CN104649419A - Double-horizontal subsurface-flow gas-guided combined constructed wetland - Google Patents

Double-horizontal subsurface-flow gas-guided combined constructed wetland Download PDF

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Publication number
CN104649419A
CN104649419A CN201510099852.5A CN201510099852A CN104649419A CN 104649419 A CN104649419 A CN 104649419A CN 201510099852 A CN201510099852 A CN 201510099852A CN 104649419 A CN104649419 A CN 104649419A
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water
upper strata
constructed wetland
horizontal subsurface
layer
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CN104649419B (en
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刘志军
熊芨
王硕
王超
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Wuhan Zhongke Aquatic Ecological Environment Co ltd
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WUHAN ZHONGKE HYDROBIOLOGY ENVIRONMENT ENGINEERING Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/101—Sulfur compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

The invention discloses a double-horizontal subsurface-flow gas-guided combined constructed wetland. Two levels of horizontal subsurface-flow constructed wetland are combined in vertical space, and a gas guide pipe is planted in a lower wetland filler layer; the wetland comprises a water outlet collection tank, a water inlet collection tank, an upper-layer horizontal subsurface-flow constructed wetland unit, a lower-layer horizontal subsurface-flow constructed wetland unit, and a middle mixing tank. The two levels of horizontal subsurface-flow constructed wetland are combined in vertical space, so that the adsorption and filtering effects of the matrix can be fully utilized, the removal capacity of the wetland on various pollutants such as SS, N, P, COD, heavy metals and the like can be effectively promoted, the application range is wide, and the double-horizontal subsurface-flow gas-guided combined constructed wetland can be used for treating various waste water. The gas guide pipe is distributed along the water flow direction, water flow can enable air in the gas guide pipe to form negative pressure, so that external air is easily sucked compared with the conventional vertical gas guide pipe, the anoxic problem of the lower-layer wetland is effectively solved, and the treatment capacity of the lower-layer wetland on pollutants, especially ammonia nitrogen can be promoted.

Description

A kind of two horizontal drowned flow gas operated combined artificial wetland
Technical field
The present invention relates to Wastewater Treatment by Constructed Wetlands technical field, be specifically related to a kind of two horizontal drowned flow gas operated combined artificial wetland.
Technical background
Artificial Wetland Techniques originates from the seventies in last century, is grow up on the sewage disposal technology bases such as land treatment systems, stabilization pond, biological filter a kind of artificial constructed and the main sewage disposal technology utilizing natural detergent power controlled.Through years development, this technology has had in fields such as sanitary sewage disposal, pollution of area source control, water remediation to be applied widely.It is mainly purified waste water by the physics of wetland plant, soil, filler, microorganism, chemistry, biological triple synergy, and have structure simple, easy to maintenance, working cost is low, the advantage that landscape effect is good.
Artificial swamp can be divided into surface current artificial wetland, Horizontal subsurface constructed wetland and vertical current constructed wetland, the relative merits that three-type-person's work wetland is had nothing in common with each other, and in general, artificial swamp ubiquity easily blocks, the problem that project occupation of land area is large.Wherein, Wetland clogging problem solves by carrying out primary reinforcement process to sewage, at home many successful cases such as existing Shaoguan City of Guangdong Province second sewage work artificial swamp engineering, Fugang County of Guangdong Province exhibition poplar Engineering of Sewage Treatment Plant.And the problem in project occupation of land is never effectively solved, because artificial swamp unit surface sewage treating efficiency is limited, single one-level artificial wetland treatment is difficult to qualified discharge, among Practical Project, often need multistage artificial swamp to combine application, the multistage wetland series winding of horizontal direction, can strengthen project occupation of land area further; Although the series winding of vertical direction effectively can reduce floor space, because lower floor's wetland is in anaerobic environment, denitrification ability is more weak.
Therefore, for the deficiencies in the prior art part, provide a kind of denitrification effect good, unit surface sewage treating efficiency is high, and the combined artificial wetland that integrated engineering floor space is little is very necessary.
