CN112979005A - Multistage gravity type organic sewage treatment device - Google Patents
Multistage gravity type organic sewage treatment device Download PDFInfo
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- CN112979005A CN112979005A CN202110310391.7A CN202110310391A CN112979005A CN 112979005 A CN112979005 A CN 112979005A CN 202110310391 A CN202110310391 A CN 202110310391A CN 112979005 A CN112979005 A CN 112979005A
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- weir
- cleaning
- flow blocking
- slope
- cleaning head
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- 239000010865 sewage Substances 0.000 title claims abstract description 53
- 230000005484 gravity Effects 0.000 title claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 127
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 65
- 230000000903 blocking effect Effects 0.000 claims description 60
- 238000001914 filtration Methods 0.000 claims description 23
- 239000010813 municipal solid waste Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
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- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The utility model provides an organic sewage treatment plant of multistage gravity type, includes the sedimentation tank, sedimentation tank one side is provided with the overflow weir, and the opposite side that overflow weir and sedimentation tank are relative is provided with the decurrent slope of crossing of slope, cross on the slope with overflow weir parallel arrangement have suspended solid intercepting device, suspended solid intercepting device is including keeping off flowing weir and keeping off flowing weir cleaning device, be provided with a plurality of mouths of straining on the fender flowing weir, be provided with the cavity in the fender flowing weir, be provided with the axle of decontaminating in the cavity of fender flowing weir, the axle of decontaminating rotates the setting. The invention provides a multistage gravity type organic sewage treatment device, which can treat suspended matters in sewage by a multistage interception device by using the self weight of the sewage, can continuously work, and has low energy consumption and excellent treatment effect.
Description
Technical Field
The invention relates to an organic sewage treatment device, in particular to a multi-stage gravity type organic sewage treatment device, and belongs to the technical field of sewage treatment.
Background
In urban sewage treatment, sewage containing a large amount of suspended matter impurities can be used for a subsequent treatment process only by pretreatment, and the currently adopted process is that a coagulant, a flocculant and a coagulant aid are added into a flocculation tank to perform a biological reaction with the impurities in the sewage to generate flocculate, and then the flocculate is precipitated in a sedimentation tank to remove suspended matters with large specific gravity. The flocculation reaction process is influenced by the environmental temperature, the pH value of the water body, the reaction time and the water body environment, a large amount of fine flocculates cannot be precipitated, and the urban sewage is characterized by containing more organic fibers, low density and poor precipitation effect, so that the impurities need to be removed in the subsequent process. At present, the waste water after precipitation is subjected to slag removal treatment by using a grating, a filter screen or a filter press as subsequent dewatering equipment, the devices are easy to block in use, and the devices are manually cleaned in the working process and cannot continuously work. And the equipment investment such as the filter press is large, the energy consumption is high and the treatment capacity is small, so the existing wastewater treatment device has poor treatment capacity on the flocculated suspended matters and has low operation cost and operation efficiency, and because the treatment capacity is insufficient, the direct discharge of sewage is often caused, so the water ecosystem is damaged, and the water environment quality is deteriorated.
Disclosure of Invention
The invention aims to: the multistage gravity type organic sewage treatment device can treat suspended matters in sewage by using the self weight of the sewage through the multistage interception device, can continuously work, and has low energy consumption and excellent treatment effect.
In order to realize the purpose, the invention adopts the technical scheme that: a multi-stage gravity type organic sewage treatment device comprises a sedimentation tank, wherein one side of the sedimentation tank is provided with an overflow weir, the other side of the overflow weir is provided with a water passing slope which inclines downwards, a suspended matter interception device is arranged on the water passing slope and comprises a flow blocking weir and a flow blocking weir cleaning device, the flow blocking weir is arranged on the water passing slope and is parallel to the overflow weir, a plurality of water filtering openings are formed in the flow blocking weir, a sewage cleaning shaft is arranged above the flow blocking weir, the sewage cleaning shaft is rotatably arranged, a plurality of rotating support rods are arranged on the sewage cleaning shaft, and the plurality of rotating support rods are respectively arranged in one-to-one correspondence with the plurality of water filtering openings; the flow blocking weir cleaning device comprises a cleaning head and a cleaning head driving device, the cleaning head is arranged on the side surface of the flow blocking weir, and the cleaning head driving device drives the cleaning head to reciprocate along the flow blocking weir; furthermore, a plurality of flow blocking weirs are arranged on the water passing slope from top to bottom, wherein the caliber of a water filtering opening of the flow blocking weir positioned above the water passing slope in two adjacent flow blocking weirs up and down is larger than the caliber of a