CN102092855B - Cyclic enhanced denitrification double-inlet type constructed wetland device - Google Patents
Cyclic enhanced denitrification double-inlet type constructed wetland device Download PDFInfo
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- CN102092855B CN102092855B CN2010105882344A CN201010588234A CN102092855B CN 102092855 B CN102092855 B CN 102092855B CN 2010105882344 A CN2010105882344 A CN 2010105882344A CN 201010588234 A CN201010588234 A CN 201010588234A CN 102092855 B CN102092855 B CN 102092855B
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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 cyclic enhanced denitrification double-inlet type constructed wetland device. The constructed wetland device comprises a high-level water inlet trough, a main water inlet pipe and a water outlet pipe, wherein the high-level water inlet trough is connected with the main water inlet pipe; the main water inlet pipe is connected with a main water inlet valve and a middle layer water inlet pipe respectively through a three-way joint and extends in a constructed wetland, the middle of the main water inlet pipe is provided with the main water inlet valve; the middle layer water inlet pipe extends in the constructed wetland, the middle of the middle layer water inlet pipe is provided with a middle layer water inlet pipe valve; the water outlet pipe is lead out of the constructed wetland, the middle of the water outlet pipe is provided with a water outlet pipe valve, the outlet end of the water outlet pipe leads to an effluent collecting pond; one end of an effluent circulating pipe extends in the constructed wetland, the middle of the effluent circulating pipe is provided with an effluent circulating pipe valve, and the other end of the effluent circulating pipe is connected with an effluent circulating pump; and the effluent circulating pump extends in the effluent collecting pond. The constructed wetland device in the invention has a simple structure and is convenient to use; and the result of continuous water quality monitoring shows that the total nitrogen removal rate of the device can reach more than 90%.
Description
Technical field
The invention belongs to technical field of sewage; More specifically relate to the two water inlet of a kind of circulation strengthened denitrification constructed wetland device; Be applicable to the processing of the landscape water that treat effluent is had relatively high expectations, the processing of the advanced treatment of high nitrogenous effluent and dispersant type domestic wastewater in the trade effluent.
Background technology
Point out that the horizontal drowned flow wetland is to organism (BOD in the handbook that the wetland that EPA 1993 publishes is disposed of sewage
5) and suspended solid good removal effect is arranged, can reach three grades of water outlet requirements.But the clearance to nitrogen is very low.In the research in the fish and water pond, Hangzhou Botanical Garden Yuquan Taoist Temple, wetland is merely 12% to the clearance of nitrogen.Shatian, Shenzhen artificial swamp is mainly used in the processing municipal wastewater, and the average removal rate of its nitrogen is 44.93%, and less with seasonal variation.The natural wetland of the Hidden River Corporate Office park in Florida, US Tampa city is handled the system of urban rainwater, and the average removal rate of TN is reached 46%.。NH is found in 268 the artificial swamp investigation in Europe
3The average removal rate of-N is merely 30%, and the average removal rate of TN is 39.6%.Many scholars and engineering staff have to strengthen the design area of wetland in order to improve the removal efficient of nitrogen and phosphorus, to guarantee the removal efficient of nitrogen.So not only waste the soil, but also limited the large-scale promotion of artificial swamp technology.
Summary of the invention
The objective of the invention is to be to provide the two water inlet of a kind of circulation strengthened denitrification constructed wetland device, simple in structure, easy to use; Fully utilized the removal ability of wetland different zones to different pollutents; Be provided with double-deck water inlet and go out water circulation system, realizing to total phosphorus, when the clearance of BOD, these several kinds of pollutents of COD is up to standard; Strengthen the ability of artificial swamp removal total nitrogen, solved conventional artificial swamp nitrogen removal rate phenomenon not up to standard.The WQM result shows that nitrogen removal rate of the present invention can reach more than 90% continuously.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
The two water inlet of a kind of circulation strengthened denitrification constructed wetland device comprises high-order inlet flume, main water inlet tube, main water inlet tube valve, middle level water inlet pipe, middle level water inlet pipe valve, goes out water-circulating pipe, water outlet circulation tube valve, rising pipe, rising pipe valve, water outlet water collecting basin, goes out water-circulating pump.
