CN107759015A - Sponge city multistage Rain Garden strengthens the method and structure that runoff pollution removes - Google Patents

Sponge city multistage Rain Garden strengthens the method and structure that runoff pollution removes Download PDF

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Publication number
CN107759015A
CN107759015A CN201711053691.1A CN201711053691A CN107759015A CN 107759015 A CN107759015 A CN 107759015A CN 201711053691 A CN201711053691 A CN 201711053691A CN 107759015 A CN107759015 A CN 107759015A
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China
Prior art keywords
level
rain garden
garden
layer
level rain
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CN201711053691.1A
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Inventor
唐宁远
李显涛
汪良珠
阮键华
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Hunan Dachen Environmental Protection Technology Co Ltd
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Hunan Dachen Environmental Protection Technology Co Ltd
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Priority to CN201711053691.1A priority Critical patent/CN107759015A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001Runoff or storm water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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
    • C02F3/302Nitrification and denitrification treatment
    • 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

Abstract

A kind of sponge city multistage Rain Garden strengthens the method and structure that runoff pollution removes, and carries out multistep treatment to the pollutant in rainwater using multistage Rain Garden, is specially:Rainwater flows into two level Rain Garden after water leg flows into one-level Rain Garden, and the ammonia and nitrogen organic in rainwater carries out hypoxic/anaerobic processing and is changed into N again after the advanced row Aerobic Process for Treatment of one-level Rain Garden is changed into nitrate nitrogen2Discharge, untreated complete ammonia and nitrogen organic enter two level Rain Garden, carry out hypoxic/anaerobic processing again after the advanced row Aerobic Process for Treatment of two level Rain Garden is changed into nitrate nitrogen and are changed into N2Discharge;Insecticide in rainwater enters two level Rain Garden progress Aerobic Process for Treatment after small-molecule substance is changed into after one-level Rain Garden carries out hypoxic/anaerobic processing and is transformed into free of contamination material.Multistep treatment is carried out to pollutant using multistage Rain Garden, Rain Gardens at different levels are set as to upper strata is oxygen-enriched, the environment of lower floor's hypoxic/anaerobic, it is multiple to pollutant to carry out aerobic plus hypoxic/anaerobic processing, effectively to be removed to pollutant.

Description

Sponge city multistage Rain Garden strengthens the method and structure that runoff pollution removes
Technical field
The present invention relates to the method and structure that a kind of runoff pollution removes, especially a kind of sponge city multistage Rain Garden Strengthen method and structure that runoff pollution removes, belong to sponge urban construction technical field.
Background technology
During rainy season set, urban waterlogging can all occur in many cities in the whole nation, bring inconvenience to civil plantation, even The loss of lives and properties can be caused;Rainfall simulator erosion impervious surface makes to carry substantial amounts of pollutant for example particle in rainfall runoff Thing, nitrogen, phosphorus, heavy metal, agrochemical are directly discharged into urban water-body, destroy Urban Water Environment.In view of the above-mentioned problems, country carries Go out this brand-new urban construction theory of sponge city.Sponge city requirement city have to rainwater ooze, be stagnant, store, be net, use, row Function.
Rain Garden is the scrobicula greenery patches of self-assembling formation or hand digging, and sponge urban construction technical manual is recommended Rainfall runoff control technology, come from rainwater sand filtration and infiltration ditch technology, incorporate the functions of two kinds of technologies, rainwater flows through delay During facility, through permeating, precipitating, crown_interception, runoff water is cut in, pollutant is preferably gone in runoff Remove, part rainfall runoff gradually penetrates into soil, recharging groundwater.Using Rain Garden, the water that can recover nature again follows Loop system, improve Urban Water Environment, can also improve city water resource allotment.Set relative to the high conventional municipal draining of construction cost Apply, rainfall runoff is handled using Rain Garden, be more economical rational scheme, and can also beautifying city, purification air.
At present, the design of most domestic Rain Garden mainly considers that its landscape effect and the water rate control to rainfall runoff are imitated Fruit, and catharsis is weakened, the problem of effluent nitrate-nitrogen concentration height, total nitrogen is difficult to reduce be present.To PAHs in rainfall runoff, The processing of " three cause " pollutant of agrochemical difficult degradation, also lacks and is effectively directed to measure.The deficiency for more than, it is desirable to provide It is a kind of effectively to remove Conventional pollution for example nitrogen, phosphorus etc. and the hazardous contaminant of a small amount of difficult degradation for example agrochemical rain Spray garden.
By being retrieved to domestic patent, discovery has Patents, is exemplified below:
Application number CN201610322138.2, the hair of entitled " the existing residential quarter multistage Rain Garden osmosis system of the continuous formula of string " Bright patent application discloses a kind of existing residential quarter multistage Rain Garden osmosis system of continuous formula of string, and it includes:Multiple roof flowers Garden, multiple waterspouts, multiple first order Rain Gardens, the low gesture of polylith are formed a team central greenery patches, multiple second level Rain Gardens, and first The elevation of level Rain Garden is higher than the elevation of second level Rain Garden, and the elevation of described second level Rain Garden is higher than the third level The elevation of Rain Garden.Advantages of the present invention:By osmosis plants such as multistage Rain Garden, Low elevation greenbelt, Glassed swales by rain Water infiltrates underground on the spot, so as to supplement groundwater resources;Rain infiltration underground, reduces surface runoff, so as to alleviate flood The problem of damage caused by waterlogging does harm to, soil serves purification function during rain infiltration;Low elevation greenbelt, Glassed swale, Rain Garden are to rain Water runoff is all purified.These purification functions can reduce the pollution problem of surface drainage.
