CN103539257A - Membrane bioreactor domestic sewage treatment nitrosation quick start method - Google Patents

Membrane bioreactor domestic sewage treatment nitrosation quick start method Download PDF

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CN103539257A
CN103539257A CN201310477480.6A CN201310477480A CN103539257A CN 103539257 A CN103539257 A CN 103539257A CN 201310477480 A CN201310477480 A CN 201310477480A CN 103539257 A CN103539257 A CN 103539257A
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domestic sewage
stage
concentration
nitrosation
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CN103539257B (en
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李冬
张玉龙
张肖静
梁瑜海
何永平
张翠丹
吴青
门绚
周元正
杨胤
苏庆岭
范丹
姜沙沙
梁雨雯
路健
王朗
卫家驹
杨杰
张金库
曾辉平
张�杰
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Beijing University of Technology
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Beijing University of Technology
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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

Abstract

The invention relates to a membrane bioreactor domestic sewage treatment nitrosation stable operation method, and belongs to the field of city sewage treatment project. The method comprises the main steps that: city sewage plant reflux sludge is inoculated; with a high-ammonia-nitrogen-SBR limited-oxygen low-DO operations strategy, nitrosation sludge is acclimation is carried out; continuous flow operation is carried out; thorough a method for gradually reducing substrate concentration, ammonia nitrogen concentration is close to actual domestic sewage concentration; and domestic sewage is introduced according to different ratios; and the water is completely altered into domestic sewage. During a domestic sewage operation process, parameters such as dissolved oxygen and HRT are regulated, and ammonia nitrogen oxidation rate is controlled higher than 60%; effluent NO2<->-N/NH4<+>-N reaches 1.0-1.3, and stable operation is maintained. According to the invention, membrane bioreactor is combined with the nitrosation process, such that domestic sewage nitrosation stable operation is finally realized.

