CN113620430A - Intelligent aeration type floating material module biological retention tank - Google Patents

Intelligent aeration type floating material module biological retention tank Download PDF

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Publication number
CN113620430A
CN113620430A CN202110902055.1A CN202110902055A CN113620430A CN 113620430 A CN113620430 A CN 113620430A CN 202110902055 A CN202110902055 A CN 202110902055A CN 113620430 A CN113620430 A CN 113620430A
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aeration
water
module
bioretention
pipe
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CN202110902055.1A
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CN113620430B (en
Inventor
张瑞斌
潘卓兮
刘清泉
徐强强
王乐阳
祖白玉
谭晓莲
史明
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Jiangsu Long Leaping Engineering Design Co ltd
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Jiangsu Long Leaping Engineering Design Co ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention relates to the technical field of rainwater treatment, and provides an intelligent aeration type floating material module bioretention tank. Comprises a planting area, a water purification area matched with the planting area, a water inlet and a water outlet. The water purification area includes: the aeration system, locate the slowly-releasing carbon-layer of aeration system below, locate a plurality of float modules of slowly-releasing carbon-layer bottom. The aeration system comprises a plurality of aeration modules and an air pressurizing device for controlling each aeration module; the water inlet is connected with each aeration module. The water outlet is connected with the slow-release carbon layer and is positioned on the same horizontal plane with the middle part of the slow-release carbon layer. The floating material module comprises a water storage net cage and light floating materials arranged in the water storage net cage. The invention solves the problems that the existing bioretention pond has poor stability in aerobic and anaerobic environments during operation and is easily influenced by alternation of dryness and wetness, thereby strengthening the effect of removing nitrogen, phosphorus and other organic pollutants in rainwater.

Description

Intelligent aeration type floating material module biological retention tank
Technical Field
The invention relates to the technical field of rainwater treatment, in particular to an intelligent aeration type floating material module bioretention tank.
Background
In the process of city construction, the waterproof cushion surface formed by concrete, asphalt and the like is beneficial to increasing the overall cleanliness and road surface bearing capacity of a city, but the waterproof cushion surface reduces the water permeability of the surface layer of the city, and particularly in areas with sufficient rainwater, the normal life of urban residents is influenced by the fact that rainwater is easily caused to flood.
The sponge city is a brand-new rainwater low-influence city development technology under the urban construction trend. The rainwater can be collected and stored, so that urban waterlogging caused by rainwater runoff is prevented; the rainwater collecting device can purify collected rainwater and can be released and utilized when the rainfall is small.
The biological detention pond is one of rainwater treatment facilities in the urban rainwater low-influence development technology, can be used for containing and detenting runoff rainwater, and improves the condition of waterlogging in the urban area; meanwhile, runoff rainwater accumulated in a stagnation mode can be purified through triple synergistic effects of plants, soil and microorganisms, so that rainwater runoff is reduced from the source, and pollutant migration is controlled. However, the existing bioretention pond has poor stability of aerobic and anaerobic environments inside, and the operation of the existing bioretention pond is easily affected by the alternation of dry and wet operation, so that the effect of removing organic pollutants such as nitrogen and phosphorus in rainwater is poor.
Disclosure of Invention
The invention provides an intelligent aeration type floating module bioretention pond for solving the problem of poor effect of removing organic matters such as nitrogen, phosphorus and the like in rainwater, and the effect of removing pollutants such as nitrogen, phosphorus and the like in rainwater is enhanced, so that the purification effect of the bioretention pond on runoff rainwater is enhanced.
In order to achieve the above purpose, the invention provides the following technical scheme:
an intelligent aeration type floating material module bioretention pond comprises a planting area, a water purification area matched with the planting area, a water inlet communicated with a surface runoff port and a water outlet communicated with a municipal rainwater pipeline; the water purification area includes:
the aeration system comprises a plurality of aeration modules arranged below the planting area, and an air pressurizing device connected with each aeration module through an aeration pipe; the water inlet is connected with each aeration module;
the water outlet is connected with the bottom of the slow-release carbon layer and is positioned on the same horizontal plane with the middle part of the slow-release carbon layer;
the floating modules are arranged at the bottom of the slow-release carbon layer and comprise a water storage net cage and light floating materials arranged in the water storage net cage.
