CN1490259A - Sewage treating method and apparatus by dynamic biologic membrane and activating mud - Google Patents
Sewage treating method and apparatus by dynamic biologic membrane and activating mud Download PDFInfo
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- CN1490259A CN1490259A CNA021308977A CN02130897A CN1490259A CN 1490259 A CN1490259 A CN 1490259A CN A021308977 A CNA021308977 A CN A021308977A CN 02130897 A CN02130897 A CN 02130897A CN 1490259 A CN1490259 A CN 1490259A
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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
A method and equipment for treating sewage by cooperation of dynamic biomembrane and active sludge feature that the suspended active sludge and the dynamic biomembrane are integrated in a single aerating container. Said suspended active sludge can play the role of eliminating the most of pollutents in sewage. Said dynamic biomembrane can play the role of both separating solid from liquid and eliminating the rest of pollutants. Its advantages are high effect and less generation of mud.
Description
The invention belongs to the technical field of biological process sewage treatment process, particularly use dynamic biological film and activated sludge process synergy enhanced sewage treatment effect technology and device.
Traditional artificial bio-membrane's method sewage treatment process can be divided into activated sludge process and biomembrance process two big classes (Zhang Zijie, Lin Rongchen, Jin Rulin, volume.The Zhang Zijie chief editor, the Gu Xiasheng trial.Drainage system.China Construction Industry Press, pp99, pp199).The former is as the common urban sewage treatment system of being made up of aeration tank, second pond etc., main utilization is present in active sludge and wads a quilt with cotton intravital microorganism to the pollutants in sewage biodegrade, and the flco of active sludge generally is suspended state in reactor (aeration tank); The latter such as biological filter, blodisc etc. mainly utilize microorganism in the membranaceous mud (microbial film) to the pollutants in sewage biodegrade, and microbial film is generally attached on filtrate or other carriers.The relative merits of these two class methods are mutually corresponding often.Although the development of biomembrance process sewage treatment process rapidly, novel process continues to bring out, and activated sludge process is still the treatment process of main flow.The main drawback of generally speaking traditional artificial bio-membrane's method sewage treatment process is that processing efficiency is not high enough, effluent quality difficulty good inadequately and operational management is big etc.In addition, along with the aggravation of municipal water crises problem, the target of sewage disposal has been not only qualified discharge, also wishes to satisfy the requirement of reuse.The water outlet of traditional biological method sewage treatment process all is difficult to satisfy the requirement of reuse usually.
The present invention is directed to the shortcoming of traditional biological method sewage treatment process, proposed the synergistic sewage treatment process of dynamic biological film and activated sludge process.Its principle is integrated activated sludge process and biomembrance process in same reactor, utilize the efficient degradation effect of the active sludge flco that suspends to remove most pollution substances, pass the dynamic biological film again through the mixed solution after the active sludge effect then and form final outflow water; In this process, the suspended solids in the mixed solution is that the sieving action of dynamic biological film is held back, and wherein pollution substance such as residual organic then is that microbial biochemical effect in the dynamic biological film absorbs and degraded, thereby improves the water quality of water outlet.Among the present invention, the dynamic biological film has the effect of two aspects.The one, finish solid-liquid separation.In traditional biological process sewage disposal, reacted muddy water mixed solution generally need carry out solid-liquid separation by gravity settling equipment such as second ponds, not only take up an area of big, investment height, and the effect of solid-liquid separation is subjected to the influence of several factors, inferior separating effect is when serious even can influence the works better of total system.The present invention has overcome the solid-liquid separation problem in the traditional method fully.Second of the dynamic biological film effect is that the biochemical action of the microorganism by is wherein further removed dissolubility pollutant matter among the present invention.In traditional biomembrance process sewage treatment process, the dissolubility pollutant in the water, dissolved oxygen etc. mainly enter microbial film by the diffusion mass transfer effect, so its efficient often is subjected to the restriction of diffusion mass transfer effect.In the method for the invention, mixed solution penetrates biomembranous motion, and mass transfer effect no longer becomes restrictive condition, thus the time improved biomembranous working efficiency.
