CN101423297B - Composite vertical current artificial wetland oxygenation system - Google Patents
Composite vertical current artificial wetland oxygenation system Download PDFInfo
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- CN101423297B CN101423297B CN200810197811XA CN200810197811A CN101423297B CN 101423297 B CN101423297 B CN 101423297B CN 200810197811X A CN200810197811X A CN 200810197811XA CN 200810197811 A CN200810197811 A CN 200810197811A CN 101423297 B CN101423297 B CN 101423297B
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- artificial wetland
- vertical current
- pond
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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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- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
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- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a compound vertical flow artificial wetland oxygen increasing system. The system consists of an air compressor, a compound vertical flow artificial wetland, a downlink flow pool and an uplink flow pool; the downlink flow pool which is communicated with the bottom and the uplink flow pool form a compound vertical flow artificial wetland, the bottom of which is provided with at least three emptying tubes which are connected in parallel; the walls of the emptying tubes are provided with through holes; the emptying tubes at the bottom of the downlink flow pool are internally and respectively provided with perforated aeration tubes which are connected in parallel; and one end of the perforated aeration tube is closed, and the other end thereof is connected with an airway which is connected with the air compressor of the ground surface. The invention has simple structure and is provided with emptying tubes at the bottom of the compound vertical flow artificial wetland, conducts intermittent aeration in the emptying tubes at the bottom of the downlink flow tool on the optimized oxygen increasing condition, creates an environment condition of aerobic and anaerobic alternate change which is required by the nitrification and denitrification reactions, and greatly enhances the denitrification effect.
Description
Technical field
The invention belongs to the environmental engineering technical field of sewage, more specifically relate to a kind of simple efficient aeration system of composite vertical current artificial wetland, be applicable to sanitary sewage, polluted surface water, face source sewage, concentration are applicable to the sewage disposal of cold district simultaneously than the processing of high ammonia-nitrogen wastewater.
Technical background
Artificial swamp is the 20th century a kind of novel sewage treatment process that grow up of the seventies, have characteristics such as efficient height, cost is low, operational management is simple, be widely used in the processing and the lake pollution control of sanitary sewage, rural area pollution of area source, percolate.
The main path of artificial swamp denitrogenation is the nitrification and denitrification effect that relies on microorganism, and the removal amount of other removal approach such as plant absorbing, ammonia nitrogen volatilization etc. is considerably less.Nitration reaction is with NH
4 +-N is converted into NO
3 -The process of-N, it is an oxidizing reaction, needs aerobic wetland soil envrionment conditions; And anti-nitration reaction is with NO
3 --N is converted into N
2Process, it is a reduction reaction, needs anaerobic wetland soil envrionment conditions.Thereby, can create the height that the required envrionment conditions of nitrification and denitrification reaction is just directly determining wet land system denitrogenation ability.In most of artificial wetland of operation, very high to the clearance of TSS and BOD, and very low to the clearance of nitrogen, especially in the winter time, major cause is an oxygen supply deficiency in the wetland, and whole wetland inside is in that single to detest the anaerobic environment condition caused.
The oxygenation way of current artificial swamp has: the one, the perforate ventpipe is installed in wet land system, and carry out natural ventilation; The 2nd, with air compressor continuously or intermittently the tube having holes in wet land system strengthen ventilation; The 3rd, utilize the tube having holes bubbling air of wind energy in wet land system.These three kinds of oxygenation ways have following deficiency:
1, ventpipe is air gravity flow ventilation, and transfer of air efficient is not high; And the laying of multilayer ventpipe has increased the initial cost of wet land system.
2, the wind energy oxygen increasing mode is subjected to the restriction of region and weather very big, causes wet land system treatment effect instability.
3, three kinds of oxygenation ways are not all created aerobic, the envrionment conditions that anaerobism alternately changes of nitrated, the required optimum of anti-nitration reaction, cause NO in the wetland effluent
3 -The concentration of-N increases, and the clearance of nitrogen descends.
4, three kinds of oxygenation ways all are directly the perforate ventpipe to be embedded in the matrix of wet land system, and tiny grit very easily stops up the perforate of ventpipe.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of aeration system of composite vertical current artificial wetland is provided, this system architecture is simple, utilization is provided with evacuated tube in the composite vertical current artificial wetland bottom, in the evacuated tube of bottom, downstream pond, carry out intermittent aeration with optimization oxygenation condition, create nitrated, that anti-nitration reaction is required aerobic, anaerobism and replaced the envrionment conditions that changes, improved denitrification effect greatly.
