CN106836373A - One kind building vertical greening rainwater-collecting and reclamation set - Google Patents

One kind building vertical greening rainwater-collecting and reclamation set Download PDF

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Publication number
CN106836373A
CN106836373A CN201710229646.0A CN201710229646A CN106836373A CN 106836373 A CN106836373 A CN 106836373A CN 201710229646 A CN201710229646 A CN 201710229646A CN 106836373 A CN106836373 A CN 106836373A
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China
Prior art keywords
rainwater
water
standpipe
collecting
water tank
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CN201710229646.0A
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CN106836373B (en
Inventor
柴宏祥
邵知宇
沈月
康威
何强
古励
周健
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Chongqing University
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Chongqing University
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/02Methods or installations for obtaining or collecting drinking water or tap water from rain-water
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04DROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/04Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/08Down pipes; Special clamping means therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04DROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/04Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/08Down pipes; Special clamping means therefor
    • E04D2013/0806Details of lower end of down pipes, e.g. connection to water disposal system
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108Rainwater harvesting

Abstract

The invention discloses one kind building vertical greening rainwater-collecting and reclamation set, it includes rain water inlet standpipe, rainwater purification ecology cell body, personal water tank and rainwater-collecting standpipe, near the personal water tank and rainwater purification ecology cell body Side by side groupings of wall, rainwater water inlet standpipe and rainwater-collecting standpipe are respectively provided at rainwater purification ecology cell body two ends, rainwater purification ecology cell body is divided into some sections, is arranged alternately with anoxic denitrification section by aerobic nitrification section;Rainwater purification ecology cell body end section is chemical dephosphorization filler module;Recycle-water perforation sparge pipe in personal water tank bottom correspondence aerobic nitrification section is provided with embedded packing layer, check valve is equipped with the supervisor of recycle-water perforation sparge pipe.The solution have the advantages that:Both there is water-holding capacity, rainwater peak value is reduced, but while the pollutants such as SS, the COD for reducing, control nitrogen, phosphorus concentration are up to standard, also achieve automatic water supplement and environmental greening of the water tank to device.

Description

One kind building vertical greening rainwater-collecting and reclamation set
Technical field
The invention belongs to a kind of environmental greening facility, and in particular to one kind building vertical greening rainwater-collecting is filled with reuse Put.
Background technology
Since the 80's of 20th century, as afforestation developing steps start to accelerate, the afforestation coverage rate of China It is increasing, and afforest correlation technique and also constantly updating.With the process of urbanization, " garden city ", " garden-like cities ", " ecocity " etc. becomes the target of domestic city construction, has promoted the development of urban afforestation.Beijing, Shanghai City, Shenzhen The line city of China such as city one plays leading effect of taking the lead in the vertical greening of China, and China various regions city is all carried out in succession Research and practical work that vertical greening is built.With the continuous intensification that people are recognized urban ecological environment, urban afforestation Importance is increasingly displayed, and vertical greening be increasingly becoming China improve afforestation coverage in the city, strengthen urban ecology build If one of important means.At present, the vertical greening work of China is in the stage of fast development.Vertical greening has had Certain level, but it is the comparing distinct issues for existing that region develop unbalanced, new application pattern not yet to be developed etc..
In recent years, because China's urban waterlogging disaster takes place frequently, how science, efficiently solve urban waterlogging as government with The focus of professional's concern.According to statistics, China in 2012 to have 144 cities above county level to be subject to different degrees of interior Damage caused by waterlogging is done harm to, and very big loss and negative effect is caused to city.In addition to urban waterlogging, rainwater runoff pollution is dirty China's municipal water Another key subjects that must be faced in dye governance process.
