CN101177321A - Method for processing sewage in non-clogging highly effective vertical subsurface flow wetland - Google Patents
Method for processing sewage in non-clogging highly effective vertical subsurface flow wetland Download PDFInfo
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- CN101177321A CN101177321A CNA2007101705847A CN200710170584A CN101177321A CN 101177321 A CN101177321 A CN 101177321A CN A2007101705847 A CNA2007101705847 A CN A2007101705847A CN 200710170584 A CN200710170584 A CN 200710170584A CN 101177321 A CN101177321 A CN 101177321A
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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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Abstract
The invention relates to a non-clogging and high-efficiency sewage treatment method with vertical downflow wetlands, which is characterized in that the sewage treatment system comprises wetland plants, a plurality of water distributing main pipes, a plurality of water distributing branch pipes, fine grain size substrates, middle grain size substrates and a plurality of catch-water pipes; the system is operated by means of continuous water feeding, time interval or variable level; wherein the water distributing main pipes and the branch pipes are positioned under the bottom surfaces of the fine grain size substrates; the branch pipes are evenly distributed in part of the wetland plants; the middle grain size substrates with the grain size between 5 mm and 10 mm are arranged under the branch pipes; the catch-water pipes are positioned at the bottom of the middle grain size substrates; the fine grain size substrates are arranged in a long strip shape along the direction of the water distributing branch pipes; the wetland plants are planted on the surfaces of the fine grain size substrates; the sewage seeps downwards along plant roots to form the infiltration flow; the middle grain size substrates are filled among the long strips of the fine grain size substrates and are flush with the surface; the surfaces of the middle grain size substrates are exposed to form a atmospheric reoxygenation corridor; the sewage is sufficiently contacted with the air going in and out through the atmospheric reoxygenation corridor, and is discharged via a water collecting system after the interaction with microorganism, substrates and plant roots. The invention has the advantages of no wetland clogging phenomenon under the condition of high-load water feeding, high-efficiency sewage purification, convenient construction, low cost and simple operation and management.
Description
Technical field
The present invention relates to the sewage disposal ecological engineering technology, belong to environmental technology field, be specifically related to a kind of non-clogging highly effective vertical subsurface flow wetland sewage water treatment method.
Background technology
Constructed wetland waste water treatment technology is a kind of sewage disposal ecological engineering new technology of rising the seventies in 20th century, owing to have advantages such as less investment, energy consumption are low, convenient management, non-secondary pollution, be applied to just gradually vast in the sanitary sewage disposal of samll cities and towns and grass roots.Vertical descending drowned flow artificial wet land (Vertical Subsurface Downflow Wetlands, VSDW) as a type of artificial swamp, its principal feature is: water distribution system is tiled in the wetland top substrate, after sewage is distributed on the wetland horizontal section, sewage evenly flows downward, and water quality is purified in flow process; Water gathering system is tiled in the wetland bottom substrates, collects the sewage that is distributed on the wetland horizontal section, compiles the back and discharges.VSDW has made full use of the space of wetland, has brought into play the synergy between system, makes sewage treatment capacity obtain increasing substantially, and floor space is less relatively, thereby becomes the main flow direction of artificial swamp technical development gradually.
But in actual moving process, often there are two kinds of situations in the type artificial swamp: the VSDW mesostroma porosity of (1) coarse grain footpath matrix is big, and hydraulic detention time is short, makes the microorganism of stromal surface can not effectively remove pollutent.And,, can not effectively guarantee the survival rate of plant if all adopt the type matrix in the vertical subsurface flow wetland because coarse grain footpath matrix water holdup is lower; (2) VSDW of fine grain size matrix is better to the initial stage treatment effect of pollutent, but long-time running along with the type artificial swamp, the final obstruction that all can cause matrix, thereby cause the wet land system permeability coefficient obviously to reduce, the serious Yong Shui of stromal surface causes stench, worsens running environment, simultaneously Yong Shui also blocking oxygen and then reduce the removal effect of pollutent (mainly being organism and ammonia nitrogen etc.) to the hypothallus internal diffusion.