Its annexation is: high-order inlet flume is connected with main water inlet tube, and main water inlet tube connects main water inlet tube valve and middle level water inlet pipe respectively through threeway, and main water inlet tube stretches in the artificial swamp; In the middle of the main water inlet tube main water inlet tube valve is set, the middle level water inlet pipe stretches in the artificial swamp, and middle level water inlet pipe valve is set in the middle of the water inlet pipe of middle level; Rising pipe is imbedded artificial swamp, and rising pipe is drawn in artificial swamp, sets out aqueduct valve in the middle of the rising pipe; Rising pipe links to each other with the water outlet water collecting basin, and the rising pipe exit end is introduced the water outlet water collecting basin, goes out water-circulating pipe one end and stretches in the artificial swamp; Going out the water-circulating pipe the other end links to each other with water outlet circulation tube valve; Water outlet circulation tube valve one end with go out water-circulating pump and be connected, go out water-circulating pump and link to each other with the water outlet water collecting basin, go out water-circulating pump and stretch in the water outlet water collecting basin;
The amount of disposing of sewage with artificial swamp design area ratio is: handle 1m
3Sewage, need 12m
2The artificial swamp area.
Described middle level water inlet pipe is 0.45m apart from artificial swamp filler top.
Going out water-circulating pipe is 0.7m apart from artificial swamp filler top.
The water outlet water collecting basin is 1.35m deeply.
Main water inlet tube and middle level water inlet pipe are the U-pvc pipe of DN100; When main water inlet tube valve and middle level water inlet pipe valve complete opening; The main water inlet tube flow is 1:1 with middle level water inlet pipe flooding velocity ratio; Main inlet valve and middle level water inlet pipe valve size all can be regulated, and with the throughput ratio of control main water inlet tube and middle level water inlet pipe, the throughput ratio scope is confirmed between 1:1 ~ 5:1.
The peak flow that goes out water-circulating pump is typically chosen in 1/2 of main water inlet tube flow, adjusts the flow of water-circulating pipe through adjusting the water-circulating pipe valve, and main water inlet tube and the ratio scope that goes out the flow of water-circulating pipe are between 2:1 ~ 5:1.
Principle of work of the present invention is following:
1. the present invention has developed the two water inlet of a kind of circulation strengthened denitrification artificial wet land system; Studied the denitrification microorganism ammonifying bacteria, the spatial-temporal distribution characteristic of nitrococcus, denitrifying bacteria; Through the statistical analysis means, analyzed the denitrogenation mechanism under this artificial swamp microbial process, through regular detection to this wetland effluent; Prove that this system has good denitrification effect, exceed than the nitric efficiency of common artificial swamp.
2. sewage flows in the artificial swamp through main water inlet tube from inlet flume, and main water inlet tube is connecting the middle level water inlet pipe simultaneously, and main water inlet tube is equipped with the main water inlet tube valve, and the middle level water inlet pipe is equipped with middle level water inlet pipe valve, and valve is used to control the water distribution layer and the flow of water inlet.Rising pipe is positioned at the bottom in artificial wet land system pond, enters in the water outlet water collecting basin after water outlet is collected, and valve is housed with the control water outlet on the rising pipe.Go out the top that water-circulating pipe is positioned at rising pipe, link to each other with the water-circulating pump that goes out in the water outlet water collecting basin, rising pipe and go out to be equipped with between the water-circulating pump water outlet circulation tube valve is used for the flow of Control Circulation water.
3. the two water inlet of circulation strengthened denitrification artificial wet land system denitrification microorganism spatial distribution characteristics: near the denitrification microorganism sociales that distribute the main water inlet tube system are ammonifying bacteria and nitrococcus; Near the sociales that distribute the water inlet pipe of middle level are denitrifying bacteria; The denitrification microorganism vertical distribution rule of system be ammonifying bacteria with the nitrococcus upper strata (0 ~ 10cm) greater than middle lower floor (10 ~ 30cml), lower floor is greater than the upper strata in the denitrifying bacteria quantity.
4. the nitric efficiency of the two water inlet of circulation strengthened denitrification artificial swamp is high; It is following in the research process of the present invention: when system's water inlet total nitrogen, ammonia nitrogen, nitrite nitrogen and nitric nitrogen mean concns are respectively 28.5mg/L, 18.6mg/L, 6.35mg/L, 3.55mg/L to the wastewater treatment efficiency of preparation; The water outlet total nitrogen of system, ammonia nitrogen, nitrite nitrogen concentration are respectively 1.85mg/L, 1.05mg/L, 0.58m/L, 0.22mg/L, and clearance is respectively 90.1%, 94.4%, 90.9%, 93.8%.Two water inlets unit at the two water inlet of the circulation strengthened denitrification that makes up artificial swamp artificial wet land system, especially system middle part has promoted current dissolved oxygen condition, has improved system's nitric efficiency.
5. plant influence microbial profile characteristic down: plant to the nitrococcus in main water inlet tube and the middle level water inlet pipe surrounding soil, the influence of denitrifying bacteria distributed quantity significantly, and to the ammonifying bacteria in up pond of vertical current and the undercurrent system, the nitrococcus distributed quantity influences remarkable.Nitrococcus, denitrifying bacteria and ammonifying bacteria distribution situation total nitrogen removed played a decisive role.
