CN101955297B - Landscape type composite artificial wetland treatment device for eutrophic water body and application - Google Patents
Landscape type composite artificial wetland treatment device for eutrophic water body and application Download PDFInfo
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- CN101955297B CN101955297B CN2010102552198A CN201010255219A CN101955297B CN 101955297 B CN101955297 B CN 101955297B CN 2010102552198 A CN2010102552198 A CN 2010102552198A CN 201010255219 A CN201010255219 A CN 201010255219A CN 101955297 B CN101955297 B CN 101955297B
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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
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a landscape type composite artificial wetland treatment device for eutrophic water and application thereof. The composite artificial wetland combines the advantages of the surface flow artificial wetland and the horizontal subsurface flow artificial wetland, and the purpose of constructing wetland landscape is taken into consideration while the engineering treatment effect is ensured according to the different dissolved oxygen environments of the surface flow artificial wetland and the horizontal subsurface flow artificial wetland when treating eutrophic water, so that the composite artificial wetland has the advantages of small occupied area, high treatment efficiency, low construction cost, difficult blockage, good operation stability, good landscape effect and the like, and is easy to popularize and apply.
Description
Technical field
The present invention relates to the technical field that combined artificial wetland is disposed of sewage, be specifically related to a kind of landscape type combined artificial wetland treatment unit and application of eutrophication water.
Background technology
Artificial swamp is a kind of novel sewage disposal technology that grows up from the seventies in 20th century, and through the development of decades, this technology has obtained using widely gradually at aspects such as handling sewage, surface water, pollution of area source.It mainly is to utilize the comprehensive action of wetland plant, mikrobe and soil (or filler) to remove pollutants in sewage, has simple structure, processing costs is low and has advantage such as landscape effect.
Artificial swamp mainly is divided into surface current artificial wetland and drowned flow artificial wet land according to the fluidised form of disposing of sewage.Wherein, current wetland comprises horizontal drowned flow artificial wet land and vertical subsurface flow wetland again.Though all kinds artificial swamp respectively has advantage, also all come with some shortcomings, exist such as the surface current artificial wetland to be prone to grow mosquitos and flies, the not high shortcoming of limited, the nitrated ability of soil removability; There is the shortcoming that is prone to obstruction, nitrated ability in horizontal drowned flow artificial wet land; There is the shortcoming that is prone to obstruction, construction cost height and management maintenance complicacy in vertical subsurface flow wetland.
For overcoming the deficiency of single type wetland, present engineering research has the trend that dissimilar wetlands are combined and dispose of sewage with using.One Chinese patent application 200510047134.X; A kind of landscape type composite under-current artificial wetland sewage treatment method; Chinese patent ZL200510047935.6; A kind of compound flow constructed wetland and application system thereof, Chinese patent ZL200610036318.0, the method for vertical current and horizontal flow integrated composite artificial wetland Treating Municipal Sewage etc. all is that vertical subsurface flow and horizontal drowned flow artificial wet land are combined with placed in-line mode; Utilize aerobics different in two kinds of artificial swamps and anaerobic environment to remove pollutents such as organism and nitrogen phosphorus, what have also strengthens to strengthen removing the effect of nitrogen phosphorus matrix in addition.Chinese patent ZL200510011497.8 for another example; Vertical current-surface current combined artificial wetland is handled the sewage method; Be that vertical current constructed wetland and surface current artificial wetland are combined into composite system processing sewage; In vertical current constructed wetland, plant ornamental plant, planting aquatic plants, flowers, vegetables or cultured fishes in the surface current artificial wetland.
Above wetland combination process mainly is to be used to handle the higher sewage of organic content such as sewage, municipal effluent, and utilizes the correlative study of artificial swamp combination process processing enriched surface water body (like lake, river course, reservoir etc.) less.
Development along with society; Increasing lake, river course, reservoir are because contain the sewage of a large amount of nitrogen, phosphor contaminant and entering of early-stage rainwater; Make water body become eutrophication water gradually; Cause the water landscape weak effect, be prone to blue-green algae " wawter bloom " is taken place, the existence to aquatic animals and plants in the lake has simultaneously also caused serious threat.Traditional purifying eutrophication water body mode is that diversion is changed water, adds chemistry or microbial reagent, utilized oxygenation facility or equipment that water body is forced oxygenation etc.Wherein, diversion is changed the water measure and is needed abundance, cleans the water source as changing the water water source easily, and there are shortcomings such as the water conditioning degree is poor, pollution transportation in this kind mode simultaneously; Add that chemistry or microbial reagent exist that fund input is big, water quality is prone to repeatedly, secondary pollution problems is arranged; Force the aeration measure to exist energy consumption big, the high deficiency of processing costs.