There are some researches show that artificial swamp matrix size distribution has decisive influence to pore size and water capacity, rationally regulate and control the effect that voidage between matrix can produce three aspects: rationally regulate hydraulic detention time, guarantee the water quality effect of water outlet; The growth useful space of root system of plant is provided, increases inflation in the matrix, quicken the DeR of microorganism; Reduce latch up phenomenon, prolong the effective storage life of wet land system.Therefore, VSDW technology exists treatment effect good but easily stop up, do not take place to stop up but problems such as poor processing effect at present, and its basic reason is to fail to select good matrix particle diameter, kind and fail the reasonable Arrangement water distributor.
Summary of the invention
The objective of the invention is to shortcoming, propose a kind of non-clogging highly effective vertical subsurface flow wetland sewage water treatment method at vertical descending current wetland.
For reaching above-mentioned purpose, a kind of non-clogging highly effective vertical subsurface flow wetland sewage water treatment method of the present invention, water distribution system is tiled in the wetland top substrate, sewage is distributed on the wetland horizontal section after, sewage evenly flows downward, and water quality is purified in flow process; Water gathering system is tiled in the wetland bottom substrates, collection is distributed on the sewage of wetland horizontal section, compiling the back discharges, employing is continuous, the mode of falling through is moved, perhaps, adopt change water level mode to move, it forms described Sewage treatment systems by wetland plant, water distribution main pipe, water distribution branch pipe, fine grain size matrix, middle particle diameter matrix and header, wherein:
The first, water distribution main pipe and arm are positioned at below, fine grain size matrix bottom surface, and arm is evenly distributed in the part wetland plant, and the middle particle diameter matrix of 5～10mm is all adopted in the arm below;
The second, header is arranged in the bottom of particle diameter matrix;
The 3rd, the surface plantation wetland plant of fine grain size matrix, fine grain size matrix carries over water distribution branch pipe direction long strip shape and arranges, sewage forms down infiltration stream to lower edge root system of plant seepage flow, be filled to flush by middle particle diameter matrix between each long strip shape fine grain size matrix, the surface exposure of middle particle diameter matrix is as the passage of air reaeration, form the air reaeration gallery, sewage fully contacts with the air that passes in and out by the air reaeration gallery between hole, and and microorganism, matrix and root system of plant effect are after discharged by water gathering system, atmosphere enters each layer matrix and the diffusion of the water body to the cloth pool from air reaeration gallery surface pore by diffusion and convection current, makes matrix, microorganism on the root system all is in nitrated environment.
On the such scheme basis, described fine grain size matrix particle diameter is less than 5mm, and the air reaeration gallery between the fine grain size matrix is made of middle particle diameter matrix, and face width is 200～400mm.
Particle diameter matrix in described, particle size range is 5～10mm, d
10, d
30, d
60And d
50Respectively about 4.00mm, 5.70mm, 7.40mm and 6.80mm.
The thickness of described fine grain size matrix is 100～150mm, and width is 500～1000mm.
Described sewage purification process is finished in middle particle diameter matrix, contains root system of plant and microorganism in the matrix, and the virtual height of wetland is 600～800mm.
Described water distribution main pipe adopts the ring-type mode to arrange that water distribution Zhi Ganguan is positioned under the fine grain size substrate base.
Described wetland plant 1 drought is given birth to or waterplant, comprising: the one or more combination of golden wave, turf, cattail, reed, Canna generalis Bailey, Caulis Miscanthis floriduli, Medulla Junci, parasol grass and giantreed.
Described fine grain size matrix is the tectum of middle particle diameter stromal surface, and tectum adopts soil, sand mixture or gravel and soil mixture.
Particle diameter matrix is a kind of compositions such as blast furnace slag, gravel (broken) stone or coal ash slag in simple grain footpath in described.
