CN103406026A - Double-layer structured flat membrane element for membrane bioreactor - Google Patents
Double-layer structured flat membrane element for membrane bioreactor Download PDFInfo
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- CN103406026A CN103406026A CN2013103029666A CN201310302966A CN103406026A CN 103406026 A CN103406026 A CN 103406026A CN 2013103029666 A CN2013103029666 A CN 2013103029666A CN 201310302966 A CN201310302966 A CN 201310302966A CN 103406026 A CN103406026 A CN 103406026A
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Abstract
The invention discloses a double-layer structured flat membrane element for a membrane bioreactor. The double-layer structured flat membrane element for membrane bioreactor is a one-sided double-layer flat membrane element or a two-sided double-layer flat membrane element, and comprises a guide plate, a guide cloth, a microfiltration or ultrafiltration membrane and a membrane-shaped filler layer. The double-layer structured flat membrane is obtained through installing the membrane-shaped filler layer on a traditional single-layer flat membrane. The membrane-shaped filler layer is in favor of the formation and growth of the biomembrane, and can prevent the direct adherence of particles in sewage to the microfiltration or ultrafiltration membrane to form multilayer filtration. Compared with traditional flat membrane elements, the membrane element disclosed in the invention has the advantages of difficult obstruction and pollution, improved work efficiency, good nitrogen removal capability, good outlet water quality, and stable and reliable running.
Description
Technical field
The present invention relates to a kind of double-deck flat membrane component for membrane bioreactor.
Background technology
Along with country strengthens the input to environmental protection, wastewater treatment more and more is subject to popular the attention.Bioprocess technology is adopted in wastewater treatment at present usually, and traditional bioprocess technology all will be done subsequent treatment with secondary sedimentation tank.This process spent water processing procedure is longer, and the secondary sedimentation tank floor space is large, invests high.Therefore, this treatment system and technique be not suitable for present development trend.
In recent years, membrane bioreactor (Membrane Bioreactor is called for short MBR) becomes the main flow treatment process gradually.Membrane bioreactor is the sewage treatment process that a kind of high performance membrane isolation technics combines with activated sludge process, namely in traditional bioreactor, increases membrane filtration module, through biodegradation, micro-filtration (or ultrafiltration), removes the pollutant in sewage.Typical MBR system comprises two kinds of immersion MBR and limit streaming MBR.With conventional processes, compare, this technique has higher biodegradation efficiency and lower sludge yield, floor space is little, and stable effluent quality, system is simple, dwell time of sewage is short, be convenient to old system upgrade, mud age (SRT) long, SRT and HRT can control respectively etc. characteristics.MBR, aspect waste water reclaiming and middle water reuse, having huge potentiality, has been subject to common concern both domestic and external.
But there are some problems in MBR in the through engineering approaches application.First problem is, easily pollute on MBR film in service surface, caused film pressure (TMP) to rise rapidly, and membrane flux decline affects treatment effeciency and increases film cleaning cost.Therefore, pollute to control be the Main Topics of MBR in recent years to film.Second Problem is the nitric efficiency problem of MBR.Although conventional MBR PROCESS FOR TREATMENT city domestic sewage can obtain the water outlet of low SS, the removal of nitrogen is difficult to reach more and more strict emission request, this has affected MBR and has further applied.For addressing these problems, existing people proposes the compound denitrification process of multiple MBR.For example A/O-MBR, be by preposition anoxic pond, to strengthen the denitrification effect finally to improve denitrification ability; Sequencing batch membrane bioreactor is at traditional MBR reactor, to increase the operation of agitator by the intermittent aerating batch-type to improve denitrification ability.Though these improve technique, have good denitrification ability, also greatly increased complexity, floor space and the construction cost of technique, therefore in application, still have obstacle.
Summary of the invention
The object of the present invention is to provide a kind of double-deck flat membrane component for membrane bioreactor.
The technical solution used in the present invention is:
A kind of double-deck flat membrane component for membrane bioreactor, it is single-surface double-layer flat membrane component or two-sided double-deck flat membrane component, it comprises deflector, flow-guiding cloth, micro-filtration or milipore filter and membranaceous packing layer.
The material of described membranaceous packing layer is a kind of in sponge, soft-filler, thick fiber cloth, rock wool, mineral wool; The thickness of described membranaceous packing layer is 0.5cm ~ 3cm.
Arbitrary of described two-sided double-deck flat membrane component, comprise membranaceous packing layer, micro-filtration or the milipore filter, flow-guiding cloth, the deflector that arrange from outside to inside, and deflector is arranged on middle and is one; The wherein one side of described single-surface double-layer flat membrane component, comprise membranaceous packing layer, micro-filtration or the milipore filter, flow-guiding cloth, the deflector that arrange from outside to inside.The aperture of described micro-filtration or milipore filter is 0.1 μ m ~ 5 μ m; The material of described micro-filtration or milipore filter is a kind of in PVDF, nonwoven, PTFE, PP.