Existing vertical greening technological means is:1st, standard stereo greening, using prefabricated greening module, forms monomer-type green The green wall of wall, block type and the green wall of composite type.2nd, it is general by the way of ground is planted using the wall greening for climbing Teng plant, by attached The wall greening that the modes such as wall type, traction wall-attachment are formed, more suitable for low-rise building, high level is can apply to using attached frame formula Building.3rd, metope cultivation box, planting groove, the wall greening constituted using the form of metope flower bucket, wall poppyhead groove, the wall base flower pond. The vertical greening mode of three of the above form, can only play the masking to building, noise reduction, lay the dust, reduce light pollution, improve ring Border miniclimate, to the building effect such as surface protection.But these three forms are required for using complex piped water supply, to day The utilizing status of right rainfall are little." a kind of building wall vertical greening rain disclosed in the A of Chinese patent literature CN 105821523 Water conservancy structure ", although the technology can reduce the pressure that rainwater discharge is caused to urban pipe network, can save collection rain water on roof Used as the resource of water supply of vertical greening system, but the problem for existing is:(1)By the water outlet of vertical greening rainwater utilization structure not Can reach《Urban sewage reutilization-urban reclaimed water water quality》(GB/T14190-2002)Urban afforestation standard and《Building With cell rainwater utilization project technical specification》(GB50400-2006)Specified in process after rainwater CODcr, SS index.(2)Need The water after filter and immersible pump for wanting larger collecting-tank to collect planting groove supply the use water of each planting groove plant, do not make full use of day The elevation advantage of right rainwater, is also consumed by the energy.(3)The building of lower level is appropriate only for, if being used in skyscraper, is necessarily deposited It is more in water tank and immersible pump, management service inconvenience, the problems such as noise is big when energy consumption is big, soundproof effect is bad.
The content of the invention
For technical problem present in prior art, the technical problems to be solved by the invention are just to provide a kind of building Vertical greening rainwater-collecting and reclamation set, it both has water-holding capacity, cuts down rainwater peak value, and energy purifying rainwater, is reducing The pollutant such as SS, CODcr while, control nitrogen, phosphorus concentration are up to standard, moreover it is possible to realize automatic water supplement and environment of the water tank to device Greening.
The technical problems to be solved by the invention realize that it includes that rain water inlet is vertical by such technical scheme Pipe, rainwater-collecting standpipe, rainwater purification ecology cell body and personal water tank, personal water tank and rainwater purification near wall are given birth to State cell body Side by side groupings, rainwater water inlet standpipe and rainwater-collecting standpipe are respectively provided at rainwater purification ecology cell body two ends, and rainwater is net Metaplasia state cell body is divided into some sections, is arranged alternately with anoxic denitrification section by aerobic nitrification section successively;Rainwater purification is given birth to State cell body end section is chemical dephosphorization filler module;
The aerobic nitrification section is sequentially provided with packing layer, plantation soil layer and green plants from the bottom to top;The anoxic denitrification Section includes anoxic case, and anoxic case fills biological pebblepacking, anoxic case built with deflection plate up and down staggeredly, between deflection plate The bottom of influent side sets the inlet opening of multiple previous aerobic nitrification sections of connection, and the top of anoxic case water outlet side is equipped with connection The latter water distribution osmos tube of aerobic nitrification section, anoxic case top surface arrangement lawn layer;
Water inlet osmos tube is connected on rainwater water inlet standpipe, water inlet osmos tube inserts the first aerobic nitrification section using 90 ° of bend pipes In plantation soil layer, the exhalant region of chemical dephosphorization filler module is provided with the connected entrance of the personal water tank of connection, in personal water tank Bottom correspondence aerobic nitrification section is provided with the recycle-water perforation sparge pipe in embedded packing layer, the master of recycle-water perforation sparge pipe Check valve is housed, personal water tank top is provided with overflow outlet pipe, and overflow outlet pipe is connected with rainwater-collecting standpipe on pipe.
