CN209906442U - Biological membrane sewage treatment device - Google Patents
Biological membrane sewage treatment device Download PDFInfo
- Publication number
- CN209906442U CN209906442U CN201920298796.1U CN201920298796U CN209906442U CN 209906442 U CN209906442 U CN 209906442U CN 201920298796 U CN201920298796 U CN 201920298796U CN 209906442 U CN209906442 U CN 209906442U
- Authority
- CN
- China
- Prior art keywords
- sewage
- microorganisms
- biofilm
- attached
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model relates to the field of wastewater treatment, and provides a biomembrane sewage treatment device, which comprises a filter tank, wherein a carrier is arranged in the filter tank, microorganisms are gathered and attached on the surface of the carrier to form a biomembrane under the condition of oxygenation, and the microorganisms in the biomembrane absorb and decompose organic matters in sewage to purify the sewage; after microorganisms are gathered and attached on the surface of the carrier to form a biological membrane, a thin water layer exists on the surface of the biological membrane due to the adsorption effect of the biological membrane, the water layer is an attached water layer, and a flowing sewage layer is arranged outside the attached water layer; an aeration device and a cross flow pump are also arranged in the filtering tank. The utility model provides a cross-flow pump can promote the attached water layer and flow, makes the biomembrane contact sewage at any time, has promoted the efficiency of biomembrane treatment sewage greatly, can reduce sewage treatment's cost.
Description
Technical Field
The utility model belongs to the sewage treatment field relates to a sewage treatment plant, in particular to biomembrane sewage treatment plant.
Background
The biofilm process is a sewage treatment process for stabilizing and clarifying sewage by using a biofilm under the condition of sufficient oxygen supply. Biofilms are ecosystems composed of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa, algae, etc., and their attached solid media are called carriers. The biomembrane from the carrier to the outside can be divided into an anaerobic layer, an aerobic layer, an attached water layer and a sports water layer.
The carrier for microorganism growth and aggregation is arranged in the sewage treatment structure, under the condition of oxygenation, the microorganisms are attached to the surface of the filler to form a biological membrane, and when oxygenated sewage flows through the filler at a certain flow rate, the microorganisms in the biological membrane absorb and decompose organic matters in the water, so that the sewage is purified, the microorganisms are proliferated, and the biological membrane is thickened. When the biological membrane grows to a certain thickness, oxygen diffusing to the interior of the biological membrane is limited, the surface of the biological membrane is still in an aerobic state, and the inner layer is in an anoxic or even anaerobic state, and finally the biological membrane falls off. And then, a new biological film continues to grow on the surface of the filler, and the process is repeated in cycles, so that the sewage is purified.
After the microorganisms are gathered and attached on the surface of the filler to form the biological film, a thin water layer exists on the surface of the filler due to the adsorption effect of the biological film, the water layer is an attached water layer, organic matters in the attached water layer are oxidized and decomposed by the biological film, so that the concentration of the organic matters in the attached water layer is much lower than that of inlet water, when sewage flows through the surface of the biological film, the organic matters are transferred into the attached water layer from the moving sewage and are further adsorbed by the biological film, and meanwhile, oxygen in the air also enters the water layer of the biological film through the sewage and is transferred to the inside.
The microorganisms on the biological membrane decompose organic matters and metabolize the organism in the presence of dissolved oxygen, so that the generated inorganic matters such as carbon dioxide and the like are transferred to flowing sewage or air from the biological membrane through the attached water layer in the opposite direction. Thus, the organic content of the effluent is reduced, and the sewage is purified.
In summary, when the biofilm sewage treatment device is in operation, the contact between the attached water layer and the biofilm is the key of the purification speed, and the current flow between the attached water layer and the flowing sewage layer only depends on the balance of the organic matter concentration and the airflow of the aeration device. The balance of the organic matter concentration means that after the biomembrane purifies the organic matter in the attached water layer, the concentration of the organic matter in the attached water layer is reduced, and the organic matter in the flowing sewage layer automatically flows into the attached water layer, so that the flowing between the attached water layer and the flowing sewage layer is realized; the air flow of the aeration device means that when the aeration device is used for oxygenating sewage, the sewage flows when the aerated air rises or breaks in the sewage, so that the flow between the attached water layer and the flowing sewage layer is realized. However, in the above two methods, the mobility of the adhering water layer is slow, and the biological membrane cannot be used to degrade the organic matters in the wastewater with high efficiency, which causes the problems of low purification efficiency and high purification cost of the biological membrane.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a biomembrane sewage treatment device aiming at the problems in the prior art.
