CN112851042A - Automatic control device of MBR integrated sewage treatment equipment - Google Patents
Automatic control device of MBR integrated sewage treatment equipment Download PDFInfo
- Publication number
- CN112851042A CN112851042A CN202110211895.3A CN202110211895A CN112851042A CN 112851042 A CN112851042 A CN 112851042A CN 202110211895 A CN202110211895 A CN 202110211895A CN 112851042 A CN112851042 A CN 112851042A
- Authority
- CN
- China
- Prior art keywords
- purification tank
- filter membrane
- sewage treatment
- treatment equipment
- control device
- 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.)
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Links
- 239000010865 sewage Substances 0.000 title claims abstract description 32
- 238000000746 purification Methods 0.000 claims abstract description 39
- 239000012528 membrane Substances 0.000 claims abstract description 38
- 230000001681 protective effect Effects 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000010802 sludge Substances 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
-
- 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
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an automatic control device of MBR (membrane bioreactor) integrated sewage treatment equipment, which comprises a purification tank, a control assembly and a filter membrane assembly, wherein the control assembly is arranged on the outer side of the purification tank, the filter membrane assembly is arranged on the inner side of the purification tank, the control assembly comprises an alarm, a signal lamp, an operating platform and a flow monitor, the operating platform is arranged on the outer side of the purification tank, the flow monitor is arranged at the top of the filter membrane assembly, the signal lamp is arranged on the side surface of the operating platform, the alarm is arranged at the top of the operating platform, the signal lamp comprises a light-emitting plate and a lampshade provided with a plurality of annular grooves, the light-emitting plate is arranged on the side surface of the operating platform, the lampshade is arranged on; when the sewage flow through the filter membrane component descends, the light emitted by the light-emitting plate irradiates a farther place through the refraction of the annular groove to remind workers, and the problem that the workers cannot be timely informed to clean after the existing sewage treatment equipment is blocked by sludge is solved.
Description
Technical Field
The invention relates to the field of sewage treatment equipment, in particular to an automatic control device of MBR integrated sewage treatment equipment.
Background
With the rapid development of modern industry and the continuous expansion of urban scale, the water consumption and waste water quantity of cities are continuously increased, so that the water quantity of urban water sources is increasingly insufficient, the water environment is gradually deteriorated, and the water resource crisis is gradually severe. The traditional method is used for solving the problem that water pollution can not adapt to the new situation of rapid development, the membrane bioreactor is a product under the environment demand power, the biodegradation of the bioreactor and the high-efficiency separation of the membrane are integrated, and the membrane bioreactor has the unique advantages that the traditional biochemical treatment technology cannot compare with: the effluent quality is good and stable, the treatment efficiency is high, the occupied space is small, the operation is simple and convenient, and the existing sewage treatment equipment cannot inform workers to clean the sewage in time after being blocked by sludge.
Disclosure of Invention
The invention provides an automatic control device of MBR integrated sewage treatment equipment, aiming at solving the problem that workers cannot be informed to clean the sewage treatment equipment in time after the existing sewage treatment equipment is blocked by sludge.
An automatic control device of MBR integrated sewage treatment equipment is characterized by comprising a purification tank, a control component and a filter membrane component, wherein the control component is arranged on the outer side of the purification tank and fixedly connected with the purification tank, the filter membrane component is arranged on the inner side of the purification tank, the control component comprises an alarm, a signal lamp, an operation table and a flow monitor, the operation table is arranged on the outer side of the purification tank, the flow detector is arranged on the top of the filter membrane component and communicated with the filter membrane component, the flow detector, the signal lamp and the alarm are electrically connected with the operation table, the signal lamp is arranged on the side face of the operation table, the alarm is arranged on the top of the operation table, the signal lamp comprises a light-emitting plate and a lampshade with a plurality of annular grooves, and the light-emitting plate is arranged on the side face of the operation table, and with operation panel electric connection, the lamp shade set up in keeping away from of luminescent plate operation panel one side, and with luminescent plate fixed connection, a plurality of the equal pain heart of annular groove set up in the lamp shade keep away from one side of luminescent plate.
The flow monitor comprises an impeller, a rotating shaft, a shell and a rotating speed sensor, wherein the shell is arranged at the top of the filter membrane component and communicated with the filter membrane component, the rotating speed sensor is electrically connected with the operating platform, the rotating shaft penetrates through the shell, the impeller is arranged in the shell and is connected with the shell in a rotating mode through the rotating shaft, and the rotating speed sensor is arranged at one end of the rotating shaft.
