CN113356321A - Method for controlling overflow pollution of urban rainwater system of high-density built-up area - Google Patents
Method for controlling overflow pollution of urban rainwater system of high-density built-up area Download PDFInfo
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- CN113356321A CN113356321A CN202110509986.5A CN202110509986A CN113356321A CN 113356321 A CN113356321 A CN 113356321A CN 202110509986 A CN202110509986 A CN 202110509986A CN 113356321 A CN113356321 A CN 113356321A
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- 239000010865 sewage Substances 0.000 claims abstract description 49
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/102—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins using already existing parts of the sewer system for runoff-regulation
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/105—Accessories, e.g. flow regulators or cleaning devices
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/10—Wheeled apparatus for emptying sewers or cesspools
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/10—Wheeled apparatus for emptying sewers or cesspools
- E03F7/106—Accessories, e.g. hose support
Abstract
The invention discloses a method for controlling overflow pollution of a rainwater system in a high-density built-up region city, which follows the overall thought of 'source sewage interception, non-point source control, dredging and end irrigation prevention', and comprises four steps of source sewage interception, non-point source control, dredging and end irrigation prevention; the source tracing and rectifying of the sewage pipe which is misconnected and mixed into the urban rainwater system are carried out, so that the sewage is prevented from entering the rainwater system from the source; sponge LID facilities are arranged in urban blocks, and drainage wells and storage tanks are arranged in serious areas of surface source pollution, so that surface source control pollution is avoided by cutting in the middle of a surface runoff and rainwater inflow system; the source control and pollution interception of the urban rainwater system are realized, and the invasion of pollutants is greatly reduced.
Description
Technical Field
The invention relates to the technical field of water environment improvement, in particular to a method for controlling overflow pollution of a urban rainwater system in a high-density built-up area.
Background
At present, aiming at the problem of overflow pollution of an urban rainwater system, the most commonly adopted method is to arrange an artificial wetland, an ecological buffer zone, a flow abandoning well, a regulation and storage tank, a cyclone separation device and the like at the tail end of the urban rainwater system. Due to the characteristics of the rainwater system and the large construction scale of the city, the scales of the required artificial wetland and the regulation and storage tank are extremely large. Although the scale of the regulating and storing pool is over tens of thousands of squares and tens of thousands of squares, the terminal regulating and storing pool can not well control the initial runoff pollution due to the large scale of the catchment area and the long confluence path. In the case of cities with high-density built-up areas, the land is difficult, and the reduction and control of overflow pollution cannot be achieved through the measures. The cleaning and separating effect and the operation and maintenance of new devices such as cyclone separation equipment are questionable, the application is very few, and the reduction and the control of overflow pollution in cities of high-density built-up areas are still not sufficient.
Based on the situation, the invention provides a control method for overflow pollution of a urban rainwater system of a high-density built-up area, which can effectively solve the problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to greatly reduce the invasion and accumulation of pollution in rainwater systems in cities in a high-density built-up area so as to control the overflow pollution of the rainwater systems, and through the thinking of the system, targeted measures and methods are taken to solve the background problem.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a method for controlling overflow pollution of a rainwater system in a city of a high-density built-up area comprises the following steps:
s1, intercepting sewage at a source, tracing the source of a sewage pipe which is misconnected and mixed-connected into the urban rainwater system, plugging and rectifying the sewage pipe misconnected and mixed-connected from the source cell, and avoiding the rainwater system from storing sewage;
s2, controlling the surface source, wherein the surface source reduction is divided into two aspects: on one hand, the method can be realized through sponge modification engineering in urban blocks, and the initial rainwater runoff pollution can be reduced to a certain extent after the initial purification of the sponge LID facility; on the other hand, a flow abandoning well and a regulation and storage pool are arranged at a main rainwater outlet of a region with serious non-point source pollution, so that initial rainwater runoff pollution is intercepted, and runoff pollution in a rainwater system is reduced to a certain extent;
s3, dredging, namely dredging a rainwater system, removing sludge in a pipe culvert, detecting the rainwater system, and repairing a structural defect point position through analysis of a detection evaluation report to prevent low-pollution external water from invading from a serious pipeline defect position;
and S4, preventing irrigation at the tail end, plugging and modifying a catch basin at the tail end of the rainwater system after the implementation of the steps S1, S2 and S3, cutting off the communication between the rainwater system and the sewage system, and preventing outside water from flowing back into the rainwater system through the river-following sewage interception system.
