CN202148222U - Processing device for denitrification and phosphorous removal of high-load reciprocating type undercurrent artificial wetland - Google Patents
Processing device for denitrification and phosphorous removal of high-load reciprocating type undercurrent artificial wetland Download PDFInfo
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- CN202148222U CN202148222U CN201120201707U CN201120201707U CN202148222U CN 202148222 U CN202148222 U CN 202148222U CN 201120201707 U CN201120201707 U CN 201120201707U CN 201120201707 U CN201120201707 U CN 201120201707U CN 202148222 U CN202148222 U CN 202148222U
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model relates to a processing device for denitrification and phosphorous removal of a high-load reciprocating type undercurrent artificial wetland. The processing device comprises an impermeable layer (8), a water proof layer (4), a wetland water inlet pipeline (6) and a water collecting and discharging device (7), wherein the impermeable layer (8) is lain on the inner periphery wall and the bottom wall of a wetland tank body (1), the water proof layer (4) is arranged in the middle of the inner part of the wetland tank body (1), the wetland water inlet pipeline (6) is arranged below the water proof layer (4), and the water collecting and discharging device (7) is arranged above the water proof layer (4); paddings (2) are laid both above and below the water proof layer (4), wetland plants (3) are planted above the paddings (2), a sand filter section (5) is arranged at the upper part of the water proof layer (4) close to the water collecting and discharging device (7), and an emptying pipe (9) is arranged at the bottom of the wetland tank body. The device has the advantages of high efficiency in denitrification and phosphorous removal, stable running in winter at low temperature, small occupied area, high pollution load rate and the like.
Description
Technical field
The utility model belongs to field of environment engineering technology, relates to purification of water quality and ecological reestablishment, particularly is applied to the dephosphorization of sewage disposal plant effluent advanced nitrogen and handles the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of a kind of high loading treatment unit of more specifically saying so.
Background technology
Artificial swamp (constructed wetland); Promptly build up pond or groove with manual work; The antiseep water-resisting layer is laid in the bottom surface, fills the soil or the packing layer of certain depth, the vascular plant that the plantation reed is a type or the waterplant of well developed root system; Sewage is got into through the water distribution pipe duct by an end of wetland, with the plug-flow mode be covered with biomembranous dielectric surface and carry out sufficient roots of plants district with dissolved oxygen and contact and obtain purification.
The artificial swamp treatment technology belongs to a kind of method of ecological management sewage; It is according to species symbiosis in the ecological device, regeneration of material principle, and structure and orthofunction principle are in promoting waste water under the eucyclic prerequisite of pollution substance; Give full play to the regeneration potential of resource; Preventing the recontaminate of environment, obtain the optimum efficiency of WWT and resource utilization, is a kind of mode of ecological sewage treatment preferably.When removing pollutent, wetland plant also play a part to keep wetland filtration condition, prevent to silt up; Device can be realized continuous water inlet, and pollutent is had treatment effect preferably, in management, answers attention control wetland plant disease and pest, and plant residue needs harvesting in time, and reseeds.
Over surplus in the of nearly 30 year; External pay attention to day by day wetland is to the Water purification of sewage, is confirmed the wetland method the America and Europe as cheap, the less energy-consumption and the method for effectively disposing of sewage, and in practical applications, obtained immense success; The Seventh Five-Year Plan, during the State's Eighth Five-Year Plan period; China has also organized the special topic for tackling key problems research of municipal effluent wetland treatment technology, on the basis of the purification function of having studied the kinds of processes method and processing parameter, has set up the demonstration project of different scales.Research shows; The reed wetland device not only has good purification efficiency to organic contamination in the sewage; And N (nitrogen), P nutrition such as (phosphorus) and some heavy metal also had higher removal, be the municipal sewage treatment low, easy and simple to handle of a less investment, instant effect, working cost and the effective way of utilization.Artificial swamp treatment technology comparison typical construction examples comprises: Yunnan Fuxian Lake artificial swamp, Pinghu Town of Shenzhen Region white clay cheat worker's wetland device, park, Honghu, Shenzhen artificial swamp, lake, Guanlan, Shenzhen golf club staff quarters sewage wetland treatment project, the Shenzhen's sweet worker's of cheating wetland device engineering, the Cai Jia of Chongqing City town's sanitary sewage disposal engineering etc.In recent years, this Study on Technology is extensive day by day with application.