The present invention compared with prior art has the following advantages and effect:
1. the present invention is through double-deck water inlet technology, overcome the only uneven problem of water distribution that causes of individual layer water inlet of prior art, and double-deck water inlet simultaneously can make full use of the absorption and the degradation capability of soil different depths, the wet land filler rate of utilization of raising unit surface.As: it is 2000mg/100g soil that the soil of unit volume can adsorb TP, and when identical flooding quantity, traditional wet land system needs 30m approximately
2Area handle 1m
3Sewage (TP≤8mg/L), this Design of processing system only need 12 m
2System's area, be merely 40% of original area, today of growing tension in the soil, it is particularly important that the saving of land resources seems.
2. the design of native system and enforcement can effectively reduce the engineering cost of engineering construction.At first, the enforcement of native system and traditional wet land system relatively increase cost: a, water distribution pipe increase in the following aspects; B, increase valve; But the part that increases cost accounts for 2% of engineering construction total expenses, and engineering minimizing expense has the following aspects: the workload of a, minimizing hand excavation and backfill; B, reduce the land use expense (fees paid for taking rural land, clear seedling takes, land grand fees etc., and then reduced the contradiction of land owner and engineering construction help the masses and more understand the work with the support environment improvement.) c, reduce the quantities of plant growing, reduce the maintenance work amount simultaneously; D, saving job schedule time, the expenditure of two types of expenses of minimizing engineering.The expense that reduces cost accounts for 10% of engineering total expenses, in general, can practice thrift engineering cost about 8% than traditional wet land system.
3. the water distribution system that circulates up and down of native system engineering can satisfy the requirement of frozen soil layer thickness, effectively improves traditional wet land system under north of china in winter frozen soil layer situation, and the awkward situation that is difficult to move helps the recycling in soil and the popularization of technology.
4. effectively improve the denitrification effect of wet land system.A large amount of datas show that traditional wet land system is not more than 65% aspect nitric efficiency; The engineering research data of this process system show, at equal amount of inlet water, and same land use area; Under the condition of same pretreating effect and same filler; This technology nitric efficiency is greater than 90%, and traditional artificial wetland process nitric efficiency is about 60%, demonstrates fully the advance of this technology.
5. this process system is provided with the recycle system of water outlet, and the wet land system that the effect of water outlet is more traditional is more stable.Be to have that detergent power is strong, antipollution load impact power is strong, the artificial wet land system of stable water outlet.Traditional wet land system water outlet is through the direct water outlet of filler, absorption and the disposable completion of filter effect, and duration of contact is shorter relatively, and suspended substance (SS) concentration requirement of influent quality is not more than 100mg/l, and influent quality is had relatively high expectations.This process system adopts circulation two-layer water inlet up and down, can adapt to suspended substance (SS) concentration≤200mg/L, and is lower to the requirement of raw water quality; Reduce the processing cost of pretreatment technology; Extend contact time, in the function that efficiency denitrification and dephosphorization is arranged simultaneously, more can guarantee the stable of effluent quality.
Description of drawings
Fig. 1 is the two water inlet of an a kind of circulation strengthened denitrification constructed wetland device synoptic diagram
Wherein: the high-order inlet flume of 1-, 2-main water inlet tube, 3-main water inlet tube valve, 4-middle level water inlet pipe, 5-middle level water inlet pipe valve, 6-go out water-circulating pipe, 7-water outlet circulation tube valve, 8-rising pipe, 9-rising pipe valve, 10-water outlet water collecting basin, 11-and go out water-circulating pump.
Embodiment
Embodiment 1:
The two water inlet of a kind of circulation strengthened denitrification constructed wetland devices comprise high-order inlet flume 1, main water inlet tube 2, main water inlet tube valve 3, middle level water inlet pipe 4, middle level water inlet pipe valve 5, go out water-circulating pipe 6, water outlet circulation tube valve 7, rising pipe 8, rising pipe valve 9, water outlet water collecting basin 10, go out water-circulating pump 11.