As a preferred technical solution of the present invention, the sewage pipeline misconnection mixed-connection occurrence position in step S1 may be inside an inspection well or a rainwater pipe culvert, and the occurrence position is plugged after the inspection well can perform source tracing and inspection by connecting a branch pipe with water flow to the rainwater system inspection well during drought, and then is connected to a sewage system; the rainwater system can be desilted and detected by the occurrence position in the rainwater pipe culvert through the passing, the misconnection mixed connection position is determined according to the subsequent evaluation report, and the sewage system is connected after plugging after tracing.
As a preferred technical solution of the present invention, the area with serious non-point source pollution in step S2 includes old urban houses, farmer' S market, car wash for repair, dining street and garbage transfer station.
As a preferred technical solution of the present invention, the arrangement of the sponge LID facility in step S2 is determined according to the total annual runoff quantity control rate of the area, the type, the topography and the greening rate of the implemented urban area, and the reduction rate of initial rainwater runoff pollution is generally 40-50%.
As a preferred technical solution of the present invention, in the step S2, the sponge engineering project is divided into land parcel type, road type and park green land type; the sponge transformation of the plot and the residential area mainly transforms a hardened roof into a green roof, a green belt tree pool in the residential area sinks to transform the hardened roof into a biological retention pool or a concave greenbelt, a rainwater tank is additionally arranged at the tail end of a rainwater vertical pipe or is disconnected, rainwater falls into the concave greenbelt or a high-level flower bed after the disconnection, and a road pavement in the residential area is transformed into a permeable pavement; the sponge transformation of the road mainly comprises the sinking of a road green belt and the transformation of line-withdrawing area greening into a biological detention pool; the park green land sponge modification mainly comprises the combined use of biological retention ponds, permeable pavement and sunk green land sponge LID facilities, and a front pond is additionally arranged on a water system lake in the park, and water level regulation measures are added to realize the regulation and storage functions of the lake.
As a preferable technical scheme of the invention, the flow abandoning well in the step S2 is only connected with the rainwater system and the regulating and storing tank, the volume of the regulating and storing tank can be determined according to the runoff pollution regulating and storing depth of the area with serious non-point source pollution, the value is generally 4-8 mm, and initial rainwater in the regulating and storing tank is lifted by the sewage pump and discharged into the sewage system.
As a preferred technical solution of the present invention, in the step S3, the rainwater system is desilted by cooperating manual desilting and mechanical desilting to remove the debris in the pipe culvert and the inspection shaft.
As a preferred technical scheme of the present invention, in the step S3, excavation repair and non-excavation repair are adopted for repairing the structural defect, where the excavation repair is to rebuild the defective pipe section, and a new pipeline and a connector are used to replace the defective pipe section, and the non-excavation repair is to repair the defective pipe section locally or integrally by using a lining pipe and spraying a repair material.
As a preferable technical solution of the present invention, in the step S4, the intercepting pipe in the intercepting well is connected to the sewage intercepting pipe along the river, the overflow pipe is connected to the river, and the outlet of the overflow pipe is provided with a flap valve.
As a preferred technical solution of the present invention, the detection of the rainwater system in steps S1 and S3 adopts a CCTV detection method, that is, a method for detecting a pipeline by using a closed-circuit television system.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention follows the whole thinking of 'source sewage interception, non-point source control, dredging and end irrigation prevention', and avoids sewage from entering a rainwater system from the source by tracing and modifying the sewage pipe which is misconnected and mixed into the urban rainwater system; sponge LID facilities are arranged in urban blocks, and drainage wells and storage tanks are arranged in serious areas of surface source pollution, so that surface source control pollution is cut at the middle ring sections of ground runoff and rainwater inflow systems. In the invention, the storage regulation pool is arranged at the main outlet of the rainwater system in the area with serious non-point source pollution, the scale of the required storage regulation pool is far smaller than that of the storage regulation pool in the background technology, and the high-density built-up area has full feasibility of implementation; dredging a rainwater system, removing accumulated mud in a pipe culvert, reducing the pollutant load of water systems such as rivers and lakes in a rainfall period, then carrying out CCTV (closed-circuit television) detection on the water systems, repairing structural defect points such as leakage and the like, and preventing low-pollution external water from invading; plugging and reforming the intercepting well at the tail end of the rainwater system, cutting off the communication of the rainwater and sewage system, and preventing sewage diluted by water bodies such as rivers and lakes from being poured into the rainwater system and the like. By adopting the measures, the invasion and accumulation of urban rainwater system pollution can be greatly reduced, so that the overflow pollution at the tail end of the rainwater system is reduced and controlled.