water filtering opening of the flow blocking positioned below the water passing slope, and a flow blocking weir cleaning device is respectively arranged on each flow blocking weir; furthermore, a cleaning slope is arranged on one side of the water passing slope, the cleaning slope is a slope which rises upwards along the flow blocking weir towards the outer side of the water passing slope, and a cleaning platform is arranged at the top of the cleaning slope; the cleaning device for the flow blocking weir comprises a cleaning guide rail and a cleaning head driving motor which are arranged above the flow blocking weir, a sliding block is arranged on the cleaning guide rail in a sliding mode, the cleaning head driving motor drives the sliding block to reciprocate along the cleaning guide rail, a cleaning rod is arranged on the sliding block downwards and comprises an upper cleaning rod and a lower cleaning rod, the lower cleaning rod is sleeved on the upper cleaning rod in a sliding mode, the cleaning head is arranged at the top end of the cleaning rod, and the cleaning head is arranged on the side face of the flow blocking weir; furthermore, the longitudinal section of the flow blocking weir is an arc-shaped longitudinal section, the dirt removing shaft and the flow blocking weir are arranged in parallel, the positions, corresponding to the water filtering ports in the flow blocking weir, on the dirt removing shaft are respectively provided with a rotating support rod, and the rotating support rods on the same dirt removing shaft are connected through a reinforcing connecting rod; further, the dirt removing shaft is arranged on the power output end of the dirt removing motor, and the dirt removing motor drives the dirt removing shaft to rotate in a reciprocating mode; furthermore, a water passing through hole is formed in a horizontal plane of the cleaning head, which is consistent with the water flow direction, and the cleaning head driving motor drives the sliding block to reciprocate on the cleaning guide rail through a pull rod or a chain.
The invention has the positive and beneficial technical effects that: the invention sets up the water-passing slope with weir of baffling at the downstream of the sedimentation tank, the upper sewage with suspended matter after depositing through the sedimentation tank flows to the collecting basin along the water-passing slope after overflowing from the weir, during the sewage flows downward, the sewage containing suspended matter is intercepted by the weir of baffling, make sewage flow downstream from a plurality of drainage openings set up on the weir of baffling, the suspended matter greater than the drainage opening is stopped at the upstream of weir of baffling among them, because there are a plurality of weir of baffling on the water-passing slope, and the drainage opening on the weir of baffling reduces from top to bottom sequentially, make the suspended matter in the sewage intercepted step by step according to the particle size, can increase the cleaning effect effectively; when suspended matters intercepted by the water filtering opening are excessive, the sewage cleaning shaft rotates by 90 degrees, the rotating support rods arranged on the sewage cleaning shaft move from a horizontal state to a vertical state, the suspended matters intercepted in the water filtering opening are intercepted by the rotating support rods and conveyed to one side of the upstream of the rotating support rods, then the cleaning head is driven by the cleaning head driving motor to move along the side surfaces of the rotating support rods so as to push the intercepted solid sewage to one side of a water passing slope, and when the cleaning head moves to a sewage cleaning slope, the lower section cleaning rod sleeved on the upper section cleaning rod gradually retracts upwards to adapt to the gradient change of the sewage cleaning slope until the solid sewage is pushed to the cleaning platform; the water passing through hole arranged on the horizontal plane with the cleaning head consistent with the water flow direction can reduce the impact force of the cleaning head in water and prevent the cleaning rod from deforming; each rotation branch can increase the structural strength who rotates branch through consolidating the connecting rod connection, prevents that rivers from assaulting the deformation. The invention utilizes the gravity of the sewage to filter solid suspended matters, is beneficial to reducing energy consumption, can effectively remove various suspended matters in the sewage by adopting a multi-stage filtering mode, and can timely remove the solid dirt by adopting the rotating support rod for removing the dirt and matching with the flow blocking weir cleaning device, so that the whole sewage treatment device can continuously operate, and the production efficiency is improved; the flow blocking weir adopts the arc-shaped cross section, so that the scouring damage of sewage to the flow blocking weir can be reduced, the generation of turbulence can be effectively prevented, the dissolved oxygen amount can be controlled, and the subsequent denitrification process production is facilitated.
Drawings
FIG. 1 is a schematic view showing the operation of the sewage treatment apparatus according to one embodiment of the present invention in a normal state.
FIG. 2 is a schematic view of the rotating rod after rotating to clean the dirt according to one embodiment of the present invention.
FIG. 3 is a schematic view of the combination of the trash removal shaft, the rotational support rod and the flow blocking weir according to an embodiment of the present invention.
FIG. 4 is a schematic view of the operation of a weir cleaning device according to one embodiment of the present invention.
FIG. 5 is a schematic view of the combination of a rotating strut and a weir according to one embodiment of the present invention.
FIG. 6 is a schematic view of the rotational support bar of one embodiment of the present invention engaged with a weir after rising for cleaning.