The principle of the invention is, form dirty treatment system by water distribution system, wetland plant, matrix and water gathering system, taking continuous water inlet, fall through or become the water level mode moves, the primary process of its sewage disposal is: water distribution system is evenly distributed in part matrix horizontal section by the main pipe range pipe continuously with sewage, the downward seepage flow of sewage, because matrix pores is not full of by water, sewage fully contacts with air by air reaeration gallery turnover between hole, and with microorganism, matrix and root system of plant effect after discharge by water gathering system.In the process of flow, atmosphere enters each layer matrix and the diffusion of the water body to the cloth pool from air reaeration gallery surface pore by diffusion and convection current, makes the microorganism on matrix, the root system all be in nitrated environment; The middle particle diameter matrix of 5～10mm are all adopted in water distribution branch pipe below, and can guarantee effectively that artificial swamp moves under high hydraulic load condition can blockage phenomenon.
Advantage of the present invention is as follows:
1, the artificial swamp latch up phenomenon can not take place in the whole matrix that adopt 5～10mm particle diameter in whole cloth pool in the wetland in operational process;
2, improve air reaeration intensity by middle particle diameter matrix air reaeration gallery, increased the reoxygenation ability of different heights cloth pool sewage in the hypothallus, effectively improved the ammonia nitrogen and the organic matter removal ability of wetland;
3, whole wetland adopts single-matrix substantially, can effectively reduce the construction difficulty and the cost of the type wetland; And the virtual height of wetland has only 600～800mm among the present invention, thereby makes the wetland cost reduce by 20%～30%; Particle diameter matrix 5 can effectively improve the plain removal ability of phosphorus of wetland in employing blast furnace slag or the conduct of coal ash slag.
Matrix obstruction, wetland surface Yong Shui phenomenon can not take place in the non-clogging highly effective vertical subsurface flow wetland sewage water treatment method NVSDW that the present invention proposes in operational process.Pollutents such as organism, ammonia nitrogen and total phosphorus can be efficiently removed in operation under the condition of intaking continuously, fall through; If, can further effectively remove pollutents such as total nitrogen in conjunction with adopting change water level mode to move.The present invention builds conveniently, and with low cost, operational administrative is very simple.
Description of drawings
Fig. 1 is a structural diagrams of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Number in the figure: 1 is wetland plant, and 2 are the water inlet main pipe, and 3 is water distribution Zhi Ganguan, and 4 is fine grain size matrix, 5 is middle particle diameter matrix, and 6 are the water outlet main pipe, and 7 is the air reaeration by matrix pores, and 8 are the stream that seeps water down, I is the air reaeration gallery, and II is the cloth pool, and III is the catchment area.
Embodiment
The invention is further illustrated by the following examples.As Fig. 1 is that structural diagrams of the present invention and Fig. 2 are shown in the vertical view of Fig. 1:
The non-clogging highly effective vertical subsurface flow wetland that the present invention proposes, form by wetland plant 1, water distribution main pipe 2, water distribution branch pipe 3, fine grain size matrix 4, middle particle diameter matrix 5 and header 6, wherein, fine grain size matrix 4 carries over water distribution branch pipe 3 direction long strip shapes and arranges, 4 of each long strip shape fine grain size matrix are filled to flush by middle particle diameter matrix 5; Cloth water conduit tube 2 and arm 3 are positioned at below, matrix 4 bottom surfaces, and header 6 is arranged in the bottom of particle diameter matrix 5, the surface plantation wetland plant 1 of fine grain size matrix 4, and the surface exposure of middle particle diameter matrix 5 is as the passage of air reaeration.
Among the present invention, described fine grain size matrix 4 is the tectum on middle particle diameter matrix 5 surfaces, and tectum adopts soil, sand mixture or gravel and soil mixture.
Among the present invention, middle particle diameter matrix 5 is a kind of compositions such as blast furnace slag, gravel (broken) stone or coal ash slag in simple grain footpath.
