CN219860845U - A2O-MBR integrated low-concentration organic wastewater treatment system - Google Patents
A2O-MBR integrated low-concentration organic wastewater treatment system Download PDFInfo
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- CN219860845U CN219860845U CN202321185200.XU CN202321185200U CN219860845U CN 219860845 U CN219860845 U CN 219860845U CN 202321185200 U CN202321185200 U CN 202321185200U CN 219860845 U CN219860845 U CN 219860845U
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 27
- 230000003647 oxidation Effects 0.000 claims abstract description 76
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000010802 sludge Substances 0.000 claims abstract description 46
- 230000020477 pH reduction Effects 0.000 claims abstract description 34
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 27
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 15
- 238000010992 reflux Methods 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims abstract description 12
- 230000007062 hydrolysis Effects 0.000 claims abstract description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims description 17
- 238000005273 aeration Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- 239000012510 hollow fiber Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 8
- 238000004064 recycling Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 239000008235 industrial water Substances 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 230000001954 sterilising effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model relates to the technical field of wastewater treatment, in particular to an A2O-MBR integrated low-concentration organic wastewater treatment system. The system comprises an anaerobic tank, a hydrolytic acidification tank, a contact oxidation tank, an MBR tank and a disinfection tank which are sequentially communicated; the anaerobic tank, the hydrolytic acidification tank and the contact oxidation tank are respectively provided with a filler, a sludge reflux mechanism is arranged between the MBR tank and the anaerobic tank and between the MBR tank and the contact oxidation tank, and the anaerobic tank and the contact oxidation tank are respectively provided with a water inlet and distribution device; the hydrolysis acidification tank is provided with a water outlet overflow device. The integrated wastewater treatment device disclosed by the utility model is used for completely purifying pollutants in low-concentration organic wastewater, the whole system does not need civil construction, the equipment occupation is small, the construction period is short, the equipment investment and the operation cost are low, the operation management is simple, the equipment effluent can reach the process and product water standard in the urban wastewater recycling industrial water quality (GB/T19923-2005), the equipment effluent can be completely reused for production, and the zero emission of wastewater is truly realized.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to an A2O-MBR integrated low-concentration organic wastewater treatment system.
Background
Most of small-sized processing factories in China carry out cleaning treatment on products in the later period, and generated wastewater is always directly discharged, so that not only is certain influence on the environment brought, but also waste of water resources is brought, and the problem of water discharge of the factories becomes a survival problem of enterprises in the face of increasingly strict environmental control in China.
At present, most of domestic small-sized product processing factories produce wastewater with the volume below 10 tons/day, which is limited by factory floor and input cost, and a complete sewage treatment system is basically not provided, most of the sewage treatment systems are illegal direct drainage treatment, so that in order to solve the drainage problem of such factories, a treatment technology and equipment which are easy to operate, good in effect, small in floor area and low in cost are urgently needed.
Disclosure of Invention
In view of the problems of the prior art, the utility model aims to provide the A2O-MBR integrated low-concentration organic wastewater treatment system with small occupied area and high treatment effect, which effectively solves the technical problem of recycling the low-concentration organic wastewater after treatment and solves the problem of wastewater discharge for enterprises.
To achieve the above and other related objects, the present utility model provides an A2O-MBR integrated low-concentration organic wastewater treatment system, comprising an anaerobic tank, a hydrolytic acidification tank, a contact oxidation tank, an MBR tank and a disinfection tank which are sequentially communicated; the anaerobic tank, the hydrolytic acidification tank and the contact oxidation tank are respectively provided with a filler, a sludge reflux mechanism is arranged between the MBR tank and the anaerobic tank and between the MBR tank and the contact oxidation tank, and the anaerobic tank and the contact oxidation tank are respectively provided with a water inlet and distribution device; the hydrolysis acidification tank is provided with a water outlet overflow device.
In some embodiments of the utility model, the anaerobic tank is upper water inlet, the bottom of the anaerobic tank is communicated with the bottom of the hydrolytic acidification tank, the hydrolytic acidification tank is upper water outlet, and the top of the hydrolytic acidification tank is communicated with the contact oxidation tank.
In some embodiments of the utility model, the contact oxidation cell comprises a first contact oxidation unit and a second contact oxidation unit in communication, the top of the hydrolytic acidification cell is in communication with the top of the first contact oxidation unit, the bottom of the first contact oxidation unit is in communication with the bottom of the second contact oxidation unit, the top of the second contact oxidation unit is in communication with the top of the MBR cell, and the bottom of the MBR cell is in communication with the disinfection cell.