In addition, compare with natural wetland, artificial swamp is because the needs of processing intent; Structures all adopt the mode of through engineering approaches to build; Especially when some utilize the artificial swamp processing to have the surface water body of view requirement, how to improve the artificial swamp view, reduce the vestige of manual workization as far as possible; To coordinate mutually, also be the problem that the artificial swamp construction should be considered with surrounding landscape.
Summary of the invention
To the deficiency that exists in the prior art; One object of the present invention has been to provide a kind of landscape type combined artificial wetland treatment unit of eutrophication water; This goal of the invention realizes through following technical proposals: a kind of landscape type combined artificial wetland treatment unit of eutrophication water; Comprise and the outside isolated sealing wetland body of wall; Be provided with in the wetland body of wall water collecting basin, water inlet distributing flue, surface current artificial wetland and under horizontal drowned flow artificial wet land, middle mixing pit; Wherein, between water inlet distributing flue and the surface current artificial wetland, be equipped with partition wall between combined artificial wetland (integral body that geotechnological layer of cloth between surface current artificial wetland, two wetland units and horizontal drowned flow artificial wet land unit are formed) and middle mixing pit, the water collecting basin.The wetland body of wall adopts cemented rock or brick wall, and partition wall adopts brick wall or reinforced concrete wall, and the water inlet distributing flue adopts reinforced concrete structure.The Inlet and outlet water of combined artificial wetland treatment unit passes the wetland body of wall by pipeline and realizes.Thickness was not less than 400mm when wherein, the wetland body of wall adopted cemented rock, thickness is not less than 370mm when adopting brick wall; Thickness was not less than 240mm when partition wall adopted brick wall, thickness is not less than 150mm when adopting reinforced concrete wall; Water inlet distributing flue partition wall and base plate thickness are 80～100mm.In addition, do not pass through the body of wall side leakage for guaranteeing the sewage that apparatus of the present invention are handled, brick wall adopts the cement sand plaster of thickness 15～20mm, and cemented rock adopts pointing with cement mortar in 1: 2; The entire treatment structure base need not done special antiseepage and handle, and adopts clay or undisturbed soil compacting, guarantees that PQ is not more than 10
-6Cm/s gets final product.
The integral planar size of combined artificial wetland treatment unit of the present invention can be not less than 2: 1 in the wetland long-width ratio according to the land use situation flexible design, wetland length is no more than under the situation of 100m, can not need lattice.
The formant constructional feature of apparatus of the present invention is following:
Surface current artificial wetland unit: form by waterplant and plant growing layer from top to bottom on the structure.Wherein waterplant is main with emergent and submerged plant, plants the part floatingleaved plant again; Wherein, emergent is lotus, calamus, a kind of or arbitrary combination in power flower, iris and the aquatic Canna generalis Bailey again; Submerged plant is a kind of or arbitrary combination in eel grass, water caltrop, waterweed and the p.malaianus; Floatingleaved plant is a kind of or arbitrary combination in water lily and the floating heart.The plant growing layer divides two-layer up and down, and the upper strata is a clay seam, lower floor be fine sand layer (fine sand layer fineness modulus 2.2～1.6, select for use III class natural sand or artificial sand all can).In addition, water inlet place of surface current wetland unit is provided with into that the water distributing flue carries out water distribution, make whole wetland bed can load evenly; The effluent adopting overflow weir water outlet of surface current artificial wetland unit can reduce the generation of its short flow phenomenon.The surface current artificial wetland unit of apparatus of the present invention is compared with conventional surface current artificial wetland unit, and structure is basic identical, and the key distinction is that the surface current artificial wetland plants in the selection of plant, mainly selects the good waterplant of appreciation effect.In addition; For getting into subsequent horizontal drowned flow artificial wet land unit, bulk suspended substances such as the plant residue that prevents to pile up in surface current wetland when operation water (plant residue that the surface current wetland is not removed and periphery descend slowly and lightly fallen leaves in the wetland into etc.) result in blockage; Before surface current wetland end water outlet overflow weir, be provided with Stainless Steel Cloth (grid mesh 10～30mm), and the grid slag of when operation, piling up before the regularly artificial removing grid.
Middle mixing pit: middle mixing pit is arranged on the surface current artificial wetland water side; Identical with the total height of combined artificial wetland treatment unit of the present invention; It is provided with purpose mainly is that the water outlet of surface current artificial wetland unit is mixed, and makes the water outlet of surface current artificial wetland unit further even.
Horizontal drowned flow artificial wet land unit: all fill, compare, do not have planting aquatic plants on the bed body, but confirm still have purifying water effect preferably according to correlation engineering report and contriver's test with the conventional horizontal drowned flow artificial wet land by gravel bed.
