CN113697941A - Device for reducing floating sludge of up-flow anaerobic ammonia oxidation reactor - Google Patents
Device for reducing floating sludge of up-flow anaerobic ammonia oxidation reactor Download PDFInfo
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- CN113697941A CN113697941A CN202111097906.6A CN202111097906A CN113697941A CN 113697941 A CN113697941 A CN 113697941A CN 202111097906 A CN202111097906 A CN 202111097906A CN 113697941 A CN113697941 A CN 113697941A
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- floating sludge
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- sludge
- oxidation reactor
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- 239000010802 sludge Substances 0.000 title claims abstract description 67
- 238000007667 floating Methods 0.000 title claims abstract description 40
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 230000003647 oxidation Effects 0.000 title claims abstract description 25
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 25
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 20
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241001453382 Nitrosomonadales Species 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
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- 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
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
-
- 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
- C02F3/006—Regulation methods for biological treatment
-
- 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
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
- C02F3/2866—Particular arrangements for anaerobic reactors
- C02F3/2873—Particular arrangements for anaerobic reactors with internal draft tube circulation
-
- 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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
-
- 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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- 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
- C02F2301/04—Flow arrangements
Abstract
The invention provides a device for reducing floating sludge of an up-flow anaerobic ammonia oxidation reactor, which comprises an observation window capable of observing a floating sludge layer, an air receiving pipe penetrating through a gas-liquid interface, a plurality of water suction ports positioned at the lower part of the floating sludge layer, a water pump and a water inlet end of the reactor, wherein the tail ends of the plurality of water suction ports are converged with the tail end of the air receiving pipe through a pipeline and then are communicated with the water pump, and the water pump is communicated with the water inlet end of the reactor. The floating sludge is recycled into the reactor, the impeller of the water pump is used for stirring and eliminating micro bubbles in the sludge, the density or granularity of the floating sludge is improved through repeated circulation in the reactor, the interception rate of the floating sludge in the reactor is increased, and the floating sludge in the reactor is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of anaerobic ammonia oxidation treatment devices, and particularly relates to a device for reducing floating sludge of an upflow anaerobic ammonia oxidation reactor.
Background
With the vigorous development of anaerobic digestion treatment in China, how to efficiently treat ammonia nitrogen in anaerobic digestion biogas slurry becomes a main problem. Oxygen and an organic carbon source are consumed for removing ammonia nitrogen through traditional nitrification-denitrification, but C/N of anaerobic digestion biogas slurry is low, a large amount of carbon source needs to be added for nitrogen removal in the traditional process, and treatment cost is high.
Anammox means that under anaerobic or anoxic conditions, the microorganism reacts with NH4+-N is an electron donor, with NO2-N is an electron acceptor, NH4+-N and NO2Conversion of-N to N2Compared with the traditional denitrification process, the anaerobic ammonia oxidation process does not need to supplement oxygen, belongs to a complete autotrophic process, can save the oxygen supply cost, does not need to add an organic carbon source, and can greatly reduce the construction investment and the operation cost of denitrification.
The anaerobic ammonia oxidation process is particularly suitable for treating high ammonia nitrogen wastewater, and the technology has been applied in engineering at home and abroad. However, the growth rate of the anammox bacteria is very slow, and the doubling time is more than 11 days, so that the start-up of the anammox reactor takes very long (>6 months), and a large amount of time is needed for load lifting and system stabilization. In order to shorten the starting time of the reactor and improve the sludge concentration in the reactor, the key is that the anaerobic ammonia oxidation process generates gas, so that the problem that the granular sludge floats upwards easily occurs in a granular sludge type upflow anaerobic sludge reactor with higher volume load, so that a plurality of anaerobic ammonia oxidation sludge floats upwards to the surface layer of the water surface and does not participate in the anaerobic ammonia oxidation process, and the rapid increase of the sludge concentration or the maintenance of the high sludge concentration is obviously influenced for anaerobic ammonia oxidizing bacteria with slow growth rate. Therefore, how to effectively recycle the floating sludge is an important link for efficiently operating the granular sludge type anaerobic ammonia oxidation reactor.
Disclosure of Invention
Aiming at the problems that the floating sludge accumulated on a gas-liquid separation interface of an upflow anaerobic sludge reactor causes the loss of anaerobic ammonium oxidation sludge and does not participate in the anaerobic ammonium oxidation process, the invention provides a method for recovering the floating sludge into the reactor by utilizing a water pump to absorb water, micro bubbles in the sludge are eliminated by stirring through the water pump, the density or granularity of the sludge is improved through circulation in the reactor, the retention rate of the sludge in the reactor is increased, and the floating sludge of the upflow anaerobic ammonium oxidation reactor is greatly reduced.
