CN108689499A - It is a kind of to be detained pool structure and construction method with the rainwater biology for flooding layer - Google Patents

It is a kind of to be detained pool structure and construction method with the rainwater biology for flooding layer Download PDF

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Publication number
CN108689499A
CN108689499A CN201810854105.1A CN201810854105A CN108689499A CN 108689499 A CN108689499 A CN 108689499A CN 201810854105 A CN201810854105 A CN 201810854105A CN 108689499 A CN108689499 A CN 108689499A
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China
Prior art keywords
layer
transition zone
rainwater
drainage blanket
detained
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CN201810854105.1A
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Chinese (zh)
Inventor
胡玖坤
李秀玉
王淼
张科峰
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Jiangsu Easthigh Environment Holdings Ltd
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Jiangsu Easthigh Environment Holdings Ltd
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Priority to CN201810854105.1A priority Critical patent/CN108689499A/en
Publication of CN108689499A publication Critical patent/CN108689499A/en
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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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • 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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C02F3/341—Consortia of bacteria
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms

Abstract

The present invention provides a kind of with the rainwater biology delay pool structure and construction method that flood layer, it is mainly used in the controlling area-source pollution that rainfall runoff flood peak is cut down and rainfall runoff is brought, purified including city and rural area Introduced cases pollution of area source, the delaying basin set gradually from top to bottom for:Retention layer, filter layer, transition zone and drainage blanket, successively sequential build from bottom to top;The retention layer is for storing rainwater, equal filled media raw material in transition zone, filter layer and drainage blanket;The transition zone and drainage blanket have as layer is flooded and effectively store rainwater, provide anaerobic environment, enhance contaminant removal capacity;There is inherent contacts between each layer filler in the pond of the present invention, and have specific size distribution profile for filler.In addition, each layer is mixed with the fertilizer for plant growth, adsorption particle, slow release carbon source and complex microorganism preparations or complex microorganism embedded particles in pond, ensure that biological delaying basin can for a long time, efficiently handle the polluter in rainwater, especially has significant effect to denitrogenation dephosphorizing.

Description

It is a kind of to be detained pool structure and construction method with the rainwater biology for flooding layer
Technical field
The present invention relates to technical field of water environment treatment, especially one kind can be used in effectively reducing rainfall runoff peak value and Volume, and effectively remove the nutriments such as contained solid suspension, nitrogen, phosphorus, heavy metal, pathogen, hydrocarbonization in runoff pollution The rainwater biology delaying basin of object and the filterability facility of some micro quantity organic pollutants is closed, specifically a kind of carry floods layer Rainwater biology be detained pool structure and construction method.
Background technology
The rainwater biology delaying basin implemented at this stage largely uses soil or sand mixture cultivated plant, and passes through The rainwater oozed under nature in root system of plant processing pond body generally uses opening Design, i.e., by pond body surface collection rainwater, certainly It is oozed into Soil Surrounding environment under so.Due to limited infiltration rate and storage space, the rainfall runoff in system can not store up It can occur excessive to pond body periphery in the case of depositing excessive rainwater, can not both collect a large amount of rainwater of processing, and to pollutant Processing capacity is also extremely limited, especially in the shallower area of level of ground water (River Network), it is micro- to the ability of rainwater treatment its It is micro-.Moreover, the growing environment that this design also results in plant is not sufficiently stable, can not in the less arid area of rainwater It protects and stores enough water source, plant needs to irrigate to ensure to grow needs when drought period.
Moreover, internal blockage problem occurs in actual operation for a large amount of constructed rainwater biology delaying basins, for rain The processing of water produces certain negative influence, or even causes secondary pollution.The reason of causing this phenomenon is mainly existing stagnant It stays the filler of facility not fully consider the property of layering filler, does not carry out the design and test of science.For pollutant input compared with For the region of concentration, design originally also cannot achieve efficient pollutant removal.Therefore, be preferably meet rainwater treatment and Water environment treatment demand need to consider more to enhance the effect to rainwater-collecting and pollutant removal, to obtain cleaning Water source supplement.
Invention content
It is open biological gaseous-waste holdup system the purpose of the present invention is being directed to traditional rainwater biology delaying basin, it is internal frequent occurrence It blocks, can not save water source leads to the problems such as dry season plant growth is difficult, and pollutant process effect is poor, proposes that a kind of carry is flooded The rainwater biology of layer is detained pool structure and construction method.
The technical scheme is that:
It is a kind of to be detained pool structure with the rainwater biology for flooding layer, set gradually from top to bottom in the delaying basin for:It is detained Layer, filter layer, transition zone and drainage blanket, foregoing transition layer and drainage blanket, which are used as, floods layer;The retention layer is used for rainfall thing Store rainwater when part in short term, equal filled media raw material in filter layer, transition zone and drainage blanket, under selected media stock meets State screening conditions, D15Indicate the size for the strainer for making the medium of 15% mass be detained, D85Expression makes the medium of 85% mass be detained Strainer size;
Media stock selected by filter layer and transition zone meets following screening conditions:
D15(transition zone)≤5 × D85(filter layer);
Media stock selected by transition zone and drainage blanket meets following screening conditions:
D15(drainage blanket)≤5 × D85(transition zone).
Further, the filler of filter layer, transition zone and drainage blanket is satisfied by following conditions:pH:5.5~7.5;Total nitrogen contains Measure <1000mg/kg;Lin Suanyanhanliang <80mg/kg;You Jizhihanliang <5%, the wherein particle diameter distribution of filter layer should meet table 1:
Table 1
Screen mesh size (μm) It is detained the percentage of sieve
Soil <50 <3%
Fines 50-150 5-30%
Fine grained 150-250 10-30%
Medium fine grained 250-500 40-60%
Coarse granule 500-1000 25%
Pole coarse granule 1000-2000 0-10%
Bulky grain 2000-3400 <3%
Further, the setting for flooding layer is increased;It includes drainage blanket and transition zone to flood layer, highly passes through collector pipe Water outlet height setting is realized;Collector pipe is divided into two parts, and the part for being distributed in pool bottom is designed as perforated pipe, outside pond body It is divided into not perforated pipe;The lower section of drainage blanket is connected to rain collection well by collector pipe, and the rain saved is collected in rain collection well Water extracts reuse by water pump;The height of the collector pipe water outlet and the upper surface for flooding layer are mutually neat, aforementioned collector pipe Straight pipe end is equipped with blow valve;Delaying basin side wall above retention layer is equipped with the first overflow port, and first overflow port is logical Piping connection is crossed to municipal Storm Sewer Network;The second overflow port is arranged in the side wall of rain collection well, and aforementioned second overflow port passes through pipe Road is connected to municipal Storm Sewer Network;The lower surface of second overflow port is not higher than the upper surface for flooding layer.
Further, it is 200-300mm to be detained layer height;Filtering layer height is 400-600mm;Transition layer height is 200- 300mm;Draining layer height is 100-200mm.
Further, filter layer adds the fertilizer for plant growth from 0~100mm depths of the upper surface under;Often 100m2Fertilizer of the 0~82kg for plant growth is added in the filler of surface area;Containing such as in the fertilizer for plant growth Lower ingredient:Animal organic manure 61%, calcium superphosphate 2.4%, magnesium sulfate 3.7%, potassium sulfate 2.4%, trace element 1.2%, Nitrogen, phosphorus and potassium fertilizer 4.9%, quick lime 24.4%.
Further, adsorption particle, preferably activated carbon and zeroth order iron mixture or zeolite are added in filter layer filler middle level With zeroth order iron mixture;The two mass ratio is 5:1, mixture quality is the 3%~5% of filter layer packing quality.
Further, slow release carbon source and complex microorganism preparations are added in transition zone filler or by complex microorganism Multilayer embedded particles prepared by preparation, slow release carbon source and chitosan, quality account for the 1%~3% of transition zone filler.
A kind of construction method being detained pool structure with the rainwater biology for flooding layer, this approach includes the following steps:
Impervious barrier is arranged in S1, structure pond body, pond body side wall, be sequentially disposed in from top to bottom in pond body drainage blanket, transition zone, Filter layer, retention layer are highly respectively:100-200mm;200-300mm,400-600mm,200-300mm;
S2, it takes media stock to be numbered, sieving processing is carried out to several media stock using multilayer screen cloth, obtain each The size distribution curve of kind media stock;Wherein, the multilayer screen cloth number of plies is no less than 6 layers, and from top to bottom, aperture is sequentially reduced;Its In, the sieve of maximum diameter of hole is about 3400 microns, and the sieve of minimum-value aperture is about 50 microns;
S3, when obtaining the sieving processing of each media stock respectively according to aforementioned particle size distribution curve, 15% and 85% can be made The strainer dimension D that the medium of quality is detained15iAnd D85i, the number of i expression media stocks;
S4, according to table 1 the configurating filtered layer of particle diameter distribution filtrate;
S5, according to the D of each filtrate raw material15iAnd D85iScreening can fill the media stock of transition zone and drainage blanket, transition Media stock selected by layer and drainage blanket meets following screening conditions respectively:
D15(transition zone)≤5 × D85(filter layer);
D15(drainage blanket)≤5 × D85(transition zone)
Wherein:D15Indicate the size for the strainer for making the medium of 15% mass be detained;D85Expression keeps the medium of 85% mass stagnant The size of the strainer stayed;
S6, select at least one as corresponding drainage blanket in the media stock for meeting drainage blanket, to carry out drainage blanket Filling;Select at least one as corresponding transition zone in the media stock for meeting transition zone, to carry out transition zone filling;It adopts It is filtered layer filling with the medium of step S4 configurations, sequence from top to bottom is to complete the structure of rainwater biology delaying basin.Into One step, organic fertilizer is added on filter layer surface layer, activated carbon and Zero-valent Iron or zeolite and Zero-valent Iron are added in middle level;In mistake It crosses in layer and adds slow release carbon source and complex microorganism preparations or by complex microorganism preparations, slow release carbon source and chitosan system Standby multilayer embedded particles, quality account for the 1%~3% of transition zone filler.
Beneficial effects of the present invention:
Not permeable outer wall around the rainwater biology delaying basin setting of the present invention ensures to be complete impermeable inside biological delaying basin Hydrospace;The setting of drainpipe water outlet away from bottom 400mm or so eminence, can ensure that biological delaying basin bottom remains in this way Layer is flooded, the setting of layer is flooded, ensure that at non-prolonged drought corresponding height persistently there is water, ideal anaerobism is provided Environment, medium flood the growth that can ensure anaerobe into water for a long time, increase nitrification and denitrification effect, promote denitrogenation Dephosphorization ability.In addition, flooding layer by setting, biological delaying basin deposit moisture can be made, ensure that plant can hold in drought period Continuous growth.
Compounded mix is used in the pond of the present invention, there is inherent contact between each layer filler, can be improved to inputting The treatment effeciency of runoff;Enhance physics processing capacity (suction-operated), chemical processability (redox reaction), biological treatment Ability (microbial biochemical reaction) improves denitrogenation dephosphorizing efficiency;Good biological ecological environment in filler is promoted to be formed, when enhancing long Between denitrogenation dephosphorizing efficiency, detergent power can be kept for a long time, be not easy to plug, good biological cleaning local environment is formed.
It is of the present invention effectively to reduce rainfall runoff peak value and volume with the rainwater biology delaying basin for flooding layer, Dispersion short-time storm collects flow, and improves the treatment effeciency to inputting runoff;It, can be effective while enhancing denitrogenation dephosphorizing effectiveness Oil removal, heavy metal, organic matter, pathogen, hydrocarbon and some micro quantity organic pollutants are removed, runoff rainwater is purified, Realize the reuse of water;Since the effect of plant increases bio-diversity, Landscape benefit is provided, and improves local microcosmic gas It waits, reduces tropical island effect.For economy, the delaying basin is cost-effective, because its good performance can reduce maintenance cost, and Produced modularization in batches can be further realized.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label Typically represent same parts.
Fig. 1 shows the structural schematic diagram of the present invention.
Fig. 2 shows the grading curve schematic diagrames of candidate dielectric.
Fig. 3 shows in embodiment one, solid suspension TSS concentrations versus's curves before and after five continuous natural precipitation events.
Fig. 4 shows in embodiment one, total nitrogen TN concentrations versus's curves before and after five continuous natural precipitation events.
Fig. 5 shows in embodiment one, total phosphorus TP concentrations versus's curves before and after five continuous natural precipitation events.
Fig. 6 shows in embodiment two, 12 front and back solid suspension TSS concentrations versus's curves of catchments water inlet.
Fig. 7 shows in embodiment two, 12 front and back total nitrogen TN concentrations versus's curves of catchments water inlet.
Fig. 8 shows in embodiment two, 12 front and back total phosphorus TP concentrations versus's curves of catchments water inlet.
Fig. 9 shows in embodiment three, solid suspension TSS concentrations versus's curves before and after six continuous natural precipitation events.
Figure 10 shows in embodiment three, total nitrogen TN concentrations versus's curves before and after six continuous natural precipitation events.
Figure 11 shows in embodiment three, total phosphorus TP concentrations versus's curves before and after six continuous natural precipitation events.
In figure:1, retention layer;2, filter layer;3, transition zone;4, drainage blanket;5, layer is flooded;6, impervious barrier;7, cobblestone; 8, greenery patches;9, the first overflow port;10, collector pipe;11, rain collection well;12, the second overflow port;13, water pump;14, blow valve; 15, sighting tube.
Specific implementation mode
The preferred embodiment of the present invention is described below, may be realized in various forms the present invention without that should be explained here The embodiment stated is limited.
It is a kind of to be detained pool structure with the rainwater biology for flooding layer, set gradually from top to bottom in the delaying basin for:It is detained Layer 1, filter layer 2, transition zone 3 and drainage blanket 4, foregoing transition layer 3 and drainage blanket 4, which are used as, floods layer 5;The retention layer 1 is used Store rainwater in short term when catchment, equal filled media raw material in filter layer 2, transition zone 3 and drainage blanket 4, selected Jie Matter raw material meets following screening conditions, D15Indicate the size for the strainer for making the medium of 15% mass be detained, D85Expression makes 85% matter The size for the strainer that the medium of amount is detained;
Media stock selected by filter layer 2 and transition zone 3 meets following screening conditions:
D15(transition zone)≤5 × D85(filter layer);
Media stock selected by transition zone 3 and drainage blanket 4 meets following screening conditions:
D15(drainage blanket)≤5 × D85(transition zone).
Further, the delaying basin side wall of 1 top of retention layer is equipped with the first overflow port 9, and first overflow port 9 passes through Piping connection to municipal Storm Sewer Network, the lower section of drainage blanket 4 is connected to rain collection well 1 by perforated catchment pipe 10;Flood layer 5 Including drainage blanket 4 and transition zone 3, highly it is arranged by the water outlet height of collector pipe 10 and is realized;Collector pipe 10 divides for two parts, The part for being distributed in pool bottom is designed as perforated pipe, and not perforated pipe is divided into outside pond body;The lower section of drainage blanket 4 passes through collector pipe 10 are connected to rain collection well 11, and the rainwater saved is collected in rain collection well 11 and extracts reuse by water pump 13;The collection The height of 10 water outlet of water pipe and the upper surface for flooding layer 5 are mutually neat, and the straight pipe of aforementioned collector pipe 10 is equipped with blow valve 14;It is detained The delaying basin side wall of 1 top of layer is equipped with the first overflow port 9, and first overflow port 9 passes through piping connection to municipal rain pipe Net;The second overflow port 12 is arranged in the side wall of rain collection well 11, and aforementioned second overflow port 12 passes through piping connection to municipal rainwater Pipe network;The lower surface of second overflow port 12 is not higher than the upper surface for flooding layer 5.
In pond body, 1 height of retention layer is 200-300mm;2 height of filter layer is 400-600mm;3 height of transition zone is 200-300mm;4 height of drainage blanket is 100-200mm.Not permeable outer wall around the rainwater biology delaying basin setting of the present invention, Ensure inside biological delaying basin to be totally-enclosed space;The setting of drainpipe water outlet, in this way can be with away from bottom 400mm or so eminence Ensure persistently there is water at the certain altitude of biological delaying basin bottom;Medium floods the life that can ensure anaerobe into water for a long time It is long, increase nitrification and denitrification effect, ability is denitrogenated in promotion.In addition, flooding layer 5 by setting, biological delaying basin can be made to exist Moisture is laid in drought period, ensures that plant can be avoided with continued propagation because withered or even dead caused by water shortage within drought period.
A kind of construction method being detained pool structure with the rainwater biology for flooding layer, this approach includes the following steps:
Impervious barrier 6 is arranged in S1, structure pond body, pond body side wall, from being sequentially disposed in drainage blanket 4, mistake from top to bottom in pond body Crossing layer 3, filter layer 2, retention layer 1 is highly respectively:100-200mm;200-300mm,400-600mm,200-300mm;
S2, it takes media stock to be numbered, sieving processing is carried out to several media stock using multilayer screen cloth, obtain each The size distribution curve of kind media stock;The multilayer screen cloth number of plies is no less than 6 layers, and from top to bottom, aperture is sequentially reduced;Wherein, most The sieve of large aperture is about 3400 microns, and the sieve of minimum-value aperture is about 50 microns;
S3, when obtaining the sieving processing of each media stock respectively according to aforementioned particle size distribution curve, 15% and 85% can be made The strainer dimension D that the medium of quality is detained15iAnd D85i, the number of i expression media stocks;
S4, according to table 1 the configurating filtered layer of particle diameter distribution 2 medium;
S5, according to the D of each media stock15iAnd D85iScreening can fill the media stock of transition zone 3 and drainage blanket 4, mistake It crosses the media stock selected by layer 3 and drainage blanket 4 and meets following screening conditions respectively:
D15(transition zone)≤5 × D85(filter layer);
D15(drainage blanket)≤5 × D85(transition zone)
Wherein:D15Indicate the size for the strainer for making the medium of 15% mass be detained;D85Expression keeps the medium of 85% mass stagnant The size of the strainer stayed;
S6, it selects at least one as corresponding drainage blanket 4 in the media stock for meeting drainage blanket 4, carries out drainage blanket 4 Filling;
S7, select at least one as corresponding transition zone 3 in the media stock for meeting transition zone 3, to carry out transition Layer 3 is filled;Slow release carbon source and complex microorganism preparations are added in 3 filler of transition zone or by complex microorganism preparations, slow Multilayer embedded particles prepared by the property released carbon source and chitosan.Multilayer embedded particles preparation method is by microorganism formulation and sustained release Property carbon source mixes, and multilayer embedded particles are made in outer layer covers chitosan;Aforementioned slow release carbon source is that the jade of particle is made Meter Xin, rice husk, sawdust or stalk;Complex microorganism preparations are using pottery luer microbial inoculum, bacillus subtilis microbial inoculum and/or false unit cell Microbial inoculum, when using three kinds of microbial inoculums, by 3:2:1 is uniformly mixed, slow release carbon source, the quality of microorganism formulation and chitosan Than being respectively 500:1:10, multilayer embedded particles dosage is in every cubic metre of 300~500g.
In S8, filter layer 2, from 0~100mm depth addition of the upper surface under for the fertilizer of plant growth;Per 100m2 Fertilizer of the 0~82kg for plant growth is added in the filler of surface area;In the fertilizer for plant growth containing as follows at Point:Animal organic manure 61%, calcium superphosphate 2.4%, magnesium sulfate 3.7%, potassium sulfate 2.4%, trace element 1.2%, nitrogen phosphorus Potash fertilizer 4.9%, quick lime 24.4%;Adsorption particle, preferably activated carbon and zeroth order iron mixture are added in 2 filler middle level of filter layer, Or zeolite and zeroth order iron mixture;The two mass ratio is 5:1, mixture quality is the 3%~5% of filter layer packing quality, Complete the structure of rainwater biology delaying basin.
Embodiment 1
By certain urban road, 5m is established2Small-sized biological delaying basin with rainfall runoff of the filtration, purification from both sides road, Heel row is purified to storm sewer.Wherein:Delaying basin overall height 1m, 1 height 200mm of retention layer, filtering layer height are 400mm, Transition layer height is 300mm, and draining layer height is 100mm, maximum infiltration rate no more than 360mm/hr, content of chemical substances and Particle diameter distribution property meets the requirements parameter;Wherein, increase 3kg organic fertilizer in 0~100mm fillers of filter layer, for planting Object growth survival;Filter layer adds activated carbon and zeroth order iron mixture 70kg;Transition zone addition complex microorganism embedded particles are filled out Expect 36kg.After facility operation stabilization, to 5 main pollutions of the front and back rainfall runoff of continuous natural precipitation event test purification Object carries out test analysis, and as in Figure 3-5, major pollutants removal efficiency is respectively TSS>99%, TN>75%, TP>70%, Data refer to table 2.
Table 2
Embodiment 2
300m is established in certain park2Macro-organism delaying basin, the rainwater diameter that purification periphery greenery patches, road, parking lot are collected Stream, while peripheral cell part cross flow runoff is mixed in intaking, it is discharged into river after purification.Wherein:Delaying basin overall height 1.35m, 1 height 250mm of retention layer, filtering layer height are 600mm, and transition layer height is 300mm, and draining layer height is 200mm, Maximum infiltration rate is no more than 500mm/hr, content of chemical substances and particle diameter distribution property meet it is contained in text require parameter, Wherein, uniformly increase 100kg organic fertilizer in 0~100mm fillers of filter layer;Filter layer adds zeolite and Zero-valent Iron mixing Object 1000kg;Transition zone adds complex microorganism embedded particles filler 100kg.After facility operation stabilization, to 12 rainfalls The front and back main pollutant of event system water inlet carries out test analysis, and as shown in figs 6-8, major pollutants removal efficiency is respectively TSS>99%, TN>70%, TP>70%, data refer to table 3.
Table 3
Embodiment 3
In certain large parking lot, 20m is established2The biological delaying basin of purification, for purifying the diameter for coming from parking lot and collecting Stream, is discharged into after purification in landscape pond.Wherein:Delaying basin overall height 1.2m, 1 height 300mm of retention layer, filtering layer height are 500mm, transition layer height are 300mm, and draining layer height is 100mm, and maximum infiltration rate is no more than 500mm/hr, chemical substance Content and particle diameter distribution property meet it is contained in text require parameter, wherein in 0~100mm fillers increase 12kg organic fertilizers Material;Filter layer adds activated carbon and zeroth order iron mixture 200kg;Transition zone adds complex microorganism embedded particles filler 100kg. After facility operation stabilization, 6 continuous front and back main pollutants of rainfall runoff of natural precipitation event test purification are carried out Test analysis, as shown in figs. 9-11, major pollutants removal efficiency are respectively TSS>99%, TN>75%, TP>70%, data are detailed It is shown in Table 4.
Table 4
Rainwater biology delaying basin of the present invention, increases the setting for flooding layer, on the one hand, anti-to increase nitration denitrification The effect of anaerobic environment should be provided, enhance system denitrogenation dephosphorizing;On the other hand, it is that the functional plants grown in system carry Water source has been supplied, has ensured demand of the drought period to water.Meanwhile there is inherent contacts between biological each layer filler of delaying basin, and There is specific size distribution profile for filler, is refined to the percentage of medium within the scope of different-grain diameter;Also specify Jie simultaneously The infiltration coefficient of the concrete content of chemical substance, the range of pH value and medium in matter ensure that system is long-term, stable operation. In addition, strengthen compound filler mixed active charcoal or zeolite, Zero-valent Iron, natural organic carbon source and complex microorganism preparations etc., Ensure that biological delaying basin can efficiently handle the polluter in rainwater, especially to removal solid suspension, denitrogenation dephosphorizing There is significant effect.
It is confirmed according to test result, biological delaying basin of the invention is bright to Introduced cases face source Runoff contaminants removal effect It is aobvious.
It is of the present invention effectively to reduce rainfall runoff peak value and volume with the rainwater biology delaying basin for flooding layer, Dispersion short-time storm collects flow, and improves the treatment effeciency to inputting runoff, and enhancing physics processing capacity (suction-operated) is changed Processing capacity (redox reaction) is learned, biological treatment capabilities (microbial biochemical reaction) improve denitrogenation dephosphorizing efficiency;Meanwhile Suspended matter, heavy metal, organic matter, pathogen, hydrocarbon and some micro quantity organic pollutants are effectively removed, runoff rain is purified Water realizes the reuse of water;Since the effect of plant increases bio-diversity, Landscape benefit is provided, and is improved local microcosmic Weather reduces tropical island effect.Since system can keep good performance for a long time, therefore maintenance cost can be reduced, and can be real Existing produced modularization in batches.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill Many modifications and changes will be apparent from for the those of ordinary skill in art field.

Claims (10)

1. a kind of being detained pool structure with the rainwater biology for flooding layer, which is characterized in that set successively from top to bottom in the delaying basin It is set to:Retention layer (1), filter layer (2), transition zone (3) and drainage blanket (4), foregoing transition layer (3) and drainage blanket (4), which are used as, to be flooded Realization is arranged by the water outlet height of collector pipe (10) in no layer (5), the height for flooding layer (5), and aforementioned collector pipe (10) is divided into Two parts, a part are located in drainage blanket (4), and another part is located at outside pond body;The end of collector pipe (10) is connected to rainwater Well (11) is collected, the rainwater saved is collected in rain collection well (11), reuse is extracted by water pump (13);The retention layer (1) For storing rainwater when catchment in short term, particular medium is filled in filter layer (2), transition zone (3) and drainage blanket (4), institute The medium of selection meets following screening conditions, D in following formula15Indicate the size for the strainer for making the medium of 15% mass be detained, D85Indicate the size for the strainer for making the medium of 85% mass be detained;
Media stock selected by filter layer (2) and transition zone (3) meets following screening conditions:
D15(transition zone)≤5 × D85(filter layer);
Media stock selected by transition zone (3) and drainage blanket (4) meets following screening conditions:
D15(drainage blanket)≤5 × D85(transition zone).
2. according to claim 1 be detained pool structure with the rainwater biology for flooding layer, which is characterized in that collector pipe (10) In, the pipeline being located in drainage blanket (4) uses perforated pipe, is located at the pipeline outside pond body and uses not perforated pipe.
3. according to claim 1 be detained pool structure with the rainwater biology for flooding layer, which is characterized in that described catchments Height and the upper surface for flooding layer (5) for managing (10) water outlet, that is, not perforated pipe end are mutually neat.
4. according to claim 1 be detained pool structure with the rainwater biology for flooding layer, which is characterized in that collector pipe (10) Straight pipe end be equipped with blow valve (14).
5. according to claim 1 be detained pool structure with the rainwater biology for flooding layer, which is characterized in that retention layer (1) The delaying basin side wall of top is equipped with the first overflow port (9), and first overflow port (9) passes through piping connection to municipal rain pipe Net;The second overflow port (12) is arranged in the side wall of rain collection well (11), and aforementioned second overflow port (12) passes through piping connection to city Political affairs Storm Sewer Network.
6. according to claim 5 be detained pool structure with the rainwater biology for flooding layer, which is characterized in that the second overflow port (12) lower surface is not higher than the upper surface for flooding layer (5).