The purpose of the utility model can be realized by the following technical proposal: a biomembrane sewage treatment plant comprises a filtering tank, wherein carriers are arranged in the filtering tank, microorganisms are gathered and attached on the surfaces of the carriers to form biomembranes under the condition of oxygenation, and the microorganisms in the biomembranes absorb and decompose organic matters in sewage to purify the sewage; after microorganisms are gathered and attached on the surface of the carrier to form a biological membrane, a thin water layer exists on the surface of the biological membrane due to the adsorption effect of the biological membrane, the water layer is an attached water layer, and a flowing sewage layer is arranged outside the attached water layer;
an aeration device is also arranged in the filtering tank and is used for oxygenation;
and a cross flow pump is also arranged in the filtering tank, and the flow speed of the attached water layer can be increased by the cross flow pump.
Preferably, the biofilm comprises aerobic layer microorganisms.
Preferably, the biofilm further comprises anaerobic layer microorganisms, the anaerobic layer microorganisms are attached to the carrier, and the aerobic layer microorganisms are attached to the anaerobic layer microorganisms.
Preferably, the aeration device comprises a blower and air conveying pipelines which are uniformly distributed in the filter tank.
Preferably, the pressure of the cross-flow pump is adjustable, and the flow rate of the attached water layer can be adjusted by adjusting the pressure of the cross-flow pump.
Preferably, the carrier is one or a combination of more of ceramsite porous material, quartz sand, plastic filler, crushed stone filler, activated carbon, gravel, fiber balls and zeolite.
Preferably, a back washing device is further arranged in the filter tank and used for washing the biological membrane on the carrier.
Preferably, the biological membrane is an ecosystem consisting of one or more of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae.
Preferably, the biomembrane sewage treatment device further comprises a sedimentation tank, wherein the sedimentation tank is arranged at the downstream of the filtering tank and is used for settling the water filtered by the filtering tank.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses in be equipped with the wrong flow pump, can promote the attached water layer and flow, make the biomembrane contact sewage at any time, promoted the efficiency of biomembrane treatment sewage greatly, can reduce sewage treatment's cost.
2. The utility model provides an it is fast that the adhering to water layer is updated under the promotion of cross flow pump, and the adhering to water layer oxygen content of new formation is abundant, decomposes the organic matter for the good oxygen fungus in the biomembrane and provides sufficient raw materials to difficult anaerobic layer that forms has prolonged the life cycle of biomembrane.
3. The sewage treatment device in the utility model does not grow fly ash, has little smell and better sanitary condition. In the biofilm method, microorganisms are fixedly grown and can form dynamic balance with the concentration of organic matters in a medium, so that the method can be applied to the advanced treatment of low-concentration sewage. In recent years, biofilm methods for domestic and external use have been studied as a supplementary treatment for effluent from biological treatment structures. The biomembrane method is used for nitrification and denitrification of sewage containing ammonia nitrogen (including organic nitrogen) and obtains good effect.
4. The utility model provides a sewage treatment plant biological phase is diversified. The biofilm is a fixed growth, has the condition of forming stable ecology, can inhabit bacteria with low proliferation speed and long generation time and higher micro organisms such as nitrifying bacteria, and has the proliferation speed 40 to 50 times slower than that of common pseudomonas, so that the high denitrification capability can be obtained by using a biofilm method. The organisms appearing on the biofilm are species-rich compared to activated sludge, and in addition to bacteria and protozoa, fungi, algae, metazoan, and macroinvertebrates, etc., which are relatively rare in activated sludge, can also appear.
5. The utility model discloses well biomass is many, equipment throughput is big. The biological membrane has less water content, and the biomass in unit volume can be up to 5-20 times of that of the activated sludge sometimes, so that the filter tank has larger treatment capacity.
6. The utility model discloses surplus sludge's output is few. In the biofilm, many organisms with higher nutrition levels live, the food chain is longer than that of activated sludge, and the amount of excess sludge is less than that of the activated sludge process. In particular, in some biofilm processes, the biofilm is formed by combining an aerobic layer and an anaerobic layer, and anaerobic bacteria in the anaerobic layer can degrade excess sludge synthesized in the aerobic process, so that the total amount of the excess sludge is greatly reduced, which is very beneficial to sludge disposal.