Its annexation is: high-order inlet flume 1 is connected with main water inlet tube 2, and main water inlet tube 2 connects main water inlet tube valve 3 and middle level water inlet pipe 4 respectively through threeway, and main water inlet tube 2 stretches in the artificial swamp; In the middle of the main water inlet tube 2 main water inlet tube valve 3 is set, middle level water inlet pipe 4 stretches in the artificial swamp, and middle level water inlet pipe valve 5 is set in the middle of the middle level water inlet pipe 4; Set out aqueduct valve 9 in the middle of the rising pipe 8; Rising pipe 8 links to each other with water outlet water collecting basin 10, and rising pipe 8 is imbedded artificial swamp, and rising pipe 8 exit end are introduced water outlet water collecting basin 10; Going out water-circulating pipe 6 one ends stretches in the artificial swamp; Go out water-circulating pipe 6 the other ends and link to each other with water outlet circulation tube valve 7, water outlet circulation tube valve 7 the other ends connect water-circulating pump 11, go out water-circulating pump 11 and stretch in the water outlet water collecting basin 10.
The amount of disposing of sewage with artificial swamp design area ratio is: handle 1m
3Sewage, need 12m
2The artificial swamp area.
Middle level water inlet pipe 4 is 0.45m apart from artificial swamp filler top.
Going out water-circulating pipe 6 is 0.7m apart from artificial swamp filler top.
Water outlet water collecting basin 10 is 1.35m deeply.
Main water inlet tube 2 is managed with the U-pvc that middle level water inlet pipe 4 is DN100; When main water inlet tube valve 5 and middle level water inlet pipe valve 5 complete openings; Main water inlet tube 2 flows are 1:1 with middle level water inlet pipe 4 flooding velocity ratio; Main inlet valve 3 all can be regulated with middle level water inlet pipe valve 5 sizes, and with the throughput ratio of control main water inlet tube 2 with middle level water inlet pipe 4, the throughput ratio scope is confirmed between 1:1 ~ 5:1.
The peak flow that goes out water-circulating pump 11 is typically chosen in 1/2 of main water inlet tube 2 flows, adjusts the flow of water-circulating pipe 6 through adjusting water-circulating pipe valve 7, and main water inlet tube 2 and the ratio scope that goes out the flow of water-circulating pipe 6 are between 2:1 ~ 5:1.
Waste water gets into the two water inlet of ring strengthened denitrification artificial wet land system through main water inlet tube 2 and middle level water inlet pipe 4, and the water of the different water yields is evenly distributed on the different heights of wetland.After the processing of over-wet land, sewage flows into water outlet water collecting basin 10 through rising pipe 8.Part of contaminated water is squeezed into out water-circulating pipe and is carried out further advanced treatment through going out water-circulating pump.
Embodiment 2
According to a specific examples of invention, the two water inlet of circulation strengthened denitrification artificial swamp is built in by the sub-district of not including city planting ductwork in, and the water yield of sub-district is 100m
3/ d.
It is 100 * 12=1200m that the area of the two water inlet of circulation strengthened denitrification artificial swamp requires according to invention
2Wetland is long to be 200m, and wide is 60m.Clay compacting antiseepage is taked in the wetland bottom, and the pond body structure is a brick mix structure.
The main water inlet tube flow is 100m
3/ d, middle level water inlet pipe flow is adjusted to 25 m
3/ d, the throughput ratio of main water inlet tube and middle level water inlet pipe is 4:1.The design discharge of recycle pump is 50 m
3/ d, the regulating that goes out in the water-circulating pipe is 20m
3/ d, main water inlet tube is 5:1 with the throughput ratio that goes out water-circulating pipe.
Waste water gets into the two water inlet of ring strengthened denitrification artificial wet land system through main water inlet tube (2) and middle level water inlet pipe (4), and the water of the different water yields is evenly distributed on the different heights of wetland.After the processing of over-wet land, sewage flows into water outlet water collecting basin (9) through rising pipe (8).Part of contaminated water is squeezed into out water-circulating pipe and is carried out further advanced treatment through going out water-circulating pump, and waste water has 90% pollutent to be removed after treatment approximately.
Embodiment 3
Demonstration area, east, Chaohu artificial swamp engineering, this engineering adopt the two water inlet of circulation strengthened denitrification artificial wetland process, and the eutrophication water in Chaohu is handled, and handle water yield 30m
3/ d, wetland area are 360m
3/ d, long 30m, wide 12m.Clay compacting antiseepage is taked in the wetland bottom, and the pond body structure is a brick mix structure.
The main water inlet tube flow is 30m
3/ d, middle level water inlet pipe flow is adjusted to 6 m
3/ d, the throughput ratio of main water inlet tube and middle level water inlet pipe is 5:1.The design discharge of recycle pump is 15 m
3/ d, the regulating that goes out in the water-circulating pipe is 10m
3/ d, main water inlet tube is 3:1 with the throughput ratio that goes out water-circulating pipe.