Description

The method that the nitrosification of a kind of Membrane Bioreactor for Wastewater Treatment sanitary sewage starts fast
Technical field
The present invention relates to a kind of practical bio-denitrifying sewage technology, adopt membrane bioreactor, the ratio that is oxidized to sub-nitrogen by controlling ammonia nitrogen in sewage, realizes partial nitrification, for Anammox (ANAMMOX) technique of city domestic sewage provides suitable water inlet to realize autotrophic denitrification.
Background technology
China is one of whole world country that water resources is the poorest per capita; particularly in recent decades, along with the quickening of urbanization, process of industrialization, more aggravated water resources crisis; brought serious disaster to people's productive life, and the pollution of nitrogen phosphorus more become the most important thing of sewage disposal.Present most of Sewage Plant still relies on traditional nitration denitrification to carry out denitrogenation, and the problem that it is faced with carbon source deficiency and denitrogenation and dephosphorization contention carbon source, causes water outlet N, P not up to standard.
ANAMMOX technology is current most economical bio-denitrifying sewage approach, and it is that microorganism be take ammonia nitrogen as electron donor under anaerobism or anoxia condition, and nitrite nitrogen is electron acceptor(EA), is translated into the process of nitrogen.Compare with traditional nitration denitrification denitrogenation, Anammox has that oxygen-consumption is low, working cost is low, without additional carbon, volumetric loading advantages of higher.No matter in economic, operation, or in decarburization effect, ANAMMOX technology all has higher using value and potentiality to be exploited.
And be the key that realizes the denitrogenation of ANAMMOX process stabilizing as the Short-Cut Nitrification Process of body technology before ANAMMOX technique.Nitrosification is under aerobic conditions, the process that is nitrite nitrogen by mineralized nitrogen by ammonia oxidation bacteria (AOB).By controlling run condition, realize water outlet NO 2 --N/NH 4 +-N is 1.32:1, for ANAMMOX technique provides into water.
Membrane bioreactor (Membrane Bioreactor, MBR) is emerging in recent years sewage-treating reactor, and it not only can make to keep higher biological concentration in reactor, has the ability of stronger anti impulsion load simultaneously, and good processed water quality.If MBR is combined with sanitary sewage nitrosification, by exploring its influence factor and realizing steady running, will provide technology and parameter support for whole process autotrophic denitrification.
Summary of the invention
The object of the invention is to adopt membrane bioreactor, by changing operating parameter, progressively realize the nitrosifying steady running of sanitary sewage, for ANAMMOX technique provides the water inlet of suitable proportion, simultaneously for China's Water Environmental Pollution Control and recovery provide theoretical and parameter guidance.
The present invention is under normal temperature (23 ℃～25 ℃) condition, first the mode with high ammonia nitrogen intermittent operation realizes the nitrosifying quick startup of normal temperature, transfer afterwards Continuous Flow operation to, adopt the method that progressively reduces matrix to make ammonia nitrogen concentration approach sanitary sewage, then progressively introduce in proportion sanitary sewage, by regulating the parameters such as HRT, aeration rate, realize normal temperature sanitary sewage MBR semi-hitrosation, concrete operation step is as follows:
The unloading phase of 1 high ammonia nitrogen SBR
The returned sluge of taking from municipal wastewater treatment plant is dropped in reactor assembly, and its MLSS is 10.7g/L, and MLVSS is 6.3g/L.Adopt the operation strategy of the low DO of high ammonia nitrogen SBR limit oxygen to tame nitrifying sludge, under normal temperature condition, move, influent ammonium concentration is 200 ± 10mg/L, and basicity 2000 ± 100mg/L(is with CaCO 3meter), pH is 7.8～8.0, DO≤0.5mg/L, sludge age 20d.Operating parameter is: water inlet 5min, and aeration 4.5h, precipitation 30min, draining 5min, changes water than 83.3%, moves 4 cycles every day, and this stage, sub-nitrogen accumulation rate constantly rose.For enrichment AOB bacterium better, suppress NOB bacterium, the sub-nitrogen accumulation rate of take surpass 90% and 15 cycles of steady running be end mark above.
2SBR turns the Continuous Flow operation phase
After high ammonia nitrogen SBR starts successfully, reactor changes Continuous Flow operation into.In this stage, the instruments such as online pH, DO are installed, the parameter in Real-Time Monitoring reactor in reactor.
3 fall the matrix stage
Reactor operation scheme changes into after Continuous Flow, progressively reduces substrate concn, is divided into three phases: the first stage, influent ammonium concentration is 200 ± 10mg/L, and basicity 2000 ± 100mg/L(is with CaCO 3meter), move 10 days; Subordinate phase, influent ammonium concentration is reduced to 150 ± 10mg/L, and basicity 1500 ± 100mg/L(is with CaCO 3meter), move 10 days; Phase III, influent ammonium concentration is reduced to 100 ± 10mg/L, and basicity 1000 ± 100mg/L(is with CaCO 3meter), move 10 days.In this stage, 20～25 ℃ of temperature, HRT is 4～5h, DO is 0.2～0.5mg/L;
4 sanitary sewages are introduced the stage
The introducing of sanitary sewage is also that minute three phases carries out, and because testing the ammonia nitrogen concentration of sanitary sewage used, is about 100mg/L, so during water distribution, ammonia nitrogen concentration is also decided to be 100mg/L.First stage, water distribution ammonia nitrogen concentration 100 ± 10mg/L, basicity 1000 ± 100mg/L(is with CaCO 3meter), introduce sanitary sewage simultaneously, and V join: V life=2:1, moves 10 days; Subordinate phase, water distribution is constant, V join: V life=1:2, moves 10 days; Phase III, all introduce sanitary sewage.In this stage, 20～25 ℃ of temperature, HRT is 4～5h, DO is 0.2～0.5mg/L;
The present invention compares with traditional cities sewage water denitrification handling method, has the following advantages:
1) the present invention combines membrane bioreactor with partial nitrification technique, having solved traditional activated sludge process is difficult for cultivating long mud microorganism in age, processes the problems such as load is low, and be finally applied in city domestic sewage, stable, technical process is short and processing efficiency is high, and the water inlet of suitable proportion can be provided for ANAMMOX technique.
2) the present invention adopts the method for the pre-domestication of the high ammonia nitrogen of SBR to nitrifying sludge, start fast nitrosification and there is higher activity, then transfer Continuous Flow to, and by falling matrix, introducing the steps such as sanitary sewage in proportion, clear thinking, easy and simple to handle, realized the fast and stable operation of normal temperature city domestic sewage partial nitrification.
Accompanying drawing explanation
Fig. 1 is film bioreactor device schematic diagram
The design sketch of three nitrogen and sub-nitrogen accumulation rate unloading phase that Fig. 2 being SBR
Fig. 3 is the design sketch of Continuous Flow operation phase three nitrogen and ratio thereof
Embodiment
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not limited to this.
Concrete operation step is as follows:
The returned sluge that experiment seed sludge is municipal wastewater treatment plant, initial nitrification is functional, and in the high ammonia nitrogen SBR domestication stage, ammonia nitrogen concentration adopts (NH 4) 2sO 4configuration, basicity adopts NaHCO 3configuration, influent ammonium concentration is 200 ± 10mg/L, basicity 2000 ± 100mg/L(is with CaCO 3meter), temperature is 23～25 ℃, and pH is that 7.8～8.0, DO is 0.2～0.5mg/L, and HRT is 4.5h, adopts timing device, moves 4 cycles every day.Within front 4 cycles, water outlet nitre nitrogen progressively rises, and is up to 68mg/L, and nitre nitrogen concentration reduces gradually afterwards; In the whole domestication stage, water outlet ammonia nitrogen concentration constantly reduces, and sub-nitrogen growing amount and sub-nitrogen accumulation rate constantly rise, and when the 22nd cycle, sub-nitrogen accumulation rate reaches 90%, in 18 cycles afterwards, is stabilized in more than 90% always, thinks that SBR nitrosification tentatively starts successfully.The whole domestication stage is moved 10 days altogether.
Reactor assembly is referring to Fig. 1, this reactor is complete mixing reactor, useful volume is 3L, built-in polyvinylidene difluoride (PVDF) (PVDF) hollow fiber film assembly, and aeration ring is installed in bottom, top adopts fluid level controller to keep liquid level constant, WTW on-line monitoring instrument is set in reactor, and Real-Time Monitoring parameters arranges agitator simultaneously, so that muddy water hybrid power to be provided, Inlet and outlet water adopts peristaltic pump to control.
Three nitrogen unloading phase that Fig. 2 being high ammonia nitrogen SBR and sub-nitrogen accumulation rate figure.
Transfer to after Continuous Flow, according to the parameter in domestication stage, HRT is tentatively decided to be 4.5h, and first ammonia nitrogen concentration is made as 200 ± 10mg/L, and basicity 2000 ± 100mg/L(is with CaCO 3meter), move 10 days, in this stage, along with the adaptation of mud to reactor, ammonia nitrogen removal frank constantly rises, later stage is stabilized in 50% left and right, and sub-nitrogen accumulation rate is stabilized in more than 91% always, and mean value is 94.63%, this phase temperature is 23～25 ℃, pH is that 7.8～8.0, DO is 0.05～0.15mg/L, and HRT is 4.3h; Reduce afterwards ammonia nitrogen concentration to 150 ± 10mg/L, basicity 1500 ± 100mg/L(is with CaCO 3meter), move 10 days, in this process, ammonia nitrogen removal frank obviously rises, and mean value is 62%, and sub-nitrogen accumulation rate is 93.27%, and temperature is 23～25 ℃, and pH is that 7.8～8.0, DO is 0.05～0.2mg/L, and HRT is 4.6h; Then ammonia nitrogen concentration is reduced to 100 ± 10mg/L, and basicity 1000 ± 100mg/L(is with CaCO 3meter), move equally 10 days, ammonia nitrogen removal frank continues to rise, average is 81.08%, because substrate concn reduces suddenly, at initial two days, water outlet nitre nitrogen concentration is higher, sub-nitrogen accumulation rate declines to some extent, and sub-nitrogen accumulation rate rises rapidly subsequently, and later stage sub-nitrogen accumulation rate average is 96.05%, this phase temperature is 23～25 ℃, pH is that 7.6～7.8, DO is 0.05～0.2mg/L, and HRT is 4.4h.
Water distribution ammonia nitrogen concentration is down to after 100mg/L, starts progressively to introduce sanitary sewage, and experimental water is usingd the teaching and administrative staff family members of Beijing University of Technology West sanitary sewage as former water, and raw water quality is: NH 4 +-N is 70-100mg/L, NO 2 --N<1.0mg/L, NO 3 --N<1.0mg/L, COD is 240-460mg/L, and total phosphorus is 5.0-8.5mg/L, and pH value is 7.0-8.0.
This process is divided into three phases.First stage, V join: V life=2:1, owing to having introduced COD, and aeration rate is constant, so ammonia nitrogen removal frank declines to some extent, but sub-nitrogen accumulation rate is substantially constant, average is 95.81%, and in this stage, temperature is 23～25 ℃, pH is that 7.6～7.9, DO is 0.05～0.3mg/L, and HRT is 4.4h, moves 10 days; Subordinate phase, V join: V life=1:2, in order to improve the clearance of COD, suitably increases HRT in experimentation, increase aeration rate simultaneously, this stage ammonia nitrogen removal frank constantly rises, and sub-nitrogen accumulation rate average is 95.98%, and temperature is 23～25 ℃, and pH is 7.5～7.9, DO is 0.1～0.45mg/L, and HRT is 5.5h, moves 10 days; Phase III, all introduce sanitary sewage, this phase temperature is 23～25 ℃, pH is 7.4～7.8, DO is 0.15～0.5mg/L, and HRT is 5.6h, in early stage, the clearance of COD and ammonia nitrogen is fluctuation to some extent all, and water outlet COD is below 50mg/L immediately, and later stage ammonia nitrogen removal frank is more than 60%.This stage running time is longer, maintains more than 95% water outlet NO with sub-nitrogen accumulation rate 2 --N/NH 4 +-N reaches 1.0～1.3, and keeps steady running more than 20 days, thinks that membrane bioreactor realized stable nitrosification.