7. The utility model discloses operation management is convenient. The biomembrane method does not need sludge backflow, so that the sludge amount and the sludge discharge amount do not need to be adjusted frequently, and the biomembrane method is easy to maintain and manage. The activated sludge method generally has the problem of sludge bulking, has great influence on the treatment effect and even destroys the treatment process. The biofilm method has no problem because microorganisms are fixedly grown. The mass propagation of filamentous fungi can lead to activated sludge bulking, but on the other hand, filamentous fungi have a rather strong oxidizing capacity. The biofilm method can fully utilize the advantages of the filamentous fungi to overcome the defects.
8. The utility model discloses the process is more stable. The fluctuation of the organic load and the hydraulic load has small influence, and the recovery is fast even if the process is greatly damaged. Due to the characteristic of fixed growth, the treatment structure can also be operated intermittently.
9. The utility model discloses power consumption is few. When the aeration is directly carried out under the filling material, the aeration efficiency is improved due to the re-rupture of the bubbles, and the characteristic that the anaerobic membrane does not consume oxygen is added, so the general power consumption is smaller than that of the activated sludge method.
Drawings
Fig. 1 is a schematic view of the present invention;
in the figure, 1, vector; 2. anaerobic layer microorganisms; 3. aerobic layer microorganisms; 4. attaching a water layer; 5. a mobile sewage layer; 6. and (4) a biological membrane.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
As shown in the figure, the biomembrane sewage treatment device comprises a filtering tank, wherein a carrier 1 is arranged in the filtering tank, microorganisms are gathered and attached on the surface of the carrier 1 to form a biomembrane 6 under the condition of oxygenation, and the microorganisms in the biomembrane 6 absorb and decompose organic matters in sewage to purify the sewage; after microorganisms are gathered and attached on the surface of the carrier 1 to form a biological membrane 6, a thin water layer is arranged on the surface of the biological membrane 6 due to the adsorption effect of the biological membrane 6, the water layer is an attached water layer 4, and a flowing sewage layer 5 is arranged outside the attached water layer 4;
an aeration device is also arranged in the filter tank and is used for oxygenating;
the filtering tank is also provided with a cross flow pump which can accelerate the flow speed of the attached water layer 4, sewage flows parallel to the membrane surface of the biological membrane under the driving of the pump, and the shear force generated when the sewage flows through the membrane surface can accelerate the water body exchange between the flowing sewage layer 5 and the attached water layer 4, so that the biological membrane can be always contacted with organic matters in the sewage and can be treated in time.
The biofilm 6 includes aerobic layer microorganisms 3.
The biofilm 6 further comprises anaerobic layer microorganisms 2, the anaerobic layer microorganisms 2 are attached to the carrier 1, and the aerobic layer microorganisms 3 are attached to the anaerobic layer microorganisms 2. The carrier for microorganism growth and aggregation is arranged in the sewage filtering tank, under the condition of oxygenation, the microorganism is attached to the surface of the filler to form a biological membrane 6, when oxygenated sewage flows through the filler at a certain flow rate, the microorganism in the biological membrane 6 absorbs and decomposes organic matters in the water, so that the sewage is purified, meanwhile, the microorganism is proliferated, and the biological membrane 6 is thickened. When the biofilm 6 grows to a certain thickness, oxygen diffusing into the biofilm 6 is limited, the surface thereof is in an aerobic state, and the inner layer is in an anoxic or even anaerobic state, and finally the biofilm 6 falls off. Then, new biological films 6 continue to grow on the surface of the filler, and the process is repeated in cycles, so that the sewage is purified.
The aeration device comprises an air blower and air conveying pipelines, and the air conveying pipelines are uniformly distributed in the filter tank.
The pressure of the cross-flow pump can be adjusted, and the flow velocity of the attached water layer 4 can be adjusted by adjusting the pressure of the cross-flow pump.
The carrier 1 is one or a combination of more of ceramsite porous material, quartz sand, plastic filler, broken stone filler, activated carbon, gravel, fiber balls and zeolite.
And a back washing device is also arranged in the filter tank and is used for washing the biological membrane 6 on the carrier 1.
The biological membrane 6 is an ecological system consisting of one or more of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae.
