CN115784433B - Method for rapidly culturing anaerobic ammonia oxidation granular sludge by using municipal domestic sewage - Google Patents
Method for rapidly culturing anaerobic ammonia oxidation granular sludge by using municipal domestic sewage Download PDFInfo
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- CN115784433B CN115784433B CN202211408087.7A CN202211408087A CN115784433B CN 115784433 B CN115784433 B CN 115784433B CN 202211408087 A CN202211408087 A CN 202211408087A CN 115784433 B CN115784433 B CN 115784433B
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- sludge
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- anaerobic ammonia
- ammonia oxidation
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- 239000010802 sludge Substances 0.000 title claims abstract description 84
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 230000003647 oxidation Effects 0.000 title claims abstract description 27
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 27
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 26
- 239000010865 sewage Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012258 culturing Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000009935 nitrosation Effects 0.000 claims abstract description 10
- 238000007034 nitrosation reaction Methods 0.000 claims abstract description 10
- 238000012163 sequencing technique Methods 0.000 claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 5
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000004062 sedimentation Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000004904 shortening Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 7
- 241001453382 Nitrosomonadales Species 0.000 abstract description 4
- 238000005273 aeration Methods 0.000 abstract description 3
- 241000894006 Bacteria Species 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 abstract 1
- 239000003814 drug Substances 0.000 abstract 1
- 235000015097 nutrients Nutrition 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 238000011081 inoculation Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- 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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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides a method for rapidly culturing anaerobic ammonia oxidation granular sludge by utilizing urban domestic sewage. The method comprises the following steps: (1) Taking traditional activated sludge as inoculated sludge in a sequencing batch reactor, wherein the quality of inlet water is urban domestic sewage; realizing three stages of anaerobic ammoxidation particle sludge nutrient cultivation; (2) culturing aerobic granular sludge: the time is shortened in the full aeration and precipitation stage of the aerobic section, and the mass concentration of the ammonia nitrogen in the effluent is ensured to be less than 5mg/L; (3) nitrosation granular sludge culture: the floccule sludge is discharged periodically to realize the elutriation of nitrite oxidizing bacteria, and the aerobic time is shortened to ensure that the mass concentration ratio of ammonia nitrogen to nitrite nitrogen is 1.0-1.5 after the aerobic section is finished; (4) anaerobic ammonia oxidation granular sludge culture: the anaerobic ammonia oxidizing bacteria are provided with an anoxic environment by prolonging the anoxic period time after the aerobic period; (5) The method only needs to construct or utilize the traditional activated sludge sewage biological treatment device and equipment, does not need to add medicament, and is beneficial to being applied to actual engineering.
Description
Technical Field
The invention belongs to the technical field of sewage biological treatment, and relates to a method for rapidly culturing anaerobic ammonia oxidation granular sludge by utilizing urban domestic sewage.
Background
The denitrification process is a main part of carbon and energy consumption in a sewage treatment plant, and compared with the traditional denitrification treatment of nitrification and denitrification, the anaerobic ammonia oxidation process can reduce 100% of carbon consumption and 60% of aeration energy consumption, and provides a new way for realizing low-consumption denitrification. However, there are some challenges to be solved in practical applications, such as low anaerobic ammonia oxidizing bacteria breeding rate, long doubling time, and often high sensitivity to changing environmental conditions, which makes them extremely difficult to cultivate. Therefore, too long anaerobic ammonia oxidation start-up period is an urgent problem to be solved
The granular sludge has good sedimentation performance, can effectively retain anaerobic ammonia oxidizing bacteria and shortens the starting time. The culture of anaerobic ammonium oxidation granular sludge is generally dependent on the inoculation sludge and the quality of the incoming water. In the aspect of sludge inoculation, researches show that the starting speed of an anaerobic ammonia oxidation process can be accelerated by adding a small amount of aerobic granular sludge into seed sludge, but in practical application, the material cost for purchasing the aerobic granular seed sludge needs to be considered, and in addition, anaerobic ammonia oxidation bacteria require that the mass concentration ratio of substrate ammonia nitrogen (NH 4 + -N) to nitrite nitrogen (NO 2 - -N) is 1:1.32, so that aerobic granular sludge is cultivated into nitrosation granular sludge, and the anaerobic ammonia oxidizing bacteria strict water inlet condition is met. In terms of the quality of inflow water, water distribution is mostly adopted for culturing granular sludge in the past, but practical application is limited. It is therefore of great importance how to utilize municipal domestic sewage to effect the conversion of other types of readily available sludge into anammox granular sludge.
Disclosure of Invention
The invention provides a method for rapidly culturing anaerobic ammonia oxidation granular sludge by utilizing municipal domestic sewage, which comprises the steps of firstly promoting floc sludge to form aerobic granular sludge by improving aeration intensity and shortening sedimentation time, secondly forming nitrosation granular sludge by periodically discharging the floc sludge, and finally forming anaerobic ammonia oxidation granular sludge by prolonging anoxic time. Solves the problems of long anaerobic ammonia oxidation granular sludge culture time, high seed sludge cost and the like, directly utilizes urban sewage to culture, is economical and efficient, has no external pollution and is beneficial to the rapid formation of the anaerobic ammonia oxidation granular sludge.
