CN102418426A - Double-layer undercurrent artificial wetland landscape pond and method thereof for recovering and treating urban roof rainwater - Google Patents
Double-layer undercurrent artificial wetland landscape pond and method thereof for recovering and treating urban roof rainwater Download PDFInfo
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- CN102418426A CN102418426A CN2011102433761A CN201110243376A CN102418426A CN 102418426 A CN102418426 A CN 102418426A CN 2011102433761 A CN2011102433761 A CN 2011102433761A CN 201110243376 A CN201110243376 A CN 201110243376A CN 102418426 A CN102418426 A CN 102418426A
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Abstract
The invention discloses a double-layer undercurrent artificial wetland landscape pond and method thereof for recovering and treating urban roof rainwater, relates to a landscape reservoir and a method thereof for recovering and treating urban rainwater, and aims to solve the problem that the rainwater recovery system cannot meet the requirements of continuously purifying and treating rainwater all the year around in northern cold-region cities. The double-layer undercurrent artificial wetland landscape pond consists of a landscape pond, upper layer horizontal undercurrent, a partition plate layer, lower layer horizontal undercurrent, a foundation layer, a water inlet regulating reservoir, a collection tank, a submersible pump, a circulating pipe, a drain pipe, a left water separation valve, a right water separation valve, a left filter wall, a right filter wall and a metal grille. The method specifically comprises the following steps of: 1, collecting rainwater; 2, coagulating and precipitating; 3, filtering; 4, performing ultraviolet sterilization; 5, injecting into the double-layer undercurrent artificial wetland landscape pond to perform deep processing; and 6, making the treated rainwater for later use. The pond and the method are mainly used for rainwater recovery and recycling and urban beautification of the northern cold-region cities.
Description
Technical field
The present invention relates to the method for view reservoir and recycling urban rainwater thereof.
Background technology
Rainwater taking back and process technology is generally paid attention under the trend of current urban ecology construction; Various retaining prevention waterlogging system engenders, concludes and gets up to mainly contain following three kinds of modes: discongest formula retaining prevention waterlogging system, accumulate formula retaining prevention waterlogging system and the formula retaining of infiltrating prevention waterlogging system.Not only conserve water resource appears in retaining prevention waterlogging system, has also beautified our city simultaneously.Condition restriction is bigger but existing equipment receives weather, and winter, treatment effect was relatively poor; Floor space is relatively large, and specific load is smaller.Especially in city, northern cold ground because winter is very long, weather is harsh, adopts existing rainwater taking back and process technology can't realize continuing throughout the year to carry out the purification and the processing requirements of rainwater in the three grades of operations of spring and summer autumn; Therefore the existence of existing rainwater taking back and process technology can not be satisfied the problem that city, northern cold ground continues to carry out the purification and the processing of rainwater throughout the year.
Summary of the invention
The present invention seeks to solve the existence of existing rainwater taking back and process technology and can not satisfy the problem that city, northern cold ground continues to carry out the purification and the processing of rainwater throughout the year, and the method for a kind of double-deck drowned flow artificial wet land landscape pond and recycling Urban roof rainwater thereof is provided.
Double-deck drowned flow artificial wet land landscape pond of the present invention is filtered wall, is rightly filtered wall and metallic grid is formed by view pond, upper strata horizontal drowned flow, carrier ring, lower floor's horizontal drowned flow, ground layer, water inlet regulating reservoir, collection joint pond, submersible pump, circulating water pipe, tapping pipe, left water proof valve, right water proof valve, a left side; The view pond is arranged on horizontal drowned flow top, upper strata; The upper strata horizontal drowned flow is laid on the carrier ring top; Be provided with lower floor's horizontal drowned flow between carrier ring and the ground layer; In the view pond, a side of upper strata horizontal drowned flow and lower floor's horizontal drowned flow is provided with into water regulating reservoir, and opposite side is provided with collection joint pond, adopts a left side to filter will intake regulating reservoir and view pond, upper strata horizontal drowned flow and lower floor's horizontal drowned flow of wall and separates; And the water inlet regulating reservoir is divided into two parts up and down by carrier ring and left water proof valve; Adopt the right wall that filters collect the joint pond and separate, and collection joint pond is divided into three parts in upper, middle and lower by carrier ring, right water proof valve and metallic grid, submersible pump is set collecting on the ground layer that saves the bottom, pond with view pond, upper strata horizontal drowned flow and lower floor's horizontal drowned flow; On the ground layer of bottom side tapping pipe is set, submersible pump is connected with the view pond through circulating water pipe.