Implementation method of the present invention is as follows:
1) sets up bio-reactor A.The bio-reactor of being set up comprises reactive tank A-I, guiding device A-II, aerating apparatus A-III, Inlet and outlet water device A-IV.The reactive tank A-I of indication is a container, can be rectangular parallelepiped, but is not limited to rectangular parallelepiped.In reactive tank A-I, form the active sludge intermixture of certain volume and concentration by steps such as sludge seeding, domestication cultivations.Guiding device A-II is-individual (or several) dividing plate A-V, reactive tank is separated into the unit A-VI that two (or a plurality of) are connected, and form circulation A-VII between its effect reactive tank unit A-VI that to be the guiding current be connected in the both sides of dividing plate A-V.The aerating apparatus A-III of the indication reaction tank bottom that is laid in links to each other with external compressed air source by pipeline, blasts air in reactor.Aerating system A-III is made up of two groups of (or many groups) aerating apparatus unit A-VIII, and an aeration unit A-VIII is installed in the bottom of each reactive tank unit A-VI.Different aeration unit A-VIII can independent control.
2) set up dynamic biological membrane module B.Dynamic biological membrane module B can be arranged in parallel at a distance of certain distance by a plurality of identical dynamic biological membrane module unit B-I and form.The feature of assembly unit B-I is to comprise dynamic biological film loading end B-II, support B-III and discharging device B-IV composition.Support B-III can be the sheet frame shape, also can be other shape.Constitute the material of loading end B-II, can select the mesh grid of various materials, comprise organic synthetic materials mesh grid, natural from metallic substance mesh grids such as material mesh grid, stainless (steel) wire, copper mesh etc., also can select nonwoven cloth material for use, or other have the material of screening filteration.The optimum range in the aperture of mesh grid is 300 orders～40 orders.B-II covers on the B-III, and the two forms the internal cavities B-V of a sealing.The sealing of indication is meant that water can only see through loading end B-II and enter B-V.The effect of discharging device B-IV is the water among the B-V to be drawn and be convenient to collect to become water outlet.The discharging device B-IV of each unit B～I of same assembly B can interconnect, and forms a total discharging device (discharging device that perhaps is called assembly B) B-VI.
3) in bio-reactor A, lay dynamic film component B, and reactive tank unit A-VI-1 that has laid dynamic film component B and the reactive tank unit A-VI-0 that does not lay B are arranged alternately.
4) water feed apparatus of unlatching reactor is opened the aeration unit A-VIII-0 among the reactive tank unit A-VI-0 that B is not installed simultaneously.When being higher than the water outlet of discharging device B-VII, the liquid level in the reactor forms a water outlet head A-IX, under the A-IX effect, mixed solution in the bio-reactor begins to see through the cavity B-V that carrier side B-II enters assembly unit, and flows out from the water outlet of B-VI, becomes the water outlet of total system.Follow water outlet, deposition is based on the microbial film of active sludge on carrier side.This microbial film can be trapped in the materials such as suspended solids in the water outlet in the reactor the wherein contained pollutent of can further degrading on the other hand on the one hand.The water outlet at initial stage is relatively more muddy, can be with among this part water outlet Returning reactor.Usually after 10～30 minutes, the suspended solids in the water outlet (SS) concentration can be reduced to below the 5mg/L, and can further will arrive near 0.The water outlet of this moment promptly can be as the normal water outlet of reactor.
5) water inlet of stopped reaction device and the air inlet of aeration unit A-VIII-0 when dynamic biological membrane module B takes place to stop up is reduced to the air inlet that aeration unit A-VIII-1 is opened in 0 back at water outlet head A-IX, with sedimentary dynamic biological membrane removal on the carrier side.