Although above-mentioned application and a kind of multistage Rain Garden, it is for integrally carry out that rainwater stores only for residential quarter System, floor space is larger, is vulnerable to the limitation of field of employment.
Application number CN201710419404.8, the patent of invention Shen of entitled " a kind of runoff treatment system and method " A kind of runoff treatment system and method please be disclose, the system includes:Collection device, for the earth's surface footpath of confluxing Stream;Primary filter, for carrying out primary filter to the rainwash;At least one second grade soil filter, is used for The rainwash after primary filter is collected using pipeline, secondary filtration is carried out to the rainwash;And by after secondary filtration The rainwash is discharged into river course;In this way, the processing system can be arranged over long distances along riverbank side, rainwash is carried out Multistage is depolluted after processing, removes and water body is discharged into river after the suspension carried in rainwash, COD, nitrogen, the pollutant such as phosphorus In, both will not polluted river, the load of sewage disposal system will not be increased again, also do not interfere with the draining of urban pipe network;And can To plant urban landscape plant at least one second grade soil filter, beautify the environment.
Although above-mentioned patent application is handled rainwash using multistage means, treatment effect is still not enough managed Think, it is necessary to improve.
The content of the invention
The present invention lacks effectively asking for measure for processing of the current Rain Garden to pollutant in rainfall runoff Topic proposes a kind of sponge city multistage Rain Garden and strengthens method and structure that runoff pollution removes, conventional dirty effectively to remove Contaminate thing for example nitrogen, phosphorus, heavy metal and the hazardous contaminant of a small amount of difficult degradation for example agrochemical.
The present invention is that technological means is used by solving the above problems:A kind of sponge city multistage Rain Garden strengthens footpath The method that stream pollution removes, multistep treatment is carried out to the pollutant in rainwater using multistage Rain Garden, is specially:Rainwater is through collection Tank flows into two level Rain Garden after flowing into one-level Rain Garden, and the organic nitrogen, ammonia nitrogen in rainwater are advanced in one-level Rain Garden Row Aerobic Process for Treatment be changed into after nitrate nitrogen carry out again hypoxic/anaerobic processing be changed into N2Or N2O is discharged, untreated complete organic nitrogen, Ammonia nitrogen enters two level Rain Garden, carries out anoxic/detest again after the advanced row Aerobic Process for Treatment of two level Rain Garden is changed into nitrate nitrogen Oxygen processing is changed into N2Or N2O is discharged;Insecticide in rainwater is changed into after one-level Rain Garden carries out hypoxic/anaerobic processing Enter two level Rain Garden progress Aerobic Process for Treatment after small-molecule substance and be transformed into free of contamination material.
Specifically, rainwater flows into the gravel layer of one-level Rain Garden lower floor from the planting soil layer on one-level Rain Garden upper strata, Enter the one-level drainpipe of one-level Rain Garden through gravel layer, the delivery port through one-level drainpipe flows into two level Rain Garden, warp The planting soil layer on two level Rain Garden upper strata flows into the gravel layer of two level Rain Garden lower floor, is spent in gravel layer into two level rainwater The Municipal secondary effluent pipe in garden;The planting soil layer of organic nitrogen, ammonia nitrogen on one-level Rain Garden upper strata in rainwater changes through Aerobic Process for Treatment It is changed into N to enter the gravel layer progress hypoxic/anaerobic denitrification of one-level Rain Garden lower floor after nitrate nitrogen2Or N2O is discharged, not The ammonia and nitrogen organic handled enters two level Rain Garden, and the planting soil layer on two level Rain Garden upper strata changes through Aerobic Process for Treatment It is changed into N to enter the gravel layer progress hypoxic/anaerobic denitrification of two level Rain Garden lower floor after nitrate nitrogen2Or N2O is discharged;Rain Insecticide in water is handled in the gravel layer of one-level Rain Garden lower floor through hypoxic/anaerobic is changed into small-molecule substance, Ran Hou The planting soil layer aerobic oxidation on two level Rain Garden upper strata is free of contamination material.
Further, the rainwater through processing flows into three-level Rain Garden from the delivery port of Municipal secondary effluent pipe, still untreated complete Planting soil layer on three-level Rain Garden upper strata of ammonia nitrogen, organic nitrogen and organic substance through Aerobic Process for Treatment to be changed into nitrate nitrogen laggard The gravel layer progress hypoxic/anaerobic denitrification for entering three-level Rain Garden lower floor is changed into N2Or N2O is discharged;Untreated complete desinsection Agent is handled in the gravel layer of two level Rain Garden lower floor through hypoxic/anaerobic is changed into small-molecule substance, is then spent in three-level rainwater The planting soil layer aerobic oxidation on garden upper strata is free of contamination material.
A kind of sponge city multistage Rain Garden strengthens the structure that runoff pollution removes, including one-level Rain Garden and two level Rain Garden, one-level drainpipe is provided with one-level Rain Garden, the water intake end of one-level drainpipe is located at the bottom of one-level Rain Garden Portion, Municipal secondary effluent pipe is provided with two level Rain Garden, the water intake end of Municipal secondary effluent pipe is located at the bottom of two level Rain Garden;One-level The water inlet of Rain Garden connects with water leg, and the delivery port of one-level drainpipe connects with the water inlet of two level Rain Garden, and The water outlet height of one-level drainpipe is higher than the water inlet of two level Rain Garden.
Further, one-level Rain Garden sets gradually coating, planting soil layer, layer of sand and gravel layer from top to down, and one The water intake end of level drainpipe is located at the gravel layer bottom of one-level Rain Garden, i.e., positioned at the gravel layer bottom of one-level Rain Garden One-level drainpipe on be provided with drainage through hole as water intake end;Two level Rain Garden sets gradually coating, kind from top to down Soil layer, permeable geotextiles and gravel layer, the water intake end of Municipal secondary effluent pipe is planted to be located at the gravel layer segment of two level Rain Garden, that is, exist Drainage through hole is provided with the Municipal secondary effluent pipe of the gravel layer bottom of two level Rain Garden as water intake end.
Further, the waterproof cloth for being used for separating the two is provided between one-level Rain Garden and two level Rain Garden.
Further, the structure also includes three-level Rain Garden, and the top of wherein three-level Rain Garden is divided into oxygen-enriched portion Divide, bottom is divided into hypoxic/anaerobic part;The delivery port of Municipal secondary effluent pipe connects with the water inlet of three-level Rain Garden, and two level The delivery port of drainpipe is higher than the water inlet of three-level Rain Garden;Three-level Rain Garden sets gradually coating, kind from top to down Soil layer, layer of sand and gravel layer are planted, is provided with three-level drainpipe in three-level Rain Garden, the water intake end of three-level drainpipe is located at three-level rain The bottom of spray garden gravel layer, i.e., it is provided with drainage on the three-level drainpipe positioned at the gravel layer bottom of three-level Rain Garden and leads to Hole is as water intake end.
Further, the waterproof cloth for being used for separating the two is provided between two level Rain Garden and three-level Rain Garden.
Further, overburden cover 50mm-100mm, filler is bark or decomposed fibrous material, packing material size are 40-60mm。
Further, planting soil layer filler is rough sand, table soil, litter compost or decomposed wood chip, thickness 200-400mm.
Further, the mass content of each composition of planting soil layer filler is 40-60% rough sand, 30-40% tables are native, 10-20% falls Leaf compost or decomposed wood chip.
Further, layer of sand filler is middle sand, particle diameter 0.3-1.5mm, thickness 60-120mm.
Further, gravel layer is 1 by volume ratio:1 gravel and wood chip or a scrap of paper mixing composition, thickness are not less than 300mm。
Further, gravel layer wood chip or a scrap of paper particle diameter are 10-20mm;Gravel layer from top to bottom for it is thin, in, coarse gravel Layer, the particle size range of each layer gravel is respectively 5-10mm, 10-30mm, 30-60mm, and thickness is followed successively by 50-150mm, 50-200mm And 100-300mm.
Further, water inlet is provided with scree, and the particle size range of rubble used in scree is 30-60mm.
Further, the aperture of drainage through hole is 5-15mm, and is enclosed with the outside of the drainpipe at drainage through hole place Permeable geotextiles.
Further, the drain pipe diameter at drainage through hole place is 100-150mm.
Further, interconnected overflow pipe is additionally provided with multistage Rain Garden, the water intake end of overflow pipe is located at ground Top, delivery port are communicated at municipal storm sewer or rainwater-collecting.
Further, the water intake end top cover cover rim of overflow pipe is provided with grizzly bar.
Further, diameter of overflow pipe 100-150mm, water intake end are higher than coating 150-200mm.
The beneficial effects of the invention are as follows:
1. the present invention carries out multistep treatment using multistage Rain Garden to the pollutant in runoff, Rain Gardens at different levels are set as Upper strata is oxygen-enriched, the environment of lower floor's hypoxic/anaerobic, multiple to pollutant to carry out aerobic plus hypoxic/anaerobic processing, with to pollutant Effectively removed.
2. the water inlet of drainpipe of the present invention is divided into the gravel layer bottom of Rain Garden hypoxic/anaerobics at different levels, make rainwater Drainpipe is entered back into after the aerobic and abundant processing of hypoxic/anaerobic is all carried out in every one-level Rain Garden, with from upper level rain Spray garden flows into the removal processing that next stage Rain Garden continues pollutant.
Brief description of the drawings
Fig. 1 is the floor map of the embodiment of the present invention one.
Fig. 2 is the schematic cross-sectional view of the embodiment of the present invention one.
Fig. 3 is the floor map of the embodiment of the present invention two.
Fig. 4 is the schematic cross-sectional view of the embodiment of the present invention two.