The aeration system optimizes the aerobic environment of the biological detention tank and increases the oxygen content in the runoff rainwater passing through the aeration system, thereby promoting the organic matter degradation and ammoniation nitrification process of the runoff rainwater. The slow-release carbon layer forms an anoxic environment of the biological detention pool, has better adsorption capacity, and can provide a carbon source for denitrification reaction, so that the dephosphorization and denitrification process of the runoff rainwater is promoted. The water outlet structure arranged at the same height in the middle of the slow-release carbon layer enables an anaerobic environment to be formed below the slow-release carbon layer, and the denitrification process of the runoff rainwater is further optimized by combining the slow-release carbon layer. The biological detention pond optimizes the setting to aerobic, oxygen deficiency, anaerobic environment in the present biological detention pond simultaneously, makes each environment all has better stability in the biological detention pond, has reinforceed its dephosphorization denitrogenation effect to the runoff rainwater, has optimized its purification effect to the runoff rainwater.
The floating material module arranged at the bottom of the slow-release carbon layer stores water through the water storage net cage, and the light floating material is used for carrying out microbial biofilm formation. Therefore, the strain can be preserved in the drought period, and the operation of the bioretention pond is not influenced by alternation of dry and wet, so that the bioretention pond can normally operate under any environment. Thereby further optimizing the purification effect of the bioretention pond on the radial rainwater.
The bioretention pond is in under aeration systems, slowly-releasing carbon layer and flotation material module combined action, to on the whole the denitrogenation dephosphorization effect of bioretention pond has been reinforceed, makes it all have stable good oxygen, oxygen deficiency and anaerobic environment no matter in arid period or rainfall period to have excellent rainwater purifying effect.
Furthermore, the aeration system comprises an inductive switch which is arranged on the water inlet and used for controlling the air pressurizing device to be opened and closed.
The inductive switch is controlled by rainwater runoff, and when rainwater in runoff flows in the water inlet, the inductive switch controls the air pressurizing device to be started and enables the aeration system to operate; when no runoff rainwater flows in, the aeration system is stopped by controlling the air pressurizing device to be closed. The aeration system is started to operate only when runoff rainwater exists, so that the power consumption of the aeration system is reduced, personnel is not required to participate in the starting of the aeration system, and the intelligent and unmanned working process of the aeration system is realized.
Furthermore, each aeration module comprises an aeration head connected with the aeration pipe and a protective sleeve sleeved outside the aeration head; a plurality of water permeable holes are uniformly formed in the protective sleeve.
The protective sheath that is equipped with a plurality of holes of permeating water is favorable to preventing the foreign matter that carries in the runoff rainwater destroys the aeration head or causes the aeration head to block up to influence aeration systems's normal work, and because the hole of permeating water evenly locates on the protective sheath, consequently be favorable to improving gas-liquid interaction function, thereby improve aeration systems effect down the ammoniation nitration effect in bioretention pond.
Furthermore, the aeration modules are distributed in an array, the aeration modules in the same row or column are connected in series, and the aeration modules in different rows or columns are connected in parallel and are connected with the air pressurizing device through the main aeration pipe.
The distribution mode of the aeration modules in an array type and the connection mode of serial connection in the same row or column and parallel connection in different rows or columns are beneficial to enabling the air quantity obtained by each aeration module to be equal, so that the ammoniation and nitrification processes at all positions of the whole biological detention tank are consistent, and the denitrification effect of the biological detention tank is optimized.
Further, the water purification area comprises a gravel layer; the aeration modules are arranged in the gravel layer at intervals; the water inlet is arranged at the upper part of the gravel layer, and the aeration module is connected with the water inlet through the gravel layer.
In the water purification process, the runoff rainwater flows into the water inlet and is in contact with the aeration module through the gravel layer. Certain gaps are formed among the gravels in the gravel layer, so that runoff rainwater can be rapidly and uniformly dispersed, the runoff rainwater can be uniformly mixed with the aeration bubbles of the aeration module, and the ammonia nitrogen removal effect of the aeration system on the rainwater is optimized.
Furthermore, each floating material module comprises permeable cloth coated outside the water storage net cage.
The water permeable cloth coated outside the water storage net cage has a filtering effect, so that external impurities can be prevented from affecting strains in the water storage net cage; the water permeable cloth is favorable for reducing the evaporation effect of the water stored in the water storage net cage and improving the activity of strains in the drought period; thereby facilitating maintaining the stability of the anaerobic environment of the bioretention tank at any time.