The biomembrane sewage treatment device also comprises a sedimentation tank, wherein the sedimentation tank is arranged at the downstream of the filtering tank and is used for precipitating the water filtered by the filtering tank.
The utility model discloses in be equipped with the wrong flow pump, can promote attached water layer 4 and flow, make biomembrane 6 contact sewage at any time, promoted 6 efficiency of handling sewage of biomembrane greatly, can reduce sewage treatment's cost.
The utility model provides an it is fast that adhesion water layer 4 updates under the promotion of cross flow pump, and 4 oxygen contents of newly-formed adhesion water layer are abundant, decompose the organic matter for the good oxygen fungus in biomembrane 6 and provide sufficient raw materials to difficult formation anaerobic layer has prolonged biomembrane 6's life cycle.
The sewage treatment device in the utility model does not grow fly ash, has little smell and better sanitary condition. In the biofilm method, microorganisms are fixedly grown and can form dynamic balance with the concentration of organic matters in a medium, so that the method can be applied to the advanced treatment of low-concentration sewage. In recent years, biofilm methods for domestic and external use have been studied as a supplementary treatment for effluent from biological treatment structures. The biomembrane method is used for nitrification and denitrification of sewage containing ammonia nitrogen (including organic nitrogen) and obtains good effect.
The utility model provides a sewage treatment plant biological phase is diversified. The biofilm 6 is grown fixedly, has a condition for forming a stable ecology, and can inhabit bacteria and higher microorganisms such as nitrifying bacteria having a low proliferation rate and a long generation time, and the proliferation rate thereof is 40 to 50 times slower than that of general pseudomonas, so that a high denitrification capability can be obtained by a biofilm method. The organisms present on the biofilm 6 are species-rich compared to activated sludge, and in addition to bacteria and protozoa, fungi, algae, metazoans and macroinvertebrates, which are relatively rare in activated sludge, can be present.
The utility model discloses well biomass is many, equipment throughput is big. The biological membrane 6 has a small water content, and the biomass in unit volume can be as much as 5-20 times of that of the activated sludge sometimes, so that the filter tank has a large treatment capacity.
The utility model discloses surplus sludge's output is few. The biofilm 6 is populated with organisms with higher levels of nutrients, has a longer food chain than activated sludge, and has a smaller excess sludge than activated sludge processes. In particular, in some biofilm processes, the biofilm 6 is formed by a combination of aerobic and anaerobic layers, and anaerobic bacteria in the anaerobic layer degrade excess sludge synthesized in the aerobic process, so that the total amount of excess sludge is greatly reduced, which is very advantageous for sludge disposal.
The utility model discloses operation management is convenient. The biomembrane method does not need sludge backflow, so that the sludge amount and the sludge discharge amount do not need to be adjusted frequently, and the biomembrane method is easy to maintain and manage. The activated sludge method generally has the problem of sludge bulking, has great influence on the treatment effect and even destroys the treatment process. The biofilm method has no problem because microorganisms are fixedly grown. The mass propagation of filamentous fungi can lead to activated sludge bulking, but on the other hand, filamentous fungi have a rather strong oxidizing capacity. The biofilm method can fully utilize the advantages of the filamentous fungi to overcome the defects.
The utility model discloses the process is more stable. The fluctuation of the organic load and the hydraulic load has small influence, and the recovery is fast even if the process is greatly damaged. Due to the characteristic of fixed growth, the treatment structure can also be operated intermittently.
The utility model discloses power consumption is few. When the aeration is directly carried out under the filling material, the aeration efficiency is improved due to the re-rupture of the bubbles, and the characteristic that the anaerobic membrane does not consume oxygen is added, so the general power consumption is smaller than that of the activated sludge method.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. The biomembrane sewage treatment device is characterized by comprising a filter tank, wherein a carrier (1) is arranged in the filter tank, microorganisms are gathered and attached on the surface of the carrier (1) to form a biomembrane (6) under the condition of oxygenation, and the microorganisms in the biomembrane (6) absorb and decompose organic matters in sewage to purify the sewage; after microorganisms are gathered and attached on the surface of the carrier (1) to form a biological membrane (6), a thin water layer is arranged on the surface of the biological membrane (6) due to the adsorption effect of the biological membrane (6), the water layer is an attached water layer (4), and a flowing sewage layer (5) is arranged outside the attached water layer (4);
an aeration device is also arranged in the filtering tank and is used for oxygenation;
and a cross flow pump is also arranged in the filtering tank, and the flow speed of the attached water layer (4) can be accelerated by the cross flow pump.
