CN113697959A - Internal circulation autotrophic nitrogen removal device for strengthening sludge retention performance - Google Patents
Internal circulation autotrophic nitrogen removal device for strengthening sludge retention performance Download PDFInfo
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- CN113697959A CN113697959A CN202111054667.6A CN202111054667A CN113697959A CN 113697959 A CN113697959 A CN 113697959A CN 202111054667 A CN202111054667 A CN 202111054667A CN 113697959 A CN113697959 A CN 113697959A
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- 239000010802 sludge Substances 0.000 title claims abstract description 92
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 43
- 230000001651 autotrophic effect Effects 0.000 title claims abstract description 34
- 230000014759 maintenance of location Effects 0.000 title claims abstract description 26
- 238000005728 strengthening Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 176
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 96
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 49
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 48
- 230000003647 oxidation Effects 0.000 claims abstract description 48
- 238000005276 aerator Methods 0.000 claims abstract description 25
- 238000005273 aeration Methods 0.000 claims description 49
- 238000005192 partition Methods 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 20
- 230000002708 enhancing effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 abstract description 11
- 230000003179 granulation Effects 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 8
- 239000010865 sewage Substances 0.000 description 65
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 20
- 239000001301 oxygen Substances 0.000 description 20
- 229910052760 oxygen Inorganic materials 0.000 description 20
- 238000002156 mixing Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 12
- 241000894006 Bacteria Species 0.000 description 10
- 241001453382 Nitrosomonadales Species 0.000 description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 10
- 230000009471 action Effects 0.000 description 9
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 7
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 238000006396 nitration reaction Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000000149 chemical water pollutant Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
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- 239000002351 wastewater Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009935 nitrosation Effects 0.000 description 2
- 238000007034 nitrosation reaction Methods 0.000 description 2
- 238000011197 physicochemical method Methods 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 238000013316 zoning Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000003311 flocculating effect Effects 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 naerobic Species 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 239000012466 permeate 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
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
-
- 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
- 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
- C02F7/00—Aeration of stretches of water
-
- 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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an internal circulation autotrophic nitrogen removal device for strengthening sludge retention performance, wherein a reactor body comprises a short-cut nitrification chamber and an anaerobic ammonia oxidation chamber which are internally and externally sleeved, and the short-cut nitrification chamber and the anaerobic ammonia oxidation chamber are communicated through a first through hole and a second through hole; the top of the reactor body is provided with a detachable double-layer baffle plate with holes; the top of the short-cut nitrification chamber is provided with a water distributor, and the bottom of the water distributor is provided with an aerator; the water distributor is provided with a gas-water distribution component, the gas-water distribution component comprises a T-shaped water inlet pipe and a vent pipe, the water outlet of the T-shaped water inlet pipe is arranged in the double-layer baffle with holes, and the vent pipe is communicated with the water outlet of the T-shaped water inlet pipe; the top of the anaerobic ammonia oxidation chamber is provided with a sludge interception component arranged inside the double-layer baffle plate with holes; the top of the double-layer baffle plate with the holes is provided with an overflow weir, and the overflow weir is communicated with the water outlet pipe. The invention has the advantages of high sludge granulation degree, high sludge concentration in the reactor, high denitrification efficiency and stable operation of the reaction system.
Description
Technical Field
The invention belongs to the technical field of biological sewage treatment, and particularly relates to an internal circulation autotrophic nitrogen removal device for strengthening sludge retention performance.
Background
According to the denitrification principle, the sewage denitrification process is generally divided into a physicochemical method and a biological method. Among physicochemical methods, the selective ion exchange method has high removal rate of ammonia nitrogen, and cannot selectively adsorb and remove ammonia nitrogen, nitrite and organic nitrogen. Biological denitrification makes the prior art mature and one of the most widely applied treatment technologies. The main mechanism of biological denitrification is to utilize the ammonia nitrogen action of ammonifying bacteria, the nitrification of nitrite bacteria and nitrate bacteria and the denitrification of denitrifying bacteria to achieve the aim of denitrification. Conventional biological denitrification processes to spatially or temporally form the nitrification and denitrification processes into a separate environment, biological denitrification is typically accomplished in two or more separate reactors
The invention patent application with publication number CN 113233596A discloses a method for treating middle and late stage landfill leachate by a continuous flow shortcut nitrification/endogenous shortcut denitrification/anaerobic ammonia oxidation integrated process, wherein the middle and late stage landfill leachate enters an AOA (argon oxygen decarburization) continuous flow reactor to operate in an A/O/A mode, and total nitrogen is removed by a PN/A-ED/A combined process. Microorganisms in the anaerobic section absorb external carbon sources in the inlet water and store the external carbon sources as intracellular carbon sources, and the aerobic section performs short-range nitrification to partially oxidize ammonia nitrogen in the inlet water into nitrite nitrogen; the anoxic section firstly carries out anaerobic ammonia oxidation to generate partial nitrate nitrogen, the nitrate nitrogen is reduced into nitrite nitrogen through endogenous short-range denitrification, and the nitrite nitrogen is provided for anaerobic ammonia oxidation reaction. According to the application, 95.3 percent of total nitrogen in the landfill leachate at the middle and late stages is removed through the continuous flow reactor, and the method is suitable for deep denitrification treatment of high-ammonia nitrogen wastewater such as the landfill leachate.
The invention patent with the publication number of CN 103755026B discloses an integrated baffle plate internal circulation autotrophic nitrogen removal granular sludge reactor, which comprises a reactor body, wherein a sludge discharge unit, a backflow water distribution unit, an internal circulation reaction unit, a three-phase separation unit and a water outlet unit are arranged in an inner cavity of the reactor body from bottom to top, and the sludge discharge unit comprises a sludge discharge port which is arranged at the bottom end of the reactor body and is used for being communicated with the outside; the reflux water distribution unit comprises a reflux folded plate which is also used as a partial bottom plate of the reactor body and a uniform water distributor which is arranged on the reflux folded plate; the internal circulation reaction unit is sequentially divided into three compartments of an anaerobic reaction zone, a time buffer zone and a micro-aerobic reaction zone from left to right by a vertical baffle plate and a Z-shaped baffle plate; the water outlet unit comprises a water outlet of the water outlet groove, and the water outlet groove is communicated with the outside through the water outlet. The invention adopts the design of the Z-shaped baffle plate, has compact structure, excellent mass transfer and mixing performance, is beneficial to forming and maintaining granular sludge and has high denitrification efficiency.
