CN105502663A - Multifunctional biological nitrogen removal reactor - Google Patents
Multifunctional biological nitrogen removal reactor Download PDFInfo
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- CN105502663A CN105502663A CN201610088953.7A CN201610088953A CN105502663A CN 105502663 A CN105502663 A CN 105502663A CN 201610088953 A CN201610088953 A CN 201610088953A CN 105502663 A CN105502663 A CN 105502663A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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Abstract
Provided is a multifunctional biological nitrogen removal reactor. The reactor comprises a rectangular open tank (1), an aerobic zone and an anaerobic zone (13). According to the reactor, the rectangular open tank is partitioned into two zones, namely, the aerobic zone and the anaerobic zone through a partition plate (8); the two zones are communicated with each other through a first water outlet groove (9) and a communicating pipe (12); the aerobic zone is separated into an aeration zone (4) and a facultative zone (7) through an inclined plate (5), wherein a certain angle is formed between the inclined plate (5) and the vertical direction; the anaerobic zone is composed of water distributors (14) and a circulating pump (15). When the reactor is used for treating ammonia-nitrogen wastewater, the ammonia-nitrogen wastewater enters the aerobic zone for an aerobic reaction, then flows into the anaerobic reaction zone by itself for an anaerobic reaction and finally flows out of the reactor under the push of rising water flow, and the whole process is conducted by utilizing the potential and does not need power. The aerobic zone and the anaerobic zone are separately designed, so that growth of microorganisms is facilitated, and the nitrogen removal efficiency is improved; more dissolved oxygen is consumed with little aeration power, so that the energy saving purpose is achieved.
Description
Technical field
The present invention relates to a kind of multifunctional bio denitrification reactor, belong to technical field of sewage.
Background technology
Along with the development of society, the mankind improve gradually to environmental requirement, more strict to the emission standard of sewage, administer the technology of waste water at development.Ammonia nitrogen is one of main component of water pollutions, employing bio-denitrification technology is the important method of ammonia nitrogen in waste water treatment technology, the main biological denitrification process adopted has at present: the techniques such as complete nitrification and denitrification, short-cut nitrification and denitrification and partial nitrification Anammox, nitrifying process is main mainly with aerobic microbiological, need aerobic environment, denitrification and anaerobic ammonium oxidation process are main more than anaerobion, it is desirable that anaerobic environment.The more technology of current employing is A/O, SBR, MBR, UASB etc., these technology in actual use, aerobic microbiological and anaerobion all survive in same environment, aerobic environment, anaerobic environment, to microorganism, the in-and-out instability of environment, directly have influence on microbial growth and processing efficiency, this is the technical problem that we are badly in need of solving on biological denitrificaion process ammonia nitrogen waste water.
Summary of the invention
The object of the invention is, according to problem anxious to be resolved in existing biological denitrificaion process ammonia nitrogen waste water, the present invention proposes a kind of multifunctional bio denitrification reactor and working method.
Technical scheme of the present invention is, a kind of multifunctional bio denitrification reactor of the present invention comprises rectangle uncovered pond body, aerobic zone and anaerobic zone; Uncovered for rectangle pond body is divided into Liang Ge district by dividing plate by described biological denitrification reactor, i.e. aerobic zone and anaerobic zone; Twoth district are interconnected by the first effluent trough and communicating pipe; Aerobic zone is separated into aeration zone and aerobic area by swash plate; Anaerobic zone is made up of water distributor and recycle pump; Be connected with outside with rising pipe by water inlet pipe; Aeration zone is provided with aerator, and aerator adds air by outside and carries out aeration in aeration zone.
Described reactor, for the treatment of ammonia nitrogen in high ammonia-nitrogen wastewater, can realize short-cut nitrification-denitrification and partial nitrification-anaerobic ammonia oxidation process.
Described aerobic zone is nitrosation reaction district, by ammonia oxidation bacteria, ammonium oxidation is become nitrite nitrogen by aeration is aerobic; Described anaerobic zone is anti-nitrosation reaction district or Anammox reaction zone mainly.Nitrite nitrogen, mainly under the environment of anaerobism, by anti-nitrite bacteria, is reduced into nitrogen by anti-nitration reaction district.Anammox reaction zone, mainly under the environment of anaerobism, by anaerobic ammonia oxidizing bacteria, by ammonia-state nitrogen and nitrite nitrogen reaction, generates nitrogen.