The thickness of described deflector is 1cm ~ 2cm, and baffle surface is provided with some grooves, and recess width is 0.5 ~ 1cm.
Described deflector top is provided with pump orifice, and the diameter of pump orifice is less than the thickness of deflector, and its diameter is 0.7cm ~ 1.5cm.
The material of described deflector is plastics, aluminium alloy or stainless steel.
The material of described flow-guiding cloth is chemical fiber fabric, and its thickness is 0.1mm ~ 0.2mm.
The invention has the beneficial effects as follows: the double-layered flat membrane that the present invention makes is compared with the conventional monolayers flat sheet membrane, sets up the membranaceous packing layer of one deck.Membranaceous packing layer is conducive to biomembranous formation and growth, and can stop that the particle in sewage directly sticks on micro-filtration or milipore filter, forms multiple filtration.Therefore, membrane component be difficult for to stop up, pollutes, and operating efficiency improves, and for well, effluent quality is good, stable and reliable operation than traditional flat membrane component for its denitrification ability simultaneously.
The accompanying drawing explanation
Fig. 1 is the structural representation of flat membrane component.
Fig. 2 is the side view of single face flat membrane component.
Fig. 3 is the side view of two-sided flat membrane component.
Fig. 4 is the structural representation of double-layer plate membrane component of the present invention.
Fig. 5 is the side view of two-sided double-deck flat membrane component of the present invention.
Fig. 6 is the simulation sewage-treatment plant.
Fig. 7 is that the mistake film pressure (TMP) of different membrane structures in the simulation sewage disposal running of the embodiment of the present invention is with variation diagram running time.
The specific embodiment
As shown in Figure 1, be the structural representation of traditional flat membrane component, comprise micro-filtration that ecto-entad arranges or milipore filter 1, flow-guiding cloth 2, deflector 3, it is the 3-5 bar that deflector 3 is provided with some groove 4(groove numbers), on deflector 3 tops, be provided with pump orifice 5.
Being illustrated in figure 2 the side view of traditional single face flat membrane component, is micro-filtration or milipore filter 1, flow-guiding cloth 2, deflector 3 from outside to inside, and pump orifice 5 is set on deflector.
Be illustrated in figure 3 the side view of traditional two-sided flat membrane component, innermost layer is deflector 3, the top of deflector is provided with pump orifice 5, the both sides of deflector 3 are provided with flow-guiding cloth 21, flow-guiding cloth 22, flow-guiding cloth 21 opposite sides are provided with micro-filtration or milipore filter 11, and flow-guiding cloth 22 opposite sides are provided with micro-filtration or milipore filter 12.
As shown in Figure 4, structural representation for double-layer plate membrane component of the present invention, the membranaceous packing layer 41 that comprises ecto-entad, micro-filtration or milipore filter 1, flow-guiding cloth 2, deflector 3, deflector 3 is provided with some grooves 4, on deflector 3 tops, be provided with pump orifice 5, this structural representation can be illustrated the structure (from a face) of single-surface double-layer flat sheet membrane of the present invention, also can illustrate the structure of two-sided double-deck flat sheet membrane of the present invention (from two faces, it is all the membranaceous packing layer from outer to inner arranged, micro-filtration or milipore filter, flow-guiding cloth, deflector, deflector is arranged on middle and only has one, Fig. 5 is shown in by side view about the two-sided double-deck flat sheet membrane).
It as Fig. 5, is the side view of two-sided double-deck flat membrane component of the present invention, innermost layer is deflector 3, the top of deflector is provided with pump orifice 5, the both sides of deflector 3 are provided with flow-guiding cloth 21, flow-guiding cloth 22, flow-guiding cloth 21 opposite sides are provided with micro-filtration or milipore filter 11, flow-guiding cloth 22 opposite sides are provided with micro-filtration or milipore filter 12, at micro-filtration or the membranaceous packing layer 41 of milipore filter 11 surface coverage one deck, at micro-filtration or the membranaceous packing layer 42 of milipore filter 12 surface coverage one deck, namely this structure is for all covering the membranaceous packing layer of one deck on two side forms of the two-sided flat membrane component of tradition; Certainly, when flat membrane component used is traditional single face flat membrane component, according to same technical thought, can on the film of traditional single face flat membrane component, covers the membranaceous packing layer of one deck and can obtain single-surface double-layer flat membrane component of the present invention.
Described membranaceous packing layer is a kind of in sponge, soft-filler, thick fiber cloth, rock wool, mineral wool; The thickness of described membranaceous packing layer is 0.5cm ~ 3cm.