Disclosure of Invention
The invention aims to provide an integrated internal circulation autotrophic nitrogen removal device with enhanced sludge retention performance, which has the advantages of high sludge granulation degree, high sludge concentration in a reactor, high nitrogen removal efficiency and stable reaction system operation.
The technical scheme adopted by the invention for realizing the purpose is as follows:
an internal circulation autotrophic nitrogen removal device for strengthening sludge retention performance comprises a reactor body, wherein the reactor body comprises a shortcut nitrification chamber and an anaerobic ammonia oxidation chamber which are internally and externally sleeved, and the shortcut nitrification chamber is communicated with the anaerobic ammonia oxidation chamber through a first through hole and a second through hole; the first through hole is arranged in the middle of the side wall of the shortcut nitrification chamber, and the second through hole is arranged at the bottom of the side wall of the shortcut nitrification chamber; the top of the reactor body is provided with a detachable double-layer perforated baffle;
the top of the short-cut nitrification chamber is provided with a water distributor, and the bottom of the short-cut nitrification chamber is provided with an aerator; the water distributor is provided with a gas-water distribution component, the gas-water distribution component comprises a T-shaped water inlet pipe and a vent pipe, the water outlet of the T-shaped water inlet pipe is arranged in the double-layer baffle with holes, and the vent pipe is communicated with the water outlet of the T-shaped water inlet pipe;
the top of the anaerobic ammonia oxidation chamber is provided with a sludge interception component which is arranged inside the double-layer baffle with holes; the top of the double-layer baffle plate with the holes is provided with an overflow weir, and the overflow weir is communicated with the water outlet pipe; the bottom of the water outlet pipe is flush with the top of the double-layer baffle with the holes.
Further, the reactor body is cylindrical, the short-cut nitrification chamber and the anaerobic ammonia oxidation chamber are concentrically arranged, and the short-cut nitrification chamber is sleeved inside the anaerobic ammonia oxidation chamber; the double-layer perforated baffle comprises an upper layer partition plate and a lower layer partition plate which are arranged in parallel, the upper layer partition plate and the lower layer partition plate are both provided with sieve holes, and a certain gap is reserved between the upper layer partition plate and the lower layer partition plate.
Sewage to be treated enters the shortcut nitrification chamber through sieve pores on the double-layer perforated baffle plate, and the shortcut nitrification chamber forms an oxygen-limiting area under the cooperation of the bottom aerator and the gas-water diversion assembly, so that a good living environment is provided for ammonia oxidizing bacteria. Ammonia nitrogen is oxidized into nitrite nitrogen and nitrate nitrogen by ammonia oxidizing bacteria under the aerobic condition. The air-water distribution component is provided with the vent pipe which is matched with the T-shaped water inlet pipe, so that the effective removal of sludge and air can be enhanced, the sufficient mixing of sludge and water in the sludge can be promoted, and the oxygenation effect of sludge fluid can be enhanced.
Sludge enters the anaerobic ammonia oxidation chamber through the second through hole after being digested in the shortcut nitrification chamber. The anaerobic ammonia oxidation chamber has low oxygen content, and nitrified products such as nitrite nitrogen, nitrate nitrogen and the like are reduced into nitrogen or gaseous oxides of nitrogen to be discharged by anaerobic ammonia oxidation bacteria and certain facultative bacteria, so that green denitrification of sludge is realized.
The sludge in the anaerobic ammonia oxidation chamber can enter the short-cut nitrification chamber again through the first through hole. In this way, ammonia nitrogen remaining in the sewage and sludge can be nitrified again by ammonia oxidizing bacteria to form nitrite nitrogen and nitrate nitrogen.
The top of the anaerobic ammonia oxidation chamber is provided with a sludge interception component which is easy to disassemble and clean, and the clearance between the double-layer perforated baffles is filled with interception filler for intercepting sludge. The retention capacity of the sludge in the reactor body influences the operation performance of the autotrophic nitrogen removal system, the sludge interception component is arranged, the sludge loss is prevented, the concentration of microorganisms inside the reactor body, especially functional microorganism ammonia oxidizing bacteria and anaerobic ammonia oxidizing bacteria, can be ensured, and the nitrogen removal performance is prevented from being deteriorated.
By adopting the technical scheme, oxygen limitation and anaerobic zoning are realized in the same reactor, nitrite bacteria and anaerobic ammonium oxidation bacteria can be cultured in a small space, the environment diversity of the system is improved, enrichment of functional flora is facilitated, and the autotrophic nitrogen removal capability of the system is improved. The two treatment units of the shortcut nitrification chamber and the anaerobic ammonia oxidation chamber are isolated from each other through the side wall of the shortcut nitrification chamber, so that the independence between the oxygen-limiting zone and the anaerobic zone is realized, the sludge circularly flows in the whole reactor through the first through hole and the second through hole, the granulation of flocculent sludge is facilitated, the retention capacity of the reactor is enhanced, and the high-efficiency treatment of ammonia nitrogen is realized. On the other hand, sewage to be treated in the short-cut nitrification chamber enters from top to bottom, airflow flows from bottom to top through the aerator, and water flow and airflow are arranged in different directions and matched with the internal circulation flow of muddy water, so that the high-efficiency and stable operation of the system is facilitated; the sewage and the sludge are fully contacted under the action of water and airflow and the internal circulation flow of the sewage and the sludge between the shortcut nitrification chamber and the anaerobic ammonia oxidation chamber, and the biological treatment of the wastewater is facilitated.
