CN104326574A - Horizontal subsurface wetland system for intensifying denitrification of micro-polluted water in winter - Google Patents
Horizontal subsurface wetland system for intensifying denitrification of micro-polluted water in winter Download PDFInfo
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- CN104326574A CN104326574A CN201410683823.9A CN201410683823A CN104326574A CN 104326574 A CN104326574 A CN 104326574A CN 201410683823 A CN201410683823 A CN 201410683823A CN 104326574 A CN104326574 A CN 104326574A
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- 230000000845 anti-microbial effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
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- 210000000476 body water Anatomy 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/004—Apparatus and plants for the biological treatment of water, waste water or sewage comprising a selector reactor for promoting floc-forming or other bacteria
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to a horizontal subsurface wetland system for intensifying denitrification of micro-polluted water in winter, which effectively solves the problem that the denitrification effect of the wetland in winter is affected by low BOD5/NO<3->, dissolved oxygen, substrate clogging and the like. The method comprises the following steps: forming a water distributing room between a water distributing plate which is arranged on the inner face at the water inlet end of a substrate bed body and an inner face at the water inlet end; forming a water receiving room between a water receiving plate which is arranged on the inner face at the water outlet end and the inner face at the water outlet end; arranging a plurality of sampling tubes at the front and middle sections in the substrate bed body between the water distributing plate and the water receiving plate; forming ventilating holes in each sampling tube; arranging a corncob layer at the rear section in the substrate bed body; forming limber holes in the water distributing plate and the water receiving plate, wherein the substrate bed body between the water distributing plate and the water receiving plate is internally filled with a gravel layer, a zeolite layer and a gravel scrap iron layer from top to bottom; installing a water inlet pipe on the end face at the water inlet end of the substrate bed body; installing a water outlet pipe used for adjusting the water level on the end face at the water outlet end; and covering the surface of the wetland system with a thin film. The system provided by the invention is simple to maintain, low in substrate clogging frequency and low in operating cost, and the denitrification percent is not less than 40%.
Description
Technical field
The present invention relates to Sewage treatment systems, particularly a kind of horizontal subsurface flow wetland system strengthening micropollutant water denitrogenation in winter.
Background technology
Water source is contaminated is in the world ubiquitous problem, and especially China is one of country of water resources critical shortage in the world, and water resources ownership per capita is few, and water pollutions is very serious.In recent years, owing to constantly strengthening construction of wastewater treatment plant, the problem that sewage is directly discharged obtains to be contained to a certain extent, but even if sewage work performs the strictest emission standard, its effluent index and water environment quality standard still exist a certain distance.River, as the storage water body of various processed waste water, is often also subject to the pollution of organism and nitrogen phosphorus, but relatively pollutes comparatively light, is called as micropollutant water.Although this type of water pollution is also not serious, but most of river ecological environmental quality is poor, water environmental function requirement cannot be met, especially in the north, because most area river lacks natural runoff, water resources critical shortage, cause natural water body water environment capacity very limited, ensure and maintain the requirement of surface water environment function zoning that there is quite large difficulty.
At present, Chinese scholars has worked out some technique means and has purified polluted river micropollutant water.(1) conventional physical cleaning method comprises river aeration, diversion dilution and bed mud and dredges and complete.These class methods need to consume higher energy just can reach the desired result such as aeration, dredging, dirt removal, and does not fundamentally remove pollutent, cures the symptoms, not the disease.(2) chemical purification has the chemistry of chemical algae removing, flocculation sediment and heavy metal fixing.Nitrogen, phosphorus or heavy metal are not also removed by these class methods from water body, and due to the application of chemical reagent, easily cause secondary pollution.In addition, for the great river of flow, the dose added is also very large, and economy is poor.(3) bacterium method, biomembrance process and aeration aerating method are thrown in having that biological clarification is conventional.Generally speaking, biopurification has the advantage that treatment effect is good, reduced investment, energy consumption are low and can recover or strengthen the self-purification capacity of water body, but the seed selection of throwing the high-effective microorganism applied in bacterium method needs the long period, and the decontamination effect improving time length is short, and is subject to the restriction of external conditions; Biomembrance process and aeration aerating method input are all comparatively large, under the prerequisite of limited fund, should not adopt on a large scale.(4) ecotechnology mainly contains plant purification technology, land treatment technique, stabilization pond technology and Constructed Wetland For Purifying technology.Ecological restoration measure has that regulation effect is good, energy consumption is low, working cost is low, safeguard simple advantage, and especially Constructed Wetland For Purifying method, also has certain ecological benefits and economic benefit.