The technology of the present invention effect is:
The present invention is arranged in building vertical elevation, takes full advantage of the elevation space of building;Using rainwater purification ecology cell body and The water-holding capacity of personal water tank, plays reduction rainfall, mitigates the effect for crossing flowing pressure of Storm Sewer Network;Reduce SS, While the pollutants such as CODcr, the alternate treatment effect using aerobic nitrification bacterium and anoxic denitrification bacterium can strengthen the de- of rainwater Nitrogen effect, chemical dephosphorization module is employed in device outlet water at tail end, it is ensured that the phosphorus concentration of water outlet is up to standard;Each device is individually furnished with Personal water tank, automatic water supplement of the water tank to device is realized by check valve, without consuming other energy, solves green plants In the water supply problem of dry spell, unnecessary rainwater by rainwater-collecting standpipe convey for subsequently he;Realize noise reduction, lay the dust, Reduce light pollution, improve environment miniclimate, multiple to building surface protection, pollutant fluxes, rainwater utilization and footpath flow control etc. Effect.
Brief description of the drawings
Brief description of the drawings of the invention is as follows:
Fig. 1 is the plan of upper epidermis of the present invention;
Fig. 2 is the plan of bottom surface in the present invention;
Fig. 3 is the sectional view of B-B in Fig. 1;
Fig. 4 is the sectional view of A-A in Fig. 1;
Fig. 5 is the sectional view of C-C in Fig. 1.
In figure:1st, recycle-water perforation sparge pipe;2nd, rainwater purification ecology cell body;3rd, chemical dephosphorization filler module;4th, it is aerobic Nitrification section;5th, packing layer;6th, rainwater water inlet standpipe;7th, overfall;8th, water inlet osmos tube;9th, anoxic denitrification section; 10、 Lawn layer;11st, rainwater-collecting standpipe;12nd, connected entrance;13rd, personal water tank;14th, check valve;15th, overflow outlet pipe;16th, plant Plant soil layer;17th, green plants;18th, anoxic case;19th, deflection plate;20th, inlet opening;21st, water distribution osmos tube.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples:
As depicted in figs. 1 and 2, the present invention includes rain water inlet standpipe 6, rainwater-collecting standpipe 11, rainwater purification ecology cell body 2 With personal water tank 13, the personal water tank 13 and the rainwater purification ecology Side by side groupings of cell body 2 of wall, rainwater water inlet standpipe are close to 6 and rainwater-collecting standpipe 11 be respectively provided at rainwater purification ecology cell body 2 two ends, 2 points of rainwater purification ecology cell body is some sections, It is arranged alternately with anoxic denitrification section 9 by aerobic nitrification section 4 successively;Rainwater purification ecology cell body 2 end section is chemistry Dephosphorization filler module 3;
As shown in figure 3, the aerobic nitrification section 4 is sequentially provided with packing layer 5, plantation soil layer 16 and green plants from the bottom to top 17;As shown in Figure 4 and Figure 5, the anoxic denitrification section 9 includes anoxic case 18, and anoxic case 18 is built with folding up and down staggeredly Stream plate 19, fills biological pebblepacking between deflection plate 19, the multiple connections of bottom setting of the influent side of anoxic case 18 are previous good Oxygen nitrifies the inlet opening 20 of section, and the top of the water outlet side of anoxic case 18 is equipped with latter aerobic nitrification section of connection with water penetration Pipe 21, the top surface of anoxic case 18 arrangement lawn layer 10;
As shown in Fig. 2, Fig. 3 and Fig. 5, water inlet osmos tube 8 is connected on rainwater water inlet standpipe 6, water inlet osmos tube 8 uses 90 ° of bend pipes Insert in the plantation soil layer 16 of the first aerobic nitrification section, the exhalant region of chemical dephosphorization filler module 3 is provided with the personal water of connection The connected entrance 12 of water tank 13, the reuse in the personal bottom of water tank 13 correspondence aerobic nitrification section is provided with embedded packing layer 5 Water perforation sparge pipe 1, is equipped with check valve 14 on the supervisor of recycle-water perforation sparge pipe 1, the personal top of water tank 13 is provided with excessive Outflow water pipe 15, overflow outlet pipe 15 is connected with rainwater-collecting standpipe 11.
