CN211570251U - Preposed denitrification sewage treatment device - Google Patents
Preposed denitrification sewage treatment device Download PDFInfo
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- CN211570251U CN211570251U CN201922401197.0U CN201922401197U CN211570251U CN 211570251 U CN211570251 U CN 211570251U CN 201922401197 U CN201922401197 U CN 201922401197U CN 211570251 U CN211570251 U CN 211570251U
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- 239000010865 sewage Substances 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000010802 sludge Substances 0.000 claims abstract description 72
- 238000010992 reflux Methods 0.000 claims abstract description 20
- 244000005700 microbiome Species 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000010801 sewage sludge Substances 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 239000000969 carrier Substances 0.000 description 6
- 238000011001 backwashing Methods 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241001052560 Thallis Species 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to the technical field of sewage treatment, and discloses a preposed denitrification sewage treatment device, which comprises an anoxic tank, an aerobic tank and a reflux tank, wherein overflow plates are arranged on the side surfaces of the anoxic tank and the aerobic tank, a sludge water outlet groove and a sewage water outlet groove are respectively arranged behind the overflow plates, a sewage sludge outlet is arranged at the bottom of the sludge water outlet groove, and the upper water outlets of the sludge water outlet groove and the sewage water outlet groove of the anoxic tank are communicated with the aerobic tank through water pipes; the sludge water outlet groove of the aerobic tank and the water outlet at the upper part of the sewage water outlet groove are communicated to the reflux tank through water pipes; the preposed denitrification sewage treatment device belongs to a moving bed bioreactor, can fully utilize the volume of a reaction tank, has small head loss, does not need back flushing, does not need the backflow of the tank, has uniform carrier distribution, reliable operation and simple operation.
Description
Technical Field
The utility model relates to a sewage treatment technical field, concretely relates to leading denitrification sewage treatment plant.
Background
The preposed denitrification is a denitrification process with a denitrification reactor placed at the head of the system, is a process flow initiated in the early 7 th century, and is mainly characterized in that the denitrification reactor is placed at the head of the system, so the preposed denitrification process is also called a preposed denitrification biological denitrification system.
The preposed denitrification process is characterized in that sewage firstly enters an anoxic tank and then enters an aerobic tank, and mixed liquid in the aerobic tank and sludge in a sedimentation tank simultaneously flow back to the anoxic tank; the mixed liquid flows back to make the anoxic tank obtain nitrate generated by nitrification in the aerobic tank. The raw sewage directly enters the anoxic tank, and sufficient carbon source organic matters are provided for the denitrification of the anoxic tank, so that the denitrification reaction can be carried out in the anoxic tank.
The preposed denitrification reactor generally adopts a biological filter as an aerobic reactor, integrates biological adsorption, oxidation and physical interception, and is designed and used in a mode of adopting a fixed bed, a granular filter material or a biological sludge self-aggregation group as a biological carrier. The fixed bed biological carrier has limited microorganism attachment and relatively large floor area, and is not beneficial to capacity expansion. The granular filter material has the defects of large head loss, easy blockage of the filter and frequent backwashing. The biological sludge self-aggregation group carrier is not easy to control in the operation process, the loss and the loss of thalli of the biological sludge are easy to cause, the subsequent sludge separation and backflow are needed, and the effluent SS is not easy to control.
An anoxic reactor of a preposed denitrification reactor generally comprises two types of granular filter materials and biological sludge self-aggregation groups as carriers, wherein the granular filter materials also have the defects of large head loss, easy blockage of a filter and frequent backwashing; and the biological sludge self-aggregation carriers are easy to lose and lose thalli.
For example, the application number CN2102334581.7 'A preposed denitrification aeration biological filter' uses soft filler and ceramsite filler as microorganism carriers, and needs to be provided with a special back washing device and carry out back washing periodically.
For example, as pointed out in works in Fei Li and so on of problems and solutions arising in the debugging of the pre-denitrification biological aerated filter in volume 25, volume 11, 6 months, 28 of China: the sludge loss causes that the SS of the effluent of the hydrolysis acidification tank is too high, the hydrolysis acidification effect is insufficient, the impurities in the filter material layer are more, the height of the filter material layer is increased to cause head loss, the filter material holes are blocked or the filter material holes are not standard to cause uneven backwashing, the problems of hardening and the like of the filter material part occur occasionally, and troubles are caused to production and debugging.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a not enough to prior art exists, the utility model aims to provide a leading denitrification sewage treatment plant, this leading denitrification sewage treatment plant belongs to and removes bed bioreactor, can make full use of reaction tank volume, and the head loss is little, need not the back flush, does not need this pond backward flow, and the carrier distribution is even, and the operation is reliable, easy operation.