Though Artificial Wetland Techniques is in southern widespread use, apply being very limited in the north, major cause has: the weather condition of (1) north cold inhibit microorganism active, cause poor removal effect; (2) winter, plant was withered or dead, photosynthesis reoxygenation reduced capability, and in matrix bed, dissolved oxygen is not enough; (3) processed waste water of river storage, BOD
5/ NO
3 -lower, biodegradability is poor, limits the treatment effect of artificial swamp; (4) winter, microorganism active was limited, accelerated matrix bed blocking frequency.
Although recognize BOD
5/ NO
3 -, dissolved oxygen, substrate clogging problems affect wetland in winter denitrification effect, but there is no the technical solution scheme gained public acceptance both at home and abroad at present.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the present invention is just to provide a kind of horizontal subsurface flow wetland system strengthening micropollutant water denitrogenation in winter, can effectively solve low BOD
5/ NO
3 -, dissolved oxygen, substrate clogging etc. affect the problem of wetland denitrification effect in winter.
The technical scheme that the present invention solves is, this system comprises water distribution board, matrix bed body and water collecting plate, matrix bed body along long to feed-water end inner face be provided with the water distribution board being upwards parallel to matrix bed body end face, form between water distribution board and feed-water end inner face between water distribution, matrix bed body along long to water side inner face be provided with the water collecting plate being upwards parallel to matrix bed body end face, form between water collecting plate and water side inner face and receive between water, leading portion in the matrix bed body formed between water distribution board and water collecting plate and stage casing are placed with the stopple coupon of multiple tracks ventilation vertically upward, each stopple coupon has ventilating pit, in matrix bed body, back segment is placed with vertically upward and is parallel to corn sandwich layer (the described leading portion of water collecting plate inner face as Mierocrystalline cellulose carbon source, stage casing, back segment is front with feed-water end, water side is rear definition), water distribution board is identical with water collecting plate structure, water distribution board and water collecting plate are evenly equipped with limbers, sand stone layer is filled with successively from top to bottom in matrix bed body between water distribution board and water collecting plate, zeolite layer, gravel iron filings layer, between sand stone layer and zeolite layer, be provided with between zeolite layer and gravel iron filings layer for prevent hypothallus from caving in or under the permeable cloth of geotechnique that oozes, the end face of matrix bed body feed-water end is equipped with water inlet pipe, the end face of water side is provided with the first rising pipe for regulating water level from top to bottom, second rising pipe, 3rd rising pipe, wet land system surface coverage has film, with the insulation construction regulating the rising pipe of water level to form water in bed body, by the limbers on water distribution board, water body is Tortuous flow in matrix bed body uniformly, fully contact with corn sandwich layer, improve the BOD of water body
5/ NO
3 -, by the first rising pipe, second rising pipe, 3rd rising pipe regulates the water level in matrix bed body, regulation of level is combined with the coating film measure of matrix bed surface, ensure the water temperature in matrix bed body, and then strengthen the denitrification effect in winter of horizontal subsurface flow wetland system, the layout density of stopple coupon is reduced to water side successively by feed-water end, matrix bed body front end reoxygenation ability is higher than rear end, oxygen enrichment water body is made mainly to concentrate on matrix bed body front end, for the aerobic nitrification effect of matrix bed body front end and the effect of end anaerobic denitrifying create conditions, favourable wetland is to the removal effect of nitrogen, benefit the carrying out of matrix bed body front end nitrification and end denitrification.