Can play a part of to evenly distribute rainwater at the rainwater water inlet standpipe 6 and the connector of water inlet osmos tube 8.
As shown in figure 5, the bottom of the described influent side of anoxic case 18 sets inlet opening 20, inlet opening 20 sets coarse rack. Anoxic case sets deflection plate 19, and baffle(s) spacing is used by narrow arrangement gradually wide, prevents short stream.Described anoxic case 18 Water outlet side sets water distribution osmos tube 21, and water distribution osmos tube 21 is embedded in the top layer of plantation soil layer 16, plays a part of uniform water distribution.
Described chemical dephosphorization filler module 3 can be regularly replaced, water outlet contact with inorganic metal salt medicament, be made molten in water The salt of solution property(Such as phosphate)Reaction generation graininess, the material of non-solubility.
As shown in figure 5, with water inlet osmos tube 8 junction below rainwater water inlet standpipe 6 on be provided with overfall 7, overflow The absolute altitude of mouth 7 should be between the plantation elevation of top of soil layer 16 and the rainwater purification ecology surrounding elevation of top of cell body 2.
As shown in Fig. 2 check valve 14 is set on the supervisor of described recycle-water perforation sparge pipe 1, can be according to the He of packing layer 5 The size of head controls the keying of the valve of itself in plantation soil layer 16, plays a part of timely moisturizing.The characteristic ratio of packing layer 5 Surface area is big, and absorption property is good, and ion-exchange capacity is strong, and stable chemical performance, hydraulic conductivity is larger, can make the reoxygenation of device Ability strengthens, and improves the removal effect of pollutant.
One layer of primary soil is laid on the described upper strata of plantation soil layer 16, is mixed with haydite using soil, can in right amount add few Amount aluminium salt and molysite.
Described green plants 17 preferably select indigenous plant, and survival rate is high, and maintenance cost is relatively low.The plant of selection need to expire Based on sufficient shallow root, impoverishment tolerant, cold-resistant, drought-enduring strong positive or strong feminine gender Climbing Plant.
Determine after carrying out lab scale according to local storm intensity and environmental condition, adjust the chi of apparatus of the present invention each several part Very little, material, plant, reach excellent operating condition.
Operation principle of the invention is:
Rainfall initial stage, rainwater collects to form runoff on roof, and rainwater enters rainwater water inlet standpipe along roof drain, is oozed by water inlet Saturating pipe 8 flows into the plantation soil layer of aerobic nitrification section, and the oxygen that photosynthesis of plant is produced is transported to root by aerating tissue, The microenvironment of oxidation state is formed in the medium of root area reduction-state, aerobic region promotes microorganism that nitrification occurs, rich in nitre Plantation soil layer 16, packing layer 5 are crossed in the rain penetration of state nitrogen, enter anoxic case 18 by the inlet opening 20 of anoxic case, by anoxic case The guide functions of 18 internal baffles 19, increased the hypoxic exposure of rainwater, denitrification occur in the presence of denitrifying bacterium anti- Should, realize rainwater one-level denitrogenation.Then rainwater enters water distribution osmos tube 21 from anoxic case 18, is entered by the perforate of water distribution osmos tube 21 Enter the plantation soil layer 16 of next stage, repeat the process of the above, realize plural serial stage treatment, enhance the denitrification effect of rainwater. Chemical dephosphorization filler module 3 is used in afterbody, it is ensured that water outlet phosphorus concentration is up to standard.Then personal water water is entered by intercommunicating pore 12 Case 13, unnecessary rainwater enters rainwater-collecting standpipe 11 by overflow outlet pipe 15, and the end of rainwater-collecting standpipe 11 can receive collection Pond, for water such as follow-up greenings.
