CN107265615B - Confluence and mixed flow rain sewage treatment method and system - Google Patents
Confluence and mixed flow rain sewage treatment method and system Download PDFInfo
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- CN107265615B CN107265615B CN201710641980.7A CN201710641980A CN107265615B CN 107265615 B CN107265615 B CN 107265615B CN 201710641980 A CN201710641980 A CN 201710641980A CN 107265615 B CN107265615 B CN 107265615B
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/107—Inorganic materials, e.g. sand, silicates
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
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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
Abstract
The invention discloses a method and a system for treating combined and mixed flow rain sewage. The system comprises: the collecting tank/regulating and storing tank is used for collecting the combined flow/mixed flow rain sewage exceeding the municipal pipe network system; the lifting pump is connected with the water collecting tank/the regulating and storing tank through a pipeline and is used for lifting the excessive rain sewage in the water collecting tank/the regulating and storing tank; the composite reaction tank is used for treating the excessive rain sewage lifted by the lifting pump; and the drain valve is used for discharging the excessive rain sewage treated by the composite reaction tank. The combined and mixed flow rain sewage treatment method and the system can effectively control the combined and mixed flow rain sewage pollution, not only can realize the rapid treatment of the excess rain sewage exceeding the interception capacity of a pipe network (regulation and storage) system, but also can be used as a treatment facility to realize the high-efficiency treatment of the stored rain sewage. Through specific implementation, when the retention time is 4 hours, the removal rates of COD and NH3-N are respectively 80% and 50% or more, and the pollutants of the rainwater and sewage affecting the water quality can be greatly reduced.
Description
Technical Field
The invention belongs to the technical field of pollution prevention and control, and particularly designs a combined and mixed flow rain sewage treatment process and system, which achieve the purpose of reducing the river-entering pollution load of combined and mixed flow drainage areas.
Background
The urban drainage system can be basically divided into a confluence system and a shunt system, rain sewage is basically used for shunt drainage in newly built urban areas in recent years, and the confluence drainage system is still reserved in part of the urban areas for the reasons of history and the like. Meanwhile, due to factors such as poor maintenance and poor management of the pipe network, a part of rainwater pipe networks have a large-range mixed flow phenomenon, so that part of split-flow drainage becomes substantial mixed-flow drainage. The confluence and mixed flow drainage enables a large amount of pipeline sediments to be accumulated in the pipeline in sunny days, and the pipeline sediments are impacted out of the pipeline in rainy days, so that rainwater entering the urban receiving water body becomes substantial rain and sewage mixed flow water which becomes a main external pollution source for reducing the urban water environment quality. After the source analysis of the confluent and mixed flow pollution load in rainy days, the pipeline deposit is found to become the primary pollution source of rain sewage, and then the rain sewage and the rain runoff in sunny days.
Pollution control methods for combined flow and mixed flow rain sewage can be roughly divided into three categories: the source control technology mainly comprises sponge facilities such as grass planting ditches and the like, an environment-friendly rain inlet, regional rain and sewage diversion transformation and the like; the second is a transportation control technology which mainly comprises a pipeline flushing technology, a pipeline intercepting technology and the like; and the third is a terminal control technology which mainly comprises a rainwater storage tank, a rapid treatment technology and the like. The source control technology is not large in transformation space due to factors such as the limitation of space of a regional plot, and particularly for sponge facilities and regional rain and sewage distribution, the current main technology is mostly focused on transportation and tail end control technology.
Therefore, the reasonable development of the combined and mixed flow rain sewage treatment process and system which have the advantages of land occupation saving, low cost, simple operation and high efficiency has important significance.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method and a system for treating the combined and mixed flow rain sewage, which are used for reducing the pollution of the rain sewage to urban receiving water bodies with less land occupation, low cost, simple operation and high efficiency.
In order to achieve the above object, the present invention provides a combined and mixed flow rain sewage treatment system, comprising:
the collecting tank/regulating and storing tank is used for collecting the combined flow/mixed flow rain sewage exceeding the municipal pipe network system;
the lifting pump is connected with the water collecting tank/the regulating and storing tank through a pipeline and is used for lifting the excessive rain sewage in the water collecting tank/the regulating and storing tank;
the composite reaction tank is used for treating the excessive rain sewage lifted by the lifting pump;
and the drain valve is used for discharging the excessive rain sewage treated by the composite reaction tank.
Preferably, the system also comprises the reflux unit, wherein the reflux unit consists of a reflux control valve and a reflux lift pump which are connected in series; wherein, the reflux lift pump is connected with the water outlet of the composite reaction tank, and the output end of the reflux control valve is connected with the inlet of the collecting tank/the storage tank.