The present invention be directed to wetland promote in the north limited and provide a kind of reasonable in design, reoxygenation measure and the proper horizontal subsurface flow wetland system of Insulation, matrix configuration and the distribution of this system can significantly improve the denitrification ability of horizontal subsurface flow wetland system in winter, and safeguard simple, substrate clogging frequency is low, and can strengthen wetland bed denitrification ability in winter, denitrification percent is not less than 40%, and safeguard simple, working cost is low, effectively solves water pollution problems, and economic and social benefit is huge.
Accompanying drawing explanation
Fig. 1 is cross-section structure front view of the present invention.
Fig. 2 is the structural front view of water distribution board of the present invention (or water collecting plate).
Fig. 3 is matrix bed body bottom surface structure sectional front view of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, the present invention includes water distribution board, matrix bed body and water collecting plate, matrix bed body along long to feed-water end inner face be provided with the water distribution board 3 being upwards parallel to matrix bed body end face, 13 are formed between water distribution between water distribution board and feed-water end inner face, matrix bed body along long to water side inner face be provided with the water collecting plate 11 being upwards parallel to matrix bed body end face, form between water collecting plate and water side inner face and to receive between water 14, leading portion in the matrix bed body formed between water distribution board and water collecting plate and stage casing are placed with the stopple coupon 4 of multiple tracks ventilation vertically upward, each stopple coupon has ventilating pit 5, in matrix bed body back segment be placed with vertically upward be parallel to water collecting plate inner face as Mierocrystalline cellulose carbon source corn sandwich layer 9(described in leading portion, stage casing, back segment is front with feed-water end, water side is rear definition), water distribution board is identical with water collecting plate structure, water distribution board and water collecting plate are evenly equipped with limbers 3-1, sand stone layer 6 is filled with successively from top to bottom in matrix bed body between water distribution board and water collecting plate, zeolite layer 7, gravel iron filings layer 8, between sand stone layer 6 and zeolite layer 7, be provided with between zeolite layer 7 and gravel iron filings layer 8 for prevent hypothallus from caving in or under the permeable cloth 10 of geotechnique that oozes, the end face of matrix bed body feed-water end is equipped with water inlet pipe 2, the end face of water side is provided with the first rising pipe 12-1 for regulating water level from top to bottom, second rising pipe 12-2, 3rd rising pipe 12-3, wet land system surface coverage has film, with the insulation construction regulating the rising pipe of water level to form water in bed body, by the limbers on water distribution board, water body is Tortuous flow in matrix bed body uniformly, fully contact with corn sandwich layer 9, improve the BOD of water body
5/ NO
3 -, by the first rising pipe 12-1, second rising pipe 12-2, 3rd rising pipe 12-3 regulates the water level in matrix bed body, regulation of level is combined with the coating film measure of matrix bed surface, ensure the water temperature in matrix bed body, and then strengthen the denitrification effect in winter of horizontal subsurface flow wetland system, the layout density of stopple coupon is reduced to water side successively by feed-water end, matrix bed body front end reoxygenation ability is higher than rear end, oxygen enrichment water body is made mainly to concentrate on matrix bed body front end, for the aerobic nitrification effect of matrix bed body front end and the effect of end anaerobic denitrifying create conditions, favourable wetland is to the removal effect of nitrogen, benefit the carrying out of matrix bed body front end nitrification and end denitrification.
Described matrix bed body be by the brick rectangular periphery body of wall 1-1 that builds up and periphery body of wall bottom bottom surface 1-2 form, matrix bed body long-width ratio is 2 ︰ 1, high 1.2 meters, bottom surface is the composite structure be made up of the clay seam 1-2-1 that the thick high density polyethylene(HDPE) antiseepage layer of cloth 1-2-2 of plain soil layer 1-2-3,1.5mm that bottom-up compacting 20cm is thick and compacting 10cm is thick.
Described stopple coupon 4 is the circular hollow tubes of the diameter 1.5cm be made up of PVC, open tube has the ventilating pit 5 of 0.3cm at interval of 8.0cm.
