CN102251459B - System for carrying out collection, purification and utilization on rainwater on road surfaces - Google Patents
System for carrying out collection, purification and utilization on rainwater on road surfaces Download PDFInfo
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- CN102251459B CN102251459B CN2011101146219A CN201110114621A CN102251459B CN 102251459 B CN102251459 B CN 102251459B CN 2011101146219 A CN2011101146219 A CN 2011101146219A CN 201110114621 A CN201110114621 A CN 201110114621A CN 102251459 B CN102251459 B CN 102251459B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention provides a system for carrying out collection, purification and utilization on rainwater on road surfaces, and the system comprises a groove and one or more packing units arranged in the groove, wherein the two sides of each packing unit are respectively provided with a baffle, a ventilation well is formed between two baffles arranged at the head end and tail end of two adjacent packing units, and a ventilation well is formed among the baffles at the two ends of the groove and the inner side wall of the groove; the bottom surface of each packing unit is provided with a concrete grating, a water collecting sump is formed between the concrete grating and the internal bottom surface of the groove, and the water collecting sump is mutually communicated with all the ventilation wells; and the packing unit on the concrete grating is composed of a cobble layer, a gravel layer, a matrix layer and a planting soil layer which are sequentially arranged from bottom to top, and plants are planted in the planting soil layer. Rainwater which is purified by the system disclosed by the invention can satisfy the needs of agricultural water and general landscape water.
Description
Technical field
The invention belongs to rainwater accumulating purification utilization technical field, be specifically related to a kind of rainwater on road surface and harvest the purification utilization system.
Background technology
Water resource is very important special natural resource again, is mankind's base substance of depending on for existence and the restraining factors of human kind sustainable development.Along with world population expands, water shortage problem constitutes a threat to the whole world.China belongs to water resource poor developing country, the per capita water yield 2400 ~ 2500 m
3/ a is world occupancy volume per person's 1/4th.Simultaneously, China also faces serious water environment pollution problem, and water pollution mainly contains two large classes: i.e. point-source pollution (Point Source Pollution) and non-point pollution (Non-point Source Pollution).Non-point pollution mainly refers under the leaching and souring of rainfall runoff (comprising irrigation), pollutant in atmosphere, in ground and soil enters the water body such as rivers, lake and reservoir and ocean and the water that causes pollutes, this pollution also referred to as pollution of area source, is ubiquitous.Source by non-point pollution can be divided into it city non-point source and agricultural non-point source.Urban non-point source pollution increases the weight of with the raising of the urbanization level.EPA (USEPA) classifies city overland runoff as cause river, the whole America and lake pollution the third-largest pollution sources.
At present, city water resource shortage and water pollution problems need to be resolved hurrily, and rainwater is the primary measure of carrying out " increasing income and decreasing expenditure " as basic, the most direct, the most most economical water resource.Simultaneously, both domestic and external facts have proved, ecological technique is one of fundamental way that solves non-point pollution.The ecological technique that non-point pollution is administered is mainly the measure of pollutant of controlling by approach such as the material balance of controlling the ecosystem and flow of matter, takes full advantage of the detergent power of soil, vegetation and water body, holds back the materials such as nitrogen, phosphorus, silt.It is lower that ecological technique has expense, in many ways is benefited, and is fit to the advantages such as multiple condition, is a kind of non-point source pollution control approach of practicability and effectiveness.
This shows, need to utilize a kind of novel rainwater accumulating purification utilization device of ecological technique research and development to collect, process and give reuse to urban rainfall runoff, to realize exploitation freshwater resources and the dual purpose of controlling urban non-point source pollution.Artificial swamp is the rainwater accumulating purification utilization ecological technique that develops early, and it is to utilize physics in natural ecosystems, chemistry and biological triple synergies to realize the former water purification effect of import.It is low investment, low energy consumption, the effective water treatment system that price is the cheapest in the world at present, is a kind of method that is adapted to very much green city's construction, ecological environmental protection, purifying domestic sewage, rainwater-collecting purification.