Summary of the invention
The present invention is directed to shortcomings and deficiencies of the prior art, it is good that object is to provide a kind of denitrification effect, and unit surface sewage treating efficiency is high, the combined artificial wetland that integrated engineering floor space is little.
The object of the invention is realized by following technical proposals:
A kind of two horizontal drowned flow gas operated combined artificial wetland, comprise into water water collecting basin, also comprise lower floor's Horizontal subsurface constructed wetland unit, lower floor's Horizontal subsurface constructed wetland unit is provided with anti seepage membrane, anti seepage membrane is provided with upper strata Horizontal subsurface constructed wetland unit, the feed-water end of upper strata Horizontal subsurface constructed wetland unit is communicated with water inlet water collecting basin, the water side of upper strata Horizontal subsurface constructed wetland unit is communicated with the top of middle mixing pit, the bottom of middle mixing pit is communicated with the feed-water end of lower floor's Horizontal subsurface constructed wetland unit, the water side of lower floor's Horizontal subsurface constructed wetland unit is communicated with water outlet water collecting basin, also comprise several airways, the equal one end of each airway is arranged in lower floor's Horizontal subsurface constructed wetland unit, the other end all exposes outside the Horizontal subsurface constructed wetland unit of upper strata.
Upper strata as above Horizontal subsurface constructed wetland unit is provided with vegetable layer, vegetable layer comprise in reed, cattail, again power flower, iris, Canna generalis Bailey, Medulla Junci, calamus one or more.
The top of water inlet water collecting basin as above is communicated with the feed-water end of upper strata Horizontal subsurface constructed wetland unit by water inlet rectification hole, and the bottom of water inlet water collecting basin is communicated with system water inlet pipe.
The bottom of water outlet water collecting basin as above is provided with water outlet water collecting basin packing layer, the bottom of water outlet water collecting basin is crossed water rectification hole by water side and is communicated with the water side of lower floor Horizontal subsurface constructed wetland unit, the bottom of described middle mixing pit is provided with middle mixing pit packing layer, the bottom of middle mixing pit is crossed water rectification hole by feed-water end and is communicated with the feed-water end of lower floor Horizontal subsurface constructed wetland unit, the position that the sidewall of water outlet water collecting basin is positioned at bottom water outlet water collecting basin packing layer is provided with system blow-down pipe, the position that the sidewall of water outlet water collecting basin is positioned at water outlet water collecting basin packing layer top is provided with system rising pipe.
The top of middle mixing pit packing layer as above is positioned at feed-water end and crosses 0.1 ~ 0.2m above water rectification hole, and the top of water outlet water collecting basin packing layer is positioned at water side and crosses 0.1 ~ 0.2m above water rectification hole.
Middle mixing pit packing layer as above is the gravel filling of 25 ~ 50mm; Water outlet water collecting basin packing layer is the gravel filling of 25 ~ 50mm.
Upper strata as above Horizontal subsurface constructed wetland unit is followed successively by the first upper strata wet land filler layer, the second upper strata wet land filler layer and the 3rd upper strata wet land filler layer from feed-water end to water side.
The gravel filling layer of the first upper strata wet land filler layer as above to be particle diameter be 30 ~ 40mm; The gravel filling layer of the second described upper strata wet land filler layer to be particle diameter be 8 ~ 12mm; The 3rd described upper strata wet land filler layer is the gravel filling layer of particle diameter 30 ~ 40mm; The thickness of the first upper strata wet land filler layer, the second upper strata wet land filler layer and the 3rd upper strata wet land filler layer is 0.8 ~ 1.2m.
Airway as above along lower floor's Horizontal subsurface constructed wetland unit water (flow) direction according to 40 ° ~ 55 ° oblique cuttings on the combined artificial wetland be made up of upper strata Horizontal subsurface constructed wetland unit, anti seepage membrane and lower floor's Horizontal subsurface constructed wetland unit.