With the increase of rainfall, the increase of Roof Runoff causes to build the table of vertical greening rainwater-collecting and reclamation set Area dilutional hyponatremia, unnecessary rainwater enters rainwater water inlet standpipe 6 by overfall 7, supplies next layer of building vertical greening rainwater Collect the water inlet with reclamation set.
Without the rain stage, the rainwater of storage passes through multiple recycle-waters perforation sparge pipe 1 of the personal bottom of water tank 13, due to certainly With water tank 13 and plantation soil layer 16, the head difference of packing layer 5, automatically open up on the supervisor of each recycle-water perforation sparge pipe 1 Check valve 14, flow into packing layer 5, by capillarity feed plantation soil layer 16 in root system of plant growth.When personal water water When case 13 is equal with the head of plantation soil layer 16, the both sides of packing layer 5, check valve 14 is closed, and stops supplying water.
The present invention is applied in skyscraper, is existed by rainwater water inlet 6, rainwater-collecting standpipe 11 of standpipe and configuration Multilayer rainwater purification ecology cell body 2 and the assembly of personal water tank 13 of exterior wall are constituted, and the water inlet of rainwater water inlet standpipe 6 is roofing The rainwater of collection, rainwater water inlet standpipe 6 intakes the water distributions of osmos tube 8 in multilayer rainwater purification ecology cell body 2 by multiple respectively, and Its end is connected with cell Storm Sewer Network.Rainwater-collecting standpipe 11 is connected with the overflow outlet pipe 15 of the personal water tank 13 of multilayer, And cell rainwater collection pool is accessed in its end, for other purposes such as follow-up greenings.So the present invention has autgmentability, can be used for Low-rise building, is also applied for skyscraper.
It is of the invention to have the advantage that:1st, building vertical elevation is arranged in, the elevation space of building is taken full advantage of;2nd, profit With the water-holding capacity of vertical greening device, reduction rainfall is played, mitigate the effect for crossing flowing pressure of Storm Sewer Network;3rd, in reduction While the pollutants such as SS, CODcr, the alternate treatment effect using aerobic nitrification bacterium and anoxic denitrification bacterium can strengthen rainwater Denitrification effect, chemical dephosphorization module is employed in device outlet water at tail end, it is ensured that the phosphorus concentration of water outlet is up to standard;4th, each device is independent Equipped with personal water tank, automatic water supplement of the water tank to device is realized by check valve, without consuming other energy, solve green Water supply problem of the plant in the dry spell, unnecessary rainwater by rainwater-collecting standpipe convey for subsequently he;5 and existing sponge The low influence development facility of urban construction guide(Green Roof, concave herbaceous field, ecological tree pond etc.)It is used in combination, especially in water The nervous area of land used, saves the area between out of the void;6th, noise reduction is realized, is laid the dust, is reduced light pollution, improving environment miniclimate, right The multi-efficiencies such as building surface protection, pollutant fluxes, rainwater utilization and footpath flow control.

Claims (4)

1. it is a kind of to build vertical greening rainwater-collecting and reclamation set, it is characterized in that:Including rain water inlet standpipe(6), rainwater Collect standpipe(11), rainwater purification ecology cell body(2)With personal water tank(13), near the personal water tank of wall(13)With rain Water warfare ecology cell body(2)Side by side groupings, rainwater water inlet standpipe(6)With rainwater-collecting standpipe(11)It is respectively provided at rainwater purification life State cell body(2)Two ends, rainwater purification ecology cell body(2)It is divided into some sections, successively by aerobic nitrification section(4)With the anti-nitre of anoxic Change section(9)It is arranged alternately;Rainwater purification ecology cell body(2)End section is chemical dephosphorization filler module(3);
The aerobic nitrification section(4)Packing layer is sequentially provided with from the bottom to top(5), plantation soil layer(16)And green plants(17); The anoxic denitrification section(9)Including anoxic case(18), anoxic case(18)Built with deflection plate up and down staggeredly(19), baffling Plate(19)Between fill biological pebblepacking, anoxic case(18)The bottom of influent side sets multiple previous aerobic nitrification areas of connection The inlet opening of section(20), anoxic case(18)The top of water outlet side is equipped with the latter water distribution osmos tube of aerobic nitrification section of connection (21), anoxic case(18)Top surface arrangement lawn layer(10);
Rainwater water inlet standpipe(6)Upper connection water inlet osmos tube(8), osmos tube of intaking(8)The first aerobic nitre is inserted using 90 ° of bend pipes Change the plantation soil layer of section(16)In, chemical dephosphorization filler module(3)Exhalant region be provided with the personal water tank of connection(13)'s Connected entrance(12), in personal water tank(13)Bottom correspondence aerobic nitrification section(4)It is provided with embedded packing layer(5)In reuse Water perforation sparge pipe(1), recycle-water perforation sparge pipe(1)Supervisor on be equipped with check valve(14 ), water tank of using by oneself(13)Top It is provided with overflow outlet pipe(15), overflow outlet pipe(15)With rainwater-collecting standpipe(11)Connection.
