CN116605988A - Quick starting method of integrated aerobic granular sludge-membrane bioreactor - Google Patents
Quick starting method of integrated aerobic granular sludge-membrane bioreactor Download PDFInfo
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- CN116605988A CN116605988A CN202310362393.XA CN202310362393A CN116605988A CN 116605988 A CN116605988 A CN 116605988A CN 202310362393 A CN202310362393 A CN 202310362393A CN 116605988 A CN116605988 A CN 116605988A
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- 239000012528 membrane Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000010802 sludge Substances 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 230000014759 maintenance of location Effects 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 238000011081 inoculation Methods 0.000 claims abstract description 4
- 239000010865 sewage Substances 0.000 claims description 22
- 239000003344 environmental pollutant Substances 0.000 claims description 9
- 231100000719 pollutant Toxicity 0.000 claims description 9
- 238000001556 precipitation Methods 0.000 claims description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 239000002028 Biomass Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000035764 nutrition Effects 0.000 claims description 3
- 235000016709 nutrition Nutrition 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 239000002957 persistent organic pollutant Substances 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005273 aeration Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a rapid starting method of an integrated aerobic granular sludge-membrane bioreactor, which is characterized in that in the integrated aerobic granular sludge-membrane bioreactor, the initial inoculation sludge concentration MLSS is 1500-3000mg/L, and high-quality water production is realized by comprehensively adjusting system parameters such as hydraulic retention time, sludge retention time, aeration quantity and the like, maintaining good carbon and nitrogen load, realizing rapid starting of the integrated aerobic granular sludge-membrane bioreactor, and improving the synchronous denitrification and dephosphorization effects of a system.
Description
Technical Field
The invention relates to the technical field of sewage (waste) biological treatment, in particular to a rapid starting method of an integrated aerobic granular sludge-membrane bioreactor.
Background
A Membrane Bioreactor (MBR) is a novel wastewater treatment system with a Membrane separation technology and an activated sludge treatment technology organically combined. The membrane component is used for replacing a traditional biological treatment technology end secondary sedimentation tank, high activated sludge concentration is kept in a biological reactor, and biological treatment organic load is improved, so that the occupied area of sewage treatment facilities is reduced, and the residual sludge amount is reduced by keeping low sludge load. Mainly uses membrane separation equipment to intercept activated sludge and macromolecular organic matters in water. The concentration of activated sludge (MLSS) in the membrane bioreactor system can be increased to 8000-12000mg/L or even higher, and the sludge age (SRT) can be prolonged to more than 30 days.
Sewage treatment and reuse are effective measures for developing and utilizing unconventional water resources. After the urban sewage and the industrial sewage are treated, the urban sewage and the industrial sewage are used for non-drinking purposes such as greening, flushing, landscape water body, ecological water supplementing and the like, and the clean water is used for the purposes of high water quality requirements such as drinking and the like, so that the water diversion amount from the natural environment can be reduced. Industrial and urban domestic sewage is available nearby, stable in source, capable of avoiding long-distance water delivery, realizing the near treatment to fully utilize water resources, and meanwhile, the sewage can be prevented from leaking in the long-distance delivery process to pollute underground water sources after the near treatment, and the sewage recycling is widely adopted in many areas of the world where water is lacking, so that the sewage recycling is an important way for realizing sustainable utilization of water resources.
Aerobic Granular Sludge (AGS) is a granular activated sludge formed by self-agglomeration of microorganisms under aerobic conditions, which has many unique advantages such as regular shape, compact structure, good sedimentation performance, high organic load and toxicity tolerance, has an aerobic and anaerobic coupling structure, and can realize synchronous denitrification and dephosphorization effects. After the aerobic granular sludge is first cultured in the upflow sludge bed reactor from Mishima and Nakamura in 1991, the culture and application cases of the aerobic granular sludge are continuously reported.