Water collecting basin: water collecting basin is arranged on the horizontal drowned flow artificial wet land water side; Water collecting basin is identical with the total height of combined artificial wetland treatment unit of the present invention; It is provided with purpose mainly is that water outlet is collected to horizontal drowned flow artificial wet land, makes the system's effluent quality and the water yield keep stable.
Another object of the present invention has been to provide a kind of application of landscape type combined artificial wetland treatment unit of eutrophication water, and the treatment scheme of this application is following:
Eutrophication sewage extracts through water pump or the system's water inlet pipe of flowing through certainly gets into the water inlet distributing flue; Behind water inlet distributing flue water distribution uniformity, get into the surface current artificial wetland unit; After the rough purification of surface current artificial wetland unit; Mixing pit in the middle of sewage imports is through the water inlet rectification hole inflow horizontal drowned flow artificial wet land unit of wetland and middle mixing pit partition wall bottom, after the horizontal drowned flow artificial wet land unit further purifies; Sewage flows into water collecting basin through the water outlet rectification hole of wetland and water collecting basin partition wall bottom, is discharged by the operation rising pipe through water collecting basin.
Advantage of the present invention and beneficial effect are:
1, to make that surface current artificial wetland and horizontal drowned flow artificial wet land have carried out on a plane base vertical compound for the constructional feature of apparatus of the present invention, then gets into lower floor's horizontal drowned flow artificial wet land after pending sewage is handled through upper surface person who lives in exile worker wetland purification earlier and carry out purifying treatment.Because the filteration of the terminal Stainless Steel Cloth that is provided with of the water purification effect of upper surface person who lives in exile worker wetland and surface current wetland, slow down with the probability that has effectively prevented to take place in lower floor's gravel bed water purification process to stop up greatly, guarantee that the total system long-term stability moves efficiently.In addition, the combined artificial wetland treatment unit of taking this kind mode to form, with carry out placed in-line surface current artificial wetland in the horizontal direction, the horizontal drowned flow artificial wet land process combination is compared, take up an area of greatly to save; With slow down or prevent that the process combination that the drowned flow artificial wet land operation is stopped up from comparing through increasing water inlet pre-treatment intensity, investment is obviously saved and convenient management;
2, apparatus of the present invention compact construction, laid down cost is low, hydraulic load is high, operation stability is strong, efficiently solves the wet land system blockage problem, can improve the wetland steady running time limit, has reduced the secondary pollution problem simultaneously, and is little to surrounding environment influence;
3, in vertical direction compound of two types wetland effectively reduces the project occupation of land area, saved the engineering construction cost;
4, combined artificial wetland treatment unit of the present invention adopts full underground type; Reduced artificialization vestige; Simultaneously, surface current artificial wetland's structure has been built multifarious muskeg view, has improved the Harmony of this combined artificial wetland treatment unit and surrounding landscape;
5, the horizontal drowned flow artificial wet land in the combined artificial wetland treatment unit of the present invention since sewage on the face of land with current downflow, good heat preservation performance has reduced the influence of weather to the wetland treatment effect;
6, combined artificial wetland of the present invention also can be used for purifying sewage and the trade effluent with certain pre-treatment measure.
Description of drawings
Fig. 1 is the floor map of the landscape type combined artificial wetland treatment unit of a kind of eutrophication water in the embodiment of the present invention.
Fig. 2 is the diagrammatic cross-section on the landscape type combined artificial wetland treatment unit WWT direction of a kind of eutrophication water of the present invention.
Fig. 3 is wetland and the diagrammatic cross-section of middle mixing pit partition wall perforate in apparatus of the present invention.
Description of reference numerals is following: 1-system water inlet pipe; The 2-distributing flue of intaking; 3-water inlet distributing flue and surface current artificial wetland's partition wall; The 4-distributing hole; The 5-waterplant; 6-surface current artificial wetland water outlet Stainless Steel Cloth; 7-wetland and middle mixing pit partition wall; 8-surface current artificial wetland water outlet overflow weir; Mixing pit in the middle of the 9-; Mixing pit cover plate in the middle of the 10-; 11-wetland body of wall; Mixing pit gravel bed in the middle of the 12-; The 13-rectification hole of intaking; The 14-clay seam; The 15-fine sand layer; 16-geotechnique layer of cloth; 17-horizontal drowned flow artificial wet land gravel bed; 18-wetland and water collecting basin partition wall; 19-water outlet rectification hole; The 20-water collecting basin; 21-water collecting basin gravel bed; 22-water collecting basin cover plate; 23-moves rising pipe; The 24-blow-down pipe.
