CN103708623B - Vertical flow artificial wetland aerobic denitrification system for intermittent operation - Google Patents
Vertical flow artificial wetland aerobic denitrification system for intermittent operation Download PDFInfo
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- CN103708623B CN103708623B CN201410002615.8A CN201410002615A CN103708623B CN 103708623 B CN103708623 B CN 103708623B CN 201410002615 A CN201410002615 A CN 201410002615A CN 103708623 B CN103708623 B CN 103708623B
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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 invention discloses a vertical flow artificial wetland aerobic denitrification system for intermittent operation. The system comprises an automatic oxygenation system which is connected with a master intake pipe through a water pump. The automatic oxygenation system is characterized by comprising a spray water distributor, wherein the spray water distributor comprises an atomizer and is connected with a water pump; the spray water distributor is horizontally arranged above the vertical flow artificial wetland; porous gas filled tubes and denitrification exhaust pipes, which are uniformly distributed and vertically arranged, are arranged inside the vertical flow artificial wetland; the bottom of the vertical flow artificial wetland is connected with a master drain pipe. An oxygen-enriched environment is provided for a nitrification region at the middle part and the upper part of the wetland through a group of gas filled tubes which are vertically inserted into the artificial wetland; the contact time and the contact area of inflow water and atmosphere are increased through the spray water distributor so as to form oxygen-enriched inflow water; wetland nitrification and denitrification are enhanced; denitrification gas in the denitrification region can be quickly discharged in the water supply process by controlling a switch at the upper end of each denitrification exhaust pipe; wetland denitrification and nitrogen removal are enhanced, and the denitrification effect of the vertical flow artificial wetland is greatly improved.
Description
Technical field
The invention belongs to environmental engineering technical field of sewage, be specifically related to a kind of vertical current artificial wetland oxygenation denitrification system of periodic running, be applicable to the process of sanitary sewage, source, face sewage, polluted surface water and high-concentration ammonia nitrogenous wastewater.
Background technology
Under the background that body eutrophication is on the rise, the improvement of water surrounding polluted by nitrogen and stain disease denitrogenation processing become the study hotspot of current water treatment field.Artificial swamp, as the water technology of a kind of ecology, low cost, has been widely used in the denitrogenation processing of stain disease at home and abroad at present.There is multiple Nitrogen Removal Mechanism in artificial swamp, wherein microorganism nitrated/denitrification is generally considered topmost Nitrogen Removal Mechanism, in wetland, the removal of nitrogen is carried out in two steps: the first step is that ammonia oxidation becomes nitre nitrogen, i.e. nitrification; Second step is that nitre nitrogen is reduced into N2O or N2, i.e. denitrification.Nitrification is aerobic processes, has come primarily of nitrite bacteria and nitrobacteria; Denitrification process has then been come by denitrifying bacterium under anoxic conditions.The reoxygenation effect of general artificial swamp implants and air is more weak, and in system, entirety is anaerobism usually, and single oxygen environment causes biological denitrification process in wetland not smooth.Therefore, need research how to strengthen the nitrated and denitrification process of wetland simultaneously, thus ensure the unimpeded of this important denitrogenation mechanism of wetland nitrification and denitrification.
Current main research concentrates on how to utilize oxygenation measure reinforcement wetland nitrification, thus improves wetland denitrification effect.The oxygenation way of artificial swamp mainly contains and arranges ventpipe and power oxygenation two kinds of modes, and these two kinds of oxygenation ways all have following deficiency: 1. ventpipe is air gravity flow ventilation, and transfer of air efficiency is not high.2. utilize air compressor to carry out strengthening ventilation to the tube having holes in wet land system continuously or intermittently, high cost, too increases the supporting initial cost of wet land system.In addition, these two kinds of oxygenation ways are all directly be embedded in the matrix of wet land system by perforate ventpipe, tiny grit very easily blocks the perforate of ventpipe, and two kinds of oxygenation ways just consider enhancing wetland nitrification, but truly the nitrogen in sewage is not removed from water body, and denitrification is only nitrogen cycling of elements the most at last becomes N
2o or N
2discharge water body.