To achieve these goals, the present invention adopts following technical measures: a kind of aeration system of composite vertical current artificial wetland, it is made up of air compressor, composite vertical current artificial wetland, downstream pond and up stream pond, it is characterized in that: the composite vertical current artificial wetland that downstream pond that is communicated with in the bottom and up stream pond are formed, bottom at composite vertical current artificial wetland is provided with at least three evacuated tube that are connected in parallel, and has through hole on the tube wall of evacuated tube; In the evacuated tube of bottom, downstream pond, arrange the boring aeration pipe that is connected in parallel respectively, the end sealing of boring aeration pipe, the other end connects airway, and airway links to each other with the air compressor on the face of land.
Constructional feature of the present invention is that also the percentage of open area of described boring aeration pipe is 30%～50%.
Constructional feature of the present invention is that also the aperture of the through hole on the described evacuated tube is 5～7mm, and pitch of holes is 150～200mm.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, utilization of the present invention aeration in the evacuated tube of bottom, downstream pond is difficult for causing the perforate on the boring aeration pipe to stop up; And simple in structure, make easy for installation.
2, the present invention adopts optimized oxygenation condition to carry out intermittent aeration, has created nitrated, that anti-nitration reaction is required aerobic, anaerobism and has replaced the envrionment conditions that changes, and has improved the wetland denitrification effect greatly.
3, described air compressor is 0.1～0.5m than aeration speed
3/ (hm
2), start/stop time is than for 4h:20h～12h:12h the time, and the clearance of nitrogen is the highest in the sewage.
Description of drawings
Fig. 1 (A) is a kind of aeration system structural representation of composite vertical current artificial wetland.
Fig. 1 (B) is the plan structure synoptic diagram of Fig. 1 (A).
Fig. 2 (A) is an evacuated tube plan structure synoptic diagram.
Fig. 2 (B) is the cross-sectional view of Fig. 2 (A).
Among the figure, air compressor 1, composite vertical current artificial wetland 2, downstream pond 3, up stream pond 4, airway 5, boring aeration pipe 6, evacuated tube 7, through hole 8.
Embodiment
The present invention is described further below in conjunction with drawings and Examples.
Referring to Fig. 1 (A), a kind of aeration system of composite vertical current artificial wetland, it is made up of air compressor, composite vertical current artificial wetland, downstream pond 3 and up stream pond 4, it is characterized in that: the composite vertical current artificial wetland 2 that downstream pond 3 that is communicated with in the bottom and up stream pond 4 are formed, bottom at composite vertical current artificial wetland is provided with at least three evacuated tube that are connected in parallel 7, has through hole 8 on the tube wall of evacuated tube 7; In the 3 bottom evacuated tube 7 of downstream pond, arrange the boring aeration pipe 6 that is connected in parallel respectively, the end sealing of boring aeration pipe 6, the other end connects airway 5, and airway 5 links to each other with the air compressor 1 on the face of land.Composite vertical current artificial wetland 2 of the present invention is made up of downstream pond 3 and up stream pond 4, is provided with partition wall in the middle of downstream pond 3 and the up stream pond 4, and the bottom is communicated with.All be filled with the sand (stone grain in small, broken bits) of different-grain diameter and gravel in downstream pond 3 and the up stream pond 4 as matrix (in rubble, broken watt, gravelstone or the rubble a kind of), wherein downstream pond 3 hypothalluses are than the high 10～20cm of hypothallus in up stream pond 4.In downstream pond 3 and up stream pond 4, implant aquatic, hygrophyte such as reed, cattail, nutgrass flatsedge, rhizoma scirpi, Rush, Canna generalis Bailey, metasequoia, calamus, Scirpus tabernaemontani, arrowhead, water harmony grass, Alternanthera sessilis (L.) DC., Chinese celery, sedge a kind of or arbitrary combination (4-14) wherein.
Referring to Fig. 1 (B), boring aeration pipe 6 is connected in parallel and is formed by at least three horizontal perforated pipes 6 (a), 6 (b), 6 (c), is installed in respectively in three evacuated tube that are connected in parallel 7 (a), 7 (b), 7 (c); Boring aeration pipe 6 is made according to the waste disposal plant design requirements, holes on the PVC of appropriate length plastics tubing, and percentage of open area is 30%～50%.
Referring to Fig. 2 (A), Fig. 2 (B), evacuated tube 7 is selected the PVC plastics tubing of Φ 110mm for use, and the aperture of the through hole 8 on the evacuated tube 7 is 5～7mm, and pitch of holes is 150～200mm.
During concrete enforcement, the envrionment conditions nitrated in order to create, that anti-nitration reaction is required is aerobic, anaerobism alternately changes improves the wetland denitrification effect, air compressor 1 be 0.1～0.5m than aeration speed
3/ (hm
2), start/stop time is than being 4h:20h～12h:12h.
