CN115180720A - Integrated anaerobic ammonia oxidation granular sludge self-gas release device and method - Google Patents
Integrated anaerobic ammonia oxidation granular sludge self-gas release device and method Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 121
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 50
- 230000003647 oxidation Effects 0.000 title claims abstract description 50
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 41
- 238000005842 biochemical reaction Methods 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007667 floating Methods 0.000 claims abstract description 21
- 238000010992 reflux Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000002351 wastewater Substances 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 8
- 230000001174 ascending effect Effects 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000004062 sedimentation Methods 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 238000005273 aeration Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 15
- 238000009792 diffusion process Methods 0.000 claims description 11
- 239000008187 granular material Substances 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 8
- 230000008602 contraction Effects 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- -1 aeration Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000006837 decompression Effects 0.000 abstract description 3
- 238000005191 phase separation Methods 0.000 abstract description 2
- 238000010943 off-gassing Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 4
- 159000000007 calcium salts Chemical class 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008055 phosphate buffer solution Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C02F3/30—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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses an integrated anaerobic ammonia oxidation granular sludge self-gas release device and a method, belonging to the technical field of wastewater treatment, wherein the self-gas release device comprises a hollow device main body, the inner cavity of the device main body is divided into three areas, and the three areas sequentially comprise a water-gas mixing area, a biochemical reaction area and a precipitation reflux area from bottom to top; the self-outgassing method mainly comprises the following steps: the wastewater enters from bottom to top, undergoes denitrification biochemical reaction, is subjected to three-phase separation of sludge, water and gas and is subjected to pressure reduction and backflow of floating sludge, and the treatment operation of the wastewater containing ammonia and nitrogen is completed through three steps. The invention has compact structure, convenient operation and convenient popularization and use; the self-refluxing air release of the floating granular sludge is completed by utilizing the Venturi pressure drop effect through the lifting action of ascending water flow and air flow, no external power is needed, and the cost is saved; by utilizing the decompression and air release principle, the damage to the granular sludge structure is avoided, and the structure and activity of the internal flora are maintained to be stable, so that the stability and sustainability of the wastewater treatment effect are ensured.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an integrated anaerobic ammonia oxidation granular sludge self-degassing device and method.
Background
Anaerobic ammonia oxidation is a recognized advanced technology for biological nitrogen removal of sewage with high efficiency and low carbon, and compared with the traditional nitrification-denitrification nitrogen removal process, the anaerobic ammonia oxidation can greatly save carbon sources and aeration energy consumption. The anammox bacteria convert ammonia nitrogen and nitrous acid into nitrogen gas so as to complete the sewage denitrification process, however, as the anammox bacteria grow slowly, the effective retention of functional bacteria becomes a difficult problem in the application of the anammox technology. The anammox bacteria are easy to agglomerate to form granular sludge, so that better mud-water separation is realized, however, nitrogen is easy to agglomerate in the anammox granular sludge to block internal pore channels, so that the density is reduced, and the granules float upwards, so that the granules are lost along with the effluent. The existing engineering measures are usually blocked by adopting a grating, but the fundamental problem of floating of particles cannot be solved; the adoption is salvaged with the machinery breakage by manual work, wastes time and energy, and destroys granule self structure easily, influences functional microorganism activity.
The invention patent of China, patent No. 201510831107.5, is named as a method for relieving the floating of anaerobic ammonia oxidation granular sludge, and is characterized in that the anaerobic ammonia oxidation sludge is washed by phosphate buffer solution, then the sludge is placed in mixed liquor containing bicarbonate (or carbonate), phosphate (or hydrogen phosphate) and soluble calcium salt, low-speed stirring is carried out to ensure that calcium precipitates are attached to the granular sludge, then the granular sludge is put into an anaerobic ammonia oxidation reactor, the concentration of the bicarbonate (or carbonate) and the concentration of the phosphate (or hydrogen phosphate) in inlet water of the reactor are gradually increased, and meanwhile, the soluble calcium salt solution is fed from the top of a reaction area. Through the long-term operation process of the reactor, calcium salt precipitates produced by reaction are attached to the surface of the anaerobic ammonia oxidation granular sludge so as to increase the density of the sludge floating on the top of the reaction area, improve the settling property of the anaerobic ammonia oxidation granular sludge, and relieve the sludge floating and running off along with the effluent, thereby improving the anaerobic ammonia oxidation biomass in the reactor and finally improving the anaerobic ammonia oxidation performance of the reactor. However, in the treatment process, calcium salt is added to precipitate and attach to the surface of particles, so that the density of the granular sludge is improved, sedimentation is facilitated, and the treatment cost is increased to a certain extent.