Utilize the method for double-deck drowned flow artificial wet land landscape pond recycling Urban roof rainwater, specifically accomplish according to the following steps: one, collect rainwater; Two, coagulating sedimentation; Three, filter; Four, ultraviolet-sterilization; Five, inject double-deck drowned flow artificial wet land landscape pond of the present invention and carry out advanced treating; Six, the rainwater after the processing is subsequent use.
Contrast existing system for reclaiming rainwater, there is advantage in the method for the double-deck drowned flow artificial wet land landscape pond recycling of utilization provided by the invention Urban roof rainwater: the purification and the processing requirements of one, realizing continuing throughout the year to carry out rainwater; Two, except planting original water plant, in wetland, add efficient engineering microbial inoculum in addition, effectively improve winter low temperature phase clean-up effect; Three, increase pretreatment system, improve water inlet stability, reduced impact load, adopt the preaeration oxygen supply to improve the treatment effect of wetland, avoid the generation of anaerobic conditions; Four, the sewage of handling through the over-wet land passes through the landscape water body treatment system once more, reaches the effect of landscape water reuse, has not only further purified water quality, also views and admires view for city and small towns provide.
Description of drawings
Fig. 1 is the structural representation of double-deck drowned flow artificial wet land landscape pond.
The specific embodiment
The specific embodiment one: combine a kind of double-deck drowned flow artificial wet land landscape pond of this embodiment of Fig. 1, concrete structure is following:
Double-deck drowned flow artificial wet land landscape pond is filtered wall 14, is rightly filtered wall 15 and metallic grid 16 is formed by view pond 1, upper strata horizontal drowned flow 2, carrier ring 3, lower floor's horizontal drowned flow 4, ground layer 5, water inlet regulating reservoir 6, collection joint pond 7, submersible pump 8, circulating water pipe 9, tapping pipe 10, left water proof valve 12, right water proof valve 13, a left side; View pond 1 is arranged on the upper strata horizontal drowned flow 2; Upper strata horizontal drowned flow 2 is laid on carrier ring 3 tops; Be provided with lower floor's horizontal drowned flow 4 between carrier ring 3 and the ground layer 5; In view pond 1, a side of upper strata horizontal drowned flow 2 and lower floor's horizontal drowned flow 4 is provided with into water regulating reservoir 6; And opposite side is provided with collection joint pond 7; Adopt a left side to filter wall 14 regulating reservoir 6 of will intake and separate, and water inlet regulating reservoir 6 is divided into two parts up and down by carrier ring 3 and left water proof valve 12, adopt the right wall 15 that filters collect and save pond 7 and view pond 1, upper strata horizontal drowned flow 2 and lower floor's horizontal drowned flow 4 separate with view pond 1, upper strata horizontal drowned flow 2 and lower floor's horizontal drowned flow 4; And collection joint pond 7 is divided into three parts in upper, middle and lower by carrier ring 3, right water proof valve 13 and metallic grid 16; On the ground layer 5 of collection joint 7 bottoms, pond, submersible pump 8 is set, tapping pipe 10 is set on the bottom side ground layer 5, submersible pump 8 is connected with view pond 1 through circulating water pipe 9.