Further, the light float is of a polygonal structure.
The polygonal structure of the light floating material provides rich sites for the biofilm formation of strains, and further optimizes the anaerobic environment of the bioretention tank, thereby further optimizing the water purification effect of the bioretention tank.
Further, a first geotextile layer is arranged at the top of the water purification area, and a second geotextile layer is arranged at the bottom of the water purification area; the water outlet is arranged on the lower side of the second geotextile layer, and the slow release carbon layer is connected with the water outlet through the second geotextile layer.
Because the first geotextile layer is arranged at the top of the water purification area, the influence on the aeration module of the aeration system caused by the impurities such as planting soil of the planting layer entering the aeration module can be prevented from being washed by rainwater, and the action effect of the aeration system can be influenced. Because the second geotechnique is laid in water purification district bottom, consequently be favorable to preventing that the rainwater from causing filler loss in the slowly-releasing carbon layer influences the effect of slowly-releasing carbon layer. And the water outlet is connected with the slow-release carbon layer through the second geotextile layer, so that the water outlet is prevented from being blocked by filler, and the water outlet function of the bioretention tank is influenced.
The intercepting pool comprises a settling zone and a water inlet zone which are mutually communicated, the settling zone is positioned below the ground surface runoff port, and the water inlet zone is communicated with the water inlet.
The cut-off basin comprises a sedimentation zone below the surface runoff opening and a water inlet zone communicated with the water inlet, so that the runoff rainwater firstly enters the sedimentation zone of the cut-off basin through the surface runoff opening, then enters the water inlet zone after sedimentation and enters the aeration system through the water inlet communicated with the water inlet zone. The sedimentation zone can be used for runoff rainwater pre-sedimentation, so that the pollutant concentration in the sedimentation zone can be reduced, and the plants in the planting zone can be prevented from being damaged; and the device is also favorable for removing silt and other impurities in the runoff rainwater, and prevents the blockage of an aeration system and influences the denitrification effect of the bioretention tank.
The drainage system comprises an overflow pipe, a water drawing pipe and a seepage pipe, wherein the overflow pipe is arranged in the planting area and the water purification area in a penetrating mode and is higher than the surface of the planting area; the water outlet is connected with the infiltration pipe.
The overflow pipe is higher than plant the district surface to link to each other with the delivery port through the infiltration pipe, consequently when the rainfall volume exceedes when the saturated rainfall volume that biological detention pond can hold, accessible overflow pipe makes the direct inflow municipal rainwater pipeline of earth's surface rainwater prevent surface ponding, thereby guarantees people daily trip safety. The water drawing pipe can be used for carrying out daily maintenance on the biological retention pond through water drawing in a period with less rainfall.
Has the advantages that:
(1) the biological retention tank comprises an aeration system arranged below the planting area, and the aerobic environment of the biological retention tank is optimized, so that the ammoniation and nitrification reaction processes in the denitrification process of the water purification area are increased.
(2) The bioretention pond provided by the invention comprises a slow-release carbon layer arranged below the aeration system, wherein the slow-release carbon layer forms an anoxic environment of the bioretention pond, and has better adsorption capacity while providing a carbon source for denitrification, so that the dephosphorization and denitrification processes of runoff rainwater are promoted.
(3) According to the biological retention tank, the water outlet which is arranged at the same height as the slow-release carbon layer is arranged below the slow-release carbon layer to form an anaerobic environment, so that the denitrification process of the runoff rainwater is further promoted under the combined action of the biological retention tank and the slow-release carbon layer.
(4) The bottom of the slow-release carbon layer of the bioretention pond is provided with a plurality of floating material modules which can store strains in a drought period, so that the operation of the bioretention pond is not influenced by alternation of dryness and wetness, and the bioretention pond can normally operate in any environment.
(5) The biological retention pond comprises a cut-off pond arranged at the water inlet, wherein the cut-off pond comprises a sedimentation area, can perform pre-sedimentation on radial rainwater, is favorable for reducing the concentration of pollutants in the rainwater and prevents the pollutants from damaging plants in a planting area; and the device is also favorable for settling silt and other impurities in rainwater, prevents the silt and other impurities from entering a water purification area to block the aeration system, and ensures the action effect in the working process of the aeration system.
