flowmeter;
when the sewage flow entering the main water inlet pipe is larger than a set value, 70% of sewage is distributed to the anaerobic tank, and the rest of sewage is distributed to the front anoxic tank, the first facultative tank and the second facultative tank;
when the sewage flow entering the main water inlet pipe is smaller than a set value, 80% of sewage is distributed to the first facultative tank and the second facultative tank, and the rest of sewage is distributed to the front anoxic tank and the anaerobic tank.
Optionally, the liquid level of main inlet tube department is greater than the liquid level of each reaction tank, and the liquid level of each reaction tank is all greater than the liquid level of delivery port department, the delivery port is connected with the flow control valve.
Optionally, the anaerobic treatment device further comprises a tank body, wherein the main water inlet pipe, the anaerobic tank, the anoxic tank, the aerobic tank, the first facultative tank, the second facultative tank, the sedimentation tank, the water outlet, the front anoxic tank and the sludge concentration tank are all arranged in the tank body.
Optionally, the aerobic tank is arranged at one end of the tank body, the sedimentation tank and the water outlet are arranged at the other end of the tank body, the first facultative tank and the second facultative tank are arranged side by side, one ends of the first facultative tank and the second facultative tank are connected with the aerobic tank, the other ends of the first facultative tank and the second facultative tank are connected with the sedimentation tank, the anoxic tank, the anaerobic tank, the front anoxic tank and the sludge concentration tank are sequentially arranged in an area between the first facultative tank and the second facultative tank, the anoxic tank is connected with the aerobic tank, and the front anoxic tank is connected with the sedimentation tank.
Optionally, the device further comprises a clear water tank, wherein the clear water tank is arranged between the sedimentation tank and the water outlet, and supernatant fluid of the sedimentation tank enters the water outlet through the clear water tank.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: the Anaerobic-Anoxic-aerobic sewage treatment device is provided with two facultative ponds, which are equivalent to an SBR (sequencing batch reactor activated sludge process ) system arranged behind an AAO (Anaerobic-Anoxic-aerobic) system, so that the denitrification and dephosphorization efficiency of the device is greatly improved, and meanwhile, the water storage capacity of the whole sewage treatment device can be effectively regulated, so that the Anaerobic-Anoxic-aerobic sewage treatment device is suitable for sewage treatment environments with larger sewage flow changes, sewage treatment environments with different conditions can be adapted, the sewage treatment quality is stable, and the adaptability to sewage flow changes is greatly improved; the application promotes the adaptability of the existing sewage treatment device to rural sewage flow change and the efficiency of denitrification and dephosphorization, has stronger popularization and has important significance in the field of sewage treatment in small areas.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic plan view of a sewage treatment apparatus adapted for rural sewage flow rate variation according to an embodiment of the present application;
fig. 2 is a flow chart of the operation of the sewage treatment apparatus for rural sewage flow rate variation according to the embodiment of the present application.
Wherein, 1, an aerobic tank; 3. an anoxic tank; 4. an anaerobic tank; 5. a first facultative tank; 6. a second facultative tank; 7. a main water inlet pipe; 9. a front anoxic tank; 10. a sludge concentration tank; 11. a sedimentation tank; 12. a clean water tank; 13. and a water outlet.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
As shown in fig. 1, the sewage treatment device suitable for rural sewage flow change comprises the following components in sequence along the sewage flow direction: the anaerobic treatment device comprises a main water inlet pipe 7, an anaerobic tank 4, an anoxic tank 3, an aerobic tank 1, a first facultative tank 5/second facultative tank 6, a sedimentation tank 11 and a water outlet 13, wherein a front anoxic tank 9 is arranged at the upstream of the anaerobic tank 4, and a sludge concentration tank 10 is arranged at the upstream of the front anoxic tank 9; the sludge in the sedimentation tank 11 is conveyed into the sludge concentration tank 10, partial reflux liquid of the first facultative tank 5 and partial reflux liquid of the second facultative tank 6 are respectively introduced into the sludge concentration tank 10, supernatant liquid of the sludge concentration tank 10 is introduced into the anoxic tank 3, and sludge in the sludge concentration tank 10 enters the anaerobic tank 4 through the