Embodiment
Introduce composition structure, the principle of work and methods for using them of apparatus of the present invention in detail below in conjunction with accompanying drawing.
The landscape type combined artificial wetland treatment unit of a kind of eutrophication water of the present invention is built pending river course, lake or reservoir bank in, and treating water is the water body of eutrophication.Apparatus of the present invention have made full use of surface current and horizontal drowned flow artificial wet land advantage separately, in the purifying treatment eutrophication water, the wetland surrounding landscape have also been played the effect that promotes.
As shown in Figure 1; A kind of landscape type combined artificial wetland treatment unit of eutrophication water; Comprise wetland body of wall 11 with the isolated sealing in the outside; Wetland body of wall 11 end faces are than the high 0.2m of surrounding ground, be provided with in the wetland body of wall 11 water collecting basin 20, water inlet distributing flue 2, surface current artificial wetland and under horizontal drowned flow artificial wet land and middle mixing pit 9, wherein; Between water inlet distributing flue 2 and the surface current artificial wetland, be equipped with partition wall between combined artificial wetland (integral body that geotechnological layer of cloth 16 between surface current artificial wetland, two wetland units and horizontal drowned flow artificial wet land unit are formed) and middle mixing pit 9, the water collecting basin 20.In addition, at surface current artificial wetland's end, also be provided with surface current artificial wetland's water outlet Stainless Steel Cloth 6 before surface current artificial wetland's water outlet overflow weir 8.
The Inlet and outlet water of combined artificial wetland treatment unit of the present invention (system's water inlet pipe 1, operation rising pipe 23 and blow-down pipe 24) passes wetland body of wall 11 by pipeline and realizes, the area sum of surface current artificial wetland unit, water inlet distributing flue 2 is identical with the unitary area of horizontal drowned flow artificial wet land.
Described geotechnological layer of cloth 16 is laid two-layer, geotextile antiseepage coefficient≤1.0 * 10
-10Cm/s, individual layer geotextile thickness 1～3mm.
Described surface current artificial wetland's water outlet Stainless Steel Cloth 6 meshes 10～30mm; Utilize timber to be fixed on surface current artificial wetland's plant growing layer; Timber spacing 8～15m, the height of Stainless Steel Cloth are not less than surface current artificial wetland's plant growing layer and depth of water sum.
For reaching all uniform purposes of ability water distribution of surface current and horizontal drowned flow artificial wet land unit, the unitary water-in and water-out of surface current artificial wetland and horizontal drowned flow artificial wet land are equipped with water distribution, rectification facilities.
Like Fig. 2; Apparatus of the present invention are from looking up with the vertical side that disposes of sewage; Beginning from system's water inlet, is wetland body of wall 11, water collecting basin 20, wetland and water collecting basin partition wall 18, the water inlet distributing flue 2 of an end, the wetland body of wall 11 of vertical compound surface current and horizontal drowned flow artificial wet land, wetland and middle mixing pit partition wall 7, middle mixing pit 9 and the other end up and down in the horizontal direction successively.
Following in conjunction with Fig. 2 and the whole from inlet water to outlet water flow process of sewage that is processed: at first to the concrete structure and the position relationship description of above various piece; System's water inlet pipe 1 passes wetland body of wall 11; Water collecting basin 20 is introduced pending eutrophication sewage the water inlet distributing flue 2 that is arranged on surface current artificial wetland's unit water inlet place with wetland and water collecting basin partition wall 18; Pending sewage is through water inlet distributing flue 2; (aperture 40～80mm, adjacent two hole between centers 0.8～1.2m) flow into the surface current artificial wetland unit to distributing hole 4 through water inlet distributing flue and surface current artificial wetland's partition wall 3 bottoms again.(planting aquatic plants has lotus, water lily, eel grass and water caltrop, and planting density is respectively 2～6 strains/10m by waterplant 5 in the surface current artificial wetland unit
2, 1～4 strain/10m
2, 10～30 strains/m
2With 10～30 strains/m
2) and the plant growing layer (the plant growing layer divides two-layer up and down, and the upper strata is a clay seam 14, height 0.2～0.5m; Lower floor is a fine sand layer 15, height 0.1～0.3m, fineness modulus 2.2～1.6; Select III class artificial sand for use) form; This unit plant growing layer height 0.3～0.8m, the depth of water 0.4～0.5m should guarantee that simultaneously surface current wetland unit wetland body of wall wall top water surface superelevation (the wall top specific surface stream wetland water surface is high) is not less than 0.3m.All (height 0.6～1.0m, particle diameter are 15～25mm) fillings by horizontal drowned flow artificial wet land gravel bed 17 in the horizontal drowned flow artificial wet land unit.Combined artificial wetland (integral body that geotechnological layer of cloth 16 between surface current artificial wetland, two wetland units and horizontal drowned flow artificial wet land unit are formed) wetland body of wall total height is controlled at 1.5～2.5m.