(6) The bioretention pond comprises a drainage system, and when the runoff rainwater quantity of the exhaust system exceeds the saturation capacity of a water purification area, the overflow pipe of the exhaust system can directly guide the runoff rainwater into a municipal rainwater pipeline so as to prevent the rainwater on the road surface from accumulating; the water drawing pipe can be used for daily maintenance of the biological retention pond through the water drawing effect in the drought period.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the structure of a bioretention pond of the present invention.
Fig. 2 is a schematic structural diagram of the aeration module in fig. 1.
Fig. 3 is a schematic structural diagram of the connection mode of the aeration system in fig. 1.
Fig. 4 is a schematic structural diagram of the floating module in fig. 1.
In the figure, the reference numbers are that 1 is a planting area, 2 is a water purification area, 3 is a water inlet, 4 is a water outlet, 5 is a cut-off basin and 6 is a drainage system; 11 is a vegetation layer, 12 is a planting soil layer, 21 is a first geotechnical cloth layer, 22 is an aeration system, 23 is a gravel layer, 24 is a slow-release carbon layer, 25 is a floating material module, 26 is a second geotechnical cloth layer, 27 is a permeable layer, 41 is a water outlet pipe, 51 is a cover plate, 52 is a pool wall, 53 is a partition wall, 54 is a settling zone, 55 is a water inlet zone, 61 is an overflow pipe, 62 is a water drawing pipe, 63 is a seepage pipe, and 64 is a sewage interception pipe cap; 221 is an aeration module, 222 is an aeration pipe, 223 is an air pressurizing device, 224 is an induction switch, 251 is light floating material, 252 is a water storage net cage, 253 is permeable cloth, 511 is a rainwater grate, and 512 is a watertight plate; 221a is an aeration head, 221b is a protective sleeve, 221c is a joint, and 222a is a main aeration pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Similarly, the singular forms "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or the like, mean that the elements or items listed before "comprises" or "comprising" encompass the features, integers, steps, operations, elements, and/or components listed after "comprising" or "comprising," and do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly.
The invention provides an intelligent aeration type floating material module bioretention pond which comprises an aeration system connected with a water inlet, a slow release carbon layer arranged below the aeration system, a floating material module arranged at the bottom of the slow release carbon layer and a water outlet which is positioned at the same height as the middle part of the slow release carbon layer. The aeration system and the slow-release carbon layer simultaneously optimize the stability of aerobic, anoxic and anaerobic environments of the water purification area; the floating material module can store strains in a drought period, so that the operation of the biological detention pond is not influenced by alternation of dryness and wetness; so that the biological retention tank can perform strong dephosphorization and denitrification under any environment.
As shown in fig. 1-4, the bioretention pond includes a planting area 1, a water purification area 2, a water inlet 3, and a water outlet 4. The water inlet 3 and the planting area 1 are used for realizing water inlet of the bioretention pond, and the planting area 1 is matched with the water purifying area 2 and is used for realizing water storage, water purification and water seepage of the bioretention pond; the water outlet 4 is used for realizing water outlet of the biological retention tank.
Specifically, the water purification area 2 comprises an aeration system 22 arranged below the planting area 1, a slow-release carbon layer 24 arranged below the aeration system 22, and a floating module 25 arranged at the bottom of the slow-release carbon layer 24. The water inlet 3 is connected with the aeration system 22, and the water outlet 4 is connected with the slow-release carbon layer 24 and is positioned on the same horizontal plane with the middle part of the slow-release carbon layer 24.
The aeration system 22 optimizes the aerobic environment of the bioretention tank and increases the oxygen content in the runoff rainwater passing through the aeration system 22, thereby promoting the organic matter degradation and ammoniation nitrification process of the runoff rainwater. The slow-release carbon layer 24 forms an anoxic environment of the bioretention pond, has good adsorption capacity, and can provide a carbon source for denitrification reaction, so that the dephosphorization and denitrification processes of the runoff rainwater are promoted. The structure of the water outlet 4 which is arranged at the same height as the middle part of the slow release carbon layer 24 forms an anaerobic environment below the slow release carbon layer 24, and the denitrification process of the runoff rainwater is further optimized by combining the slow release carbon layer 24. The biological detention pond optimizes the setting to aerobic, oxygen deficiency, anaerobic environment in the present biological detention pond simultaneously, makes each environment all has better stability in the biological detention pond, has reinforceed its dephosphorization denitrogenation effect to the runoff rainwater, has optimized its purification effect to the runoff rainwater.
The floating material module 25 arranged at the bottom of the slow-release carbon layer 24 has a water storage function and can be used for carrying out microbial biofilm formation. Therefore, the strain can be preserved in the drought period, and the operation of the bioretention pond is not influenced by alternation of dry and wet, so that the bioretention pond can normally operate under any environment. Further optimizing the purification effect of the bioretention pond on the radial rainwater.
The bioretention pond is in under aeration systems 22, slowly-releasing carbon layer 24 and flotation material module 25 combined action, is on the whole to the denitrogenation dephosphorization effect of bioretention pond has been reinforceed, makes it all have stable good oxygen, oxygen deficiency and anaerobic environment no matter in the arid period or rainfall period, thereby makes the bioretention pond has excellent rainwater purifying effect.
Specifically, the aeration system 22 includes a plurality of aeration modules 221, an air pressurizing device 223 connected to each aeration module 221, and an aeration pipe 222 for connecting the aeration modules 221 and the air pressurizing device 223. The water inlet 3 is connected to each aeration module 221.
Because the water inlet 3 is connected with the aeration module 221, runoff rainwater firstly enters the aeration module 221 from the water inlet 3, and under the combined action of the air pressurization device 223, the runoff rainwater is mixed with aeration bubbles in the aeration module 221, so that the degradation of organic matters in the runoff rainwater and the ammoniation and nitrification process are promoted, and the removal effect of ammonia nitrogen in the rainwater is improved. And the aeration module 221 can supply oxygen to the root of the vegetation layer 11 of the planting area 1, and enhance the purification effect of the vegetation layer 11 on the seepage rainwater.
Specifically, the aeration system 22 further includes a sensing switch 224, and the sensing switch 224 is disposed on the water inlet 3 and is used for sensing runoff rainwater to control the opening and closing of the air pressurizing device 223. When runoff rainwater flows into the water inlet 3, the inductive switch 224 controls the air pressurizing device 223 to be opened, and the aeration system 22 is operated; when no runoff rainwater flows in, the aeration system 22 is stopped by controlling the air pressurizing device 223 to be closed. Therefore, the aeration system 22 is started to operate only when runoff rainwater exists, the power consumption of the aeration system 22 is reduced, personnel are not needed to participate in the starting of the aeration system 22, and the intelligent and unmanned working process of the aeration system 22 is realized.
Specifically, as shown in fig. 2, each aeration module 221 includes an aeration head 221a, a connector 211c for connecting the aeration head 221a with the aeration pipe 222, and a protective sleeve 221b sleeved outside the aeration head 221 a; and a plurality of water permeable holes are uniformly arranged on the protective sleeve 221 b. In this embodiment, the material of the aeration head 221a is PE, the protective cover 221b is made of stainless steel with a thickness of 2cm, and the water permeable holes on the protective cover 221b are circular holes with a diameter of 1 cm.
The protecting sleeve 221b provided with the plurality of water permeable holes is favorable for preventing impurity particles carried in runoff rainwater from damaging the aeration head 221a or blocking the aeration head 221a, so that the normal work of the aeration system 22 is influenced, and the water permeable holes are uniformly arranged on the protecting sleeve 221b, so that the gas-liquid interaction function is favorably improved, and the ammonification effect of the biological retention tank under the action of the aeration system 22 is improved.
Specifically, as shown in fig. 3, the aeration modules 221 are distributed in an array, and the aeration modules 221 located in the same row or column are connected in series, and the aeration modules 221 located in different rows or columns are connected in parallel and connected to the air pressurizing device 223 through the main aeration pipe 222 a. The distribution mode of the aeration modules 221 in an array type and the connection mode of serial connection in the same row or column and parallel connection in different rows or columns are beneficial to enabling the air quantity obtained by each aeration module 221 to be equal, so that the ammoniation and nitrification processes at all positions of the whole biological detention tank are consistent, and the denitrification effect of the biological detention tank is optimized.