pre-anoxic tank 9; the first facultative tank 5 and the second facultative tank 6 alternately operate. The AAO system generally comprises: the main water inlet pipe 7, the anaerobic tank 4, the anoxic tank 3, the aerobic tank 1, the sedimentation tank 11 and the sludge concentration tank 10 have the function of synchronous denitrification and dephosphorization; SBR systems generally comprise: the first facultative tank 5, the second facultative tank 6 and the sedimentation tank 11 are suitable for occasions with larger intermittent discharge and flow change; the two facultative tanks are arranged, which is equivalent to the arrangement that the SBR system is arranged behind the AAO system, and the two facultative tanks are alternately operated, so that the denitrification and dephosphorization efficiency of the device is greatly improved, and meanwhile, the water storage capacity of the whole sewage treatment device can be effectively regulated, so that the sewage treatment device is suitable for sewage treatment environments with larger sewage flow changes; under the condition that the preposed AAO system runs continuously, the two facultative tanks run alternately, so that continuous water outlet is realized, the facultative tanks can be maintained, the treatment capacity of the facultative tanks is ensured, the sewage treatment environment of different conditions can be adapted, the sewage treatment quality is stable, and the adaptability to sewage flow change is greatly improved; the application promotes the adaptability of the existing sewage treatment device to rural sewage flow change and the efficiency of denitrification and dephosphorization, has stronger popularization and has important significance in the field of sewage treatment in small areas.
Optionally, the preposed anoxic tank 9, the anaerobic tank 4, the anoxic tank 3 and the aerobic tank 1 are all provided with the super height of not less than 0.3 m. The ultrahigh part can be used as a water storage area under the condition of large water quantity, and the condition of suddenly increasing the sewage quantity can be effectively treated; the continuous operation of the system can be ensured by the alternate operation of the facultative tank under the condition of small water quantity, and the sewage purification quality can be ensured.
Optionally, the main water inlet pipe 7 is respectively communicated with the front anoxic tank 9, the first facultative tank 5 and the second facultative tank 6 through a split pipeline, and the main water inlet pipe 7 and the plurality of split pipelines are respectively connected to the bottoms of the anaerobic tank 4, the front anoxic tank 9, the first facultative tank 5 and the second facultative tank 6 and enter the anaerobic tank 4, the front anoxic tank 9, the first facultative tank 5 and the second facultative tank 6, so that the sewage amount of the sewage can be adjusted. The sewage enters each reaction tank after being split, and the reaction carbon source supply in the areas can be flexibly regulated by regulating the sewage entering amount of each reaction tank, so that the sewage treatment capacity of each reaction tank is ensured not to be influenced.
Optionally, the main water inlet pipe 7 is provided with a flowmeter; the flowmeter can monitor the sewage flow entering the main water inlet pipe 7 in real time;
when the sewage flow entering the main water inlet pipe 7 is larger than a set value, 70% of sewage is distributed to the anaerobic tank 4, and the rest of sewage is distributed to the front anoxic tank 9, the first facultative tank 5 and the second facultative tank 6;
when the sewage flow entering the main water inlet pipe 7 is smaller than a set value, 80% of sewage is distributed to the first facultative tank 5 and the second facultative tank 6, and the rest of sewage is distributed to the pre-anoxic tank 9 and the anaerobic tank 4. The set value is determined according to the total sewage amount change in the actual environment and the treatment capacity of the device, so that the sewage treatment device can stably operate.
The sewage weight is large, and the sewage treatment device is required to store water, then about 70% of the sewage enters the anaerobic tank 4 for reaction, and the rest of the sewage is distributed to the front anoxic tank 9, the first facultative tank 5 and the second facultative tank 6 according to the ratio of 1:1:1 so as to ensure the carbon source distribution of each area; if the total amount of sewage is less and the operation of the AAO process cannot be supported, 80% of sewage directly enters the first facultative tank 5 and the second facultative tank 6, the sewage treatment process is completed through the SBR process, and the rest of small amount of sewage is distributed to the front anoxic tank 9 and the anaerobic tank 4, so that the front anoxic tank 9 and the anaerobic tank 4 are in a low flow storage and conservation microorganism stage, and the activity of the reaction tank is maintained.
