CN102992538B - Liquamatic biological rotating disc reaction tank and biological rotating disc treating system - Google Patents
Liquamatic biological rotating disc reaction tank and biological rotating disc treating system Download PDFInfo
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- CN102992538B CN102992538B CN201210317038.2A CN201210317038A CN102992538B CN 102992538 B CN102992538 B CN 102992538B CN 201210317038 A CN201210317038 A CN 201210317038A CN 102992538 B CN102992538 B CN 102992538B
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- water
- reaction tank
- water inlet
- biological
- rotating disc
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 186
- 239000010865 sewage Substances 0.000 claims abstract description 48
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000004062 sedimentation Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 3
- 238000011282 treatment Methods 0.000 abstract description 22
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 2
- 238000005507 spraying Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a liquamatic biological rotating disc reaction tank, and belongs to the field of sewage treatment. The liquamatic biological rotating disc reaction tank comprises a biological rotating disc, a rotary shaft, a contact reaction groove, a jet-flow water feeder, a water feeding pipe, a sewage pump, a water-feeding adjusting valve, a water discharging groove, a water absorbing pipe and a water feeding groove, wherein the biological rotating disc is movably arranged in the contact reaction groove by a rotating shaft; baffles are arranged at the periphery of the biological rotating disc; the jet-flow water feeder is arranged in the contact reaction groove, and a water spraying port of the jet-flow water feeder faces to the baffles arranged at the periphery of the biological rotating disc; the jet-flow water feeder is connected with the sewage pump through the water feeding groove and the water-feeding adjusting valve; the sewage pump is connected with the water feeding groove by a water suctioning pipe; and the contact reaction groove is provided with the water discharging groove. The liquamatic biological rotating disc reaction tank disclosed by the invention has the advantages that by matching of the jet-flow water feeder, the water feeding pipe and the sewage pump, a jet-flow water feeding path is formed, so that the sewage can be utilized for driving the biological rotating disc to rotate; and since the water feeding pipe is provided with the water-feeding adjusting valve, the rotating speed of the biological rotating disc can be controlled by a mode of adjusting the water-feeding flow; and the energy consumption is low and the control is easy.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a hydraulically-driven biological rotating disc reaction tank and a biological rotating disc treatment system.
Background
Since the beginning of the 20 th century and since the beginning of germany, the biological rotating disk treatment process system is widely applied to sewage treatment due to the characteristics of low energy consumption, high treatment efficiency, impact resistance, convenience in maintenance and the like. The energy saving and operation mode of the system is continuously improved, but the system also has defects. The hydrodynamic biological rotating disc multi-stage biological sewage treatment process (patent CN 1057040A) adopts sewage in a high-level water tank as power to drive a water turbine, the water turbine drives a biological rotating disc, and the hydrodynamic biological rotating disc multi-stage biological rotating disc sewage treatment process has the defects that the rotating speed of the biological rotating disc is difficult to adjust, the rotating friction resistance is large, and the sewage power allocation of the multi-stage biological rotating disc is difficult. The gravity flow type biological rotating disc (patent CN 201793420U) adopts gravity flow sewage to drive the biological rotating disc to rotate, the water tanks are connected in series at the head in a ladder shape, the occupied area and the occupied space exist, the sewage gravity flow is limited by the type of filler, and the rotating speed of the biological rotating disc can not be adjusted.
Disclosure of Invention
The embodiment of the invention provides a hydraulically-driven biological rotating disk reaction tank and a biological rotating disk treatment system, which can solve the problem that the rotating speed of a biological rotating disk in the conventional biological rotating disk treatment process system is difficult to adjust. The rotating speed of the biological rotating disk can be conveniently adjusted in a mode of driving the biological rotating disk to rotate by water power.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention provides a hydraulically-driven biological rotating disc reaction tank, which comprises:
the biological rotating disc, a rotating shaft, a contact reaction tank, a jet water inlet device, a water inlet pipe, a sewage pump, a water inlet regulating valve, a water outlet tank, a water suction pipe and a water inlet tank; wherein,
the biological rotating disc is movably arranged in the contact reaction tank through the rotating shaft;
a baffle plate is arranged on the periphery of the biological rotating disk;
the jet water inlet device is arranged in the contact reaction tank, and a water spray port of the jet water inlet device faces to a baffle plate arranged on the periphery of the biological rotating disk;
the jet flow water inlet device is connected with the sewage pump through a water inlet pipe and a water inlet regulating valve, and the sewage pump is connected with the water inlet tank for providing sewage through a water suction pipe;
the contact reaction tank is provided with the water outlet tank.