In order to achieve the above object, the present invention provides the following technical solutions:
a pre-denitrification sewage treatment device comprises an anoxic tank, an aerobic tank and a return tank, wherein overflow plates are arranged on the side surfaces of the anoxic tank and the aerobic tank, a sludge water outlet groove and a sewage water outlet groove are respectively arranged behind the overflow plates, a sewage sludge outlet is arranged at the bottom of the sludge water outlet groove, and water outlets at the upper parts of the sludge water outlet groove and the sewage water outlet groove of the anoxic tank are communicated to the aerobic tank through water pipes; and the sludge water outlet groove of the aerobic tank and the water outlet at the upper part of the sewage water outlet groove are communicated to the reflux tank through water pipes.
Preferably, the bottom of the sewage outlet tank is inclined, is communicated with the anoxic tank or the aerobic tank, and is used for returning the precipitated sludge to the anoxic tank or the aerobic tank.
Preferably, a baffle is arranged at the outlet of the sewage outlet tank.
Preferably, anaerobic microorganism carriers are arranged in the anoxic pond, and the anaerobic microorganism carriers are diatomite.
Preferably, the aerobic tank is internally provided with a high-efficiency micropore air distributor which is externally connected with an air blower.
Preferably, a sludge partition plate is arranged in the backflow tank to divide the backflow tank into a water outlet area and a water return area.
Preferably, the water outlet area is provided with a clear water outlet for outputting water reaching the standard; the return water area is provided with a return port which is connected with a return water inlet at the bottom of the anoxic tank through a return pump.
Preferably, the position of the water outlet of the anoxic tank is higher than that of the aerobic tank; the water outlet of the aerobic tank is higher than the reflux tank.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a leading denitrification sewage treatment plant belongs to and removes bed bioreactor, can make full use of reaction tank volume, and head loss is little, need not the back flush, does not need this pond backward flow, and the carrier distribution is even, and the operation is reliable, easy operation. Meanwhile, the mass transfer area of microorganisms and sewage pollutants is increased in the fluidization process, the mass transfer rate is increased, the interphase mass transfer process is enhanced, and the utilization efficiency of oxygen is also improved in the aerobic tank.
Drawings
FIG. 1 is a schematic structural diagram of a pre-denitrification sewage treatment device.
FIG. 2 is a block diagram of the flow of a pre-denitrification sewage treatment plant.
In the drawings: 1-anoxic tank, 2-aerobic tank, 3-reflux tank, 301-water outlet zone, 302-water return zone, 4-overflow plate, 5-sludge water outlet tank, 501-sludge discharge outlet, 6-sewage water outlet tank, 7-baffle, 8-high efficiency microporous air distributor, 9-blower, 10-sludge baffle, 11-reflux pump and 12-submersible mixer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 2, a preferred embodiment of the present invention provides a pre-denitrification sewage treatment device, which includes an anoxic tank 1, an aerobic tank 2 and a reflux tank 3, wherein the anoxic tank 1 is a conical bottom circular or a pointed bottom rectangular, and a submersible mixer 12 is disposed therein, and the submersible mixer 12 is an existing device and mainly plays a role in mixing sewage in the anoxic tank 1.
The side surfaces of the anoxic tank 1 and the aerobic tank 2 are provided with overflow plates 4, a sludge water outlet tank 5 and a sewage water outlet tank 6 are respectively arranged behind the overflow plates 4, the bottom of the sludge water outlet tank 5 is provided with a sludge discharge outlet 501, and the water outlets at the upper parts of the sludge water outlet tank 5 and the sewage water outlet tank 6 of the anoxic tank 1 are communicated to the aerobic tank 2 through water pipes; the upper water outlets of the sludge water outlet tank 5 and the sewage water outlet tank 6 of the aerobic tank 2 are communicated with the reflux tank 3 through water pipes. After entering the anoxic tank 1 and the aerobic tank 2, sewage enters the sludge water outlet tank 5 and the sewage water outlet tank 6 through the overflow plate 4, the sludge water outlet tank 5 is also in a conical bottom circular shape, sludge is settled at the bottom of the sludge water outlet tank 5 and is discharged from the sewage sludge outlet 501, and upper clear water enters the sewage water outlet tank 6 or the reflux tank 3 respectively.