2. A biofilm sewage treatment plant according to claim 1, wherein said biofilm (6) comprises aerobic layer microorganisms (3).
3. A biofilm sewage treatment plant according to claim 2, wherein said biofilm (6) further comprises anaerobic layer microorganisms (2), said anaerobic layer microorganisms (2) being attached to the carrier (1), said aerobic layer microorganisms (3) being attached to the anaerobic layer microorganisms (2).
4. The apparatus of claim 1, wherein the aeration device comprises a blower and air delivery pipes, and the air delivery pipes are uniformly distributed in the filter tank.
5. The biofilm sewage treatment device according to claim 1, wherein the pressure of the cross-flow pump is adjustable, and the flow rate of the attached water layer (4) can be adjusted by adjusting the pressure of the cross-flow pump.
6. The biofilm sewage treatment device according to claim 1, wherein the carrier (1) is one or a combination of more of ceramsite porous material, quartz sand, plastic filler, crushed stone filler, activated carbon, gravel, fiber balls and zeolite.
7. A biofilm sewage treatment plant according to claim 1, wherein a backwashing device is further provided in the filtration tank for washing the biofilm (6) on the carrier (1).
8. The biofilm sewage treatment device according to claim 1, wherein the biofilm (6) is an ecosystem consisting of one or more of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa and algae.
9. The apparatus of claim 1, further comprising a sedimentation tank disposed downstream of the filtration tank for settling the water filtered by the filtration tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920298796.1U CN209906442U (en) | 2019-03-08 | 2019-03-08 | Biological membrane sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920298796.1U CN209906442U (en) | 2019-03-08 | 2019-03-08 | Biological membrane sewage treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209906442U true CN209906442U (en) | 2020-01-07 |
Family
ID=69031834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920298796.1U Active CN209906442U (en) | 2019-03-08 | 2019-03-08 | Biological membrane sewage treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209906442U (en) |
-
2019
- 2019-03-08 CN CN201920298796.1U patent/CN209906442U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101691547B (en) | Method for restoring micro-scale polluted reservoir water by using situ bio-contact oxidation | |
| CN105236564B (en) | A kind of BAF combined stuffing and application | |
| CN205170617U (en) | Combined type treatment of domestic sewage integration equipment | |
| CN101318758A (en) | Air-float and bio-filter combined water treatment process | |
| CN102489156B (en) | Bio-carbon-fiber flat membrane component and sewage treatment reactor | |
| CN106430845A (en) | Kitchen garbage wastewater treatment apparatus | |
| CN218910039U (en) | Efficient mud membrane symbiotic denitrification and dephosphorization sewage treatment system | |
| CN206692513U (en) | A kind of dyeing waste water denitrogenation processing system based on MBBR techniques | |
| CN102101719A (en) | Integral MBR sewage treating and recycling method and treatment device | |
| CN106904743A (en) | A kind of water-treatment biological membrane reactor | |
| CN208071544U (en) | A kind of railway communication system production wastewater treatment system | |
| CN209906442U (en) | Biological membrane sewage treatment device | |
| CN111018101A (en) | Membrane biofilm culture domestication process and membrane biofilm reaction device for treating high-salinity wastewater | |
| CN115520961A (en) | Diatomite reinforcement-based high ammonia nitrogen wastewater nitrosation treatment method | |
| CN109231712A (en) | A kind of A2O2The micro-integrated sewage disposal device of+Anammox and sewage water treatment method | |
| CN111689640A (en) | Sewage treatment method | |
| Visvanathan et al. | Study on aerated biofilter process under high temperature conditions | |
| CN105174653A (en) | Sewage treatment process and sewage treatment system for garbage landfill | |
| CN212609798U (en) | MBBR suspended biological filler | |
| CN211814035U (en) | Integrated sewage treatment equipment | |
| CN207418387U (en) | A kind of town domestic sewage treatment device | |
| KR100510975B1 (en) | Advanced wastewater and sewage teratment method using intermittent aeration process teratm with granular mediate | |
| CN219429820U (en) | Combined equipment for sewage treatment | |
| CN103253769A (en) | Automatic aeration-type biological membrane transfer device | |
| CN113772890B (en) | Sewage treatment system and treatment method based on AO-MBBR-inductively coupled filter tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |