CN203639245U - Combined artificial wetland system - Google Patents
Combined artificial wetland system Download PDFInfo
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- CN203639245U CN203639245U CN201320859312.9U CN201320859312U CN203639245U CN 203639245 U CN203639245 U CN 203639245U CN 201320859312 U CN201320859312 U CN 201320859312U CN 203639245 U CN203639245 U CN 203639245U
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- water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses a combined artificial wetland system, belonging to the field of sewage treatment. The combined artificial wetland system comprises three stages of artificial wetland which is connected in sequence, wherein the first stage adopts surface flow-subsurface flow integrated flow wetland, the second stage adopts horizontal subsurface flow wetland, and the third stage adopts vertical subsurface flow wetland; the surface flow-subsurface flow integrated flow wetland comprises a first tank body, the horizontal subsurface flow wetland comprises a second tank body, the vertical subsurface flow wetland comprises a third tank body, calcium-aluminum mixed packing layers are arranged inside the first tank body, the second tank body and the third tank body, and calcium-aluminum mixed packing is formed by mixing and firing aluminum-containing sludge and lime. The combined artificial wetland system disclosed by the utility model can efficiently remove CODCr, ammonia nitrogen, total nitrogen, total phosphorus and fluorine contaminants in tail water, and effluent indicators all reach the Class IV of Environmental Quality Standards for Surface Water (GB3838-2002).
Description
Technical field
The utility model belongs to sewage treatment area, more particularly, relates to a kind of combination subsurface flow constructed wetland system for the treatment of chemical industrial park sewage treatment plant tail water.
Background technology
According to the difference of sewage flow pattern in system, artificial marsh sewage treatment system can be divided into two types of surface stream (SFCW) and undercurrents (SSFCW), the latter divides again horizontal flow (HSSFCW) and two kinds of water distribution manners of vertical current (VSSFCW), and what also have is designed to water distribution manner waveform running (WSSFCW).
Artificial swamp is to BOD
5, COD
cr, SS and polluted bacteria clearance can reach more than 90%, but lower and unstable to the clearance of nitrogen phosphorus.In artificial swamp application at present, existing problems are mainly that Constructed Wetland For Purifying urban wastewater treatment firm tail water nitrogen, phosphorus removal difficulty are larger.The irrational formation of influent quality and winter low temperature bring challenges to the stably reaching standard of urban wastewater treatment firm water outlet TN.Investigation is found, in water inlet at some containing the town sewage plant of trade effluent, can not be by the content of ammonification and biodegradable special itrogenous organic substance up to more than 10mg/L, during urban wastewater treatment firm water inlet TN forms, not aminable organonitrogen is generally about 30%, has therefore had a strong impact on the up to standard of urban wastewater treatment firm water outlet TN.Taihu Lake basin nearly 50% urban wastewater treatment firm need add additional carbon for denitrification denitrogenation.Cold condition causes microbe population in Sewage treatment systems to reduce, activity decreased.The Taihu Lake basin sewage disposal technology achievement of tackling key problem shows, the minimum temperature of this basin sewage work sewage is 10 ℃ of left and right, when water temperature in winter is during lower than 15 ℃, the nitration denitrification performance of Nitrogen removal effect and active sludge is started obviously by the impact of low temperature, and urban wastewater treatment firm water outlet TN difficulty up to standard increases.
Publication number: 1583604, open day: 2005-02-23, applicant: the Chinese patent document of Agricultural University Of South China discloses one way of life sewage vertical flowing-horizontal flowing composite artificial wet land denitrification and dephosphorization method, the method is pressed vertical current constructed wetland front, the posterior order of the horizontal flow artificial wetland composition combined artificial wetland that is together in series, sanitary sewage is first through vertical current constructed wetland, pass through again horizontal flow artificial wetland, and make part raw sewerage directly enter horizontal flow artificial wetland with supplementary carbon source; In vertical current and horizontal flow artificial wetland, all fill efficient dephosphorization matrix, and on substrate of vertical-flow constructed wetlands, plant Lu Sheng flowers and fresh-cut flowers, planting vegetable in horizontal flow artificial wetland matrix.Its weak point is: (1) vertical flow direct taps into the water capacity body obstruction easily occurs, research shows, the especially inorganic suspended substance of suspended substance, hold back but the organic suspended matter that is not degraded is the major cause of stopping up, obstruction process occurs in vertical-flow wetland filler at the middle and upper levels substantially.Therefore, increase current wetland water inlet contact area effectively dispersed suspension, in the accumulation of bed body, meanwhile, is further strengthened current wetland reoxygenation ability, improves wetland to holding back organic degraded, and then alleviates the ponding of vertical-flow wetland; (2) part tail water directly discharge after horizontal subsurface flow wetland is processed, because horizontal subsurface flow wetland reoxygenation is indifferent, in tail water, ammonia nitrogen is failed effectively by nitrated direct discharge, has weakened combinatorial artificial wetland and has removed ammonia nitrogen, total nitrogen ability.