Described corn sandwich layer 9, the particle diameter of corn cob is 0.5-3cm, vertically places, laying depth 1.0 ~ 3.0cm in matrix bed body posterior segment, and height 80cm, width is identical with the width of matrix bed body.
Described sand stone layer thickness is 20cm, zeolite layer thickness is 40cm, gravel iron filings layer thickness is 30cm, gravel size 0.5 ~ 1.0cm, sized zeolite particles 1.0 ~ 2.0cm, grain size of gravel 2.0 ~ 4.0cm, iron filings particle diameter 0.5 ~ 1.0cm, volume ratio 1 ︰ 8 ~ 10 of iron filings and gravel.
The permeable cloth of described geotechnique is the woven dacron of thickness 1.5mm; Described film is the TPU waterproof ventilated membrane of thickness 0.2mm.
Described water distribution board 3, the top of water collecting plate 11 are lower than the long upper edge to the matrix bed body at two ends, the upper top of stopple coupon 4 is higher than the upper edge of matrix bed body, the ventilating pit of stopple coupon topmost will lower than the upper plane of sand stone layer 6, the top of corn sandwich layer 9 is higher than the upper plane of sand stone layer 6, to ensure result of use.
Described sand stone layer surface can be coated with sand, and kind is implanted with the plants such as reed, cattail or wilson iris.
From the above, the present invention is made up of the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter jointly water distribution board, matrix bed body, water collecting plate and reoxygenation structure and insulation construction.
Described reoxygenation structure (measure) combines for ventilation stopple coupon and regulation of level, and it is descending that stopple coupon of ventilating longitudinally places density, and water level regulates according to oxygen in water concentration in matrix bed body;
The mode that described insulation construction (measure) combines for coating film and regulation of level, film is the TPU air-permeating film of thickness 0.2mm, and water level regulates according to water temperature in matrix bed body.
Ventilation stopple coupon material is PVC, acid and alkali-resistance, corrosion-resistant.Ventilation stopple coupon irregular laying, layout density are longitudinally descending along matrix bed body, matrix bed body front end reoxygenation ability is higher than rear end, oxygen enrichment water body is made mainly to concentrate on matrix bed body front end, for the aerobic nitrification effect of matrix bed body front end and the effect of end anaerobic denitrifying create suitable condition, favourable wetland is to the removal effect of nitrogen.
Mierocrystalline cellulose carbon source selects corn cob, material possess wide material sources, cheap, block the advantages such as matrix bed by force, not easily for carbon ability.Corn cob is vertically placed in matrix bed body posterior segment, fully contacts, the release of corn cob extract in the horizontal Tortuous flow process of water body with corn cob, improves the biodegradability (BOD of waste water
5/ NO
3 -), for denitrification creates favorable conditions, and then promote that wetland is to the removal effect of nitrogen.
The trade wastes such as iron filings are applied in the middle of horizontal subsurface flow wetland structure, integrated use electrochemical principle (the Inner electrolysis technology of iron filings/carbon composition) improves the biodegradability of micropollutant water, under the acting in conjunction of microorganism, plant, matrix, realize the strengthened purification to micropollutant water.
And through actual tests, achieve very satisfied Advantageous Effects, its technical superiority is mainly:
The irregular Reasonable Arrangement of ventilation stopple coupon, while reaching clean effect, avoid the power consumption of aerating system, save running cost, ton water treatment expense is not higher than 0.05 yuan, and conventional sewage processing cost is not less than 0.4 yuan/ton, sewage disposal expense is only 1/8 of former processing costs, and economical effectiveness is very huge;
The materials application such as trade waste, agricultural waste, in the middle of wetland builds, not only for waste treatment provides place, and improves wastewater biodegradability, the BOD of micropollutant water
5/ NO
3 -can more than 2.0 be promoted to by about 1.0 originally, and then promote the clean effect of wetland;
The different Insulations such as plastic film covering, regulation of level (precipitation position utilizes geothermal insulation) with the combination of reoxygenation measure while solving insulation (intercepting matrix bed body with extraneous gaseous interchange) and reoxygenation contradiction, water temperature in wetland bed can remain on more than 10 DEG C, dissolved oxygen concentration is not less than 2mg/L, ensure that the denitrification percent of this wet land system in winter is not less than 40%, the clearance of horizontal subsurface flow wetland to TN only maintains about 20% under normal circumstances, denitrification percent of the present invention far above prior art, and obtains sufficient proof through practical application.