In the embodiment, the bottom of the sewage outlet tank 6 is inclined, and is communicated with the anoxic tank 1 or the aerobic tank 2, so as to return the precipitated sludge to the anoxic tank 1 or the aerobic tank 2; the arrangement is that the sludge entering the sewage outlet groove 6 is returned to the anoxic tank 1 or the aerobic tank 2 from the inclined plane. Furthermore, a baffle 7 is arranged at the outlet of the sewage water outlet groove 6 to isolate the influence of the partial submersible mixer 12 on the sewage water outlet groove 6 during working, so that the sewage and sludge in the sewage water outlet groove 6 can be conveniently layered.
In the present embodiment, an anaerobic microorganism carrier is disposed in the anoxic tank 1, and the anaerobic microorganism carrier is diatomite. Adopting refined diatomite as an anaerobic microorganism and an aerobic microorganism carrier to carry out sewage denitrification treatment; the diatomite is composed of a diatom shell made of non-conductive amorphous silicon dioxide and superconducting diatom nanometer micropores, unbalanced electric potential is formed on the surface of diatom, pollutants are rapidly and physically flocculated and precipitated in the water treatment process, and the diatom has a strong adsorption force due to the fact that the specific surface area of the diatom is 6 square meters per gram, ultrafine particle substances are adsorbed to the surface of the diatom, the utilization efficiency of the microorganisms on the pollutants is improved, the sewage treatment efficiency of equipment is improved, and compared with other biological treatment process facilities, the sewage treatment device with the same treatment capacity occupies a smaller area and has high land utilization rate. Meanwhile, the diatomite has a self-dewatering function, can be quickly separated from a water body in the process of not applying stirring power, has good settleability, is easy for solid-liquid separation, and reduces the difficulty of sludge separation. The sludge produced after the sewage is treated by the diatomite has no peculiar smell and low water content, and can be recycled.
In the embodiment, the aerobic tank 2 is internally provided with a high-efficiency micropore air distributor 8, the high-efficiency micropore air distributor 8 is externally connected with an air blower 9, the air blower 9 works to enable air to enter the aerobic tank 2 from the high-efficiency micropore air distributor 8, and the aerobic microorganisms are facilitated to digest pollutants.
In this embodiment, a sludge partition plate 10 is disposed in the backflow tank 3 to divide the backflow tank 3 into a water outlet area 301 and a water return area 302, the water outlet area 301 is provided with a clear water outlet, sewage in the backflow tank 3 is detected, and after the sewage reaches a discharge standard, standard water is discharged; the return water area 302 is provided with a return port and is connected with a return water inlet at the bottom of the anoxic pond 1 through a return pump 11.
In the embodiment, the position of the water outlet of the anoxic tank 1 is higher than that of the aerobic tank 2, and the water outlet of the anoxic tank 1 can automatically flow into the aerobic tank 2 by utilizing a self water head; the water outlet of the aerobic tank 2 is higher than that of the reflux tank 3, and the water outlet of the aerobic tank 1 can automatically flow into the reflux tank 2 by utilizing a water head of the aerobic tank.
The operation process comprises the following steps:
1. after the sewage is pretreated by slag discharge, pH value adjustment, carbon source addition and the like, a water inlet at the bottom of the anoxic tank 1 enters the anoxic tank 1, and the submersible stirrer 12 is started.
2. The sewage in the anoxic tank 1 automatically flows to the aerobic tank 2 through the sewage outlet groove 6, the sludge in the sewage outlet groove 6 is settled back to the anoxic tank 1 through the inclined plane, and the blower 9 is opened to supply oxygen for aerobic microorganisms in the aerobic tank 2.
3. The sewage in the aerobic tank 2 flows to the reflux tank 3 through the sewage outlet tank 6, and the sludge in the sewage outlet tank 6 is settled back to the aerobic tank 2 through the inclined plane.
4. Sewage in the reflux pool 3 enters the anoxic pool 1 from a reflux water inlet at the bottom of the anoxic pool 1 through a reflux pump 11, and the partially treated sewage is discharged from a clear water outlet after passing through a sludge partition plate 10.
5. When the sludge sedimentation ratio in the anoxic tank 1 rises to a certain degree, sludge discharge is started, sewage in the anoxic tank 1 automatically flows to the aerobic tank 2 by using a sludge water outlet tank 5, and sludge in the sludge water outlet tank 5 is settled in the sludge water outlet tank 5 through an inclined plane; when the sludge sedimentation ratio in the anoxic tank 1 is reduced to a certain degree, the sludge discharge is finished, the sewage in the anoxic tank 1 automatically flows to the aerobic tank 2 by using the sewage outlet tank 6, and the sludge in the sewage outlet tank 6 is settled back to the anoxic tank 1 through an inclined plane; when the sludge in the sludge water outlet tank 5 reaches a certain amount, the sludge is discharged and is discharged into a sludge treatment system.