7. according to claim 1 be detained pool structure with the rainwater biology for flooding layer, which is characterized in that filter layer (2), The medium filler of transition zone (3) and drainage blanket (4) is satisfied by following conditions:pH:5.5~7.5;Zong Danhanliang <1000mg/kg; Lin Suanyanhanliang <80mg/kg;You Jizhihanliang <5%;The particle diameter distribution of wherein filter layer (2) meets following table:
Screen mesh size (μm) It is detained the percentage of sieve Soil <50 <3% Fines 50-150 5-30% Fine grained 150-250 10-30% Medium fine grained 250-500 40-60% Coarse granule 500-1000 25% Pole coarse granule 1000-2000 0-10% Bulky grain 2000-3400 <3%
8. according to claim 1 be detained pool structure with the rainwater biology for flooding layer, which is characterized in that retention layer (1) Height is 200-300mm;Filter layer (2) is highly 400-600mm;Transition zone (3) is highly 200-300mm;Drainage blanket (4) is high Degree is 100-200mm;Wherein, filter layer (2) adds the fertilizer for plant growth from 0~100mm depths of the upper surface under; Per 100m2Fertilizer of the 0~82kg for plant growth is added in the filler of surface area;Contain in the fertilizer for plant growth Following ingredient:Animal organic manure 61%, calcium superphosphate 2.4%, magnesium sulfate 3.7%, potassium sulfate 2.4%, trace element 1.2%, nitrogen, phosphorus and potassium fertilizer 4.9%, quick lime 24.4%;Add adsorption particle, preferably activated carbon and zero in filter layer (2) filler middle level Valence iron mixture or zeolite and zeroth order iron mixture;The two mass ratio is 5:1, mixture quality is filter layer packing quality 3%~5%;Addition slow release carbon source and complex microorganism preparations or by complex microorganism preparations, slow in the transition zone (3) Multilayer embedded particles prepared by the property released carbon source and chitosan.
9. a kind of construction method described in claim 1 being detained pool structure with the rainwater biology for flooding layer, which is characterized in that This approach includes the following steps:
S1, structure pond body, pond body side wall are arranged impervious barrier (6), drainage blanket (4), transition are sequentially disposed in from top to bottom in pond body Layer (3), filter layer (2), retention layer (1) are highly respectively:100-200mm;200-300mm,400-600mm,200-300mm;
S2, it takes media stock to be numbered, sieving processing is carried out to several media stock using multilayer screen cloth, obtains various Jie The grading curve of matter raw material;
S3, when obtaining the sieving processing of each media stock respectively according to aforementioned particle size distribution curve, 15% and 85% mass can be made Medium be detained strainer dimension D15iAnd D85i, the number of i expression media stocks;
S4, according to table 1 the configurating filtered layer of particle diameter distribution (2) medium;
S5, according to the D of each media stock15iAnd D85iScreening can fill the media stock of transition zone (3) and drainage blanket (4), mistake It crosses the media stock selected by layer (3) and drainage blanket (4) and meets following screening conditions respectively:
D15(transition zone)≤5 × D85(filter layer);
D15(drainage blanket)≤5 × D85(transition zone)
Wherein:D15Indicate the size for the strainer for making the medium of 15% mass be detained;D85Expression makes the medium of 85% mass be detained The size of strainer;
S6, select at least one as corresponding drainage blanket (4) in the media stock for meeting drainage blanket (4), to be drained Layer (4) filling;Select at least one as corresponding transition zone (3) in the media stock for meeting transition zone (3), to carry out Cross layer (3) filling;Layer (2) filling is filtered using the medium of step S4 configurations, sequence from top to bottom is to complete rainwater life The structure of object delaying basin.
10. the construction method according to claim 9 with the rainwater biology delaying basin for flooding layer, which is characterized in that Organic fertilizer is added on filter layer (2) surface layer, and activated carbon and Zero-valent Iron or zeolite and Zero-valent Iron are added in middle level;In transition zone (3) Middle addition slow release carbon source and complex microorganism preparations are prepared by complex microorganism preparations, slow release carbon source and chitosan Multilayer embedded particles.
CN201810854105.1A 2018-07-30 2018-07-30 It is a kind of to be detained pool structure and construction method with the rainwater biology for flooding layer Pending CN108689499A (en)

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CN111362411A (en) * 2020-03-04 2020-07-03 江苏东恒环境控股有限公司 Biological retention tank for treating tail water of distributed sewage treatment facility
CN114906985A (en) * 2022-05-11 2022-08-16 云南农业大学 Efficient denitrification and effective blockage prevention biological retention system

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Publication number Priority date Publication date Assignee Title
CN111362411A (en) * 2020-03-04 2020-07-03 江苏东恒环境控股有限公司 Biological retention tank for treating tail water of distributed sewage treatment facility
CN114906985A (en) * 2022-05-11 2022-08-16 云南农业大学 Efficient denitrification and effective blockage prevention biological retention system

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