CN114933401A - Municipal sludge reduction coupling autotrophic nitrogen removal treatment system - Google Patents
Municipal sludge reduction coupling autotrophic nitrogen removal treatment system Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 170
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 230000001651 autotrophic effect Effects 0.000 title claims abstract description 64
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 52
- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- 230000009467 reduction Effects 0.000 title abstract description 11
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 77
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims description 50
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 22
- 230000001546 nitrifying effect Effects 0.000 claims description 13
- 239000000523 sample Substances 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000005273 aeration Methods 0.000 claims description 11
- 229910021529 ammonia Inorganic materials 0.000 claims description 11
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- 238000000520 microinjection Methods 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000006396 nitration reaction Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
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- 238000012856 packing Methods 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 abstract description 9
- 238000000855 fermentation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
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- 238000005119 centrifugation Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
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- 238000006460 hydrolysis reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 208000005156 Dehydration Diseases 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 3
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- 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
- C02F3/302—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
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- 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
-
- 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
- Y02W10/20—Sludge processing
Abstract
The invention provides a treatment system for municipal sludge decrement coupling autotrophic nitrogen removal, which comprises: a sludge nitrification centrifugal system, a nitrite reactor, an autotrophic nitrogen removal reactor and a centrifugal sludge storage tank; after sludge produced by an urban domestic sewage plant is subjected to anaerobic nitrification and centrifugation, part of produced filtrate is subjected to short-cut nitrification reaction to generate nitrite, and the other part of the produced filtrate enters an autotrophic nitrogen removal system; one part of the generated nitrite flows back to the sludge nitrification centrifugal system, and the other part of the generated nitrite enters the autotrophic nitrogen removal reactor; and (4) the filtrate after the autotrophic denitrification reaction enters a centrifugal sludge storage tank, and finally the diluted sludge is dewatered. The invention fully utilizes the sludge fermentation liquor, improves the sludge reduction effect and the sludge stability by generating nitrite, and in addition, utilizes the autotrophic nitrogen removal technology to treat the high ammonia nitrogen byproducts of the nitrified sludge, reduces the subsequent sludge treatment load and the problem of filtrate byproduct treatment, thereby being an efficient and economic sludge advanced treatment system.
Description
Technical Field
The invention relates to the technical field of municipal sludge treatment, in particular to a treatment system for municipal sludge decrement coupling autotrophic nitrogen removal.
Background
Due to the demands of urbanization and economic development, the sewage yield and treatment capacity of cities are on the rise in recent years, the annual output of sludge is increased, and only 20% of sludge is treated properly according to statistics. With the transformation of the concept of 'heavy water light mud' to 'mud water heavy', higher requirements and standards are provided for sludge treatment.
Anaerobic nitrification of sludge is one of the common means for sludge reduction and stabilization, and is the most economical sludge treatment method for sewage plants. Anaerobic nitrification of sludge refers to the decomposition of biodegradable organic matters in sludge into CO by facultative bacteria and anaerobic bacteria under anaerobic condition 2 、CH 4 And H 2 O, etc., to stabilize the sludge. But the reaction rate is slow, the fermentation efficiency is low, nitrifying liquid containing high ammonia nitrogen can be generated, and the subsequent treatment and discharge increase the economic investment.
Disclosure of Invention
Aiming at the problems that the nitrification efficiency of the traditional sludge anaerobic nitrification technology is low, the nitrified liquid contains high ammonia nitrogen and the like, the embodiment of the application provides a treatment system for urban sludge decrement coupling autotrophic nitrogen removal. According to the method, the high-ammonia nitrogen nitrifying liquid is converted into nitrite by utilizing a shortcut nitrification reaction, and the nitrite is added into the nitrified sludge to promote the hydrolysis and reduction of the sludge, so that the anaerobic nitrification efficiency of the sludge is improved; the nitrite and ammonia nitrogen are subjected to anaerobic ammonia oxidation reaction to remove the ammonia nitrogen in the nitrified liquid, so that the problem that the nitrified liquid contains high ammonia nitrogen is solved, and the reaction equation is as follows:
the embodiment of the application provides the following technical scheme: a treatment system for municipal sludge decrement coupling autotrophic nitrogen removal comprises: a sludge nitrification centrifugal system, a nitrite reactor, an autotrophic nitrogen removal reactor and a centrifugal sludge storage tank;
the sludge nitrification centrifugal system is used for performing anaerobic nitrification on sludge to be treated and then performing centrifugal separation, and a nitrification liquid outlet of the sludge nitrification centrifugal system is respectively connected with the feed inlets of the nitrite reactor and the autotrophic nitrogen removal reactor;
the nitrite reactor is used for carrying out nitration reaction on the nitrified liquid to convert ammonia nitrogen in the nitrified liquid into nitrite, and a liquid outlet of the nitrite reactor is respectively connected with the sludge nitrification centrifugal system and a liquid inlet of the autotrophic nitrogen removal reactor;
the autotrophic denitrification reactor is used for carrying out autotrophic denitrification reaction on the nitrite from the nitrite reactor and the nitrifying liquid from the sludge nitrification centrifugal system, and converting ammonia nitrogen and nitrite in the nitrifying liquid into nitrogen together;
and a sludge outlet of the sludge nitrification centrifugal system and an outlet of the autotrophic nitrogen removal reactor are both connected with the centrifugal sludge storage tank.