The artificial swamp treating apparatus mainly contains horizontal flow artificial wetland and processes bed and vertical current constructed wetland processing bed, the horizontal drowned flow artificial wet land height of bed is 0.6 ~ 0.8m approximately, adopt thicker matrix such as gravel as treatment media, former water is bottom horizontal flow sheet under the earth's surface of artificial swamp, and kind is implanted with large-scale emergent aquactic plant such as reed, cattail and the Scirpus tabernaemontani etc. that secrete the oxygen ability in hypothallus, utilizes the oxygen ability of secreting of water plant to provide oxygen for the organic substance that the biomembrane on artificial Wetland Substrate decomposes in former water.More than vertical current constructed wetland height of bed 1.0m, usually adopt thinner matrix such as sand as filtration media, former water is being processed in the downward vertical infiltration process in top layer, and the plant great majority that it adopts are reed, cyperus alternifolius and vetiver etc.
The weak point that exists has: (1) horizontal flow artificial wetland is processed bed and is had the shortcomings such as aerobic condition deficiency, though it can remove SS well, and can remove some BOD.But he is usually bad to the removal effect of ammonia nitrogen.Because it can not complete the nitrifying process of most of waste water, even it has stronger denitrification ability, thereby two processing procedures of nitrification and denitrification that can not complete independently waste water, the purpose of processing to reach denitrogenation of waste water.(2) vertical current constructed wetland processing bed is stronger to disposal ability and the nitrification ability of oxygen consumption organic in waste water, and it has better aerobic condition than horizontal flow artificial wetland, and to BOD in waste water
5All better with the removal effect of COD, but poor than horizontal flow artificial wetland to the removal effect of SS, and blockage phenomenon very easily; Although it is very strong to the nitrification ability of waste water, its denitrification ability is also poor than horizontal flow artificial wetland, thereby can not complete separately two processing procedures of nitrification and denitrification of waste water, the purpose of processing to reach denitrogenation of waste water.(3) vertical current constructed wetland is processed bed and horizontal flow artificial wetland and is processed beds two kinds artificial swamps to the removal ability of phosphorus in former water all relatively poor (＜30 ~ 40%), and the matrix such as sand of existing extensive employing, gravel is shorter saturated application life to the absorption of phosphorus, general 2 ~ 3 years: even with horizontal flow artificial wetland and the vertical current constructed wetland composition hybrid system that is together in series, as still adopting sand, gravel matrix, its to the clearance of phosphorus still less than 60%.(4) present artificial swamp is processed bed and generally is the circular or square of sealing, and floor space is larger, need to have the larger area ward that the construction that can complete artificial swamp is provided, and construction condition is restricted, and can not be widely used.(5) at present the artificial swamp plant of adopting is most is annual shrub or herbaceous plant, and summer, treatment effect was no doubt desirable, but to winter plant withered after, the treatment effect of impact not only, and affect attractive in appearance.
Summary of the invention
The purpose of this invention is to provide a kind of rainwater on road surface and harvest the purification utilization system, be based on vertical current constructed wetland and the urban road rainwater accumulating purification processing facility reconstructed, but the water after processing is through collecting direct reuse in Municipal and landscape water.
The technical solution adopted in the present invention is, a kind of rainwater on road surface harvests the purification utilization system, comprise groove and be arranged on the interior one or more filler units of groove, the both sides of each filler unit are respectively arranged with baffle plate, form the ventilation well between two baffle plates of adjacent two filler unit two ends, form the well of ventilating between the baffle plate at groove two ends and groove inside wall; Each filler unit bottom surface is provided with a concrete grate, forms catch basin between concrete grate and groove inner bottom surface, and catch basin and all ventilation well communicate with each other; Filler unit on the concrete grate is comprised of the cobble layer that sets gradually from the bottom up, layer of gravel, hypothallus and plantation soil layer, plants on the plantation soil layer and is implanted with plant.
Wherein, catch basin is inclined to set.
Wherein, the low side of catch basin is provided with the outlet pipe that communicates with the external world.