Bottom 0.2 ~ the 0.3m higher than the bottom of lower floor's Horizontal subsurface constructed wetland unit of airway as above, upper strata Horizontal subsurface constructed wetland unit 0.1m ~ 0.2m is exposed at the top of airway, and the layout density of airway is not less than 9/m 2.
The invention has the advantages that:
1, two-stage Horizontal subsurface constructed wetland is carried out compound in vertical direction, make the absorption of matrix, filtering efficiency is fully used, effectively improve the removal ability of wetland to multiclass pollutents such as SS, N, P, COD, heavy metals, applied widely, can be used for the process of multiclass waste water.
2, airway is arranged along water (flow) direction, current can form negative pressure to air guide inner air tube, extraneous air is more easily inhaled into compared with the vertical airway of routine, efficiently solves the problem of lower floor's wetland anoxic, promote lower floor's wetland to the processing power of pollutent especially ammonia nitrogen.
3, apparatus of the present invention compact construction, hydraulic load is high, can effectively reduce project occupation of land area, saves engineering construction cost.
4, two-stage wetland is horizontal drowned flow formula, and weather is less to wetland variation influential effect, and system stability is good.
Accompanying drawing explanation
Fig. 1 is the two horizontal drowned flow gas operated combined artificial wetland structural representation of one provided by the present invention.
Wherein:
1-system water inlet pipe, 2-water inlet pipe valve, 3-water inlet water collecting basin, 4-water inlet rectification hole, 5-upper strata Horizontal subsurface constructed wetland unit, 6-the first upper strata wet land filler layer, 7-the second upper strata wet land filler layer, 8-the 3rd upper strata wet land filler layer, 9-vegetable layer, 10-upper strata wetland effluent pipe, 11-rising pipe valve, 12-middle mixing pit, 13-middle mixing pit packing layer, 14-feed-water end crosses water rectification hole, 15-anti seepage membrane, 16-lower floor Horizontal subsurface constructed wetland unit, 17-lower floor wet land filler layer, 18-airway, 19-crosses water side water rectification hole, 20-water outlet water collecting basin, 21-water outlet water collecting basin packing layer, 22-system blow-down pipe, 23-system blow-down pipe valve, 24-system rising pipe, 25-system rising pipe valve.
Embodiment
A kind of two horizontal drowned flow gas operated combined artificial wetland, carries out compound by two-stage Horizontal subsurface constructed wetland, and implant airway 18 in lower floor's wet land filler layer 17 on vertical space; A kind of pair of horizontal drowned flow gas operated combined artificial wetland comprise with lateral septal from closed wetland body of wall, water outlet water collecting basin 20, water collecting basin 3 of intaking, upper strata Horizontal subsurface constructed wetland unit 5, lower floor's Horizontal subsurface constructed wetland unit 16, middle mixing pit 12.Wherein, separated by anti seepage membrane 15 between upper and lower two-layer Horizontal subsurface constructed wetland unit 5/16; Water outlet water collecting basin 20, water inlet water collecting basin 3, combined artificial wetland (comprising the entirety of upper and lower two-layer Horizontal subsurface constructed wetland unit 5/16 and middle anti seepage membrane 15 layers formation), middle mixing pit 12 are separated by partition wall each other.Sewage enters into water water collecting basin 3 by system water inlet pipe 1, then flow into after upper strata Horizontal subsurface constructed wetland unit 5 processes and enter middle mixing pit 12, flowing into lower floor's Horizontal subsurface constructed wetland unit 16 again and carry out secondary-cleaned, discharging by running rising pipe after finally entering water outlet water collecting basin 20.
Embodiment 1:
A kind of two horizontal drowned flow gas operated combined artificial wetland, comprises water outlet water collecting basin 20, water inlet water collecting basin 3, upper strata Horizontal subsurface constructed wetland unit 5, lower floor's Horizontal subsurface constructed wetland unit 16, middle mixing pit 12.Wherein, separated by anti seepage membrane 15 between described upper and lower two-layer Horizontal subsurface constructed wetland unit; Described water outlet water collecting basin 20, water inlet water collecting basin 3, combined artificial wetland (comprising the entirety of upper and lower two-layer Horizontal subsurface constructed wetland unit 5/16 and middle anti seepage membrane 15 layers formation), middle mixing pit 12 are separated by partition wall each other.