According to one implementation mode of the embodiment of the application, nitrified liquid produced by the sludge nitrification centrifugal system enters the nitrite reactor and the autotrophic nitrogen removal reactor respectively according to the ratio of 3-3.5: 1.
According to an implementation mode of this application embodiment, including aeration equipment and nitrous, ammonia nitrogen, pH monitor probe in the nitrous reactor, through aeration equipment aeration will nitrify the liquid and carry out nitration, adopt simultaneously nitrous, ammonia nitrogen, pH monitor probe carry out real-time supervision, make the ammonia nitrogen in the nitrifying liquid turn into nitrite.
According to an implementation mode of the embodiment of the application, a micro-injection pump is arranged on a pipeline between the liquid outlet of the nitrite reactor and the liquid inlet of the sludge nitrification centrifugal system, and 0.04gNO is used for feeding the nitrogen through the micro-injection pump 2 - Adding the generated nitrite into the sludge nitrification centrifugal system by the aid of the adding amount of N/gVSS and a continuous dropwise adding mode.
According to an embodiment of this application embodiment, set up ammonia nitrogen, nitrite, dissolved oxygen real-time supervision probe and anaerobic ammonia oxidation biomembrane filler frame in the autotrophic denitrification reactor, utilize anaerobic ammonia oxidation biomembrane to carry out the autotrophic denitrification reaction, adopt simultaneously ammonia nitrogen, nitrite, dissolved oxygen real-time supervision probe carry out real-time supervision, make ammonia nitrogen and nitrite turn into nitrogen gas jointly.
According to one implementation mode of the embodiment of the application, the stirrer is arranged at the bottom of the anaerobic ammonia oxidation biofilm packing frame.
According to an implementation mode of the embodiment of the application, the sludge nitrification centrifugal system further comprises a sludge storage tank and a first sludge inlet pump, wherein the sludge storage tank is connected with a feed inlet of the sludge nitrification centrifugal system through the first sludge inlet pump and used for pumping the stored sludge to be treated into the sludge nitrification centrifugal system.
According to an implementation mode of this application embodiment, still include sheet frame hydroextractor and second and advance the dredge pump, the mud export of centrifugation mud holding vessel with the sheet frame hydroextractor passes through the second advances the dredge pump and connects for with sludge pump income in the sheet frame hydroextractor, carry out dehydration to mud.
According to an embodiment of this application embodiment, the nitrifying liquid outlet of sludge nitrification centrifugal system sets up one-way nitrifying liquid filtration pore and mud screw pump, through the mud screw pump will nitrify the liquid pump and pump into nitrite reactor with in the autotrophic nitrogen removal reactor.
According to an implementation mode of this application embodiment, set up the nitrosomas pump on the pipeline between the liquid outlet of nitrosomas reactor and the autotrophic nitrogen removal reactor liquid inlet, autotrophic nitrogen removal reactor liquid outlet with set up out the water pump on the pipeline between the centrifugal sludge storage tank.
Compared with the prior art, the treatment system for the municipal sludge decrement coupling autotrophic nitrogen removal, which is provided by the embodiment of the invention, adopts at least one technical scheme, so that the beneficial effects at least comprise that:
(1) according to the invention, the nitrite is added into the sludge anaerobic nitrification system, so that not only can the degradation of sludge organic matters be promoted and the hydrolysis degree of sludge be improved, but also the alkalinity in the system can be improved and the sludge fermentation efficiency can be promoted through the denitrification effect, and the problem of low anaerobic nitrification efficiency of the traditional sludge can be overcome.