Optionally, the liquid level of main inlet tube 7 department is greater than the liquid level of each reaction tank, and the liquid level of each reaction tank is greater than the liquid level of delivery port 13 department, delivery port 13 is connected with the flow control valve. Such as: the liquid level at the main water inlet pipe 7 is 1.7m, the liquid level of each reaction tank is generally 1.5m, and the liquid level at the water outlet 13 is 0.5m. The liquid level of the main water inlet pipe 7 is higher than that of each reaction tank, and the liquid level of the reaction tanks can have a certain lifting space when water is stored, so that water is conveniently stored; the liquid level of each reaction tank is greater than the liquid level at the water outlet 13; the sewage inlet amount can be fluctuated at any time, and the liquid level of each reaction tank can be adjusted by adjusting the flow adjusting valve of the water outlet 13, so that the situations of water storage and less sewage inlet amount are realized; the flow regulating valve needs to be frequently regulated, the liquid level at the water outlet is low, the pressure born by the flow regulating valve is low, and the valve is not easy to damage; of course, too low an amount of sewage may be handled by feeding a large amount of sewage to the first and second facultative tanks 5 and 6.
Optionally, as shown in fig. 1, the present application further includes a tank body, where the main water inlet pipe 7, the anaerobic tank 4, the anoxic tank 3, the aerobic tank 1, the first facultative tank 5, the second facultative tank 6, the sedimentation tank 11, the water outlet 13, the pre-anoxic tank 9, and the sludge concentration tank 10 are all disposed in the tank body. The whole sewage treatment device is arranged in a tank body, and the volume of the tank body can be designed according to the sewage treatment capacity; the sewage treatment device is all arranged in the tank body, has compact overall structure and is convenient for overall transportation and installation.
Specifically, as shown in fig. 1, the aerobic tank 1 is disposed at one end of the tank body, the sedimentation tank 11 and the water outlet 13 are disposed at the other end of the tank body, the first facultative tank 5 and the second facultative tank 6 are disposed side by side, one ends of the first facultative tank 5 and the second facultative tank 6 are connected with the aerobic tank 1, the other ends of the first facultative tank 5 and the second facultative tank 6 are connected with the sedimentation tank 11, the anoxic tank 3, the anaerobic tank 4, the front anoxic tank 9 and the sludge concentration tank 10 are sequentially disposed in an area between the first facultative tank 5 and the second facultative tank 6, the anoxic tank 3 is connected with the aerobic tank 1, and the front anoxic tank 9 is connected with the sedimentation tank 11. The two facultative tanks are arranged on two sides, so that the whole sewage treatment device has reasonable structural layout, small occupied space, convenient transportation, small installation occupied space, stronger adaptability to installation environment and convenient popularization and use in vast rural areas.
Optionally, the device further comprises a clear water tank 12, wherein the clear water tank 12 is arranged between the sedimentation tank 11 and the water outlet 13, and the supernatant liquid of the sedimentation tank 11 enters the water outlet 13 through the clear water tank 12. That is, the supernatant fluid after the sedimentation tank 11 is settled enters the clean water tank 12, and then enters the water outlet 13 from the clean water tank 12 to be discharged, the clean water tank 12 can play a certain role in buffering, and the sludge in the sedimentation tank 11 is placed to be discharged.