The embodiment of the invention also provides a biological rotating disc processing system
The device comprises a pretreatment unit, a biological rotating disc reaction tank and a secondary sedimentation tank unit; wherein,
the pretreatment unit is sequentially connected with the biological rotating disc reaction tank and the secondary sedimentation tank unit;
the biological rotating disc reaction tank is driven by water power.
According to the technical scheme, the hydraulic drive biological rotating disc reaction tank provided by the embodiment of the invention forms a jet flow water inlet passage by matching the jet flow water inlet device, the water inlet pipe and the sewage pump, so that sewage can be used for driving the biological rotating disc to rotate, and the water inlet regulating valve is arranged on the water inlet pipe, so that the rotating speed of the biological rotating disc can be conveniently controlled by regulating the water inlet flow. The reaction tank has the advantages of simple structure, low energy consumption, easy control and convenient maintenance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of a biological rotating disk reaction tank provided by an embodiment of the invention;
fig. 2 is a schematic diagram of a bio-disc processing system according to an embodiment of the present invention.
In fig. 1, the reference numerals are: 4, a water inlet groove; 5-siphon water inlet; 6-porous water distribution plate; 7-biological rotating disc; 8-a rotating shaft; 9-a baffle plate; 10-jet water inlet device; 11-a water outlet groove; 12-a contact reaction tank; 13-a sewage pump; 14-a suction pipe; 15-water inlet pipe; 16-water inlet regulating valve; 17-water absorption regulating valve; a-direction of rotation;
in fig. 2, the reference numerals are: 1-pretreatment unit; 2-biological rotating disc reaction tank; 3-secondary sedimentation tank unit.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The embodiment of the invention provides a hydraulically-driven biological rotating disc reaction tank, which comprises the following components in percentage by weight as shown in figure 1: the biological rotating disc 7, a rotating shaft 8, a contact reaction tank 12, a jet water inlet device 10, a water inlet pipe 15, a sewage pump 13 and a water inlet regulating valve 16;
wherein, the biological rotating disc 7 is movably arranged in the contact reaction tank 12 through the rotating shaft 8;
a baffle plate 9 is arranged on the periphery of the biological rotating disk 7;
the jet water inlet device 10 is arranged in the contact reaction tank 12, and the water spray nozzle of the jet water inlet device 10 faces to the baffle plate 9 arranged on the periphery of the biological rotating disk 7;
the jet water inlet device 10 is connected with a sewage pump 13 through a water inlet pipe 15 and a water inlet regulating valve 16;
the sewage pump 13 is connected with the water inlet tank 4 for providing sewage through the water suction pipe 14;
the contact reaction tank 12 is provided with a water outlet tank 11.
In the biological rotating disk reaction tank, a plurality of baffles 9 are arranged on the periphery of the biological rotating disk 7 and are uniformly distributed on the periphery of the biological rotating disk 9, and each baffle inclines by 50-70 degrees towards the opposite direction of the rotation of the biological rotating disk (A in figure 1 is the rotation direction of the biological rotating disk 7); the arrangement of the plurality of baffles on the periphery of the biological rotating disk can be specifically as follows: and arranging a baffle plate along the periphery of the biological rotating disk every 1-5 cm of arc length.
In the above-mentioned rotating biological disk reaction tank, efflux water intake 10 sets up in contact reaction tank 12 bottom, establishes in one side of rotating biological disk 7, and the water jet of efflux water intake 10 is in the plate washer below that the rotating biological disk periphery set up, and the water jet upwards towards plate washer 9 that the rotating biological disk 7 periphery set up, and the direct efflux of the sewage of water jet spun is to plate washer 9 on to drive the disc of rotating biological disk 7 at contact reaction tank 12 internal rotation.