Wherein, the alarm includes speaker, protective housing and base, the speaker set up in the inside of protective housing and with protective housing fixed connection, the protective housing set up in the top of base and with base fixed connection, the base set up in the top of operation panel and with operation panel fixed connection, the protective housing has resonance chamber and horn mouth, the resonance chamber set up in the inside of protective housing, the horn mouth set up in keeping away from of protective housing resonance chamber one side.
The purifying tank comprises an air pump and an air guide pipe with a plurality of air holes, the air pump is arranged on the outer side of the purifying tank, the air guide pipe is arranged at the bottom of the purifying tank, the air guide pipe penetrates through the side wall of the purifying tank and is communicated with the air pump, and the air holes are formed in the part, located on the inner side of the purifying tank, of the air guide pipe.
The filter membrane component comprises a water outlet pipe, a main flow pipe, a support and a plurality of groups of branch flow components, the top of each branch flow component is communicated with the main flow pipe, the support is arranged on the inner side of the purification tank, the main flow pipe is arranged on the top of the support, one end of the water outlet pipe is communicated with the main flow pipe, and one end of the water outlet pipe, which is far away from the main flow pipe, is communicated with the shell.
The branch assembly comprises a branch pipe and a plurality of flexible pipes with filtering holes, the top ends of the flexible pipes are communicated with the branch pipe, and the filtering holes are uniformly distributed on the peripheral side of the flexible pipes and penetrate through the flexible pipes.
The invention has the beneficial effects that: automatic monitoring passes through the sewage flow of filter membrane subassembly, when the flow descends by a wide margin, the alarm sends alarm signal and reminds the staff to troubleshoot the trouble, and the luminescent plate scintillation, the light that the luminescent plate sent make light can shine farther place through the refraction of a plurality of recess, further reminds the staff, has reduced current sewage treatment device and has failed timely clearance easily because of being blockked up the back by mud, leads to the problem that the sewage treatment ability of equipment descends.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an axial structure of the present invention.
Fig. 2 is a schematic front sectional view of the present invention.
Fig. 3 is a side sectional structural schematic view of the alarm of the present invention.
Figure 4 is a side cross-sectional structural schematic view of a signal lamp of the present invention.
10-a control component, 11-a signal lamp, 111-a lamp shade, 112-a luminous plate, 113-an annular groove, 12-an alarm, 121-a loudspeaker, 122-a protective shell, 1221-a resonance cavity, 1222-a bell mouth, 123-a base, 13-a flow monitor, 131-an impeller, 132-a shell, 133-a rotation speed sensor, 134-a rotating shaft, 14-an operation table, 20-a purification pool, 21-an air duct, 211-an air hole, 22-an air pump, 30-a filter membrane component, 31-a bracket, 32-a branch component, 321-a flexible pipe, 3211-a filter hole, 322-a branch flow pipe, 33-a water outlet pipe and 34-a main flow pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 4, the present invention provides a technical solution:
the utility model provides an MBR integration sewage treatment device's automatic control device, includes purification tank 20, control assembly 10 and filter membrane subassembly 30, control assembly 10 set up in the outside of purification tank 20 to with purification tank 20 fixed connection, filter membrane subassembly 30 sets up in the inboard of purification tank 20, control assembly 10 includes alarm 12, signal lamp 11, operation panel 14 and flow monitor 13, operation panel 14 sets up in the outside of purification tank 20, flow detector sets up in the top of filter membrane subassembly 30, and communicate with filter membrane subassembly 30, flow detector, signal lamp 11 with alarm 12 all with operation panel 14 electric connection, signal lamp 11 sets up in the side of operation panel 14, alarm 12 sets up in the top of operation panel 14, signal lamp 11 includes luminescent plate 112 and lamp shade 111 that has a plurality of annular groove 113, the luminescent plate 112 set up in the side of operation panel 14, and with operation panel 14 electric connection, lamp shade 111 set up in keeping away from of luminescent plate 112 operation panel 14 one side, and with luminescent plate 112 fixed connection, a plurality of annular groove 113 all set up with one heart in keeping away from of lamp shade 111 one side of luminescent plate 112.