2. it is according to claim 1 to build vertical greening rainwater-collecting and reclamation set, it is characterized in that:The inlet opening (20)Coarse rack, the deflection plate are set(19)Spacing is used by narrow arrangement gradually wide.
3. it is according to claim 1 to build vertical greening rainwater-collecting and reclamation set, it is characterized in that:With enter water penetration Pipe(8)Rainwater water inlet standpipe below junction(6)On be provided with overfall(7), overfall(7)Absolute altitude should between plantation soil layer (16)Elevation of top and rainwater purification ecology cell body(2)Between surrounding elevation of top.
4. it is according to claim 1 to build vertical greening rainwater-collecting and reclamation set, it is characterized in that:In personal water tank (13)The overflow outlet pipe on top(15), its absolute altitude should be between plantation soil layer(16)Elevation of top and overfall(7)Between.
CN201710229646.0A 2017-04-10 2017-04-10 A kind of building vertical greening rainwater-collecting and reclamation set Active CN106836373B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2482482A (en) * 2010-08-02 2012-02-08 Useful And Practical Ideas Ltd Plant holder with a plurality of apertures
CN103204607A (en) * 2013-03-29 2013-07-17 北京工业大学 Integrated sewage treatment device with high efficiency and low consumption and treatment method
CN205030222U (en) * 2015-08-11 2016-02-17 重庆任甲生物科技有公司 Biological treatment system of perpendicular wall body
CN105821923A (en) * 2016-03-11 2016-08-03 河南科技学院 Vertical greening rainwater utilizing structure for wall face of building
CN105967435A (en) * 2016-04-20 2016-09-28 安徽华骐环保科技股份有限公司 Double-circulation nitrogen and phosphorus removal wastewater treatment system and process
CN205838684U (en) * 2016-06-25 2016-12-28 湖南宝信云建筑综合服务平台股份有限公司 A kind of flower bed diafiltration clean device purified for roof rain water

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2482482A (en) * 2010-08-02 2012-02-08 Useful And Practical Ideas Ltd Plant holder with a plurality of apertures
CN103204607A (en) * 2013-03-29 2013-07-17 北京工业大学 Integrated sewage treatment device with high efficiency and low consumption and treatment method
CN205030222U (en) * 2015-08-11 2016-02-17 重庆任甲生物科技有公司 Biological treatment system of perpendicular wall body
CN105821923A (en) * 2016-03-11 2016-08-03 河南科技学院 Vertical greening rainwater utilizing structure for wall face of building
CN105967435A (en) * 2016-04-20 2016-09-28 安徽华骐环保科技股份有限公司 Double-circulation nitrogen and phosphorus removal wastewater treatment system and process
CN205838684U (en) * 2016-06-25 2016-12-28 湖南宝信云建筑综合服务平台股份有限公司 A kind of flower bed diafiltration clean device purified for roof rain water

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