The invention provides the following technical scheme: the utility model provides a reduce device of STREAMING anaerobic ammonium oxidation reactor come-up mud, the reactor sets up in come-up sludge blanket department, and come-up sludge blanket is located the gas-liquid interface department of high ammonia nitrogen waste water, the reactor is including can observing the observation window on come-up sludge blanket, the reactor still includes the air-liquid interface in the through-flow anaerobic ammonium oxidation reactor connect empty pipe, be located a plurality of water sucking mouth, water pump, the reactor end of intaking of come-up sludge blanket lower part, the end of a plurality of water sucking mouth through the connecting tube with connect after empty pipe the end collects with the water pump intercommunication in the lump, the water pump with the reactor end intercommunication of intaking.
Further, the height of the observation window is 50-100 cm.
Furthermore, the plurality of water suction ports (3) are arranged 2-50cm below the gas-liquid interface, and the distance between the water suction ports and the gas-liquid interface can be adjusted.
Furthermore, the water suction ports (3) are in a shape of an inverted cone funnel; the diameter of the section where the bottom edge of each water suction port (3) is located is 10-200mm, and the ratio of the diameter of the section of the bottom to the height of the bottom is 2:1-1: 2.
Furthermore, the total water absorption area of the plurality of water absorption openings (3) accounts for 0.1-1% of the gas-liquid separation area of the floating sludge layer.
Further, the ground suction distance of the water pump is 1-3 m.
Furthermore, the height from the uppermost end of a connecting pipeline (3-1) connecting the plurality of water suction ports (3) with the air receiving pipe (2) to the bottom of the floating sludge layer is 20-50 cm.
Further, the upper float sludge layer accumulation thickness threshold is related to wastewater characteristics and operating conditions. .
The invention has the beneficial effects that:
1. the invention utilizes the water pump to recover the floating sludge to circulate to the reactor, thereby improving the retention time of the floating sludge in the reactor and greatly improving the nitrogen removal efficiency of the floating sludge.
2. The invention utilizes the water pump to recover the floating sludge to circulate to the reactor, thereby improving the retention time of the floating sludge in the reactor, greatly increasing the interception rate of the floating sludge and ensuring the rapid accumulation of the sludge concentration in the reactor or keeping the high sludge concentration.
3. The main equipment of the device for reducing the floating sludge of the upflow anaerobic sludge reactor is only one water pump, and the operation control is simple and convenient.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view of the overall structure of an upflow anaerobic sludge reactor provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the upflow anaerobic sludge reactor provided in this embodiment is characterized in that the reactor further includes an empty receiving pipe 2 penetrating through the floating sludge layer, a plurality of water inlets 3 located at the lower part of the floating sludge layer, a water pump 4, and a reactor water inlet end 5, wherein a terminal connecting pipeline 3-1 of the plurality of water inlets 3 is communicated with the water pump 4 after being converged with the terminal of the empty receiving pipe 2, and the water pump is communicated with the reactor water inlet end 5; the ground suction lift of the water pump is 1-3 m.
The height of the observation window is 50-100cm, and the floating sludge layer can be clearly seen; the water inlets 3 are arranged 2-50cm below the gas-liquid interface, and the number of the water inlets is determined according to the gas-liquid separation area. The plurality of water inlets 3 are all in the shape of an inverted cone funnel; the diameter of the section where the bottom edge of each water suction port 3 is positioned is 10-200mm, the ratio of the diameter of the section of the bottom to the height of the section of the bottom is 2:1-1:2, and the total water suction area of the water suction ports accounts for 0.1-1% of the gas-liquid separation area of the floating sludge layer.
The uppermost end of a connecting pipeline 3-1 connecting a plurality of water suction ports 3 with the air receiving pipe 2 is 20-50cm away from the bottom of the floating sludge layer.
The height of the observation window, the setting height of the water inlets, the diameter of the water inlet interface, the ratio of the diameter to the height of the water inlets, the proportion of the total water absorption area to the gas-liquid separation area of the floating sludge layer, and the height of the uppermost end of the connecting pipeline 3-1, which is connected with the water receiving pipe 2, of the water inlets 3 from the bottom of the floating sludge layer can be selected in the respective range according to the requirements in practical use.
The reactor used in this example is an upflow anaerobic reactor with a diameter of 400mm and a height of the main reaction section of 2.5 m. The nitrogen volume loading of this example during operation was 1.0kg N/m3d, the inlet water is pretreated high-concentration actual wastewater, and the thickness of the sludge floating in the gas-liquid interface is not 5cm before the method is used.
Example 2
On the basis of example 1, in this example, a water suction port is arranged 3cm below an upper gas-liquid interface, the diameter of the water suction port is 10cm, the height of the water suction port is 20cm, the number of the water suction ports is uniformly 6, the number of the air receiving pipe ports is 30cm higher than the gas-liquid interface, and the suction distance of a water pump is 1.2 m. After the recovery method of the floating sludge is started, the thickness of the sludge at the gas-liquid interface is reduced to about 2cm, the volume load of nitrogen is slightly improved to 1.05-1.2kg N/m3 d。
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. The utility model provides a reduce device of STREAMING anaerobic ammonium oxidation reactor come-up mud, the device sets up in come-up mud layer department, and come-up mud layer is located the gas-liquid interface department of high ammonia nitrogen waste water, the device is including observing observation window (1) on come-up mud layer, its characterized in that, the reactor still including run through in the STREAMING anaerobic ammonium oxidation reactor gas-liquid interface connect empty pipe (2), be located a plurality of water sucking mouth (3), water pump (4), reactor intake end (5) of come-up mud layer lower part, the end of a plurality of water sucking mouth (3) through connecting tube (3-1) with connect after empty pipe (2) the end collects in the lump with water pump (4) intercommunication, the water pump with reactor intake end (5) intercommunication.