Summary of the invention
The technical problem that 1, will solve
, biodegradability poor, low BOD large for the chemical industrial park sewage treatment plant tail water water quality and quantity fluctuation existing in prior art
5the problems such as/N, the utility model provides a kind of combinatorial artificial wet land system, can efficiently remove COD in tail water
cr, ammonia nitrogen, total nitrogen, total phosphorus and fluorine pollutant, effluent index all reaches " water environment quality standard " (GB3838-2002) IV class.
2, technical scheme
The purpose of this utility model is achieved through the following technical solutions.
A kind of combinatorial artificial wet land system, it comprises three grades of wetlands that connect successively, and the first step adopts surface stream-undercurrent combined-flow wetland, and the second stage adopts horizontal subsurface flow wetland, and the third stage adopts vertical subsurface flow wetland;
Described surface stream-undercurrent combined-flow wetland comprises the first casing, and horizontal subsurface flow wetland comprises the second casing, and vertical subsurface flow wetland comprises the 3rd casing, is provided with calcium aluminium mixed type packing layer in first, second and third casing;
In the first described casing, establish inverted dovetail groove, wide at the top and narrow at the bottom, in dovetail groove, be followed successively by from top to bottom reed, calcium aluminium mixed type packing layer, the first water inlet water distributing pipe is arranged on the side wall upper part of the first casing; The bottom of described dovetail groove is provided with water outlet header and the first rising pipe, and the top of described horizontal subsurface flow wetland is accessed in the water side of the first described rising pipe.
Preferably, in the second described casing, be vertically provided with two water inlet water distribution porous barriers, between the sidewall of two water inlet water distribution porous barriers and described the second casing, form respectively intake catchment area and the first water outlet catchment area, between two water inlet water distribution porous barriers, be followed successively by from top to bottom reed, calcium aluminium mixed type packing layer and sandstone packing layer, on the first described water outlet catchment area sidewall, be provided with the second rising pipe.
Preferably, the top of the 3rd described casing is provided with the second water inlet water distributing pipe, the feed-water end of the second described water inlet water distributing pipe is connected with the second described rising pipe, on the second water inlet water distributing pipe, be provided with perpendicular to the second water inlet water distributing pipe and be positioned at the vertical riser of horizontal plane, in vertical riser, be provided with some holes, in the 3rd described casing, be followed successively by from top to bottom reed, calcium aluminium mixed type packing layer and sandstone packing layer, described the 3rd casing and the second water outlet catchment area join, and the bottom of the second described water outlet catchment area is provided with the 3rd rising pipe.
3, beneficial effect
Than prior art, the utility model has the advantages that:
(1) in the present invention, combinatorial artificial wet land system comprises surface stream-undercurrent combined-flow wetland, three grades of horizontal subsurface flow wetland and vertical subsurface flow wetlands are in series, in the stream-undercurrent combined-flow wetland of first step surface, intake and contact with three of wetlands, effectively increase the contact area of water inlet and wetland, in addition, because water is in surface flow, between water and air, there is oxygen transfer process, combined-flow wetland has very strong reoxygenation ability, for the anti-raw nitration reaction of ammonia nitrogen in tail water provides environment, remove most of organism in tail water simultaneously, effectively alleviate the easy blockage problem of undercurrent, guarantee artificial wet land system operation steady in a long-term, improve artificial swamp to COD
cr, ammonia nitrogen, nitric nitrogen and total nitrogen removal effect,
(2) second stage horizontal subsurface flow wetland is dredged badly due to himself waterpower, and band oxygen ability, easily forms anaerobic zone, be easy to be formed with and be beneficial to microorganism and carry out denitrifying anoxia condition, can remove nitric nitrogen in vertical subsurface flow wetland water outlet, and then reach denitrogenation, stablize effluent quality;
(3) third stage vertical subsurface flow wetland is for removing the ammonia nitrogen of horizontal subsurface flow wetland distributing inlet, and organism in the secondary wetland effluent of simultaneously further degrading, stablizes effluent quality.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present utility model;
Fig. 2 is the structure for amplifying schematic diagram of the compound wetland of first step surface stream-undercurrent in Fig. 1;
Fig. 3 is the structure for amplifying schematic diagram of the second stage horizontal subsurface flow wetland in Fig. 1;
Fig. 4 is the structure for amplifying schematic diagram of the third stage vertical subsurface flow wetland in Fig. 1.
In figure: 1, surface stream-undercurrent combined-flow wetland; 11, the first casing; 12, dovetail groove; 13, the first water inlet water distributing pipe; 14, water outlet header; 15, the first rising pipe; 16, reed; 17, calcium aluminium mixed type packing layer;
2, horizontal subsurface flow wetland; 21, the second casing; 22, water inlet water distribution porous barrier; 23, water inlet catchment area; 24, the first water outlet catchment area; 25, the second rising pipe; 26, sandstone packing layer;
3, vertical subsurface flow wetland; 31, the 3rd casing; 32, vertical riser; 33, the second water outlet catchment area; 34, the 3rd rising pipe; 35, the second water inlet water distributing pipe.
Embodiment
Below with reference to accompanying drawing and concrete embodiment, the utility model is described in further detail.
As shown in Figure 1, apparatus of the present invention mainly comprise three grades of current wetlands: first step surface stream-undercurrent combined-flow wetland 1, second stage horizontal subsurface flow wetland 2 and third stage vertical subsurface flow wetland 3.
As Fig. 2, the concrete size length × wide × height of the first casing 11 of surface stream-undercurrent combined-flow wetland 1 is 70cm × 70cm × 100cm, and the first water inlet water distributing pipe 13 is acrylic pipe, wherein, house steward's diameter DN32, establishes dovetail groove 12 in wetland, this dovetail groove 12 is wide at the top and narrow at the bottom.Filler in dovetail groove 12 is calcium aluminium mixed type packing layer 17, thick 800mm, and particle diameter 8-15mm, plants and is implanted with reed 16 on filler.Water outlet header 14 caliber DN32, the "T"-shaped shape of distribution mode distributes, and the first rising pipe 15 is acrylic pipe, diameter DN32.
As Fig. 3, the concrete size length × wide × height of the second casing 21 of second stage horizontal subsurface flow wetland 2 is 100cm × 50cm × 70cm, and the perforation of water inlet water distribution porous barrier 22 is arranged as perforation interval 5cm, is of a size of
between two water inlets water distribution porous barrier 22 and the sidewalls of the second casing 21, form respectively intake catchment area 23 and the first water outlet catchment area 24.The first concrete size length × wide × height in water outlet catchment area 24 is 25cm × 50cm × 70cm, and the thickness of the calcium aluminium mixed type packing layer 17 between two water inlet water distribution porous barriers 22 is 350mm, and the filler bed thickness of sandstone packing layer 26 is 150mm.On calcium aluminium mixed type packing layer 17, plant and be implanted with reed 16.On the first water outlet catchment area 24 sidewalls, be provided with the second rising pipe 25.
As Fig. 4, the concrete size length × wide × height of the 3rd casing 31 of third stage vertical subsurface flow wetland 3 is 70cm × 70cm × 100cm, second water inlet water distributing pipe 35 use acrylic pipe, wherein house steward's diameter DN32, at interval of 8cm upwards 45 ° open
circular hole, vertical riser 32 is used the acrylic pipe of diameter DN32, makes a call to two diameters along height every 8cm
aperture, by perforate staggered arrangement, guarantees that water distribution is even, and then improves vertical subsurface flow wetland 3 decontamination effect improvings.The second concrete size length × wide × height in water outlet catchment area 33 is 30cm × 70cm × 100cm, and the 3rd rising pipe 34 is DN50, calcium aluminium mixed type packing layer 17 thick 600mm, particle diameter 8-15mm, the thick 200mm of sandstone packing layer 26, particle diameter 40-50mm.The calcium aluminium mixed type filler using in above-mentioned three grades of wetlands forms by discarded aluminum-containing mud and lime mixed sintering, and aluminium-containing sludge and lime ratio are 1:1, roasting 2h under 600 ℃ of conditions.
The sewage water treatment method of above-mentioned combinatorial artificial wet land system, the steps include:
(1) chemical industrial park sewage treatment plant tail water adopts the continuous water intake mode of segmentation, first enter into the first casing 11 through the first water inlet water distributing pipe 13 of first step surface stream-undercurrent combined-flow wetland 1, current on the one hand with surface streamed flow through wetland bed, then flow in calcium aluminium mixed type packing layer 17 with undercurrent form, under filler, microorganism, reed 16 actings in conjunction, in tail water, ammonia nitrogen, organism, total phosphorus and fluorochemical obtain part removal, process water and flow out combined-flow wetland by the first rising pipe 15;
(2) coagulation water enters into the second casing 21 by the water distribution porous barrier 22 of intaking, current are with horizontal flow form process calcium aluminium mixed type packing layer 17 and sandstone packing layer 26, part tail water directly enters into horizontal subsurface flow wetland 2 simultaneously, and in tail water, partial organic substances and nitric nitrogen are removed under microbial process;
(3) secondary treated wastewater is entered into the 3rd casing 31 of vertical subsurface flow wetland 3 by the second rising pipe 25, water body is with downward streamed calcium aluminium mixed type packing layer 17 and the sandstone packing layer 26 of flowing through, in secondary treated wastewater, ammonia nitrogen is effectively removed, and organism is further degraded, stable effluent quality.Meanwhile, after three grades of wetlands are processed, in tail water, fluorochemical and total phosphorus are removed in the multistage adsorption process of calcium aluminium mixed type filler.