(2) The invention fully utilizes the characteristic of high ammonia nitrogen of the sludge anaerobic fermentation liquor to convert the ammonia nitrogen into nitrite, promotes the nitrification and reduction of the sludge, and simultaneously can consume the ammonia nitrogen in the fermentation liquor through autotrophic denitrification reaction, thereby solving the problem that the nitrified liquor contains high ammonia nitrogen.
(3) The invention does not add other organic matters, realizes the resource and reduction utilization of the sludge on the basis of fully utilizing the products of the nitration system, and has higher economic benefit.
(4) The amount of nitrified sludge is reduced after being treated by nitrite, and the treated sludge has no peculiar smell, and has environmental and economic benefits for subsequent sludge treatment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a processing system architecture according to an embodiment of the present invention;
the system comprises a 1-sludge storage tank, a 2-sludge nitrification centrifugal system, a 3-nitrite reactor, a 4-autotrophic denitrification reactor, a 5-centrifugal sludge storage tank, a 6-plate-and-frame dehydrator, a 7-first sludge inlet pump, an 8-sludge screw pump, a 9-micro injection pump, a 10-nitrite feeding pump, an 11-water outlet pump, a 12-second sludge inlet pump, a 13-nitrite, ammonia nitrogen and pH monitoring probe, and a 14-ammonia nitrogen, nitrite and dissolved oxygen monitoring probe.
Detailed Description
Embodiments of the present application are described in detail below with reference to the accompanying drawings.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail with reference to the accompanying drawings, wherein the embodiments are described in detail, and it is to be understood that the embodiments are only a part of the embodiments of the present invention, and not all of the embodiments are described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a treatment system for municipal sludge decrement coupling autotrophic nitrogen removal, including: comprises a sludge storage tank 1, a sludge nitrification centrifugal system 2, a nitrite reactor 3, an autotrophic denitrification reactor 4, a centrifugal sludge storage tank 5, a plate-frame dehydrator 6, a first sludge inlet pump 7, a sludge screw pump 8, a micro-injection pump 9, a nitrite adding pump 10, a water outlet pump 11 and a second sludge inlet pump 12.
The sludge storage tank 1 is connected with the sludge nitrification centrifugal system 2 through a first sludge inlet pump 7; a liquid outlet on the outer side wall of the nitrification tank in the sludge nitrification centrifugal system 2 is provided with a unidirectional nitrification liquid filtering hole which is respectively connected with the nitrite reactor 3, the autotrophic denitrification reactor 4 and the centrifugal sludge storage tank 5; the nitrite reactor 3 adopts an aeration disc for aeration, is provided with a nitrite, ammonia nitrogen and pH monitoring probe 13, and is respectively connected with the sludge nitrification centrifugal system 2 and the autotrophic nitrogen removal reactor 4 through a micro-injection pump 9 and a nitrite adding pump 10; the autotrophic denitrification reactor 4 is provided with ammonia nitrogen, nitrite, a dissolved oxygen monitoring probe 14, an anaerobic ammonia oxidation polyurethane filling frame and a stirrer, and is connected with the centrifugal sludge storage tank 5 through a water outlet pump 11; the centrifugal sludge storage tank 5 is connected with the plate-frame dehydrator 6 through a second sludge inlet pump 12.