Be further characterized in that, the thickness of cobble layer is 0.05-0.2m, and the thickness of layer of gravel is 0.1-0.3m, and the thickness of hypothallus is 0.1-0.3m, and the plantation the thickness of the layer is 0.2-0.5m; The gross thickness of filler unit is 0.45-1.3m.
Wherein, hypothallus is Flyash Layer, blast furnace slag blanket, zeolite layer or mixture layer; Described mixture layer is any two or three mixture with the arbitrary proportion composition in flyash, blast furnace slag, zeolite.
Its feature further is, each filler unit lining is equipped with many air ducts, and the bottom of air duct is positioned at the upper surface of cobble layer, and the top of air duct is higher than the upper surface of plantation soil layer; The air duct length that is positioned at filler unit is H, be provided with a plurality of apertures from plantation soil layer upper surface to the air duct the downward 1/8H of plantation soil layer upper surface, be provided with a plurality of apertures from cobble layer upper surface to the air duct that cobble layer upper surface makes progress 2/5H.
Wherein, the upper end of baffle plate is higher than plantation soil layer upper surface.
The invention has the beneficial effects as follows,
1. take vertical current constructed wetland as the basis, former current are through all packing layers, and good than the horizontal drowned flow artificial wet land treatment effect, treatment effeciency is high, and capacity of resisting impact load is strong.Adopt the matrix fills such as cobble, gravel, flyash (or blast furnace slag or zeolite or their matched combined), planting soil in packing layer, to the stronger disposal ability that has of the pollutants such as organic matter, nitrogen (N), phosphorus (P), heavy metal in former water.Clearance to COD (COD) is 50% ~ 70%, is 40% ~ 60% to the clearance of total nitrogen (TN), to ammonia nitrogen (NH
3-N) clearance is 50% left and right, clearance to solubility orthophosphates (DP) is 70% ~ 90%, clearance to total phosphorus (TP) is 70% ~ 90%, clearance to heavy metal lead (Pb) is 30% ~ 40%, clearance to heavy metal chromium (Cr) is 20% ~ 30%, is 30% ~ 40% to the clearance of heavy metal cadmium (Cd).Native system and afforestation of city simultaneously combined closely, and enlarges its range of application, so that rainwater is fully effectively utilized.Through after system purification of the present invention, total nitrogen in water outlet (TN), total phosphorus (TP), ammonia nitrogen (NH
3-N), the main water quality index such as COD (COD), suspension (SS), heavy metal (being mainly lead, chromium, cadmium) is for the rainfall runoff early-stage rainwater, water outlet can reach " urban sewage reutilization city miscellaneous water water quality " (GB/T18920-2002) and " urban sewage reutilization landscape water water quality " related request (GB/T18921-2002) substantially.For rainfall runoff middle and later periods rainwater, water outlet can reach " water environment quality standard " (GB 3838-2002) V class water water quality substantially, to satisfy agricultural water and general landscape water demand.
2. improve air reaeration intensity by ventilation well and air duct are set, avoided the vertical current constructed wetland bottom to cause the phenomenon of water quality deterioration, fouling due to anaerobism, guaranteed effluent quality.
Description of drawings
Fig. 1 is that rainwater on road surface of the present invention harvests the top view that a filler unit is set in the groove of purification utilization system;
Fig. 2 is that rainwater on road surface of the present invention harvests the longitudinal sectional drawing that a filler unit is set in the groove of purification utilization system;
Fig. 3 is that rainwater on road surface of the present invention harvests the longitudinal sectional drawing that a plurality of filler units are set in the groove of purification utilization system;
Fig. 4 is that rainwater on road surface of the present invention harvests the purification utilization system and is arranged on schematic diagram in the middle of road;
Fig. 5 is that rainwater on road surface of the present invention harvests the schematic diagram that the purification utilization system is arranged on the road both sides;
Fig. 6 is that air duct is embedded in the structural representation in filler unit.