To facilitate an understanding of the present application, the following description will describe the main workflow of the present application with reference to fig. 2: after entering from the main water inlet pipe 7, 70% of sewage directly enters the bottom of the anaerobic tank 4, then sequentially enters the anoxic tank 3, the aerobic tank 1, the first facultative tank 5 or the second facultative tank 6, the sedimentation tank 11, the clear water tank 12 and the water outlet 13, and after exiting from the aerobic tank 1, the water in which facultative tank is in an operation state is seen, and then enters which facultative tank; supernatant fluid of the facultative tank enters a sedimentation tank 11, and part of reflux liquid enters a sludge concentration tank 10; supernatant of the sedimentation tank 11 enters a clean water tank 12, and the settled return sludge enters a sludge concentration tank 10; the supernatant of the sludge concentration tank 10 is sent to the anoxic tank 3, and the concentrated sludge is sent to the pre-anoxic tank 9 and then enters the anaerobic tank 4 from the pre-anoxic tank 9. The sewage is discharged from the water outlet 13 after the process treatment, and sludge, reflux liquid and the like in the sewage treatment device continue to participate in the subsequent sewage treatment process; the process aims at the situation that the sewage inlet amount is large, when the sewage inlet amount is small, 80% of sewage directly enters the running facultative tank, and enters the sedimentation tank 11 and the clear water tank 12 after the facultative tank is treated, and is discharged through the water outlet 13.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A sewage treatment method suitable for rural sewage flow variation, which is characterized by being suitable for a sewage treatment device, wherein the sewage treatment device comprises the following components sequentially arranged along the sewage flow direction: the device comprises a main water inlet pipe, an anaerobic tank, an anoxic tank, an aerobic tank, a first facultative tank/second facultative tank, a sedimentation tank and a water outlet, wherein a preposed anoxic tank is arranged at the upstream of the anaerobic tank, and a sludge concentration tank is arranged at the upstream of the preposed anoxic tank; the sludge in the sedimentation tank is conveyed into the sludge concentration tank, partial reflux liquid of the first facultative tank and partial reflux liquid of the second facultative tank are respectively introduced into the sludge concentration tank, supernatant liquid of the sludge concentration tank is introduced into the anoxic tank, and sludge in the sludge concentration tank enters the anaerobic tank through the front anoxic tank; the first facultative tank and the second facultative tank alternately operate;
the main water inlet pipe is respectively communicated with the front anoxic tank, the first facultative tank and the second facultative tank through a split pipeline, and the main water inlet pipe and the plurality of split pipelines are respectively connected to the bottoms of the anaerobic tank, the front anoxic tank, the first facultative tank and the second facultative tank, and the sewage quantity entering the anaerobic tank, the front anoxic tank, the first facultative tank and the second facultative tank can be adjusted;
the main water inlet pipe is provided with a flowmeter;
when the sewage flow entering the main water inlet pipe is larger than a set value, 70% of sewage is distributed to the anaerobic tank, and the rest of sewage is distributed to the front anoxic tank, the first facultative tank and the second facultative tank;
when the sewage flow entering the main water inlet pipe is smaller than a set value, 80% of sewage is distributed to the first facultative tank and the second facultative tank, and the rest of sewage is distributed to the front anoxic tank and the anaerobic tank.
2. The method for treating sewage according to claim 1, wherein the pre-anoxic tank, the anaerobic tank, the anoxic tank and the aerobic tank are all provided with an ultra-high level of not less than 0.3 m.
3. The sewage treatment method according to claim 1, wherein the liquid level of the main water inlet pipe is greater than the liquid level of each reaction tank, the liquid level of each reaction tank is greater than the liquid level of the water outlet, and the water outlet is connected with a flow regulating valve.
4. A sewage treatment method according to any one of claims 1 to 3, wherein the sewage treatment apparatus further comprises a tank body, and the main water inlet pipe, the anaerobic tank, the anoxic tank, the aerobic tank, the first facultative tank, the second facultative tank, the sedimentation tank, the water outlet, the pre-anoxic tank, and the sludge concentration tank are all disposed in the tank body.
5. The method according to claim 4, wherein the aerobic tank is disposed at one end of the tank, the sedimentation tank and the water outlet are disposed at the other end of the tank, the first facultative tank and the second facultative tank are disposed side by side, one ends of the first facultative tank and the second facultative tank are both connected to the aerobic tank, the other ends of the first facultative tank and the second facultative tank are both connected to the sedimentation tank, the anoxic tank, the anaerobic tank, the pre-anoxic tank, and the sludge concentration tank are sequentially disposed in an area between the first facultative tank and the second facultative tank, the anoxic tank is connected to the aerobic tank, and the pre-anoxic tank is connected to the sedimentation tank.
6. The wastewater treatment method according to claim 5, wherein the wastewater treatment apparatus further comprises a clean water tank disposed between the sedimentation tank and the water outlet, and wherein the supernatant of the sedimentation tank enters the water outlet through the clean water tank.
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| CN201810995232.3A CN108793409B (en) | 2018-08-29 | 2018-08-29 | Sewage treatment device suitable for rural sewage flow change |
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| CN201810995232.3A CN108793409B (en) | 2018-08-29 | 2018-08-29 | Sewage treatment device suitable for rural sewage flow change |
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