CN106315853A - Oxidation ditch membrane bioreactor, wastewater treatment process and application thereof - Google Patents
Oxidation ditch membrane bioreactor, wastewater treatment process and application thereof Download PDFInfo
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- CN106315853A CN106315853A CN201610896006.0A CN201610896006A CN106315853A CN 106315853 A CN106315853 A CN 106315853A CN 201610896006 A CN201610896006 A CN 201610896006A CN 106315853 A CN106315853 A CN 106315853A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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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Abstract
The invention provides an oxidation ditch membrane bioreactor, a wastewater treatment process and an application thereof. An oxidation ditch is arranged in the oxidation ditch membrane bioreactor; the oxidation ditch membrane bioreactor comprises an anoxic zone and an aerobic zone which are continuously arranged or an anaerobic zone, the anoxic zone and the aerobic zone which are continuously arranged; one or more membrane bio-reaction zones are arranged in the aerobic zone; a sewage inlet is arranged in the anoxic zone or the anaerobic zone; the membrane bioreactor is organically combined with the oxidation ditch; the advantages of S-MBR and R-MBR are fully utilized; sludge backflow is reduced or cancelled; the technical process and the power equipment are simplified; as S-MBR running, the oxidation ditch membrane bioreactor can realize in-situ online cleaning and soaking cleaning; as R-MBR running, the oxidation ditch membrane bioreactor can increase the land use rate and simplify operation and maintenance; an aerating system is optimized; the pulse aeration is combined for guaranteeing the valid oxygen demand in each zone, so that energy consumption waste is avoided. According to the invention, through the optimal combination of the reactor, the processing effect of nitrogen and phosphorus removal can be enhanced, the energy consumption can be saved and the land occupation can be saved.
Description
Technical field
The present invention relates to biological treatment and the reuse technology technical field of biodegradability sewage, particularly relate to a kind of oxidation ditch
Membrane bioreactor and sewage treatment process thereof and application.
Background technology
Membrane bioreactor (membrane biological reactor) is applicable to town sewage and has biodegradability
Industrial Wastewater Treatment and reuse project, be a kind of that membrane separation technique is new with what traditional wastewater biological treatment organically combined
Type high-efficient sewage water treatment technology, substitutes conventional articulated gravity precipitation solid-liquid separation with film for separating medium and obtains water outlet, and can change anti-
Answer process and improve the sewage treatment process of reaction efficiency, being called for short MBR.
In MBR technique, microorganism concn is high, and device processing volume load is big, takes up an area and saves, and effluent quality is good, can directly return
With, last part technology is not required to arrange sedimentation tank, therefore, Chinese effluent standard require high, need reuse or engineering land used nervous
In project, there is significant advantage and vast potential for future development.
According to film group device position relative with bioreactor classify, MBR technique be divided into immersion (also known as integral type) and
External (also known as split type) film biological treatment system.Submerged membrane biological treatment system (Immersed membrane
Biological treatment system), it is called for short S-MBR, refers to that film group device is immersed in biological reaction pool, pollutant are being given birth to
Thing reaction tank carries out biochemical reaction, utilizes film to carry out equipment or the system of solid-liquid separation.Negative pressure can be used to produce water, it is possible to utilize quiet
Water pressure is from miscarrying water.External membrane biological treatment system (Sidestream membrane biological treatment
System), it is called for short R-MBR, refers to that film group device and biological reaction pool are arranged apart, the active sludge intermixture pump in biological reaction pool
Enter film group device and carry out equipment or the system of solid-liquid separation.Producing water discharge or advanced treating, the mud mixture of concentration is back to follow
Ring concentration basin or biological reaction pool, form circulation.
S-MBR process structure is tight, saves space, and treatment scale is less than 1000m3Situ cleaning can be used during/h, process
Scale is more than 1000m3Original biological treatment system can be destroyed because of situ cleaning, it is necessary to use off-line to clean during/h.Off-line cleans
Unit investment height, Operation and Maintenance is complicated.Simultaneously because film surface fluid stable, film blocking, membrane pollution problem become apparent from.
R-MBR technique film group device is independent, control mode is simple, easy to clean, but floor space is big, and energy consumption is high.
Along with the raising day by day of sewage drainage standard, town site is more becoming tight, and the application demand of MBR increases rapidly
Add, and hindering the main cause of MBR process operation and popularization is observable index traditional handicraft height and the relevant issues of fouling membrane.