In figure, 1. groove, 2. baffle plate, 3. ventilation well, 4. concrete grate, 5. catch basin, 6. cobble layer, 7. layer of gravel, 8. hypothallus 9. kind is planted soil layer, 10. outlet pipe, 11. air ducts, 12. metal screens, 13. rainwater on road surfaces harvest purification utilization system, 14. roads.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
As depicted in figs. 1 and 2, the invention provides a kind of rainwater on road surface and harvest the purification utilization system, comprise groove 1 and be arranged on a filler unit in groove 1, the both sides of filler unit are respectively arranged with baffle plate 2, form the well 3 of ventilating between baffle plate 2 and groove 1 inside wall; The filler unit bottom surface is provided with concrete grate 4, forms catch basin 5 between concrete grate 4 and groove 1 inner bottom surface, catch basin 5 and two ventilation wells 3 formation " U " the shape gallery of ventilating that communicates with each other; Catch basin 5 is inclined to set, and its gradient is 0.01 ~ 0.015(11), and the low side of catch basin 5 is provided with the outlet pipe 10 that communicates with the external world.
Rainwater accumulating purification utilization of the present invention system can be arranged in centre or the both sides of road 14, according to Len req in groove 1 a plurality of filler units are set, as shown in Figure 3, the both sides of each filler unit are respectively arranged with baffle plate 2, form ventilation well 3 between two baffle plates 2 of adjacent two filler unit two ends, also form the well 3 of ventilating between the baffle plate 2 at groove 1 two ends and groove 1 inside wall; Each filler unit bottom surface is provided with a concrete grate 4, form catch basin 5 between concrete grate 4 and groove 1 inner bottom surface, catch basin 5 communicates with each other with all ventilation wells 3, catch basin 5 is inclined to set, its gradient is 0.01 ~ 0.015(11), and the low side of catch basin 5 is provided with the outlet pipe 10 that communicates with the external world.
Filler unit on concrete grate 4 is that 0.2-0.5m kind is planted soil layer 9 and formed by the thickness that sets gradually from the bottom up is the cobble layer 6 of 0.05-0.2m, layer of gravel 7 that thickness is 0.1-0.3m, thickness is 0.1-0.3m hypothallus 8 and thickness; The particle diameter of cobble is 50-100mm, and the particle diameter of gravel is 10-30mm, and the particle diameter of planting soil is 2-5mm; Hypothallus 8 is the Flyash Layer of particle diameter 1-3mm, the blast furnace slag blanket of particle diameter 5-10mm, the zeolite layer of particle diameter 3-5mm or the mixture layer of particle diameter 3-8mm, and mixture layer is the mixture that flyash, blast furnace slag, zeolite any two or three form with arbitrary proportion.Separate with geotextiles between every layer, in order to avoid fine particle stops up lower floor's filtrate or enters bottom catch basin 5 with processing water migration downwards, affect effluent quality or ventilatory effect.Each filler unit lining is equipped with many air ducts 11.Baffle plate 2 upper ends prevent that higher than plantation soil layer 9 former infiltrate under water from causing overflow slowly and making the unprocessed bottom ventilation catch basin 5 that flows directly into of former water.Metal screen 12 is stamped in ventilation well 3 upper ends, in order to avoid the road surface deposit falls into.Plantation soil layer 9 is used for serike, be urban road green plants commonly used, as Ligustrum quihoui, Chinese littleleaf box, the tuber of dwarf lilyturf grass and grass-leaved sweetflag, the root system of plant not only can play the effect of secreting oxygen, can also be for microbial growth provide environment, thus native system improved to the removal effect of the pollutants such as N, P, heavy metal.Hypothallus 8 is used for the pollutants such as Adsorption N, P, heavy metal, and layer of gravel 7 is used for Phosphate Sorption, and cobble layer 6 mainly plays the support effect, also can adsorb a small amount of P.