According to the embodiment of the invention, nitrite is added into the traditional anaerobic nitrification sludge, so that the hydrolysis efficiency and the reduction effect of the sludge are improved. Researches find that on one hand, nitrite can destroy a stable sludge structure by consuming sludge organic matters, and promote sludge hydrolysis; on the other hand, the alkalinity can be generated through the denitrification reaction, so that the pH value is increased, and the sludge reduction is promoted. In addition, the sludge nitrification liquid contains high ammonia nitrogen, short-range nitrification reaction is easy to occur through aeration to generate nitrite, the sludge nitrification hydrolysis is promoted, besides, the nitrite can also perform anaerobic ammonia oxidation reaction with the ammonia nitrogen, and conditions are provided for removing the high ammonia nitrogen in the nitrification liquid. The reaction equation is as follows:
the treatment process of the treatment system for the urban sludge decrement coupling autotrophic nitrogen removal comprises the following steps:
sludge generated in the running process of a municipal sewage treatment plant is stored in a sludge storage tank 1, the sludge is pumped into a sludge anaerobic nitrification tank of a sludge nitrification centrifugal system 2 through a first sludge inlet pump 7 for anaerobic nitrification of the sludge, the sludge in the anaerobic nitrification tank is firstly stood for anaerobic nitrification and then is subjected to low-speed centrifugal separation, the centrifuged nitrification liquid respectively enters a nitrite reactor 3 and an autotrophic nitrogen removal reactor 4 according to the proportion of 3-3.5:1, so that after nitrite generated in the nitrite reactor meets the requirement of the anaerobic digestion tank, anaerobic ammonia oxidation reaction is carried out in the autotrophic nitrogen removal reactor in the proportion of 1:1.32 to remove ammonia nitrogen. The centrifuged sludge enters a centrifugal sludge storage tank 5. The nitrifying liquid outlet of the sludge nitrification centrifugal system is provided with a one-way nitrifying liquid filtering hole and a sludge screw pump, and nitrifying liquid is pumped into the nitrite reactor and the autotrophic nitrogen removal reactor through the sludge screw pump.
Filtrate entering the nitrite reactor 3 contains high ammonia nitrogen, and after aeration by the aeration disc, the ammonia nitrogen is converted into nitrite through real-time monitoring of a nitrite, ammonia nitrogen and pH monitoring probe 13. When the content of nitrous acid reaches 10mg/L, the micro-injection pump 9 is started to make the content of nitrous acid be 0.03-0.05 gNO 2 - And the sludge is continuously added into a sludge anaerobic nitrification tank of the sludge nitrification centrifugal system 2 in a dropwise manner within the range of-N/gVSS, so that the sludge hydrolysis and reduction effects are promoted to the maximum extent, and the sludge is prevented from being irreversibly damaged. Meanwhile, the residual nitrite enters the autotrophic nitrogen removal reactor 4 through a nitrite feeding pump 10 to react.
Nitrite in a nitrite reactor 3 and high ammonia nitrogen nitrifying liquid from a sludge nitrification centrifugal system 2 are subjected to autotrophic denitrification reaction by using an anaerobic ammonia oxidation biomembrane in an autotrophic denitrification reactor 4, and ammonia nitrogen and nitrite are jointly converted into nitrogen.
Nitrified sludge after nitrite treatment is centrifugally concentrated and then stored in a centrifugal sludge storage tank 5, and effluent after anaerobic ammoxidation reaction in an autotrophic denitrification reactor 4 is diluted and then pumped into a plate-and-frame dehydrator 6 through a second sludge feeding pump 12 for dehydration treatment.
In the embodiment of the invention, after sludge generated by an urban domestic sewage plant is subjected to anaerobic nitrification and centrifugation, part of generated filtrate is subjected to short-cut nitrification reaction to generate nitrite, and the other part of the generated filtrate enters an autotrophic nitrogen removal system; one part of the generated nitrite flows back to the anaerobic nitrification tank, and the other part of the generated nitrite enters the autotrophic nitrogen removal system; and (3) the filtrate obtained after the reaction of the autotrophic nitrogen removal system enters a centrifugal sludge storage tank, and finally the diluted sludge enters a plate-and-frame dehydrator for dehydration. The invention fully utilizes the sludge fermentation liquor, improves the sludge reduction effect and the sludge stability by generating nitrite, and in addition, utilizes the autotrophic denitrification technology to treat the high ammonia nitrogen by-product of the nitrified sludge, reduces the subsequent sludge treatment load and the problem of filtrate by-product treatment, thereby being an efficient and economic sludge advanced treatment method.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a processing system of municipal sludge decrement coupling autotrophic denitrogenation which characterized in that includes: a sludge nitrification centrifugal system, a nitrite reactor, an autotrophic nitrogen removal reactor and a centrifugal sludge storage tank;
the sludge nitrification centrifugal system is used for performing anaerobic nitrification on sludge to be treated and then performing centrifugal separation, and a nitrification liquid outlet of the sludge nitrification centrifugal system is respectively connected with the feed inlets of the nitrite reactor and the autotrophic nitrogen removal reactor;
the nitrite reactor is used for carrying out nitration reaction on the nitrified liquid to convert ammonia nitrogen in the nitrified liquid into nitrite, and a liquid outlet of the nitrite reactor is respectively connected with the sludge nitrification centrifugal system and a liquid inlet of the autotrophic denitrification reactor;
the autotrophic denitrification reactor is used for carrying out autotrophic denitrification reaction on the nitrite from the nitrite reactor and the nitrifying liquid from the sludge nitrification centrifugal system, and converting ammonia nitrogen and nitrite in the nitrifying liquid into nitrogen together;
and a sludge outlet of the sludge nitrification centrifugal system and an outlet of the autotrophic nitrogen removal reactor are both connected with the centrifugal sludge storage tank.