At present, great majority research concentrates in the two problem.Wherein one of main direction of studying, be by by MBR technique and other
Technique organic assembling, optimizes operation maintenance mode, reduces energy consumption and operating cost.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of oxidation ditch membrane bioreactor and sewage thereof
Processing technique and application, set oxidation ditch in described oxidation ditch membrane bioreactor, described oxidation ditch membrane bioreactor includes even
Continue anoxic zone and the aerobic zone set up or include anaerobic zone, anoxic zone and the aerobic zone set up continuously, setting in described aerobic zone
Being equipped with one or more membrane biological reaction district, described sewage inlet is located at anoxic zone or anaerobic zone, by membrane bioreactor and
Oxidation ditch organically combines, and gives full play to the advantage of S-MBR and R-MBR, compared to traditional activated sludge process and tradition membrane bioreaction
Answer device: reduce or cancel sludge reflux, simplify technological process and power-equipment；Run as S-MBR, it is achieved the most online clear
Wash and soaking and washing；Running as R-MBR, improve land utilization ratio, Operation and Maintenance is simple；Optimize aerating system, in conjunction with arteries and veins
Rush aeration, it is ensured that effective oxygen demand in each region, it is to avoid waste energy consumption.The present invention optimum organization by reactor, strengthens
The treatment effect of biochemical system denitrogenation dephosphorizing, energy efficient, save and take up an area, reduce capital expenditure and operating cost.
The present invention is achieved by the following technical solutions:
First aspect present invention provides a kind of oxidation ditch membrane bioreactor, sets oxygen in described oxidation ditch membrane bioreactor
Changing ditch, described oxidation ditch membrane bioreactor includes the anoxic zone set up continuously and aerobic zone or includes the anaerobism set up continuously
District, anoxic zone and aerobic zone, be provided with one or more membrane biological reaction district in described aerobic zone, described sewage inlet is located at
Anoxic zone or anaerobic zone.
Preferably, described oxidation ditch is gallery type, and described oxidation ditch membrane bioreactor includes an oxidation ditch or multiple
The oxidation ditch of series connection.
It is highly preferred that described oxidation ditch is separated by training wall and formed, and include one or more gallery.
Even more preferably, described training wall includes midfeather and/or arc training wall.
Further it is highly preferred that described arc training wall is arranged at the free end of midfeather.
Preferably, between described anaerobic zone and anoxic zone, partition wall is set.
Preferably, any one or multinomial in following characteristics is also included:
1) described oxidation ditch membrane bioreactor is provided with one or more membrane biological reaction districts group, each membrane biological reaction district
Group is made up of the membrane biological reaction district of one or more parallel connections, when membrane biological reaction district group is multiple, and multiple membrane biological reactions
District's group is arranged in series in described aerobic zone；
2) each membrane biological reaction district arranges film district water distribution weir gate and film district effluent weir gate；
3) being provided with multiple deflector in each membrane biological reaction district, multiple deflectors are upper and lower in each membrane biological reaction district
It is crisscross arranged；
4) it is provided with membrane module in each membrane biological reaction district；
5) it is provided with push flowing diving mixer in described anaerobic zone, anoxic zone and aerobic zone；
6) described anoxic zone and aerobic zone are provided with aerator.
Second aspect present invention provides the purposes of above-mentioned oxidation ditch membrane bioreactor, is used for processing sewage.
Third aspect present invention provides a kind of oxidation ditch membrane bioreactor effluent treatment process, uses above-mentioned oxidation furrow membrane
Bioreactor carries out sewage disposal, arbitrary selected from following oxidation ditch membrane bioreactor effluent treatment process:
Oxidation ditch membrane bioreactor effluent treatment process one, comprises the following steps:
Sewage initially enters anoxic zone, mixes with the backflow from aerobic zone, carries out denitrification process and enter in anoxic zone
Row denitrogenation, partial organic substances is degraded removal under the effect of denitrifying bacterium；
Subsequently into aerobic zone and the membrane biological reaction district that is arranged in aerobic zone, carry out organic further degraded
And the nitrification of ammonia, enter back into anoxic zone at oxidation ditch internal circulation flow；Water after process is arranged by pump from membrane biological reaction district
Go out；
Oxidation ditch membrane bioreactor effluent treatment process two, comprises the following steps:
Sewage initially enters anaerobic zone, mixes with the backflow from aerobic zone, and in anaerobic zone, polyP bacteria is at anaerobic environment
Under release phosphorus, convert degradable organic pollution simultaneously, and part itrogenous organic substance carried out ammonification；
Subsequently into anoxic zone, mix with the backflow from aerobic zone, carry out denitrification process in anoxic zone and take off
Nitrogen, partial organic substances is degraded removal under the effect of denitrifying bacterium；
Subsequently into aerobic zone and the membrane biological reaction district that is arranged in aerobic zone, carry out organic further degraded
And the nitrification of ammonia and the absorption of phosphorus；Water after process is discharged by pump from membrane biological reaction district.
Preferably, any one or multinomial in following characteristics is also included:
The dissolved oxygen concentration ＜ 0.5mg/L of anoxic zone, hydraulic detention time is 0.5～3h, total nitrogen load rate≤
0.05kgTN/(kgMLSS·d)；
The dissolved oxygen concentration ＞ 2mg/L, BOD of aerobic zone5Sludge loading is 0.1～0.2kgBOD5/ (kgMLSS d), dirty
Mud concentration 2.5～4.5g/L；
Membrane biological reaction district is pulsed aeration on-line cleaning mode；
The gas-water ratio in membrane biological reaction district is 4～6:1, and intermission aeration gas-water ratio presses 12～16:1.
Preferably, the dissolved oxygen concentration of anaerobic zone is less than 0.2mg/L, and hydraulic detention time is 1～2h.
The oxidation ditch membrane bioreactor effluent treatment process of the present invention is for removing the Organic substance in sewage, and denitrogenation removes
Phosphorus, makes contributions for building a resource-conserving and environment-friendly society.Membrane biological reaction district is arranged in oxidation ditch by the present invention
In, use the mode run continuously, in conjunction with the pluses and minuses of S-MBR and R-MBR, give full play to different types of advantage.
With denitrogenation for mainly processing target, in oxidation ditch-MBR reactor, it is divided into anoxia/aerobic zone；With while denitrogenation dephosphorizing
For mainly processing target, it is divided into anaerobic/anoxic/aerobic zone.By the technological requirement of different workshop sections, it is stirred, aeration.Each work
Being connected with each other between Duan, pool-type structure and the Hydraulic Design realize being thoroughly mixed formula and pulling flow type, current in ensureing oxidation ditch simultaneously
Constantly circulate in whole cell body, instantaneous mixing.
Arranging training wall and submersible agitator in oxidation ditch, in promoting pond, levels vertically mixes, it is to avoid flow velocity is layered, profit
Velocity flow profile in improving pond, prevents sludgd deposition.
Aeration energy consumption is energy resource consumption link maximum in sewage treatment project and conventional treatment process, is also energy-conservation weight
Want link.By optimizing aerating system, reduce energy consumption: (1) automatic online controls, accurate aeration；(2) discontinuous aeration；(3)
Improvement pool-type structure, aerator.
Use blast aeration in oxidation ditch, select microporous aeration device, it is ensured that the amount of oxygen needed for technique.
MBR is arranged in oxidation ditch aerobic section, is controlled the Inlet and outlet water state of MBR by adjustable checkgate.Perforated pipe is used in pond,
By automatic programming control, carry out intermission aeration.Periodically tolerance change, low tolerance meets the oxygen amount needed for MBR technique,
Reduce invalid aeration；During high tolerance, air blast agitation forms cross-current on film surface, produces shearing force and perturbed force, makes biology
The macromole such as agglomerate depart from film surface, it is to avoid mud deposits on film group device.
MBR packet is arranged in parallel, according to process operation situation, routine cleaning.Compared with S-MBR, at various design scales
Under, all can use situ cleaning, not affect the operation of other group MBR unit, established biota and biology department will not be destroyed
System.Compared with R-MBR, decrease the plant equipment that purging system is supporting, reduce investment outlay and operating cost, it is simple to safeguard.