Each water-quality guideline is following in water inlet of this engineering and the water outlet:
| The pollutent index | Water inlet content (mg/L) | Go out water-content (mg/L) | Clearance (%) |
| Permanganate index | 15.08 | 2.11 | 86.0 |
| Total phosphorus | 3.25 | 0.05 | 98.5 |
| Total nitrogen | 2.3 | 0.19 | 91.7 |
| Nitric nitrogen | 0.56 | 0.02 | 96.4 |
| Nitrite nitrogen | 0.24 | 0.02 | 91.7 |
| Ammonia nitrogen | 1.5 | 0.15 | 90 |
| COD | 42.64 | 3.85 | 91 |
| Five-day BOD | 12.58 | 1.27 | 90 |
Water quality data according to monitoring can know that this technology is good to the treatment effect of enriched surface water, and the clearance of total nitrogen can reach 91.7%, and nitric nitrogen, nitrite nitrogen, ammonia-N removal rate can reach 96.4%, 91.7%, 90% respectively.Clearance to other pollutents also can reach more than 86%.
Claims (6)
1. the two water inlet of a circulation strengthened denitrification constructed wetland device comprises high-order inlet flume (1), main water inlet tube (2), rising pipe (8), it is characterized in that:
High-order inlet flume (1) is connected with main water inlet tube (2), and main water inlet tube (2) connects main water inlet tube valve (3) and middle level water inlet pipe (4) respectively through threeway, and main water inlet tube (2) stretches in the artificial swamp; In the middle of the main water inlet tube (2) main water inlet tube valve (3) is set, middle level water inlet pipe (4) stretches in the artificial swamp, and middle level water inlet pipe valve (5) is set in the middle of the middle level water inlet pipe (4); Set out aqueduct valve (9) in the middle of the rising pipe (8); Rising pipe (8) links to each other with water outlet water collecting basin (10), and rising pipe (8) is imbedded artificial swamp, and rising pipe (8) exit end is introduced water outlet water collecting basin (10); Going out water-circulating pipe (6) one ends stretches in the artificial swamp; Go out water-circulating pipe (6) the other end and link to each other with water outlet circulation tube valve (7), water outlet circulation tube valve (7) the other end connects water-circulating pump (11), goes out water-circulating pump (11) and stretches in the water outlet water collecting basin (10).
2. the two water inlet of a kind of circulation strengthened denitrification as claimed in claim 1 constructed wetland device, it is characterized in that: described middle level water inlet pipe (4) is 0.45m apart from artificial swamp filler top.
3. the two water inlet of a kind of circulation strengthened denitrification as claimed in claim 1 constructed wetland devices is characterized in that: described to go out water-circulating pipe (6) be 0.7m apart from artificial swamp filler top.
4. the two water inlet of a kind of circulation strengthened denitrification as claimed in claim 1 constructed wetland device is characterized in that: described water outlet water collecting basin (10) is 1.35m deeply.
5. the two water inlet of a kind of circulation strengthened denitrification as claimed in claim 1 constructed wetland device, it is characterized in that: described main water inlet tube (2) and middle level water inlet pipe (4) flooding velocity are between 1: 1～5: 1 than scope.
6. the two water inlet of a kind of circulation strengthened denitrification as claimed in claim 1 constructed wetland devices is characterized in that: described main water inlet tube (2) and to go out water-circulating pipe (6) throughput ratio scope be between 2: 1～5: 1.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418426B (en) * | 2011-08-23 | 2013-08-14 | 哈尔滨工业大学 | Double-layer undercurrent artificial wetland landscape pond and method thereof for recovering and treating urban roof rainwater |
| CN103214095A (en) * | 2013-04-24 | 2013-07-24 | 中国林业科学研究院林业新技术研究所 | Indoor minitype full-automatic subsurface wetland simulation test device |
| CN103864228B (en) * | 2014-03-21 | 2015-04-08 | 中国环境科学研究院 | Minimally invasive excavated multimedium underground percolating in-situ recharge underground water treatment device |
| CN106186345A (en) * | 2016-08-31 | 2016-12-07 | 鑫源鑫（北京）水利工程有限公司 | Making use of rain and flood bio-decontamination cycle wet land system |
| CN106830336B (en) * | 2017-02-06 | 2020-10-09 | 桂林理工大学 | Circulating artificial wetland sewage treatment analogue means of intaking |
| CN107892441B (en) * | 2017-12-13 | 2018-11-23 | 中国科学院地理科学与资源研究所 | Metal mine water resource recycles middle pollutant catabolic gene device and control method |
| CN111875192A (en) * | 2020-09-02 | 2020-11-03 | 浙江问源环保科技股份有限公司 | Double-channel water inlet composite circulating flow constructed wetland and operation method thereof |
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