6) make Sewage treatment systems of the present invention by 4) and 5) described mode periodically moves.Method of the present invention has following feature:
7) active sludge of utilization suspension is eliminated the most pollution substances in the processed water, penetrate in the process of dynamic biological film at muddy water mixed solution subsequently, utilize the further removal of pollutants of biochemical action of dynamic biological film, and by the sieving action of dynamic biological film the suspended solid in the muddy water mixed solution is trapped in the reaction unit, contain suspended solid material in the final outflow water hardly and make.
8) the suspension active sludge of indication and dynamic biological film are integrated in the same aerating container.
9) the dynamic biological film of indication is the membranaceous active sludge that is deposited on when the mixed solution of indication sees through the dynamic biological membrane carrier on the carrier.
10) above-mentioned muddy water mixed solution forms final outflow water behind the dynamic biological film that penetrates indication under the effect of waterpower deadweight, and the waterpower deadweight of indication is formed in the liquid level difference that is less than or equal to 5cm of dynamic biological film both sides.
11) in the time of can not keeping stable effluent flux when dynamic biological film generation obstruction, utilize the method for carrying out aeration below the dynamic biological film, it is moving to form the gas-solid liquid three-phase fluid that is parallel to dynamic biological film surface, and the dynamic biological film is removed from carrier.
12) the dynamic biological film deposits and is eliminated and has periodically, and the periodic one-period of indication is meant that a dynamic biological film begins depositing on the carrier by the timed interval between removing from carrier.The present invention proposes the waste disposal plant that adopts aforesaid method, have following feature:
1) comprises bio-reactor and dynamic biological membrane module.
2) bio-reactor of indication comprises reactive tank, aerating apparatus, guiding device and Inlet and outlet water device.
3) guiding device of indication is separated into the two or more reactive tanks unit that is connected with reactive tank, and at the aerating apparatus of each reactive tank unit bottom laying indication, the aeration in the differential responses groove unit can independent control.
4) the dynamic biological membrane module of indication is placed in a part of unit of above-mentioned reactive tank, and the reactive tank unit of not placing the dynamic biological membrane module and placing the dynamic biological membrane module is arranged alternately.
5) the dynamic biological membrane module of indication has the sedimentary loading end of Gong the microbial film that is made of porous material.
6) porous material of indication can be various materials with sieve performance, and the aperture of sieve aperture is preferably between 300 orders～40 orders, but is not limited thereto scope.
7) form gas-solid liquid three phase circulations by the guiding device of indication and the acting in conjunction of aerating apparatus in bio-reactor, the part of this circulation is that the gas-solid liquid three-phase fluid that is parallel to dynamic biological film surface of indication in the right 1 is moving.
8) place aerating apparatus in aerating apparatus and the reactive tank unit of not placing the dynamic biological membrane module in the reactive tank unit of dynamic biological membrane module with mode aeration in reactor of alternation; In a cycle of operation, when the dynamic biological film takes place as during the obstruction of right 1 indication, only make the aerating apparatus aeration in reactor in the reactive tank unit of placement dynamic biological membrane module as right 1 indication; This cycle of operation At All Other Times in, only make the aerating apparatus aeration in reactor in the reactive tank unit of not placing the dynamic biological membrane module.
The invention effect:
The present invention is integrated in aeration tank activated sludge process and biomembrance process in the same reactor to the efficient degradation effect of pollutent and the efficient screening filteration of dynamic biological film, has not only improved the removal effect to organic pollutant, also has following advantage:
(1) to the solid-liquid separation effect of water outlet can be near 100% (suspended sediment concentration in the water outlet less than＜5mg/L), and solid-liquid separation effect is not subjected to the influence of mixed solution settleability, the intrasystem cell residence time is separated fully with hydraulic detention time, be convenient to operational management;
(2) help the propagation of poky microorganisms such as nitrobacteria, system can reach more than 95% to ammonia-N removal rate;
(3) owing to the second pond of having cancelled in the traditional wastewater processing, and intrasystem hydraulic detention time is short, has therefore saved floor space;
(4) keep high sludge concentration in the system, be convenient to reduce sludge loading, reduce excess sludge production;
(5) be convenient to realize the operational management of automatization.