The oxidation ditch membrane bioreactor of the present invention and sewage treatment process thereof at least one of have the advantages that:
1) in oxidation ditch membrane bioreactor, current, in being thoroughly mixed and plug-flow pattern, constantly circulate, happen over and over again denitrogenation
Dephosphorization process, improves wastewater treatment efficiency；
2) oxidation ditch and MBR technique organically combine, it is possible to decrease return sludge ratio, or cancel sludge reflux, raw with conventional film
Thing reactor is compared, and technological process is brief, reduces mixed liquor elevator pump and lift line cost, and power consumption is low；
3) technical advantage of S-MBR and R-MBR is organically combined by oxidation ditch membrane bioreactor, saves land used, reduces machine
Electricity equipment, simple to operate and reduction energy consumption；
4) in the oxygen demand ensureing that reaction is normally carried out, on the premise of meeting again the tolerance needed for face is cleaned, film district adopts
With intermission aeration, reduce gas-water ratio, compare the mode of equivalent aeration, distribution according to need, it is to avoid energy consumption is superfluous, eliminates by tolerance simultaneously
Deficiency causes the problems such as film blocking；
5) membrane biological reaction district uses intermission aeration, by aeration control in most economical scope, effective aeration, it is to avoid
During being thoroughly mixed, affect the living environment of anoxic zone because dissolved oxygen is too high, suppress denitrification process；Or affect anaerobism
The living environment in district, suppresses dephosphorization process；
6) aerobic zone and the dissolved oxygen concentration of membrane biological reaction are controlled, while there is Nitrification, it is to avoid to Organic substance
Excessive degradation, make anoxic zone and anaerobic zone content of organics low, cause nitrate nitrogen not to be completely removed, suppression polyP bacteria
Release the synthesis of phosphorus and PHB, and the thorough degree of Phosphurus release has influence on the absorption of aerobic section phosphorus, thus affect denitrogenation dephosphorizing effect
Really；
7) membrane bioreactor and oxidation ditch are organically combined, give full play to the advantage of S-MBR and R-MBR, as S-MBR
Running, it is achieved on-line cleaning and soaking and washing in situ, reduce electromechanical equipment, maintenance operation is simple；Run as R-MBR, improve
Land utilization ratio, Operation and Maintenance is simple；
8) membrane biological reaction district is arranged in oxidation ditch, has the feature of S-MBR, saves space, easy to operate；
9) membrane biological reaction district uses intermission aeration, the aeration rate of design economical rationality, improves the effective rate of utilization of aeration,
Save energy consumption；
10) internal reflux mode is flexible, uses recycle stream waterpower plug-flow to realize, saves capital expenditure and operation energy consumption, pass through
Pool inner water stream iterative cycles, mud along with current, forms constantly circulation, it is achieved film district sludge reflux, anaerobic zone, anoxic zone mixed
Conjunction liquid refluxes；
11) the upper and lower interlaced arrangement in membrane biological reaction district deflector, forms the current that circle round up and down, weakens current and rush film silk
Brush intensity, is conducive to extending the service life of film silk, it is adaptable to various types of film silks.
Accompanying drawing explanation
Fig. 1 is the oxidation ditch membrane bioreactor plan structure schematic diagram of embodiment 1.
Fig. 2 is the oxidation ditch membrane bioreactor plan structure schematic diagram of embodiment 2.
Fig. 3 is the oxidation ditch membrane bioreactor plan structure schematic diagram of embodiment 3.
Accompanying drawing illustrates:
1-anoxic zone；2-aerobic zone；3-membrane biological reaction district；4-anaerobic zone；5-midfeather；6-arc training wall；7-
Partition wall；8-film district's water distribution weir gate；9-film district effluent weir gate；10-push flowing diving mixer.
Detailed description of the invention
Below by way of specific instantiation, technical scheme is described.Should be understood that the present invention mentions one or
Multiple method steps do not repel the step that there is also additive method step before and after described combination step or specifically mention at these
Additive method step can also be inserted between Zhou；Should also be understood that these embodiments are merely to illustrate the present invention rather than restriction
The scope of the present invention.And, except as otherwise noted, the numbering of various method steps is only the convenient tool differentiating various method steps,
Rather than for limiting the ordering of various method steps or limiting the enforceable scope of the present invention, the change of its relativeness or tune
Whole, in the case of without essence change technology contents, when being also considered as the enforceable category of the present invention.
When embodiment provides numerical range, it should be appreciated that unless the present invention is otherwise noted, two ends of each numerical range
Between point and two end points, any one numerical value all can be selected for.Unless otherwise defined, in the present invention use all technology and
The same meaning that scientific terminology and those skilled in the art of the present technique are generally understood that.Except in embodiment use concrete grammar, equipment,
Outside material, according to those skilled in the art's grasp to prior art and the record of the present invention, it is also possible to use and this
Any method, equipment and the material of the prior art that the method described in inventive embodiments, equipment, material are similar or equivalent comes real
The existing present invention.