Rainwater accumulating purification utilization of the present invention system can be arranged in centre or the both sides of road 14, when building take the city or the residential quarter pavement of road be benchmark, the upper surface of filler unit needs lower than road surface 5 ~ 10cm, and when preventing that amount of precipitation is excessive, rainwater has little time down to ooze and overflows; And ventilation well 3 tops need are higher than road surface 5 ~ 20cm, to prevent that the rainwater on road surface runoff from entering bottom catch basin 5 and affecting groove 1 effluent quality along ventilation well 3, simultaneously add a cover metal screen 12 at ventilation well 3 tops, for attractive in appearance and safe consideration, can prevent that on the other hand the road surface deposit from entering by ventilation well 3 obstruction that the bottom catch basin causes catch basin on the one hand.
Rainwater is through the road surface lateral gradient, as shown in Figure 4, when rainwater on road surface of the present invention harvested purification utilization system 13 and is arranged in city or residential quarter road 14 middle, rainwater imported rainwater on road surface of the present invention in the mode of bilateral (being pavement runoff imports in it from the both sides of system of the present invention) and harvests purification utilization system 13; As shown in Figure 5, when rainwater on road surface of the present invention harvested purification utilization system 13 and is arranged in the both sides of city or residential quarter road 14, rainwater imported rainwater on road surface of the present invention in the mode of monolateral (be pavement runoff from the one-sided remittance of system of the present invention its in) and harvests purification utilization system 13; Rainwater imports catch basin 5 by concrete grate 4 again through the filtration of filler unit, because catch basin 5 is provided with certain gradient, the catch basin 5 of postponing of the rainwater after filtration is discharged to the water storage place by outlet pipe 10, final reuse, the rainwater of reuse can be used for afforestation of city.The main purpose that ventilation well 3 is set is to be convenient to catch basin 5 ventilate, and the aqueous metamorphism after preventing from processing is smelly.As shown in Figure 6, be furnished with many air ducts 11 in each filler unit, caliber 50mm, the bottom of air duct 11 is positioned at the upper surface of cobble layer 6, and the top of air duct 11 exceeds plantation soil layer 9 upper surfaces, enters to prevent former water.air duct 11 length that are embedded in filler unit are H, be provided with a plurality of apertures from plantation soil layer 9 upper surfaces to the air duct 11 the plantation soil layer 9 downward 1/8H of upper surface, be provided with a plurality of apertures from cobble layer 6 upper surface to the air duct 11 that cobble layer 6 upper surface make progress 2/5H, the aperture of aperture is 5mm, pitch of holes is 2.5cm, purpose is to provide ventilation condition for the top of filler unit and bottom, make filler unit reach the aerobic-oxygen-anaerobism of the holding concurrently-oxygen-aerobic oxygen regularity of distribution of holding concurrently, the processing water water quality deterioration that alleviation causes due to anaerobism, the phenomenon that fouls, guarantee effluent quality.
The present invention mainly passes through to change the oxygen distribution of internal system and the collection mode of the rear water of processing on the basis of vertical current constructed wetland, with the assurance effluent quality; The present invention is arranged on filler unit in groove 1, and the shape of groove 1 is long and narrow, can be applicable in the middle of urban road 14 in production practices and both sides, compares its range of application of artificial swamp and is enlarged.In addition, improve the air reaeration intensity by ventilation well 3 and air duct 11 is set, avoided the vertical current constructed wetland bottom to cause the phenomenon of water quality deterioration, fouling due to anaerobism, guaranteed effluent quality.Adopt evergreen all the year round urban road green plants commonly used as the serike of system of the present invention, for microorganism provides suitable growing environment, and then the whole detergent power that improves pollutant in rainfall runoff of accessory system, simultaneously during winter approached, in the situation that it is attractive in appearance not affect the city, guarantee system's effluent quality, so also with urban non-point source pollution control and rainwater harvest purification utilization and afforestation of city is combined closely, has development prospect preferably, suitable promoting the use of.