Summary of the invention
To be solved by this invention is that existing oxygenation denitrification system transfer of air efficiency is high and cannot thoroughly by technical problem that the nitrogen in sewage removes from water body.
In order to solve the problem, the invention provides a kind of vertical current artificial wetland oxygenation denitrification system of periodic running, comprise the automatic aeration system be connected with water inlet manifold by water pump, it is characterized in that, described automatic aeration system comprises the spray water distributor with atomizer be connected with water pump, and the part of horizontal that spray water distributor is provided with atomizer is located at above vertical current constructed wetland; Equally distributed vertically arranged Multi-hole air filling pipe and denitrification vapor pipe is provided with in vertical current constructed wetland; The bottom of vertical current constructed wetland is connected with outfall sewer.
Preferably, described spray water distributor is by being responsible for and forming from being responsible for the parallel arm that extends, and atomizer to be located on arm and upwards to be arranged, forms oxygen enrichment intake from the water of atomizer ejection and atmosphere; Distance between adjacent arm is 20 ~ 25cm; The diameter of atomizer is 15 ~ 20mm, and under atomizing state, area coverage is 0.5 ~ 4.0m, and discharge is 30 ~ 215L/H, and the distance between adjacent atomizer is 10 ~ 15cm.
Preferably, described vertical current constructed wetland forms by tectum from top to bottom, filter material layer, layer of displacement and impervious barrier are laminating, and outfall sewer is communicated with layer of displacement; The bottom of Multi-hole air filling pipe is located in filter material layer, Multi-hole air filling pipe is automatically filled with oxygen by barometric point in the draining of vertical current constructed wetland, oxygen upwards enters by tectum and the laminating denitrification space of filter material layer along Multi-hole air filling pipe, is denitrification space oxygen supply; Pore on denitrification vapor pipe is located at end section, if leachy pipeline section is located in layer of displacement, the denitrification gaseous volatilization that layer of displacement produces enters in denitrification vapor pipe, discharges from denitrification vapor pipe top.
Preferably, plant in described vertical current constructed wetland and be implanted with wetland plant, the planting density of wetland plant is 2 ~ 3 strains/m
2.
Preferably, described wetland plant is any one or a few in calamus, aquatic Canna generalis Bailey and cattail.
Preferably, described layer of displacement adopts gravel gravel bed system; Described impervious barrier adopts impervious concrete.
Preferably, the distribution density of described Multi-hole air filling pipe is 1 ~ 2/m
2, on Multi-hole air filling pipe, the aperture of aeration aperture is 5 ~ 7mm, and pitch of holes is 5 ~ 10mm, and pipe outer wall is coated with gauze.
Preferably, the distribution density of described denitrification vapor pipe is 1 ~ 2/m
2, on denitrification vapor pipe, the aperture of pore is 5 ~ 7mm, and pitch of holes is 5 ~ 10mm, and pore section pipe outer wall is enclosed with gauze.
Preferably, the part that described denitrification vapor pipe exposes from vertical current constructed wetland is provided with switch.
Preferably, described vertical current constructed wetland adopts periodic running; During water inlet, outfall sewer cuts out, denitrification vapor pipe upper end switch opens, and the denitrification gas that layer of displacement produces is discharged from denitrification vapor pipe upper orifice, and current enter in denitrification vapor pipe simultaneously; During draining, water inlet manifold is closed, and on denitrification vapor pipe, end switch is closed, when Vertical Flow Constructed Wetland Systems water level is lower than position of opening bottom vapor pipe, let out under its water flow inside and again enter in layer of displacement, the replenish air that vapor pipe top is entered by tapping at the bottom of pipe.