In figure:11. one-level Rain Garden, 12. two level Rain Gardens, 13. three-level Rain Gardens, 21. coatings, 22. kinds Plant soil layer, 23. layers of sand, 24. gravel layers, 3. water legs, 4. screes, 5. drainpipes, 51. one-level drainpipes, 52. Municipal secondary effluents Pipe, 53. three-level drainpipes, 54. drainage through holes, 6. overflow pipes.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Embodiment one
As shown in figure 1, a kind of sponge city multistage Rain Garden strengthens the structure that runoff pollution removes, including one-level Rain Garden 11 and two level Rain Garden 12, the top of wherein one-level Rain Garden 11 is divided into oxygen-rich fraction, bottom is divided into hypoxic/anaerobic portion Point, two level Rain Garden 12 is mainly oxygen-rich fraction;This one-level Rain Garden 11 is located at the center of whole multistage Rain Garden, and two Level Rain Garden 12 is surrounded on the periphery of one-level Rain Garden 11, and the relative altitude of one-level Rain Garden 11 is spent higher than two level rainwater The height in garden 12, one-level drainpipe 51 is provided with one-level Rain Garden 11, the water intake end of one-level drainpipe 51 is located at one-level rainwater The bottom in garden 11, Municipal secondary effluent pipe 52 is provided with two level Rain Garden 12, the water intake end of Municipal secondary effluent pipe 52 is located at two level rain The bottom in spray garden 12;The water inlet of one-level Rain Garden 11 connects with water leg 3, the delivery port and two level of one-level drainpipe 51 The water inlet connection of Rain Garden 12, and the water outlet height of one-level drainpipe 52 is higher than the water inlet of two level Rain Garden 12. The water intake end of drainpipes 5 at different levels is arranged on to the bottom of Rain Gardens at different levels, makes rainfall runoff in gardens at different levels by processing After enter back into drainpipe 5 and flow out, to carry out the maximum processing that depollutes to rainfall runoff;The delivery port of one-level drainpipe 51 and two The water inlet connection of level Rain Garden 12, and the water outlet height of one-level drainpipe 51 is higher than the water inlet of two level Rain Garden 12 Mouthful, condition is provided for the multistep treatment of rainfall runoff, rainfall runoff is carried out the processing that depollutes in the Rain Garden of upper level After enter back into next stage Rain Garden and continue the processing that depollutes.
One-level Rain Garden 11 sets gradually coating 21, planting soil layer 22, layer of sand 23 and gravel layer 24 from top to down, and one The water intake end of level drainpipe 51 is located at the bottom of gravel layer 24 of one-level Rain Garden 11, i.e., in the gravel positioned at one-level Rain Garden 11 Drainage through hole 54 is provided with the one-level drainpipe 51 of the bottom of rock layers 24 and is used as water intake end, and the delivery port of one-level drainpipe 51 is high Degree is higher than layer of sand 23, gravel layer 24 is formed waterflooding area with guaranteed water level and remains a hypoxic/anaerobic environment;Two level rain Spray garden 12 sets gradually coating 21, planting soil layer 22, permeable geotextiles 23 and gravel layer 24, Municipal secondary effluent pipe from top to down 52 water intake end is located at the part of gravel layer 24 of two level Rain Garden 12, i.e., positioned at the bottom of gravel layer 24 of two level Rain Garden 12 Drainage through hole 54 is provided with the Municipal secondary effluent pipe 52 in portion and is used as water intake end.Rain Gardens at different levels are according to coating from top to down 21st, the setting of planting soil layer 22, layer of sand 23 and gravel layer 24, the both growth for vegetation provide a suitable living environment, Be advantageous to the existence of microorganism, to remove the pollutant in rainfall runoff.
The waterproof cloth for being used for separating the two is provided between one-level Rain Garden 11 and two level Rain Garden 12.Avoid one-level Any circulation of material between Rain Garden 11 and two level Rain Garden 12, form an orderly multistage environment.
The thickness of coating 21 is 50mm-100mm, and filler is bark or decomposed fibrous material, packing material size 40- 60mm.Coating 21 using bark or decomposed fibrous material as filler can both keep the humidity of soil, avoid topsoil It is hardened and cause permeance property to reduce, and a microbial environment has been built in Soil Interface, have and utilize rainwater on road surface runoff The degraded of the organic matters such as middle grease, while additionally aid the erosion for reducing rainfall runoff to upper soll layer.
The filler of planting soil layer 22 is rough sand, table soil, litter compost or decomposed wood chip, thickness 200-400mm.Planting soil layer 22 provide habitat for plant, are plant absorption, filling adsorption, chemical precipitation and microbial degradation organic matter, heavy metal, nitrogen, phosphorus Place is provided with other pollutants, while also there is preferable filtration, can remove the particulate matter in rainfall runoff and suction Be attached to other polluters on particulate matter, the thickness of planting soil layer 22 determines according to the vegetation planted, shallow rooted plant selection compared with Shallow planting soil layer 22, deep rooting plant should then select thicker planting soil layer 22.
The mass content of each composition of the filler of planting soil layer 22 is 40-60% rough sand, 30-40% tables soil, 10-20% litter composts Or decomposed wood chip.Wherein rough sand can improve the permeance property of planting soil layer, and the organic material such as litter compost or decomposed wood chip can change Kind planting soil Pore structure in soil, moisture holding capacity, promote enrichment of microorganism etc. to act on.