Claims (1)

1. the method that the nitrosification of Membrane Bioreactor for Wastewater Treatment sanitary sewage starts fast, is characterized in that:
(1) sludge seeding: the returned sluge of municipal wastewater treatment plant is dropped in reactor, and sludge concentration is 10～12g/L;
(2) intermittently start: 20～25 ℃ of temperature, pH is that 7.8～8.0, DO is 0.2～0.5mg/L, and influent ammonium concentration is 200 ± 10mg/L, and basicity is with CaCO 3under the condition of meter 2000 ± 100mg/L, tame nitrifying sludge, when sub-nitrogen accumulation rate surpasses 90% and 15 cycles of steady running when above, think that nitrifying sludge realized preliminary nitrosification;
(3) turn Continuous Flow and fall the matrix stage: one, influent ammonium concentration 200 ± 10mg/L, basicity is with CaCO 3meter 2000 ± 100mg/L, moves 10 days; Two, influent ammonium concentration 150 ± 10mg/L, basicity is with CaCO 3meter 1500 ± 100mg/L, moves 10 days; Three, influent ammonium concentration is reduced to 100 ± 10mg/L, and basicity is with CaCO 3meter 1000 ± 100mg/L, moves 10 days; In this stage, 20～25 ℃ of temperature, HRT is 4～5h, DO is 0.2～0.5mg/L;
(4) sanitary sewage is introduced the stage: the first step, and water distribution ammonia nitrogen concentration 100 ± 10mg/L, basicity is with CaCO 3meter 1000 ± 100mg/L introduces sanitary sewage simultaneously, and V join: V life=2:1, moves 10 days; Second step, water distribution is constant, V join: V life=1:2, moves 10 days; The 3rd step, all introduces sanitary sewage, and this stage maintains more than 95% with sub-nitrogen accumulation rate, water outlet NO 2 --N/NH 4 +-N reaches 1.0～1.3, and while keeping steady running 20 days above, thinks and successfully start nitrosification; In this stage, 20～25 ℃ of temperature, HRT is 4～5h, is 0.2～0.5mg/L.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105384242A (en) * 2015-12-28 2016-03-09 郑州轻工业学院 Starting method of process for synchronously removing carbon, nitrogen and suspended matter in low carbon source wastewater through membrane bioreactor
CN105481087A (en) * 2016-01-07 2016-04-13 河南师范大学 Quick start method of shortcut nitrification system
CN105923794A (en) * 2016-06-28 2016-09-07 苏州科技大学 Method for accelerating start process of rapidly started anaerobic ammonia oxidation reactor
CN109553247A (en) * 2018-12-28 2019-04-02 中国人民大学 A method of Anammox is realized based on heterotrophic nitrification process
CN113003714A (en) * 2021-04-14 2021-06-22 郑州轻工业大学 Method for realizing rapid accumulation of nitrous oxides based on membrane separation circulating water inflow