In some embodiments of the utility model, the sludge return mechanism is respectively communicated with the water inlet end of the anaerobic tank, the water inlet end of the contact oxidation tank and the water outlet end of the MBR tank.
In some embodiments of the utility model, the filler is a bio-rope filler.
In some embodiments of the utility model, the influent water distribution device is a water distribution triangular weir.
In some embodiments of the utility model, the effluent overflow means is a triangular weir.
In some embodiments of the utility model, the packing filling rate in the anaerobic tank, the hydrolytic acidification tank and the contact oxidation tank is 50% -80% of the effective tank capacity.
In some embodiments of the utility model, the loading on the weirs of the water distribution triangular weirs and overflow triangular weirs is 1-2L/(m.s).
In some embodiments of the utility model, the sludge reflux ratio of the MBR tank to the contact oxidation tank is 30% -50%.
In some embodiments of the utility model, an immersed MBR membrane is disposed within the MBR tank.
In some embodiments of the utility model, the MBR membrane in the MBR tank is a hollow fiber membrane made of PTFE material, and the membrane flux is 0.3m 3 /m 2 ·d-0.5m 3 /m 2 ·d。
In some embodiments of the utility model, a microporous aeration device is arranged in the contact oxidation pond, the system further comprises a device room, a fan is arranged in the device room, and the fan is communicated with the microporous aeration device.
The technical scheme has the following technical effects:
according to the utility model, through improvement of a wastewater treatment system, A2O-MBR is integrated, a biochemical and physicochemical combined process is adopted at the tail end, COD and SS which are difficult to dissolve in water can be further removed through further degradation of high-concentration sludge and filtration of a membrane, stable effluent quality is ensured, stable guarantee is provided for recycling water, the integrated wastewater treatment device is used for completely purifying pollutants in low-concentration organic wastewater, the whole system does not need civil construction, the equipment occupation is small, the construction period is short, the equipment investment and the operation cost are low, the operation management is simple, the equipment effluent can reach the process and product water standard in urban wastewater recycling industrial water quality (GB/T19923-2005), the equipment effluent can be fully recycled for production, and zero emission of wastewater is truly realized.
Drawings
FIG. 1 is a schematic diagram of an embodiment A2O-MBR integrated low-concentration organic wastewater treatment system.
The element numbers in the drawings of the present utility model:
110. anaerobic tank
120. Hydrolytic acidification tank
130. Contact oxidation pond
131. First contact oxidation unit
132. Second contact oxidation unit
140 MBR pool
150. Sterilizing pool
160. Equipment room
161. Blower fan
210. Sludge reflux mechanism
220. Water inlet and distribution device
230. Water outlet overflow device
240. Microporous aeration device
250. Packing material
Detailed Description
In the description of the present utility model, it should be noted that, the structures, proportions, sizes, etc. shown in the drawings attached to the present utility model are merely used in conjunction with the disclosure of the present utility model, and are not intended to limit the applicable limitations of the present utility model, so that any modification of the structures, variation of the proportions, or adjustment of the sizes, without affecting the efficacy and achievement of the present utility model, should fall within the scope of the disclosure of the present utility model. Also, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1, the utility model provides an A2O-MBR integrated low-concentration organic wastewater treatment system, which comprises an anaerobic tank 110, a hydrolytic acidification tank 120, a contact oxidation tank 130, an MBR tank 140 and a disinfection tank 150 which are sequentially communicated; the anaerobic tank 110, the hydrolytic acidification tank 120 and the contact oxidation tank 130 are respectively provided with a filler 250, a sludge reflux mechanism 210 is arranged between the MBR tank 140 and the anaerobic tank 110 and between the MBR tank 140 and the contact oxidation tank 130, and the anaerobic tank 110 and the contact oxidation tank 130 are respectively provided with a water inlet and distribution device 220; the hydrolytic acidification tank 120 is provided with a water outlet overflow 230. Wherein, the A2O method is also called as AAO method, is the short for the first letter of the English Anaerobic-Anoxa-oxygen (Anaerobic-Anoxic-aerobic method), and is a common sewage treatment process. The waste water treated by the A2O method is difficult to stably run because of the difficulty in system operation, and the fluctuation of effluent COD and SS is large, so that the produced water cannot stably reach the standard of reuse water, the A2O-MBR is adopted to integrate, the biochemical and physicochemical combined process is adopted at the tail end, the COD and SS which are difficult to dissolve in water can be further removed through the further degradation of high-concentration sludge and the filtration effect of a membrane, the stable effluent quality is ensured, and the stable guarantee is provided for the reuse of water.