In the biological rotating disc reaction tank, a water inlet tank 4 is arranged on the outer wall of a contact reaction tank 12, and a sewage pump 13 is connected with the water inlet tank 4 through a water suction pipe 14; further, the following steps can be also provided: siphon water inlet 5, siphon water inlet 5 set up in the one side that contact reaction tank 12 is connected to intake chamber 4, and siphon water inlet 5 communicates with intake chamber 4 and contact reaction tank 12 respectively. Thus, the siphon water inlet 5 and the water inlet tank 4 are connected to form a second water inlet path to the contact reaction tank 14, so that water can be fed into the contact reaction tank 12 in a siphon manner. The first water inlet passage formed by the jet water inlet device 10 and the water inlet pipe 15 is matched, so that the contact reaction tank 12 can form better circulation, and the biological rotating disc 7 can be better driven to rotate in the contact reaction tank 12.
The biological rotating disc reaction tank can also be provided with: the porous water distribution plate 6 is arranged on the inner wall of the contact reaction tank 12 right below the siphon water inlet 5; the porous water distribution plate 6 can separate sewage discharged from the siphon water inlet 5. Thus, the water discharged from the siphon water inlet 5 impacts the porous water distribution plate 6, is transformed into fine water drops and then falls into the contact reaction tank 12, and the dissolved oxygen content of the sewage is increased.
The biological rotating disk reaction tank can also be provided with a water absorption regulating valve 17 which is arranged on the water absorption pipe 14, and the water flow of a second water inlet passage formed by connecting the siphon water inlet 5 and the water inlet tank 4 can be regulated through the water absorption regulating valve 17.
In the biological rotating disk reaction tank, a siphon water inlet 5 is arranged at the upper part of a contact reaction tank 12 and is arranged at the other side of a biological rotating disk 7 opposite to a jet flow water inlet device 10. Namely, the siphon water inlet 5 and the jet water inlet 10 are respectively arranged at two sides of the biological rotating disk 7 in the contact reaction tank 12, the jet water inlet 10 is arranged at the side lower part of the biological rotating disk 7, and the position of the siphon water inlet 5 is higher than the central axis of the biological rotating disk, thus forming high-level siphon to feed water into the contact reaction tank 12.
In the biological rotating disk reaction tank, the contact reaction tank 12 can be rectangular or semicircular, and the biological rotating disk 7 in the contact reaction tank 12 can be made of light materials.
According to the biological rotating disc reaction tank provided by the embodiment of the invention, the biological rotating disc is driven to rotate through the flow of water, so that the energy is saved, the rotating speed of the disc can be adjusted through the change of jet flow, the operation is simple and convenient, and the maintenance is convenient; can be conveniently combined into a multi-stage treatment process; secondary BOD5The removal rate is more than 83 percent, and the treatment effect is good.
In view of the above-mentioned bio-disc reaction tank, an embodiment of the present invention further provides a bio-disc processing system, as shown in fig. 2, including: the device comprises a pretreatment unit 1, a biological rotating disc reaction tank 2 and a secondary sedimentation tank unit 3;
wherein, the pretreatment unit 1 is connected with a biological rotating disc reaction tank 2 and a secondary sedimentation tank unit 3 in sequence;
the biological rotating disc reaction tank 2 adopts the hydraulic driven biological rotating disc reaction tank. In the system, the pretreatment unit can comprise a grit chamber and a sedimentation tank; the water inlet of the biological rotating disc reaction tank can be divided into two paths, one path is high-level siphon water inlet, the other path is upward jet water inlet from the bottom of the contact reaction tank, and the two paths of water inlet enable sewage in the contact reaction tank to form circulation and drive the biological rotating disc to rotate. Meanwhile, if the porous water distribution plate is arranged below the high-level siphon water inlet, the inlet water impacts on the porous water distribution plate, the transfer efficiency of oxygen in raw water and air can be improved, and the dissolved oxygen content of sewage is increased.
According to the biological rotating disk treatment system, the biological rotating disk reaction tank utilizes two paths of water inlet, and the rotation of the disks of the biological rotating disk is driven by water power, so that the energy is saved, meanwhile, the dissolved oxygen of sewage is increased, the sewage treatment effect is improved, and the sewage treatment requirement can be met.
The above-described bio-disc processing system will be further described with reference to specific embodiments.