The tilt angle alpha 1 of described dividing plate and horizontal plane is 20 ° ~ 50 °.
The tilt angle alpha 2 of described swash plate and vertical surface is 20 ° ~ 55 °; Distance L1 between the top of swash plate and wall of container is between 20mm ~ 500mm, and swash plate top is consistent with water surface elevation.
Keep the gap of 10mm to 100mm between described swash plate and described dividing plate, be convenient to the backflow of waste water and mud.
The level height of described first effluent trough is necessarily greater than the level height of rising pipe.
Described communicating pipe, one end was at the mouth of pipe of anaerobic zone end, and the other end is bottom anaerobic zone.
Described short-cut nitrification-denitrification processing condition are, aeration zone dissolved oxygen DO controls in the scope of 0.5mg/l ~ 2mg/l, aerobic area dissolved oxygen DO controls in the scope of about 0.5mg/l, pH controls between 6.5 ~ 7.5, it is main that the ammonia nitrogen guaranteeing in waste water mainly converts nitrite nitrogen to, while the circulation stirring of anaerobic zone, adds a certain amount of organic carbon source, controlled by BOD:TN at 2:1, the upflow velocity of anaerobic zone outlet controls within 0.5m/h.
Described partial nitrification-anaerobic ammonia oxidation process condition is, aeration zone DO controls at 0.5mg/L ~ 1.5mg/L, and by aerobic area DO Kong ≤0.3mg/L, aerobic zone pH controls in 6.5 ~ 8 scopes, to ensure that only having the ammonia of part to carry out nitrosation reaction forms nitrite nitrogen, will control NH
3-N:NO
2-N≤1; The upflow velocity of anaerobic zone outlet controls within 0.4m/h.
Multifunctional bio denitrification reactor principle of work of the present invention: high ammonia-nitrogen wastewater enters multifunctional bio denitrification reactor aerobic zone by water inlet pipe 2, in the effect of the aeration of aerator 3, waste water travels up to reactor head along with bubble promotes, because swash plate 5 is slant settings, the space structure that aeration zone is up-small and down-big, continuous extruding is subject at top to making G&W, create air lift effect, carbonated drink is made to break through the water surface, climb over swash plate 5 upper end and pour in aerobic area, due to aeration process carbonated drink being gushed, form negative pressure in the bottom of aeration zone.In aerobic area, after the water of aeration zone climbs over swash plate 5, form advection, the stop being subject to again baffle plate 6 when advection forces water dirty along swash plate 5, under most of water is subject to the suction function bottom aeration zone, walks around swash plate 5 bottom and is back to aeration zone, realize aeration cycle; The water of small part, under waterpower pushing effect, walks around baffle plate 6, then the water carrying out slowly upwards advection to the first effluent trough 9, first effluent trough 9 enters communicating pipe 12 at the flows by action of waterhead, and the waste water now through aerobic treatment enters anaerobic zone; And the sedimentation under gravity of the aerobic sludge of aerobic zone, along dividing plate 8 oblique flow to aeration zone, circulated by aeration.Waste water is by flowing into communicating pipe 12 bottom anaerobic reaction district, mix with highdensity anaerobic sludge, pump into water distributor 14 by recycle pump 15 again and carry out mass transfer stirring, anaerobe is made to react more abundant, reacted waste water slowly upwards flows, enter the second effluent trough 10, then flow out bio-reactor by rising pipe 11; And anaerobic sludge is subject to action of gravity, be back to anaerobic reaction district, thus ensure to run off in anaerobic sludge portion, reactor sludge quantity is on the increase, and processing power constantly strengthens.
The invention has the beneficial effects as follows, a kind of multifunctional bio denitrification reactor of the present invention is when processing ammonia nitrogen waste water, and the multidomain treat-ment of aerobic zone and anaerobic zone, makes the living environment that aerobic bacteria and anerobe have it to adapt.Ammonia nitrogen waste water is introduced into aerobic zone and carries out aerobic reaction, then inflow anaerobic reaction district carries out anaerobic reaction voluntarily, and outflow reactor under the promotion of ascending current subsequently, whole process because of gesture is, without the need to power.Waste water stirs with mud mixing mass transfer in aeration zone, only the fruit by aeration effect.The up-small and down-big structure space in aeration zone not only has good circulation stirring function, and be squeezed at top because of air water, be easier to the transfer of oxygen, make to obtain more dissolved oxygen DO with little aeration power consumption, reach save energy, reduce the object of running cost.