2. The municipal sludge decrement-coupled autotrophic nitrogen removal processing system according to claim 1, wherein nitrified liquid produced by the sludge nitrification centrifugal system is fed into the nitrite reactor and the autotrophic nitrogen removal reactor respectively according to a ratio of 3-3.5: 1.
3. The municipal sludge decrement-coupled autotrophic nitrogen removal treatment system according to claim 1, wherein the nitrite reactor comprises an aeration device and nitrite, ammonia nitrogen and pH monitoring probes, wherein the aeration device is used for aeration to carry out nitration reaction on the nitrified liquid, and the nitrite, ammonia nitrogen and pH monitoring probes are used for real-time monitoring to convert ammonia nitrogen in the nitrified liquid into nitrite.
4. The municipal sludge decrement-coupled autotrophic nitrogen removal treatment system according to claim 3, wherein a micro-injection pump is disposed on the pipeline between the liquid outlet of the nitrite reactor and the liquid inlet of the sludge nitrification centrifugal system, and 0.04gNO is added by the micro-injection pump 2 - Adding the generated nitrite into the sludge nitrification centrifugal system by the adding amount of N/gVSS and a continuous dropwise adding mode.
5. The municipal sludge decrement-coupled autotrophic nitrogen removal treatment system according to claim 1, wherein the autotrophic nitrogen removal reactor is provided with ammonia nitrogen, nitrite, a dissolved oxygen real-time monitoring probe and an anaerobic ammonia oxidation biofilm filler rack, the anaerobic ammonia oxidation biofilm is used for autotrophic nitrogen removal reaction, and the ammonia nitrogen, nitrite and dissolved oxygen real-time monitoring probe are used for real-time monitoring, so that the ammonia nitrogen and nitrite are jointly converted into nitrogen.
6. The municipal sludge decrement-coupled autotrophic nitrogen removal treatment system according to claim 5, wherein a stirrer is arranged at the bottom of the anaerobic ammonia oxidation biofilm packing frame.
7. The municipal sludge decrement-coupled autotrophic nitrogen removal processing system according to claim 1, further comprising a sludge storage tank and a first sludge inlet pump, wherein the sludge storage tank is connected with the feed inlet of the sludge nitrification centrifugal system through the first sludge inlet pump, and is used for pumping the stored sludge to be processed into the sludge nitrification centrifugal system.
8. The municipal sludge decrement-coupled autotrophic nitrogen removal processing system according to claim 1, further comprising a plate-and-frame dehydrator and a second sludge feeding pump, wherein the sludge outlet of the centrifugal sludge storage tank is connected with the plate-and-frame dehydrator through the second sludge feeding pump, and is used for pumping sludge into the plate-and-frame dehydrator to dehydrate sludge.
9. The municipal sludge decrement-coupled autotrophic nitrogen removal treatment system according to claim 1, wherein the nitrification liquid outlet of the sludge nitrification centrifugal system is provided with a unidirectional nitrification liquid filtering hole and a sludge screw pump, and nitrification liquid is pumped into the nitrite reactor and the autotrophic nitrogen removal reactor through the sludge screw pump.
10. The municipal sludge decrement-coupled autotrophic nitrogen removal treatment system according to claim 1, wherein a nitrite adding pump is disposed on a pipeline between the liquid outlet of the nitrite reactor and the liquid inlet of the autotrophic nitrogen removal reactor, and a water outlet pump is disposed on a pipeline between the liquid outlet of the autotrophic nitrogen removal reactor and the centrifugal sludge storage tank.
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| CN202210638294.5A CN114933401B (en) | 2022-06-07 | 2022-06-07 | Urban sludge decrement coupling autotrophic nitrogen removal treatment system |
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| CN202210638294.5A CN114933401B (en) | 2022-06-07 | 2022-06-07 | Urban sludge decrement coupling autotrophic nitrogen removal treatment system |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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