The biological rotating disc treatment system provided by the embodiment of the invention is formed by sequentially connecting a pretreatment unit 1, a biological rotating disc reaction tank 2 and a secondary sedimentation tank unit 3; the biological rotating disc reaction tank 2 is a main treatment unit, effluent from the pretreatment unit 1 is output to the biological rotating disc reaction tank 2 through two water inlet passages by a sewage pump 13, one water inlet passage is a water inlet passage formed by turning the top of the contact reaction tank 12 into the contact reaction tank 12 through a water inlet pipe 15 and a water inlet regulating valve 16 arranged on the water inlet pipe, and is connected with a jet flow water outlet device 10 at the bottom of the contact reaction tank 12, and the other water inlet passage is a second water inlet passage formed by connecting the water inlet tank 4 with a siphon water inlet 5 on the water inlet tank.
In the above-mentioned biological rotating disk reaction tank 2, biological rotating disk 7 sets up in contact reaction tank 12 through pivot 8, can rotate in contact reaction tank 12, sets up baffle 9 along biological rotating disk 7 external diameter periphery, and the clockwise contained angle of baffle 9 and disk 7 is 50~70 degrees.
In the second water inlet passage, the high-level siphon can realize continuous siphon water inlet through a plurality of parallel water inlet grooves 4 and siphon water inlets 5.
The contact reaction tank 12 of the biological rotating disc reaction tank 2 is provided with a water outlet tank 11, and the treated water enters the water outlet tank 11 through a water outlet weir and enters the secondary sedimentation tank unit through the water outlet tank 11.
The working process of the sewage treatment of the biological rotating disc treatment system is as follows:
the sewage is subjected to primary treatment by the pretreatment unit 1 and is lifted by the sewage pump 13 and divided into two paths: one path of the water flows to the water inlet tank 4 through the water suction pipe 14, the water suction regulating valve 17 is arranged on the water suction pipe 14 to regulate the flow, when the water level in the water inlet tank 4 exceeds the top end of the siphon water inlet 5, siphon is formed, the sewage in the water inlet tank 4 enters the contact reaction tank 12 in a siphon mode, the outlet water of the siphon water inlet pipe 5 impacts the porous water distribution plate 6 to form fine water drops, and then the fine water drops fall into the contact reaction tank 12, so that the dissolved oxygen content of the sewage is increased; the other path of sewage flows into the contact reaction tank 12 from the top through the water inlet pipe 15 and is connected with the jet flow water outlet device 10, the water inlet adjusting valve 16 is arranged on the water inlet pipe 15 to adjust the flow, the two paths of water flows drive the biological rotating disc 7 to rotate anticlockwise around the rotating shaft 8, the reciprocating rotation of the biological rotating disc 7 meets the biological growth on the disc of the biological rotating disc 7, the biological purification process of the sewage is completed, the purified sewage flows into the secondary sedimentation tank 3 through the water outlet tank 11, and the wastewater meeting the sewage discharge standard is discharged.
In the embodiment of the invention, each unit can be manufactured into process systems with different treatment capacities, and can adapt to different sewage qualities. The rotating speed of the disc can be adjusted by the biological rotating disc reaction tank through changing the flow speed and flow of jet flow; and can conveniently combine a multi-stage treatment process according to the treatment requirements, and has the advantages of simple structure, convenient operation and convenient maintenance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A hydraulically driven biological rotating disc reaction tank is characterized by comprising:
the biological rotating disc, a rotating shaft, a contact reaction tank, a jet water inlet device, a water inlet pipe, a sewage pump, a water inlet regulating valve, a water outlet tank, a water suction pipe and a water inlet tank; wherein,
the biological rotating disc is movably arranged in the contact reaction tank through the rotating shaft;
a baffle plate is arranged on the periphery of the biological rotating disk;
the jet water inlet device is arranged in the contact reaction tank, and a water spray port of the jet water inlet device faces to a baffle plate arranged on the periphery of the biological rotating disk;
the jet flow water inlet device is connected with the sewage pump through a water inlet pipe and a water inlet regulating valve, and the sewage pump is connected with the water inlet tank through a water suction pipe;
the contact reaction tank is provided with the water outlet tank, and the water inlet tank is arranged on the outer wall of the contact reaction tank;
further comprising: the siphon water inlet is arranged on one side of the water inlet tank connected with the contact reaction tank, and is respectively communicated with the water inlet tank and the contact reaction tank; the porous water distribution plate is arranged on the inner wall of the contact reaction tank right below the siphon water inlet.
2. The rotating biological disk reaction tank as claimed in claim 1, wherein the baffles are uniformly distributed on the periphery of the rotating biological disk, and each baffle is inclined at an angle of 50-70 degrees to the opposite direction of the rotation of the rotating biological disk.