Fig. 7 is a schematic structural view of a flow weir according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of the trash removal shaft and the rotating rod according to an embodiment of the present invention.
FIG. 9 is a schematic view of the engagement of a cleaning rod with a cleaning head according to one embodiment of the present invention.
Detailed Description
In order to more fully explain the implementation of the present invention, the implementation examples of the present invention are provided, which are merely illustrative of the present invention and do not limit the scope of the present invention.
The invention is explained in further detail in connection with the drawings, in which: 1. a sedimentation tank; 2. passing through a water slope; 3. a flow blocking weir; 4. cleaning the guide rail; 5. a cleaning rod; 6. cleaning the shaft; 7. rotating the supporting rod; 8. solid dirt; 9. a water filtering port; 10. a sewage disposal motor; 11. cleaning a sewage slope; 12. cleaning the platform; 13. cleaning the guide rail; 14. an upper section cleaning rod; 15. a lower cleaning rod; 16. a slider; 17. a water collecting tank; 18. a cleaning head; 19. reinforcing the connecting rod; 20. a water passing through hole.
As shown in the figure: a multistage gravity type organic sewage treatment device comprises a sedimentation tank 1, wherein an overflow weir is arranged on one side of the sedimentation tank, a water passing slope 2 which inclines downwards is arranged on the other side of the overflow weir, a plurality of flow blocking weirs 3 are arranged on the water passing slope, the flow blocking weirs are arranged in parallel with the overflow weir, the longitudinal section of each flow blocking weir is a circular arc-shaped longitudinal section, a plurality of water filtering ports 9 are arranged on each flow blocking weir, the water filtering ports are uniformly distributed along the axial direction of the flow blocking weir, the size of the water filtering port on the flow blocking weir positioned on the upstream is larger than that of the water filtering port on the flow blocking weir positioned on the downstream, a cleaning shaft 6 is arranged on one side of each flow blocking weir positioned on the upstream, the cleaning shaft is arranged in a rotating manner in the horizontal direction, the cleaning shaft is arranged on an output shaft of a cleaning motor, and the cleaning motor drives the cleaning shaft; a plurality of rotating support rods 7 are arranged on the sewage disposal shaft, and are respectively arranged in one-to-one correspondence with a plurality of water filtering openings on the downstream flow blocking weir; a cleaning guide rail is correspondingly arranged above each flow blocking weir, a cleaning head driving motor is arranged on each cleaning guide rail, the cleaning head driving motor is not shown in the figure, and the cleaning head driving motor drives the sliding block 16 to reciprocate on the cleaning guide rails. Be provided with cleaning rod 5 on the slider downwards, cleaning rod includes upper segment cleaning rod 14 and hypomere cleaning rod 15, and hypomere cleaning rod slip cap establishes on upper segment cleaning rod, and the cleaning rod top is provided with cleaning head 18, and the cleaning head setting is in the upstream position of rotating branch to with the laminating setting of rotating branch. A cleaning slope 11 is arranged on one side of the water passing slope, as shown in fig. 4, the cleaning slope is a slope which is lifted upwards along the flow blocking weir towards the outer side of the water passing slope, a cleaning platform 12 is arranged at the top of the cleaning slope, a left cleaning rod in fig. 4 is in a state of conveying solid dirt 8 to the cleaning platform along the flow blocking weir, a right cleaning rod is in a state of a working cleaning rod, and it can be seen that the lower cleaning rod is gradually deeply sleeved into the outer side of the upper cleaning rod along with the change of the slope; as shown in fig. 8, the rotating support rods on the same trash removal shaft are connected through a reinforcing connecting rod 1 to enhance the strength of the rotating support rods; as shown in fig. 9, the water passing hole 20 is formed on the horizontal plane of the cleaning head in the same direction as the water flow, that is, the direction of the water passing hole is in the same direction as the water flow, so that the impact of the water flow on the cleaning head can be reduced, and the deformation of the cleaning rod can be prevented.
When the invention is operated, the upper layer sewage with suspended matters after being precipitated by the sedimentation tank flows to the water collecting tank along the water passing slope after overflowing from the overflow weir, and during the downward flow of the sewage, the sewage containing the suspended matters is intercepted by the flow blocking weir, so that the sewage flows downstream from a plurality of water filtering openings arranged on the flow blocking weir, and the suspended matters larger than the water filtering openings are intercepted at the upstream of the flow blocking weir, because a plurality of flow blocking weirs are arranged on the water passing slope, and the water filtering openings on the flow blocking weir are sequentially reduced from top to bottom, the suspended matters in the sewage are intercepted step by step according to the particle size, when the solid sewage is intercepted to a certain amount, the rotating support rod moves from horizontal to vertical, the sewage cleaning shaft rotates 90 degrees upwards to collect the solid sewage at the water filtering openings to the upstream position of the rotating support rods, and then the cleaning head is driven by the cleaning head to move along the side surfaces of the rotating support rods to push the, when the cleaning head moves to the cleaning slope, the lower section cleaning rod sleeved on the upper section cleaning rod gradually retracts upwards to adapt to the gradient change of the cleaning slope until solid dirt is pushed to the cleaning platform.