According to one embodiment of the invention, the first through hole is communicated with the anaerobic ammonia oxidation chamber through a straight connecting pipe; the second through hole is communicated with the anaerobic ammonia oxidation chamber through a U-shaped connecting pipe, one side of the U-shaped connecting pipe, which is positioned in the shortcut nitrification chamber, is provided with a water inlet tail end, one side of the U-shaped connecting pipe, which is positioned in the anaerobic ammonia oxidation chamber, is provided with a water outlet tail end, and the height of the water inlet tail end is higher than that of the water outlet tail end.
The bottom of the anaerobic ammonia oxidation chamber is communicated with the shortcut nitrification chamber through a U-shaped connecting pipe, and the U-shaped connecting pipe is arc-shaped, so that sludge can be prevented from being deposited in the channel. The water inlet end of the U-shaped connecting pipe is higher than the water outlet end, so that sewage in the anaerobic ammonia oxidation chamber can be prevented from flowing back to the shortcut nitrification chamber through the second through hole, and the smooth internal circulation of sludge and sewage is ensured. The existence of the U-shaped connecting pipe and the straight connecting pipe promotes the whole reactor body to form the internal circulation of sewage and sludge under the action of the water inlet impact force and the buoyancy force of gas escape, shortens the process flow of biological denitrification, reduces the discharge amount of residual sludge and carbon dioxide and reduces the operation cost.
Further, the straight connecting pipe connected with the first through hole may have a terminal connected with an extension pipe extending downward. The arrangement of the extension pipe can prevent the sewage in the straight connecting pipe from flowing backwards, and the continuity of the sludge and the sewage internal circulation is ensured. In addition, the sewage discharged by the extension pipe intensively impacts a certain area at the bottom of the shortcut nitrification chamber, so that sludge deposition can be avoided, the mixing of sewage and sludge is promoted, the granulation of the sludge is promoted, and the sludge retention performance is improved.
Furthermore, in order to prevent the sewage discharged by the extension pipe from entering the U-shaped connecting pipe, the tail end of the extension pipe, which is far away from the first through hole, is bent towards the direction far away from the side wall of the short-distance nitrification chamber, namely, the tail end is bent towards the center of the short-distance nitrification chamber. Thus, the mixing between the sewage discharged by the extension pipe and the gas discharged by the aerator can be promoted, the oxygen content is improved, and the nitrification of the ammonia oxidizing bacteria is promoted.
According to one embodiment of the invention, the T-shaped water inlet pipe comprises a vertically arranged water inlet pipe body and a horizontally arranged water outlet pipe body, water is discharged from two ends of the water outlet pipe body, the vent pipes correspond to water outlets of the water outlet pipe body one by one, and the vent pipes are arranged in parallel with the water inlet pipe body.
From this, T type inlet tube accessible sieve mesh alternates on double-deck utensil hole baffle, and the input of T type inlet tube links to each other with pending sewage, and the output is the delivery port of play water pipe body promptly. The water outlet is communicated with the vent pipe, the top of the vent pipe can be connected with the output end of the micro blower, and the input end of the micro blower is communicated with the outside air, so that air can be fed downwards through the vent pipe. The joint of the water outlet and the vent pipe is arranged at the top of the vent pipe and is positioned at the downstream of the micro blower.
The sewage to be treated enters the short-cut nitrification chamber through the T-shaped water inlet pipe, and when the sewage enters the water outlet pipe body from the water inlet pipe body, the water body shunts and flows to the water outlets at the two ends of the water outlet pipe body and is mixed with the airflow in the vent pipe at the water outlet. So, the mixing of double-fluid is favorable to improving the water and gaseous mixed effect to sieve mesh through double-deck utensil hole baffle bottom gets into the shortcut nitrification indoorly, and reaches the fluid of bottom, and its velocity of flow obtains improving, is favorable to increasing the velocity of flow of lower floor's fluid in the shortcut nitrification chamber, and then prevents that the indoor mud of shortcut nitrification from subsiding. On the other hand, the airflow in the vent pipe has a certain impact effect on sewage, can promote sludge in the water body to be mixed and granulated, and prevents flocculation. The water in the sewage and a large amount of gas are mixed in the gap space inside the double-layer perforated baffle, and a large amount of bubbles can be prevented or reduced in the water-gas mixing process of other areas from being broken, so that the microorganisms in the reactor body are prevented from being gathered in a certain range, and the bubble breakage in the fluid in the anaerobic ammonia oxidation chamber can be avoided to influence the survival quality of bacteria in an anaerobic area. The mixing of a large amount of air currents and water in the inside clearance space of double-deck utensil hole baffle easily forms certain noise, produces certain vibrations and can avoid this internal thallus of reactor to gather in upper space, prevents that the thallus from flowing out and the fungus class quantity that leads to reduces from the outlet pipe.
According to one embodiment of the invention, the end of the water outlet pipe body is communicated with the top of the vent pipe, and the side wall of the vent pipe is provided with the water filtering holes.
Thus, the sewage discharged from the water outlet pipe body is mixed with the airflow in the vent pipe, and the flow direction is changed. Under the impact of air current, water body, mud, gaseous mixing again in the sewage, sewage permeates the drainage pore and oozes in the clearance of double-deck utensil hole baffle, can further improve the mixed degree of sewage through cutting apart of drainage pore, improves the content of dissolved oxygen in the sewage to can promote the miniaturation of mud, prevent in mud caking or the direct clearance that gets into double-deck utensil hole baffle of wadding group, avoid the sieve mesh to block up, guarantee that sewage is leading-in smooth and easy.
According to an embodiment of the present invention, the output end of the aerator is provided with an aerator pipe, the aerator pipe is arranged inside the aerator housing, and the aerator housing is provided with a first air outlet.
The aerator is adopted to improve the content of dissolved oxygen for the sewage in the short-cut nitrification chamber, ensure the growth of good-culture flora and promote denitrification. The aeration pipe is vertically arranged, and the air outlet of the aeration pipe faces upwards to the top of the aeration cover body. The aeration cover body guides the air flow, so that the air flow generated by the aerator enters the short-cut nitrification chamber through the first air outlet.