Below by test, the effect that rainwater on road surface of the present invention harvests the purification utilization system is described further:
Test minutes five groups: former water is through water distribution bucket and water distributor, enters rainwater on road surface of the present invention in the mode of bilateral water inlet and harvests the purification utilization system, and the overall height 1050mm of system of the present invention is respectively from bottom to top: absolute altitude 0 ~ 100mm is catch basin 5; Absolute altitude 100 ~ 200mm is cobble layer 6, and particle diameter is 50 ~ 100mm; Absolute altitude 200 ~ 450mm is layer of gravel 7, and particle diameter is 10 ~ 30mm; Absolute altitude 450 ~ 650mm is that hypothallus 8(1 group is flyash, and particle diameter is 1 ~ 3mm; 2 groups is blast furnace slag, and particle diameter is 5 ~ 10mm; 3 groups is zeolite, and particle diameter is 3 ~ 5mm; 4 groups be blast furnace slag with zeolite by volume for 1:1 mixes, particle diameter is 3 ~ 8mm; 5 groups is that flyash, blast furnace slag, zeolite are the 1:1:1 mixing by volume, and particle diameter is 3 ~ 8mm); Absolute altitude 650 ~ 950mm is plantation soil layer 9, and particle diameter is 2 ~ 5mm; Absolute altitude 950 ~ 1050mm is superelevation (preventing that former water is excessive).
Test one: former water carries out water distribution according to rainfall runoff early-stage rainwater data, and COD (COD) is 453.66mg/L, ammonia nitrogen (NH
3-N) be 2.97mg/L, total nitrogen (TN) is 16.12mg/L, solubility orthophosphates (DP) is 1.15mg/L, total phosphorus (TP) is 5.19mg/L, heavy metal lead (Pb) is 0.36mg/L, and heavy metal chromium (Cr) is 0.32mg/L, and heavy metal cadmium (Cd) is 0.018mg/L.Operation hydraulic load 2.0m
3/ m
2D.By the processing of system of the present invention, water outlet reaches " urban sewage reutilization city miscellaneous water water quality " (GB/T18920-2002) and " urban sewage reutilization landscape water water quality " related request (GB/T18921-2002) substantially.Five groups of tests are as shown in table 1 to the clearance (test one) of each pollutant index:
Test two: former water carries out water distribution according to rainfall runoff middle and later periods rainwater data, and COD (COD) is 138.65mg/L, ammonia nitrogen (NH
3-N) be 1.45mg/L, total nitrogen (TN) is 5.76mg/L, solubility orthophosphates (DP) is 0.32mg/L, total phosphorus (TP) is 1.38mg/L, heavy metal lead (Pb) is 0.15mg/L, and heavy metal chromium (Cr) is 0.12mg/L, and heavy metal cadmium (Cd) is 0.015mg/L.Experimental rig used is with test one.Operation hydraulic load 2.0m
3/ m
2D.By the processing of system of the present invention, water outlet reaches " water environment quality standard " (GB 3838-2002) V class water water quality substantially, can satisfy agricultural water and general landscape water demand.Five groups of tests are as shown in table 2 to the clearance (test two) of each pollutant index:
Relatively can find out from the removal effect of above-mentioned two groups of tests, system of the present invention is more stable for the removal effect of Rainfall Runoff.For rainfall runoff different phase (initial stage and middle and later periods) rainwater, the experimental rig that is filled with flyash substrate is best for the removal effect of solubility orthophosphates (DP), and clearance can reach 85% left and right, and the clearance of total phosphorus (TP) is reached 80% left and right; The experimental rig that is filled with blast furnace slag matrix or zeolite matrix all can reach 80% left and right for the clearance of solubility orthophosphates (DP) and total phosphorus (TP), for COD and NH
3The removal effect of-N is better, can reach respectively 55% or 75% left and right and 45% or 70% left and right; Above five groups of devices can reach respectively 35%, 25%, 35% left and right for the removal effect of heavy metal Pb, Cr, Cd.Be filled with blast furnace slag and zeolite 1:1 mixed fillers and flyash, blast furnace slag, zeolite and by the experimental rig of 1:1:1 mixed fillers, the removal effect of each contamination index be better than single filler basically, and filling flyash, blast furnace slag, zeolite to press the treatment effect of experimental rig of 1:1:1 mixed fillers ideal.This shows, different matrix (filler) has selectively for various removal of pollutants, and the collocation mixing by filler simultaneously can improve clean-up effect more significantly.