Specifically, the water purification area 2 includes a gravel layer 23, and the aeration modules 221 are spaced in the gravel layer 23. In this embodiment, the gravel layer 23 has a thickness of 20 to 30cm and is composed of gravel having a particle size of 3 to 5 cm. The aeration module 221 is adjacent to the planting area 1 through the gravel layer 23, the water inlet 3 is arranged at the upper part of the gravel layer 23, and the aeration module 221 is connected with the water inlet 3 through the gravel layer 23. During the water purification process, the runoff rainwater flows into the water inlet 3 and contacts the aeration module 221 through the gravel layer 23. Due to the fact that certain gaps are formed among the gravels of the gravel layer 23, runoff rainwater can be rapidly and uniformly dispersed, so that the runoff rainwater can be uniformly mixed with the aeration bubbles of the aeration module 221, and the ammonia nitrogen removal effect of the aeration system 22 on the rainwater is optimized.
Specifically, the water purification area 2 includes a first geotextile layer 21 disposed on the top thereof. The first geotextile layer 21 is beneficial to preventing impurities such as planting soil of the planting soil layer 12 from entering the aeration module 221 of the aeration system 22 to affect the impurities due to rain wash, so that the action effect of the aeration system 22 is affected.
Specifically, the water purification area 2 further comprises a second geotextile layer 26 arranged at the bottom of the water purification area, and a permeable layer 27 arranged below the second geotextile layer 26 and connected with the water outlet 4. The permeable stratum 27 is used for discharging the runoff rainwater after purifying, the second geotechnological cloth layer 26 then is favorable to preventing that the granule of slowly-releasing carbon layer 24 from getting into permeable stratum 27, causes the permeable stratum 27 to block up, and is favorable to preventing slowly-releasing carbon layer 24's material loss to reduce dephosphorization and denitrification process, influence the dephosphorization denitrogenation ability in biological detention pond.
Specifically, the thickness of the slow-release carbon layer 24 is 40-60cm, and the slow-release carbon layer is composed of slow-release carbon particles with the particle size of 1-2 cm. The slow-release carbon particles are prepared by mixing biochar, corncobs and planting soil according to the ratio of 3:3: 4.
Specifically, the floating material module 25 includes a water storage net cage 252 and a plurality of light floating materials 251 disposed in the water storage net cage 252. The water storage net cage 252 is made of high molecular polymer and has good structural stability, so that the water storage net cage has high pressure bearing capacity and a high using effect. The light floating material 251 is a polygonal high-molecular polymer, and the huge surface area of the polygonal structure provides rich sites for anaerobic bacteria biofilm culturing, so that the anaerobic environment of the biological detention tank is optimized.
Specifically, the floating material module 25 includes a water permeable cloth 253 wrapping the outside of the water storage net cage 252. The water permeable cloth 253 coated outside the water storage net cage 252 has a filtering effect, so that external impurities can be prevented from affecting strains in the water storage net cage; the water permeable cloth 253 is beneficial to reducing the evaporation effect of the water stored in the water storage net cage 252, and the activity of strains in the drought period is improved; thereby facilitating maintaining the stability of the anaerobic environment of the bioretention tank at any time.
Specifically, the bioretention pond further comprises a cut-off pond 5, wherein the cut-off pond 5 is arranged at the water inlet 3 and is enclosed by a pond wall 52 and a cover plate 51 arranged on the pond wall 52, and the interior of the cut-off pond is divided into a settling area 54 and a water inlet area 55 which are communicated with each other through a partition wall 53. Specifically, the cover plate 51 is composed of a rain grate 511 and a watertight plate 512, and the rain grate 511 is a ground surface runoff port. The settling zone 54 is positioned below the rainwater grate 511; the water inlet area 55 is located below the watertight plate 512 and is communicated with the water inlet 3. In the embodiment, the height of the whole intercepting pool 5 is 30-40cm, and the width is 40 cm; the height of the dividing wall 53 is 2/3 of the height of the catch basin 5.
Since the cut-off basin 5 comprises a settling zone 54 located below the surface runoff port and a water inlet zone 55 communicated with the water inlet 3, the runoff rainwater will firstly enter the settling zone 54 of the cut-off basin 5 through the surface runoff port, then enter the water inlet zone 55 after settling, and enter the aeration system 22 through the water inlet 3 communicated with the water inlet zone 55. The sedimentation zone 54 can be used for runoff rainwater pre-sedimentation, so that the concentration of pollutants in the runoff rainwater pre-sedimentation is reduced, and the plants in the planting zone 1 are prevented from being damaged; and the device is also favorable for removing silt and other impurities in the runoff rainwater, and prevents the blockage of the aeration system 22 and influences the denitrification effect of the bioretention tank.