Below in conjunction with accompanying drawing, the invention will be further described with being embodied as case.
Embodiment 1
Oxidation ditch membrane bioreactor
As it is shown in figure 1, set oxidation ditch in described oxidation ditch membrane bioreactor, described oxidation ditch membrane bioreactor includes
Anaerobic zone 4, anoxic zone 1 and the aerobic zone 2 set up continuously, is provided with four membrane biological reaction districts 3 in described aerobic zone 2, described
Sewage inlet is located at anaerobic zone 4.
Described oxidation ditch is gallery type, and described oxidation ditch membrane bioreactor includes two oxidation ditches connected.
Described oxidation ditch is separated by training wall and is formed, and includes multiple gallery.
Described training wall includes midfeather 5 and/or arc training wall 6.
Described arc training wall 6 is arranged at the free end of midfeather 5.
Between described anaerobic zone 4 and anoxic zone 1, partition wall 7 is set.
Described oxidation ditch membrane bioreactor is provided with Liang Ge membrane biological reaction district group, and each membrane biological reaction district group is by two
Membrane biological reaction district in parallel is constituted, and Liang Ge membrane biological reaction district group is arranged in series in described aerobic zone 2；Each membrane bioreaction
Answer district 3 that film district water distribution weir gate 8 and film district effluent weir gate 9 are set；Multiple deflector it is provided with in each membrane biological reaction district 3, multiple
Deflector is crisscross arranged in each membrane biological reaction district 3 up and down；It is provided with membrane module in each membrane biological reaction district 3.
Push flowing diving mixer 10 it is provided with in described anaerobic zone, anoxic zone and aerobic zone.
Described anoxic zone and aerobic zone are provided with aerator.
Oxidation ditch membrane bioreactor effluent treatment process
Use oxidation ditch membrane bioreactor as shown in Figure 1 to carry out sewage disposal, comprise the following steps:
Sewage initially enters anaerobic zone, mixes with the backflow from aerobic zone, and in anaerobic zone, polyP bacteria is at anaerobic environment
Under release phosphorus, convert degradable organic pollution simultaneously, and part itrogenous organic substance carried out ammonification, the dissolved oxygen of anaerobic zone is dense
Degree is ＜ 0.2mg/L, and corresponding ORP value is-300～-400mV, and hydraulic detention time is 1.5h；
Subsequently into anoxic zone, mix with the backflow from aerobic zone, carry out denitrification process in anoxic zone and take off
Nitrogen, partial organic substances degrades removal under the effect of denitrifying bacterium, and the dissolved oxygen concentration of anoxic zone is 0.5mg/L, hydraulic retention
Time is 3h, and total nitrogen load rate is 0.009kgTN/ (kgMLSS d), sludge concentration 4.5g/L；
Subsequently into aerobic zone and the membrane biological reaction district that is arranged in aerobic zone, carry out organic further degraded
And the nitrification of ammonia and the absorption of phosphorus, the dissolved oxygen concentration of aerobic zone is 2mg/L, BOD5Sludge loading is 0.032kgBOD5/
(kgMLSS d), sludge concentration is 4.5g/L, air blast micro-pore aeration, and air demand is 3.16m3Air/m3Sewage, membrane biological reaction
The dissolved oxygen concentration in district is 2mg/L, sludge concentration 10g/L, and membrane biological reaction district is pulsed aeration, uses reinforced hollow fine
Dimension film.(relevant parameter of film is with selected brand product qualitative change).
Sewage is back to anaerobic zone and anoxic zone respectively by circulation hydraulic plug-flow, it is not necessary to individually internal reflux device,
Can realize sewage constantly to circulate in pond, current are plug-flow pattern in whole reaction tank, again in being thoroughly mixed state, often
Individual position, instantaneous mixing, concentration of wastewater, sludge concentration are essentially identical.Membrane biological reaction district is arranged in aerobic zone, and water flows through film
Behind bio-reaction zone, final outflow water, water outlet can be by pumped.
The mixed liquor of aerobic zone is back to anoxic zone by the first mixed-liquor return passage, and the mixed liquor of aerobic zone is by the
Two mixed-liquor return passages are back to anaerobic zone.