Can be set to Hua Chi, landscape lawn, water plant planting pond or landscape pond on the view pond 1 of the double-deck drowned flow artificial wet land landscape pond of this embodiment, perhaps be set to water landscapes such as fountain, folded water, waterwall, instillation.Mainly move upper strata horizontal drowned flow 2 at spring, summer, Qiu Sanji; Water proof valve in the water inlet regulating reservoir 6 is in closed condition; When the storm period rainfall is excessive; Can open the left water proof valve 12 in the water regulating reservoir 6 into, start upper strata horizontal drowned flow 2 and lower floor's horizontal drowned flow 4 purified treatment rainwater together simultaneously, prevent that rainwater from overflowing; Right water proof valve 13 in spring, summer, Qiu Sanji collection joint pond is in opening; Rainwater after purified treatment is through submersible pump 8; Send the face of land back to through circulating water pipe 9; Can be used for greening water spill, carwash, water for fire, the moisturizing of view pond and large-size air conditioning system cools tower water etc., on the bottom ground layer in collection joint pond tapping pipe 10 is set, regularly remove mud.Mainly move lower floor's horizontal drowned flow winter; Open the left water proof valve 12 in the water inlet regulating reservoir 6; Rainwater that spring, summer, autumn have been untreated and snow-broth (be mainly roofing and garden lawn accumulated snow forms after treatment) are put into into water regulating reservoir 6 bottoms and lower floor's horizontal drowned flow 4; Close the right water proof valve 13 in left water proof valve 12 and the collection joint pond 7 in the water regulating reservoir 6 into then; Utilize 4 pairs of rainwater of lower floor's horizontal drowned flow or snow-broth to carry out advanced treating, rainwater after purified treatment or snow-broth can be used for carwash and water for fire, perhaps retain to 1 year spring to be used to clean street mud.
The double-deck drowned flow artificial wet land landscape pond of this embodiment is in storm period; Can store a large amount of rainwater, alleviate the pressure of heavy rain, as a kind of prevention waterlogging system of integral body urban sewerage and drainage system; Can also the rainwater that gently pollutes be recycled simultaneously, reduce cost of water treatment.
This embodiment realizes continuing throughout the year to carry out the purification and the processing requirements of rainwater.
This embodiment adds efficient engineering microbial inoculum in addition except planting original water plant in wetland, effectively improve winter low temperature phase clean-up effect.
This embodiment increases pretreatment system, improves water inlet stability, has reduced impact load, adopts the preaeration oxygen supply to improve the treatment effect of wetland, avoids the generation of anaerobic conditions.
The sewage that this embodiment is handled through the over-wet land passes through the landscape water body treatment system once more, reaches the effect of landscape water reuse, has not only further purified water quality, also views and admires view for city and small towns provide.
The specific embodiment two: this embodiment with the specific embodiment one difference is: described view pond 1 is soil or water.Other is identical with the specific embodiment one.
When the view pond 1 of this embodiment is soil, can in view pond 1, plant flowers and plants; When view pond 1 is water, can be in view pond 1 planting aquatic plants, also can in view pond 1, water landscape be set, like water landscapes such as fountain, folded water, waterwall, instillation.
The specific embodiment three: this embodiment with one of the specific embodiment one or two difference is: the main preparation material of described upper strata horizontal drowned flow 2 is cobble, lava, zeolite.Other is identical with the specific embodiment one or two.
The double-deck drowned flow artificial wet land landscape pond of this embodiment, adopting cobble, lava, zeolite is that the upper strata horizontal drowned flow 2 that primary raw material prepares can play the effect of filtering and supporting.
The specific embodiment four: this embodiment with one of the specific embodiment one to three difference is: described lower floor horizontal drowned flow 4 is to adopt various filtrates as carrier; Add efficient engineering microbial inoculum; Described filtrate is zeolite, pelelith, active carbon or bamboo carbon; Described efficient engineering microbial inoculum is efficient COD degradation bacteria, PSB photosynthetic bacteria or nitrifier, and is wherein said; Efficient COD degradation bacteria is a Clostridium Daqing sp.nov. (preserving number: CGMCC No.1911); Wherein said PSB photosynthetic bacteria is that (preserving number: ACCC10657), wherein said nitrifier is a Nitrobacter sp (preserving number: ATCC-25388 to Pseudomonas sp
TM).Other is identical with the specific embodiment one to three.
The double-deck drowned flow artificial wet land landscape pond of this embodiment owing to adopt various filtrates as carrier, plays the effect of filtering and adsorbing pollutant and microorganism immobilization carrier, adopts efficient engineering microbial inoculum that sewage is carried out advanced treating.
The specific embodiment five: this embodiment with one of the specific embodiment one to four difference is: described ground layer 5 from top to bottom divides has the floating layer of cement mortar 5-1, waterproofing course 5-2, cement mortar screeding layer 5-3, reinforced concrete floor 5-4, C15 layer of concrete 5-5, grey soil layer 5-6 and rammed earth layer 5-7.Other is identical with the specific embodiment one to four.
The specific embodiment six: this embodiment with one of the specific embodiment one to five difference is: the last device of described circulating water pipe 9 and tapping pipe 10 has anti-hydrofoil ring 11.Other and the specific embodiment one to five are together.
The double-deck drowned flow artificial wet land landscape pond of this embodiment owing to there is anti-hydrofoil ring to prevent pipe leakage and corrosion, also is a kind of protective effect to pipeline simultaneously.
The specific embodiment seven: this embodiment with one of the specific embodiment one to six difference is: ground layer 5 both sides at described submersible pump 8 places increase one deck ash soil layer.Other and the specific embodiment one to six phase are together.
The double-deck drowned flow artificial wet land landscape pond of this embodiment, increasing one deck ash soil layer in ground layer 5 both sides at submersible pump 8 places is in order to play the anti-reinforcement effect that blends.
The specific embodiment eight: this embodiment with one of the specific embodiment one to seven difference is: what fill in the described water inlet regulating reservoir 6 is the bigger filler in space: activated carbon, zeolite or tourmaline.Other is identical with the specific embodiment one to seven.
The double-deck drowned flow artificial wet land landscape pond of this embodiment, adopting the bigger filler in space mainly is the filtration of playing the bulky grain thing.
The specific embodiment nine: this embodiment with one of the specific embodiment one to eight difference is: it is by reinforcing bar and grid preparation with the right wall 15 that filters that wall 14 is filtered on a described left side.Other is identical with the specific embodiment one to eight.
The double-deck drowned flow artificial wet land landscape pond of this embodiment adopts reinforcing bar can play the stabilization of building framework and pond body structure, and the employing grid stops the filler in the water regulating reservoir 6 into, and can guarantee to filter out the bulky grain in the sewage.
The specific embodiment ten: this embodiment utilizes the specific embodiment one described double-deck drowned flow artificial wet land landscape pond that a kind of method that recycles the Urban roof rainwater is provided, and specifically accomplishes according to the following steps:
One, collects rainwater; Two, coagulating sedimentation; Three, filter; Four, ultraviolet-sterilization; Five, inject the specific embodiment one described double-deck drowned flow artificial wet land landscape pond and carry out advanced treating; Six, the rainwater after the processing is subsequent use.
This embodiment is a method of utilizing double-deck drowned flow artificial wet land landscape pond recycling Urban roof rainwater, and this method not only can have been saved the urban green space through being used for the support to the view in view pond to polluting after lower rainwater is handled; The maintenance cost of water landscape; But also can the water in the collection joint pond be used to water spill, the various aspects of lives such as carwash, water for fire, in storm period, through moving upper strata horizontal drowned flow and lower floor's horizontal drowned flow simultaneously; Alleviate the pressure of heavy rain to urban sewerage and drainage system; As a kind of prevention waterlogging system of integral body, can also the rainwater that gently pollutes be recycled simultaneously, reduce cost of water treatment.
Rainwater at rainfall initial stage COD near 80～120mg/L; SS is in 70mg/L～90mg/L scope, and TP is near 0.4mg/L, through behind the initial stage runoff; Rainwater water quality improves; Rainfall later stage COD is 20mg/L～18mg/L, and SS is 10mg/L～8mg/L, after the processing of this embodiment in the reservoir COD value of water be 13～16mg/L; Suspension 3～6mg/L, water quality reach " building with sub-district rainwater utilization engineering legislation " (GB50400-2006) with " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) in the regenerated water water quality requirement.
This embodiment is applicable to the comprehensive development of the other landscape planting carrying space of Gongjian's cohort or residential community; Can combine housing estate storm-water drainage open channel, the buried large-scale reservoir in city, fire cistern to use; Or the path space that utilizes the city carries out combining of rainwater reuse and view; Both can be used as independently rainwater recovery and city prevention waterlogging system, also can be used as a plug-in cycling element of original urban sewerage and drainage system, all can use in big or middle and small city.
This embodiment realizes continuing throughout the year to carry out the purification and the processing requirements of rainwater.
This embodiment adds efficient engineering microbial inoculum in addition except planting original water plant in wetland, effectively improve winter low temperature phase clean-up effect.
This embodiment increases pretreatment system, improves water inlet stability, has reduced impact load, adopts the preaeration oxygen supply to improve the treatment effect of wetland, avoids the generation of anaerobic conditions.
The sewage that this embodiment is handled through the over-wet land passes through the landscape water body treatment system once more, reaches the effect of landscape water reuse, has not only further purified water quality, also views and admires view for city and small towns provide.
The specific embodiment 11: this embodiment with the difference of the specific embodiment ten is: the coagulating sedimentation described in the step 2 is that rainwater is injected the high density sedimentation basin; Add aluminium polychloride and polyacrylamide coagulation; The addition of aluminium polychloride is 10mg/L～20mg/L, and the addition of polyacrylamide is that 1mg/L～5mg/L, hydraulic detention time are 10min～30min.Other is identical with the specific embodiment ten.
The specific embodiment 12: this embodiment with one of the specific embodiment ten or 11 difference is: the coagulating sedimentation described in the step 2 is that rainwater is injected the high density sedimentation basin; Add aluminium polychloride and polyacrylamide coagulation; The addition of aluminium polychloride is 15mg/L, and the addition of polyacrylamide is that 3mg/L, hydraulic detention time are 20min.Other is identical with the specific embodiment ten or 11.
The specific embodiment 13: this embodiment with one of the specific embodiment ten to 12 difference is: the filtration described in the step 3 is that rainwater is injected V-type filter tank through the drainage pump, and the filtering velocity in V-type filter tank is 4～15m/h, and gas is 130L/s.m towards intensity
2～160L/s.m
2Other is identical with one of the specific embodiment nine or 11.
The specific embodiment 14: this embodiment with one of the specific embodiment ten to 13 difference is: the filtration described in the step 3 is that rainwater is injected V-type filter tank through the drainage pump, and the filtering velocity in V-type filter tank is 10m/h, and gas is 150L/s.m towards intensity
2Other is identical with the specific embodiment ten or 13.
The specific embodiment 15: this embodiment with one of the specific embodiment ten to 14 difference is: the uitraviolet intensity of the ultraviolet sterilization described in the step 4 is 150uW/cm
2～250uW/cm
2, sterilizing time is 30min～50min.Other is identical with the specific embodiment ten or 14.
The specific embodiment 16: this embodiment with one of the specific embodiment ten to 15 difference is: the uitraviolet intensity of the ultraviolet sterilization described in the step 4 is 200uW/cm
2, sterilizing time is 40min.Other is identical with the specific embodiment ten or 15.