Preferably, the composite reaction tank is provided with an ecological floating bed layer and an elastic filler layer which are communicated with each other from top to bottom in sequence; wherein, the combined flow rain sewage inlet of the composite reaction tank is positioned at the lower section of the elastic packing layer; the combined/mixed flow rain sewage outlet of the composite reaction tank is positioned at the upper section of the elastic packing layer or the junction of the ecological floating bed layer and the elastic packing layer.
Preferably, the composite reaction tank is sequentially provided with an ecological floating bed layer, an elastic packing layer and an aeration biological filter layer which are communicated with each other from top to bottom; wherein, the confluence/mixed flow rain sewage inlet of the composite reaction tank is positioned on the aeration biological filter layer; the combined/mixed flow rain sewage outlet of the composite reaction tank is positioned at the upper section of the elastic packing layer or the junction of the ecological floating bed layer and the elastic packing layer.
Preferably, bagged fillers exist in the aeration biological filter layer, the fillers are ceramsite, and the diameter of the ceramsite is 0.001-0.005 m.
Preferably, the elastic filler layer is composed of an elastic filler, an aeration microporous tube and a supporting structure; the diameter of the elastic filler is 0.05-0.20 m; the aeration microporous pipe is connected with an external aeration system, the material of the aeration microporous pipe is a filamentous hose, the size of the hose is 0.0002-0.001 m, and the aperture of the opening is 0.00005-0.0001 m; the elastic filler and the aeration microporous pipe are arranged and connected on the supporting structure.
In order to achieve the purpose, the invention relates to a method for treating combined and mixed flow rain sewage, which comprises the following steps: judging whether the combined flow rain sewage in the current collecting tank/regulating storage tank exceeds a preset threshold value or not; if the temperature exceeds the preset threshold value, the wastewater is discharged after primary treatment through the composite reaction tank; if not, the preset threshold value is discharged after more than two times of treatment through the composite reaction tank.
Preferably, the aeration treatment is also performed simultaneously with the primary treatment.
Preferably, the composite reaction tank is sequentially provided with an ecological floating bed layer, an elastic packing layer and an aeration biological filter layer which are communicated with each other from top to bottom; wherein, the confluence/mixed flow rain sewage inlet of the composite reaction tank is positioned on the aeration biological filter layer; the combined/mixed flow rain sewage outlet of the composite reaction tank is positioned at the upper section of the elastic packing layer or the junction of the ecological floating bed layer and the elastic packing layer.
Preferably, bagged fillers exist in the aerated biological filter layer, the fillers are ceramsite, and the diameter of the ceramsite is 0.001-0.005 m.
Preferably, the elastic filler layer is composed of an elastic filler, an aeration microporous tube and a supporting structure; the diameter of the elastic filler is 0.005-0.020 m; the aeration microporous pipe is connected with an external aeration system, the material of the aeration microporous pipe is a filamentous hose, the size of the hose is 0.0002-0.001 m, and the aperture of the opening is 0.00005-0.0001 m; the elastic filler and the aeration microporous pipe are arranged and connected on the supporting structure.
The combined and mixed flow rain sewage treatment method and the system can effectively control the combined and mixed flow rain sewage pollution, not only can realize the rapid treatment of the excess rain sewage exceeding the interception capacity of a pipe network (regulation and storage) system, but also can be used as a treatment facility to realize the high-efficiency treatment of the stored rain sewage. Through specific implementation, when the retention time is 4 hours, the removal rates of COD and NH3-N are respectively 80% and 50% or more, and the pollutants of the rainwater and sewage affecting the water quality can be greatly reduced.
Drawings
FIG. 1 is a system diagram of an integrated treatment method of combined flow and mixed flow rain sewage.
FIG. 2 is a sectional view of a composite reaction cell.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
The invention relates to a combined flow and mixed flow rain sewage treatment system, which comprises: the collecting tank/regulating and storing tank is used for collecting the combined flow/mixed flow rain sewage exceeding the municipal pipe network system; the lifting pump is connected with the water collecting tank/the regulating and storing tank through a pipeline and is used for lifting the excessive rain sewage in the water collecting tank/the regulating and storing tank; the composite reaction tank is used for treating the excessive rain sewage lifted by the lifting pump; and the drain valve is used for discharging the excessive rain sewage treated by the composite reaction tank.
When the rainfall occurs, the combined flow rain sewage exceeding the municipal pipe network system enters the water collecting tank/the regulating and storing tank, when the water level in the water collecting tank/the regulating and storing tank is too high, the water inlet lifting pump is operated to lift the excessive rain sewage exceeding the water collecting tank/the regulating and storing tank to the composite reaction tank for treatment, and the drainage control valve is opened to quickly discharge the excessive rain sewage after the primary treatment through the composite reaction tank. Preferably, the aeration system is started to carry out effluent rapid treatment on the sewage during or after treatment.