At present, most of aerobic granular sludge is cultivated in a Sequencing Batch Reactor (SBR), and the reactor has good granulating capability, but the granulating process is slower, the stability of granules is still to be improved, and the wide application of the aerobic granular sludge technology is limited. The sequencing batch activated sludge reactor is provided with a method for adding a carrier or improving hydraulic conditions to optimize the process, so that the forming time of the aerobic granular sludge is shortened, and meanwhile, the stability of the obtained aerobic granular sludge is improved. The integrated membrane bioreactor is a method combining an activated sludge process with membrane filtration, and can efficiently remove all suspended solids and even macromolecular soluble organic matters in sewage, but also causes membrane pollution. The method has the advantages that the hydraulics state in the reactor is regulated, the flocculent activated sludge in the membrane bioreactor can be converted into particles under the influence of the proper dissolved oxygen concentration, feeding mode and other conditions, the biomass is improved, various states such as aerobic, anoxic, anaerobic and the like can be coupled in a tiny area, the mass transfer distance is reduced, the synchronous removal of organic matters, nitrogen, phosphorus and other substances can be realized in a single reactor, and the membrane pollution can be obviously slowed down, so that the sewage treatment efficiency and the effluent quality are improved. The method is an integrated aerobic granular sludge-membrane bioreactor excitation technology, and the key of engineering application is to accelerate the rapid granulation of the activated sludge in the integrated membrane bioreactor, namely the rapid start of the integrated reactor is realized. The method has very important significance for popularizing the application of the technology and realizing the resource utilization of the unconventional water source.
Disclosure of Invention
The invention aims to provide a rapid starting method of an integrated aerobic granular sludge-membrane bioreactor, which aims to solve the problems in the prior art, conventional activated sludge is added into the integrated membrane bioreactor to serve as seed sludge, reasonable feeding modes are set, dissolved oxygen concentrations in different areas are regulated and controlled, the cultivation of the aerobic granular sludge is accelerated, and granular sludge with smooth surface, regular shape and compact texture is formed, so that the rapid starting of the integrated aerobic granular sludge-membrane bioreactor is realized.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the fast starting method of the integrated aerobic granular sludge-membrane bioreactor comprises the following steps:
step 1: rural/urban sewage (waste) is taken as inflow water quality, and the inflow water quality enters an aerobic granular sludge-membrane bioreactor to form initial inoculation sludge;
step 2: adjusting parameters of the integrated aerobic granular sludge-membrane bioreactor to maintain balanced operation of the system, wherein the balanced operation of the system is divided into a first stage, a second stage and a third stage:
the first stage is carried out under anaerobic/aerobic conditions, and the sludge in the system is activated, so that the system has the performance of efficiently removing organic pollutants;
the second stage is performed by adopting an anaerobic/precipitation drainage/anoxic/precipitation drainage mode, precipitation is performed after the anaerobic phosphorus release is finished, water is filtered out through a curtain membrane, and then sewage is introduced to provide a nutrition environment for an aerobic granular sludge-membrane bioreactor system;
the third stage adopts an anaerobic/anoxic alternative operation mode, and mainly aims at examining the operation stability of the reactor equipment;
step 3: the hydraulic retention time is shortened, the carbon and nitrogen load of the inlet water of the aerobic granular sludge-membrane bioreactor system is improved, the aerobic granular sludge and the flocculent sludge coexist, the aerobic granular sludge-membrane bioreactor system synchronously removes main pollutants, the high-efficiency synchronous denitrification and dephosphorization and organic matter removal are realized, and the pollutant removal efficiency is more than 80%.
The quality of the inflow water is in an anaerobic zone of an aerobic granular sludge-membrane bioreactor system, a membrane component of the membrane bioreactor is arranged in the aerobic zone, the inflow water is pumped out at the terminal end of the membrane component of the membrane bioreactor, and the active biomass between the aerobic zone and the anaerobic zone realizes the material exchange through the hydraulic condition of circulation.
The initial activated sludge concentration MLSS of the starting integrated aerobic granular sludge-membrane bioreactor is controlled at 1500-3500mg/L.
The first stage is characterized in that the sludge concentration is controlled to be 3200-3500mg/L, and the operation time is 3-4 days.
The sludge concentration of the second stage is controlled to be 4000-15000mg/L, and the sludge is operated for 18-20 days.