6. When the sludge sedimentation ratio in the aerobic tank 2 is raised to a certain degree, sludge discharge is started, sewage in the aerobic tank 2 automatically flows to the reflux tank 3 by using the sludge water outlet tank 5, and sludge in the sludge water outlet tank 5 is settled in the sludge water outlet tank 5 through an inclined plane; when the sludge sedimentation ratio in the aerobic tank 2 is reduced to a certain degree, the sludge discharge is finished, the sewage in the aerobic tank 2 automatically flows to the reflux tank 3 by using the sewage outlet tank 6, and the sludge in the sewage outlet tank 6 is settled back to the aerobic tank 2 through the inclined plane; when the sludge in the sludge water outlet tank 5 reaches a certain amount, the sludge is discharged and is discharged into a sludge treatment system.
The sewage treatment device belongs to a moving bed bioreactor, can fully utilize the volume of a reaction tank, has small head loss, does not need back flushing, does not need the backflow of the tank, has uniform distribution of carriers, reliable operation and simple operation.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.
Claims (8)
1. A preposed denitrification sewage treatment device is characterized by comprising an anoxic tank (1), an aerobic tank (2) and a reflux tank (3), wherein overflow plates (4) are arranged on the side surfaces of the anoxic tank (1) and the aerobic tank (2), a sludge water outlet groove (5) and a sewage water outlet groove (6) are respectively arranged behind the overflow plates (4), a sludge discharge outlet (501) is arranged at the bottom of the sludge water outlet groove (5), and water outlets at the upper parts of the sludge water outlet groove (5) and the sewage water outlet groove (6) of the anoxic tank (1) are communicated to the aerobic tank (2) through water pipes; and the water outlets at the upper parts of the sludge water outlet groove (5) and the sewage water outlet groove (6) of the aerobic tank (2) are communicated with the reflux tank (3) through water pipes.
2. The pre-denitrification sewage treatment device according to claim 1, wherein the bottom of the sewage outlet tank (6) is inclined and is communicated with the anoxic tank (1) or the aerobic tank (2) for returning the precipitated sludge to the anoxic tank (1) or the aerobic tank (2).
3. The pre-denitrification sewage treatment device according to claim 2, wherein a baffle (7) is arranged at the outlet of the sewage outlet tank (6).
4. The pre-denitrification sewage treatment device according to claim 1, wherein the anaerobic microorganism carrier is diatomite in the anoxic tank (1).
5. The pre-denitrification sewage treatment device according to claim 1, wherein the aerobic tank (2) is internally provided with a high-efficiency microporous air distributor (8), and the high-efficiency microporous air distributor (8) is externally connected with a blower (9).
6. The advanced denitrification sewage treatment plant according to claim 1, wherein a sludge baffle (10) is arranged in the return tank (3) to divide the return tank (3) into a water outlet zone (301) and a water return zone (302).
7. The advanced denitrification sewage treatment plant according to claim 6, wherein the water outlet zone (301) is provided with a clean water outlet for outputting the standard water; the return water area (302) is provided with a return port and is connected with a return water inlet at the bottom of the anoxic tank (1) through a return pump (11).
8. The advanced denitrification sewage treatment plant as set forth in claim 1, wherein the water outlet of the anoxic tank (1) is positioned higher than the aerobic tank (2); the water outlet of the aerobic tank (2) is higher than the reflux tank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922401197.0U CN211570251U (en) | 2019-12-27 | 2019-12-27 | Preposed denitrification sewage treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922401197.0U CN211570251U (en) | 2019-12-27 | 2019-12-27 | Preposed denitrification sewage treatment device |
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| CN211570251U true CN211570251U (en) | 2020-09-25 |
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| CN201922401197.0U Active CN211570251U (en) | 2019-12-27 | 2019-12-27 | Preposed denitrification sewage treatment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115724528A (en) * | 2022-11-15 | 2023-03-03 | 四川省生态环境科学研究院 | Sewage treatment plant based on preposition denitrification |
| CN118771597A (en) * | 2024-07-31 | 2024-10-15 | 中盐勘察设计院有限公司 | Household non-powered sewage treatment system |
-
2019
- 2019-12-27 CN CN201922401197.0U patent/CN211570251U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115724528A (en) * | 2022-11-15 | 2023-03-03 | 四川省生态环境科学研究院 | Sewage treatment plant based on preposition denitrification |
| CN118771597A (en) * | 2024-07-31 | 2024-10-15 | 中盐勘察设计院有限公司 | Household non-powered sewage treatment system |
| CN118771597B (en) * | 2024-07-31 | 2026-02-06 | 中盐勘察设计院有限公司 | Domestic unpowered sewage treatment system |
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