In order to guarantee the operation of surface current artificial wetland and horizontal drowned flow artificial wet land units in series; Except being provided with in water inlet place into the water distributing flue 2; Mixing pit 9 in the middle of surface current artificial wetland's unit water outlet place also is provided with; Horizontal drowned flow artificial wet land water outlet place is provided with water collecting basin 20; (adjacent two hole between centers 0.8～1.2m) flow into middle mixing pit 9 to surface current artificial wetland's water outlet spillway hole 8 of sewage through wetland and middle mixing pit partition wall 7 upper ends of handling through the surface current artificial wetland for square hole, size 120 * 120mm.The above height (being the surface current artificial wetland unit plant growing depth of water and the high sum of wall toplap) of water inlet distributing flue 2 and the unitary plant growing layer of surface current artificial wetland is identical, and middle mixing pit 9, water collecting basin 20 wall heights of roofs are answered specific surface to flow wetland water surface height and are not less than 0.3m.The top of mixing pit 9 and water collecting basin 20 all is added with cover plate simultaneously; Mixing pit cover plate 10 and water collecting basin cover plate 22 in the middle of being respectively, mixing pit gravel bed 12 in the middle of laying respectively at the bottom of the pond (height 0.6～1.0m, particle diameter 25～50mm) and water collecting basin gravel bed 21 (height 0.6～1.0m; Particle diameter 25～50mm); Sewage is after middle mixing pit 9 is further handled, through water inlet rectification hole 13 (square hole, the size 240 * 240mm of wetland and middle mixing pit partition wall 7 lower ends; Adjacent two hole between centers 1.6～2.4m) flow into horizontal drowned flow artificial wet land gravel bed 17; And then water outlet rectification hole 19 (square hole, size 240 * 240mm, adjacent two hole between centers, 1.6～2.4m) inflow water collecting basins 20 through being arranged on wetland and water collecting basin partition wall 18 lower ends; After the water collecting basin gravel bed 21 of water collecting basin 20 bottoms purifies, the water discharge device after will handling through the operation rising pipe 23 that is connected with water collecting basin 20 at last.
In above technical scheme, except that distributing hole 4 was pre-buried plastics circular hole water distribution, other overflows and rectification hole were the square opening of reserving in the body of wall.Water inlet distributing flue and surface current artificial wetland's partition wall are 3 identical with water collecting basin partition wall 18 length with wetland, wetland and middle mixing pit partition wall 7 length are not less than the into length of water distributing flue 2.Distributing hole 4, water inlet rectification hole 13, water outlet rectification hole 19 perforate quantity confirm according to the length of partition wall, on surface current artificial wetland's partition wall 3, wetland and water collecting basin partition wall 18 and wetland and middle mixing pit partition wall 7 with the full section perforate of current vertical direction.The perforate relation of wetland and middle mixing pit partition wall 7, surface current artificial wetland's water outlet overflow weir 8 and water inlet rectification hole 13 is shown in accompanying drawing 3, and the adjacent two hole between centers of surface current artificial wetland's water outlet overflow weir 8 are half the for the adjacent two hole between centers of water inlet rectification hole 13.Water inlet rectification hole 13 is identical with water outlet rectification hole 19 bore size and remain on sustained height.
Inlet and outlet water in apparatus of the present invention all adopts pipeline: system's water inlet pipe 1 (caliber DN100～DN200; The PVC-U pipe; Pipe end absolute altitude is higher than into that water distributing flue 2 water surface absolute altitudes are not less than 0.1m, passes wetland body of wall 11, water collecting basin 20 and wetland and gets into the distributing flues 2 of intaking with water collecting basin partition wall 18; Rising pipe has operation rising pipe 23 (pipe end absolute altitude is lower than water collecting basin water surface absolute altitude and is not more than 0.3m for caliber DN200～DN300, PVC-U pipe) and blow-down pipe 24 (pipelining is at the bottom of water collecting basin for caliber DN300～DN500, PVC-U pipe).Wherein, the rising pipe when operation rising pipe 23 normally moves for combined artificial wetland of the present invention, 24 of blow-down pipes are opened when Maintenance and Repair, and operation rising pipe 23 all passes wetland body of wall 11 with blow-down pipe 24 and links to each other with water collecting basin 20.