The present invention compensate for the deficiency existing for prior art, the vertical current artificial wetland oxygenation denitrification system structure of a kind of periodic running provided is simple, utilize one group of Multi-hole air filling pipe vertically inserting artificial swamp, automatically oxygen is filled with by barometric point, for denitrification space, wetland middle and upper part provides oxygen-enriched environment in vertical current constructed wetland drainage procedure.Increase water inlet and atmosphere time and area by the spray water distributor of one group of upwards perforate, form oxygen enrichment water inlet, strengthen wetland nitrated denitrogenation; In addition, by end switch on manipulation denitrification vapor pipe, the denitrification gas in denitrification region, bottom can be discharged when intaking fast, strengthening wetland denitrification denitrogenation, and by strengthening the nitrated and denitrification denitrogenation process of wetland simultaneously, substantially increase the effect of vertical current constructed wetland denitrogenation.
Compared with prior art, beneficial effect of the present invention is:
1. the present invention utilizes one group of Multi-hole air filling pipe vertically inserting artificial swamp, is realized the effect of automatic oxygenation in the draining of vertical current constructed wetland by barometric point, for denitrification space, wetland middle and upper part provides oxygen-enriched environment; Meanwhile, utilize level frame to be located at spray water distributor above substrate of vertical-flow constructed wetlands layer, increase water inlet and atmosphere time and area by the mode of upward spraying water distribution, form oxygen enrichment water inlet, strengthen the nitrated denitrogenation of wetland; This automatic aeration system structure is simple, making and installation convenient, and not easily causes perforate blocking on water distributor.
2. the denitrification vapor pipe of the present invention's use, structure is simple, making and installation is convenient, by end switch on manipulation denitrification vapor pipe, can discharge the denitrification gas in denitrification region, bottom fast, strengthening wetland denitrification denitrogenation when intaking.
3. the present invention is by application Multi-hole air filling pipe, upward spraying water distributor and denitrification vapor pipe, achieves and strengthens the nitrated and denitrification denitrogenation process of wetland simultaneously, thus ensure the unimpeded of this important denitrogenation mechanism of wetland nitrification and denitrification.
Accompanying drawing explanation
Fig. 1 is the structural representation of the vertical current artificial wetland oxygenation denitrification system of a kind of periodic running provided by the invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the structural representation of denitrification airway;
Fig. 4 is the structural representation of Multi-hole air filling pipe.
Embodiment
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
As Figure 1-4, the structural representation of the vertical current artificial wetland oxygenation denitrification system of a kind of periodic running provided for the utility model, comprise the automatic aeration system be connected with water inlet manifold 1 by water pump 2, it is characterized in that, described automatic aeration system comprises the spray water distributor 3 with atomizer 6 be connected with water pump 2, and the part of horizontal that spray water distributor 3 is provided with atomizer 6 is located at above vertical current constructed wetland 12; Spray water distributor 3 is by being responsible for and forming from being responsible for the parallel arm extended, atomizer 6 to be located on arm and upwards to be arranged, the water sprayed from atomizer 6 and atmosphere form oxygen enrichment and intake, the mode of upward spraying water distribution increases water inlet and atmosphere time and area, strengthens the nitrated denitrogenation of wetland; Distance between adjacent arm is 20 ~ 25cm; The diameter of atomizer 6 is 15 ~ 20mm, and under atomizing state, area coverage is 0.5 ~ 4.0m, and discharge is 30 ~ 215L/H, and the distance between adjacent atomizer 6 is 10 ~ 15cm.
Vertical current constructed wetland 12 is by tectum 8 from top to bottom, filter material layer 9, layer of displacement 10 and impervious barrier 11 is laminating forms, and outfall sewer 13 is communicated with layer of displacement 10.Equally distributed vertically arranged Multi-hole air filling pipe 4 and denitrification vapor pipe 5 is provided with in vertical current constructed wetland 12.The bottom of Multi-hole air filling pipe 4 is inserted in filter material layer 9, Multi-hole air filling pipe 4 is automatically filled with oxygen by barometric point in the draining of vertical current constructed wetland 12, oxygen enters by tectum 8 and the laminating denitrification space of filter material layer 9 along Multi-hole air filling pipe 4, is denitrification space oxygen supply; Pore on denitrification vapor pipe 5 is located at end section, if leachy pipeline section is located in layer of displacement 10, the denitrification gaseous volatilization that layer of displacement 10 produces enters in denitrification vapor pipe 5, discharges from denitrification vapor pipe 5 top.Plant in vertical current constructed wetland 12 and be implanted with wetland plant 7.Wetland plant 7 can adopt in calamus, aquatic Canna generalis Bailey and cattail any one or a few.Layer of displacement 10 adopts gravel gravel bed system; Impervious barrier 11 adopts impervious concrete.