3. The rotating biological disk reaction cell of claim 1, wherein the plurality of baffles are disposed on the outer periphery of the rotating biological disk: and arranging a baffle plate along the periphery of the biological rotating disk every 1-5 cm of arc length.
4. The rotating biological disk reaction tank as claimed in claim 1, wherein the jet water inlet device is disposed at the bottom of the contact reaction tank and at one side of the rotating biological disk, and the water jet of the jet water inlet device is located below the baffle plate disposed at the periphery of the rotating biological disk and the water jet is directed upward toward the baffle plate disposed at the periphery of the rotating biological disk.
5. The rotating biological disk reaction cell of claim 5, further comprising: and the water absorption regulating valve is arranged on the water absorption pipe.
6. The rotating biological disk reaction tank as claimed in claim 5, wherein the siphon water inlet is arranged at the upper part of the contact reaction tank and at the other side of the rotating biological disk corresponding to the jet water inlet device.
7. The rotating biological disk reaction cell according to claim 1, wherein the contact reaction tank is rectangular or semicircular.
8. A rotating biological disk processing system, comprising:
the device comprises a pretreatment unit, a biological rotating disc reaction tank and a secondary sedimentation tank unit; wherein,
the pretreatment unit is sequentially connected with the biological rotating disc reaction tank and the secondary sedimentation tank unit;
the biological rotating disc reaction tank adopts the hydraulically driven biological rotating disc reaction tank as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317038.2A CN102992538B (en) | 2012-08-30 | 2012-08-30 | Liquamatic biological rotating disc reaction tank and biological rotating disc treating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317038.2A CN102992538B (en) | 2012-08-30 | 2012-08-30 | Liquamatic biological rotating disc reaction tank and biological rotating disc treating system |
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| Publication Number | Publication Date |
|---|---|
| CN102992538A CN102992538A (en) | 2013-03-27 |
| CN102992538B true CN102992538B (en) | 2014-06-04 |
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| CN201210317038.2A Expired - Fee Related CN102992538B (en) | 2012-08-30 | 2012-08-30 | Liquamatic biological rotating disc reaction tank and biological rotating disc treating system |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523904B (en) * | 2013-09-29 | 2015-04-22 | 北京桑德环境工程有限公司 | Liquid level adjustable type biological rotating disc system |
| CN103771660B (en) * | 2014-01-16 | 2015-08-26 | 江苏大学 | A kind of rural domestic sewage treatment system |
| CN103864215B (en) * | 2014-04-07 | 2016-01-20 | 葛洲坝集团第一工程有限公司 | A kind of Sewage treatment systems |
| CN104071893A (en) * | 2014-07-30 | 2014-10-01 | 宗少华 | Circulating process for treating sewage by high density activated sludge process |
| CN104355399A (en) * | 2014-11-13 | 2015-02-18 | 东南大学 | Drop-aeration self-driven biological rotating disc |
| CN105948385A (en) * | 2016-05-22 | 2016-09-21 | 中山市捷信科技服务有限公司 | Medical sewage treatment device |
| CN111039406A (en) * | 2019-12-30 | 2020-04-21 | 江苏汇合环保科技有限公司 | Domestic sewage treatment system with biological rotating disc integrated with denitrification and dephosphorization and treatment process thereof |
| CN113354192A (en) * | 2021-05-31 | 2021-09-07 | 江苏康源环保科技有限公司 | Urban domestic sewage combined biological nitrogen and phosphorus removal device and method |
| CN113402016B (en) * | 2021-06-22 | 2022-12-13 | 江西省科学院能源研究所 | Contact reaction tank of sewage treatment biological rotating disc reactor |
| CN115594275B (en) * | 2022-12-15 | 2023-04-28 | 四川省生态环境科学研究院 | Rural domestic sewage treatment device and application method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570260Y (en) * | 2002-09-26 | 2003-09-03 | 华南理工大学 | Sewage treatment combination fixture |
| CN202717676U (en) * | 2012-08-30 | 2013-02-06 | 北京建筑工程学院 | Hydraulic-driven biological rotary disk reaction pool and biological rotary disk treatment system |
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- 2012-08-30 CN CN201210317038.2A patent/CN102992538B/en not_active Expired - Fee Related
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