CN112939331A - Low-carbon sewage enhanced phosphorus removal device and sewage treatment system comprising same - Google Patents
Low-carbon sewage enhanced phosphorus removal device and sewage treatment system comprising same Download PDFInfo
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- CN112939331A CN112939331A CN202110079365.8A CN202110079365A CN112939331A CN 112939331 A CN112939331 A CN 112939331A CN 202110079365 A CN202110079365 A CN 202110079365A CN 112939331 A CN112939331 A CN 112939331A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000011574 phosphorus Substances 0.000 title claims abstract description 120
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 120
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 84
- 239000010865 sewage Substances 0.000 title claims abstract description 69
- 239000010802 sludge Substances 0.000 claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 239000012762 magnetic filler Substances 0.000 claims description 8
- 230000001546 nitrifying effect Effects 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 238000000855 fermentation Methods 0.000 claims description 4
- 230000004151 fermentation Effects 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims 2
- 241000894006 Bacteria Species 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000013589 supplement Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 229920001397 Poly-beta-hydroxybutyrate Polymers 0.000 description 2
- 229920000331 Polyhydroxybutyrate Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 description 2
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- JXBAVRIYDKLCOE-UHFFFAOYSA-N [C].[P] Chemical compound [C].[P] JXBAVRIYDKLCOE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- C02F3/28—Anaerobic digestion processes
-
- 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
Abstract
The invention relates to the technical field of sewage treatment, and discloses a low-carbon sewage enhanced phosphorus removal device and a sewage treatment system comprising the same, wherein the low-carbon sewage enhanced phosphorus removal device comprises a carbon source pool and a two-phase anaerobic phosphorus removal pool, and the carbon source pool is connected with the two-phase anaerobic phosphorus removal pool to supply a carbon source to the two-phase anaerobic phosphorus removal pool; the two-phase anaerobic phosphorus removal tank is connected with a sludge discharge port of the sedimentation tank so as to receive sludge discharged by the sedimentation tank; the two-phase anaerobic phosphorus removal tank is connected with the anaerobic tank, so that the sludge treated by the two-phase anaerobic phosphorus removal tank flows back to the anaerobic tank. The invention can realize that the supplementary carbon source is effectively and fully utilized by the high-concentration phosphorus removing bacteria in the two-phase anaerobic phosphorus removal tank under the condition of low carbon source in the inlet water, thereby improving the total phosphorus removal capability of the system.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a low-carbon sewage enhanced phosphorus removal device and a sewage treatment system comprising the same.
Background
Common municipal sewage treatment processes include Anaerobic-Anoxic-aerobic (A/A/O) treatment processes and modified processes thereof, and show good phosphorus removal performance in practical engineering. The technical key of the A/A/O treatment process is that enough organic carbon sources must be contained in sewage under anaerobic conditions to ensure that phosphorus-accumulating bacteria can achieve a good phosphorus release effect, and enough Polyhydroxyalkanoates (PHA) and poly-beta-hydroxybutyrate (PHB) are reserved for subsequent excessive phosphorus absorption. However, the carbon-phosphorus ratio in the inlet water of many existing sewage plants is far from insufficient, and especially the carbon source of the inlet water in south China is lower, so that the total phosphorus removal effect is poor.
At present, the C/P ratio is improved by adding an external carbon source at the water inlet end of sewage treatment, so that the total phosphorus of the effluent reaches the standard. However, in the sewage treatment process, the sludge concentration of each tank body is generally maintained at 2000-4000mg/L, the sludge concentration is not high, and the proportion of the phosphorus-accumulating bacteria in the flora is low, so that when an external carbon source is supplemented at a water inlet, the carbon source is inefficiently consumed by other bacteria due to insufficient anaerobic conditions of the anaerobic tank, the phosphorus-accumulating bacteria cannot utilize the external carbon source to the maximum extent, the carbon source adding amount is large, the cost is high, the enhanced phosphorus removal effect is poor, and the efficiency is not high.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a low-carbon sewage enhanced phosphorus removal device and a sewage treatment system including the same, so as to solve the problems of large carbon source dosage, high cost, poor enhanced phosphorus removal effect and low efficiency in the existing sewage phosphorus removal.