As shown in Figure 4, the distribution density of Multi-hole air filling pipe 4 is 1 ~ 2/m
2, on Multi-hole air filling pipe 4, the aperture of aeration aperture is 5 ~ 7mm, and pitch of holes is 5 ~ 10mm, and pipe outer wall is coated with gauze.
As shown in Figure 3, the distribution density of denitrification vapor pipe 5 is 1 ~ 2/m
2, on denitrification vapor pipe 5, the aperture of pore is 5 ~ 7mm, and pitch of holes is 5 ~ 10mm, and pore section pipe outer wall is enclosed with gauze.The pipeline section that denitrification vapor pipe 5 exposes from vertical current constructed wetland 12 installs a switch.
Sewage imports vertical current constructed wetland 12 by water inlet manifold 1 by water pump 2, carries out water distribution by the spray water distributor 3 be erected at above vertical current constructed wetland 12 tectum 8; Vertical current constructed wetland 12 adopts periodic running; During water inlet, outfall sewer 13 cuts out, denitrification vapor pipe 5 upper end switch opens, and the denitrification gas that layer of displacement 10 produces is discharged from denitrification vapor pipe 5 upper orifice, and current enter in denitrification vapor pipe 5 simultaneously; During draining, water inlet manifold 1 is closed, and on denitrification vapor pipe 5, end switch is closed, when vertical current constructed wetland 12 systematic water level is lower than position of opening bottom vapor pipe 5, let out under its water flow inside and again enter in layer of displacement 10, the replenish air that vapor pipe 5 top is entered by tapping at the bottom of pipe.
The utility model enters in denitrification vapor pipe 5 by the denitrification gaseous volatilization that regulator control system water level and hydraulic pressure make bottom discharge layer 10 produce, utilize the switch on denitrification vapor pipe 5 top to discharge denitrification gas fast within the next cycle of operation, strengthen wetland denitrification denitrogenation.
Embodiment 1
Vertical current constructed wetland 12 is of a size of: length × wide × height=2m × 1m × 1m.Plant in vertical current constructed wetland 12 and be implanted with the aquatic Canna generalis Bailey of 6 strain wetland plant 7.Spray water distributor 3 above vertical current constructed wetland 12 is provided with 6 arms, distance between adjacent arm is 20cm, every root arm is provided with the atomizer 6 that 5 diameters are 15mm, distance between adjacent atomizer 6 is 15cm, atomizer 6 is copper 4 points of adjustable atomizers, purchased from Zhuji grass graden machine factory.Arrange 4 denitrification vapor pipes 5 and 4 porous oxygenation pipes 4 in vertical current constructed wetland 12 altogether, on denitrification vapor pipe 5, the aperture of pore is 5mm, and pitch of holes is 7mm, and pore section pipe outer wall is enclosed with gauze.The pipeline section that denitrification vapor pipe 5 exposes from vertical current constructed wetland 12 installs a switch.On Multi-hole air filling pipe 4, the aperture of aeration aperture is 5mm, and pitch of holes is 7mm, and pipe outer wall is coated with gauze.Water inlet NH
4 +-N concentration is 10 ~ 20mg/L, NO
3 --N concentration is 10 ~ 20mg/L, TN concentration is 25 ~ 40mg/L, measurement result NH
4 +-N, NO
3 -the average removal rate of-N, TN is 85.0%, 98.0%, 86.0%.Water outlet ammonia nitrogen and total nitrogen concentration reach urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level emission standard A, and system denitrification ability improves nearly one times than conventional vertical artificial wetland.