The invention discloses a Chinese invention patent with the patent number of 201711353591.0, which is a method for controlling the floating of anaerobic ammonia oxidation granular sludge in a high-load reactor and belongs to the field of wastewater treatment. In the first 0-20 d of high load operation state, namely in the early stage, externally adding a mixed solution of two AHLs signal molecules with certain concentration into inlet water of a reactor every day, and then adding no AHLs signal molecules; the method can simultaneously control the floating loss of the granular sludge in the high-load anaerobic ammonia oxidation reactor and improve the activity of the granular sludge, so that the high-load anaerobic ammonia oxidation reactor keeps stable and higher denitrification efficiency. The invention aims to realize the control of sludge floating and the improvement of activity by adding AHLs signal molecules.
Therefore, how to develop an integrated anaerobic ammonium oxidation granular sludge self-degassing device, which does not add any chemical substance during the treatment process, and alleviates the floating of the granular sludge based on the self-power generated in the reaction process through the new design of the internal components of the reaction device becomes a technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide an integrated anaerobic ammonia oxidation granular sludge self-releasing device, which is characterized in that a three-phase separation inner component is innovatively designed, the backflow and the gas release of floating granular sludge are realized by utilizing a Venturi pressure drop effect, and the floating granular sludge is finally returned to a granular sludge bed layer so as to solve the problem that the anaerobic ammonia oxidation granular sludge is easy to float upwards and run off.
In order to solve the technical problem, the invention adopts the following technical scheme:
the invention discloses an integrated anaerobic ammonia oxidation granular sludge self-releasing device which comprises a hollow device main body, wherein an inner cavity of the device main body is divided into three areas, and the device main body sequentially comprises a water-gas mixing area, a biochemical reaction area and a precipitation backflow area from bottom to top.
Furthermore, the water-gas mixing area is communicated with the biochemical reaction area and has the same diameter, the sedimentation backflow area is positioned at the top and is communicated with the biochemical reaction area through a conical section, and the diameter of the sedimentation backflow area is larger than that of the biochemical reaction area; the height-diameter ratio of the biochemical reaction area is 6-10.
Further, the water-gas mixing area positioned at the bottom comprises a main sludge discharge pipe and a water inlet pipe, the main sludge discharge pipe is connected to the bottom surface of the device main body, a sludge discharge valve is mounted on the main sludge discharge pipe, the water inlet pipe is connected to the bottom of the side wall of the device main body, the water inlet end of the water inlet pipe penetrates through the side wall of the device main body and then is communicated with an ammonia-nitrogen-containing wastewater storage device, and an aeration device is arranged on the bottom surface of an inner cavity of the device main body; the aeration device comprises an air distribution pipe and a plurality of aeration heads, the aeration heads are connected to the air distribution pipe, and the air inlet end of the air distribution pipe penetrates through the side wall of the device main body and then is communicated with the air supply device.
Further, biochemical reaction district II includes reaction chamber, anaerobic ammonia oxidation granule sludge bed and sample connection, the middle inner chamber of device main part is the reaction chamber, the main part central authorities of reaction chamber are filled with anaerobic ammonia oxidation granule sludge bed, and the sample connection is installed to the lateral wall of device main part, the both ends of reaction chamber communicate with aqueous vapor mixing zone and sediment backward flow district respectively.