According to one embodiment of the invention, one side of the aeration cover body is connected with an auxiliary cover body, and the bottom of the auxiliary cover body is not contacted with the bottom of the shortcut nitrification chamber. The auxiliary cover body is communicated with the aeration cover body through a first air outlet; the first air outlet is arranged in the middle of the side wall of the aeration cover body; the bottom of the side wall of the auxiliary cover body is provided with a plurality of exhaust holes, the tail end of the auxiliary cover body, which is far away from the aeration cover body, is provided with a second air outlet, a horizontally arranged clapboard is arranged in the auxiliary cover body, and the clapboard and the second air outlet are oppositely arranged.
Furthermore, a plurality of exhaust holes are uniformly distributed at the top and the bottom of the side wall of the auxiliary cover body.
Therefore, the flow direction of the aeration airflow can be changed by arranging the auxiliary cover body. The aeration airflow enters the auxiliary cover body from the side wall of the aeration cover body, and is divided into an upper direction and a lower direction to flow under the action of the partition plate. There is certain space interval between the bottom of the supplementary cover body and the bottom of short distance nitration room, the aeration air current of cutting apart the downward flow by the baffle can sweep the bottom of short distance nitration room through the exhaust vent on the supplementary cover body lateral wall, be favorable to promoting the fluidic flow in reactor body bottom, prevent that mud from subsiding the siltation, the area of contact of bottom water and air current has also been enlarged, be favorable to the organic matter of dissolving or suspension in the water thoroughly to decompose, promote the indoor nitrification of short distance nitration to go on forward.
According to an embodiment of the invention, the top of the short-cut nitrification chamber is provided with a gas-collecting hood, the gas-collecting hood is arranged above the double-layer baffle with holes, and the top of the gas-collecting hood is provided with gas outlet holes which are positioned above the overflow weir and the water outlet pipe.
From this, the indoor gas of short distance nitrification overflows the back from the sieve mesh of double-deck utensil hole baffle, can keep in the gas collecting channel, reduces the discharge amount of the indoor oxygen of short distance nitrification, improves the oxygen content of the indoor sewage of short distance nitrification, strengthens nitrosation ability, improves nitrite yield.
According to one embodiment of the invention, the bottom of the double-layer perforated baffle is provided with a connecting buckle which is matched with the top end of the side wall of the shortcut nitrification chamber. So, can strengthen the stability of being connected of double-deck utensil hole baffle and reactor body, prevent that double-deck utensil hole baffle skew or rotation.
According to an embodiment of the invention, the top of the connecting buckle is connected with the bottom plate of the double-layer perforated baffle plate, a U-shaped opening is arranged on one side of the connecting buckle, which is far away from the double-layer perforated baffle plate, and the side wall of the short-cut nitrification chamber is embedded into the U-shaped opening. So, double-deck utensil hole baffle accessible U type opening is connected with the lateral wall detachable of the short distance nitration room, and the installation is dismantled portably, and the practicality is strong.
Because the invention adopts an integrated structure of the short-cut nitrification chamber and the anaerobic ammonia oxidation chamber which are internally and externally sleeved, oxygen limitation and anaerobic zoning can be realized in the same reactor, enrichment of functional flora is facilitated, stable and efficient autotrophic nitrogen removal is realized, and the nitrogen removal capability is improved; compared with a split type short-cut nitrification-anaerobic ammonia oxidation denitrification device, the device has compact structure, small occupied area, energy conservation and economy. The air flow distribution assembly and the aerator are arranged, so that the oxygen content of sewage is improved, the nitrification efficiency is improved, the reaction time is shortened, and the energy consumption is reduced. The water flow and the air flow in the shortcut nitrification chamber are arranged in different directions, and an internal circulation is formed between the shortcut nitrification chamber and the anaerobic ammonia oxidation chamber, so that the mud-water mixing is enhanced, the system stability is enhanced, and the denitrification efficiency is improved. The sufficient mixing of air current and rivers can promote the mud granulation, and the internal circulation of muddy water flows and can also prevents sludge deposition, and detachable sludge interception subassembly can prevent that mud from losing. Therefore, the invention is the integrated internal circulation autotrophic nitrogen removal device with enhanced sludge retention performance, which has high sludge granulation degree, high sludge concentration in the reactor, high nitrogen removal efficiency and stable reaction system operation.
Drawings
FIG. 1 is a schematic front view showing the structure of an internal circulation autotrophic nitrogen removal device for enhancing sludge retention according to example 1 of the present invention;
FIG. 2 is a top view of the internal circulation autotrophic nitrogen removal device shown in FIG. 1;
FIG. 3 is a schematic sectional view of the internal circulation autotrophic nitrogen removal device shown in FIG. 2, taken along the line A-A;
FIG. 4 is a schematic structural view of a double-layer perforated baffle of the internal circulation autotrophic nitrogen removal device shown in FIG. 1;
FIG. 5 is a schematic structural view of a gas-water flow-dividing assembly of the internal circulation autotrophic nitrogen removal device shown in FIG. 1;
FIG. 6 is a schematic perspective view of the aeration hood body and the auxiliary hood body of the internal circulation autotrophic nitrogen removal device shown in FIG. 1;
FIG. 7 is a top view of the aeration hood and auxiliary hood shown in FIG. 6;
FIG. 8 is a schematic cross-sectional view of the aeration hood body and the auxiliary hood body shown in FIG. 7, taken along line B-B;
FIG. 9 is a schematic front view showing the structure of an internal circulation autotrophic nitrogen removal device with enhanced sludge retention according to example 2 of the present invention;
FIG. 10 is a top view of the internal circulation autotrophic nitrogen removal device shown in FIG. 9;
FIG. 11 is a schematic sectional view of the internal circulation autotrophic nitrogen removal device shown in FIG. 10, taken along the line C-C;
FIG. 12 is a schematic sectional view of the internal circulation autotrophic nitrogen removal device shown in FIG. 10, taken along the line D-D;
FIG. 13 is an enlarged view of a portion E of FIG. 12;
