CN221051679U - Double-reverse biological membrane sewage treatment device - Google Patents
Double-reverse biological membrane sewage treatment device Download PDFInfo
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- CN221051679U CN221051679U CN202322658722.3U CN202322658722U CN221051679U CN 221051679 U CN221051679 U CN 221051679U CN 202322658722 U CN202322658722 U CN 202322658722U CN 221051679 U CN221051679 U CN 221051679U
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- sewage treatment
- anoxic
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- 239000010865 sewage Substances 0.000 title claims abstract description 23
- 239000012528 membrane Substances 0.000 title claims description 24
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 10
- 238000004062 sedimentation Methods 0.000 claims abstract description 8
- 230000000813 microbial effect Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000009977 dual effect Effects 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 19
- 238000005273 aeration Methods 0.000 abstract description 8
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 244000005700 microbiome Species 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 241001052560 Thallis Species 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a double-reverse biomembrane sewage treatment device, which is characterized in that: the anaerobic treatment device comprises an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially connected, wherein a reverse biological film is arranged in the anoxic tank, and the reverse biological film comprises a breathable hydrophobic film and a microbial film which is attached to the surface of the breathable hydrophobic film; the volume of the anoxic tank is larger than that of the aerobic tank. The method has the characteristics of high oxygen utilization rate, high pollutant mass transfer and removal efficiency and the like, and is small in aeration quantity, low in energy consumption and convenient to manage.
Description
Technical Field
The utility model relates to the technical field of water treatment, in particular to a double-reverse biological membrane sewage treatment device.
Background
At present, the sewage treatment capability of villages and towns is insufficient, and the current situation is optimistic.
The main problems of the current village sewage treatment are as follows:
1. The total standard reaching rate is not high. The main standard exceeding index TN is mainly caused by unbalanced C/N ratio of inflow water, the total nitrogen of inflow water is higher, and the average value of TN is 37.9mg/L.
2. The COD/TN in the domestic sewage of villages and towns is lower, and the average value of the COD/TN of the inlet water of the sewage treatment plant of the villages and towns is 4.1, and the minimum value can reach 0.5 through research.
3. The process operation management requirement is high. The AO and AAO are mainly used, the automation degree is low, and the field management requirement is high.
Wherein the AO treatment process is also called an anaerobic-aerobic process. The method is mainly used for denitrification, dephosphorization and organic matters in water removal. The AO treatment applies anaerobic hydrolysis technology to the pretreatment of activated sludge, can degrade organic pollutants and has certain denitrification and dephosphorization functions. Traditional biological denitrification (AO) is realized by autotrophic bacteria nitrification-heterotrophic bacteria denitrification, a certain carbon source is needed for completing the denitrification process, and generally COD/TN ranges from 8 to 15, so that a better denitrification effect can be achieved. In the traditional AO treatment process, the volume ratio of the anoxic tank to the aerobic tank is 3:7, the volume of the aerobic tank is large, the aeration energy consumption is high, the mixed liquor reflux ratio is generally 100-400%, the automation degree is low, and the management difficulty is high.
The utility model aims at seeking a village and town sewage treatment system with simple process operation management, good total nitrogen removal effect and low operation cost.
Disclosure of utility model
The utility model aims to provide a double-reverse biological membrane sewage treatment device which has the characteristics of high oxygen utilization rate, high pollutant mass transfer and removal efficiency and the like, and is small in aeration quantity, low in energy consumption and convenient to manage.
The utility model adopts the technical scheme that: a double reverse biomembrane sewage treatment device is characterized in that: the anaerobic treatment device comprises an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially connected, wherein a reverse biological film is arranged in the anoxic tank, and the reverse biological film comprises a breathable hydrophobic film and a microbial film which is attached to the surface of the breathable hydrophobic film; the volume of the anoxic tank is larger than that of the aerobic tank.
In the scheme, the method comprises the following steps: the volume ratio of the anoxic tank to the aerobic tank is 6-8: 4 to 2. The capacity of the traditional anoxic tank and the aerobic tank is generally 3:7, the anoxic tank and the aerobic tank of the technology have the volume of (6-8): (4-2), namely the pool capacity of the aerobic pool is small, and the aeration quantity is correspondingly reduced.
In the scheme, the method comprises the following steps: the aerobic tank is provided with a mixed liquor return pipe connected with the anoxic tank.
In the scheme, the method comprises the following steps: the width-depth ratio of the anoxic tank, the aerobic tank and the sedimentation tank is 5:7. The ratio of the membrane area of the reverse biological membrane to the cell volume is 10-50m 2 membrane area/1 m 3 anoxic cell volume.
In the scheme, the method comprises the following steps: the anoxic tank is provided with a water inlet pipe, and a mud discharge pipe of the sedimentation tank is divided into a branch pipe which is connected with the water inlet pipe or the front end of the anoxic tank.