After the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and it is intended that all simple modifications, equivalent changes and modifications made to the above embodiments based on the technical spirit of the present invention shall fall within the technical scope of the present invention, and the present invention shall not be limited to the embodiments illustrated in the description.
Claims (6)
1. The utility model provides an organic sewage treatment plant of multistage gravity type, includes the sedimentation tank, its characterized in that: an overflow weir is arranged on one side of the sedimentation tank, a water passing slope which inclines downwards is arranged on the other side of the overflow weir, a suspended matter intercepting device is arranged on the water passing slope and comprises a flow blocking weir and a flow blocking weir cleaning device, the flow blocking weir is arranged on the water passing slope and is parallel to the overflow weir, a plurality of water filtering ports are arranged on the flow blocking weir, a sewage cleaning shaft is arranged on one side of the flow blocking weir, the sewage cleaning shaft is rotatably arranged, a plurality of rotating support rods are arranged on the sewage cleaning shaft, and the plurality of rotating support rods are respectively arranged in one-to-one correspondence with the plurality of water filtering ports; the flow blocking weir cleaning device comprises a cleaning head and a cleaning head driving device, wherein the cleaning head is arranged on the side surface of the flow blocking weir, and the cleaning head driving device drives the cleaning head to reciprocate along the flow blocking weir.
2. The apparatus of claim 1, wherein: the water passing slope is provided with a plurality of flow blocking weirs from top to bottom, wherein the caliber of a water filtering opening of the flow blocking weir positioned above the water passing slope is larger than the caliber of a water filtering opening of the flow blocking weir positioned below the water passing slope, and each flow blocking weir is provided with a flow blocking weir cleaning device.
3. The apparatus of claim 1, wherein: a cleaning slope is arranged on one side of the water passing slope, the cleaning slope is a slope which is lifted upwards along the flow blocking weir towards the outer side of the water passing slope, and a cleaning platform is arranged at the top of the cleaning slope; keep off and flow weir cleaning device including setting up clean guide rail and the cleaning head driving motor in the weir top of keeping off, the slip is provided with the slider on the clean guide rail, cleaning head driving motor drive slider is provided with clean pole downwards on the slider along clean guide rail reciprocating motion, clean pole includes clean pole of upper segment and the clean pole of hypomere, and the clean pole slip cap of hypomere is established on the clean pole of upper segment, and the clean pole top is provided with the cleaning head, the side of weir is flowed in the fender to the cleaning head setting.
4. The apparatus of claim 1, wherein: the longitudinal section of the flow blocking weir is a circular arc-shaped longitudinal section, the dirt removing shaft and the flow blocking weir are arranged in parallel, the positions, corresponding to the water filtering ports in the flow blocking weir, of the dirt removing shaft are respectively provided with a rotating support rod, and the rotating support rods on the same dirt removing shaft are connected through a reinforcing connecting rod.
5. The apparatus of claim 1, wherein: the trash removal shaft is arranged at the power output end of the trash removal motor, and the trash removal motor drives the trash removal shaft to rotate in a reciprocating mode.
6. The apparatus of claim 3, wherein: a water passing through hole is formed in the horizontal plane, in which the direction of the cleaning head is consistent with that of water flow, and the cleaning head driving motor drives the sliding block to reciprocate on the cleaning guide rail through a pull rod or a chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110310391.7A CN112979005A (en) | 2021-03-24 | 2021-03-24 | Multistage gravity type organic sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110310391.7A CN112979005A (en) | 2021-03-24 | 2021-03-24 | Multistage gravity type organic sewage treatment device |
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| Publication Number | Publication Date |
|---|---|
| CN112979005A true CN112979005A (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110310391.7A Pending CN112979005A (en) | 2021-03-24 | 2021-03-24 | Multistage gravity type organic sewage treatment device |
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| Country | Link |
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| CN (1) | CN112979005A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116943312A (en) * | 2023-09-21 | 2023-10-27 | 广东省广业装备科学技术研究院有限公司 | Interception system for sewage treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116943312A (en) * | 2023-09-21 | 2023-10-27 | 广东省广业装备科学技术研究院有限公司 | Interception system for sewage treatment |
| CN116943312B (en) * | 2023-09-21 | 2023-12-15 | 广东省广业装备科学技术研究院有限公司 | Interception system for sewage treatment |
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Application publication date: 20210618 |