The pollutants are one or more of COD, ammonia nitrogen, total nitrogen and total phosphorus, and the specific time of the cultured aerobic granular sludge is 21 days.
The aerobic DO regulation concentration is 1.5-3.2mg/L, the anaerobic DO regulation concentration is 0-0.2mg/L, and the initial concentration of the mixed liquor suspended solid concentration (MLSS) is 2000-3500mg/L.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention adopts the rapid starting method of the integrated aerobic granular sludge-membrane bioreactor to prepare the aerobic granular sludge, the integrated aerobic granular sludge-membrane bioreactor has simple structure, simple and convenient operation, simple culture conditions, and can form particles with smooth surfaces, regular shapes and compact textures after short-time culture, thereby effectively reducing the culture time of the aerobic granular sludge.
(2) According to the invention, the aerobic granular sludge is cultured by using the integrated aerobic granular sludge-membrane bioreactor, so that the aerobic granular sludge with regular morphology, good sedimentation performance and maturity can be formed in the reactor within 20-30 days, MLSS (multi-stage sludge separation) is rapidly increased from 2500mg/L to about 11500mg/L, and the starting time of the granular sludge is effectively shortened.
Drawings
FIG. 1 is a flow chart of the startup of the integrated aerobic granular sludge-membrane bioreactor of the present invention.
FIG. 2 is a graph showing the morphology of aerobic granular sludge prepared by the integrated aerobic granular sludge-membrane bioreactor of the invention on days 7, 21, 25 and 40.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the drawings.
Example 1 conventional municipal sewage (COD of incoming water is 150-300 mg/L):
the fast starting method of the integrated aerobic granular sludge-membrane bioreactor comprises the following steps:
step 1: rural/urban sewage (waste) is taken as inflow water quality, and the inflow water quality enters an aerobic granular sludge-membrane bioreactor to form initial inoculation sludge;
step 2: adjusting parameters of the integrated aerobic granular sludge-membrane bioreactor to maintain balanced operation of the system, wherein the balanced operation of the system is divided into a first stage, a second stage and a third stage:
the first stage is carried out under anaerobic/aerobic conditions, and the sludge in the system is activated, so that the system has the performance of efficiently removing organic pollutants;
the second stage is performed by adopting an anaerobic/precipitation drainage/anoxic/precipitation drainage mode, precipitation is performed after the anaerobic phosphorus release is finished, water is filtered out through a curtain membrane, and then sewage is introduced to provide a nutrition environment for an aerobic granular sludge-membrane bioreactor system;
the third stage adopts an anaerobic/anoxic alternative operation mode, and mainly aims at examining the operation stability of the reactor equipment;
step 3: the hydraulic retention time is shortened, the carbon and nitrogen load of the inlet water of the aerobic granular sludge-membrane bioreactor system is improved, the aerobic granular sludge and the flocculent sludge coexist, the aerobic granular sludge-membrane bioreactor system synchronously removes main pollutants, the high-efficiency synchronous denitrification and dephosphorization and organic matter removal are realized, and the pollutant removal efficiency is more than 80%.
The quality of the inflow water is in an anaerobic zone of an aerobic granular sludge-membrane bioreactor system, a membrane component of the membrane bioreactor is arranged in the aerobic zone, the inflow water is pumped out at the terminal end of the membrane component of the membrane bioreactor, and the active biomass between the aerobic zone and the anaerobic zone realizes the material exchange through the hydraulic condition of circulation.
The initial activated sludge concentration MLSS of the starting integrated aerobic granular sludge-membrane bioreactor is controlled to be 2000-3500mg/L.
The first stage is characterized in that the sludge concentration is controlled to be 3200-3500mg/L, and the operation time is 3-4 days.
The sludge concentration of the second stage is controlled to be 4000-15000mg/L, and the sludge is operated for 18-20 days.
The pollutants are one or more of COD, ammonia nitrogen, total nitrogen and total phosphorus, and the specific time of the cultured aerobic granular sludge is 21 days.
The aerobic DO regulation concentration is 2.0-3.0mg/L, the anaerobic DO regulation concentration is 0-0.1mg/L, and the initial concentration of the mixed liquor suspended solid concentration (MLSS) is 2000-2500 mg/L.