The membrane is attached to the surface of the breathable hydrophobic membrane, when sewage flows around the breathable hydrophobic membrane assembly, pollutants in the water body enter the biological membrane under the actions of concentration difference driving, microorganism adsorption and the like, and are utilized by microorganisms through biological metabolism and proliferation, so that the pollutants in the water body are assimilated into microorganism thalli to be fixed on the biological membrane or decomposed into inorganic metabolites, and the water body is purified. Oxygen and pollutants are respectively transferred and consumed into the biological membrane at two sides of the biological membrane, and the oxygen and the pollutants are subjected to opposite mass transfer, so that the oxygen utilization rate is high. The inner layer of the biological membrane is an aerobic environment, and the outer layer is an anaerobic/anoxic environment, so that the nitrification and denitrification processes are synchronously realized. Oxygen is transferred through the hollow fiber membrane, no bubble exists in the transfer process, and the efficiency is high. The double reverse biological film has the structure opposite to that of the conventional biological film, and the reverse biological film is placed in an anoxic tank, so that organic matters in sewage are fully utilized, and no additional carbon source is required to be added. The volume of the aerobic tank is reduced, the aeration quantity is greatly reduced, and the aeration energy consumption is low. And the inventive membrane does not require backwashing. The double reverse membrane biological system is used for treating rural domestic sewage with low C/N ratio, and the removal efficiency of COD is more than 90%; the removal efficiency of TN reaches more than 73%; the removal efficiency of NH 3 -N is 97% or more. The effluent reaches the first grade A standard of sewage discharge. The invention has low human intervention degree and low requirement on the specialization degree of operators. The double reverse biological film process system performs pilot-scale experiments with low human intervention operation under the condition of keeping the original design parameters of the original traditional AO process device, and the result shows that the removal rate of pollutants is stable.
Drawings
Fig. 1 is a process flow diagram of the present utility model.
Fig. 2 is a schematic diagram of reverse biofilm operation.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
As shown in figures 1-2, the double reverse biological film sewage treatment device consists of an anoxic tank 1, an aerobic tank 2 and a sedimentation tank 3 which are sequentially connected, wherein a reverse biological film is arranged in the anoxic tank 1, and the reverse biological film comprises a breathable hydrophobic film 4 and a microbial film 5 which is attached to and grows on the surface of the breathable hydrophobic film. The volume of the anoxic tank 1 is larger than that of the aerobic tank 2. The volume ratio of the specific anoxic tank to the aerobic tank is 6-8: 4 to 2, preferably 7:3. The ratio of the membrane area of the reverse biofilm to the cell volume is 10-50m 2 membrane area/1 m 3 anoxic cell volume. The aerobic tank 2 is provided with a mixed liquor return pipe 201 which is connected with the anoxic tank 1. The anoxic tank 1 is provided with a water inlet pipe, and a mud discharge pipe of the sedimentation tank 3 is divided into a branch pipe which is connected with the water inlet pipe or the front end of the anoxic tank 1.
The C/N ratio of the inlet water is respectively 4.5, 6.6, 5.59 and 4.9, the COD removal rate of the four groups of inlet water is respectively 91.4%, 93.6%, 92.3% and 92%, and the total nitrogen removal rate is respectively: 86.9%, 78%, 74%, 79.9%. Can reach the first grade A standard of urban domestic sewage.
Take a sewage plant of 100 tons/day as an example. The daily power consumption of the traditional process is about 30KWh, and the power consumption of the fan is about 15KWh. Due to the technical characteristics of the double reverse membrane biotechnology, the daily power consumption is only about 21KWh, and the energy consumption is reduced by about 30 percent. Wherein the aeration energy consumption is reduced by 47 percent.
| Type of process | Power consumption (KW h) | Aeration power consumption (KW h) |
| Traditional AO process | 30 | 15 |
| Double reverse biomembrane process | 21 | 7 |
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A double reverse biomembrane sewage treatment device is characterized in that: the anaerobic treatment device comprises an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially connected, wherein a reverse biological film is arranged in the anoxic tank, and the reverse biological film comprises a breathable hydrophobic film and a microbial film which is attached to the surface of the breathable hydrophobic film; the volume of the anoxic tank is larger than that of the aerobic tank.
2. The dual reverse biofilm sewage treatment device of claim 1, wherein: the volume ratio of the anoxic tank to the aerobic tank is 6-8: 4 to 2.
3. The double reverse biofilm sewage treatment device according to claim 1 or 2, wherein: the ratio of the membrane area of the reverse biological membrane to the cell volume is 10-50m 2 membrane area/1 m 3 anoxic cell volume.
4. A dual reverse biofilm sewage treatment device according to claim 3, wherein: the aerobic tank is provided with a mixed liquor return pipe connected with the anoxic tank.
5. The dual reverse biofilm sewage treatment device according to claim 4, wherein: the anoxic tank is provided with a water inlet pipe, and a mud discharge pipe of the sedimentation tank is divided into a branch pipe which is connected with the water inlet pipe or the front end of the anoxic tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322658722.3U CN221051679U (en) | 2023-09-29 | 2023-09-29 | Double-reverse biological membrane sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322658722.3U CN221051679U (en) | 2023-09-29 | 2023-09-29 | Double-reverse biological membrane sewage treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221051679U true CN221051679U (en) | 2024-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322658722.3U Active CN221051679U (en) | 2023-09-29 | 2023-09-29 | Double-reverse biological membrane sewage treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221051679U (en) |
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2023
- 2023-09-29 CN CN202322658722.3U patent/CN221051679U/en active Active
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