Drawings
Fig. 1 is a schematic view of a method for controlling overflow pollution of a rainwater system in a high-density built-up city according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The invention will be further described with reference to the accompanying fig. 1 and examples, but is not to be construed as being limited thereto.
As shown in fig. 1, the embodiment provides a method for controlling overflow pollution of a rainwater system in a high-density built-up region city, which follows the overall concept of "source interception, non-point source control, dredging, and end irrigation prevention", and specifically includes the following steps:
s1, intercepting sewage at the source, tracing the source of the sewage pipe 1 which is misconnected and mixed-accessed into the urban rainwater system, plugging and reforming the sewage pipe which is misconnected and mixed-accessed at the source from the source cell 2, and avoiding the sewage from being stored in the rainwater system 3;
s2, controlling the surface source, wherein the surface source reduction is divided into two aspects: on one hand, the method can be realized through sponge engineering of an urban block 8, and the initial rainwater runoff pollution can be reduced to a certain extent after the initial purification of the sponge LID facility 7 (the specific structure of the sponge LID facility adopts conventional selection in the field, and the invention is not further described); on the other hand, a flow abandoning well 10 and a regulating and storing pool 11 are arranged at the general outlet of the rainwater system 3 in the area source serious pollution areas 9 such as the old urban area, the farmer market, the automobile repair and washing shop, the one-street restaurant, the garbage transfer station and the like, so that the initial rainwater runoff pollution is intercepted, and the runoff pollution in the rainwater system 3 is reduced to a certain extent;
s3, dredging, namely dredging the rainwater system 3, removing sludge in the pipe culvert, and reducing the pollutant load of water systems such as rivers and lakes in the rainfall period; then, the rainwater system 3 is detected, structural defects 12 such as leakage and the like are repaired through analysis of subsequent detection evaluation reports, and low-pollution external water is prevented from invading from the position with serious defects of the rainwater pipe culvert;
and S4, performing terminal irrigation prevention, modifying the intercepting well 14 at the terminal of the rainwater system 3 after the implementation of the S1, the S2 and the S3, plugging 6 (sealing the pipe orifice by adopting a method of building concrete bricks or pouring reinforced concrete blocks so as to prevent the pipelines from being communicated) the intercepting pipe in the intercepting well 14, cutting off the communication between the rainwater system 3 and the river-edge sewage intercepting pipe 13, and preventing water bodies such as rivers and lakes and the like from being poured into the rainwater system 3 through the river-edge sewage intercepting pipe 13.
Further: source district 2 misconnection sewage pipe 1 is septic tank 4 and 5 misconnection district rainwater system 3 of building sewage riser, sewage pipe 1 misconnection emergence position can be inside inspection shaft or rainwater pipe culvert, the emergence position is at the inspection shaft, and the accessible is to 3 inspection shaft access branch pipes that have rivers when drought back of tracing to the source investigation of rainwater system, shutoff 6, change into sewage pipe 1, the accessible of emergence position in rainwater pipe culvert inside carries out desilting and detection to rainwater system 3, confirms the position of misconnection according to follow-up aassessment report, and after tracing to the source investigation, shutoff 6 changes into sewage pipe 1.
Further: the arrangement of the sponge LID facility 7 is determined according to the requirements of the annual runoff total control rate of the region, the type, the landform, the greening rate and the like of the implemented urban block 8, and the reduction rate of initial rainwater runoff pollution by the sponge LID facility 7 is generally 40-50%.
Further: the sponge transformation project of the urban block 8 is divided into a plot district, a road and a park greenbelt type, the plot district sponge transformation mainly transforms a hardened roof into a green roof (namely a planting roof), a greenbelt tree pool in the district sinks to be transformed into a biological retention pool or a concave greenbelt, a rainwater tank is additionally arranged at the tail end of a rainwater vertical pipe or is disconnected, rainwater falls into a concave greenbelt or a high-level flower bed after the disconnection, and the road pavement in the district is transformed into permeable pavement; the sponge reconstruction of the road is mainly realized by measures such as the sinking of a road green belt and the reconstruction of greening of a line-withdrawing area into a biological detention pond; the park green land sponge transformation mainly comprises the combined use of sponge LID facilities 7 in the forms of a biological retention pond, a permeable pavement, a sunken green land and the like, and a front pond, water level regulation measures and the like are additionally arranged on a water system lake pond in the park to realize the regulation and storage functions of the lake pond.