The invention aims at solving the problems by the following technical scheme: a method for rapidly culturing anaerobic ammonia oxidation granular sludge by utilizing urban domestic sewage is characterized by comprising the following steps:
(1) Taking traditional activated sludge as inoculated sludge in a sequencing batch reactor, wherein the sludge concentration is 3000-5000mg/L, the quality of inlet water is urban domestic sewage, and the temperature and the pH are not controlled; the operation is carried out for four cycles each day, wherein the operation comprises water inflow for 10-20min, anaerobic stirring for 30-90min, aerobic stirring for 60-210min, sedimentation for 30-60min, water drainage and idle, and the water drainage ratio is 40-60%;
(2) And (3) an aerobic granular sludge culture stage: fully aerating in an aerobic stirring stage, controlling dissolved oxygen to be 2-10mg/L, shortening one-time precipitation time per 8-12 running period, shortening the time to be 0.5-2min until the precipitation time is as low as 2min, and considering that aerobic granular sludge is formed when the volume of sludge with the particle size of more than 200 mu m is more than 30% of the total volume of the sludge and the concentration of effluent ammonia nitrogen (NH 4 + -N) is more than 3 continuous days and less than 5 mg/L.
(3) Nitrosation granular sludge culture: shortening the time of an aerobic stirring stage to 30-90min, pouring granular sludge with the grain diameter of more than 200 mu m into a sequencing batch reactor through a 200 mu m screen after a drainage stage, wherein the sludge age of the flocculent sludge less than 200 mu m is 20-40 days, and maintaining the mass concentration ratio of effluent NH 4 + -N to nitrite nitrogen (NO 2 - -N) to 1.0-1.5 for more than 3 continuous days to form nitrosated granular sludge;
(4) Anaerobic ammoxidation granular sludge culture: and adding an anoxic stirring stage after the aerobic stirring stage for 60-240min, and prolonging the precipitation time for 30-60min, wherein when the mass concentration of the effluent NH 4 + -N and the NO 2 — N is more than 3 continuous days and less than 5mg/L, the ratio of the concentration reduction value of NH 4 + -N to the total nitrogen concentration reduction value in the anoxic stirring stage is considered to be that the anaerobic ammonia oxidation contribution ratio is more than 80%, and the anaerobic ammonia oxidation granular sludge is considered to be formed.
The invention has the following advantages:
(1) The invention provides a feasible method for culturing aerobic granular sludge by utilizing domestic sewage, which saves the acquisition cost of seed sludge;
(2) The invention provides a feasible method for converting aerobic granular sludge into nitrosation granular sludge, which solves the problem that domestic sewage lacks anaerobic ammoxidation substrates, and is simple to operate and easy to apply in practice;
(3) The invention provides a feasible conversion from nitrosation granular sludge to anaerobic ammonia oxidation granular sludge, shortens the starting time of the anaerobic ammonia oxidation process, has stronger treatment capacity, ensures that the contribution of anaerobic ammonia oxidation is up to 80 percent, and ensures that the total inorganic nitrogen in effluent can reach below 10 mg/L.
Drawings
FIG. 1 is a photomicrograph of the morphology of the sludge in a reactor employing the process of the present invention under a three stage operation.
FIG. 2 is a graph showing the ratio of total inorganic nitrogen to anaerobic ammonia oxidation contribution of water inlet and outlet of a reactor employing the method of the present invention under the condition that water inlet is domestic sewage.
FIG. 3 is a graph showing the trend of average particle diameter change of a reactor for forming anammox particles in the method of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the attached drawing figures and examples:
(1) Taking reflux sludge of a secondary sedimentation tank of a common municipal sewage treatment plant as inoculation sludge, and injecting the inoculation sludge into a sequencing batch reactor, wherein the concentration of the sludge is 4000mg/L;
(2) The urban sewage is taken as inflow water, the quality of the inflow water is shown in a table 1, each period of the sequencing batch reactor comprises 10 minutes of inflow water, 60 minutes of anaerobic stirring, 180 minutes of aerobic stirring, 30 minutes of precipitation, 60 minutes of drainage plus idling, the drainage ratio is 50%, 4 periods are operated every day, and the sequencing batch reactor is divided into three stages according to the adjustment of operation parameters, wherein the sludge form changes, the treatment performance and the average particle size change are respectively shown in fig. 1, fig. 2 and fig. 3.