The artificial wetland process common type has surface current wetland, horizontal drowned flow wetland and vertical-flow wetland; Being widely used in large size city sewage second-level treating water advanced purification process is the surface current wetland; Have advantages such as reduced investment, landscape effect be good, but its floor space is bigger; Adopt horizontal drowned flow wetland type at present mostly, the type wetland receives seasonal effect less, and treatment effect is better, but hydraulic load is less, and floor space is bigger; The vertical subsurface flow wetland hydraulic load is high, and floor space is little, in south application is arranged more, because the north of china in winter frozen soil layer is thicker, causes the vertical subsurface flow wetland device can't carry out water distribution.It is thus clear that the development of artificial swamp has run into several bottlenecks that need breakthrough: (1) urban land resource at present is nervous, should improve pollutent land area rate of load condensate when carrying out the wetland waste water control as far as possible, reduces ton water and soil ground area; (2) wetland waterpower path is shorter, and its denitrogenation dephosphorizing effect remains further to be improved; When (3) the sewage wetland is handled and to be used in the north owing to cold weather, frozen soil layer cause wetland fluctuation of service, winter processing efficiency problem such as low more deeply.
Summary of the invention
The utility model provides the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of a kind of high loading in order to address the above problem.
The utility model is to address this problem the technical scheme of being taked to be:
The treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of the high loading of the utility model; Comprise the impervious barrier that is laid on wetland pond body internal perisporium and the diapire; Be arranged on the water-resisting layer of wetland pond body bosom, be positioned at the wetland inlet channel and the collection water-freeing arrangement that is positioned at the water-resisting layer top of water-resisting layer below; The water-resisting layer above and below all is equipped with filler, filler top plantation wetland plant, and the water-resisting layer top is provided with the sand filtration section near Ji Paishuizhuanzhichu, and body bottom in wetland pond is provided with blow-down pipe.
Described wetland pond body is a rectangular body, and long-width ratio is 1.5/1-4.5/1, highly is 1.5-2m, and wetland pond body structure is that brick mixes or undisturbed soil fill.
Described water-resisting layer is positioned at body inner height 50-100cm place, wetland pond; Water-resisting layer is made up of anti seepage membrane and the coarse sand resist that is positioned at the anti seepage membrane above and below; Anti seepage membrane rear end and wetland body of wall distance is 50cm-150cm, is beneficial to sewage and returns from wetland lower floor and flow to the wetland upper strata.
Described anti seepage membrane coarse sand protective layer thickness up and down is 150mm, and particle diameter is 5-15mm, and between coarse sand resist and filler, is provided with geotextile, prevents that coarse sand runs off.
The filler of water-resisting layer below is 30-80mm gravel or rubble in the body of described wetland pond; The filler of sealing coat top is gravel or the rubble of 30-60mm; And above the body of wetland pond, fill the thick planting soil of 20cm, plant wetland plants such as reed, cattail, Canna generalis Bailey above the planting soil.
Being positioned at wetland pond body water-resisting layer top is 1.5-3m near the sand filtration section width of position, water side.
Described inlet channel, collect water-freeing arrangement and blow-down pipe is positioned at body the same side, wetland pond, the collection water-freeing arrangement is made up of catchment pipeline and discharge conduit, and the wetland draining is then discharged by discharge conduit through the pipeline collection of catchmenting.
Described blow-down pipe is positioned at 200mm place at the bottom of the wetland pond, enters discharge conduit through blow-down pipe during wetland emptying.
Advantage and the positively effect that the utlity model has are:
The reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading of the present invention treatment unit; Can remove pollutents such as nitrogen in the sewage, phosphorus economical, effectively; Break through low, the restrictions such as floor space big, total nitrogen poor removal effect of current wetland device processing efficiency in winter; Improve land area pollutant load rate, save the wetland construction land in a large number.
Adopt artificial swamp denitrogenation dephosphorizing treatment unit of the present invention; Insert wetland with sewage disposal plant effluent or through pretreated high nitrate nitrogen sewage through pipeline; Wetland plant growth and microbial film through 2～3 months are cultivated, and can effectively remove the pollutents such as nitrogen phosphorus in the sewage, and monitoring result shows that this device can reach 70～85% to TN in the water body (total nitrogen) clearance; TP (total phosphorus) clearance maintains 80～95%, and COD (COD) clearance maintains between 55～80%.
Description of drawings
Fig. 1 is the structural representation of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of the high loading of the utility model treatment unit;
Fig. 2 is the diagrammatic cross-section of water inlet of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of the high loading of the utility model treatment unit and collection water-freeing arrangement.