In particular, the bioretention pond further comprises a drainage system 6. The drainage system 6 comprises an overflow pipe 61 which is arranged in the planting area 1 and the water purification area 2 in a penetrating way and is higher than the surface of the planting area 1, a water drawing pipe 62 arranged in the overflow pipe 61, and a seepage pipe 63 which is arranged below the water purification area 2 and is connected with the overflow pipe 61 and the water drawing pipe 62; the water outlet 4 is connected with the seepage pipe 63 through a water outlet pipe 41. In this embodiment, the overflow pipe 61 is 10-15cm higher than the surface of the planting layer 11, and the diameter of the water drawing pipe 62 is 1/5 of the overflow pipe 61. Overflow pipe 61 is higher than 1 surface in planting district to link to each other with delivery port 4 through oozing pipe 63, consequently when the rainfall volume surpass during the saturated rainfall volume that biological detention pond can hold, surface runoff accessible overflow pipe 61 directly flows in municipal rainwater pipeline, prevents surface ponding, thereby has guaranteed people daily trip safety. The water drawing pipe 62 can be used for daily maintenance of the biological retention pond through water drawing in a period with less rainfall, and can also be used for water supplement of a submerged area through the water drawing pipe 62 in a dry period so as to maintain the efficiency of the biological retention pond.
Specifically, the end of the overflow pipe 61 is further provided with a sewage intercepting pipe cap 64 for filtering impurities in the runoff rainwater and preventing the impurities from blocking the overflow pipe 61. And the sewage interception pipe cap 64 is directly connected with the overflow pipe 61, so that the sewage interception pipe cap is convenient to disassemble and maintain.
The application test is carried out on the biological retention tank shown in the attached drawing, and suspended matters (SS), Chemical Oxygen Demand (COD), Total Phosphorus (TP) and ammonia Nitrogen (NH) are used3-N) and Total Nitrogen (TN) are evaluation indexes, and test results show that the bioretention pond disclosed by the invention can be used for treating Suspended Substances (SS), Chemical Oxygen Demand (COD), Total Phosphorus (TP) and ammonia Nitrogen (NH) in rainwater runoff3Average removal rates of-N) and Total Nitrogen (TN) are respectively 96.42%, 92.20%, 97.24%, 94.65% and 82.43%, and the purification effect is remarkable.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims (10)

1. An intelligent aeration type floating material module bioretention pond is characterized by comprising a planting area, a water purification area matched with the planting area, a water inlet communicated with a surface runoff port and a water outlet communicated with a municipal rainwater pipeline; the water purification area includes:
the aeration system comprises a plurality of aeration modules arranged below the planting area, and an air pressurizing device connected with each aeration module through an aeration pipe; the water inlet is connected with each aeration module;
the water outlet is connected with the bottom of the slow-release carbon layer and is positioned on the same horizontal plane with the middle part of the slow-release carbon layer;
the floating material modules are arranged at the bottom of the slow-release carbon layer and comprise a water storage net cage and light floating materials arranged in the water storage net cage.
2. The intelligent aerated module bioretention tank of claim 1 wherein the aeration system includes a sensor switch on the water inlet for controlling the air pressurization device to be turned on and off.
3. The intelligent aerated floating module bioretention tank of claim 1 wherein each aeration module includes an aeration head connected to the aeration pipe and a protective sleeve sleeved outside the aeration head; a plurality of water permeable holes are uniformly formed in the protective sleeve.
4. The intelligent aerated floating module bioretention pond of claim 1 wherein the aeration modules are distributed in an array, and the aeration modules in the same row or column are connected in series, and the aeration modules in different rows or columns are connected in parallel and connected to the air pressurizing device through the main aeration pipe.
5. The intelligent aerated flotation module bioretention tank of claim 1 wherein the water purification zone includes a gravel layer; the aeration modules are arranged in the gravel layer at intervals, the water inlet is arranged at the upper part of the gravel layer, and the aeration modules are connected with the water inlet through the gravel layer.