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CN101343116A (en) * 2008-07-18 2009-01-14 北京工业大学 Quick start method for anaerobic ammonia oxidation bioreactor for urban sewage
CN101549903A (en) * 2009-05-18 2009-10-07 浙江大学 Rapid starting method for biological nitration
CN102642924A (en) * 2012-04-26 2012-08-22 北京工业大学 Method for quickly starting completely autotrophic nitrogen removal over nitrite process on sewage on conditions of constant temperature and low ammonia nitrogen
CN103224284A (en) * 2013-03-17 2013-07-31 北京工业大学 Rapid starting method of membrane bioreactor completely-autotrophic nitrogen removal technology

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101343116A (en) * 2008-07-18 2009-01-14 北京工业大学 Quick start method for anaerobic ammonia oxidation bioreactor for urban sewage
CN101549903A (en) * 2009-05-18 2009-10-07 浙江大学 Rapid starting method for biological nitration
CN102642924A (en) * 2012-04-26 2012-08-22 北京工业大学 Method for quickly starting completely autotrophic nitrogen removal over nitrite process on sewage on conditions of constant temperature and low ammonia nitrogen
CN103224284A (en) * 2013-03-17 2013-07-31 北京工业大学 Rapid starting method of membrane bioreactor completely-autotrophic nitrogen removal technology

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105384242A (en) * 2015-12-28 2016-03-09 郑州轻工业学院 Starting method of process for synchronously removing carbon, nitrogen and suspended matter in low carbon source wastewater through membrane bioreactor
CN105481087A (en) * 2016-01-07 2016-04-13 河南师范大学 Quick start method of shortcut nitrification system
CN105923794A (en) * 2016-06-28 2016-09-07 苏州科技大学 Method for accelerating start process of rapidly started anaerobic ammonia oxidation reactor
CN105923794B (en) * 2016-06-28 2019-10-11 苏州科技大学 A method of accelerating quick start anaerobic ammonia oxidation reactor start-up course
CN109553247A (en) * 2018-12-28 2019-04-02 中国人民大学 A method of Anammox is realized based on heterotrophic nitrification process
CN109553247B (en) * 2018-12-28 2021-08-31 中国人民大学 Method for realizing anaerobic ammonia oxidation based on heterotrophic nitrification process
CN113003714A (en) * 2021-04-14 2021-06-22 郑州轻工业大学 Method for realizing rapid accumulation of nitrous oxides based on membrane separation circulating water inflow
CN113003714B (en) * 2021-04-14 2022-12-09 郑州轻工业大学 Method for realizing rapid accumulation of nitrous based on membrane separation circulating inlet water

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