Furthermore, the sedimentation reflux area comprises a side sludge discharge pipe, a sedimentation chamber and a reflux pipe, the inner cavity at the top of the device main body is the sedimentation chamber, the side sludge discharge pipe is arranged on the side wall at the bottom of the sedimentation chamber, the reflux pipe is arranged on the side wall in the middle of the sedimentation chamber, and a reducing gas release pipe is arranged in the center of the sedimentation chamber; the upper part of the reducing air release pipe is communicated with the air chamber, an exhaust pipe and an exhaust pipe are installed at the top of the air chamber, a sludge suction pipe is connected to the middle part of the reducing air release pipe and is positioned below the liquid level of the settling chamber, an overflow weir is arranged at the upper part of the side wall of the settling chamber, and a drain pipe is arranged on the side wall of the device main body corresponding to the overflow weir; and the exhaust pipe are respectively provided with an exhaust valve and an exhaust valve.
Furthermore, reducing gassing pipe designs to leak hopper-shaped, from the bottom up includes oblique side shield, entry section, shrinkage section, throat section and diffuser segment in proper order, the diffuser segment with the air chamber intercommunication, the suction pipe is connected in on the throat section, oblique side shield is the loudspeaker form and arranges, just the entry section is arranged face-to-face with the reaction chamber of below.
Furthermore, the diameter ratio of the inlet section to the throat section of the reducing gas release pipe is 3-5.
Furthermore, the inclination angle alpha of the inclined side baffle is 120-130 degrees, the included angle beta of the contraction section is 15-20 degrees, and the included angle gamma of the diffusion section is 10-15 degrees.
An integrated anaerobic ammonia oxidation granular sludge self-releasing method for wastewater treatment by using the integrated anaerobic ammonia oxidation granular sludge self-releasing device specifically comprises the following steps:
step one, wastewater enters from bottom to top: the wastewater containing ammonia and nitrogen enters a water-gas mixing area from a water inlet pipe, and water and gas are mixed and rise under the aeration action of an aeration device;
step two, denitrification biochemical reaction: the wastewater containing ammonia nitrogen rises to a biochemical reaction zone through aeration and enters an anaerobic ammonia oxidation granular sludge bed filled in the center of a reaction chamber to carry out shortcut nitrification and anaerobic ammonia oxidation biochemical reaction, thereby completing the biological denitrification operation of the wastewater;
step three, precipitation and reflux: nitrogen, aeration, water flow and granular sludge generated by biochemical reaction enter a sedimentation reflux area III at the top together, wherein the water flow enters a sedimentation chamber, and overflows and is discharged through an overflow weir and a drain pipe after solid-liquid separation through gravity sedimentation; after part of granular sludge collides with the inclined side baffle plate, the granular sludge returns to the reaction chamber through gravity settling, and part of the granular sludge floats to the liquid level of the settling chamber; the ascending air flow is collected by the reducing air release pipe, converged and enters the throat section, the generated negative pressure sucks the granular sludge floating above the liquid level into the throat section through the sludge suction pipe, then the granular sludge enters the diffusion section along with the air flow, the air is discharged through the exhaust pipe, and the granular sludge subjected to pressure reduction and air release in the throat section is settled by gravity and returns to the reaction chamber to participate in biochemical reaction again.
Furthermore, when the device is started in the initial stage and the activity of the granular sludge is unstable, the vacuum pump communicated with the exhaust pipe works to assist in strengthening the backflow and air release of the floating granular sludge.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention has compact structure, convenient operation and convenient popularization and use; the self-refluxing air release of the floating granular sludge is finished by utilizing the Venturi pressure drop effect through the lifting action of ascending water flow and air flow, no external power is needed, and the cost is saved; by utilizing the decompression and air release principle, the damage to the granular sludge structure is avoided, and the structure and activity of the internal flora are maintained to be stable, so that the stability and sustainability of the wastewater treatment effect are ensured, and the collapse of a reaction system caused by biomass loss is avoided.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic view of an integrated anaerobic ammonium oxidation granular sludge self-degassing device according to the present invention;
description of the reference numerals: i, a water-gas mixing zone; II, a biochemical reaction area; III, a precipitation reflux zone;
1. a main sludge discharge pipe; 2. a mud valve; 3. an air distribution pipe; 4. an aeration head; 5. a water inlet pipe; 6. a reaction chamber; 7. an anammox granular sludge bed; 8. a sampling port; 9. a side sludge discharge pipe; 10. a settling chamber; 11. a return pipe; 12. a reducing air release pipe; 13. an exhaust pipe; 14. an exhaust valve; 15. an air exhaust pipe; 16. an air extraction valve; 17. an air chamber; 18. a mud suction pipe; 19. an overflow weir; 20. a drain pipe;
12-1 inclined side baffle plates; 12-2, an inlet section; 12-3, a contraction section; 12-4, a throat section; 12-5 and a diffusion section.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in figure 1, the integrated anaerobic ammonia oxidation granular sludge self-releasing device comprises a hollow device main body, wherein the inner cavity of the device main body is divided into three areas, and the device main body sequentially comprises a water-gas mixing area I, a biochemical reaction area II and a precipitation backflow area III from bottom to top.