FIG. 14 is a schematic structural view of a gas-water flow-dividing assembly of the internal circulation autotrophic nitrogen removal device shown in FIG. 9;
FIG. 15 is a schematic structural view of a connecting buckle of the internal circulation autotrophic nitrogen removal device shown in FIG. 9;
reference numerals: a reactor body 100; an annular partition plate 101; a short-cut nitrification chamber 10; a first through hole 11; a second through hole 12; a straight connecting pipe 13; an extension tube 131; a U-shaped connecting pipe 14; an anammox chamber 20; a sludge retention assembly 21; a weir 102; a water outlet pipe 103; a gas-collecting channel 104; an air outlet hole 105; a double-layer apertured baffle 30; an upper partition plate 31; a lower partition plate 32; a screen hole 33; a connecting buckle 34; a U-shaped opening 341; a gas-water diversion assembly 40; a water inlet pipe 41; a water inlet pipe body 411; a water outlet pipe body 412; a breather pipe 42; a shunt 421; a water filtering hole 43; an aerator 50; an aeration pipe 51; an aeration hood body 52; a first air outlet 521; an auxiliary cover body 53; an exhaust hole 531; a second outlet 532; a partition 533.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1:
fig. 1 to 8 schematically show an internal circulation autotrophic nitrogen removal device for enhancing sludge retention according to an embodiment of the present invention. As shown in the figure, this device includes cylindrical reactor body 100, and reactor body 100 is a closed reaction vessel in open-top bottom, and its inside is equipped with cyclic annular division board 101, divides into two reaction units that the endotheca was established inside and outside the inner chamber of reactor body 100: a cylindrical shortcut nitrification chamber 10 at the inner part and an anaerobic ammonia oxidation chamber 20 at the periphery, wherein the annular isolation plate 101 is the side wall of the shortcut nitrification chamber 10. The middle part of the side wall of the shortcut nitrification chamber 10 is provided with a plurality of first through holes 11, the bottom part of the side wall is provided with a plurality of second through holes 12, and the first through holes 11 and the second through holes 12 communicate the inner cavity of the shortcut nitrification chamber 10 with the inner cavity of the anaerobic ammonia oxidation chamber 20.
The top of the reactor body 100 is provided with a circular double-layer perforated baffle 30, and the double-layer perforated baffle 30 can block the opening on the top of the reactor body 100. The double-layer perforated baffle 30 comprises an upper-layer partition plate 31 and a lower-layer partition plate 32 which are arranged in parallel, wherein the upper-layer partition plate 31 and the lower-layer partition plate 32 are both provided with a plurality of sieve holes 33, and a certain gap is formed between the upper-layer partition plate 31 and the lower-layer partition plate 32. The sewage to be treated and the sewage after denitrification treatment enter and exit the reactor body 100 through the sieve holes 33 on the double-layer perforated baffle 30.
The top of the short-cut nitrification chamber 10 is provided with a water distributor, and the bottom is provided with an aerator 50. The water distributor is provided with a gas-water diversion assembly 40, and the gas-water diversion assembly 40 is arranged in a gap space inside the double-layer perforated baffle 30 and comprises a T-shaped water inlet pipe 41 and a vent pipe 42. The T-shaped water inlet pipe 41 comprises a vertically arranged water inlet pipe 411 and a horizontally arranged water outlet pipe 412, wherein the water inlet end of the water inlet pipe 411 is communicated with the sewage to be treated, and the other end of the water inlet pipe passes through the sieve holes 33 of the upper-layer partition plate 31 and is communicated with the middle part of the water outlet pipe 412 arranged in the gap inside the double-layer perforated baffle plate 30. Both ends of the water outlet pipe body 412 can discharge water. The air pipes 42 correspond to the outlets of the water outlet pipe body 412 one by one, and the air pipes 42 are arranged in parallel with the water inlet pipe body 411. The top of the vent pipe 42 is connected with the output end of the micro blower, the input end of the micro blower is communicated with the outside air, and the output end passes through the sieve holes 33 of the upper partition plate 31 and is communicated with the vent pipe 42. The connection part of the water outlet pipe body 412 and the vent pipe 42 is arranged at the top of the vent pipe 42 and is positioned at the downstream of the micro blower, and a plurality of water filtering holes 43 are uniformly distributed on the side wall of the vent pipe 42.
The bottom of the short-cut nitrification chamber 10 is provided with an aerator 50, the output end of the aerator 50 is provided with an aerator pipe 51, the aerator pipe 51 is vertically arranged, and the air outlet of the aerator pipe 51 faces upwards to the top of the aeration cover body 52. The aeration pipe 51 is disposed inside the aeration cover 52, and the first air outlet 521 is disposed on the aeration cover 52. One side of the aeration cover body 52 is connected with an auxiliary cover body 53, and the bottom of the auxiliary cover body 53 is not contacted with the bottom of the short-cut nitrification chamber 10. The inner cavity of the auxiliary cover body 53 is communicated with the inner cavity of the aeration cover body 52 through a first air outlet 521; the first air outlet 521 is arranged in the middle of the side wall of the aeration cover body 52; a plurality of exhaust holes 531 are distributed at the bottom of the side wall of the auxiliary hood body 53, a second air outlet 532 is arranged at the end of the auxiliary hood body 53 far away from the aeration hood body 52, a partition 533 which is horizontally arranged is arranged in the auxiliary hood body 53, and the partition 533 is arranged opposite to the second air outlet 532.
The side wall of the short-cut nitrification chamber 10 is provided with a first through hole 11 and a second through hole 12, the first through hole 11 is communicated with the anaerobic ammonia oxidation chamber 20 through a straight connecting pipe 13, and the second through hole 12 is communicated with the anaerobic ammonia oxidation chamber 20 through a U-shaped connecting pipe 14. The U-shaped connecting pipe 14 is positioned in the shortcut nitrification chamber 10, the tail end is a water inlet tail end, the tail end is a water outlet tail end, and the height of the water inlet tail end is higher than that of the water outlet tail end.
The top of the anaerobic ammonia oxidation chamber 20 is provided with a sludge interception component 21 arranged inside the double-layer perforated baffles 30, and the sludge interception component 21 comprises interception filler filled in the gap between the double-layer perforated baffles 30 and can be used for intercepting sludge.
The top of the double-layer perforated baffle 30 is provided with an overflow weir 102, and the overflow weir 102 is communicated with a water outlet pipe 103; the bottom of the outlet pipe 103 is flush with the top of the double-layer perforated baffle 30.