Working process:
Composite vertical current artificial wetland 2 adopts the mode of operation of intermittent water inflow, plug-flow water outlet, when sewage when water inlet pipe enters downstream pond 3 and flows downward, start air compressor 1, the high-pressure air of its generation upwards enters downstream pond 3 through airway 5, boring aeration pipe 6, evacuated tube 7, form convection current with sewage, thereby increased the dissolved oxygen in the sewage, made downstream pond 3 form the aerobic environment condition, promoted the carrying out (NH of nitration reaction
4 +-N is converted into NO
3 --N), when this part contains a large amount of NO
3 -The sewage of-N is pushed when flowing to up stream pond 4, owing to the generation (NO that the anaerobic environment condition has promoted anti-nitration reaction that detests in up stream pond 4
3 --N is converted into N
2); (being start/stop time closes it than for 4h:20h～12h:12h) time when reach 4h～12h the working time of air compressor 1 simultaneously, the inside of composite vertical current artificial wetland 2 recovers to detest the anaerobic environment condition gradually, has further promoted the generation (NO of anti-nitration reaction
3 --N is converted into N
2), thereby finally realized thorough removal to nitrogen.
In one embodiment of the invention, composite vertical current artificial wetland is by downstream pond (1m * 1m * 0.7m) and up stream pond (1m * 1m * 0.6m) form, arrange boring aeration pipe in the evacuated tube of downstream pond bottom, air compressor be 0.1～0.5m than aeration speed
3/ (hm
2), start/stop time is than being 4h:20h～12h:12h.Hydraulic load is 0.2m
3/ (m
2D), influent ammonia nitrogen, total nitrogen concentration are about 11mg/L, 49mg/L respectively, and the clearance of measurement result ammonia nitrogen, total nitrogen is about 96%, 80% respectively.
Claims (5)
1. composite vertical current artificial wetland oxygenation system, it is made up of air compressor (1) and composite vertical current artificial wetland (2), it is characterized in that: composite vertical current artificial wetland (2) is formed in the downstream pond (3) that is communicated with in the bottom and up stream pond (4), bottom at composite vertical current artificial wetland (2) is provided with at least three evacuated tube that are connected in parallel (7), has through hole (8) on the tube wall of evacuated tube (7); In the evacuated tube (7) of downstream pond (3) bottom, arrange the boring aeration pipe (6) that is connected in parallel respectively, the end sealing of boring aeration pipe (6), the other end connects airway (5), and airway (5) links to each other with the air compressor (1) on the face of land.
2. a kind of composite vertical current artificial wetland oxygenation system according to claim 1, it is characterized in that: be provided with partition wall in the middle of downstream pond (3) and up stream pond (4), all be filled with sand and gravel in downstream pond (3) and up stream pond (4), downstream pond (3) hypothallus is than the matrix floor height 10～20cm of up stream pond (4).
3. a kind of composite vertical current artificial wetland oxygenation system according to claim 1, it is characterized in that: boring aeration pipe (6) is connected in parallel and is formed by at least three horizontal boring aeration pipes (6a, 6b, 6c), is installed in respectively in three evacuated tube that are connected in parallel (7a, 7b, 7c); Boring aeration pipe (6) is the PVC plastics tubing, and percentage of open area is 30%～50%.
4. a kind of composite vertical current artificial wetland oxygenation system according to claim 1 is characterized in that: the aperture of the through hole (8) on the evacuated tube (7) is 5～7mm, and pitch of holes is 150～200mm.
5. a kind of composite vertical current artificial wetland oxygenation system according to claim 1 is characterized in that: implant reed, cattail, nutgrass flatsedge, rhizoma scirpi, Rush, Canna generalis Bailey, metasequoia, calamus, Scirpus tabernaemontani, arrowhead, Alternanthera sessilis (L.) DC., Chinese celery, sedge a kind of or arbitrary combination wherein in downstream pond (3) and up stream pond (4).
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| CN200810197811XA CN101423297B (en) | 2008-11-24 | 2008-11-24 | Composite vertical current artificial wetland oxygenation system |
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| CN200810197811XA CN101423297B (en) | 2008-11-24 | 2008-11-24 | Composite vertical current artificial wetland oxygenation system |
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| CN101423297B true CN101423297B (en) | 2010-10-06 |
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Cited By (1)
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| CN102874988A (en) * | 2012-10-25 | 2013-01-16 | 复旦大学 | Method for enhancing treatment effect for high-nitrogen-load sewage |
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| CN101792213B (en) * | 2010-02-11 | 2011-09-21 | 农业部环境保护科研监测所 | Micro-power artificial wetland oxygen increasing device and oxygen increasing system thereof |
| CN101885565B (en) * | 2010-07-21 | 2012-02-01 | 河海大学 | Hydraulic power oxygenation constructed wetland |
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2008
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874988A (en) * | 2012-10-25 | 2013-01-16 | 复旦大学 | Method for enhancing treatment effect for high-nitrogen-load sewage |
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| CN101423297A (en) | 2009-05-06 |
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