Specifically, the water-gas mixing area I is communicated with the biochemical reaction area II and has the same diameter, the sedimentation backflow area III is positioned at the top and is communicated with the biochemical reaction area II through a conical section, and the diameter of the sedimentation backflow area III is larger than that of the biochemical reaction area II; the height-diameter ratio of the biochemical reaction area II is 6-10.
The water-gas mixing area I positioned at the bottom comprises a main sludge discharge pipe 1 and a water inlet pipe 5, the main sludge discharge pipe 1 is connected to the bottom surface of the device main body, a sludge discharge valve 2 is mounted on the main sludge discharge pipe 1, and the regular sludge discharge operation can be realized by controlling the opening and closing of the sludge discharge valve 2; the water inlet pipe 5 is connected to the bottom of the side wall of the device main body, the water inlet end of the water inlet pipe 5 penetrates through the side wall of the device main body and then is communicated with an ammonia nitrogen-containing wastewater storage device, and an aeration device is arranged on the bottom surface of the inner cavity of the device main body; the aeration device comprises an air distribution pipe 3 and aeration heads 4, the aeration heads 4 are uniformly distributed and connected to the air distribution pipe 3, the aeration direction is vertical and upward, and the air inlet end of the air distribution pipe 3 penetrates through the side wall of the device main body and then is communicated with an air supply device; when the device works, the wastewater containing ammonia and nitrogen flows in from the water inlet pipe 5 and is mixed into the biochemical reaction area II at the upper part under the driving of ascending air flow generated by the aeration head 4.
The biochemical reaction zone II comprises a reaction chamber 6, an anaerobic ammonia oxidation granular sludge bed 7 and a sampling port 8, the middle inner cavity of the device main body is the reaction chamber 6, the main body center of the reaction chamber 6 is filled with the anaerobic ammonia oxidation granular sludge bed 7, the sampling port 8 is installed on the side wall of the device main body, and two ends of the reaction chamber 6 are respectively communicated with the water-gas mixing zone I and the sedimentation reflux zone III. When the anaerobic ammonium oxidation granular sludge settling device works, ammonia nitrogen-containing wastewater in the water-gas mixing zone I is mixed with air and enters the anaerobic ammonium oxidation granular sludge bed 7 to carry out denitrification reaction, and water flow, gas and granular sludge after the reaction enter the settling reflux zone III together.
The sedimentation reflux area III comprises a side sludge discharge pipe 9, a sedimentation chamber 10 and a reflux pipe 11, the top inner cavity of the device main body is the sedimentation chamber 10, the side sludge discharge pipe 9 is installed on the side wall of the bottom of the sedimentation chamber 10, the reflux pipe 11 is installed on the side wall of the middle of the sedimentation chamber 10, and a reducing gas release pipe 12 is installed in the center of the sedimentation chamber 10; the upper part of the reducing air release pipe 12 is communicated with an air chamber 17, an exhaust pipe 13 and an exhaust pipe 15 are installed at the top of the air chamber 17, a sludge suction pipe 18 is connected to the middle part of the reducing air release pipe 12, the sludge suction pipe 18 is positioned below the liquid level of the settling chamber 10, an overflow weir 19 is arranged at the upper part of the side wall of the settling chamber 10, a drain pipe 20 is arranged on the side wall of the device main body corresponding to the overflow weir 19, and the treated wastewater flows out through the overflow weir 19 and is discharged through the drain pipe 20; specifically, the exhaust pipe 13 and the exhaust pipe 15 are respectively provided with an exhaust valve 14 and an exhaust valve 16, and the opening and closing of the pipeline are controlled by the exhaust valve 14 and the exhaust valve 16.