The sewage to be treated enters the inner gap of the double-layer perforated baffle 30 through the water distributor and enters the reactor body 100 through the screen holes 33 on the lower partition plate 32. Specifically, the sewage to be treated vertically enters the water outlet pipe body 412 from the water inlet pipe body 411 of the T-shaped water inlet pipe 41, and is divided to the water outlets at the two ends of the water outlet pipe body 412. The sewage flows into the vertical and downward extending vent pipe 42 through the outlet of the outlet pipe body 412, and the vent pipe 42 can intake air downward under the action of the micro blower. Within the vent tube 42, the downward air flow is mixed with the downward sewage flow.
The water outlet pipe body 412 is used for shunting the sewage, so that the contact area of the water body and the airflow can be enlarged, the mixing degree of the sewage and the airflow is improved, and the content of dissolved oxygen in the sewage water body can be improved. The air flow in the vent pipe 42 has a certain impact effect on the sewage, so that the sewage flow fluctuates and swirls in a certain range, collision among various components in the water body is accelerated, sludge mixing and granulation in the water body are promoted, dissolution of oxygen in the water body is further accelerated, and growth of aerobic bacteria is facilitated.
After the sewage enters the vent pipe 42, part of the sewage overflows from the water filtering holes 43, and the sewage is separated by the water filtering holes 43 and then mixed again in the clearance space of the double-layer perforated baffle 30, so that the mixing degree of different components in the water can be improved, the sludge is prevented from being agglomerated or flocculated, the granulation degree of the sludge is improved, and the survival of microorganisms is facilitated.
The sewage in the gap inside the double-layer perforated baffle 30 enters the short-cut nitrification chamber 10 through the sieve holes 33 on the lower-layer partition plate 32. The aerator 50 at the bottom of the short-cut nitrification chamber 10 aerates to further improve the content of dissolved oxygen in the sewage body.
An aeration cover 52 and an auxiliary cover 53 are provided on the top of the aerator 50 to change the flow direction of the air discharged from the aeration pipe 51. The upward aeration air flow discharged from the aeration pipe 51 enters the inside of the auxiliary hood 53 through the first air outlet 521 on the aeration hood 52, and flows toward the end of the auxiliary hood 53 away from the aeration hood 52. When the aeration airflow passes through the partition 533, under the dividing action of the partition 533, a part of the airflow bypasses the partition 533 upwards and is discharged from the second air outlet 532, and is mixed into the wastewater in the shortcut nitrification chamber 10, and the other part of the airflow bypasses the partition 533 downwards and is discharged downwards through the air outlet 531. The bottom of the auxiliary cover body 53 is suspended above the bottom of the short-cut nitrification chamber 10, aeration airflow discharged from the exhaust holes 531 is mixed with sewage water at the bottom of the auxiliary cover body 53, water and substrate upward flowing at the bottom of the short-cut nitrification chamber 10 can be promoted, sludge sedimentation is avoided, sludge granularity is kept, floc is prevented, meanwhile, the lifting of gas and water flow contact area is facilitated, and the decomposition of organic substances in the water is promoted. The exhaust holes 531 on the auxiliary cover body 53 are provided in a plurality, and aeration air flows can be discharged from different angles, so that sludge at the bottom of the short-cut nitrification chamber 10 is swept from multiple angles, the flow of water at the bottom layer is promoted, and dead angles are avoided.
The sewage in the short-cut nitrification chamber 10 and the aeration airflow at the bottom flow in a different direction, so that the content of dissolved oxygen in the water body is improved, and the good-culture flora is favorably cultured. When the oxygen content in the water body reaches a certain range, ammonia oxidizing bacteria in the water body can convert part of ammonia nitrogen in the sewage into nitrite nitrogen.
The sewage in the short-cut nitrification chamber 10 can enter the anaerobic ammonia oxidation chamber 20 through the U-shaped connecting pipe 14 and the second through hole 12. A large amount of dissolved oxygen is consumed in the nitrification in the water body, and after the dissolved oxygen enters the anaerobic ammonia oxidation chamber 20, an aeration device is not arranged, so that the oxygen content in the sewage water body is greatly reduced compared with that in the short-cut nitrification chamber 10, and the culture of anaerobic flora is facilitated. In the anaerobic ammonia oxidation chamber 20, denitrifying bacteria generate N under the action of anaerobic ammonia oxidation sludge by taking the generated nitrite as an electron acceptor and the unconverted ammonia nitrogen in the inlet water as an electron donor2And green denitrification is realized. N formed during anammox process2In the escaping process, the sewage and the anaerobic ammonia oxidation sludge are stirred, so that the sludge is prevented from depositing and flocculating, and dead zones are avoided.
The water in the anaerobic ammonia oxidation chamber 20 can also enter the shortcut nitrification chamber 10 through the first through hole 11 and the straight connecting pipe 13 to form internal circulation of the water. The sewage circularly flows between the shortcut nitrification chamber 10 and the anaerobic ammonia oxidation chamber 20 for many times, and the undecomposed ammonia nitrogen in the water body can be denitrified again, so that the denitrification effect is improved.
The existence of the U-shaped connecting pipe and the straight connecting pipe 13 promotes the whole reactor body 100 to form internal circulation of sewage and sludge under the action of water inlet impact force and buoyancy force of gas escape, shortens the process flow of biological denitrification, reduces the discharge amount of residual sludge and carbon dioxide, and reduces the operation cost.
The water body after repeated denitrification can be discharged from the top of the anaerobic ammonia oxidation chamber 20, enter the overflow weir 102 and the water outlet pipe 103 and be discharged out of the reactor body 100. The sludge interception component 21 at the top of the anaerobic ammonia oxidation chamber 20 is interception filler filled in the gap inside the double-layer baffle plate 30 with holes, is composed of one or two of elastic filler and combined filler, and can effectively intercept sludge lost due to sewage impact. The detachable double-layer perforated baffle 30 and the sludge interception component 21 are easy to clean and replace, low in energy consumption, capable of effectively preventing blockage, economical and energy-saving.