The filler of layer of sand 23 is middle sand, particle diameter 0.3-1.5mm, thickness 60-120mm.Layer of sand 23 is transition zone, prevents from planting Plant native small particles thing and be directly entered gravel layer 24, block the hole of gravel layer 24.
Gravel layer 24 is 1 by volume ratio:1 gravel and wood chip or a scrap of paper mixing composition, the gravel of one-level Rain Garden 11 The thickness of rock layers 24 is 500mm, and the thickness of gravel layer 24 of two level Rain Garden 12 is 300mm.The filler of gravel layer 24 uses organic matter The wood chip or a scrap of paper of matter, it is used as electron donor in denitrification, promotes the denitrification of nitrate nitrogen to remove.
The wood chip of gravel layer 24 or a scrap of paper particle diameter are 10-20mm;Gravel layer 24 from top to bottom for it is thin, in, cobble rock layers, respectively The particle size range of layer gravel is respectively 5-10mm, 10-30mm, 30-60mm.24 each particle diameter of gravel layer of one-level Rain Garden 11 Gravel thickness is followed successively by 150mm, 200mm and 250mm, and the gravel thickness of 24 each particle diameter of gravel layer of two level Rain Garden 12 is successively For 100mm, 100mm and 150mm.
Water inlet is provided with scree 4, and the particle size range of rubble used in scree 4 is 30-60mm.Water inlet it is broken Clitter 4 is used to consuming, the energy of dispersing water flow, prevents rainfall runoff to sewage garden coating 21 and the top layer of planting soil layer 22 Wash away, while preliminary filtering function is played to the large particulate matter in rainfall runoff.
The aperture of drainage through hole 54 is 5-15mm, and where drainage through hole 54 at drainpipe 5 outside be enclosed with it is permeable Geotextiles.
The caliber of drainpipe 5 at where drainage through hole 54 is 100-150mm.
Interconnected overflow pipe 6 is additionally provided with multistage Rain Garden, the water intake end side of resting on the ground of overflow pipe 6, is gone out The mouth of a river is communicated at municipal storm sewer or rainwater-collecting.In the present embodiment, one-level Rain Garden 11 and two level Rain Garden 12 Overflow pipe 6 be connected directly to Municipal secondary effluent pipe 52, Municipal secondary effluent pipe 52 is communicated to municipal storm sewer or rainwater-collecting again Place.
The water intake end top cover cover rim of overflow pipe 6 is provided with grizzly bar.
The caliber 100-150mm of overflow pipe 6, water intake end are higher than coating 150-200mm.
Water-in and water-out water treatment and treatment effect in the present embodiment is as shown in the table:
Water quality index Water inlet Water outlet Clearance(%)
SS(mg/L) 267±33 11±8 95.9±3.0
COD(mg/L) 205±43 15±9 92.7±4.4
NH4 +-N(mg/L) 6.8±2.7 0.3±0.4 95.6±5.9
TN(mg/L) 9.4±3.5 0.6±0.8 93.6±8.5
TP(mg/L) 1.7±0.5 0.1±0.1 94.1±5.9
O, O- dimethyl-S-(N- methylcarbamoyl methyl)Phosphorodithioate(Rogor)(µg/L) 719±67 28±47 96.1±6.5
Daconil M(Bravo)(µg/L) 558±84 15±32 97.3±5.7
Total zinc (μ g/L)) 638±104 23±47 96.4±7.4
Total nickel (μ g/L) 258±65 14±23 94.6±8.9
Total lead (μ g/L) 385±84 17±28 95.6±7.3
Embodiment two
The difference of the present embodiment and above-described embodiment is:This multistage Rain Garden also includes three-level Rain Garden 13, fits Conjunction is arranged on riverbank or knob etc., the wherein upper part of one-level Rain Garden 11 and two level Rain Garden 12 according to physical features It is that oxygen-rich fraction, lower part are hypoxic/anaerobic part, three-level Rain Garden 13 is mainly oxygen-rich fraction;One-level rainwater is spent Garden 11, two level Rain Garden 12 are disposed adjacent successively from high to low with three-level Rain Garden 13, the delivery port of Municipal secondary effluent pipe 52 Connected with the water inlet of three-level Rain Garden 13, and the delivery port of Municipal secondary effluent pipe 52 is higher than the water inlet of three-level Rain Garden 13 Mouthful, while the water outlet height of Municipal secondary effluent pipe 52 is higher than the layer of sand 23 of two level Rain Garden 12, highly makes gravel with guaranteed water level Rock layers 24 form waterflooding area and remain a hypoxic/anaerobic environment;Three-level Rain Garden 13 sets gradually coating from top to down 21st, planting soil layer 22, layer of sand 23 and gravel layer 24, three-level drainpipe 53, three-level drainpipe 53 are provided with three-level Rain Garden 13 Water intake end be located at the bottom of the gravel layer 24 of three-level Rain Garden 13, i.e., positioned at the bottom of gravel layer 24 of three-level Rain Garden 13 Three-level drainpipe 53 on be provided with drainage through hole 54 and be used as water intake end.