Claims (7)
1. a rainwater on road surface harvests the purification utilization system, it is characterized in that: comprise groove (1) and be arranged in groove (1)
One or more filler units, the both sides of each filler unit are respectively arranged with baffle plate (2); If groove is provided with a plurality of filler units in (1), form ventilation well (3) between two baffle plates (2) of adjacent two filler unit two ends, form the well (3) of ventilating between the baffle plate (2) that is positioned at groove (1) two ends and groove (1) inside wall; If be provided with a filler unit in groove (1), form ventilation well (3) between baffle plate (2) and groove (1) inside wall; Each filler unit bottom surface is provided with a concrete grate (4), forms catch basin (5) between concrete grate (4) and groove (1) inner bottom surface, and catch basin (5) communicates with each other with all ventilation well (3); Filler unit on concrete grate (4) is comprised of the cobble layer (6) that sets gradually from the bottom up, layer of gravel (7), hypothallus (8) and plantation soil layer (9), and upper kind of plantation soil layer (9) is implanted with plant.
2. described rainwater on road surface harvests the purification utilization system according to claim 1, and it is characterized in that: described catch basin (5) is inclined to set.
3. described rainwater on road surface harvests the purification utilization system according to claim 2, and it is characterized in that: the low side of described catch basin (5) is provided with the outlet pipe (10) that communicates with the external world.
4. described rainwater on road surface harvests the purification utilization system according to claim 1, it is characterized in that: the thickness of described cobble layer (6) is 0.05-0.2m, the thickness of layer of gravel (7) is 0.1-0.3m, the thickness of hypothallus (8) is 0.1-0.3m, and the thickness of plantation soil layer (9) is 0.2-0.5m; The gross thickness of filler unit is 0.45-1.3m.
5. according to claim 1 or 4 described rainwater on road surfaces harvest the purification utilization system, it is characterized in that: described hypothallus (8) is Flyash Layer, blast furnace slag blanket, zeolite layer or mixture layer; Described mixture layer is any two or three mixture with the arbitrary proportion composition in flyash, blast furnace slag, zeolite.
6. described rainwater on road surface harvests the purification utilization system according to claim 1, it is characterized in that: described each filler unit lining is equipped with many air ducts (11), the bottom of air duct (11) is positioned at the upper surface of cobble layer (6), and the top of air duct (11) is higher than the upper surface of plantation soil layer (9); Air duct (11) length that is positioned at filler unit is H, be provided with a plurality of apertures from plantation soil layer (9) upper surface to the air duct (11) the downward 1/8H of plantation soil layer (9) upper surface, be provided with a plurality of apertures from cobble layer (6) upper surface to the air duct (11) that cobble layer (6) upper surface makes progress 2/5H.
7. described rainwater on road surface harvests the purification utilization system according to claim 1, it is characterized in that: the upper end of described baffle plate (2) is higher than plantation soil layer (9) upper surface.
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| CN102502970A (en) * | 2011-11-30 | 2012-06-20 | 中国科学院地理科学与资源研究所 | Stepped subsurface-flow constructed wetland domestic sewage treatment device |
| JP5866659B2 (en) * | 2011-12-12 | 2016-02-17 | 株式会社ナガオカ | Osmotic water intake equipment |
| CN103371069B (en) * | 2012-04-26 | 2015-08-12 | 交通运输部科学研究院 | A kind of concatenation type pavement runoff collects the ecologic planting groove with purification utilization |
| CN102877503A (en) * | 2012-09-26 | 2013-01-16 | 天津好为节能环保科技发展有限公司 | Circulating installation for recycling surface water |
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| JP4278337B2 (en) * | 2002-03-25 | 2009-06-10 | クリオン株式会社 | Soil purification apparatus and method, and denitrifying exhaust sheet |
| CN201809249U (en) * | 2010-06-25 | 2011-04-27 | 中国水利水电科学研究院 | Artificial filler underground infiltration domestic sewage treatment system |
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