Embodiment 2
Vertical current constructed wetland 12 is of a size of: length × wide × height=6m × 3m × 2m.Plant in vertical current constructed wetland 12 and be implanted with the aquatic Canna generalis Bailey of 36 strain wetland plant 7.Spray water distributor 3 above vertical current constructed wetland 12 is provided with 20 arms, distance between adjacent arm is 20cm, every root arm is provided with the atomizer 6 that 15 diameters are 20mm, distance between adjacent atomizer 6 is 15cm, atomizer 6 is copper 4 points of adjustable atomizers, purchased from Zhuji grass graden machine factory.Arrange 18 denitrification vapor pipes 5 and 18 porous oxygenation pipes 4 in vertical current constructed wetland 12 altogether, on denitrification vapor pipe 5, the aperture of pore is 7mm, and pitch of holes is 9mm, and pore section pipe outer wall is enclosed with gauze.The pipeline section that denitrification vapor pipe 5 exposes from vertical current constructed wetland 12 installs a switch.On Multi-hole air filling pipe 4, the aperture of aeration aperture is 7mm, and pitch of holes is 9mm, and pipe outer wall is coated with gauze.Water inlet NH
4 +-N concentration is 30 ~ 38mg/L, NO
3 --N concentration is 10 ~ 20mg/L, TN concentration is 45 ~ 60mg/L, measurement result NH
4 +-N, NO
3 -the average removal rate of-N, TN is 87.0%, 96.0%, 90.0%.Water outlet ammonia nitrogen and total nitrogen concentration reach urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level emission standard A, and system denitrification ability improves nearly one times than conventional vertical artificial wetland.
Claims (10)
1. the vertical current artificial wetland oxygenation denitrification system of a periodic running, comprise the automatic aeration system be connected with water inlet manifold (1) by water pump (2), it is characterized in that, described automatic aeration system comprises the spray water distributor (3) with atomizer (6) be connected with water pump (2), and the part of horizontal that spray water distributor (3) is provided with atomizer (6) is located at vertical current constructed wetland (12) top; Equally distributed vertically arranged Multi-hole air filling pipe (4) and denitrification vapor pipe (5) is provided with in vertical current constructed wetland (12); The bottom of vertical current constructed wetland (12) is connected with outfall sewer (13); Described spray water distributor (3) is by being responsible for and forming from being responsible for the parallel arm that extends, and atomizer (6) to be located on arm and upwards to be arranged, the water sprayed from atomizer (6) and atmosphere form heavy-oxygen-enriched water.
2. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 1, it is characterized in that, the distance between adjacent arm is 20 ~ 25cm; The diameter of atomizer (6) is 15 ~ 20mm, and under atomizing state, area coverage is 0.5 ~ 4.0m, and discharge is 30 ~ 215L/H, and the distance between adjacent atomizer (6) is 10 ~ 15cm.
3. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 1, it is characterized in that, described vertical current constructed wetland (12) is by tectum (8) from top to bottom, filter material layer (9), layer of displacement (10) and impervious barrier (11) is laminating forms, and outfall sewer (13) is communicated with layer of displacement (10); The bottom of Multi-hole air filling pipe (4) is located in filter material layer (9), Multi-hole air filling pipe (4) is automatically filled with oxygen by barometric point in the draining of vertical current constructed wetland (12), oxygen upwards enters in tectum (8) and the laminating denitrification space of filter material layer (9) along Multi-hole air filling pipe (4), is denitrification space oxygen supply; Pore on denitrification vapor pipe (5) is located at end section, if leachy pipeline section is located in layer of displacement (10), the denitrification gaseous volatilization that layer of displacement (10) produces enters in denitrification vapor pipe (5), discharges from denitrification vapor pipe (5) top.
4. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 3, is characterized in that, plants and be implanted with wetland plant (7) in described vertical current constructed wetland (12).
5. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 4, is characterized in that, described wetland plant (7) is calamus, any one or a few in aquatic Canna generalis Bailey and cattail.
6. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 3, is characterized in that, described layer of displacement (10) adopts gravel gravel bed system; Described impervious barrier (11) adopts impervious concrete.
7. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 3, it is characterized in that, the distribution density of described Multi-hole air filling pipe (4) is 1 ~ 2/m
2, the aperture of the upper aeration aperture of Multi-hole air filling pipe (4) is 5 ~ 7mm, and pitch of holes is 5 ~ 10mm, and pipe outer wall is coated with gauze.
8. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 3, it is characterized in that, the distribution density of described denitrification vapor pipe (5) is 1 ~ 2/m
2, the aperture of the upper pore of denitrification vapor pipe (5) is 5 ~ 7mm, and pitch of holes is 5 ~ 10mm, and pore section pipe outer wall is enclosed with gauze.
9. as the vertical current artificial wetland oxygenation denitrification system of the periodic running in claim 1-8 as described in any one, it is characterized in that, the part that described denitrification vapor pipe (5) is exposed from vertical current constructed wetland (12) is provided with switch.
10. the vertical current artificial wetland oxygenation denitrification system of periodic running as claimed in claim 9, is characterized in that, described vertical current constructed wetland (12) adopts periodic running; During water inlet, outfall sewer (13) cuts out, denitrification vapor pipe (5) upper end switch opens, and the denitrification gas that layer of displacement (10) produces is discharged from denitrification vapor pipe (5) upper orifice, and current enter in denitrification vapor pipe (5) simultaneously; During draining, water inlet manifold (1) is closed, the upper end switch of denitrification vapor pipe (5) is closed, when vertical current constructed wetland (12) systematic water level lower than vapor pipe (5) bottom position of opening time, let out under its water flow inside and again enter in layer of displacement (10), the replenish air that vapor pipe (5) top is entered by tapping at the bottom of pipe.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105668796B (en) * | 2016-01-18 | 2018-07-13 | 马鞍山市三环碧源水处理工程有限公司 | A kind of gravity flow oxygen therapy biofilter |
| CN107285488A (en) * | 2017-08-24 | 2017-10-24 | 环境保护部南京环境科学研究所 | A kind of device and application method that black-odor riverway is administered using intensive aeration artificial swamp coupling technique dystopy |
| CN108706738A (en) * | 2018-07-12 | 2018-10-26 | 东华大学 | A kind of high efficient block vertical flow artificial wetland sewage treatment system |
| CN109748397A (en) * | 2019-02-21 | 2019-05-14 | 中国电建集团华东勘测设计研究院有限公司 | Low-temperature region artificial wet land system |
| CN114835333A (en) * | 2022-03-02 | 2022-08-02 | 武汉大学 | Automatic oxygenation type constructed wetland system |
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| CN1792883A (en) * | 2005-11-01 | 2006-06-28 | 南京大学 | Automatic aeration system for underflow type artificial wet land |
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| CN203683233U (en) * | 2014-01-03 | 2014-07-02 | 东华大学 | Intermittently-operated oxygen aeration and denitrification system for vertical flow constructed wetland |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6881338B2 (en) * | 2002-06-17 | 2005-04-19 | Dharma Living Systems, Inc. | Integrated tidal wastewater treatment system and method |
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|---|---|---|---|---|
| CN1792883A (en) * | 2005-11-01 | 2006-06-28 | 南京大学 | Automatic aeration system for underflow type artificial wet land |
| CN102249496A (en) * | 2011-06-28 | 2011-11-23 | 深圳市碧园环保技术有限公司 | Method for advanced treatment of sewage and artificial wetland structure |
| CN203683233U (en) * | 2014-01-03 | 2014-07-02 | 东华大学 | Intermittently-operated oxygen aeration and denitrification system for vertical flow constructed wetland |
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