The reducing gas release pipe 12 is designed to be funnel-shaped and sequentially comprises an inclined side baffle 12-1, an inlet section 12-2, a contraction section 12-3, a throat section 12-4 and a diffusion section 12-5 from bottom to top, the diffusion section 12-5 is communicated with the gas chamber 17, the sludge suction pipe 18 is connected to the throat section 12-4, the inclined side baffle 12-1 is arranged in a horn shape, and the inlet section 12-2 and the reaction chamber 6 below are arranged face to face. Specifically, the reducing gas release pipe 12 is a venturi structure, when gas or liquid flows in the reducing gas release pipe 12 (venturi), at the narrowest part of the pipeline, the dynamic pressure (velocity head) reaches the maximum value, the static pressure (resting pressure) reaches the minimum value, and the velocity of the gas (liquid) rises due to the reduction of the cross-sectional area of the through-flow. The whole inrush current is subjected to the pipeline shrinking process in the same time, so that the pressure is reduced in the same time, and a pressure difference is generated, and the pressure difference is used for measuring or providing an external suction force for the fluid, so that the suction and sedimentation operation of the granular sludge floating above the liquid surface is realized.
Specifically, the diameter ratio of the inlet section 12-2 to the throat section 12-4 of the reducing air release pipe 12 is 3-5. The inclination angle alpha of the inclined side baffle 12-1 is 120-130 degrees, the included angle beta of the contraction section 12-3 is 15-20 degrees, and the included angle gamma of the diffusion section 12-5 is 10-15 degrees.
An integrated anaerobic ammonia oxidation granular sludge self-releasing method for wastewater treatment by using the integrated anaerobic ammonia oxidation granular sludge self-releasing device specifically comprises the following steps:
step one, wastewater enters from bottom to top: the wastewater containing ammonia and nitrogen enters a water-gas mixing area I from a water inlet pipe 5 at the bottom, and the water and the gas are mixed and rise under the aeration action of an aeration device;
step two, denitrification biochemical reaction: the wastewater (300-1000 mg-N/L) containing ammonia nitrogen rises to a biochemical reaction area II through aeration, and enters an anaerobic ammonia oxidation granular sludge bed 7 filled in the center of a reaction chamber 6 to generate short-cut nitrification and anaerobic ammonia oxidation biochemical reactions, so that biological nitrogen removal operation of sewage is completed; specifically, the sludge concentration is 5-10 g/L, and the filling ratio is 30-50%;
step three, precipitation and reflux: nitrogen, aeration, water flow and granular sludge generated by biochemical reaction enter a sedimentation reflux area III at the top together, wherein the water flow enters a sedimentation chamber 10, and overflows and is discharged through an overflow weir 19 and a drain pipe 20 after solid-liquid separation through gravity sedimentation; part of the granular sludge collides with the inclined side baffle 12-1 and then returns to the reaction chamber 6 through gravity settling, and part of the granular sludge floats to the liquid level of the settling chamber 10; the ascending air flow is collected by the reducing air release pipe 12, converged and enters the throat section 12-4, the generated negative pressure sucks the granular sludge floating above the liquid level into the throat section 12-4 through the sludge suction pipe 18, then enters the diffusion section 12-5 along with the air flow, the air is discharged through the exhaust pipe 13, and the granular sludge after the pressure reduction and air release of the throat section 12-4 is settled by gravity and returns to the reaction chamber 6 to participate in the biochemical reaction again. Wherein the ascending flow velocity of the inlet section 12-2 of the reducing air release pipe 12 is 0.5-2.0 m/s.
In addition, the vacuum pump communicated with the exhaust pipe 15 is operated to assist and strengthen the backflow and air release of the floating granular sludge at the initial startup stage of the device and when the activity of the granular sludge is unstable.