When combined artificial wetland treatment unit of the present invention moves; The sewage of eutrophication is intake distributing flue 2 (as if conditions permit by submersible pump through 1 suction of system's water inlet pipe; Also can make pending water body from flowing into into water distributing flue 2), behind distributing hole 4 water distribution uniformities, get into the surface current artificial wetland unit.Because the comprehensive action of unitary plant growing layer of surface current artificial wetland and waterplant 5, the suspended substance major part in the sewage is trapped, adsorbs; Simultaneously, because the surface current artificial wetland has reoxygenation ability preferably, a part of organism is absorbed by mikrobe and root system of plant, and by mikrobe and plant absorbing, a part then is removed through the nitrification and denitrification effect as nutritive substance for a part of N, P.Mixing pit 9 in the middle of sewage after the rough purification of surface current artificial wetland unit flows into through surface current artificial wetland's water outlet overflow weir 8 flows into the horizontal drowned flow artificial wet land unit by middle mixing pit gravel bed 12 through water inlet rectification hole 13.Behind the system stability; 17 surface growths of horizontal drowned flow artificial wet land gravel bed a large amount of mikrobes, and formed microbial film, solid substance is stopped by gravel filling and holding back; Thereby organism is further removed by the microbial film absorption degradation, and the N in the sewage, P also further purify owing to action of microorganisms.Sewage behind the horizontal drowned flow artificial wet land purification unit flows into water collecting basin 20 by water outlet rectification hole 19, behind water collecting basin gravel bed 21, is discharged by operation rising pipe 23.
Apparatus of the present invention are applied to city, Wuhan City one eutrophic lake purification of water quality treatment project, day processing water yield 3000m
3Its plat is seen Fig. 1.
Design variable:
Floor space: 2960m
2(wetland is formed by the original lotus pond transformation of ait; Be shaped as irregular crescent); Divide two-layer up and down, lattice not, wetland body of wall 11 is the cemented rock structure; Water inlet distributing flue 2 and surface current artificial wetland's partition wall 3, wetland and middle mixing pit partition wall 7 and wetland and water collecting basin partition wall 18 all adopt the brick structure finishing cement, and water inlet distributing flue 2 is a reinforced concrete structure.
Water inlet distributing flue 2: channel clear span 300mm, depth of water 0.3m, the diameter 40～80mm of distributing hole 4, the long 40m of water inlet distributing flue, distributing hole 4 is provided with 39, all is located at the into bottom of water distributing flue 2, and equidistance is arranged, and the hole between centers of adjacent distributing hole is 1m.
The surface current artificial wetland unit: total depth 1.1m, wherein, depth of water 0.4m; Pond body water surface superelevation 0.3m; Clay seam 14, fine sand layer 15 thickness are respectively 300mm, 100mm, and the waterplant 5 of plantation has lotus, water lily, eel grass and water caltrop, and planting density is respectively 3 strains/10m
2, 2 strains/10m
2, 15 strains/m
2, 15 strains/m
2Surface current artificial wetland's water outlet overflow weir 8 adopts square hole, size 120 * 120mm, adjacent two hole between centers 1000mm.
Surface current artificial wetland's water outlet Stainless Steel Cloth 6: its two ends link to each other with wetland body of wall 11, and mesh 15mm utilizes four timbers to be fixed on surface current artificial wetland's clay seam 14 bottoms, and it is 1.0m highly, and long is 45m.
Geotechnique's layer of cloth 16: geotechnological layer of cloth is laid two-layer, geotextile antiseepage coefficient≤1.0 * 10
-10Cm/s, thickness in monolayer 1～3mm.
Middle mixing pit 9: total depth 1.9m, clear span 800mm, the middle mixing pit cover plate 10 of adding a cover on the top is the plastics grid plate, middle mixing pit gravel bed 12 thickness that lay the bottom are 800mm, particle diameter 25～50mm.
The horizontal drowned flow artificial wet land unit: total depth 0.8m, horizontal drowned flow artificial wet land gravel bed 17 thick 800mm, the gravel particle diameter is 15～25mm.The water inlet rectification hole 13 and the water outlet rectification hole 19 of horizontal drowned flow artificial wet land are square hole, and size is 240 * 240mm, and adjacent two hole between centers are 2000mm.
Water collecting basin 20: total depth 1.9m, clear span 800mm, the water collecting basin cover plate 22 of adding a cover on the top is the plastics grid plate, the thickness of the water collecting basin gravel bed 21 that lay the bottom is 800mm, particle diameter 25～50mm.
Inlet and outlet pipe lines: all adopt the PVC-U pipe, system's water inlet pipe 1 is that DN100, operation rising pipe 23 are DN300 for DN200, blow-down pipe 24.
Operation scheme: operation continuously, hydraulic detention time is 23h.