Major parts nomenclature in the accompanying drawing:
1: wetland pond body 2: filler
3: wetland plant 4: water-resisting layer
5: sand filtration section 6: inlet channel
7: collection water-freeing arrangement 8: impervious barrier
9: blow-down pipe 10: pipeline catchments
11: discharge conduit 12: anti seepage membrane
13: the coarse sand resist.
Embodiment
Followingly the utility model is carried out detailed explanation with reference to accompanying drawing and embodiment.
Fig. 1 is the structural representation of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of the high loading of the utility model treatment unit; Fig. 2 is the diagrammatic cross-section of water inlet of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of the high loading of the utility model treatment unit and collection water-freeing arrangement.As depicted in figs. 1 and 2; The treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of the high loading of the utility model; Comprise the impervious barrier 8 that is laid on wetland pond body 1 internal perisporium and the diapire; Be arranged on the water-resisting layer 4 of wetland pond body 1 bosom, be positioned at the wetland inlet channel 6 and the collection water-freeing arrangement 7 that is positioned at water-resisting layer 4 tops of water-resisting layer 4 belows.Water-resisting layer 4 above and belows all are equipped with filler 2, filler 2 tops plantation wetland plant 3, and water-resisting layer 4 tops are provided with sand filtration section 5 near collection water-freeing arrangement 7 places, and body 1 bottom, wetland pond is provided with blow-down pipe 9.
Wetland pond body 1 is a rectangular body, and long-width ratio is 1.5/1-4.5/1, highly is 1.5-2m, and wetland pond body 1 is a brick mix structure, meets the requirements if build the regional soil PQ, can carry out fill with undisturbed soil.
Water-resisting layer 4 is positioned at body inner height 50-100cm place, wetland pond; Water-resisting layer 4 is made up of anti seepage membrane 12 and the coarse sand resist 13 that is positioned at anti seepage membrane 12 above and belows; Anti seepage membrane 12 rear ends and wetland body of wall distance is 50cm-150cm, is beneficial to sewage and returns from wetland lower floor and flow to the wetland upper strata.Water-resisting layer 4 is divided into wetland pond body 1 two-layer up and down, and lower floor is the anaerobic/anoxic district, is beneficial to the denitrifying bacteria growth, can significantly improve the denitrification rate of nitrate nitrogen in the artificial swamp sewage, reduces total nitrogen concentration in the artificial wetland effluent; The upper strata is an aerobic zone, can further remove the organism in the sewage.Coarse sand resist 13 thickness of anti seepage membrane about in the of 12 are 150mm, and particle diameter is 5-15mm, and between coarse sand resist and filler, is provided with geotextile, prevent that coarse sand runs off.
The filler 2 of water-resisting layer 3 belows is 30-80mm gravel or rubble in the wetland pond body 1; The filler 2 of sealing coat 3 tops is gravel or the rubble of 30-60mm; And above the body of wetland pond, fill the thick planting soil of 20cm, plant wetland plants such as reed, cattail, Canna generalis Bailey above the planting soil.
Being positioned at wetland pond body water-resisting layer top is 1.5-3m near sand filtration section 5 width of position, water side.Inlet channel 6, collect water-freeing arrangement 7 and blow-down pipe 9 is positioned at body 1 the same side, wetland pond, wherein inlet channel 6 is positioned at water-resisting layer 4 belows, and collection water-freeing arrangement 7 is positioned at water-resisting layer 4 tops.Collection water-freeing arrangement 7 is made up of with discharge conduit 11 pipeline 10 that catchments, and the wetland effluent that the pipeline 10 that catchments is collected is delivered to discharge channel 11.Blow-down pipe is positioned at 200mm place at the bottom of the wetland pond, can wetland water body be drained into discharge conduit 11 through blow-down pipe 9 during the wetland maintenance.
The specific embodiment of the utility model is following:
Embodiment 1
The reciprocating type drowned flow artificial wet land of high loading pond body is a brick mix structure, and it is shaped as rectangular body, and length * wide * height is 30 * 20 * 1.8m; The body periphery is all laid two cloth, one film geomembrane anti-seepage layer in the wetland pond, vertical at the bottom of the wetland pond 0.8m place water-resisting layer is set, wetland is divided into two-layer; The thick 30-80mm gravel of 0.65m is at first filled by lower floor; At the coarse sands layer of last filling 0.15m, on the coarse sand resist, lay the HDPE anti seepage membrane again, anti seepage membrane rear end and wetland body of wall distance are 1m; Being beneficial to sewage returns from wetland lower floor and flows to the wetland upper strata; On anti seepage membrane, fill 0.15m coarse sand resist, on the coarse sand resist, fill the thick 30-60mm gravel of 0.45m, fill the 0.2m planting soil more in the above; Plant wetland plants such as reed, cattail, Canna generalis Bailey above, at the wetland effluent end length * wide * height being set is the sand filter of 1.5 * 20 * 0.5m.The wetland inlet channel with collect water-freeing arrangement and is positioned at wetland pond body homonymy, wherein inlet channel is positioned at 0.4m place, water-resisting layer below, the pipeline that catchments is positioned at 0.4m place above the water-resisting layer, the wetland effluent of collection is delivered to discharge channel.