The specific embodiment 17: this embodiment with one of the specific embodiment ten to 16 difference is: inject the specific embodiment one described double-deck drowned flow artificial wet land landscape pond described in the step 5 and carry out advanced treating; Specifically be to carry out according to the following steps: when spring, summer, Qiu Sanji; After rainwater is collected; After coagulating sedimentation, filtration and ultraviolet sterilization are handled, feed in the double-deck drowned flow artificial wet land landscape pond; Filter out particle diameter >=1mm solid particle through water inlet regulating reservoir 6 tops, filter wall 14 injection upper strata horizontal drowned flows 2 through a left side then, utilize the compound action in upper strata horizontal drowned flow 2 and view pond 1 that the rainwater after filtering through water inlet regulating reservoir 6 tops is carried out advanced treating; Filter wall 15 through the right side at last and import in the collection joint ponds 7, change reservoir over to or send face of land utilization back to through submersible pump 8; Put into the into bottom of water regulating reservoir 6 with the rainwater after coagulating sedimentation, filtration and ultraviolet sterilization are handled that spring, summer, Qiu Sanji collect winter; Filter wall 14 through a left side then and inject lower floor's horizontal drowned flow 4; The rainwater that utilizes the efficient engineering microbial inoculum in lower floor's horizontal drowned flow 4 to pass through after filter water inlet regulating reservoir 6 bottoms carries out advanced treating; Import in the collection joint ponds 7 through right side filtration wall 15 at last, going underground through submersible pump 8 is incubated reservoir or sends face of land utilization back to.
Insulation effect is played to bottom, lower floor's horizontal drowned flow 4 and collecting-tank 7 middle parts and the top of water inlet regulating reservoir 6 in water inlet regulating reservoir 6 tops, view pond 1, upper strata horizontal drowned flow 2, carrier ring 3 and collecting-tank 7 tops of the double-deck drowned flow artificial wet land landscape pond of this embodiment utilization, guarantees can normally move in the winter time.
The left side of the double-deck drowned flow artificial wet land landscape pond of this embodiment is filtered wall 14 and is filtered wall 15 because the influence of efficient engineering microbial inoculum can be adhered to one deck biomembrane with right, increases filter effect.
Efficient engineering microbial inoculum in the said lower floor of this embodiment horizontal drowned flow 4 is efficient COD degradation bacteria, PSB photosynthetic bacteria or nitrifier; Wherein said efficient COD degradation bacteria is a Clostridium Daqing sp.nov. (preserving number: CGMCCNo.1911); Wherein said PSB photosynthetic bacteria is that (preserving number: ACCC10657), wherein said nitrifier is a Nitrobacter sp (preserving number: ATCC-25388 to Pseudomonas sp
TM).
The specific embodiment 18: this embodiment utilizes the specific embodiment nine described double-deck drowned flow artificial wet land landscape ponds that a kind of method of recycling the Urban roof rainwater is provided, and specifically accomplishes according to the following steps: one, collect rainwater; Two, coagulating sedimentation; Three, filter; Four, ultraviolet-sterilization; Five, inject the specific embodiment nine described double-deck drowned flow artificial wet land landscape ponds and carry out advanced treating; Six, the rainwater after the processing is subsequent use.
Coagulating sedimentation described in this embodiment step 2 is that rainwater is injected the high density sedimentation basin; Add aluminium polychloride and polyacrylamide coagulation; The addition of aluminium polychloride is 15mg/L, and the addition of polyacrylamide is that 3mg/L, hydraulic detention time are 20min.
Filtration described in this embodiment step 3 is that rainwater is injected V-type filter tank through the drainage pump, and the filtering velocity in V-type filter tank is 10m/h, and gas is 150L/s.m towards intensity
2
The uitraviolet intensity of the ultraviolet sterilization described in this embodiment step 4 is 200uW/cm
2, sterilizing time is 40min.
Adopting double-layer artificial wetland system to carry out advanced treating described in this embodiment step 5 is to carry out according to the following steps: when spring, summer, Qiu Sanji; After rainwater is collected; After coagulating sedimentation, filtration and ultraviolet sterilization are handled, feed in the double-deck drowned flow artificial wet land landscape pond; Filter out particle diameter >=1mm solid particle through water inlet regulating reservoir 6 tops, filter wall 14 injection upper strata horizontal drowned flows 2 through a left side then, utilize the compound action in upper strata horizontal drowned flow 2 and view pond 1 that the rainwater after filtering through water inlet regulating reservoir 6 tops is carried out advanced treating; Filter wall 15 through the right side at last and import in the collection joint ponds 7, change reservoir over to or send face of land utilization back to through submersible pump 8; Put into the into bottom of water regulating reservoir 6 with the rainwater after coagulating sedimentation, filtration and ultraviolet sterilization are handled that spring, summer, Qiu Sanji collect winter; Filter wall 14 through a left side then and inject lower floor's horizontal drowned flow 4; The rainwater that utilizes the efficient engineering microbial inoculum in lower floor's horizontal drowned flow 4 to pass through after filter water inlet regulating reservoir 6 bottoms carries out advanced treating; Import in the collection joint ponds 7 through right side filtration wall 15 at last, going underground through submersible pump 8 is incubated reservoir or sends face of land utilization back to.