In this embodiment, the anaerobic tank 110, the hydrolytic acidification tank 120, the contact oxidation tank 130, and the MBR tank 140 adopt plug-flow water inlet to prevent short flow. The anaerobic tank 110 is upper water inlet, the bottom of the anaerobic tank 110 is communicated with the bottom of the hydrolytic acidification tank 120, the hydrolytic acidification tank 120 is upper water outlet, and the upper part of the hydrolytic acidification tank 120 is communicated with the contact oxidation tank 130. In a specific embodiment, the contact oxidation tank 130 is provided with 2 grids, the contact oxidation tank 130 comprises a first contact oxidation unit 131 and a second contact oxidation unit 132 which are communicated, the top of the hydrolytic acidification tank 120 is communicated with the top of the first contact oxidation unit 131, the bottom of the first contact oxidation unit 131 is communicated with the bottom of the second contact oxidation unit 132, the top of the contact oxidation tank 130 is used for discharging water, namely, the top of the second contact oxidation unit 132 is communicated with the top of the MBR tank 140, the bottom of the MBR tank 140 is communicated with the disinfection tank 150, the MBR tank 140 is used for discharging water into the disinfection tank 150, and clean water is collected after ozone disinfection in the disinfection tank 150 for periodic recycling production. In this embodiment, the arrangement of the first contact oxidation unit 131 and the second contact oxidation unit 132 has the advantages that: 1. the hydraulic retention time of the contact oxidation pond is increased, so that the organic matters in the water can be further degraded; 2. the first contact oxidation unit 131 is communicated with the bottom of the second contact oxidation unit 132, and the second contact oxidation unit 132 and the MBR tank overflow water from the top, so that the sludge concentration of the MBR tank can be effectively controlled, and the biochemical efficiency is improved.
In this embodiment, the anaerobic tank 110, the hydrolytic acidification tank 120 and the contact oxidation tank 130 are all suspended with a filler 250, and the filler 250 is a biological rope filler. The filler 250 is made of elastic materials and soft materials by mixing and weaving, and the materials are reinforced PP and modified alcoholized fibers, so that the film can be quickly formed, the mass transfer effect is improved, and the impact load of the device is stronger.
In this embodiment, the filling rate of the filler 250 in the anaerobic tank 110, the hydrolytic acidification tank 120, and the contact oxidation tank 130 may be, for example, 50% -80%, 50% -70%, or 70% -80% of the effective tank volume. The effective pool volume refers to the volume of the pool which can actually store water, and because the pool is always worried about overflow when the pool is designed, the super high of 0.5m-1m can be designed, the volume of the pool is not the water storage volume in the running state, and the effective pool volume is the effective pool volume. The advantages are that: the filling rate of the filler 250 in the anaerobic tank 110, the hydrolytic acidification tank 120 and the contact oxidation tank 130 is 50-80% of the effective tank capacity, so that the mass transfer effect of water is increased, the treatment efficiency of a unit system is improved, the volume of a water tank is saved, and the impact load of the system is also improved.
In this embodiment, aeration stirring devices are arranged at the bottoms of the hydrolysis acidification tank 120 and the contact oxidation tank 130, the hydrolysis acidification tank 120 adopts a PVC perforated pipe, the contact oxidation tank 130 adopts a microporous aeration disc, the material is ABS+EPDM, the aeration pipe is connected with a fan 161, air (oxygen) is provided in the tank by the fan 161, and the fan 161 is installed in the equipment room 160.
In this embodiment, the anaerobic tank 110 and the contact oxidation tank 130 are respectively provided with a water inlet and distribution device 220, and the water inlet and distribution device 220 is a water distribution triangular weir.
In this embodiment, the hydrolysis-acidification tank 120 is provided with a water outlet overflow device 230, and the water outlet overflow device 230 is an overflow triangular weir.
In this embodiment, the load on the triangular weir for water distribution and the triangular weir for overflow is 1-2L/(m.s), 1-1.5L/(m.s), or 1.5-2L/(m.s), which has the advantage that the triangular weir for water distribution and overflow are uniform and no short flow occurs.
In this embodiment, an immersed MBR membrane is disposed in the MBR tank 140, and the MBR membrane is made of PTFE. Specifically, the MBR membrane is a hollow fiber membrane made of PTFE material, and the membrane flux is 0.3m 3 /m 2 ·d-0.5m 3 /m 2 D, so that the service life of the MBR membrane can be ensured, the normal water production of the system can be met, and the investment of equipment is saved.