Embodiment one: with the aperture is the loading end that 300 purpose nylon wires constitute the dynamic biological membrane module.Fig. 1 is the device synoptic diagram of present embodiment, and Fig. 2 is the dynamic biological membrane module synoptic diagram of indication.In this example, the reactive tank unit number of not placing the dynamic biological membrane module is 1: 1 with the ratio of the reactive tank unit number of having placed the dynamic biological membrane module.1 is reactive tank among Fig. 1, and 2 is guiding device, and 3 is aerating system, 4 is the discharging device of dynamic biological membrane module, and 5 is the dynamic biological membrane module, and 6 is the support of dynamic biological membrane module unit, 7 is the loading end of dynamic biological membrane module unit, and 8 is the discharging device of dynamic biological membrane module unit.Use method and apparatus Treating Municipal Sewage of the present invention.The main water-quality guideline of processed water: chemical oxygen demand cod concentration is 300mg/L～600mg/L, ammonia-state nitrogen NH
3The concentration of-N is 20～40mg/L, pH=6.7～7.5.In conjunction with the accompanying drawings embodiment is described in detail as follows.
In the present embodiment, the main operating parameter of bio-reactor: mixed solution suspended sludge concentration is 4000～5000mg/L; The hydraulic detention time of bio-reactor 3 hours, sludge retention time 60 days; The concentration of dissolved oxygen is 3～5mg/L in the reactor.The main operating parameter of dynamic biological film: hydraulic load is 20L/ (m
2H); Liquid level difference as shown in Figure 1 is 0.6cm in the stationary value of starting stage, and the cycle of operation is 10 days, and the liquid level difference the when cycle ends is 4cm.
Under the driving of diagram liquid level difference, the loading end that the mixed solution in the reactor sees through the dynamic biological membrane module enters the internal cavities of dynamic biological assembly unit, flows out by water outlet discharging device 4 and is collected as water outlet.In each cycle of operation, bio-reactor is returned in the water outlet in initial half an hour.The effect of actual motion: the suspended sediment concentration of water outlet is less than 2mg/L, but is 0 in most cases; Turbidity is less than 1NTU; COD in the final outflow water
CrConcentration is less than 30mg/L, BOD
5Less than 5mg/L; NH in the water outlet
3-N is less than 1mg/L.These parameters meets the relevant regulations of Ministry of Construction's reclaimed water (carwash, cleaning) water quality standard CJ25.2-89.In this example, the COD that the active sludge that suspends in the biological reaction tank is removed accounts in the water COD greater than 80%, and the COD that the dynamic biological film is removed accounts for total COD in the water into greater than 10%.
Embodiment two: adopting the aperture is the loading end that 40 purpose stainless (steel) wires constitute the dynamic biological membrane module.Fig. 3 is the apparatus system synoptic diagram of present embodiment, and the contour structures of dynamic biological membrane module is identical as shown in Figure 2.In this example, the reactive tank unit of not placing the dynamic biological membrane module is 2 with the ratio of the reactive tank number of unit of placing the dynamic biological membrane module.9 is reactive tank among Fig. 3, and 10 is guiding device, and 11 is aerating apparatus, and 12 is discharging device, and 13 is the dynamic biological membrane module.Use the excrement and urine water in the method and apparatus Agro-ecology of the present invention sub-district.The main water-quality guideline of processed water: chemical oxygen demand cod concentration is 600mg/L～1000mg/L, ammonia-state nitrogen NH
3The concentration of-N is 40～60mg/L, pH=6.7～7.5.3 pairs of present embodiments are described in detail as follows in conjunction with the accompanying drawings.
The operating parameter of bio-reactor: suspended sediment concentration is 8000～10000mg/L; Sludge retention time is 30 days, and hydraulic detention time is 4 hours; Dissolved oxygen concentration is 2～3mg/L.The main operating parameter of dynamic biological film: hydraulic load is 15L/ (m
2H), water outlet liquid level difference as shown in Figure 3 is 0.5mm in the starting stage of each cycle of operation, and the cycle of operation is 7 days, and the water outlet liquid level difference the when cycle stops is 5cm.Implementation result: the suspended sediment concentration in the water outlet is less than 5mg/L, and delivery turbidity is less than 5NTU, the COD in the water outlet
CrConcentration is less than 80mg/L, BOD
5Concentration less than 10mg/L, ammonia nitrogen NH in the water outlet
3The concentration of-N is less than 1.5mg/L.In this example, the COD that the active sludge of the suspension in the biological reaction tank is removed accounts for into more than 75% of water COD, and the COD that the dynamic biological film is removed accounts for into more than 15% of water COD.
Embodiment 3: select for use non-woven fabrics NWA50 to constitute the loading end of dynamic biological membrane module.The apparatus system synoptic diagram of present embodiment is seen Fig. 1, and the synoptic diagram of dynamic biological membrane module is seen Fig. 2.Use method and apparatus Treating Municipal Sewage of the present invention, the main water quality data of water inlet: COD concentration is 200～400mg/L, NH
3The concentration of-N is 20～40mg/L, and pH is 6.8～7.4.1 pair of present embodiment is described in detail as follows in conjunction with the accompanying drawings.
The operating parameter of bio-reactor: suspended sediment concentration is 4000～6000mg/L; Sludge retention time is 80 days, and hydraulic detention time is 3.5 hours; Dissolved oxygen concentration is 3～4mg/L.The main operating parameter of dynamic biological film: hydraulic load is 24L/ (m
2H), water outlet liquid level difference as shown in Figure 1 is 0.9mm in the starting stage of each cycle of operation, and the cycle of operation is 12 days, and the water outlet liquid level difference the when cycle stops is 5cm.Implementation result: the suspended sediment concentration in the water outlet is less than 5mg/L, and delivery turbidity is less than 5NTU, the COD in the water outlet
CrConcentration is less than 30mg/L, BOD
5Concentration less than 3mg/L, ammonia nitrogen NH in the water outlet
3The concentration of-N is less than 1.0mg/L.In this example, the COD that the active sludge of the suspension in the biological reaction tank is removed accounts for into more than 80% of water COD, and the COD that the dynamic biological film is removed accounts for into more than 10% of water COD.
Claims (2)
1. the synergy of the active sludge of using suspension and the dynamic biological film method of carrying out sewage disposal is characterized in that:
1) active sludge of utilization suspension is eliminated the most of pollution substance in the processed water, penetrate in the process of dynamic biological film at muddy water mixed solution subsequently, utilize the further removal of pollutants of biochemical action of dynamic biological film, and by the sieving action of dynamic biological film the suspended solid in the muddy water mixed solution is trapped in the reaction unit, contain suspended solid material in the final outflow water hardly and make.
2) the suspension active sludge of indication and dynamic biological film are integrated in the same aerating container, and the dynamic biological film of indication is the membranaceous active sludge that is deposited on when said mixed solution sees through the dynamic biological membrane carrier on the carrier.
3) muddy water mixed solution forms final outflow water behind the dynamic biological film that penetrates indication under the effect of waterpower deadweight, and the waterpower deadweight of indication is formed in the liquid level difference that is less than or equal to 5cm of dynamic biological film both sides.
4) in the time of can not keeping stable effluent flux when dynamic biological film generation obstruction, utilize the method for carrying out aeration below the dynamic biological film, it is moving to form the gas-solid liquid three-phase fluid that is parallel to dynamic biological film surface, and the dynamic biological film is removed from carrier.
5) the dynamic biological film deposits and is eliminated and has periodically, and the periodic one-period of indication is meant that a dynamic biological film begins depositing on the carrier by the timed interval between removing from carrier.
2. use method according to claim 1 and be applicable to the waste disposal plant of the described method of claim 1, have following feature:
1) comprises bio-reactor and dynamic biological membrane module; The bio-reactor of indication comprises reactive tank, aerating apparatus, guiding device and Inlet and outlet water device, the guiding device of indication is separated into reactive tank the two or more reactive tanks unit that is connected, lay the aerating apparatus of indication in each reactive tank unit bottom, the aeration in the differential responses groove unit can independent control; The dynamic biological membrane module of indication is placed in a part of unit of above-mentioned reactive tank, and the reactive tank unit of not placing the dynamic biological membrane module and placing the dynamic biological membrane module is arranged alternately.
2) the dynamic biological membrane module of indication has the sedimentary loading end of Gong the microbial film that is made of porous material, and the porous material of indication can be various materials with sieve performance, and the aperture of sieve aperture is preferably between 300 orders～40 orders, but is not limited thereto scope.
3) form gas-solid liquid three phase circulations by the guiding device of indication and the acting in conjunction of aerating apparatus in bio-reactor, the part of this circulation is that the said gas-solid liquid three-phase fluid that is parallel to dynamic biological film surface moves in the right 1.
4) place aerating apparatus in aerating apparatus and the reactive tank unit of not placing the dynamic biological membrane module in the reactive tank unit of dynamic biological membrane module with mode aeration in reactor of alternation; As right in the 1 said cycle of operation, when the dynamic biological film takes place as during the obstruction of right 1 indication, only make the aerating apparatus aeration in reactor in the reactive tank unit of placement dynamic biological membrane module; This cycle of operation At All Other Times in, only make the aerating apparatus aeration in reactor in the reactive tank unit of not placing the dynamic biological membrane module.
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| CNA021308977A CN1490259A (en) | 2002-10-15 | 2002-10-15 | Sewage treating method and apparatus by dynamic biologic membrane and activating mud |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125806A (en) * | 2010-01-20 | 2011-07-20 | 中国科学院生态环境研究中心 | Method for applying spiral membrane assembly to vacuum membrane distillation |
| CN102167441A (en) * | 2011-03-01 | 2011-08-31 | 山东大学 | Two-stage running mode of dynamic membrane bioreactor |
| CN103496784A (en) * | 2013-10-21 | 2014-01-08 | 东华大学 | Self-forming dynamic membrane bioreactor using aerobic granule sludge |
| CN115340175A (en) * | 2022-08-17 | 2022-11-15 | 四川发展环境科学技术研究院有限公司 | Double-membrane sewage treatment device and treatment method thereof |
-
2002
- 2002-10-15 CN CNA021308977A patent/CN1490259A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125806A (en) * | 2010-01-20 | 2011-07-20 | 中国科学院生态环境研究中心 | Method for applying spiral membrane assembly to vacuum membrane distillation |
| CN102167441A (en) * | 2011-03-01 | 2011-08-31 | 山东大学 | Two-stage running mode of dynamic membrane bioreactor |
| CN103496784A (en) * | 2013-10-21 | 2014-01-08 | 东华大学 | Self-forming dynamic membrane bioreactor using aerobic granule sludge |
| CN103496784B (en) * | 2013-10-21 | 2015-08-12 | 东华大学 | A kind of self-forming dynamic membrane bioreactor using aerobic particle mud |
| CN115340175A (en) * | 2022-08-17 | 2022-11-15 | 四川发展环境科学技术研究院有限公司 | Double-membrane sewage treatment device and treatment method thereof |
| CN115340175B (en) * | 2022-08-17 | 2023-07-25 | 四川发展环境科学技术研究院有限公司 | Double-membrane sewage treatment device and treatment method thereof |
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