In order to achieve the purpose, the invention adopts the following technical scheme:
one aspect of the invention provides a low-carbon sewage enhanced phosphorus removal device for a sewage treatment system, wherein the sewage treatment system comprises an anaerobic tank and a sedimentation tank, and the low-carbon sewage enhanced phosphorus removal device comprises a carbon source tank and a two-phase anaerobic phosphorus removal tank, wherein the carbon source tank is connected with the two-phase anaerobic phosphorus removal tank to supply a carbon source to the two-phase anaerobic phosphorus removal tank; the two-phase anaerobic phosphorus removal tank is connected with a sludge discharge port of the sedimentation tank so as to receive sludge discharged by the sedimentation tank; the two-phase anaerobic phosphorus removal tank is connected with the anaerobic tank, so that the sludge treated by the two-phase anaerobic phosphorus removal tank flows back to the anaerobic tank.
Preferably, the carbon source in the carbon source pool is an acetic acid solution or a sludge fermentation broth comprising volatile fatty acids.
Preferably, magnetic fillers are arranged in the two-phase anaerobic phosphorus removal tank.
Preferably, suspended sludge is arranged in the two-phase anaerobic phosphorus removal tank.
Preferably, the concentration of the suspended sludge is 6-8 g/L.
Preferably, the chemical oxygen demand of the two-phase anaerobic phosphorus removal tank is 50-90 mg/L.
Preferably, stirring devices are arranged in the carbon source tank and the two-phase anaerobic phosphorus removal tank.
Another aspect of the present invention provides a sewage treatment system comprising: the low-carbon sewage enhanced phosphorus removal device comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially connected, wherein the anaerobic tank is provided with a water inlet and a sludge return port, the anoxic tank is provided with a nitrifying liquid return port, the nitrifying liquid return port is connected with the aerobic tank, the sedimentation tank is provided with a water outlet and a sludge outlet, and the two-phase anaerobic phosphorus removal tank in the low-carbon sewage enhanced phosphorus removal device is connected between the sludge outlet and the sludge return port.
Preferably, stirring devices are arranged in the anaerobic tank, the anoxic tank and the aerobic tank.
Preferably, the dissolved oxygen in the anoxic tank is 0.2-0.6 mg/L, and the reflux ratio of the nitrifying liquid in the anoxic tank is 100-400%.
Compared with the prior art, the low-carbon sewage enhanced phosphorus removal device and the sewage treatment system comprising the same have the beneficial effects that:
the low-carbon sewage enhanced phosphorus removal device provided by the embodiment of the invention is provided with the two-phase anaerobic phosphorus removal tank, and the carbon source is supplemented in the two-phase anaerobic phosphorus removal tank to carry out enhanced phosphorus removal, so that the supplemented carbon source can be effectively and fully utilized by high-concentration phosphorus removal bacteria in the two-phase anaerobic phosphorus removal tank under the condition of low carbon source in the inlet water, and the total phosphorus removal capability of the system is improved.
In addition, the invention can realize the screening and mass enrichment of the system on denitrifying phosphorus accumulating bacteria in the two-phase anaerobic phosphorus removal tank, is favorable for reducing the dependence of the low-carbon-source sewage treatment system on a carbon source, and improves the phosphorus removal stability of the low-carbon-source sewage treatment system.
Drawings
FIG. 1 is a schematic view of an apparatus for enhanced phosphorus removal from low-carbon wastewater according to an embodiment of the present invention;
FIG. 2 is a schematic view of the phosphorus removal effect of the sewage treatment system according to the embodiment of the present invention;
in the figure, 1, an anaerobic pool; 2. an anoxic tank; 3. an aerobic tank; 4. a sedimentation tank; 41. a water outlet; 42. a sludge discharge port; 5. a carbon source pool; 6. a two-phase anaerobic dephosphorization tank; 7. and (3) magnetic fillers.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The low-carbon sewage enhanced phosphorus removal device is applied to a sewage treatment system, in particular to a sewage treatment system with insufficient carbon source supplement amount at a water inlet end, and can be an urban sewage treatment system. The sewage treatment system at least comprises an anaerobic tank 1 and a sedimentation tank 4, wherein the anaerobic tank 1 is provided with a water inlet, and the sedimentation tank 4 is provided with a water outlet 41 and a sludge discharge outlet 42.