The waterproof cloth for being used for separating the two is provided between two level Rain Garden 12 and three-level Rain Garden 13.Avoid two level Any circulation of material between Rain Garden 12 and three-level Rain Garden 13, form an orderly multistage environment.
In the present embodiment, the overflow pipe 6 of one-level Rain Garden 11 and the overflow pipe 6 of two level Rain Garden 12 are interconnected, Flowed directly into after finally importing the drainpipe 5 of three-level Rain Garden 13 at municipal storm sewer or rainwater-collecting.
Above-described embodiment further relates to a kind of sponge city multistage Rain Garden and strengthens the method that runoff pollution removes, using more Level Rain Garden carries out multistep treatment to the pollutant in rainwater, is specially:Rainwater flows into one-level Rain Garden 11 through water leg 3 Flow into two level Rain Garden 12 afterwards, the organic nitrogen, ammonia nitrogen in rainwater are changed into the advanced row Aerobic Process for Treatment of one-level Rain Garden 11 Hypoxic/anaerobic processing is carried out after nitrate nitrogen again and is changed into N2Discharge, untreated complete organic nitrogen, ammonia nitrogen enter two level Rain Garden 12, carry out hypoxic/anaerobic processing again after the advanced row Aerobic Process for Treatment of two level Rain Garden 12 is changed into nitrate nitrogen and be changed into N2Row Go out;Insecticide in rainwater enters two after small-molecule substance is changed into after one-level Rain Garden 11 carries out hypoxic/anaerobic processing Level Rain Garden 12 carries out Aerobic Process for Treatment and is transformed into free of contamination material.In the removal process of pollutant, with rainfall runoff The process infiltrated, most organic nitrogens or ammonia nitrogen are attracted in the top layer filler of Rain Garden in i.e. planting soil layer 22 and carried out Time-consuming longer Ammonia Nitrification reaction, and the nitrate nitrogen in rainfall runoff(From two aspects, first, the rainwater of this rainfall Runoff;Second, absorption is being converted into nitrate nitrogen without rain period in the ammonia nitrogen or organic nitrogen of filler by nitrobacteria, this nitrate nitrogen stream Dynamic property is very strong, also not filled to be adsorbed, and infiltrating runoff with this rinses)Go to carry out in hypoxic/anaerobic time-consuming shorter Denitrification reduces.
Specifically, rainwater flows into the gravel of the lower floor of one-level Rain Garden 11 from the planting soil layer 22 on the upper strata of one-level Rain Garden 11 Rock layers 24, the one-level drainpipe 51 of one-level Rain Garden 11 is entered through gravel layer 24, the delivery port through one-level drainpipe 51 flows into Two level Rain Garden 12, the planting soil layer 22 through the upper strata of two level Rain Garden 12 flow into the gravel layer of the lower floor of two level Rain Garden 12 24, enter the Municipal secondary effluent pipe 52 of two level Rain Garden 12 in gravel layer 24;Ammonia and nitrogen organic in rainwater is spent in one-level rainwater The planting soil layer 22 on the upper strata of garden 11 enters the gravel layer 25 of the lower floor of one-level Rain Garden 11 after Aerobic Process for Treatment is changed into nitrate nitrogen Carry out hypoxic/anaerobic denitrification and be changed into N2Discharge, untreated complete ammonia and nitrogen organic enters two level Rain Garden 12, in two level The planting soil layer 22 on the upper strata of Rain Garden 12 enters the gravel of the lower floor of two level Rain Garden 12 after Aerobic Process for Treatment is changed into nitrate nitrogen Rock layers 24 carry out hypoxic/anaerobic denitrification and are changed into N2Discharge;The gravel of insecticide in rainwater in the lower floor of one-level Rain Garden 11 Rock layers 24 are handled through hypoxic/anaerobic is changed into small-molecule substance, and then the planting soil layer 22 on the upper strata of two level Rain Garden 12 is good Oxygen is oxidized to free of contamination material.The phosphorus of particulate form, heavy metal then mainly pass through the mistake of filler in multistage Rain Garden in rainwater Filter is removed, and the phosphorus of solubilised state, heavy metal then pass through the sedimentation with the chemical group in multistage rainwater garden filling or heavy Shallow lake reaction is preferably removed.
Rainwater through processing flows into three-level Rain Garden 13, still untreated complete ammonia nitrogen from the delivery port of Municipal secondary effluent pipe 52 Planting soil layer 22 of the organic matter on the upper strata of three-level Rain Garden 13 enters three-level rainwater after Aerobic Process for Treatment is changed into nitrate nitrogen and spent The gravel layer 24 of the lower floor of garden 13 carries out hypoxic/anaerobic denitrification and is changed into N2Discharge;Untreated complete insecticide is in two level rainwater The gravel layer 24 of the lower floor of garden 12 is handled through hypoxic/anaerobic is changed into small-molecule substance, then on the upper strata of three-level Rain Garden 13 The aerobic oxidation of planting soil layer 22 be free of contamination material.
Using multistage Rain Garden, multi task process is carried out to the pollutant in rainfall runoff, it is thorough to be carried out to pollutant Remove.