Example 1
As adopted technology of the present invention to process wetland periphery sanitary sewage and part trade effluent in Liaoning estuarine wetland engineering, engineering is made up of sewage disinfection treatment district, horizontal subsurface flow wetland treatment zone (main process), surface-flow Landscape Region, horizontal subsurface flow wetland lays three kinds of matrix altogether, plantation layer 0.3m, small particle size gravel bed 0.5m, Large stone gravel bed 0.4m.Horizontal subsurface flow wetland water distribution adopts PVC pipeline multipoint water feeding, having high, medium and low three water levels, carrying out runoff investigation by opening three water level valves.For ensureing that wet land system normally runs winter, field staff is incubated wet land system by materials such as plastic covering film, woven straws, in wet land system, water temperature can maintain 10 ~ 15 DEG C, and water outlet meets the A standard of " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) primary standard.
Example 2:
For another example, technology of the present invention is adopted to process upstream river, periphery trade effluent and sanitary sewage in Shanxi riverine wetland engineering, wetland main body treatment process is " pre-treatment settling tank+free water surface wetland+vertical-flow wetland ", the rubble packing course of the thick different size of 1.5m is laid in vertical-flow wetland bed, be divided into five layers, from top to bottom, ballast grain sizes ascending (3mm ~ 100mm), is purified water by the antimicrobial absorbent in hypothallus.Upper layer is covered with sand, it is planted and is implanted with the plants such as reed, cattail, wilson iris.Evenly be laid with airway in vertical-flow wetland, single airway overall length 1.8m, on tube wall, interval 30cm evenly opens pore (aperture is about 5mm).After the winter plant harvesting such as reed, straw, air-permeating film are covered current wetland surface, owing to processing winter, the water yield is little, hydraulic detention time is long, winter, wetland was more or less the same with other seasons to the processing efficiency of COD, ammonia nitrogen, and wetland effluent main pollutant consistence reaches surface water IV class water quality standard.
Can clearly be found out by above-mentioned data, the present invention can strengthen wetland bed denitrification ability in winter, and denitrification percent is not less than 40%, and safeguard simple, working cost is low, has very strong practicality, be administer one on water pollutions to innovate greatly, economic and social benefit is huge.
Claims (9)
1. strengthen the horizontal subsurface flow wetland system of micropollutant water denitrogenation in winter for one kind, comprise water distribution board, matrix bed body and water collecting plate, it is characterized in that, matrix bed body along long to feed-water end inner face be provided with the water distribution board (3) being upwards parallel to matrix bed body end face, form between water distribution board and feed-water end inner face (13) between water distribution, matrix bed body along long to water side inner face be provided with the water collecting plate (11) being upwards parallel to matrix bed body end face, form between water collecting plate and water side inner face and receive (14) between water, leading portion in the matrix bed body formed between water distribution board and water collecting plate and stage casing are placed with the stopple coupon (4) of multiple tracks ventilation vertically upward, each stopple coupon has ventilating pit (5), in matrix bed body, back segment is placed with vertically upward and is parallel to the corn sandwich layer (9) of water collecting plate inner face as Mierocrystalline cellulose carbon source, water distribution board is identical with water collecting plate structure, water distribution board and water collecting plate are evenly equipped with limbers (3-1), sand stone layer (6) is filled with from top to bottom successively in matrix bed body between water distribution board and water collecting plate, zeolite layer (7), gravel iron filings layer (8), between sand stone layer (6) and zeolite layer (7), be provided with between zeolite layer (7) and gravel iron filings layer (8) for prevent hypothallus from caving in or under the permeable cloth of geotechnique (10) that oozes, the end face of matrix bed body feed-water end is equipped with water inlet pipe (2), the end face of water side is provided with the first rising pipe (12-1) for regulating water level from top to bottom, second rising pipe (12-2), 3rd rising pipe (12-3), wet land system surface coverage has film, with the insulation construction regulating the rising pipe of water level to form water in bed body, by the limbers on water distribution board, water body is Tortuous flow in matrix bed body uniformly, fully contact with corn sandwich layer (9), improve the BOD of water body
5/ NO
3 -, by the first rising pipe (12-1), second rising pipe (12-2), 3rd rising pipe (12-3) regulates the water level in matrix bed body, regulation of level is combined with the coating film measure of matrix bed surface, ensure the water temperature in matrix bed body, and then strengthen the denitrification effect in winter of horizontal subsurface flow wetland system, the layout density of stopple coupon is reduced to water side successively by feed-water end, matrix bed body front end reoxygenation ability is higher than rear end, oxygen enrichment water body is made mainly to concentrate on matrix bed body front end, for the aerobic nitrification effect of matrix bed body front end and the effect of end anaerobic denitrifying create conditions, favourable wetland is to the removal effect of nitrogen, benefit the carrying out of matrix bed body front end nitrification and end denitrification.
2. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, described matrix bed body be by the brick rectangular periphery body of wall (1-1) that builds up and periphery body of wall bottom bottom surface (1-2) form, matrix bed body long-width ratio is 2 ︰ 1, high 1.2 meters, bottom surface is the composite structure be made up of the thick high density polyethylene(HDPE) antiseepage layer of cloth (1-2-2) of the thick plain soil layer (1-2-3) of bottom-up compacting 20cm, 1.5mm and the thick clay seam (1-2-1) of compacting 10cm.
3. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, described stopple coupon (4) is the circular hollow tube of the diameter 1.5cm be made up of PVC, open tube has the ventilating pit (5) of 0.3cm at interval of 0.8cm.
4. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, described corn sandwich layer (9), the particle diameter of corn cob is 0.5-3cm, vertically place in matrix bed body posterior segment, laying depth 1.0 ~ 3.0cm, height 80cm, width is identical with the width of matrix bed body.
5. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, described sand stone layer thickness is 20cm, zeolite layer thickness is 40cm, gravel iron filings layer thickness is 30cm, gravel size 0.5 ~ 1.0cm, sized zeolite particles 1.0 ~ 2.0cm, grain size of gravel 2.0 ~ 4.0cm, iron filings particle diameter 0.5 ~ 1.0cm, volume ratio 1 ︰ 8 ~ 10 of iron filings and gravel.
6. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, the permeable cloth of described geotechnique is the woven dacron of thickness 1.5mm.
7. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, described film is the TPU waterproof ventilated membrane of thickness 0.2mm.
8. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, described water distribution board (3), the top of water collecting plate (11) are lower than the long upper edge to the matrix bed body at two ends, the upper top of stopple coupon (4) is higher than the upper edge of matrix bed body, the ventilating pit of stopple coupon topmost will lower than the upper plane of sand stone layer (6), and the top of corn sandwich layer (9) is higher than the upper plane of sand stone layer (6).
9. the horizontal subsurface flow wetland system of strengthening micropollutant water denitrogenation in winter according to claim 1, it is characterized in that, described sand stone layer surface coverage has sand, and kind is implanted with reed, cattail or wilson iris plant.
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| CN105399208A (en) * | 2015-11-20 | 2016-03-16 | 云南大学 | Enhanced constructed wetland denitration system and method |
| CN107151056A (en) * | 2017-06-27 | 2017-09-12 | 郑州大学环境技术咨询工程有限公司 | It is a kind of to strengthen the horizontal drowned flow artificial wet land system of denitrification |
| CN107540086A (en) * | 2017-09-22 | 2018-01-05 | 中国科学院武汉植物园 | Handle the denitrification denitrogenation bed system of nitrate nitrogen sewage |
| CN108640416A (en) * | 2018-04-28 | 2018-10-12 | 江西怡杉环保股份有限公司 | A kind of wetland ventilating system |
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