Insulation effect is played to bottom, lower floor's horizontal drowned flow 4 and collecting-tank 7 middle parts and the top of water inlet regulating reservoir 6 in water inlet regulating reservoir 6 tops, view pond 1, upper strata horizontal drowned flow 2, carrier ring 3 and collecting-tank 7 tops of the double-deck drowned flow artificial wet land landscape pond of this embodiment utilization, guarantees can normally move in the winter time.
The left side of the double-deck drowned flow artificial wet land landscape pond of this embodiment is filtered wall 14 and is filtered wall 15 because the influence of efficient engineering microbial inoculum can be adhered to one deck biomembrane with right, increases filter effect.
This embodiment is a method of utilizing double-deck drowned flow artificial wet land landscape pond recycling Urban roof rainwater, and this method not only can have been saved the urban green space through being used for the support to the view in view pond to polluting after lower rainwater is handled; The maintenance cost of water landscape; But also can the water in the collection joint pond be used to water spill, the various aspects of lives such as carwash, water for fire, in storm period, through moving upper strata horizontal drowned flow and lower floor's horizontal drowned flow simultaneously; Alleviate the pressure of heavy rain to urban sewerage and drainage system; As a kind of prevention waterlogging system of integral body, can also the rainwater that gently pollutes be recycled simultaneously, reduce cost of water treatment; And can realize continuing throughout the year to carry out the purification and the processing requirements of rainwater.Rainwater at rainfall initial stage COD near 80～120mg/L; SS is in 70mg/L～90mg/L scope, and TP is near 0.4mg/L, through behind the initial stage runoff; Rainwater water quality improves; Rainfall later stage COD is 20mg/L～18mg/L, and SS is 10mg/L～8mg/L, after the processing of this embodiment in the reservoir COD value of water be 14mg/L; Suspension 4mg/L, water quality reach " building with sub-district rainwater utilization engineering legislation " (GB50400-2006) with " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) in the regenerated water water quality requirement.
Claims (8)
1. double-deck drowned flow artificial wet land landscape pond; It is characterized in that double-deck drowned flow artificial wet land landscape pond is filtered wall (14), rightly filtered wall (15) and metallic grid (16) is formed by view pond (1), upper strata horizontal drowned flow (2), carrier ring (3), lower floor's horizontal drowned flow (4), ground layer (5), water inlet regulating reservoir (6), collection joint pond (7), submersible pump (8), circulating water pipe (9), tapping pipe (10), left water proof valve (12), right water proof valve (13), a left side; View pond (1) is arranged on upper strata horizontal drowned flow (2) top; Upper strata horizontal drowned flow (2) is laid on carrier ring (3) top; Be provided with lower floor's horizontal drowned flow (4) between carrier ring (3) and the ground layer (5); Side at view pond (1), upper strata horizontal drowned flow (2) and lower floor's horizontal drowned flow (4) is provided with into water regulating reservoir (6); And opposite side is provided with collection joint pond (7); Adopt a left side to filter wall (14) regulating reservoir (6) of will intake and separate, and water inlet regulating reservoir (6) is divided into two parts up and down by carrier ring (3) and left water proof valve (12), adopt right filtration wall (15) to collect to save pond (7) and view pond (1), upper strata horizontal drowned flow (2) and lower floor's horizontal drowned flow (4) separate with view pond (1), upper strata horizontal drowned flow (2) and lower floor's horizontal drowned flow (4); And collection joint pond (7) is divided into three parts in upper, middle and lower by carrier ring (3), right water proof valve (13) and metallic grid (16); On the ground layer (5) of collection joint bottom, pond (7), submersible pump (8) is set, tapping pipe (10) is set on the bottom side ground layer (5), submersible pump (8) is connected with view pond (1) through circulating water pipe (9).