As can be seen here, the invention has the advantages that:
1. the present invention carries out multistep treatment using multistage Rain Garden to the pollutant in runoff, Rain Gardens at different levels are set as Upper strata is oxygen-enriched, the environment of lower floor's hypoxic/anaerobic, multiple to pollutant to carry out aerobic plus hypoxic/anaerobic processing, with to pollutant Effectively removed.
2. the water inlet of drainpipe of the present invention is divided into the gravel layer bottom of Rain Garden hypoxic/anaerobics at different levels, make rainwater Drainpipe is entered back into after the aerobic and abundant processing of hypoxic/anaerobic is all carried out in every one-level Rain Garden, with from upper level rain Spray garden flows into the removal processing that next stage Rain Garden continues pollutant.
Above example is used for illustrative purposes only, rather than limitation of the present invention, the technology people about technical field Member without departing from the spirit and scope of the present invention, can also make a variety of changes or convert, therefore all equivalent Technical scheme should also belong to protection scope of the present invention, and protection scope of the present invention should be limited by each claim.As also Can be according to the pollution condition and region situation of runoff, outer in three-level Rain Garden sets level Four Rain Garden or Pyatyi again Rain Garden is even more more.

Claims (10)

1. a kind of sponge city multistage Rain Garden strengthens the method that runoff pollution removes, it is characterised in that:Utilize multistage rainwater Garden carries out multistep treatment to the pollutant in rainwater, is specially:Rainwater is through water leg(3)Flow into one-level Rain Garden(11)Afterwards Flow into two level Rain Garden(12), the ammonia and nitrogen organic in rainwater is in one-level Rain Garden(11)Advanced row Aerobic Process for Treatment is changed into Hypoxic/anaerobic processing is carried out after nitrate nitrogen again and is changed into N2Discharge, untreated complete ammonia and nitrogen organic enter two level Rain Garden (12), in two level Rain Garden(12)Advanced row Aerobic Process for Treatment be changed into after nitrate nitrogen carry out again hypoxic/anaerobic processing be changed into N2Discharge;Insecticide in rainwater is in one-level Rain Garden(11)After being changed into small-molecule substance after progress hypoxic/anaerobic processing Into two level Rain Garden(12)Carry out Aerobic Process for Treatment and be transformed into free of contamination material.
2. sponge city multistage Rain Garden as claimed in claim 1 strengthens the method that runoff pollution removes, it is characterised in that: Rainwater is from one-level Rain Garden(11)The planting soil layer on upper strata(22)Flow into one-level Rain Garden(11)The gravel layer of lower floor(24), Through gravel layer(24)Into one-level Rain Garden(11)One-level drainpipe(51), through one-level drainpipe(51)Delivery port flow into Two level Rain Garden(12), through two level Rain Garden(12)The planting soil layer on upper strata(22)Flow into two level Rain Garden(12)Lower floor Gravel layer(24), in gravel layer(24)Into two level Rain Garden(12)Municipal secondary effluent pipe(52);Ammonia nitrogen in rainwater has Machine thing is in one-level Rain Garden(11)The planting soil layer on upper strata(22)Enter one-level rainwater after Aerobic Process for Treatment is changed into nitrate nitrogen Garden(11)The gravel layer of lower floor(24)Carry out hypoxic/anaerobic denitrification and be changed into N2Discharge, untreated complete ammonia and nitrogen organic Into two level Rain Garden(12), in two level Rain Garden(12)The planting soil layer on upper strata(22)It is changed into nitre state through Aerobic Process for Treatment Enter two level Rain Garden after nitrogen(12)The gravel layer of lower floor(24)Carry out hypoxic/anaerobic denitrification and be changed into N2Discharge;Rainwater In insecticide in one-level Rain Garden(11)The gravel layer of lower floor(24)Handled through hypoxic/anaerobic and be changed into small-molecule substance, Then in two level Rain Garden(12)The planting soil layer on upper strata(22)Aerobic oxidation is free of contamination material.
3. sponge city multistage Rain Garden as claimed in claim 2 or claim 3 strengthens the method that runoff pollution removes, its feature exists In:Rainwater through processing is from Municipal secondary effluent pipe(52)Delivery port flow into three-level Rain Garden(13), still untreated complete ammonia nitrogen Organic matter is in three-level Rain Garden(13)The planting soil layer on upper strata(22)Enter three-level rain after Aerobic Process for Treatment is changed into nitrate nitrogen Spray garden(13)The gravel layer of lower floor(24)Carry out hypoxic/anaerobic denitrification and be changed into N2Discharge;Untreated complete insecticide exists Two level Rain Garden(12)The gravel layer of lower floor(24)Handled through hypoxic/anaerobic and be changed into small-molecule substance, then in three-level rain Spray garden(13)The planting soil layer on upper strata(22)Aerobic oxidation is free of contamination material.