(3) 0-60D is an aerobic granular sludge culture stage, dissolved oxygen is controlled to be 4-5mg/L, the sedimentation time is shortened once every 8 periods of operation, the sedimentation time is gradually shortened to 5min, under the condition, the mass concentration of NH 4 + -N of 60 days of effluent is less than 1mg/L, the average particle size of particles is 162.8 mu m, the percentage of the total sludge volume of the granular sludge reaches 31.5%, and the granular sludge enters a nitrosation granular sludge culture stage;
(4) 60-150d is a nitrosation granular sludge culture stage, the aerobic stirring time is shortened to 60min, and the flocculent sludge discharged in the daily precipitation stage is discharged after passing through a 200 mu m screen, the sludge age is 30 days, and after 90 days of operation, the mass concentration ratio of the effluent NO 2 - -N to the NH 4 + -N is maintained at 1.32 over 3 days continuously: 1, entering an anaerobic ammonia oxidation granular sludge culture stage;
(5) 150-220d is an anaerobic ammonia oxidation granular sludge culture stage, anoxic stirring is added after aerobic stirring for 180min, and the ratio of the NH 4 + -N mass concentration reduction value to the total nitrogen mass concentration reduction value in the anoxic stage after 70 days of operation is considered to be that the anaerobic ammonia oxidation contribution ratio is more than 80%, and the mass concentrations of effluent NH 4 + -N and NO 2 — N are more than 3 continuous days and less than 5mg/L.
TABLE 1
Claims (1)
1. A method for rapidly culturing anaerobic ammonia oxidation granular sludge by using urban domestic sewage is characterized by comprising the following steps:
(1) Inoculating sludge in a sequencing batch reactor, wherein the sludge concentration is 3000-5000mg/L, the quality of inlet water is urban domestic sewage, and the temperature and the pH are not controlled; the operation is carried out for four cycles each day, wherein the cycle comprises 10-20min of water inflow, 30-90 min of anaerobic stirring, 60-210 min of aerobic stirring, 30-60 min of sedimentation, water drainage and idling, and the water drainage ratio is 40-60%;
(2) And (3) an aerobic granular sludge culture stage: fully aerating in an aerobic stirring stage, controlling the dissolved oxygen to be 2-10 mg/L, shortening the sedimentation time once per 8-12 running period, shortening the sedimentation time to be 0.5-2min until the sedimentation time is as low as 2min, and considering that the aerobic granular sludge is formed when the volume of the sludge with the grain diameter of more than 200 mu m is more than 30% of the total volume of the sludge and the concentration of ammonia nitrogen NH 4 + -N in the effluent is more than 3 continuous days and less than 5 mg/L;
(3) Nitrosation granular sludge culture: shortening the time of an aerobic stirring stage to be 30-90 min, pouring granular sludge with the grain diameter of more than 200 mu m into a sequencing batch reactor through a 200 mu m screen after a drainage stage, wherein the sludge age of the flocculent sludge less than 200 mu m is 20-40 days, and maintaining the mass concentration ratio of effluent NH 4 + -N to nitrite nitrogen NO 2 - -N to be 1.0-1.5 when the mass concentration ratio is more than 3 days continuously, so that nitrosation granular sludge is considered to be formed;
(4) Anaerobic ammoxidation granular sludge culture: and adding an anoxic stirring stage after the aerobic stirring stage for 60-240min, and prolonging the precipitation time for 30-60 min, wherein when the mass concentration of the effluent NH 4 + -N and NO 2 - -N is more than 3 continuous days and less than 5 mg/L, the ratio of the concentration reduction value of NH 4 + -N to the total nitrogen concentration reduction value in the anoxic stirring stage is considered to be that the anaerobic ammonia oxidation contribution ratio is more than 80%, and the anaerobic ammonia oxidation granular sludge is considered to be formed.
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| CN202211408087.7A CN115784433B (en) | 2022-11-10 | 2022-11-10 | Method for rapidly culturing anaerobic ammonia oxidation granular sludge by using municipal domestic sewage |
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| CN115784433B true CN115784433B (en) | 2024-04-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043788A (en) * | 2013-01-04 | 2013-04-17 | 哈尔滨工业大学 | Cultivation method of anammox granular sludge |
| CN103601287A (en) * | 2013-11-17 | 2014-02-26 | 北京工业大学 | Culture method of aerobic nitrosification granule sludge |
| CN104529056A (en) * | 2014-11-29 | 2015-04-22 | 北京工业大学 | Method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge |
| CN112707505A (en) * | 2020-12-15 | 2021-04-27 | 北京工业大学 | Anaerobic ammonia oxidation reaction system based on granular sludge enhanced separation device and operation method |
| CN113072183A (en) * | 2021-04-08 | 2021-07-06 | 北京工业大学 | Method and device for realizing mainstream anaerobic ammonia oxidation in-situ enrichment through traditional activated sludge |
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- 2022-11-10 CN CN202211408087.7A patent/CN115784433B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043788A (en) * | 2013-01-04 | 2013-04-17 | 哈尔滨工业大学 | Cultivation method of anammox granular sludge |
| CN103601287A (en) * | 2013-11-17 | 2014-02-26 | 北京工业大学 | Culture method of aerobic nitrosification granule sludge |
| CN104529056A (en) * | 2014-11-29 | 2015-04-22 | 北京工业大学 | Method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge |
| CN112707505A (en) * | 2020-12-15 | 2021-04-27 | 北京工业大学 | Anaerobic ammonia oxidation reaction system based on granular sludge enhanced separation device and operation method |
| CN113072183A (en) * | 2021-04-08 | 2021-07-06 | 北京工业大学 | Method and device for realizing mainstream anaerobic ammonia oxidation in-situ enrichment through traditional activated sludge |
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