The aperture of described micro-filtration or milipore filter is 0.1 μ m ~ 5 μ m; The material of described micro-filtration or milipore filter is a kind of in PVDF, nonwoven, PTFE, PP.
The thickness of described deflector is 1cm ~ 2cm, the material of described deflector is plastics, aluminium alloy or stainless steel, baffle surface is provided with some grooves (not expressing in Fig. 2,3,5), recess width is 0.5 ~ 1cm, described deflector top is provided with pump orifice, and the diameter of pump orifice is less than the thickness of deflector, its diameter is 0.7cm ~ 1.5cm.
The material of described flow-guiding cloth is chemical fiber fabric, and its thickness is 0.1mm ~ 0.2mm.
The present invention is described further below in conjunction with specific embodiment:
Embodiment 1:
Prepare: 30cm*20cm*1cm plastics deflector, 30cm*20cm chemical fibre flow-guiding cloth, 30cm*20cm PVDF milipore filter, 30cm*20cm*1cm sponge.
The duplicature element: the plastics deflector with 30cm*20cm*1cm (equidistantly arranges 3 grooves on deflector, the width of groove is 0.8cm) for supporting, two sides is from inside to outside laid the PVDF milipore filter (aperture 0.1 μ m) of chemical fibre flow-guiding cloth (thickness is 0.1mm), 30cm*20cm, 30cm*20cm*1cm sponge successively; The deflector of membrane component, flow-guiding cloth, milipore filter and sponge are fixed and seal along surrounding with water-resistant adhesives.This membrane component has two-sided, the two-sided double membrane structure that is, and structure is as shown in Figure 5.There is pump orifice (diameter of pump orifice is 0.8cm) the membrane component top, can the water pump connection carry out suction filtration.
Simulation sewage-treatment plant in conjunction with Fig. 6 illustrates wastewater treatment efficiency of the present invention now:
Simulation sewage disposal experiment: two-sided double-deck flat sheet membrane 2 is placed in reactor 1, its top pump orifice is connected with peristaltic pump 52 by water pipe, the acting as of peristaltic pump 52 extracted water out that (water flow is controlled to be 40ml/min, hydraulic detention time is 18 hours), reactor 1 outer sanitary sewage bucket 4 arrives in reactor 1 by cross current, by the peristaltic pump 51 arranged on water pipe, the sewage in the sanitary sewage bucket is pumped in reactor; In addition, the outer air pump 6 of reactor 1 is communicated to three aeration heads 31,32,33 that evenly arrange in reactor by tracheae, flowmeter 7 is set on tracheae.
As a comparison, the a set of individual layer conventional film element of another making, its structure with the duplicature element is compared and is not laid spongy layer (only comprising deflector, flow-guiding cloth and milipore filter), and other conditions and parameter setting (condition setting of simulation sewage disposal experiment also is consistent) all are consistent.
In reactor, the content of activated sludge is 4g/l.Entering organic matter of water concentration is 386.1mgCOD/L, and influent ammonium concentration is 45.6 mgN/L.Duration of experiment is 312 hours, and two kinds of all operations continuously of membrane component, do not carry out physics or Chemical cleaning midway.
Measure the situation of COD, ammonia nitrogen paired observation conventional monolayers film and the double-layered flat membrane of Inlet and outlet water every day.Through experiment in 312 hours, result showed, double-layered flat membrane and conventional monolayers flat sheet membrane all can effectively be removed organic matter, and the COD clearance has all reached 99%, showed that the organic matter removal of double-layered flat membrane is functional.Ammonia nitrogen removal frank shows, the water outlet ammonia nitrogen removal frank of double-layered flat membrane reaches 78% ± 10%, and the average water outlet ammonia nitrogen removal frank of conventional monolayers flat sheet membrane only has 65% ± 10%.The difference of ammonia nitrogen removal frank shows, double-layered flat membrane has higher ammonia nitrogen removal ability.This be due to double-layered flat membrane with packing layer, be conducive to the growth of nitrifier, thereby make sewage when passing through packing layer, obtain further nitrated processing.The conventional monolayers flat sheet membrane is owing to there is no packing layer, and its ammonia nitrogen removal effect will be weaker than double-layered flat membrane.The TMP data relatively in (as Fig. 7), the TMP of double-layered flat membrane increases gently in the running of 312 hours, and the conventional monolayers flat sheet membrane occurs namely that TMP rises to phenomenon in operation after 200 hours.This shows that the stratiform sponge filler film in double-layered flat membrane has played the accumulation of minimizing particle, decelerating membrane pollution effect.Therefore, the demonstration of the result of this embodiment, double-layer plate membrane component of the present invention can play the functions such as the pollution of minimizing film, raising film operating efficiency and life-span, raising ammonia nitrogen removal efficiency.