Example 2: in a specific embodiment, as shown in fig. 1, during rainfall, the combined/mixed rain sewage exceeding the municipal pipe network system enters the water collecting tank/storage regulating tank (1), when the water level in the water collecting tank/storage regulating tank (1) is too high, the water inlet lift pump (2) and the water inlet control valve (3) are operated, the excessive rain sewage exceeding the water collecting tank/storage regulating tank (1) is lifted to the composite reaction tank (5) for treatment, and meanwhile, the aeration system (9) is started to realize the rapid treatment of the outlet water, at this moment, because the rainfall is always carried out, the combined/mixed water amount is always increased, the self-circulation system is closed, namely, the reflux control valve (7) and the reflux lift pump (8) are closed, and the outlet control valve (6) is opened to realize the rapid treatment and discharge of the excessive rain sewage. After the rainfall stops, the water level in the water collecting tank/the storage tank (1) is gradually reduced, when the water level is reduced to a certain low level, the water outlet control valve (6) is closed, the backflow control valve (7) and the backflow lifting pump (8) are opened to carry out self circulation, secondary treatment is carried out, the water quality of the discharged water is gradually improved, and the purpose of reducing pollutants is achieved.
Wherein, the composite reaction tank (5) comprises 3 layers, namely an aeration biological filter layer (5-2), an elastic packing layer (5-3), an ecological floating bed layer (5-4), a water inlet or a water inlet pipe (5-1), a water outlet or a water outlet pipe (5-5) and an aeration main pipe (5-6).
Wherein, the biological aerated filter layer (5-2) is mainly bagged filler (5-2-1), the diameter of the bagged filler is 0.05-0.10 m, and the diameter of the ceramsite filler is 0.001-0.005 m.
Wherein, the elastic packing layer (5-3-3) is internally provided with an elastic packing (5-3-2), an aeration microporous tube (5-3-3), a supporting structure (5-3-1) and the like. The number of the elastic fillers (5-3-2) is determined according to the plane area and the space, the shape can be square or cylindrical, and the diameter is 0.05-0.20 m; the aeration microporous pipe (5-3-3) is connected with an external aeration system, is made of a filamentous hose with the size of 0.0002-0.001 m, and has extremely fine pores with the diameter of 0.00005-0.0001 m; the elastic filler (5-3-2) and the aeration microporous tube (5-3-3) are arranged and connected on the supporting structure (5-3-1), and the supporting structure (5-3-1) plays a role in fixing.
The ecological floating bed layer (5-4) is composed of floating bed aquatic plants (5-4-1) and a floating bed body (5-4-2), the floating bed aquatic plants (5-4-1) can be selected from canna and the like, and the floating bed body (5-4-2) can be made of wood, plastic film structures and the like.
Example 3: the elastic packing layer (5-3) and the ecological floating bed layer (5-4) in the composite reaction tank (5) can be used as a river channel in-situ purification process by combining an aeration system (9) and is arranged near the confluence/mixed flow discharge port to realize the purification treatment of the rain sewage.
In summary, the combined flow and mixed flow rain sewage treatment method and system can effectively control combined flow and mixed flow rain sewage pollution, can quickly treat excess rain sewage exceeding the interception capacity of a pipe network (regulation and storage) system, and can be used as a treatment facility to efficiently treat the accumulated rain sewage. Through specific implementation, when the retention time is 4 hours, the removal rates of COD and NH3-N are respectively 80% and 50% or more, and the pollutants of the rainwater and sewage affecting the water quality can be greatly reduced.