The abandoning well 10 is only connected with a rainwater system 3 and a regulating and storing tank 11, the regulating and storing tank 11 is used for collecting initial rainwater of an area 9 with serious non-point source pollution, the volume of the regulating and storing tank 11 can be determined according to the runoff pollution regulating and storing depth of the area 9 with serious non-point source pollution, the value is generally 4-8 mm, and the initial rainwater in the regulating and storing tank 11 is lifted by a sewage pump and discharged into a sewage pipe 1.
Further: the pipe culvert dredging adopts the matching operation of manual dredging and mechanical dredging to carry out dredging on sundries such as sewage, silt, sand and the like in the pipe culvert and the inspection well. Aiming at a rainwater pipeline with DN being less than or equal to 900mm and a rainwater box culvert with H being less than or equal to 900mm, the sludge is cleaned mainly by machinery, a sewage suction truck is adopted to suck the sludge after the sludge accumulated in the pipeline is washed by a high-pressure water gun, and meanwhile, impurities such as sand stones and the like in the pipeline are cleaned; aiming at rainwater pipelines with DN being more than 900mm and rainwater box culverts with H being more than 900mm, the method mainly adopts manual cleaning of sludge, sand stone and the like in the pipelines, and adopts a closed transport vehicle to transport away after filling into bags.
Further: the external water is low-pollution underground water, invades into the rainwater system 3 from the positions where structural defects 12 exist, such as damaged positions of the pipe culvert or joints, and can be used for positioning external water invasion points according to evaluation reports after dredging and detection are carried out on the rainwater pipe culvert.
Further: the repair of the structural defect 12 at the external water intrusion position can adopt excavation repair and non-excavation repair, wherein the excavation repair is to rebuild the defective pipe section and replace the defective pipe section with a new pipeline and a connector, and the non-excavation repair is to repair the defective pipe section locally or integrally by adopting lining pipes, spraying repair materials and other modes.
Further: the reverse flow is that river and lake water permeates into the river-following sewage intercepting pipe 13 to cause the water level to rise, and flows into the rainwater system 3 through the intercepting well 14 at the tail end of the rainwater system 3, the intercepting pipe in the intercepting well 14 is connected with the river-following sewage intercepting pipe 13, the overflow pipe is connected with water bodies such as a river channel, and the outlet of the overflow pipe is provided with a flap valve 15.
Further: and in the steps S1 and S4, the pipe orifice is sealed by adopting a method of building concrete bricks or pouring reinforced concrete blocks, so that the pipelines are not communicated.
Further: the detection of the rainwater system in the steps S1 and S3 adopts a CCTV detection method, that is, a method of detecting a pipeline by using a closed-circuit television system.
Finally, it should be noted that: it should be understood that the above description is only a preferred embodiment of the present invention, and those skilled in the art can still make modifications to the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A control method for overflow pollution of a urban rainwater system in a high-density built-up area is characterized by comprising the following steps: the method comprises the following steps:
s1, intercepting sewage at a source, tracing the source of a sewage pipe which is misconnected and mixed-connected into the urban rainwater system, plugging and rectifying the sewage pipe misconnected and mixed-connected from the source cell, and avoiding the rainwater system from storing sewage;
s2, controlling the surface source, wherein the surface source reduction is divided into two aspects: on one hand, the method can be realized through sponge modification engineering in urban blocks, and the initial rainwater runoff pollution can be reduced to a certain extent after the initial purification of the sponge LID facility; on the other hand, a flow abandoning well and a regulation and storage pool are arranged at a main rainwater outlet of a region with serious non-point source pollution, so that initial rainwater runoff pollution is intercepted, and runoff pollution in a rainwater system is reduced to a certain extent;
s3, dredging, namely dredging a rainwater system, removing sludge in a pipe culvert, detecting the rainwater system, and repairing a structural defect point position through analysis of a detection evaluation report to prevent low-pollution external water from invading from a serious pipeline defect position;
and S4, preventing irrigation at the tail end, plugging and modifying a catch basin at the tail end of the rainwater system after the implementation of the steps S1, S2 and S3, cutting off the communication between the rainwater system and the sewage system, and preventing outside water from flowing back into the rainwater system through the river-following sewage interception system.
2. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: in the step S1, the misconnection and mixed connection position of the sewage pipeline can be the inside of an inspection well or a rainwater pipe culvert, and the occurrence position is plugged after the inspection well can be subjected to source tracing and inspection by connecting branch pipes with water flow into the inspection well of the rainwater system in a drought state, and then is connected into the sewage system; the rainwater system can be desilted and detected by the occurrence position in the rainwater pipe culvert through the passing, the misconnection mixed connection position is determined according to the subsequent evaluation report, and the sewage system is connected after plugging after tracing.
3. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: the area with serious non-point source pollution in the step S2 comprises old urban houses, farmer markets, automobile repair and vehicle washing shops, a restaurant street and a garbage transfer station.
4. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: the arrangement of the sponge LID facilities in the step S2 is determined according to the annual runoff total quantity control rate of the area, the type of the implemented urban area, the topography and the greening rate, and the reduction rate of initial rainwater runoff pollution is generally 40-50%.
5. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: the sponge reconstruction project in the step S2 is divided into land parcel, road and park green land types; the sponge transformation of the plot and the residential area mainly transforms a hardened roof into a green roof, a green belt tree pool in the residential area sinks to transform the hardened roof into a biological retention pool or a concave greenbelt, a rainwater tank is additionally arranged at the tail end of a rainwater vertical pipe or is disconnected, rainwater falls into the concave greenbelt or a high-level flower bed after the disconnection, and a road pavement in the residential area is transformed into a permeable pavement; the sponge transformation of the road mainly comprises the sinking of a road green belt and the transformation of line-withdrawing area greening into a biological detention pool; the park green land sponge modification mainly comprises the combined use of biological retention ponds, permeable pavement and sunk green land sponge LID facilities, and a front pond is additionally arranged on a water system lake in the park, and water level regulation measures are added to realize the regulation and storage functions of the lake.
6. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: and in the step S2, the flow abandoning well is only connected with the rainwater system and the regulation and storage tank, the volume of the regulation and storage tank can be determined according to the regulation and storage depth of runoff pollution in the area with serious non-point source pollution, the value is generally 4-8 mm, and initial rainwater in the regulation and storage tank is lifted by a sewage pump and discharged into a sewage system.
7. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: and in the step S3, dredging the rainwater system by adopting the matching operation of manual dredging and mechanical dredging to carry out dredging on sundries in the pipe culvert and the inspection well.
8. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: in the step S3, the structural defect is repaired by excavation repair, i.e., rebuilding the defective pipe section, replacing the defective pipe section with a new pipeline and a new connector, and performing local or overall repair on the defective pipe section by lining the pipe and spraying a repair material.
9. The method for controlling overflow pollution of a rainwater system in a high-density built-up district city according to claim 1, wherein: and in the step S4, the intercepting pipe in the intercepting well is connected with the river-following intercepting pipe, the overflow pipe is connected with the river channel, and the outlet of the overflow pipe is provided with a flap valve.
10. The method for controlling overflow contamination of a rainwater system in a high-density built-up area city according to claim 1 or 2, wherein: the detection of the rainwater system adopts a CCTV detection method, namely a method for detecting a pipeline by using a closed-circuit television system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116495946A (en) * | 2023-06-27 | 2023-07-28 | 珠江水利委员会珠江水利科学研究院 | Comprehensive treatment method and system for urban rainwater sewage interception, regulation and dredging |
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|---|---|---|---|---|
| CN109763453A (en) * | 2019-01-29 | 2019-05-17 | 武汉市规划设计有限公司 | Method for urban inner rivers and canals Comprehensive Treatment of Pollution |
| CN111932403A (en) * | 2020-08-18 | 2020-11-13 | 中建水务环保有限公司 | Urban sewage pipe network and water environment quality-improving and efficiency-increasing technology integration method |
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2021
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763453A (en) * | 2019-01-29 | 2019-05-17 | 武汉市规划设计有限公司 | Method for urban inner rivers and canals Comprehensive Treatment of Pollution |
| CN111932403A (en) * | 2020-08-18 | 2020-11-13 | 中建水务环保有限公司 | Urban sewage pipe network and water environment quality-improving and efficiency-increasing technology integration method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116495946A (en) * | 2023-06-27 | 2023-07-28 | 珠江水利委员会珠江水利科学研究院 | Comprehensive treatment method and system for urban rainwater sewage interception, regulation and dredging |
| CN116495946B (en) * | 2023-06-27 | 2023-10-13 | 珠江水利委员会珠江水利科学研究院 | Comprehensive treatment method and system for urban rainwater sewage interception, regulation and dredging |
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Application publication date: 20210907 |