This combined artificial wetland treatment unit operation is after 2 years, and treatment effect is as shown in table 1.
Table 1 combined artificial wetland treatment unit water quality operation conditions contrast table (annual)
| Water quality | pH | COD cr | COD Mn | BOD 5 | NH 3-N | TN | TP | SS |
| Water inlet | 8.1 | 85.0 | 20.3 | 7.9 | 3.5 | 5.9 | 0.41 | 43.0 |
| Water outlet | 8.0 | 29.3 | 6.5 | 3.8 | 1.8 | 2.0 | 0.19 | 4.0 |
On this lake center island, also have place's side direction horizontal drowned flow artificial wet land in addition, this wetland and combined artificial wetland device of the present invention parallel running, day processing water yield is identical, is 3000m
3/ d, this wetland main technical details is:
Floor space 2100m
2(being shaped as irregular fan-shaped) divided 3 lattice parallel runnings, and every lattice plantation plant is respectively Canna generalis Bailey, power is spent and cattail again.Filler is a gravel, total thickness 700mm.
This side direction horizontal drowned flow artificial wet land steady running is after 2 years, and its annual water-in and water-out water quality and combined artificial wetland of the present invention contrast situation are as shown in table 2.
Table 2 combined artificial wetland of the present invention and side direction drowned flow artificial wet land Inlet and outlet water water quality contrast table look-up
And; Operation is after 2 years continuously; The initial high 0.12m of harmony of side direction drowned flow artificial wet land water-in water level (account for the water-in depth of water 15%); The water outlet flow reduces 10% more at first, the high 0.03m of combined artificial wetland treatment unit water-in water level harmony of the present invention (account for the water-in depth of water 4%), and the water outlet flow increases by 10% more at first.Explain that operation is after 2 years continuously, latch up phenomenon has to a certain degree appearred in side direction drowned flow artificial wet land, and combined artificial wetland treatment unit of the present invention is still as before unobstructed, does not have the sign of obstruction.
Claims (10)
1. the landscape type combined artificial wetland treatment unit of an eutrophication water; It is characterized in that: comprise wetland body of wall (11) with the isolated sealing in the outside; Be located at water collecting basin (20) in the wetland body of wall (11), water inlet distributing flue (2), superpose placed in-line surface current artificial wetland and horizontal drowned flow artificial wet land, middle mixing pit (9) and the inlet and outlet pipe lines that passes the wetland body of wall (11) of water collecting basin (20) one sides up and down;
Described inlet and outlet pipe lines has system's water inlet pipe (1), operation rising pipe (23) and blow-down pipe (24); Wherein system's water inlet pipe (1) passes wetland body of wall (11); Water collecting basin (20) links to each other with water inlet distributing flue (2) with water collecting basin partition wall (18) with wetland, and operation rising pipe (23) all passes wetland body of wall (11) with blow-down pipe (24) and links to each other with water collecting basin (20);
Link to each other with surface current artificial wetland's partition wall (3) through the water inlet distributing flue between described water inlet distributing flue (2) and the surface current artificial wetland;
Described superpose up and down placed in-line surface current artificial wetland and horizontal drowned flow artificial wet land whole with middle mixing pit (9), water collecting basin (20) between link to each other with water collecting basin partition wall (18) with middle mixing pit partition wall (7), wetland through wetland respectively;
Link to each other through geotechnological layer of cloth (16) between described surface current artificial wetland and the horizontal drowned flow artificial wet land.
2. the landscape type combined artificial wetland treatment unit of a kind of eutrophication water according to claim 1; It is characterized in that: described surface current artificial wetland is made up of waterplant (5) and plant growing layer; Waterplant (5) is main with emergent and submerged plant, plants the part floatingleaved plant again, and described plant growing layer divides two-layer up and down; The upper strata is clay seam (14), and lower floor is fine sand layer (15).
3. the landscape type combined artificial wetland treatment unit of a kind of eutrophication water according to claim 1 is characterized in that: mixing pit gravel bed (12) and water collecting basin gravel bed (21) in the middle of the bottom of mixing pit (9) and water collecting basin (20) is equipped with respectively in the middle of described.
4. the landscape type combined artificial wetland treatment unit of a kind of eutrophication water according to claim 1, it is characterized in that: described horizontal drowned flow artificial wet land is all filled by horizontal drowned flow artificial wet land gravel bed (17).
5. the landscape type combined artificial wetland treatment unit of a kind of eutrophication water according to claim 2 is characterized in that: described emergent is lotus, calamus, a kind of or arbitrary combination in power flower, iris and the aquatic Canna generalis Bailey again; Submerged plant is a kind of or arbitrary combination in eel grass, water caltrop, waterweed and the p.malaianus; Floatingleaved plant is a kind of in water lily and the floating heart.