6. The intelligent aerated flotation module bioretention tank of claim 1 wherein each flotation module includes a permeable cloth that is wrapped outside the water holding cage.
7. The intelligent aerated flotation module bioretention tank of claim 1 wherein the light-weight flotation is polygonal in structure.
8. The intelligent aeration type floating material module bioretention pond of claim 1 wherein a first geotextile layer is arranged on the top of the water purification zone, and a second geotextile layer is arranged on the bottom of the water purification zone; the water outlet is arranged on the lower side of the second geotextile layer, and the slow-release carbon layer is connected with the water outlet through the second geotextile layer.
9. The intelligent aerated float module bioretention tank of claim 1 further comprising a cut-off tank disposed at the water inlet, the cut-off tank including a settling zone and a water inlet zone in communication with each other, the settling zone being located below the surface runoff port, the water inlet zone being in communication with the water inlet.
10. The intelligent aeration type floating material module bioretention pond of claim 1 further comprising a drainage system, wherein the drainage system comprises an overflow pipe, a water drawing pipe and a seepage pipe, the overflow pipe is arranged in the planting area and the water purifying area and is higher than the surface of the planting area, the water drawing pipe is arranged in the overflow pipe, and the seepage pipe is arranged below the water purifying area and is connected with the overflow pipe and the water drawing pipe; the water outlet is connected with the infiltration pipe.
CN202110902055.1A 2021-08-06 2021-08-06 Intelligent aeration type floating material module biological retention tank Active CN113620430B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106830506A (en) * 2017-01-24 2017-06-13 河海大学 A kind of intensified denitrification and dephosphorization biology delaying basin for being applied to sponge urban construction
CN106930397A (en) * 2017-03-07 2017-07-07 河海大学 A kind of biological delaying basin that early-stage rainwater can be persistently processed within the dry spell
CN107265630A (en) * 2017-06-27 2017-10-20 河海大学 A kind of two-way seepage flow biological delaying basin of internal retaining post
CN107628731A (en) * 2017-11-01 2018-01-26 湖南大辰环保科技有限公司 Strengthen runoff pollution ecology minimizing technology and roof garden in a kind of roof garden
CN108409027A (en) * 2018-01-19 2018-08-17 江苏大学 A kind of biological delaying basin for strengthening road Initial Runoff denitrogenation dephosphorizing process
WO2018171842A2 (en) * 2017-03-24 2018-09-27 Hahn Guenter Water storage system for arid regions
CN110745951A (en) * 2019-11-18 2020-02-04 南京工业大学 Biological detention pond with dephosphorization and deodorization functions
WO2021036458A1 (en) * 2019-08-30 2021-03-04 中清信益环境(南京)有限公司 Efficient self-circulation biological denitrification device and working method therefor
US20210188677A1 (en) * 2017-12-13 2021-06-24 Chinese Research Academy Of Environmental Sciences Method and device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106830506A (en) * 2017-01-24 2017-06-13 河海大学 A kind of intensified denitrification and dephosphorization biology delaying basin for being applied to sponge urban construction
CN106930397A (en) * 2017-03-07 2017-07-07 河海大学 A kind of biological delaying basin that early-stage rainwater can be persistently processed within the dry spell
WO2018171842A2 (en) * 2017-03-24 2018-09-27 Hahn Guenter Water storage system for arid regions
CN107265630A (en) * 2017-06-27 2017-10-20 河海大学 A kind of two-way seepage flow biological delaying basin of internal retaining post
CN107628731A (en) * 2017-11-01 2018-01-26 湖南大辰环保科技有限公司 Strengthen runoff pollution ecology minimizing technology and roof garden in a kind of roof garden
US20210188677A1 (en) * 2017-12-13 2021-06-24 Chinese Research Academy Of Environmental Sciences Method and device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage
CN108409027A (en) * 2018-01-19 2018-08-17 江苏大学 A kind of biological delaying basin for strengthening road Initial Runoff denitrogenation dephosphorizing process
WO2021036458A1 (en) * 2019-08-30 2021-03-04 中清信益环境(南京)有限公司 Efficient self-circulation biological denitrification device and working method therefor
CN110745951A (en) * 2019-11-18 2020-02-04 南京工业大学 Biological detention pond with dephosphorization and deodorization functions

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