Described water inlet water collecting basin 3 comprises system water inlet pipe 1, water inlet water collecting basin pond body.Water inlet water collecting basin 3 is located at the feed-water end of upper strata Horizontal subsurface constructed wetland unit 5, it arranges object is ensure stablizing of wetland amount of inlet water, system water inlet pipe 1 adopts UPVC or the PE pipe of one or more DN100-DN300 according to process water yield difference, and on system water inlet pipe 1, establish water inlet pipe valve 2 to control amount of inlet water; Water inlet rectification hole 4 established by water inlet water collecting basin 3 in top layer Horizontal subsurface constructed wetland unit 5 side.
Described upper strata Horizontal subsurface constructed wetland unit 5 comprises vegetable layer 9, packing layer and rising pipe.Vegetable layer 9 is one in reed, cattail, again power flower, iris, Canna generalis Bailey, Medulla Junci, calamus or arbitrary combination; Packing layer has the first upper strata wet land filler layer 6, second upper strata wet land filler layer the 7, the 3rd upper strata wet land filler layer 8 successively by direction to the water outlet direction that intakes, first upper strata wet land filler layer 6 for particle diameter be the gravel filling layer of 30 ~ 40mm, second upper strata wet land filler layer 7 for particle diameter be the gravel filling layer of 8 ~ 12mm, the 3rd upper strata wet land filler layer 8 is the gravel filling layer of particle diameter 30 ~ 40mm, the packing layer thickness in the first upper strata wet land filler layer 6, second upper strata wet land filler layer 7 and the 3rd upper strata wet land filler layer 8 is 0.8 ~ 1.2m; Upper strata wetland effluent pipe 10 is positioned at the division wall top of upper strata Horizontal subsurface constructed wetland unit 5 and middle mixing pit 12, adopt UPVC or the PE pipe of one or more DN100 ~ DN300 according to process water yield difference, and on upper strata wetland effluent pipe 10, set out aqueduct valve 11 control water flow.
Described middle mixing pit 12 comprises mixing pit pond body and middle mixing pit packing layer 13.Middle mixing pit 12 is located at the water side of upper strata Horizontal subsurface constructed wetland unit 5, be communicated with upper and lower two-stage artificial swamp, middle mixing pit packing layer 13 is laid in the bottom of middle mixing pit 12, bottom layer Horizontal subsurface constructed wetland unit 16 side abutment wall on the lower, establish feed-water end to cross water rectification hole 14, middle mixing pit packing layer 13 for particle diameter be the gravel filling of 25 ~ 50mm, middle mixing pit packing layer 13 mistake feed-water end crosses water rectification hole 14 top 0.1 ~ 0.2m.It arranges object is make feed-water end cross water rectification hole 16 to intake evenly.
Described lower floor Horizontal subsurface constructed wetland unit 16 is made up of packing layer and airway 18, and packing layer is the gravel filling of particle diameter 12 ~ 25mm, and thickness is 0.8 ~ 1.2m; Airway 18 is UPVC pipe or the PE pipe of DN25, along lower floor's Horizontal subsurface constructed wetland unit 16 water (flow) direction 40 ° ~ 55 ° oblique cuttings in packing layer, than 0.2 ~ 0.3m high bottom packing layer bottom airway 18, upper strata Horizontal subsurface constructed wetland unit 5 packing layer 0.1m ~ 0.2m is exposed at airway 18 top, arranges that density is not less than 9/m 2.