Numerous specific details are set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. Also, many possible variations and modifications of the invention, or equivalent embodiments modified by the teachings herein, may be made by those skilled in the art without departing from the scope and spirit of the invention. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (2)
1. The utility model provides a confluence, mixed flow rain sewage treatment system which characterized in that: the system comprises:
the collecting tank/regulating and storing tank is used for collecting the combined flow/mixed flow rain sewage exceeding the municipal pipe network system;
the lifting pump is connected with the water collecting tank/the regulating and storing tank through a pipeline and is used for lifting the excessive rain sewage in the water collecting tank/the regulating and storing tank;
the composite reaction tank is used for treating the excessive rain sewage lifted by the lifting pump;
the drain valve is used for discharging the excessive rain sewage treated by the composite reaction tank; the backflow unit consists of a backflow control valve and a backflow lift pump which are connected in series; wherein, the reflux lift pump is connected with the water outlet of the composite reaction tank, and the output end of the reflux control valve is connected with the inlet of the water collecting tank/the storage tank;
the system works according to the following method:
judging whether the combined flow rain sewage in the current collecting tank/regulating storage tank exceeds a preset threshold value or not; if the temperature exceeds the preset threshold value, the wastewater is discharged after primary treatment through the composite reaction tank; if the temperature is not over, the preset threshold value is discharged after more than two times of treatment through the composite reaction tank; the composite reaction tank is provided with an ecological floating bed layer and an elastic filler layer which are communicated with each other from top to bottom in sequence; wherein, the combined flow rain sewage inlet of the composite reaction tank is positioned at the lower section of the elastic packing layer; the combined/mixed flow rain sewage outlet of the composite reaction tank is positioned at the upper section of the elastic packing layer or the junction of the ecological floating bed layer and the elastic packing layer;
or
Judging whether the combined flow rain sewage in the current collecting tank/regulating storage tank exceeds a preset threshold value or not; if the temperature exceeds the preset threshold value, the wastewater is discharged after primary treatment through the composite reaction tank; if the temperature is not over, the preset threshold value is discharged after more than two times of treatment through the composite reaction tank; the composite reaction tank is composed of an ecological floating bed layer, an elastic packing layer and an aeration biological filter layer which are communicated with each other from top to bottom in sequence; wherein, the confluence/mixed flow rain sewage inlet of the composite reaction tank is positioned on the aeration biological filter layer; the combined/mixed flow rain sewage outlet of the composite reaction tank is positioned at the upper section of the elastic packing layer or the junction of the ecological floating bed layer and the elastic packing layer;
wherein, bagged fillers exist in the aeration biological filter layer, the fillers are ceramsite, and the size of the ceramsite is 0.001-0.005 m in diameter
Wherein the elastic packing layer is composed of elastic packing, an aeration microporous tube and a supporting structure; the diameter of the elastic filler is 0.005-0.020 m; the aeration microporous pipe is connected with an external aeration system, the material of the aeration microporous pipe is a filamentous hose, the size of the hose is 0.0002-0.001 m, and the aperture of the opening is 0.00005-0.0001 m; the elastic filler and the aeration microporous pipe are arranged and connected on the supporting structure.
2. The combined and mixed flow rain sewage treatment system of claim 1, wherein an air outlet of an aeration system is arranged at the combined and mixed flow rain sewage outlet of the combined reaction tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641980.7A CN107265615B (en) | 2017-07-31 | 2017-07-31 | Confluence and mixed flow rain sewage treatment method and system |
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| CN201710641980.7A CN107265615B (en) | 2017-07-31 | 2017-07-31 | Confluence and mixed flow rain sewage treatment method and system |
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| CN107265615A CN107265615A (en) | 2017-10-20 |
| CN107265615B true CN107265615B (en) | 2021-07-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108439616A (en) * | 2018-06-05 | 2018-08-24 | 上海同瑞环保工程有限公司 | A kind of microbial treatment method improving municipal rain pipe, confluence of rainwater and sewage pipe, rain dirt mixed flow tube or municipal wastewater pipe discharge water quality |
| CN110054368A (en) * | 2019-05-29 | 2019-07-26 | 宜昌朗天新型建材有限公司 | A kind of sewage disposal system based on haydite production |
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|---|---|---|---|---|
| CN204310868U (en) * | 2014-10-17 | 2015-05-06 | 西南交通大学 | The biological floating bed waste disposal plant of a kind of micro-aeration reinforcing |
| CN204356190U (en) * | 2014-10-30 | 2015-05-27 | 杭州师范大学 | A kind of campus rainwater ecological purifying integral system |
| CN106395938A (en) * | 2016-11-30 | 2017-02-15 | 中冶华天工程技术有限公司 | Storm sewage treatment process and system for old area of city |
| CN106638887A (en) * | 2016-12-30 | 2017-05-10 | 武汉圣禹排水系统有限公司 | Zoning regulation and storage and online treatment system with obvious initial rainwater characteristics under flow splitting system and flow mixing system |
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2017
- 2017-07-31 CN CN201710641980.7A patent/CN107265615B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204310868U (en) * | 2014-10-17 | 2015-05-06 | 西南交通大学 | The biological floating bed waste disposal plant of a kind of micro-aeration reinforcing |
| CN204356190U (en) * | 2014-10-30 | 2015-05-27 | 杭州师范大学 | A kind of campus rainwater ecological purifying integral system |
| CN106395938A (en) * | 2016-11-30 | 2017-02-15 | 中冶华天工程技术有限公司 | Storm sewage treatment process and system for old area of city |
| CN106638887A (en) * | 2016-12-30 | 2017-05-10 | 武汉圣禹排水系统有限公司 | Zoning regulation and storage and online treatment system with obvious initial rainwater characteristics under flow splitting system and flow mixing system |
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