2. double-deck drowned flow artificial wet land landscape pond according to claim 1 is characterized in that described ground layer (5) divides the floating layer of cement mortar (5-1), waterproofing course (5-2), cement mortar screeding layer (5-3), reinforced concrete floor (5-4), C 15 layer of concrete (5-5), grey soil layer (5-6) and rammed earth layer (5-7) are arranged from top to bottom.
3. double-deck drowned flow artificial wet land landscape pond according to claim 2 is characterized in that the last device of described circulating water pipe (9) and tapping pipe (10) has anti-hydrofoil ring (11).
4. utilize the method for the described double-deck drowned flow artificial wet land landscape pond recycling of claim 1 Urban roof rainwater, it is characterized in that the method for recycling the Urban roof rainwater specifically accomplishes according to the following steps: one, collect rainwater; Two, coagulating sedimentation; Three, filter; Four, ultraviolet-sterilization; Five, inject the described double-deck drowned flow artificial wet land landscape pond of claim 1 and carry out advanced treating; Six, the rainwater after the processing is subsequent use.
5. the method for the double-deck drowned flow artificial wet land landscape pond recycling of utilization according to claim 4 Urban roof rainwater; It is characterized in that described coagulating sedimentation is that rainwater is injected the high density sedimentation basin; Add aluminium polychloride and polyacrylamide coagulation; The addition of aluminium polychloride is 10mg/L～20mg/L, and the addition of polyacrylamide is that 1mg/L～5mg/L, hydraulic detention time are 10min～30min.
6. the method for the double-deck drowned flow artificial wet land landscape pond recycling of utilization according to claim 5 Urban roof rainwater; It is characterized in that described filtration is that rainwater is injected V-type filter tank through the drainage pump; The filtering velocity in V-type filter tank is 4～15m/h, and gas is 130L/s.m towards intensity
2～160L/s.m
2
7. the method for the double-deck drowned flow artificial wet land landscape pond recycling of utilization according to claim 6 Urban roof rainwater, the uitraviolet intensity that it is characterized in that described ultraviolet sterilization is 150uW/cm
2～250uW/cm
2, sterilizing time is 30min～50min.
8. recycle the method for Urban roof rainwater according to claim 4,5, the double-deck drowned flow artificial wet land landscape pond of 6 or 7 described utilizations; It is characterized in that injecting in the step 5 the described double-deck drowned flow artificial wet land landscape pond of claim 1 and carry out advanced treating; Specifically be to carry out according to the following steps: when spring, summer, Qiu Sanji; After rainwater is collected; After coagulating sedimentation, filtration and ultraviolet sterilization are handled, feed in the double-deck drowned flow artificial wet land landscape pond; Filter out particle diameter >=1mm solid particle through water inlet regulating reservoir (6) top, filter wall (14) through a left side then and inject upper strata horizontal drowned flow (2), utilize the compound action of upper strata horizontal drowned flow (2) and view pond (1) that the rainwater after filtering through water inlet regulating reservoir (6) top is carried out advanced treating; Filter wall (15) through the right side at last and import in the collection joint pond (7), change reservoir over to or send face of land utilization back to through submersible pump (8); Put into the into bottom of water regulating reservoir (6) with the rainwater after coagulating sedimentation, filtration and ultraviolet sterilization are handled that spring, summer, Qiu Sanji collect winter; Filter wall (14) through a left side then and inject lower floor's horizontal drowned flow (4); The rainwater that utilizes the efficient engineering microbial inoculum in lower floor's horizontal drowned flow (4) to pass through after filter water inlet regulating reservoir (6) bottom carries out advanced treating; Import in the collection joint pond (7) through right side filtration wall (15) at last, going underground through submersible pump (8) is incubated reservoir or sends face of land utilization back to.
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