As shown in fig. 1, a low-carbon sewage enhanced phosphorus removal device according to a preferred embodiment of the present invention includes a carbon source tank 5 and a two-phase anaerobic phosphorus removal tank 6, wherein the carbon source tank 5 is connected to the two-phase anaerobic phosphorus removal tank 6 to supply a carbon source to the two-phase anaerobic phosphorus removal tank 6; the two-phase anaerobic phosphorus removal tank 6 is connected with a sludge discharge port 42 of the sedimentation tank 4 so as to receive sludge discharged from the sedimentation tank 4; the two-phase anaerobic phosphorus removal tank 6 is connected with the anaerobic tank 1, so that the sludge treated by the two-phase anaerobic phosphorus removal tank 6 flows back to the anaerobic tank 1.
According to the invention, the carbon source is supplemented into the two-phase anaerobic phosphorus removal tank 6 through the carbon source tank 5, so that the problem of insufficient carbon source supplement at the water inlet end can be solved, the supplemented carbon source can be effectively and fully utilized by high-concentration phosphorus removal bacteria in the two-phase anaerobic phosphorus removal tank 6, and the phosphorus removal capability is improved.
In the present invention, the two phases in the two-phase anaerobic phosphorus removal tank mean that the two-phase anaerobic phosphorus removal tank contains both the microbes which are fixedly grown and the microbes which are suspended in the tank body.
Preferably, the carbon source in the carbon source pool 5 is an acetic acid solution or a sludge fermentation broth including Volatile Fatty Acids (VFAs).
In the present invention, parameters such as the concentration of the acetic acid solution are not particularly limited.
In an alternative embodiment, the two-phase anaerobic phosphorus removal tank 6 is provided with magnetic fillers 7, and the magnetic fillers can be fixed in the two-phase anaerobic phosphorus removal tank 6 by using brackets, wherein the surface of the magnetic fillers 7 is enriched with microorganisms for capturing and removing oxygen in an ionic state (such as oxygen of NOx) so as to keep the oxidation-reduction potential of the tank in a strict anaerobic range all the time. The magnetic filler is a polymer three-dimensional elastic filler or a suspension filler filled with magnetic powder, and the surface of the filler has a magnetic field intensity of 2-10 mT. The filling proportion of the magnetic filler is preferably 10% to 50%.
In an alternative embodiment, suspended sludge is disposed in the two-phase anaerobic phosphorus removal tank 6, and the suspended sludge is in a suspended state and is uniformly distributed in the two-phase anaerobic phosphorus removal tank 6. Further, the concentration of the suspended sludge is 6-8 g/L, and the retention time of the suspended sludge is 1-3 h.
In an alternative embodiment, the Chemical Oxygen Demand (COD) of the two-phase anaerobic dephosphorization pool 6 is 50-90 mg/L.
In an optional embodiment, stirring devices are arranged in the carbon source tank 5 and the two-phase anaerobic phosphorus removal tank 6 to accelerate the reaction of sludge fermentation, so that the sludge-water mixed liquid and phosphorus removal bacteria are in full contact reaction in the two-phase anaerobic phosphorus removal tank, and the phosphorus removal effect is improved.
As shown in fig. 1, the sewage treatment system according to the embodiment of the present invention includes the low-carbon sewage enhanced phosphorus removal device, and an anaerobic tank 1, an anoxic tank 2, an aerobic tank 3, and a sedimentation tank 4, which are sequentially connected to each other, wherein the anaerobic tank 1 is provided with a water inlet and a sludge return port, the anoxic tank 2 is provided with a nitrifying liquid return port, the nitrifying liquid return port is connected to the aerobic tank 3, the sedimentation tank 4 is provided with a water outlet 41 and a sludge outlet 42, and a two-phase anaerobic phosphorus removal tank 6 in the low-carbon sewage enhanced phosphorus removal device is connected between the sludge outlet 42 and the sludge return port.
The sewage treatment system solves the problem of insufficient carbon source supplement at the water inlet end through the low-carbon sewage reinforced phosphorus removal device, reduces the dependence of the sewage treatment system on the carbon source at the water inlet end, and can improve the phosphorus removal effect of the system.
It should be noted that the sewage treatment system of the present invention employs an anaerobic-anoxic-aerobic treatment process, which belongs to the conventional treatment processes, and the present invention is not described in detail herein.