Sewage effect after treatment is shown in Table 1.
| Water quality index (mg/L) | CODCr | BOD5 | SS | NH3-N | TN | TP |
| Influent quality | 400 | 150 | 100 | 35 | 50 | 5 |
| Effluent quality | 30 | 6 | 5 | 3 | 10 | 0.5 |
Embodiment 2
Oxidation ditch membrane bioreactor
As in figure 2 it is shown, set oxidation ditch in described oxidation ditch membrane bioreactor, described oxidation ditch membrane bioreactor includes
The anoxic zone 1 set up continuously and aerobic zone 2, be provided with four membrane biological reaction districts 3, described wastewater influent in described aerobic zone 2
Mouth is located at anoxic zone 1.
Described oxidation ditch is gallery type, and described oxidation ditch membrane bioreactor includes two oxidation ditches connected.
Described oxidation ditch is separated by training wall and is formed, and includes multiple gallery.
Described training wall includes midfeather 5 and/or arc training wall 6.
Described arc training wall 6 is arranged at the free end of midfeather 5.
Described oxidation ditch membrane bioreactor is provided with Liang Ge membrane biological reaction district group, and each membrane biological reaction district group is by two
Membrane biological reaction district in parallel is constituted, and Liang Ge membrane biological reaction district group is arranged in series in described aerobic zone 2；Each membrane bioreaction
Answer district 3 that film district water distribution weir gate 8 and film district effluent weir gate 9 are set；Multiple deflector it is provided with in each membrane biological reaction district 3, multiple
Deflector is crisscross arranged in each membrane biological reaction district 3 up and down；It is provided with membrane module in each membrane biological reaction district 3.
Push flowing diving mixer 10 it is provided with in described anoxic zone and aerobic zone.
Described anoxic zone and aerobic zone are provided with aerator.
Oxidation ditch membrane bioreactor effluent treatment process
Use oxidation ditch membrane bioreactor as shown in Figure 2 to carry out sewage disposal, comprise the following steps:
Sewage initially enters anoxic zone, mixes with the backflow from aerobic zone, carries out denitrification process and enter in anoxic zone
Row denitrogenation, partial organic substances degrades removal under the effect of denitrifying bacterium, and the dissolved oxygen concentration of anoxic zone is 0.5mg/L, waterpower
The time of staying is 2.5h, and total nitrogen load rate is 0.010kgTN/ (kgMLSS d), sludge concentration 4.5g/L；
Subsequently into aerobic zone and the membrane biological reaction district that is arranged in aerobic zone, carry out organic further degraded
And the nitrification of ammonia, the dissolved oxygen concentration of aerobic zone is 2mg/L, BOD5Sludge loading is 0.042kgBOD5/ (kgMLSS d),
Sludge concentration is 4.5g/L, air blast micro-pore aeration, and air demand is 3.35m3Air/m3Sewage, the dissolved oxygen in membrane biological reaction district is dense
Degree is 2mg/L, sludge concentration 10g/L, and membrane biological reaction district is pulsed aeration, uses Enhanced type hollow fiber film.(the phase of film
Related parameter is with selected brand product qualitative change).
Sewage is back to anaerobic zone and anoxic zone respectively by circulation hydraulic plug-flow, it is not necessary to individually internal reflux device,
Can realize sewage constantly to circulate in pond, current are plug-flow pattern in whole reaction tank, again in being thoroughly mixed state, often
Individual position, instantaneous mixing, concentration of wastewater, sludge concentration are essentially identical.Membrane biological reaction district is arranged in aerobic zone, and water flows through film
Behind bio-reaction zone, final outflow water.
Sewage effect after treatment is shown in Table 2.
| Water quality index (mg/L) | CODCr | BOD5 | SS | NH3-N | TN |
| Influent quality | 400 | 200 | 100 | 45 | 60 |
| Effluent quality | 50 | 10 | 10 | 5 | 15 |
Embodiment 3
Oxidation ditch membrane bioreactor
As it is shown on figure 3, set oxidation ditch in described oxidation ditch membrane bioreactor, described oxidation ditch membrane bioreactor includes
Anaerobic zone 4, anoxic zone 1 and the aerobic zone 2 set up continuously, is provided with four membrane biological reaction districts 3 in described aerobic zone 2, described
Sewage inlet is located at anaerobic zone 4.
Described oxidation ditch is gallery type, and described oxidation ditch membrane bioreactor includes three oxidation ditches connected.
Described oxidation ditch is separated by training wall and is formed, and includes multiple gallery.
Described training wall includes midfeather 5 and/or arc training wall 6.