Example 2: sewage with low carbon-nitrogen ratio (carbon-nitrogen ratio is less than 10)
The DO of the aerobic zone is regulated to be 1.5-3.2mg/L, the DO of the anaerobic zone is regulated to be 0-0.2mg/L, and the initial concentration of suspended solids (MLSS) of the mixed solution is regulated to be 2500-3500 mg/L. The method is started according to the flow shown in fig. 1, the aerobic granular sludge is cultivated on the 20 th day, the removal rate of main pollutants in sewage reaches more than 90%, and the starting of the integrated aerobic granular sludge-membrane bioreactor is completed.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions are considered to be within the scope of the present invention.
Claims (7)
1. The rapid starting method of the integrated aerobic granular sludge-membrane bioreactor is characterized by comprising the following steps of:
step 1: rural/urban sewage (waste) is taken as inflow water quality, and the inflow water quality enters an aerobic granular sludge-membrane bioreactor to form initial inoculation sludge;
step 2: adjusting parameters of the integrated aerobic granular sludge-membrane bioreactor to maintain balanced operation of the system, wherein the balanced operation of the system is divided into a first stage, a second stage and a third stage:
the first stage is carried out under anaerobic/aerobic conditions, and the sludge in the system is activated, so that the system has the performance of efficiently removing organic pollutants;
the second stage is performed by adopting an anaerobic/precipitation drainage/anoxic/precipitation drainage mode, precipitation is performed after the anaerobic phosphorus release is finished, water is filtered out through a curtain membrane, and then sewage is introduced to provide a nutrition environment for an aerobic granular sludge-membrane bioreactor system;
the third stage adopts an anaerobic/anoxic alternative operation mode, and mainly aims at examining the operation stability of the reactor equipment;
step 3: the hydraulic retention time is shortened, the carbon and nitrogen load of the inlet water of the aerobic granular sludge-membrane bioreactor system is improved, the aerobic granular sludge and the flocculent sludge coexist, the aerobic granular sludge-membrane bioreactor system synchronously removes main pollutants, the high-efficiency synchronous denitrification and dephosphorization and organic matter removal are realized, and the pollutant removal efficiency is more than 80%.
2. The method for quickly starting an integrated aerobic granular sludge-membrane bioreactor according to claim 1, wherein the quality of the inflow water is in an anaerobic zone of an aerobic granular sludge-membrane bioreactor system, a membrane component of the membrane bioreactor is arranged in an aerobic zone, the filtered water is pumped out at the terminal end of the membrane component of the membrane bioreactor, and the active biomass between the aerobic zone and the anaerobic zone realizes the material exchange through the hydraulic condition of circulation.
3. The rapid start-up method of an integrated aerobic granular sludge-membrane bioreactor according to claim 1, wherein the initial activated sludge concentration MLSS of the start-up integrated aerobic granular sludge-membrane bioreactor is controlled to be 1500-3500mg/L.
4. The method for quickly starting an integrated aerobic granular sludge-membrane bioreactor according to claim 1, wherein the first stage is controlled to have a sludge concentration of 3200-3500mg/L and a running period of 3-4 days.
5. The method for rapid start-up of an integrated aerobic granular sludge-membrane bioreactor according to claim 1, wherein the second stage sludge concentration is controlled to be 4000-15000mg/L for 18-20 days.
6. The method for rapid start-up of an integrated aerobic granular sludge-membrane bioreactor according to claim 1, wherein the contaminants are one or more of COD, ammonia nitrogen, total nitrogen and total phosphorus.
7. The method for rapid start-up of an integrated aerobic granular sludge-membrane bioreactor according to claim 1, wherein the aerobic DO regulation concentration is 1.5-3.2mg/L, the anaerobic DO regulation concentration is 0-0.2mg/L, and the mixed liquor suspended solids concentration (MLSS) initial concentration is 2000-3500mg/L.
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| CN101759289A (en) * | 2010-01-15 | 2010-06-30 | 杨国靖 | Method for culturing aerobic granular sludge for treating biological nutrients in municipal sewage |
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