In an alternative embodiment, stirring devices are arranged in the anaerobic tank 1, the anoxic tank 2 and the aerobic tank 3.
In an alternative embodiment, the dissolved oxygen of the anaerobic pool 1 is 0 mg/L; the dissolved oxygen in the anoxic pond 2 is 0.2-0.6 mg/L; the dissolved oxygen of the aerobic tank 3 is not less than 2.0 mg/L. The reflux ratio of the nitrifying liquid in the anoxic pond 2 is 100-400%, and the hydraulic retention time is 2-4 h; the hydraulic retention time of the aerobic tank 3 is 6-10 h; the sludge reflux ratio of the sedimentation tank 4 is 50-100%, wherein the sludge in the sedimentation tank 4 flows back to the two-phase anaerobic phosphorus removal tank 6.
The working process of the sewage treatment system comprises the following steps:
the sewage enters from a water inlet of the anaerobic tank 1, and after being treated by the anaerobic tank 1, the anoxic tank 2 and the aerobic tank 3 in sequence, part of the nitrified liquid sludge water flows back to the anoxic tank 2, and the other part of the nitrified liquid sludge water enters the sedimentation tank 4. The nitrified liquid sludge and water are subjected to sludge-water separation in the sedimentation tank 4, the supernatant liquid suspended above is discharged through the water discharge port, and the sludge precipitated below is discharged through the sludge discharge port 42. And part of the sludge discharged from the sludge discharge port 42 flows back to the two-phase anaerobic phosphorus removal tank 6, and the other part of the sludge is discharged as residual sludge. Adding a certain amount of carbon source into the two-phase anaerobic phosphorus removal tank 6, so that the sludge is subjected to phosphorus accumulating bacteria screening treatment in the two-phase anaerobic phosphorus removal tank 6, and the treated sludge flows back into the anaerobic tank 1, so that the sewage treatment cycle process is completed.
As shown in fig. 2, the sewage treatment system of the present invention is used for sewage treatment to obtain a Total Phosphorus amount-time change graph, and the result shows that under the condition of low carbon source inlet water (C/N is 3, C/P is 31), a carbon source is supplemented to the two-phase anaerobic Phosphorus removal tank 6, when COD is not less than 21mg/L, the biological Phosphorus removal performance of the system is stable, and the Total Phosphorus amount (TP) of the effluent stably reaches the first-level a discharge standard (as shown in the third stage in fig. 2).
To sum up, compared with the prior art, the embodiment of the invention provides a low-carbon sewage enhanced phosphorus removal device and a sewage treatment system comprising the same, and the low-carbon sewage enhanced phosphorus removal device has the beneficial effects that:
the low-carbon sewage enhanced phosphorus removal device provided by the embodiment of the invention is provided with the two-phase anaerobic phosphorus removal tank 6, and the carbon source is supplemented in the two-phase anaerobic phosphorus removal tank 6 to carry out enhanced phosphorus removal, so that the supplemented carbon source can be effectively and fully utilized by the high-concentration phosphorus removal bacteria in the two-phase anaerobic phosphorus removal tank 6 under the condition of low carbon source in the inlet water, and the total phosphorus removal capability of the system is improved.
In addition, the invention can realize the screening and mass enrichment of the denitrification phosphorus-accumulating bacteria in the two-phase anaerobic phosphorus removal tank 6, is favorable for reducing the dependence of the low-carbon source sewage treatment system on a carbon source, and improves the phosphorus removal stability of the low-carbon source sewage treatment system.
The invention can realize better phosphorus removal effect under the condition of less external carbon source supplement amount.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A low-carbon sewage enhanced phosphorus removal device is used for a sewage treatment system, the sewage treatment system comprises an anaerobic tank and a sedimentation tank, and is characterized in that,
the low-carbon sewage enhanced phosphorus removal device comprises a carbon source tank and a two-phase anaerobic phosphorus removal tank, wherein the carbon source tank is connected with the two-phase anaerobic phosphorus removal tank so as to supply a carbon source to the two-phase anaerobic phosphorus removal tank; the two-phase anaerobic phosphorus removal tank is connected with a sludge discharge port of the sedimentation tank so as to receive sludge discharged by the sedimentation tank; the two-phase anaerobic phosphorus removal tank is connected with the anaerobic tank, so that the sludge treated by the two-phase anaerobic phosphorus removal tank flows back to the anaerobic tank.