During enforcement sewage disposal plant effluent is inserted in the wetland through inlet channel; Cultivate through 2～3 months wetland plants and microbial film; Will form a complicated ecological device of being made up of a plurality of trophic levels such as bacterium, fungi, plants, wetland lower floor is the anaerobic/anoxic district, is beneficial to the denitrifying bacteria growth; Can significantly improve the denitrification rate of nitrate nitrogen in the artificial swamp sewage, reduce total nitrogen concentration in the artificial wetland effluent; The upper strata is an aerobic zone, can further remove the organism in the sewage.
Embodiment 2
The reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading treatment unit is adopted in the sewage work rear end in Tianjin; Filler is a gravel, and wetland plant was reed and cattail, through the steady running in 1 year; Through this device Inlet and outlet water is monitored; The result shows that this device is 75% to TN clearance in the water body, and the TP clearance maintains 90%, and the COD clearance maintains 80%.
Embodiment 3
Tianjin Landscape River water body is adopted the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of pre-treatment+high loading treatment unit, and filler is a rubble, the plantation Canna generalis Bailey, and through the continuous monitoring in 1 year half, this device hydraulic load was 1.0m
3/ m
2D is 78% to TN clearance in the water body, and the TP clearance maintains 88%, and the COD clearance maintains 85%.
The wetland treatment unit of the utility model has been practiced thrift land area effectively; Increased the wetland bed body degree of depth; Improved wetland unit surface pollutant load rate, got into wetland lower floor with sewage disposal plant effluent or through pretreated high nitrate nitrogen sewage through inlet channel during enforcement, wetland lower floor habitat environment is in the anaerobic/anoxic state; DO (dissolved oxygen) < 0.5 mg/>L; The growth and the breeding that utilize denitrifying bacterium are arranged, can significantly improve the denitrification rate of nitrate nitrogen in the artificial swamp sewage, help the removal of total nitrogen in the sewage; Sewage is through behind the denitrification denitrogenation and anaerobism dephosphorization of wetland lower floor; Turning back flows into the wetland upper strata, and under the effect of root system of plant oxygen therapy and surface air reoxygenation, habitat, upper strata environment DO concentration generally maintains 1.5 ~ 2.0 mg/L; Wetland upper strata DO content is apparently higher than wetland lower floor; For the further removal of sewage organic pollutant provides good environment, simultaneously, through absorption and precipitating action, the congregation of mikrobe and the number of ways such as sorption of wetland plant of wet land filler; Impel the total phosphorus concentration in the water outlet also to decrease, realized the purpose of the reciprocating type drowned flow artificial wet land advanced nitrogen of high loading dephosphorization.
In sum, among the embodiment that the content of the utility model is not confined to, the knowledgeable people in the same area can propose other embodiment easily within technical director's thought of the present invention, but this embodiment is included within the scope of the present invention.
Claims (8)
1. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading; It is characterized in that: this treatment unit comprises the impervious barrier (8) that is laid on wetland pond body (1) internal perisporium and the diapire; Be arranged on the water-resisting layer (4) of wetland pond body (1) bosom, wetland inlet channel (6) that is positioned at water-resisting layer (4) below and the collection water-freeing arrangement (7) that is positioned at above the water-resisting layer (4); Water-resisting layer (4) above and below all is equipped with filler (2), filler (2) top plantation wetland plant (3), and sand filtration section (5) is located to be provided with near collection water-freeing arrangement (7) in water-resisting layer (4) top, and body bottom in wetland pond is provided with blow-down pipe (9).
2. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading according to claim 1; It is characterized in that: wetland pond body (1) is a rectangular body; Long-width ratio is 1.5/1-4.5/1, highly is 1.5-2m, and wetland pond body structure is that brick mixes or undisturbed soil fill.
3. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading according to claim 1; It is characterized in that: water-resisting layer (4) is positioned at wetland pond body (1) inner height 50-100cm place; Water-resisting layer (4) is made up of anti seepage membrane (12) and the coarse sand resist (13) that is positioned at the anti seepage membrane above and below; Anti seepage membrane rear end and wetland body of wall distance is 50cm-150cm, is beneficial to sewage and returns from wetland lower floor and flow to the wetland upper strata.
4. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading according to claim 3; It is characterized in that: anti seepage membrane (12) coarse sand resist (13) thickness up and down is 150mm; Particle diameter is 5-15mm; And between coarse sand resist and filler, be provided with geotextile, prevent that coarse sand runs off.
5. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading according to claim 1; It is characterized in that: the filler of water-resisting layer below is 30-80mm gravel or rubble in the body of wetland pond; The filler of sealing coat top is gravel or the rubble of 30-60mm, and above the body of wetland pond, fills the thick planting soil of 20cm.
6. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading according to claim 1 is characterized in that: being positioned at wetland pond body water-resisting layer top is 1.5-3m near sand filtration section (5) width of position, water side.
7. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading according to claim 1; It is characterized in that: inlet channel (6), collect water-freeing arrangement (7) and blow-down pipe (9) is positioned at wetland pond body (1) the same side; Collection water-freeing arrangement (7) is made up of pipeline that catchments (10) and discharge conduit (11), and the wetland draining is collected the back through the pipeline that catchments (10) and discharged by discharge conduit (11).
8. the treatment unit of the reciprocating type drowned flow artificial wet land denitrogenation dephosphorizing of high loading according to claim 1 is characterized in that: blow-down pipe (9) is positioned at 200mm place at the bottom of the wetland pond, enters discharge conduit through blow-down pipe (9) during wetland emptying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120201707U CN202148222U (en) | 2011-06-16 | 2011-06-16 | Processing device for denitrification and phosphorous removal of high-load reciprocating type undercurrent artificial wetland |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120201707U CN202148222U (en) | 2011-06-16 | 2011-06-16 | Processing device for denitrification and phosphorous removal of high-load reciprocating type undercurrent artificial wetland |
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| CN202148222U true CN202148222U (en) | 2012-02-22 |
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| CN201120201707U Expired - Fee Related CN202148222U (en) | 2011-06-16 | 2011-06-16 | Processing device for denitrification and phosphorous removal of high-load reciprocating type undercurrent artificial wetland |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603074A (en) * | 2012-03-26 | 2012-07-25 | 哈尔滨工业大学宜兴环保研究院 | Double-layer subsurface-flow constructed wetland system used for sewage treatment in medium and small towns of cold areas and operation method thereof |
| CN103145251A (en) * | 2013-03-29 | 2013-06-12 | 黄河勘测规划设计有限公司 | Folding-flow artificial wetland system |
| CN105198155A (en) * | 2015-03-31 | 2015-12-30 | 吴永贵 | Anti-clogging sewage purification method and device |
| CN108569767A (en) * | 2017-08-01 | 2018-09-25 | 东北师范大学 | A kind of horizontal flow artificial wetland system and domestic sewage processing method |
| CN114716020A (en) * | 2022-04-28 | 2022-07-08 | 西安建筑科技大学 | Sewage treatment system based on anaerobic-aerobic double-layer artificial wetland |
-
2011
- 2011-06-16 CN CN201120201707U patent/CN202148222U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603074A (en) * | 2012-03-26 | 2012-07-25 | 哈尔滨工业大学宜兴环保研究院 | Double-layer subsurface-flow constructed wetland system used for sewage treatment in medium and small towns of cold areas and operation method thereof |
| CN103145251A (en) * | 2013-03-29 | 2013-06-12 | 黄河勘测规划设计有限公司 | Folding-flow artificial wetland system |
| CN105198155A (en) * | 2015-03-31 | 2015-12-30 | 吴永贵 | Anti-clogging sewage purification method and device |
| CN108569767A (en) * | 2017-08-01 | 2018-09-25 | 东北师范大学 | A kind of horizontal flow artificial wetland system and domestic sewage processing method |
| CN108569767B (en) * | 2017-08-01 | 2021-06-18 | 东北师范大学 | Horizontal flow artificial wetland system and domestic sewage treatment method |
| CN114716020A (en) * | 2022-04-28 | 2022-07-08 | 西安建筑科技大学 | Sewage treatment system based on anaerobic-aerobic double-layer artificial wetland |
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Granted publication date: 20120222 Termination date: 20200616 |