4. a kind of sponge city multistage Rain Garden strengthens the structure that runoff pollution removes, it is characterised in that:Including one-level rainwater Garden(11)With two level Rain Garden(12), one-level Rain Garden(11)In be provided with one-level drainpipe(51), one-level drainpipe (51)Water intake end be located at one-level Rain Garden(11)Bottom, two level Rain Garden(12)In be provided with Municipal secondary effluent pipe(52), Municipal secondary effluent pipe(52)Water intake end be located at two level Rain Garden(12)Bottom;One-level Rain Garden(11)Water inlet and collection Tank(3)Connection, one-level drainpipe(51)Delivery port and two level Rain Garden(12)Water inlet connection, and one-level drainpipe (51)Water outlet height be higher than two level Rain Garden(12)Water inlet.
5. sponge city multistage Rain Garden as claimed in claim 4 strengthens the structure that runoff pollution removes, it is characterised in that: The one-level Rain Garden(11)Coating is set gradually from top to down(21), planting soil layer(22), layer of sand(23)And gravel layer (24), one-level drainpipe(51)Water intake end be located at one-level Rain Garden(11)Gravel layer(24)Bottom, i.e., positioned at one-level Rain Garden(11)Gravel layer(24)The one-level drainpipe of bottom(51)On be provided with drainage through hole(54)As water intake end;Two Level Rain Garden(12)Coating is set gradually from top to down(21), planting soil layer(22), layer of sand(23)And gravel layer(24), two Level drainpipe(52)Water intake end be located at two level Rain Garden(12)Gravel layer(24)Part, i.e., positioned at two level Rain Garden (12)Gravel layer(24)The Municipal secondary effluent pipe of bottom(52)On be provided with drainage through hole(54)As water intake end.
6. sponge city multistage Rain Garden as claimed in claim 4 strengthens the structure that runoff pollution removes, it is characterised in that: The structure also includes three-level Rain Garden(13), Municipal secondary effluent pipe(52)Delivery port and three-level Rain Garden(13)Water inlet Mouth connection, and Municipal secondary effluent pipe(52)Delivery port be higher than three-level Rain Garden(13)Water inlet;Three-level Rain Garden(13) Coating is set gradually from top to down(21), planting soil layer(22), layer of sand(23)And gravel layer(24), three-level Rain Garden(13) In be provided with three-level drainpipe(53), three-level drainpipe(53)Water intake end be located at three-level Rain Garden(13)Gravel layer(24)Bottom Portion, i.e., positioned at three-level Rain Garden(13)Gravel layer(24)The three-level drainpipe of bottom(53)On be provided with drainage through hole (54)As water intake end.
7. the sponge city multistage Rain Garden as described in claim 5 or 6 strengthens the structure that runoff pollution removes, its feature exists In:The coating(21)Thickness is 50mm-100mm, and filler is bark or decomposed fibrous material, packing material size 40- 60mm;
The planting soil layer(22)Filler is rough sand, table soil, litter compost or decomposed wood chip, thickness 200-400mm;
The planting soil layer(22)The mass content of each composition of filler is 40-60% rough sand, 30-40% tables soil, 10-20% fallen leaves heaps Fertile or decomposed wood chip;
The layer of sand(23)Filler is middle sand, particle diameter 0.3-1.5mm, thickness 60-120mm;
The gravel layer(24)It is 1 by volume ratio:1 gravel and wood chip or a scrap of paper mixing composition, thickness are not less than 300mm;
The gravel layer(24)Wood chip or a scrap of paper particle diameter are 10-20mm;Gravel layer(24)From top to bottom for it is thin, in, coarse gravel Layer, the particle size range of each layer gravel is respectively 5-10mm, 10-30mm, 30-60mm, and thickness is followed successively by 50-150mm, 50-200mm And 100-300mm.
8. the sponge city multistage Rain Garden as described in claim 5 or 6 strengthens the structure that runoff pollution removes, its feature exists In:The water inlet is provided with scree(4), scree(4)The particle size range of rubble used is 30-60mm.
9. the sponge city multistage Rain Garden as described in claim 5 or 6 strengthens the structure that runoff pollution removes, its feature exists In:The drainage through hole(54)Aperture be 5-15mm, and drainage through hole(54)Drainpipe at place(5)Outside be enclosed with Permeable geotextiles;The drainage through hole(54)Drainpipe at place(5)Caliber is 100-150mm.
10. sponge city multistage Rain Garden as claimed in claim 4 strengthens the structure that runoff pollution removes, its feature exists In:Interconnected overflow pipe is additionally provided with the multistage Rain Garden(6), overflow pipe(6)The water intake end side of resting on the ground, Delivery port is communicated at municipal storm sewer or rainwater-collecting;
The overflow pipe(6)Water intake end top cover cover rim be provided with grizzly bar;
The overflow pipe(6)Caliber 100-150mm, water intake end are higher than coating 150-200mm.
CN201711053691.1A 2017-11-01 2017-11-01 Sponge city multistage Rain Garden strengthens the method and structure that runoff pollution removes Pending CN107759015A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110012770A (en) * 2019-04-28 2019-07-16 徐州工程学院 A kind of efficient Rain Garden for cutting down runoff velocity and pollutant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110012770A (en) * 2019-04-28 2019-07-16 徐州工程学院 A kind of efficient Rain Garden for cutting down runoff velocity and pollutant
CN110012770B (en) * 2019-04-28 2021-04-30 徐州工程学院 Rainwater garden capable of efficiently reducing runoff flow velocity and pollutants

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