Adopt aforesaid combination subsurface flow constructed wetland system to process certain fluorine-containing tail water of chemical industrial park sewage work, influent quality is COD
cr=36.68 ± 4.30mg/L, BOD
5=7.34 ± 1.22mg/L, NH
4 +-n=1.76 ± 0.30mg/L, TN=3.39 ± 0.62mg/L, TP=0.05 ± 0.02mg/L, F-=5.44 ± 2.95mg/L.The operational conditions adopting is: multi-section water-inlet distribution ratio of liquid flow is 8:2, and hydraulic load is 0.4m
3/ m
2d.Treatment effect: principal pollutant COD
cr, BOD
5, NH
4 +-N,, TN, TP, F
-go out water concentration 9.28 ± 1.59mg/L, 0.25 ± 0.04mg/L, 0.08 ± 0.02mg/L, 0.37 ± 0.06mg/L, 0.002 ± 0.001mg/L, 0.46 ± 0.07mg/L, its clearance is respectively 74.7%, 97.6%, 95.3%, 89.2%, 95.8%, 95%.Effluent index all reaches " water environment quality standard " (GB3838-2002) IV class.
Claims (3)
1. a combinatorial artificial wet land system, is characterized in that, it comprises three grades of wetlands that connect successively, and the first step adopts surface stream-undercurrent combined-flow wetland (1), and the second stage adopts horizontal subsurface flow wetland (2), and the third stage adopts vertical subsurface flow wetland (3);
Described surface stream-undercurrent combined-flow wetland (1) comprises the first casing (11), horizontal subsurface flow wetland (2) comprises the second casing (21), vertical subsurface flow wetland (3) comprises the 3rd casing (31), is provided with calcium aluminium mixed type packing layer (17) in first, second and third casing;
In described the first casing (11), establish inverted dovetail groove (12), wide at the top and narrow at the bottom, in dovetail groove (12), be followed successively by from top to bottom reed (16), calcium aluminium mixed type packing layer (17), the first water inlet water distributing pipe (13) is arranged on the side wall upper part of the first casing (11); The bottom of described dovetail groove (12) is provided with water outlet header (14) and the first rising pipe (15), and the top of described horizontal subsurface flow wetland (2) is accessed in the water side of described the first rising pipe (15).
2. combinatorial artificial wet land system according to claim 1, it is characterized in that, in described the second casing (21), be vertically provided with two water inlet water distribution porous barriers (22), between the sidewall of two water inlet water distribution porous barriers (22) and described the second casing (21), form respectively intake catchment area (23) and the first water outlet catchment area (24), between two water inlet water distribution porous barriers (22), be followed successively by from top to bottom reed (16), calcium aluminium mixed type packing layer (17) and sandstone packing layer (26), on the first described water outlet catchment area (24) sidewall, be provided with the second rising pipe (25).
3. combinatorial artificial wet land system according to claim 2, it is characterized in that, the top of the 3rd described casing (31) is provided with the second water inlet water distributing pipe (35), the feed-water end of the second described water inlet water distributing pipe (35) is connected with described the second rising pipe (25), on the second water inlet water distributing pipe (35), be provided with perpendicular to the second water inlet water distributing pipe (35) and be positioned at the vertical riser (32) of horizontal plane, vertical riser is provided with some holes on (32), in the 3rd described casing (31), be followed successively by from top to bottom reed (16), calcium aluminium mixed type packing layer (17) and sandstone packing layer (26), the 3rd described casing (31) joins with the second water outlet catchment area (33), the bottom of the second described water outlet catchment area (33) is provided with the 3rd rising pipe (34).
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| CN201320859312.9U CN203639245U (en) | 2013-12-24 | 2013-12-24 | Combined artificial wetland system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996691A (en) * | 2018-06-15 | 2018-12-14 | 江苏龙腾工程设计股份有限公司 | A kind of aluminium sludge compounded mix and preparation method thereof for artificial swamp |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996691A (en) * | 2018-06-15 | 2018-12-14 | 江苏龙腾工程设计股份有限公司 | A kind of aluminium sludge compounded mix and preparation method thereof for artificial swamp |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20141224 |
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| EXPY | Termination of patent right or utility model |