The sewage is impacted by airflow in the reactor body 100 and is in a flowing state under the action of inner circulation, the sludge granulation degree is high, the sludge loss is low, the concentration of functional flora in the reactor body 100 can be ensured, and the denitrification efficiency is improved. The water in the reactor body 100 circularly flows in the two treatment unit parts, so that the stability of denitrification reaction can be improved.
The short-cut nitrification chamber 10 and the anaerobic ammonia oxidation are internally and externally sleeved to form an integrated completely autotrophic nitrogen removal device, the internal short-cut nitrification chamber 10 provides aerobic conditions for ammonia oxidizing bacteria, the external anaerobic ammonia oxidation chamber 20 provides anaerobic conditions for anaerobic ammonia oxidizing bacteria, and the two treatment units are relatively independent, so that the growth of different functional floras can be ensured, and the nitrogen removal efficiency can be improved; the inner and outer treatment units are communicated by the first through hole 11 and the second through hole 12, and the denitrification effect can be ensured by the internal circulation flow of the water body. In addition, the whole-process autotrophic nitrogen removal process can save 60% of aeration amount, does not need to add exogenous organic matters, has small process occupied area, can effectively reduce the operation cost and avoid secondary pollution risk, and meets the requirements of environmental protection and energy conservation.
Example 2:
fig. 9 to 15 schematically show an internal circulation autotrophic nitrogen removal device for enhancing sludge retention according to another embodiment of the present invention. The difference from example 1 is that:
in the air-water diversion assembly 40, a plurality of diversion pipes 421 are connected to the bottom of the vent pipe 42, and the diversion pipes 421 are arranged below the water outlet pipe body 412. The side wall of the shunt tube 421 is also provided with a drainage hole 43. Thus, after entering the vent pipe 42 and mixing with the air flow, the sewage can be shunted again through the shunt pipe 421, and the water is split and mixed again through the drainage holes 43 on the side wall of the shunt pipe 421, so that the mixing of different components can be improved. The water body can further improve the granulation degree of the sludge and prevent flocculation and agglomeration in the process of cutting and mixing.
On the side wall of the short-cut nitrification chamber 10, a straight connecting pipe 13 connected with the first through hole 11 may be connected at its end with an extension pipe 131 extending downward. The extension pipe 131 is arranged to prevent the sewage in the straight connecting pipe 13 from flowing backwards, so that the continuity of the sludge and the internal circulation of the sewage is ensured. In addition, the sewage discharged from the extension pipe 131 intensively impacts a certain area at the bottom of the shortcut nitrification chamber 10, so that sludge deposition can be avoided, the mixing of sewage and sludge can be promoted, the granulation of sludge can be promoted, and the sludge retention performance can be improved.
In order to prevent the sewage discharged from the extension pipe 131 from entering the U-shaped connection pipe 14, the end of the extension pipe 131 far from the first through hole 11 is bent in a direction far from the side wall of the shortcut nitrification chamber 10, i.e., bent toward the center of the shortcut nitrification chamber 10. In this way, the mixing of the sewage discharged from the extension pipe 131 with the gas discharged from the aerator 50 can be promoted, the oxygen content can be increased, and the nitrification of the ammonia oxidizing bacteria can be promoted.
The exhaust holes 531 of the auxiliary cover 53 are distributed at the bottom, and the exhaust holes 531 are not formed at the top thereof.
The bottom of the double-layer perforated baffle 30 is provided with a connecting buckle 34, and the connecting buckle 34 is matched with the side wall of the short-distance nitrification chamber 10. The top of the connecting buckle 34 is connected with the bottom surface of the lower partition plate 32 of the double-layer perforated baffle plate 30, a U-shaped opening 341 is arranged on one side of the connecting buckle 34 far away from the double-layer perforated baffle plate 30, and the side wall of the short-distance nitrification chamber 10 is embedded into the U-shaped opening 341. So, bilayer utensil hole baffle 30 accessible U type opening 341 is connected with the lateral wall detachable of short distance nitration room 10, and the installation is dismantled portably, and the practicality is strong.
The top of the short-cut nitrification chamber 10 is provided with a gas-collecting hood 104, the gas-collecting hood 104 is arranged above the double-layer baffle plate 30 with holes, the top of the gas-collecting hood 104 is provided with gas outlet holes 105, and the gas outlet holes 105 are positioned above the overflow weir 102 and the water outlet pipe 103. Therefore, after the gas in the short-cut nitrification chamber 10 overflows from the sieve holes 33 of the double-layer perforated baffle plate 30, the gas can be temporarily stored in the gas collecting hood 104, the discharge amount of oxygen in the short-cut nitrification chamber 10 is reduced, the oxygen content of sewage in the short-cut nitrification chamber 10 is improved, the nitrosation capacity is enhanced, and the generation amount of nitrite is increased.
Example 3
This example differs from example 2 in that:
the cylindrical aeration cover body 52 is uniformly distributed with 3 first air outlets 521 along the circumferential direction, and the auxiliary cover body 53 is annular and surrounds the periphery of the aeration cover body 52. Therefore, the area for sweeping the bottom of the short-cut nitrification chamber 10 through the exhaust hole 531 on the auxiliary cover body 53 is large, no dead angle exists, the sludge is promoted to flow along with the water body, and the sludge retention performance is enhanced.