Accompanying drawing explanation
Fig. 1 is multifunctional bio denitrification reactor structural representation of the present invention;
In figure, 1 is reactor cell body; 2 is water inlet pipes; 3 is aerators; 4 is aeration zones; 5 is swash plates; 6 is baffle plates; 7 is aerobic areas; 8 is dividing plates; 9 is first effluent troughs; 10 is second effluent troughs; 11 is rising pipes; 12 is communicating pipe; 13 is anaerobic zones; 14 is water distributors; 15 is recycle pumps.
Embodiment
The specific embodiment of the present invention as shown in Figure 1.
A kind of multifunctional bio denitrification reactor of the present embodiment comprises rectangle uncovered pond body 1, aerobic zone and anaerobic zone 13; Uncovered for rectangle pond body 1 is divided into Liang Ge district by dividing plate 8 by described biological denitrification reactor, i.e. aerobic zone and anaerobic zone 13; Twoth district are interconnected by the first effluent trough 9 and communicating pipe 12; Aerobic zone is separated into aeration zone 4 and aerobic area 7 by swash plate 5; Anaerobic zone 13 is made up of water distributor 14 and recycle pump 15; Be connected with outside with rising pipe 11 and communicating pipe 12 by water inlet pipe 2; Aeration zone 4 is provided with aerator 3, and aerator 3 adds air by outside and carries out aeration in aeration zone.
The working method of the present embodiment reactor is as follows:
(1) short-cut nitrification-denitrification technique
With short-cut nitrification-denitrification denitrification process, after high ammonia-nitrogen wastewater enters biological denitrification reactor in the mode of continuum micromeehanics, first carry out nitrosation reaction, this process need carries out the flow control into water, the control of dissolved oxygen and the control of pH, flooding quantity is controlled in certain scope, ensure that the nitrosification time is inexcessive, aeration zone dissolved oxygen DO is controlled in the scope of 0.5mg/l ~ 2mg/l, aerobic area dissolved oxygen DO controls in the scope of about 0.5mg/l, pH controls between 6.5 ~ 7.5, it is main that the ammonia nitrogen guaranteeing in waste water mainly converts nitrite nitrogen to,
Waste water enters anaerobic reaction district after aerobic zone completes nitrosification, carries out reduction reaction, nitrite nitrogen is reduced into nitrogen under the effect of denitrifying bacterium; In this process, because anti-nitrite bacteria growth needs carbon is as its nutritive substance, while the circulation stirring of anaerobic zone, adds a certain amount of organic carbon source, BOD:TN is controlled at 2:1; High ammonia-nitrogen wastewater is by short-cut nitrification-denitrification denitrification process, and its ammonia nitrogen removal frank is more than 85%.
The upflow velocity that flooding velocity exports with anaerobic zone decides, Kong ≤0.5m/h;
(2) partial nitrification-anaerobic ammonia oxidation process
High ammonia-nitrogen wastewater, in the mode of continuum micromeehanics, enters multifunctional bio denitrification reactor, is introduced into aerobic zone and carries out partial nitrification reaction.Because the ammonia in waste water partly can only carry out nitrosation reaction, and can not nitration reaction be carried out, therefore the concentration of the dissolved oxygen DO of aerobic zone must first be controlled, aeration zone DO is controlled at 0.5mg/L ~ 1.5mg/L, by aerobic area DO Kong ≤0.3mg/L, by controlling aeration rate, Reaction time shorten, to reduce the cycle index of waste water in aeration zone, aerobic zone pH controls 6.5 ~ 8 simultaneously; Scope, to ensure that only having the ammonia of part to carry out nitrosation reaction forms nitrite nitrogen, will control NH
3-N:NO
2-N≤1;
The anaerobic ammonia oxidizing bacteria of anaerobic zone is due to poor growth, the multiplication cycle is long, Anammox biological flora is easy to be subject to the dry of other bacteriums and scratches destruction, therefore, enter the partial nitrification waste water of anaerobic zone, the suspended substance as far as possible reduced containing other floras is needed to flow into anaerobic zone, and the aerobic area of the aerobic zone of multifunctional bio denitrification reactor have employed flat flow precipitation principle design, possesses the function retaining suspended substance, when the waste water of partial nitrification is flowing to effluent trough simultaneously, also at the precipitation Interception process carrying out the suspended substances such as aerobic microbiological; In aerobic zone, hydraulic load is controlled at 0.4m
3/ m
2within h, the waste water entering anaerobic zone carries out water distribution circulation stirring under the effect of recycle pump and water distributor, to make mass transfer effect better, guarantees that anaerobic ammonia oxidizing bacteria carries out digestion denitrification reaction better; High ammonia-nitrogen wastewater is by part nitrosation-anaerobic ammoxidation technique, and its ammonia nitrogen removal frank is more than 80%.
The upflow velocity that flooding velocity exports with anaerobic zone decides, and upwelling speed control system is within≤0.4m/h.
Claims (7)
1. a multifunctional bio denitrification reactor, is characterized in that, described reactor comprises rectangle uncovered pond body, aerobic zone and anaerobic zone; Uncovered for rectangle pond body is divided into Liang Ge district, i.e. aerobic zone and anaerobic zone by the dividing plate angled with horizontal plane by described reactor; Twoth district are interconnected by the first effluent trough and communicating pipe; Aerobic zone is separated into aeration zone and aerobic area by the swash plate angled with vertical direction; Anaerobic zone is made up of water distributor and recycle pump; Water inlet pipe is connected with outside with rising pipe and connection siphunculus; Aeration zone is provided with aerator, and aerator adds air by outside and carries out aeration in aeration zone; Described reactor, for the treatment of ammonia nitrogen in high ammonia-nitrogen wastewater, can realize short-cut nitrification-denitrification and partial nitrification-anaerobic ammonia oxidation process.
2. a kind of multifunctional bio denitrification reactor according to claim 1, is characterized in that, described dividing plate 8 is 20 ° ~ 50 ° with the angle of inclination (α 1) of horizontal plane.
3. a kind of multifunctional bio denitrification reactor according to claim 1, is characterized in that, described swash plate 5 is 20 ° ~ 55 ° with the angle of inclination (α 2) of vertical surface; Distance L1 between the top of swash plate and wall of container is between 20mm ~ 500mm, and swash plate top is consistent with water surface elevation.
4. a kind of multifunctional bio denitrification reactor according to claim 1, is characterized in that, keep the gap of 10mm to 100mm between described swash plate and described dividing plate, be convenient to the backflow of waste water and mud.
5. a kind of multifunctional bio denitrification reactor according to claim 1, it is characterized in that, the level height of described first effluent trough is necessarily greater than the level height of rising pipe.
6. a kind of multifunctional bio denitrification reactor according to claim 1, is characterized in that, described communicating pipe, one end was at the mouth of pipe of anaerobic zone end, and the other end is bottom anaerobic zone.
7. a kind of multifunctional bio denitrification reactor according to claim 1, it is characterized in that, the working method of described reactor comprises:
(1) short-cut nitrification-denitrification technique
With short-cut nitrification-denitrification denitrification process, after high ammonia-nitrogen wastewater enters biological denitrification reactor in the mode of continuum micromeehanics, first carry out nitrosation reaction, this process need carries out the flow control into water, the control of dissolved oxygen and the control of pH, flooding quantity is controlled in certain scope, ensure that the nitrosification time is inexcessive, aeration zone dissolved oxygen DO is controlled in the scope of 0.5mg/l ~ 2mg/l, aerobic area dissolved oxygen DO controls in the scope of about 0.5mg/l, pH controls between 6.5 ~ 7.5, it is main that the ammonia nitrogen guaranteeing in waste water mainly converts nitrite nitrogen to,
Waste water enters anaerobic reaction district after aerobic zone completes nitrosification, carries out reduction reaction, nitrite nitrogen is reduced into nitrogen under the effect of denitrifying bacterium; In this process, because anti-nitrite bacteria growth needs carbon is as its nutritive substance, while the circulation stirring of anaerobic zone, adds a certain amount of organic carbon source, BOD:TN is controlled at 2:1;
The upflow velocity that flooding velocity exports with anaerobic zone decides, Kong ≤0.5m/h;
(2) partial nitrification-anaerobic ammonia oxidation process
High ammonia-nitrogen wastewater, in the mode of continuum micromeehanics, enters multifunctional bio denitrification reactor, is introduced into aerobic zone and carries out partial nitrification reaction; Because the ammonia in waste water partly can only carry out nitrosation reaction, and can not nitration reaction be carried out, therefore the concentration of the dissolved oxygen DO of aerobic zone must first be controlled, aeration zone DO is controlled at 0.5mg/L ~ 1.5mg/L, by aerobic area DO Kong ≤0.3mg/L, by controlling aeration rate, Reaction time shorten, to reduce the cycle index of waste water in aeration zone, aerobic zone pH controls 6.5 ~ 8 simultaneously; Scope, to ensure that only having the ammonia of part to carry out nitrosation reaction forms nitrite nitrogen, will control NH
3-N:NO
2-N≤1;
The anaerobic ammonia oxidizing bacteria of anaerobic zone is due to poor growth, the multiplication cycle is long, Anammox biological flora is easy to be subject to the dry of other bacteriums and scratches destruction, therefore, enter the partial nitrification waste water of anaerobic zone, the suspended substance as far as possible reduced containing other floras is needed to flow into anaerobic zone, and the aerobic area of the aerobic zone of multifunctional bio denitrification reactor have employed flat flow precipitation principle design, possesses the function retaining suspended substance, when the waste water of partial nitrification is flowing to effluent trough simultaneously, also at the precipitation Interception process carrying out the suspended substances such as aerobic microbiological; In aerobic zone, hydraulic load is controlled at 0.4m
3/ m
2within h, the waste water entering anaerobic zone carries out water distribution circulation stirring under the effect of recycle pump and water distributor, to make mass transfer effect better, guarantees that anaerobic ammonia oxidizing bacteria carries out digestion denitrification reaction better; The upflow velocity that flooding velocity exports with anaerobic zone decides, and upwelling speed control system is within≤0.4m/h.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298690A (en) * | 2018-05-04 | 2018-07-20 | 中国海洋大学 | Integral part nitrosation-anaerobic ammoxidation inclined plate enhanced biological reactor |
| CN110713256A (en) * | 2019-10-14 | 2020-01-21 | 上海理工大学 | Biological pipe culvert reaction unit |
| CN113562841A (en) * | 2021-06-10 | 2021-10-29 | 科盛环保科技股份有限公司 | Efficient short-cut nitrification urban sewage deep denitrification device and method |
| CN113860494A (en) * | 2021-08-24 | 2021-12-31 | 江苏海洋大学 | Integrated wastewater denitrification process based on synchronous nitrification and denitrification |
| CN114538617A (en) * | 2022-03-17 | 2022-05-27 | 湘潭大学 | Full-automatic treatment device for deep denitrification of sewage/wastewater |
| CN115385448A (en) * | 2022-06-30 | 2022-11-25 | 光大环境科技（中国）有限公司 | Integrated device and method for treating high-ammonia-nitrogen wastewater through anaerobic ammonia oxidation |
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| CN108793398B (en) * | 2018-06-08 | 2021-06-25 | 北京工业大学 | Method and device for deep denitrification by coupling short-cut denitrification with anaerobic ammonia oxidation by taking sludge fermentation mixture as carbon source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110713256A (en) * | 2019-10-14 | 2020-01-21 | 上海理工大学 | Biological pipe culvert reaction unit |
| CN113562841A (en) * | 2021-06-10 | 2021-10-29 | 科盛环保科技股份有限公司 | Efficient short-cut nitrification urban sewage deep denitrification device and method |
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| CN114538617B (en) * | 2022-03-17 | 2024-01-23 | 湘潭大学 | Full-automatic treatment device for deep denitrification of sewage/wastewater |
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| CN115385448B (en) * | 2022-06-30 | 2023-11-21 | 光大环境科技（中国）有限公司 | Device and method for treating high ammonia nitrogen wastewater through integrated anaerobic ammonia oxidation |
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