Except that automated control realizes the backward flow gassing, still can carry out artifical participation and strengthen, when the suction pipe blocks up or mud activity reduces, can salvage the collection upper floating anaerobic ammonia oxidation granule mud through the manual work, adopt the vacuum pump again to realize dystopy decompression gassing, put back in the inner chamber of device body.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. The utility model provides an integral type anaerobic ammonium oxidation granule mud is from releasing gas device which characterized in that: the device comprises a hollow device main body, wherein an inner cavity of the device main body is divided into three areas, and the three areas sequentially comprise a water-gas mixing area (I), a biochemical reaction area (II) and a precipitation backflow area (III) from bottom to top.
2. The integrated anaerobic ammonia oxidation granular sludge self-releasing device according to claim 1, which is characterized in that: the water-gas mixing area (I) is communicated with the biochemical reaction area (II) and has the same diameter, the sedimentation backflow area (III) is positioned at the top and is communicated with the biochemical reaction area (II) through a conical section, and the diameter of the sedimentation backflow area (III) is larger than that of the biochemical reaction area (II); the height-diameter ratio of the biochemical reaction area (II) is 6-10.
3. The integrated anaerobic ammonia oxidation granular sludge self-releasing device according to claim 2, which is characterized in that: the water-gas mixing area (I) positioned at the bottom comprises a main sludge discharge pipe (1) and a water inlet pipe (5), the main sludge discharge pipe (1) is connected to the bottom surface of the device main body, a sludge discharge valve (2) is installed on the main sludge discharge pipe (1), the water inlet pipe (5) is connected to the bottom of the side wall of the device main body, the water inlet end of the water inlet pipe (5) penetrates through the side wall of the device main body and then is communicated with an ammonia-nitrogen-containing wastewater storage device, and an aeration device is arranged on the bottom surface of an inner cavity of the device main body; the aeration device comprises a gas distribution pipe (3) and aeration heads (4), the aeration heads (4) are connected to the gas distribution pipe (3), and the gas inlet end of the gas distribution pipe (3) penetrates through the side wall of the device main body and then is communicated with a gas supply device.
4. The integrated anaerobic ammonia oxidation granular sludge self-releasing device according to claim 2, which is characterized in that: biochemical reaction district (II) is including reaction chamber (6), anammox granule sludge bed (7) and sample connection (8), the middle inner chamber of device main part is reaction chamber (6), the main part central authorities of reaction chamber (6) are filled with anammox granule sludge bed (7), and sample connection (8) are installed to the lateral wall of device main part, the both ends of reaction chamber (6) communicate with aqueous vapor mixing zone (I) and sediment backward flow district (III) respectively.
5. The integrated anaerobic ammonia oxidation granular sludge self-releasing device according to claim 2, which is characterized in that: the sedimentation reflux area (III) comprises a side sludge discharge pipe (9), a sedimentation chamber (10) and a reflux pipe (11), the inner cavity of the top of the device main body is the sedimentation chamber (10), the side sludge discharge pipe (9) is installed on the side wall of the bottom of the sedimentation chamber (10), the reflux pipe (11) is installed on the side wall of the middle of the sedimentation chamber (10), and a reducing air release pipe (12) is installed in the center of the sedimentation chamber (10); the upper part of the reducing air release pipe (12) is communicated with an air chamber (17), an exhaust pipe (13) and an exhaust pipe (15) are installed at the top of the air chamber (17), a sludge suction pipe (18) is connected to the middle part of the reducing air release pipe (12), the sludge suction pipe (18) is located below the liquid level of the settling chamber (10), an overflow weir (19) is arranged on the upper part of the side wall of the settling chamber (10), and a drain pipe (20) is arranged on the side wall of the device main body corresponding to the overflow weir (19); and the exhaust pipe (13) and the exhaust pipe (15) are respectively provided with an exhaust valve (14) and an exhaust valve (16).
6. The integrated anaerobic ammonia oxidation granular sludge self-releasing device according to claim 5, which is characterized in that: the variable-diameter gas release pipe (12) is designed to be funnel-shaped and sequentially comprises an inclined side baffle (12-1), an inlet section (12-2), a contraction section (12-3), a throat section (12-4) and a diffusion section (12-5) from bottom to top, the diffusion section (12-5) is communicated with the gas chamber (17), the sludge suction pipe (18) is connected to the throat section (12-4), the inclined side baffle (12-1) is arranged in a horn shape, and the inlet section (12-2) and the reaction chamber (6) below are arranged face to face.