Described water outlet water collecting basin 20 comprises system rising pipe 24, system blow-down pipe 22, water outlet water collecting basin packing layer 21 and water outlet water collecting basin pond body.Water outlet water collecting basin 20 is located at the water side of lower floor's Horizontal subsurface constructed wetland unit 16, bottom layer Horizontal subsurface constructed wetland unit 16 side abutment wall on the lower, set out water end (W.E.) cross water rectification hole 19, gravel filling (particle diameter 25 ~ 50mm) is laid in the bottom of water outlet water collecting basin 20, water outlet water collecting basin packing layer 21 did not have water side to cross water rectification hole 19 top 0.1 ~ 0.2m, and it arranges object is ensure wetland effluent water quality and the water yield stable; System rising pipe 24 is positioned on the exterior wall of water outlet water collecting basin packing layer 21 top, adopts UPVC or the PE pipe of one or more DN100 ~ DN300, and on pipeline, establish Valve controlling water flow according to process water yield difference; System blow-down pipe 22 is positioned at bottom water outlet water collecting basin packing layer 21 on exterior wall, adopts UPVC or the PE pipe of one or more DN100 ~ DN300, and on pipeline, establish valve to control emptying according to process water yield difference.
Embodiment 2
As shown in Figure 1, a kind of two horizontal drowned flow gas operated combined artificial wetland, comprise system water inlet pipe 1, water inlet pipe valve 2, water inlet water collecting basin 3, water inlet rectification hole 4, upper strata Horizontal subsurface constructed wetland unit 5, first upper strata wet land filler layer 6, second upper strata wet land filler layer 7, 3rd upper strata wet land filler layer 8, vegetable layer 9, upper strata wetland effluent pipe 10, rising pipe valve 11, middle mixing pit 12, middle mixing pit packing layer 13, feed-water end crosses water rectification hole 14, anti seepage membrane 15, lower floor's Horizontal subsurface constructed wetland unit 16, lower floor's wet land filler layer 17, airway 18, water rectification hole 19 is crossed in water side, water outlet water collecting basin 20, water outlet water collecting basin packing layer 21, system blow-down pipe 22, system blow-down pipe valve 23, system rising pipe 24, system rising pipe valve 25.
System water inlet pipe 1, upper strata wetland effluent pipe 10, system blow-down pipe 22, system rising pipe 24 are the UPVC pipe of a DN300.
Water inlet pipe valve 2, rising pipe valve 11, system blow-down pipe valve 23, system rising pipe valve 25 are manual soft sealing butterfly valve.
Water inlet water collecting basin 3 is reinforced concrete structure, and specification is L × B × H (wherein L is for long, and B is wide, and H is high)=5m × 0.5m × 1.3m.
Water inlet rectification hole 4 specification is B × H=0.2 × 0.3m, totally 4, each interval 1m.
Horizontal subsurface constructed wetland unit 5 pond, upper strata body is reinforced concrete structure, and specification is L × B × H=10m × 5m × 1.3m.
First upper strata wet land filler layer 6 for particle diameter be the gravel filling of 30 ~ 40mm, packing layer specification is L × B × H=5m × 1m × 1m.
Second upper strata wet land filler layer 7 for particle diameter be the gravel filling of 8 ~ 12mm, packing layer specification is L × B × H=5m × 8m × 1m.
3rd upper strata wet land filler layer 8 for particle diameter be the gravel filling of 30 ~ 40mm, packing layer specification is L × B × H=5m × 1m × 1m.
Vegetable layer 9 planting plants is reed, and planting density is 25 strains/m 2.
Middle mixing pit 12 is reinforced concrete structure, and specification is L × B × H=5m × 0.5m × 2.3m.
Middle mixing pit packing layer 13 particle diameter is 25 ~ 50mm, and thickness is 0.5m.
It is B × H=0.2 × 0.3m that feed-water end crosses water rectification hole 14 specification, totally 4, each interval 1m.
Anti seepage membrane 15 is HDPE anti seepage membrane (15).
Lower floor's Horizontal subsurface constructed wetland unit 16 pond body is reinforced concrete structure, and specification is L × B × H=10.5m × 5m × 1m.