2. The low-carbon sewage enhanced phosphorus removal device of claim 1, wherein the carbon source in the carbon source tank is an acetic acid solution or a sludge fermentation broth comprising volatile fatty acids.
3. The reinforced phosphorus removal device for low-carbon sewage of claim 1, wherein a magnetic filler is arranged in the two-phase anaerobic phosphorus removal tank.
4. The low-carbon sewage enhanced phosphorus removal device of claim 1, wherein suspended sludge is disposed in the two-phase anaerobic phosphorus removal tank.
5. The device for enhanced phosphorus removal from low-carbon sewage of claim 4, wherein the concentration of the suspended sludge is 6-8 g/L.
6. The low-carbon sewage enhanced phosphorus removal device of claim 1, wherein the chemical oxygen demand of the two-phase anaerobic phosphorus removal tank is 50-90 mg/L.
7. The low-carbon sewage enhanced phosphorus removal device of claim 1, wherein stirring devices are arranged in both the carbon source tank and the two-phase anaerobic phosphorus removal tank.
8. A wastewater treatment system, comprising:
the low-carbon sewage enhanced phosphorus removal device as defined in any one of claims 1 to 7, and an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank which are connected in sequence,
the anaerobic tank is provided with a water inlet and a sludge return port, the anoxic tank is provided with a nitrifying liquid return port, the nitrifying liquid return port is connected with the aerobic tank, the sedimentation tank is provided with a water outlet and a sludge outlet, and the two-phase anaerobic phosphorus removal tank in the low-carbon sewage enhanced phosphorus removal device is connected between the sludge outlet and the sludge return port.
9. The wastewater treatment system according to claim 8, wherein stirring devices are disposed in the anaerobic tank, the anoxic tank and the aerobic tank.
10. The sewage treatment system of claim 8, wherein the dissolved oxygen in the anoxic tank is 0.2-0.6 mg/L, and the reflux ratio of the nitrified liquid in the anoxic tank is 100-400%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110079365.8A CN112939331A (en) | 2021-01-20 | 2021-01-20 | Low-carbon sewage enhanced phosphorus removal device and sewage treatment system comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110079365.8A CN112939331A (en) | 2021-01-20 | 2021-01-20 | Low-carbon sewage enhanced phosphorus removal device and sewage treatment system comprising same |
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| CN112939331A true CN112939331A (en) | 2021-06-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880090A (en) * | 2010-02-03 | 2010-11-10 | 王鹤立 | Multifunctional complete-set sewage processing method and device |
| CN102531298A (en) * | 2012-03-02 | 2012-07-04 | 北京工业大学 | Sewage treatment device and method for enhanced denitrification A/A/O (Anodic Aluminum Oxide) and deoxygenation BAF (Biological Aerated Filter) |
| CN109879532A (en) * | 2019-03-05 | 2019-06-14 | 王超 | A kind of double mud and sewage processing systems and method |
| CN111547846A (en) * | 2020-04-07 | 2020-08-18 | 中圣环境科技发展有限公司 | By-pass flow type biological phosphorus removal process |
-
2021
- 2021-01-20 CN CN202110079365.8A patent/CN112939331A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880090A (en) * | 2010-02-03 | 2010-11-10 | 王鹤立 | Multifunctional complete-set sewage processing method and device |
| CN102531298A (en) * | 2012-03-02 | 2012-07-04 | 北京工业大学 | Sewage treatment device and method for enhanced denitrification A/A/O (Anodic Aluminum Oxide) and deoxygenation BAF (Biological Aerated Filter) |
| CN109879532A (en) * | 2019-03-05 | 2019-06-14 | 王超 | A kind of double mud and sewage processing systems and method |
| CN111547846A (en) * | 2020-04-07 | 2020-08-18 | 中圣环境科技发展有限公司 | By-pass flow type biological phosphorus removal process |
Non-Patent Citations (1)
| Title |
|---|
| 房俊东编: "《攀登者的足迹》", 华南理工大学出版社, pages: 61 * |
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Application publication date: 20210611 |