7. The integrated anaerobic ammonia oxidation granular sludge self-releasing device according to claim 6, which is characterized in that: the diameter ratio of the inlet section (12-2) to the throat section (12-4) of the reducing air release pipe (12) is 3-5.
8. The integrated anaerobic ammonia oxidation granular sludge self-releasing device according to claim 6, which is characterized in that: the inclination angle alpha of the inclined side baffle (12-1) is 120-130 degrees, the included angle beta of the contraction section (12-3) is 15-20 degrees, and the included angle gamma of the diffusion section (12-5) is 10-15 degrees.
9. An integrated anaerobic ammonia oxidation granular sludge self-releasing method is characterized in that: the integrated anaerobic ammonia oxidation granular sludge self-degassing device of any one of claims 1 to 8 is used for wastewater treatment, and comprises the following steps:
step one, wastewater enters from bottom to top: the wastewater containing ammonia and nitrogen enters a water-gas mixing area (I) from a water inlet pipe (5), and water and gas are mixed and rise under the action of aeration of an aeration device;
step two, denitrification biochemical reaction: the wastewater containing ammonia nitrogen rises to a biochemical reaction zone (II) through aeration and enters an anaerobic ammonia oxidation granular sludge bed (7) filled in the center of a reaction chamber (6) to carry out short-cut nitrification and anaerobic ammonia oxidation biochemical reaction, thereby completing biological denitrification operation of sewage;
step three, precipitation and reflux: nitrogen, aeration, water flow and granular sludge generated by biochemical reaction enter a sedimentation reflux area (III) at the top together, wherein the water flow enters a sedimentation chamber (10), and after solid-liquid separation through gravity sedimentation, overflow is discharged through an overflow weir (19) and a drain pipe (20); part of the granular sludge collides with the inclined side baffle (12-1) and then returns to the reaction chamber (6) through gravity settling, and part of the granular sludge floats to the liquid level of the settling chamber (10); the ascending air flow is collected by the reducing air release pipe (12) and converged into the throat section (12-4), the generated negative pressure sucks the granular sludge floating above the liquid level back into the throat section (12-4) through the sludge suction pipe (18), then the granular sludge enters the diffusion section (12-5) along with the air flow, the air is discharged through the exhaust pipe (13), and the granular sludge after being decompressed and released by the throat section (12-4) is settled by gravity and returns to the reaction chamber (6) to participate in biochemical reaction again.
10. The integrated anaerobic ammonia oxidation granular sludge self-releasing method according to claim 9, characterized in that: at the initial stage of starting the device and when the activity of the granular sludge is unstable, the vacuum pump communicated with the air exhaust pipe (15) works to assist in strengthening the backflow air release of the floating granular sludge.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117509898A (en) * | 2023-12-05 | 2024-02-06 | 瑞盛环境股份有限公司 | Solid phase opposite nitrification-anaerobic ammonia oxidation low-carbon domestic sewage treatment device and process |
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| CN107915316A (en) * | 2017-10-20 | 2018-04-17 | 浙江大学 | The Anammox advanced nitrogen reactor and method of granule sludge and biologic packing material cooperative reinforcing |
| CN110078300A (en) * | 2019-04-20 | 2019-08-02 | 浙江大学 | Wheat bed Anammox denitrification reactor and its method |
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| CN105152324A (en) * | 2015-09-22 | 2015-12-16 | 浙江大学 | Anaerobic ammonia oxidation reactor capable of classifying sludge through cyclone |
| CN106745746A (en) * | 2017-01-16 | 2017-05-31 | 哈尔滨工业大学 | The leading integral anaerobic ammoxidation denitrification reactor of granule sludge and method |
| CN107915316A (en) * | 2017-10-20 | 2018-04-17 | 浙江大学 | The Anammox advanced nitrogen reactor and method of granule sludge and biologic packing material cooperative reinforcing |
| CN110078300A (en) * | 2019-04-20 | 2019-08-02 | 浙江大学 | Wheat bed Anammox denitrification reactor and its method |
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