In the present embodiment: non-clogging highly effective vertical subsurface flow wetland NVSDW handles city domestic sewage, and as the water inlet of wetland, its chemical oxygen demand (COD) (COD) is 133～310mg/L to former water behind the preliminary sedimentation tank flocculation sediment, and mean value is 225mg/L; Ammonia nitrogen NH
4 +-N) be 13.0～39.7mg/L, mean value is 25.0mg/L; Total nitrogen (TN) is 21.7～41.6mg/L, and mean value is 27.1mg/L; Total phosphorus (TP) is 1.17～2.66mg/L, and mean value is 1.75mg/L; Suspended solids (SS) is 64～192mg/L, and mean value is 113mg/L.NVSDW surface plantation reed, matrix total thickness 800mm, matrix adopts the blast furnace slag (5～10mm) of single particle size.Water distributor center absolute altitude 700mm, header center absolute altitude 50mm, fine grain size matrix width 750mm, air reaeration width of corridor 300mm.If employing is intake continuously, the mode of falling through is moved, be 0.5m at the water inlet hydraulic load
3/ m
2.d under the condition, by the processing of this NVSDW, chemical oxygen demand (COD) average out to 31mg/L in the water outlet, ammonia nitrogen average out to 0.55mg/L, total phosphorus average out to 0.38mg/L, total nitrogen average out to 19.6mg/L reaches among the GB18918-2002 one-level B and puts standard; If adopt change water level mode to move, can make the water outlet total nitrogen be reduced to 13.5mg/L, reach one-level A standard among the GB18918-2002.
Claims (9)
1. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method, water distribution system is tiled in the wetland top substrate, sewage is distributed on the wetland horizontal section after, sewage evenly flows downward, water quality is purified in flow process; Water gathering system is tiled in the wetland bottom substrates, collection is distributed on the sewage of wetland horizontal section, compiling the back discharges, it is characterized in that forming described Sewage treatment systems by wetland plant, water distribution main pipe, water distribution branch pipe, fine grain size matrix, middle particle diameter matrix and header, employing is continuous, the mode of falling through is moved, and perhaps, adopts change water level mode to move, wherein
The first, water distribution main pipe and arm are positioned at below, fine grain size matrix bottom surface, and arm is evenly distributed in the part wetland plant, and the middle particle diameter matrix of 5～10mm is all adopted in the arm below;
The second, header is arranged in the bottom of particle diameter matrix;
The 3rd, fine grain size matrix carries over water distribution branch pipe direction long strip shape and arranges, the surface plantation wetland plant of fine grain size matrix, sewage forms down infiltration stream to lower edge root system of plant seepage flow, be filled to flush by middle particle diameter matrix between each long strip shape fine grain size matrix, the surface exposure of middle particle diameter matrix is as the passage of air reaeration, form the air reaeration gallery, sewage fully contacts with the air that passes in and out by the air reaeration gallery between hole, and and microorganism, matrix and root system of plant effect are after discharged by water gathering system, atmosphere enters each layer matrix and the diffusion of the water body to the cloth pool from air reaeration gallery surface pore by diffusion and convection current, makes matrix, microorganism on the root system all is in nitrated environment.
2. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 1, it is characterized in that, described fine grain size matrix particle diameter is less than 5mm, and the air reaeration gallery between the fine grain size matrix is made of middle particle diameter matrix, and face width is 200～400mm.
3. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 2 is characterized in that, described middle particle diameter matrix particle size range is 5～10mm.
4. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 1 is characterized in that, the thickness of described fine grain size matrix is 100～150mm, and width is 500～1000mm.
5. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 1, it is characterized in that, described sewage purification process is finished in middle particle diameter matrix, contains root system of plant and microorganism in the matrix, and the virtual height of wetland is 600～800mm.
6. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 1 is characterized in that, described water distribution main pipe adopts the ring-type mode to arrange that water distribution Zhi Ganguan is positioned under the fine grain size substrate base.
7. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 1, it is characterized in that, described wetland plant 1 drought is given birth to or waterplant, comprising: the one or more combination of golden wave, turf, cattail, reed, Canna generalis Bailey, Caulis Miscanthis floriduli, Medulla Junci, parasol grass and giantreed.
8. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 1 is characterized in that, described fine grain size matrix is the tectum of middle particle diameter stromal surface, and tectum adopts soil, sand mixture or gravel and soil mixture.
9. non-clogging highly effective vertical subsurface flow wetland sewage water treatment method according to claim 1 is characterized in that, a kind of compositions such as blast furnace slag, gravel (broken) stone or coal ash slag that described middle particle diameter matrix is the simple grain footpath.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101705847A CN101177321B (en) | 2007-11-19 | 2007-11-19 | Method for processing sewage in non-clogging highly effective vertical subsurface flow wetland |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101705847A CN101177321B (en) | 2007-11-19 | 2007-11-19 | Method for processing sewage in non-clogging highly effective vertical subsurface flow wetland |
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| CN101177321A true CN101177321A (en) | 2008-05-14 |
| CN101177321B CN101177321B (en) | 2011-08-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010066A (en) * | 2010-11-12 | 2011-04-13 | 张四海 | Method for purifying sewage in vertical-flow artificial wetland |
| CN102435486A (en) * | 2011-09-01 | 2012-05-02 | 上海市环境科学研究院 | Method for classifying artificial wetland obstructions and extracting components of artificial wetland obstructions |
| CN102992485A (en) * | 2012-08-21 | 2013-03-27 | 南阳市乾景中药材开发有限公司 | Method for treating sewage by constructing artificial wetland with vetiver grass |
| CN103449611A (en) * | 2013-09-17 | 2013-12-18 | 同济大学 | Horizontal subsurface flow artificial wetland treatment device with controllable oxygen supply |
| CN104045163A (en) * | 2014-06-26 | 2014-09-17 | 南京师范大学 | Method for improving artificial wetland sewage treatment performance by using titanium-containing blast furnace slags |
| CN106242059A (en) * | 2016-08-05 | 2016-12-21 | 汪静 | A kind of modularized artificial wetland sewage treatment unit |
| CN114735896A (en) * | 2022-04-25 | 2022-07-12 | 同济大学 | Artificial wetland device and sewage purification method |
-
2007
- 2007-11-19 CN CN2007101705847A patent/CN101177321B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010066A (en) * | 2010-11-12 | 2011-04-13 | 张四海 | Method for purifying sewage in vertical-flow artificial wetland |
| CN102010066B (en) * | 2010-11-12 | 2012-08-22 | 张四海 | Method for purifying sewage in vertical-flow artificial wetland |
| CN102435486A (en) * | 2011-09-01 | 2012-05-02 | 上海市环境科学研究院 | Method for classifying artificial wetland obstructions and extracting components of artificial wetland obstructions |
| CN102992485A (en) * | 2012-08-21 | 2013-03-27 | 南阳市乾景中药材开发有限公司 | Method for treating sewage by constructing artificial wetland with vetiver grass |
| CN102992485B (en) * | 2012-08-21 | 2014-08-27 | 南阳市行知专利技术服务有限公司 | Method for treating sewage by constructing artificial wetland with vetiver grass |
| CN103449611A (en) * | 2013-09-17 | 2013-12-18 | 同济大学 | Horizontal subsurface flow artificial wetland treatment device with controllable oxygen supply |
| CN104045163A (en) * | 2014-06-26 | 2014-09-17 | 南京师范大学 | Method for improving artificial wetland sewage treatment performance by using titanium-containing blast furnace slags |
| CN104045163B (en) * | 2014-06-26 | 2016-02-24 | 南京师范大学 | A kind of method utilizing titanium-containing blast furnace slag to promote Wastewater Treatment by Constructed Wetlands performance |
| CN106242059A (en) * | 2016-08-05 | 2016-12-21 | 汪静 | A kind of modularized artificial wetland sewage treatment unit |
| CN114735896A (en) * | 2022-04-25 | 2022-07-12 | 同济大学 | Artificial wetland device and sewage purification method |
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| CN101177321B (en) | 2011-08-24 |
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