6. according to the landscape type combined artificial wetland treatment unit of arbitrary described a kind of eutrophication water among the claim 1-5, it is characterized in that: described water inlet distributing flue and surface current artificial wetland's partition wall (3) bottom are provided with distributing hole (4).
7. according to the landscape type combined artificial wetland treatment unit of arbitrary described a kind of eutrophication water among the claim 1-5; It is characterized in that: the upper end of described wetland and middle mixing pit partition wall (7) is provided with surface current artificial wetland's water outlet overflow weir (8), and the surface current artificial wetland water outlet overflow weir (8) terminal described surface current artificial wetland is provided with surface current artificial wetland's water outlet Stainless Steel Cloth (6) before.
8. according to the landscape type combined artificial wetland treatment unit of arbitrary described a kind of eutrophication water among the claim 1-5, it is characterized in that: the bottom of described wetland and middle mixing pit partition wall (7) and wetland and water collecting basin partition wall (18) is respectively equipped with the water inlet rectification hole (13) and the water outlet rectification hole (19) of horizontal drowned flow artificial wet land.
9. according to the landscape type combined artificial wetland treatment unit of arbitrary described a kind of eutrophication water among the claim 1-5, it is characterized in that: described wetland body of wall (11) adopts cemented rock or brick wall;
Described water inlet distributing flue and surface current artificial wetland's partition wall (3), wetland and middle mixing pit partition wall (7) and wetland and water collecting basin partition wall (18) all adopt brick wall or reinforced concrete wall;
Described water inlet distributing flue (2) adopts reinforced concrete structure.
10. the application of the landscape type combined artificial wetland treatment unit of a kind of eutrophication water as claimed in claim 1 in handling eutrophication water.
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| CN102730837B (en) * | 2012-07-03 | 2013-08-07 | 刘树元 | Horizontal gathered flow type constructed wetland |
| CN103626297B (en) * | 2012-08-24 | 2016-01-20 | 上海太和水环境科技发展有限公司 | The collocation method of submerged vegetation in mixed type subsurface flow wetland system |
| CN103626296B (en) * | 2012-08-24 | 2015-08-26 | 上海太和水环境科技发展有限公司 | The collocation method of floatingleaved vegetation in mixed type subsurface flow wetland system |
| CN103043800B (en) * | 2012-12-28 | 2014-01-01 | 上海勘测设计研究院 | Composite surface flow wetland system |
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| CN104649419B (en) * | 2015-03-06 | 2016-08-17 | 武汉中科水生环境工程股份有限公司 | A kind of double horizontal drowned flow gas operated combined artificial wetland |
| CN104986862B (en) * | 2015-07-01 | 2017-02-22 | 武汉中科水生环境工程股份有限公司 | Surface flow and sub-surface flow integrated composite constructed wetland suitable for treatment of eutrophic water body |
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| CN107840457A (en) * | 2017-11-01 | 2018-03-27 | 同济大学 | A kind of combined type deep layer artificial wet land system and operation method |
| CN109809567A (en) * | 2017-11-22 | 2019-05-28 | 天瑞环境科技（仙桃）有限公司 | A kind of subsurface constructed wetland |
| CN109819852B (en) * | 2019-03-21 | 2021-06-04 | 中国水产科学研究院渔业机械仪器研究所 | Structure of Hui type lotus root field with pollution purification function |
| CN110130461A (en) * | 2019-05-29 | 2019-08-16 | 合肥亿境景观建筑设计有限公司 | A kind of rain of Landscape Forest, the compensation supply and drain water system of water |
| CN112352635A (en) * | 2020-11-25 | 2021-02-12 | 上海应用技术大学 | Submerged plant planting device |
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| JPH06182394A (en) * | 1992-12-22 | 1994-07-05 | Dam Suigenchi Kankyo Seibi Center | Purifying facility for water surface of inlet |
| JP4877546B2 (en) * | 2006-09-14 | 2012-02-15 | 独立行政法人農業・食品産業技術総合研究機構 | Underflow constructed wetland system |
| CN101481177A (en) * | 2009-01-15 | 2009-07-15 | 北京师范大学 | Surface flow-horizontal undercurrent composite manpower wetland system |
| CN101671092B (en) * | 2009-10-12 | 2011-05-18 | 中国农业大学 | Sewage treatment system and method for combined tidal flow artificial wetland |
| CN201770585U (en) * | 2010-08-13 | 2011-03-23 | 武汉中科水生环境工程有限公司 | Landscape type composite artificial wet land treatment device for eutrophication water bodies |
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