Lower floor's wet land filler layer 17 for particle diameter be the gravel filling of 12 ~ 25mm, packing layer specification is 0.5m × 5m × 1m.
Airway 18 is the UPVC pipe of DN25, arranges that density is 9/m 2.
It is B × H=0.2 × 0.3m that water rectification hole 19 specification is crossed in water side, totally 4, each interval 1m.
Water outlet water collecting basin 20 is reinforced concrete structure, and specification is L × B × H=5m × 0.5m × 2.3m.
Water outlet water collecting basin packing layer 21 particle diameter is 25 ~ 50mm, and thickness is 0.5m.
Other parts are consistent with embodiment 1.
Table 1 is for adopting the test-results of the present embodiment:
Embodiment 3
Embodiment 3 is with the difference of embodiment 2:
System water inlet pipe 1, upper strata wetland effluent pipe 10, system blow-down pipe 22, system rising pipe 24 are the UPVC pipe that two spacing are the DN200 of 2m.
Water inlet water collecting basin 3 is reinforced concrete structure, and specification is L × B × H=5m × 0.5m × 1.4m.
Horizontal subsurface constructed wetland unit 5 pond, upper strata body is reinforced concrete structure, and specification is L × B × H=10m × 5m × 1.4m.
First upper strata wet land filler layer 6 for particle diameter be the gravel filling of 30 ~ 40mm, packing layer specification is L × B × H=5m × 1m × 1.1m.
Second upper strata wet land filler layer 7 for particle diameter be the gravel filling of 8 ~ 12mm, packing layer specification is L × B × H=5m × 8m × 1.1m.
3rd upper strata wet land filler layer 8 for particle diameter be the gravel filling of 30 ~ 40mm, packing layer specification is L × B × H=5m × 1m × 1.1m.
Vegetable layer 9 planting plants is iris, and planting density is 25 strains/m 2.
Middle mixing pit 12 is reinforced concrete structure, and specification is L × B × H=5m × 0.5m × 2.5m.
Lower floor's Horizontal subsurface constructed wetland unit 16 pond body is reinforced concrete structure, and specification is L × B × H=10.5m × 5m × 1.1m.
Lower floor's wet land filler layer 17 for particle diameter be the gravel filling of 12 ~ 25mm, packing layer specification is 0.5m × 5m × 1.1m.
Airway 18 is the UPVC pipe of DN25, arranges that density is 12/m 2.
Water outlet water collecting basin 20 is reinforced concrete structure, and specification is L × B × H=5m × 0.5m × 2.5m.
Other parts are consistent with embodiment 1.
Following table is adopt the test-results of the present embodiment: table 2 is the test-results adopting the present embodiment:
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.

Claims (10)

1. a two horizontal drowned flow gas operated combined artificial wetland, comprise into water water collecting basin (3), its feature is lain in, also comprise lower floor's Horizontal subsurface constructed wetland unit (16), lower floor's Horizontal subsurface constructed wetland unit (16) is provided with anti seepage membrane (15), anti seepage membrane (15) is provided with upper strata Horizontal subsurface constructed wetland unit (5), the feed-water end on upper strata Horizontal subsurface constructed wetland unit (5) is communicated with water inlet water collecting basin (3), the water side on upper strata Horizontal subsurface constructed wetland unit (5) is communicated with the top of middle mixing pit (12), the bottom of middle mixing pit (12) is communicated with the feed-water end of lower floor's Horizontal subsurface constructed wetland unit (16), the water side of lower floor's Horizontal subsurface constructed wetland unit (16) is communicated with water outlet water collecting basin (20), also comprise several airways (18), each airway (18) is all arranged in lower floor's Horizontal subsurface constructed wetland unit (16) in one end, the other end all exposes upper strata Horizontal subsurface constructed wetland unit (5) outward.
2. the two horizontal drowned flow gas operated combined artificial wetland of one according to claim 1, it is characterized in that, described upper strata Horizontal subsurface constructed wetland unit (5) is provided with vegetable layer (9), vegetable layer (9) comprise in reed, cattail, again power flower, iris, Canna generalis Bailey, Medulla Junci, calamus one or more.