The embodiments described above are intended to illustrate the technical solutions of the present invention in detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modification, supplement or similar substitution made within the scope of the principles of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An internal circulation autotrophic nitrogen removal device for enhancing sludge retention performance comprises a reactor body (100), and is characterized in that the reactor body (100) comprises a shortcut nitrification chamber (10) and an anaerobic ammonia oxidation chamber (20) which are sleeved inside and outside, wherein the shortcut nitrification chamber (10) is communicated with the anaerobic ammonia oxidation chamber (20) through a first through hole (11) and a second through hole (12); the first through hole (11) is formed in the middle of the side wall of the shortcut nitrification chamber (10), and the second through hole (12) is formed in the bottom of the side wall of the shortcut nitrification chamber (10); the top of the reactor body (100) is provided with a detachable double-layer perforated baffle (30);
the top of the short-cut nitrification chamber (10) is provided with a water distributor, and the bottom of the short-cut nitrification chamber (10) is provided with an aerator (50); the water distributor is provided with a gas-water diversion assembly (40), the gas-water diversion assembly (40) comprises a T-shaped water inlet pipe (41) and a vent pipe (42), the water outlet of the T-shaped water inlet pipe (41) is arranged inside the double-layer perforated baffle (30), and the vent pipe (42) is communicated with the water outlet of the T-shaped water inlet pipe (41);
a sludge interception component (21) is arranged at the top of the anaerobic ammonia oxidation chamber (20), and the sludge interception component (21) is arranged inside the double-layer perforated baffle plate (30); the top of the double-layer perforated baffle plate (30) is provided with an overflow weir (102), and the overflow weir (102) is communicated with a water outlet pipe (103); the bottom of the water outlet pipe (103) is flush with the top of the double-layer perforated baffle plate (30).
2. The internal circulation autotrophic nitrogen removal device with enhanced sludge retention according to claim 1, wherein the first through hole (11) is in communication with the anammox chamber (20) through a straight connecting pipe (13); the second through hole (12) is communicated with the anaerobic ammonia oxidation chamber (20) through a U-shaped connecting pipe (14), one side of the U-shaped connecting pipe (14) in the shortcut nitrification chamber (10) is provided with a water inlet tail end, one side of the U-shaped connecting pipe (14) in the anaerobic ammonia oxidation chamber (20) is provided with a water outlet tail end, and the height of the water inlet tail end is higher than that of the water outlet tail end.
3. The device for enhancing sludge retention according to claim 1, wherein the T-shaped water inlet pipe (41) comprises a vertically arranged water inlet pipe body (411) and a horizontally arranged water outlet pipe body (412), water is discharged from two ends of the water outlet pipe body (412), the vent pipes (42) correspond to the water outlets of the water outlet pipe body (412) in a one-to-one manner, and the vent pipes (42) are arranged in parallel with the water inlet pipe body (411).
4. The enhanced sludge retention performance internal circulation autotrophic nitrogen removal device according to claim 3, wherein the end of the water outlet pipe body (412) is communicated with the top of the aeration pipe (42), and the side wall of the aeration pipe (42) is configured with water filtering holes (43).
5. The internal circulation autotrophic nitrogen removal device with enhanced sludge retention according to claim 1, wherein an aeration pipe (51) is disposed at an output end of the aerator (50), the aeration pipe (51) is disposed inside an aeration cover body (52), and a first air outlet (521) is disposed on the aeration cover body (52).
6. The internal circulation autotrophic nitrogen removal device with enhanced sludge retention according to claim 5, wherein an auxiliary cover body (53) is connected to one side of the aeration cover body (52), and the auxiliary cover body (53) is in communication with the aeration cover body (52) through the first air outlet (521); the first air outlet (521) is arranged in the middle of the side wall of the aeration cover body (52);
the bottom of the side wall of the auxiliary cover body (53) is provided with a plurality of exhaust holes (531), the tail end of the auxiliary cover body (53) far away from the aeration cover body (52) is provided with a second air outlet (532), a horizontally arranged partition plate (533) is arranged in the auxiliary cover body (53), and the partition plate (533) is arranged opposite to the second air outlet (532).
7. The enhanced sludge retention internal circulation autotrophic nitrogen removal device according to claim 1, wherein a gas collecting hood (104) is disposed at the top of the short-cut nitrification chamber (10), the gas collecting hood (104) is disposed above the double-layer perforated baffle (30), and a gas outlet hole (105) is disposed at the top of the gas collecting hood (104), and the gas outlet hole (105) is located above the overflow weir (102) and the water outlet pipe (103).
8. The internal circulation autotrophic nitrogen removal device with enhanced sludge retention according to claim 1, wherein the bottom of the double-layered perforated baffle plate (30) is configured with a connecting buckle (34), and the connecting buckle (34) is matched with the side wall of the shortcut nitrification chamber (10).
9. The device for enhancing sludge retention according to claim 8, wherein the top of the connecting buckle (34) is connected with the bottom plate of the double-layer perforated baffle (30), a U-shaped opening (341) is arranged on one side of the connecting buckle (34) far away from the double-layer perforated baffle (30), and the side wall of the shortcut nitrification chamber (10) is embedded into the U-shaped opening (341).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101617426B1 (en) * | 2015-07-24 | 2016-05-03 | 주식회사 송림 | Advanced water-treating apparatus |
| CN108046430A (en) * | 2017-12-14 | 2018-05-18 | 浙江海洋大学 | A kind of integration whole process autotrophic denitrification device |
| CN207918536U (en) * | 2017-12-19 | 2018-09-28 | 马鞍山市三环碧源水处理工程有限公司 | A kind of aerobic tank aeration cover |
| CN109231493A (en) * | 2018-10-26 | 2019-01-18 | 浙江海洋大学 | A kind of low C/N high ammonia-nitrogen wastewater processing unit |
| CN208454616U (en) * | 2018-05-04 | 2019-02-01 | 山东格瑞博环保科技有限公司 | A kind of autotrophic denitrification membrane bioreactor |
-
2021
- 2021-09-09 CN CN202111054667.6A patent/CN113697959A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101617426B1 (en) * | 2015-07-24 | 2016-05-03 | 주식회사 송림 | Advanced water-treating apparatus |
| CN108046430A (en) * | 2017-12-14 | 2018-05-18 | 浙江海洋大学 | A kind of integration whole process autotrophic denitrification device |
| CN207918536U (en) * | 2017-12-19 | 2018-09-28 | 马鞍山市三环碧源水处理工程有限公司 | A kind of aerobic tank aeration cover |
| CN208454616U (en) * | 2018-05-04 | 2019-02-01 | 山东格瑞博环保科技有限公司 | A kind of autotrophic denitrification membrane bioreactor |
| CN109231493A (en) * | 2018-10-26 | 2019-01-18 | 浙江海洋大学 | A kind of low C/N high ammonia-nitrogen wastewater processing unit |
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