The MBR membrane is made of PTFE, has the advantages of strong hydrophilicity and large flux, adopts an MBR process at the tail end, reduces the setting of a secondary sedimentation tank, saves the equipment land, simultaneously, adds a small amount of biological enzyme during the operation in the MBR tank 140, has an iodine value of 800, and further reduces the COD and chromaticity of the effluent of the MBR tank 140 after adding the biological enzyme.
In this embodiment, a sludge recirculation mechanism 210 is disposed between the MBR tank 140 and the contact oxidation tank 130, and a gas stripping type sludge recirculation mechanism is used to achieve sludge recirculation, and the sludge is recirculated to the water inlet end of the contact oxidation tank 130 for supplementing the sludge in the contact oxidation tank 130.
In this embodiment, the sludge is anaerobically digested by returning excess sludge to the anaerobic tank 110 via the sludge return mechanism 210 between the MBR tank 140 and the anaerobic tank 110. In a specific embodiment, the residual sludge generated by the biochemical system is discharged to the water inlet end of the anaerobic tank 110 by the air-lift type sludge reflux mechanism, so that the sludge is decomposed into CH by anaerobic bacteria and facultative bacteria under anaerobic condition 4 、CO 2 And H 2 And O, the mud discharge of the device is basically zero, and the operation cost is reduced.
In a specific embodiment, the sludge recirculation mechanism 210 is respectively connected to the water inlet end of the anaerobic tank 110, the water inlet end of the contact oxidation tank 130, and the water outlet end of the MBR tank 140.
In this embodiment, a control valve is disposed on a pipeline of the sludge recirculation mechanism 210 into the contact oxidation tank 130, for controlling whether the sludge is recirculated into the contact oxidation tank 130. The pipeline of the sludge reflux mechanism 210 entering the water inlet end of the anaerobic tank 110 is provided with a control valve for controlling whether the sludge enters the anaerobic tank.
In this embodiment, the sterilization tank 150 uses ozone for sterilization.
The method for treating the low-concentration organic wastewater by using the low-concentration organic wastewater treatment system comprises the following steps: the low-concentration organic wastewater is sent into a water distribution weir arranged in the anaerobic tank 110 through a water inlet pipe, then the wastewater sequentially flows through the hydrolysis acidification tank 120, the contact oxidation tank 130, the MBR tank 140 and the disinfection tank 150, sludge in the MBR tank 140 returns to the contact oxidation tank 130 through a sludge return mechanism, and residual sludge in the MBR tank 140 is periodically discharged into the anaerobic tank 110 for anaerobic digestion.
The sludge reflux ratio of the sludge reflux mechanism to the contact oxidation tank is 50%, the sludge reflux ratio refers to the sludge amount of the MBR tank to the contact oxidation tank, and the sludge reflux ratio is defined as the ratio of the returned sludge amount to the water inflow.
The sludge backflow mechanism is used for backflow to the anaerobic tank for digestion, the sludge discharge period is once a week, and the sludge discharge amount is 5% of the daily water inflow. The sludge is periodically discharged through a sludge return pipeline, and the excess sludge generated by the MBR is discharged to the water inlet end of the anaerobic tank, so that the sludge is decomposed into CH by anaerobic bacteria and facultative bacteria under the anaerobic condition 4 、CO 2 And H 2 O。
Ozone is added into the disinfection tank 150 at an amount of 5mg/L, and peculiar smell in water is removed while sterilization is performed. Examples 1,2 and 3 correspond to three sets of parallel experimental data which are simultaneously carried out under the conditions of the sludge reflux ratio, the sludge discharge period and the ozone amount.
The integrated treatment device of the example is used for treating low-concentration organic wastewater, and then various indexes of water inlet and outlet of the device are detected respectively. The test results are shown in the following table:
as can be seen from the data in the table, the low-concentration organic wastewater passes through A 2 After being treated by the O-MBR integrated low-concentration organic wastewater treatment device, the effluent is completely dischargedMeets the process and product water standards in the urban sewage recycling industrial water quality (GB/T19923-2005) and can be reused for production.
In summary, the A2O-MBR integrated low-concentration organic wastewater treatment system provided by the embodiment of the utility model ensures that the integrated wastewater treatment device completely purifies pollutants in low-concentration organic wastewater, the whole system does not need civil engineering, the equipment occupation is small, the construction period is short, the equipment investment and the running cost are low, the operation management is simple, the equipment effluent can reach the process and product water standard in the urban wastewater recycling industrial water quality (GB/T19923-2005), and the equipment effluent can be completely reused for production, thereby truly realizing zero emission of wastewater.