Fig. 7 is that the mistake film pressure (TMP) of different membrane structures in the simulation sewage disposal running of the invention process case is with variation diagram running time.
The flat sheet membrane that the present invention makes is owing on the classic flat-plate film, being provided with membranaceous packing layer, forms double medium filtration, so membrane component is difficult for blocking pollution, improved operating efficiency and service life.Simultaneously microorganism is easy on packing layer, grow and form biomembrane, can promote nitrobacteria growth, so its denitrification ability is better than traditional individual layer flat membrane component, and effluent quality is good, stable and reliable operation.
Claims (8)
1. double-deck flat membrane component for membrane bioreactor is characterized in that: it is single-surface double-layer flat membrane component or two-sided double-deck flat membrane component, and it comprises deflector, flow-guiding cloth, micro-filtration or milipore filter and membranaceous packing layer.
2. a kind of double-deck flat membrane component for membrane bioreactor according to claim 1 is characterized in that: the material of described membranaceous packing layer is a kind of in sponge, soft-filler, thick fiber cloth, rock wool, mineral wool; The thickness of described membranaceous packing layer is 0.5cm ~ 3cm.
3. a kind of double-deck flat membrane component for membrane bioreactor according to claim 1, it is characterized in that: arbitrary of described two-sided double-deck flat membrane component, comprise membranaceous packing layer, micro-filtration or the milipore filter, flow-guiding cloth, the deflector that arrange from outside to inside, deflector is arranged on middle and is one; The wherein one side of described single-surface double-layer flat membrane component, comprise membranaceous packing layer, micro-filtration or the milipore filter, flow-guiding cloth, the deflector that arrange from outside to inside.
4. a kind of double-deck flat membrane component for membrane bioreactor according to claim 1, it is characterized in that: the aperture of described micro-filtration or milipore filter is 0.1 μ m ~ 5 μ m; The material of described micro-filtration or milipore filter is a kind of in PVDF, nonwoven, PTFE, PP.
5. according to the described a kind of double-deck flat membrane component for membrane bioreactor of claim 3 or 4, it is characterized in that: the thickness of described deflector is 1cm ~ 2cm, and baffle surface is provided with some grooves, and recess width is 0.5 ~ 1cm.
6. according to the described a kind of double-deck flat membrane component for membrane bioreactor of claim 3 or 4, it is characterized in that: described deflector top is provided with pump orifice, and the diameter of pump orifice is less than the thickness of deflector, and its diameter is 0.7cm ~ 1.5cm.
7. according to the described a kind of double-deck flat membrane component for membrane bioreactor of claim 3 or 4, it is characterized in that: the material of described deflector is plastics, aluminium alloy or stainless steel.
8. according to the described a kind of double-deck flat membrane component for membrane bioreactor of claim 3 or 4, it is characterized in that: the material of described flow-guiding cloth is chemical fiber fabric, and its thickness is 0.1mm ~ 0.2mm.
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| CN2013103029666A CN103406026A (en) | 2013-07-18 | 2013-07-18 | Double-layer structured flat membrane element for membrane bioreactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964635A (en) * | 2014-04-28 | 2014-08-06 | 中国建筑东北设计研究院有限公司 | Metal double-layered membrane bioreactor for sewage treating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663406Y (en) * | 2003-10-24 | 2004-12-15 | 中国科学院上海应用物理研究所 | Immersed type plain film filter membrane element of membrane bioreactor |
| CN101817588A (en) * | 2010-05-10 | 2010-09-01 | 东南大学 | Activated sludge reaction separation method and device for sewage by sponge substrate |
| CN202054660U (en) * | 2011-03-02 | 2011-11-30 | 江苏大孚膜科技有限公司 | Immersed flat plate filter membrane element for membrane bioreactor |
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- 2013-07-18 CN CN2013103029666A patent/CN103406026A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663406Y (en) * | 2003-10-24 | 2004-12-15 | 中国科学院上海应用物理研究所 | Immersed type plain film filter membrane element of membrane bioreactor |
| CN101817588A (en) * | 2010-05-10 | 2010-09-01 | 东南大学 | Activated sludge reaction separation method and device for sewage by sponge substrate |
| CN202054660U (en) * | 2011-03-02 | 2011-11-30 | 江苏大孚膜科技有限公司 | Immersed flat plate filter membrane element for membrane bioreactor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964635A (en) * | 2014-04-28 | 2014-08-06 | 中国建筑东北设计研究院有限公司 | Metal double-layered membrane bioreactor for sewage treating |
| CN103964635B (en) * | 2014-04-28 | 2015-10-28 | 中国建筑东北设计研究院有限公司 | A kind of metal bi membrane bioreactor of disposing of sewage |
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Application publication date: 20131127 |