In the present embodiment, the sewage to be treated flows into the purification tank 20, is biologically purified by the activated sludge in the purification tank 20, the purified water and the activated sludge are then separated by the filter membrane module 30, the control module 10 monitors the flow rate of the sewage flowing out of the filter membrane module 30 in real time through the flow rate monitor 13, when the filter membrane assembly 30 is blocked by sludge, the flow monitor 13 detects that the flow of sewage passing through the filter membrane assembly 30 is reduced, the operation table 14 sends out a command, the alarm 12 sends out an alarm signal, meanwhile, the signal lamp 11 flickers to remind the staff to check faults, light emitted by the light-emitting plate 112 penetrates through the lampshade 111 and is focused by refraction of the annular grooves 113, can irradiate farther places and remind workers in time, thereby reducing the problem that the existing sewage treatment equipment cannot inform the workers in time to clean after being blocked.
Further, the flow monitor 13 includes an impeller 131, a rotating shaft 134, a housing 132 and a rotation speed sensor 133, the housing 132 is disposed on the top of the filter membrane assembly 30 and is communicated with the filter membrane assembly 30, the rotation speed sensor 133 is electrically connected to the console 14, the rotating shaft 134 penetrates through the housing 132, the impeller 131 is disposed inside the housing 132 and is rotatably connected to the housing 132 through the rotating shaft 134, and the rotation speed sensor 133 is disposed at one end of the rotating shaft 134.
In this embodiment, the sewage filtered by the filter membrane assembly 30 flows in the housing 132, and drives the impeller 131 and the rotating shaft 134 to rotate simultaneously, and the rotation speed sensor 133 detects the rotation speed of the rotating shaft 134, so as to measure the flow rate of the sewage passing through the flow monitor 13 per unit time.
Further, the alarm 12 includes a speaker 121, a protective shell 122 and a base 123, the speaker 121 is disposed inside the protective shell 122 and fixedly connected to the protective shell 122, the protective shell 122 is disposed on the top of the base 123 and fixedly connected to the base 123, the base 123 is disposed on the top of the console 14 and fixedly connected to the console 14, the protective shell 122 has a resonance cavity 1221 and a bell 1222, the resonance cavity 1221 is disposed inside the protective shell 122, and the bell 1222 is disposed on a side of the protective shell 122 away from the resonance cavity 1221.
In this embodiment, the alarm sound emitted from the speaker 121 is amplified after resonating with the protective casing 122 through the resonance cavity 1221 inside the protective casing 122, so that the sound can be transmitted to a further place, and the sound generator is fixedly connected to the console 14 by the base 123.
Further, purification tank 20 includes air pump 22 and the air duct 21 that has a plurality of gas hole 211, air pump 22 set up in the outside of purification tank 20, air duct 21 set up in the bottom of purification tank 20, just air duct 21 runs through the lateral wall of purification tank 20 with air pump 22 intercommunication, a plurality of gas hole 211 all set up in air duct 21 is located the inboard part of purification tank 20.
In this embodiment, a large amount of air is delivered to the interior of the purification tank 20 along the air duct 21 by the air pump 22, and is ejected from the plurality of air holes 211 to provide oxygen to be consumed in purifying the sewage for the activated sludge in the purification tank 20, and the activated sludge attached to the filter membrane assembly 30 is shaken to prevent the activated sludge from blocking the filter membrane assembly 30.
Further, the filter membrane assembly 30 includes a water outlet pipe 33, a main flow pipe 34, a support 31 and a plurality of sets of branch flow assemblies 32, the top of each branch flow assembly 32 is communicated with the main flow pipe 34, the support 31 is disposed inside the purification tank 20, the main flow pipe 34 is disposed at the top of the support 31, one end of the water outlet pipe 33 is communicated with the main flow pipe 34, and one end of the water outlet pipe 33, which is far away from the main flow pipe 34, is communicated with the housing 132.
In this embodiment, the sewage in the purification tank 20 enters the main flow pipe 34 through several sets of the branch flow assemblies 32, and then flows out of the main flow pipe 34 through the outlet pipe 33 to enter the housing 132 of the flow monitor 13, one end of the housing 132 away from the outlet pipe 33 is externally connected with a water pump, and the main flow pipe 34 is fixedly connected to the inner side of the purification tank 20 through the bracket 31.
Further, the branch assembly 32 includes a branch pipe 322 and a plurality of flexible pipes 321 having filtering holes 3211, top ends of the plurality of flexible pipes 321 are all communicated with the branch pipe 322, and the filtering holes 3211 are evenly distributed on an outer circumferential side of the flexible pipes 321 and penetrate through the flexible pipes 321.