In conclusion, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. An A2O-MBR integrated low-concentration organic wastewater treatment system is characterized by comprising an anaerobic tank (110), a hydrolytic acidification tank (120), a contact oxidation tank (130), an MBR tank (140) and a disinfection tank (150) which are sequentially communicated; the anaerobic tank (110), the hydrolysis acidification tank (120) and the contact oxidation tank (130) are respectively provided with a filler (250), a sludge reflux mechanism (210) is arranged between the MBR tank (140) and the anaerobic tank (110) and between the MBR tank and the contact oxidation tank (130), the anaerobic tank (110) and the contact oxidation tank (130) are respectively provided with a water inlet distribution device (220), and the hydrolysis acidification tank (120) is provided with a water outlet overflow device (230).
2. The A2O-MBR integrated low-concentration organic wastewater treatment system according to claim 1, wherein the anaerobic tank (110) is upper water inlet, the bottom of the anaerobic tank (110) is communicated with the bottom of the hydrolytic acidification tank (120), the hydrolytic acidification tank (120) is upper water outlet, and the top of the hydrolytic acidification tank (120) is communicated with the contact oxidation tank (130).
3. The A2O-MBR integrated low-concentration organic wastewater treatment system of claim 2, wherein the contact oxidation tank (130) comprises a first contact oxidation unit (131) and a second contact oxidation unit (132) which are communicated, the top of the hydrolytic acidification tank (120) is communicated with the top of the first contact oxidation unit (131), the bottom of the first contact oxidation unit (131) is communicated with the bottom of the second contact oxidation unit (132), the top of the second contact oxidation unit (132) is communicated with the top of the MBR tank (140), and the bottom of the MBR tank (140) is communicated with the disinfection tank (150).
4. The A2O-MBR integrated low-concentration organic wastewater treatment system of claim 1, wherein the sludge return mechanism (210) is respectively communicated with a water inlet end of the anaerobic tank (110), a water inlet end of the contact oxidation tank (130), and a water outlet end of the MBR tank (140).
5. The A2O-MBR integrated low-concentration organic wastewater treatment system of claim 1, wherein the packing (250) is a biological rope packing;
and/or the water inlet and distribution device (220) is a water distribution triangular weir;
and/or the water outlet overflow device (230) is an overflow triangular weir.
6. The A2O-MBR integrated low-concentration organic wastewater treatment system according to claim 1, wherein the packing (250) filling rate in the anaerobic tank (110), the hydrolytic acidification tank (120) and the contact oxidation tank (130) is 50% -80% of the effective tank capacity.
7. The A2O-MBR integrated low-concentration organic wastewater treatment system according to claim 5, wherein the weir load of the water distribution triangular weir and the overflow triangular weir is 1-2L/(m·s).
8. The A2O-MBR integrated low-concentration organic wastewater treatment system of claim 1, wherein a sludge reflux ratio of the MBR tank (140) to the contact oxidation tank (130) is 30% -50%.
9. The A2O-MBR integrated low-concentration organic wastewater treatment system according to claim 1, wherein an immersed MBR membrane is arranged in the MBR tank (140);
and/or the MBR membrane in the MBR tank (140) is a hollow fiber membrane made of PTFE material, and the membrane flux is 0.3m 3 /m 2 ·d-0.5m 3 /m 2 ·d。
10. The A2O-MBR integrated low-concentration organic wastewater treatment system according to claim 1, wherein a microporous aeration device (240) is arranged in the contact oxidation tank (130), the system further comprises a device room (160), a fan (161) is arranged in the device room (160), and the fan (161) is communicated with the microporous aeration device (240).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321185200.XU CN219860845U (en) | 2023-05-16 | 2023-05-16 | A2O-MBR integrated low-concentration organic wastewater treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321185200.XU CN219860845U (en) | 2023-05-16 | 2023-05-16 | A2O-MBR integrated low-concentration organic wastewater treatment system |
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| Publication Number | Publication Date |
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| CN219860845U true CN219860845U (en) | 2023-10-20 |
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| CN202321185200.XU Active CN219860845U (en) | 2023-05-16 | 2023-05-16 | A2O-MBR integrated low-concentration organic wastewater treatment system |
Country Status (1)
| Country | Link |
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| CN (1) | CN219860845U (en) |
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2023
- 2023-05-16 CN CN202321185200.XU patent/CN219860845U/en active Active
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