Described arc training wall 6 is arranged at the free end of midfeather 5.
Between described anaerobic zone 4 and anoxic zone 1, partition wall 7 is set.
Described oxidation ditch membrane bioreactor is provided with Liang Ge membrane biological reaction district group, and each membrane biological reaction district group is by two
Membrane biological reaction district in parallel is constituted, and Liang Ge membrane biological reaction district group is arranged in series in described aerobic zone 2；Each membrane bioreaction
Answer district 3 that film district water distribution weir gate 8 and film district effluent weir gate 9 are set；Multiple deflector it is provided with in each membrane biological reaction district 3, multiple
Deflector is crisscross arranged in each membrane biological reaction district 3 up and down；It is provided with membrane module in each membrane biological reaction district 3.
Push flowing diving mixer 10 it is provided with in described anaerobic zone, anoxic zone and aerobic zone.
Described anoxic zone and aerobic zone are provided with aerator.
Oxidation ditch membrane bioreactor effluent treatment process
Use oxidation ditch membrane bioreactor as shown in Figure 3 to carry out sewage disposal, comprise the following steps:
Sewage initially enters anaerobic zone, mixes with the backflow from aerobic zone, and in anaerobic zone, polyP bacteria is at anaerobic environment
Under release phosphorus, convert degradable organic pollution simultaneously, and part itrogenous organic substance carried out ammonification, the dissolved oxygen of anaerobic zone is dense
Degree is ＜ 0.2mg/L, and corresponding ORP value is-300～-400mV, and hydraulic detention time is 1.5h；
Subsequently into anoxic zone, mix with the backflow from aerobic zone, carry out denitrification process in anoxic zone and take off
Nitrogen, partial organic substances degrades removal under the effect of denitrifying bacterium, and the dissolved oxygen concentration of anoxic zone is 0.5mg/L, hydraulic retention
Time is 2.5h, and total nitrogen load rate is 0.007kgTN/ (kgMLSS d), sludge concentration 4.5g/L；
Subsequently into aerobic zone and the membrane biological reaction district that is arranged in aerobic zone, carry out organic further degraded
And the nitrification of ammonia and the absorption of phosphorus, the dissolved oxygen concentration of aerobic zone is 2mg/L, BOD5Sludge loading is 0.042kgBOD5/
(kgMLSS d), sludge concentration is 4.5g/L, air blast micro-pore aeration, and air demand is 4.19m3Air/m3Sewage, membrane biological reaction
The dissolved oxygen concentration in district is 2mg/L, sludge concentration 10g/L, and membrane biological reaction district is pulsed aeration, uses reinforced hollow fine
Dimension film.(relevant parameter of film is with selected brand product qualitative change).
Sewage is back to anaerobic zone and anoxic zone respectively by circulation hydraulic plug-flow, it is not necessary to individually internal reflux device,
Can realize sewage constantly to circulate in pond, current are plug-flow pattern in whole reaction tank, again in being thoroughly mixed state, often
Individual position, instantaneous mixing, concentration of wastewater, sludge concentration are essentially identical.Membrane biological reaction district is arranged in aerobic zone, and water flows through film
Behind bio-reaction zone, final outflow water.
Sewage effect after treatment is shown in Table 3.
| Water quality index (mg/L) | CODCr | BOD5 | SS | NH3-N | TN | TP |
| Influent quality | 450 | 200 | 100 | 30 | 45 | 5 |
| Effluent quality | 50 | 10 | 10 | 5 | 15 | 0.5 |
The above-described presently preferred embodiments of the present invention that is only, not in order to limit the present invention, all the present invention's
Any amendment, equivalent and the improvement etc. made within spirit and principle, should be included within the scope of the present invention.
Claims (11)
1. an oxidation ditch membrane bioreactor, it is characterised in that set oxidation ditch in described oxidation ditch membrane bioreactor, described
Oxidation ditch membrane bioreactor includes the anoxic zone (1) set up continuously and aerobic zone (2) or includes the anaerobic zone set up continuously
(4), anoxic zone (1) and aerobic zone (2), be provided with one or more membrane biological reaction district (3) in described aerobic zone (2), described
Sewage inlet is located at anoxic zone (1) or anaerobic zone (4).
2. oxidation ditch membrane bioreactor as claimed in claim 1, it is characterised in that described oxidation ditch is gallery type, described
Oxidation ditch membrane bioreactor includes an oxidation ditch or the oxidation ditch of multiple series connection.
3. oxidation ditch membrane bioreactor as claimed in claim 2, it is characterised in that described oxidation ditch is to be separated by training wall
And formed, and include one or more gallery.
4. oxidation ditch membrane bioreactor as claimed in claim 3, it is characterised in that described training wall includes midfeather
And/or arc training wall (6) (5).
5. oxidation ditch membrane bioreactor as claimed in claim 4, it is characterised in that described arc training wall (6) is arranged at
The free end of midfeather (5).
6. oxidation ditch membrane bioreactor as claimed in claim 1, it is characterised in that described anaerobic zone (4) and anoxic zone (1)
Between partition wall (7) is set.
7. the oxidation ditch membrane bioreactor as described in any one of claim 1 to 6, it is characterised in that also include following characteristics
In any one or multinomial:
1) described oxidation ditch membrane bioreactor is provided with one or more membrane biological reaction districts group, each membrane biological reaction district group by
The membrane biological reaction district of one or more parallel connections is constituted, when membrane biological reaction district group is multiple, and multiple membrane biological reaction districts group
It is arranged in series in described aerobic zone (2)；
2) each membrane biological reaction district (3) arranges film district water distribution weir gate (8) and film district effluent weir gate (9)；
3) be provided with multiple deflector in each membrane biological reaction district (3), multiple deflectors in each membrane biological reaction district (3) on
Under be crisscross arranged；
4) it is provided with membrane module in each membrane biological reaction district (3)；
5) push flowing diving mixer (10) it is provided with in described anaerobic zone, anoxic zone and aerobic zone；
6) described anoxic zone and aerobic zone are provided with aerator.
8. the oxidation ditch membrane bioreactor as described in any one of claim 1 to 7 is for processing the purposes of sewage.
9. an oxidation ditch membrane bioreactor effluent treatment process, it is characterised in that use any one of claim 1 to 7 institute
The oxidation ditch membrane bioreactor stated carries out sewage disposal, appointing selected from following oxidation ditch membrane bioreactor effluent treatment process
One:
Oxidation ditch membrane bioreactor effluent treatment process one, comprises the following steps:
1) sewage initially enters anoxic zone, mixes with the backflow from aerobic zone, carries out denitrification process and carry out in anoxic zone
Denitrogenation, partial organic substances is degraded removal under the effect of denitrifying bacterium；
2) subsequently into aerobic zone and the membrane biological reaction district that is arranged in aerobic zone, carry out organic further degraded with
And the nitrification of ammonia, enter back into anoxic zone at oxidation ditch internal circulation flow；Water after process is discharged from membrane biological reaction district；
Oxidation ditch membrane bioreactor effluent treatment process two, comprises the following steps:
1) sewage initially enters anaerobic zone, mixes with the backflow from aerobic zone, and in anaerobic zone, polyP bacteria is under anaerobic environment
Release phosphorus, convert degradable organic pollution simultaneously, and part itrogenous organic substance is carried out ammonification；
2) subsequently into anoxic zone, mix with the backflow from aerobic zone, carry out denitrification process in anoxic zone and carry out denitrogenation,
Partial organic substances is degraded removal under the effect of denitrifying bacterium；
3) subsequently into aerobic zone and the membrane biological reaction district that is arranged in aerobic zone, carry out organic further degraded with
And the nitrification of ammonia and the absorption of phosphorus；Water after process is discharged from membrane biological reaction district.
10. oxidation ditch membrane bioreactor effluent treatment process as claimed in claim 9, it is characterised in that also include following
Any one or multinomial in feature:
1) the dissolved oxygen concentration ＜ 0.5mg/L of anoxic zone, hydraulic detention time is 0.5～3h, total nitrogen load rate≤0.05kgTN/
(kgMLSS·d)；
2) the dissolved oxygen concentration ＞ 2mg/L, BOD of aerobic zone5Sludge loading is 0.1～0.2kgBOD5/ (kgMLSS d), mud
Concentration 2.5～4.5g/L；
3) membrane biological reaction district is pulsed aeration on-line cleaning mode；
4) gas-water ratio in membrane biological reaction district is 4～6:1, and intermission aeration gas-water ratio presses 12～16:1.
11. oxidation ditch membrane bioreactor effluent treatment process as claimed in claim 10, it is characterised in that anaerobic zone molten
Solving oxygen concentration and be less than 0.2mg/L, hydraulic detention time is 1～2h.
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