In this embodiment, the sewage in the purification tank 20 enters the interior of the plurality of flexible pipes 321 through the filtering holes 3211, and then enters the branch pipes 322, and the sewage flows into the main pipe 34 after being merged in the branch pipes 322.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. An automatic control device of MBR integrated sewage treatment equipment is characterized by comprising a purification tank, a control component and a filter membrane component, wherein the control component is arranged on the outer side of the purification tank and fixedly connected with the purification tank, the filter membrane component is arranged on the inner side of the purification tank, the control component comprises an alarm, a signal lamp, an operation table and a flow monitor, the operation table is arranged on the outer side of the purification tank, the flow detector is arranged on the top of the filter membrane component and communicated with the filter membrane component, the flow detector, the signal lamp and the alarm are electrically connected with the operation table, the signal lamp is arranged on the side face of the operation table, the alarm is arranged on the top of the operation table, the signal lamp comprises a light-emitting plate and a lampshade with a plurality of annular grooves, and the light-emitting plate is arranged on the side face of the operation table, and with operation panel electric connection, the lamp shade set up in keeping away from of luminescent plate operation panel one side, and with luminescent plate fixed connection, a plurality of the annular groove all set up with one heart in keeping away from of lamp shade one side of luminescent plate.
2. The automatic control device of claim 1, wherein the flow monitor comprises an impeller, a rotating shaft, a housing and a rotation speed sensor, the housing is disposed on the top of the filter membrane assembly and is in communication with the filter membrane assembly, the rotation speed sensor is electrically connected to the operating platform, the rotating shaft penetrates through the housing, the impeller is disposed inside the housing and is rotatably connected to the housing through the rotating shaft, and the rotation speed sensor is disposed at one end of the rotating shaft.
3. The automatic control device of the MBR-integrated sewage treatment equipment as claimed in claim 1, wherein the alarm comprises a speaker, a protective shell and a base, the speaker is arranged inside the protective shell and fixedly connected with the protective shell, the protective shell is arranged on the top of the base and fixedly connected with the base, the base is arranged on the top of the operation table and fixedly connected with the operation table, the protective shell is provided with a resonance cavity and a bell mouth, the resonance cavity is arranged inside the protective shell, and the bell mouth is arranged on one side of the protective shell away from the resonance cavity.
4. The automatic control device of the MBR-integrated sewage treatment equipment as claimed in claim 1, wherein the purification tank comprises an air pump and an air duct having a plurality of air holes, the air pump is disposed at the outer side of the purification tank, the air duct is disposed at the bottom of the purification tank, the air duct penetrates through the side wall of the purification tank and is communicated with the air pump, and the plurality of air holes are disposed at the inner side of the air duct.
5. The automatic control device of MBR-integrated sewage treatment equipment as claimed in claim 2, wherein the membrane filtering assembly comprises a water outlet pipe, a main flow pipe, a bracket and a plurality of sets of branch flow assemblies, wherein the top of each branch flow assembly is communicated with the main flow pipe, the bracket is arranged at the inner side of the purification tank, the main flow pipe is arranged at the top of the bracket, one end of the water outlet pipe is communicated with the main flow pipe, and the end of the water outlet pipe, which is far away from the main flow pipe, is communicated with the housing.
6. The automatic control device of MBR-integrated sewage treatment equipment as claimed in claim 5, wherein the branch flow module comprises a branch flow pipe and a plurality of flexible pipes with filtering holes, the top ends of the plurality of flexible pipes are all communicated with the branch flow pipe, and the filtering holes are uniformly distributed on the outer circumferential side of the flexible pipes and penetrate through the flexible pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211895.3A CN112851042A (en) | 2021-02-25 | 2021-02-25 | Automatic control device of MBR integrated sewage treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211895.3A CN112851042A (en) | 2021-02-25 | 2021-02-25 | Automatic control device of MBR integrated sewage treatment equipment |
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| Publication Number | Publication Date |
|---|---|
| CN112851042A true CN112851042A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110211895.3A Pending CN112851042A (en) | 2021-02-25 | 2021-02-25 | Automatic control device of MBR integrated sewage treatment equipment |
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| CN (1) | CN112851042A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117486425A (en) * | 2023-12-14 | 2024-02-02 | 深圳地球村环保产业有限公司 | Industrial wastewater treatment and recycling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117486425A (en) * | 2023-12-14 | 2024-02-02 | 深圳地球村环保产业有限公司 | Industrial wastewater treatment and recycling device |
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Application publication date: 20210528 |
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