2. The apparatus for reducing floating sludge in an upflow anaerobic ammonia oxidation reactor as claimed in claim 1, wherein the height of the observation window is 50-100 cm.
3. The device for reducing the floating sludge in the upflow anaerobic ammonia oxidation reactor according to claim 1, wherein the plurality of water suction ports (3) are arranged 2-50cm below the gas-liquid interface, and the distance between the water suction ports and the gas-liquid interface can be adjusted.
4. The device for reducing the floating sludge in the upflow anaerobic ammonia oxidation reactor according to claim 1, wherein the plurality of water suction ports (3) are in the shape of an inverted cone funnel; the section diameter of the conical bottom edge of each water suction port (3) is 10-200mm, and the ratio of the section diameter of the bottom to the height is 2:1-1: 2.
5. The device for reducing the floating sludge of the upflow anaerobic ammonia oxidation reactor according to claim 1, wherein the total water absorption area of the plurality of water absorption ports (3) accounts for 0.1-1% of the gas-liquid separation area of the floating sludge layer.
6. The apparatus for reducing floating sludge in an upflow anaerobic ammonia oxidation reactor as claimed in claim 1, wherein the suction head of the water pump is 1-3 m.
7. The device for reducing the floating sludge in the upflow anaerobic ammonia oxidation reactor according to claim 1, wherein the height from the uppermost end of a connecting pipeline (3-1) connecting the plurality of water suction ports (3) and the air receiving pipe (2) to the bottom of the floating sludge layer is 20-50 cm.
8. The apparatus for reducing uplift sludge in an upflow anaerobic ammonia oxidation reactor as in claim 1, wherein the threshold of the uplift sludge layer accumulation thickness is related to wastewater characteristics and operating conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111097906.6A CN113697941A (en) | 2021-09-18 | 2021-09-18 | Device for reducing floating sludge of up-flow anaerobic ammonia oxidation reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111097906.6A CN113697941A (en) | 2021-09-18 | 2021-09-18 | Device for reducing floating sludge of up-flow anaerobic ammonia oxidation reactor |
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| Publication Number | Publication Date |
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| CN113697941A true CN113697941A (en) | 2021-11-26 |
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| CN202111097906.6A Pending CN113697941A (en) | 2021-09-18 | 2021-09-18 | Device for reducing floating sludge of up-flow anaerobic ammonia oxidation reactor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979670A (en) * | 2013-02-07 | 2014-08-13 | 李进民 | Tower type wastewater bio-treatment device |
| CN104628131A (en) * | 2015-02-15 | 2015-05-20 | 北京工业大学 | Production device and method for achieving stable denitrification of nitrite in continuous flow |
| CN204485674U (en) * | 2015-01-28 | 2015-07-22 | 韦孟威 | A kind of jet mixing device and the open type anaerobic reactor with this agitating device |
| CN105314733A (en) * | 2015-11-25 | 2016-02-10 | 中南大学 | Anaerobic ammonia oxidation reactor capable of relieving floating of granule sludge |
| CN207031071U (en) * | 2017-03-02 | 2018-02-23 | 北京万侯环境技术开发有限公司 | A kind of small-sized mud scum cancellation element |
| CN108328726A (en) * | 2018-01-24 | 2018-07-27 | 同济大学 | A kind of circulating EGSB reaction units and the sewage water treatment method based on the device |
-
2021
- 2021-09-18 CN CN202111097906.6A patent/CN113697941A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979670A (en) * | 2013-02-07 | 2014-08-13 | 李进民 | Tower type wastewater bio-treatment device |
| CN204485674U (en) * | 2015-01-28 | 2015-07-22 | 韦孟威 | A kind of jet mixing device and the open type anaerobic reactor with this agitating device |
| CN104628131A (en) * | 2015-02-15 | 2015-05-20 | 北京工业大学 | Production device and method for achieving stable denitrification of nitrite in continuous flow |
| CN105314733A (en) * | 2015-11-25 | 2016-02-10 | 中南大学 | Anaerobic ammonia oxidation reactor capable of relieving floating of granule sludge |
| CN207031071U (en) * | 2017-03-02 | 2018-02-23 | 北京万侯环境技术开发有限公司 | A kind of small-sized mud scum cancellation element |
| CN108328726A (en) * | 2018-01-24 | 2018-07-27 | 同济大学 | A kind of circulating EGSB reaction units and the sewage water treatment method based on the device |
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Application publication date: 20211126 |