3. the two horizontal drowned flow gas operated combined artificial wetland of one according to claim 1, it is characterized in that, the top of described water inlet water collecting basin (3) is communicated with the feed-water end on upper strata Horizontal subsurface constructed wetland unit (5) by water inlet rectification hole (4), and the bottom of water inlet water collecting basin (3) is communicated with system water inlet pipe (1).
4. according to claims 1 to 3 any one pair horizontal drowned flow gas operated combined artificial wetland, it is characterized in that, the bottom of described water outlet water collecting basin (20) is provided with water outlet water collecting basin packing layer (21), the bottom of water outlet water collecting basin (20) is crossed water rectification hole (19) by water side and is communicated with the water side of lower floor's Horizontal subsurface constructed wetland unit (16), the bottom of described middle mixing pit (12) is provided with middle mixing pit packing layer (13), the bottom of middle mixing pit (12) is crossed water rectification hole (14) by feed-water end and is communicated with the feed-water end of lower floor's Horizontal subsurface constructed wetland unit (16), the position that the sidewall of water outlet water collecting basin (20) is positioned at bottom water outlet water collecting basin packing layer (21) is provided with system blow-down pipe (22), the position that the sidewall of water outlet water collecting basin (20) is positioned at water outlet water collecting basin packing layer (21) top is provided with system rising pipe (24).
5. the two horizontal drowned flow gas operated combined artificial wetland of one according to claim 4, it is characterized in that, the top of described middle mixing pit packing layer (13) is positioned at feed-water end and crosses water rectification hole (14) top 0.1 ~ 0.2m, and the top of water outlet water collecting basin packing layer (21) is positioned at water side and crosses water rectification hole (19) top 0.1 ~ 0.2m.
6. the two horizontal drowned flow gas operated combined artificial wetland of one according to claim 5, it is characterized in that, described middle mixing pit packing layer (13) is the gravel filling of 25 ~ 50mm; Water outlet water collecting basin packing layer (21) is the gravel filling of 25 ~ 50mm.
7. according to claims 1 to 3 any one pair horizontal drowned flow gas operated combined artificial wetland, it is characterized in that, described upper strata Horizontal subsurface constructed wetland unit (5) is followed successively by the first upper strata wet land filler layer (6), the second upper strata wet land filler layer (7) and the 3rd upper strata wet land filler layer (8) from feed-water end to water side.
8. the two horizontal drowned flow gas operated combined artificial wetland of one according to claim 7, is characterized in that, the first described upper strata wet land filler layer (6) for particle diameter be the gravel filling layer of 30 ~ 40mm; The second described upper strata wet land filler layer (7) for particle diameter be the gravel filling layer of 8 ~ 12mm; The gravel filling layer that the 3rd described upper strata wet land filler layer (8) is particle diameter 30 ~ 40mm; The thickness on the first upper strata wet land filler layer (6), the second upper strata wet land filler layer (7) and the 3rd upper strata wet land filler layer (8) is 0.8 ~ 1.2m.
9. according to claims 1 to 3 any one pair horizontal drowned flow gas operated combined artificial wetland, it is characterized in that, described airway (18) along lower floor's Horizontal subsurface constructed wetland unit (16) water (flow) direction according to 40 ° ~ 55 ° oblique cuttings on the combined artificial wetland be made up of upper strata Horizontal subsurface constructed wetland unit (5), anti seepage membrane (15) and lower floor's Horizontal subsurface constructed wetland unit (16).
10. the two horizontal drowned flow gas operated combined artificial wetland of one according to claim 7, it is characterized in that, bottom 0.2 ~ the 0.3m higher than the bottom of lower floor's Horizontal subsurface constructed wetland unit (16) of described airway (18), upper strata Horizontal subsurface constructed wetland unit (5) 0.1m ~ 0.2m is exposed at the top of airway (18), and the layout density of airway (18) is not less than 9/m 2.
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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
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