CN102887590A - Grading root zone sewage treatment ecological constructed wetland system - Google Patents
Grading root zone sewage treatment ecological constructed wetland system Download PDFInfo
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- CN102887590A CN102887590A CN2012104447458A CN201210444745A CN102887590A CN 102887590 A CN102887590 A CN 102887590A CN 2012104447458 A CN2012104447458 A CN 2012104447458A CN 201210444745 A CN201210444745 A CN 201210444745A CN 102887590 A CN102887590 A CN 102887590A
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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 grading root zone sewage treatment ecological constructed wetland system comprising a pre-treating pond, an inflow water distributing ditch, a primary wetland plant bed, a secondary wetland plant bed and a water collecting pond which are sequentially connected. The grading root zone sewage treatment ecological constructed wetland system is characterized in that a gravel layer is placed in the primary wetland plant bed, a sand stone layer is placed in the secondary wetland plant bed, and wetland plants are planted on the primary wetland plant bed and the secondary wetland plant bed. Preferably, a water level regulating gate is arranged on the water collecting pond so as to be convenient for regulating the water level of the wetland plant beds according to different water quantities of seasons. By adopting the grading root zone sewage treatment ecological constructed wetland system, through planting a permeable wetland of a horizontal bio-filter, all stages of wetland plant beds are singly constructed and are built simply and rapidly, the problem of mismatching and mixing among layers is avoided during use, and the treatment efficiency to CODcr (Chemical Oxygen Demand), BOD5 (Biochemical Oxygen Demand), SS (Som Somatostatin), NH3-N, TP and the like can achieve 80-95 percent.
Description
Technical field
The present invention relates to a kind of classification root district sewage treatment ecological artificial wet land system.
Background technology
A large amount of pollution substances increases the weight of the pollution of receiving water body in present town sewage and the trade effluent, causes water quality to worsen, and particularly contains a large amount of nitrogen, phosphorus in the sewage, can make body eutrophication, and this problem has caused people's common concern.Town sewage refers to the sewage that the Urban Areas resident forms in life and production process.Wherein town domestic sewage refers to lavatory sewage effluent in the resident living process, bathing, washes clothes and kitchen waste water etc., gives birth to sewage and has a large capacity and a wide range.Water environment situation will face a very severe problem, and irrigation water is seriously polluted, and groundwater mining is seriously polluted, and surface water is continuous degradating trend, lose gradually its original ecological environment function.
Wetlands ecosystems be by artificial construction and controlling run with the similar ground of swampland, sewage, mud there be batching on the artificial wetland of building of control, sewage and mud are in the process that flows in a certain direction, mainly utilize physics, chemistry, the biological triple synergies of soil, artificial dielectric, plant, microorganism, a kind of technology that sewage, mud are processed.Its mechanism of action comprises that absorption, delay, filtration, redox, precipitation, microorganism decomposition, conversion, plant are covered, the effect of residue accumulated, water transpiration and nutrition absorption and all kinds of animals.Wetlands ecosystems have very complicated purification mechanism to the processing of waste water, after stable, filling surface has adsorbed the large number of biological film that many microorganisms form, root system of plant is distributed in the wetland surface, rely on physics, chemistry, biological synergy is finished the scavenging process of sewage, strengthened the soil removability of the natural wetland ecosystem, so needing a kind of classification root district Wetlands ecosystems of utilizing disposes of sewage, it is large to have buffer capacity, treatment effect is good, technique is simple, reduced investment, the characteristics such as working cost is low are fit to the Small Urban sewage disposal and are convenient to the classification root district sewage wetland ecological treatment system of application.
Existing wet land system adopts the method in multilayer vertically passing filter tank that sewage is carried out filtration treatment more, multilayer vertically passing filter tank comprises the filtering layer that a plurality of differing materials consist of from top to bottom, placement filter layer process is complicated, and along with flow, the dislocation of interpenetrating of each filtering layer destroys original structure easily.
Summary of the invention
The filtering layer installation complexity that exists for overcoming prior art, the technological deficiency of easy infiltration dislocation the invention provides a kind of classification root district sewage treatment ecological artificial wet land system during use.
A kind of classification root of the present invention district sewage treatment ecological artificial wet land system, comprise the pretreatment pool that connects successively, the water inlet distributing flue, one-level wetland plant bed, secondary wetland plant bed and water collecting basin, it is characterized in that: place gravel bed in the described one-level wetland plant bed, place sand stone layer in the secondary wetland plant bed, the wetland plant of all having planted on described one-level wetland plant bed and the secondary wetland plant bed.
The present invention adopts single gravel or sand stone layer setting to the filtering layer of two-stage wetland plant bed, places simple and conveniently, by filtering layer suspended substance is stopped circuitously, utilizes Root of Wetland Plants to absorb and reaches the purpose of removing most of impurity in the sewage.
Preferably, also comprise the water level control apparatus that to regulate water level.
Further, described water collecting basin also is provided with the regulation of level lock.
Preferably
,Described one-level wetland plant bed and/or secondary wetland plant bed pond bottom sloping are 2%-3%.
Preferably, described one-level wetland plant bed water surface elevation is higher than secondary wetland plant bed water surface elevation.
Preferably, described one-level wetland plant bed bottom surface height is higher than secondary wetland plant bed bottom surface height.
Preferably, described secondary wetland plant bed also comprises the perforation header that is positioned at terminal bottom, and the outlet of described perforation header is connected with described water collecting basin.
Further, described secondary wetland plant bed also comprises the catchment area that is positioned at end, and described perforation header is positioned at described catchment area, and the water outlet gravel bed is placed in described catchment area.
Preferably, described one-level wetland plant bed and/or secondary wetland plant bed top also have top soil.
Preferably, the length of described secondary wetland plant bed is 1.5 times of one-level wetland plant bed.
Adopt classification root of the present invention district sewage treatment ecological artificial wet land system, by planting the infiltration wetland of horizontal bacteria bed, wetland plant bed structures at different levels are single, build Simple fast, do not exist layer and fault position to hand over mixed problem during use, utilize physics, chemistry, the biological triple synergies of soil, artificial dielectric, plant, microorganism, sewage, mud are processed, to COD
Cr, BOD
5, SS, NH
3The processing efficiency of-N, TP etc. all can reach 80%～95%, and treatment effect is superior.
Description of drawings
Fig. 1 illustrates the structural representation of a kind of embodiment of the present invention;
Fig. 2 illustrates the effluent stream of a kind of embodiment of the present invention to synoptic diagram;
The Reference numeral name is called among each figure: 1. pretreatment pool 2. water inlet distributing flues 3. wetland plants 4. one-level wetland plant beds 5. secondary wetland plant beds 6. water outlet gravel beds 7. water collecting basins 8. regulation of level locks 9. bottoms 10. base plates, 11. perforation headers.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
A kind of classification root of the present invention district sewage treatment ecological artificial wet land system, comprise the pretreatment pool 1, water inlet distributing flue 2, one-level wetland plant bed 4, secondary wetland plant bed 5 and the water collecting basin 7 that connect successively, it is characterized in that: place gravel bed 9 in the described one-level wetland plant bed 4, place sand stone layer 10, the wetland plant 3 of all having planted on described one-level wetland plant bed and the secondary wetland plant bed in the secondary wetland plant bed 5.
Pretreatment pool mainly adopts the chemical process of prior art that sewage is carried out pre-treatment, with descending sewage disposal to BOD
5≤ 80mg/L, COD
Cr≤ 200mg/L, SS≤60mg/L, NH
3After evenly distributing, sewage after-N≤25mg/L, TP≤5mg/L will process by water inlet distributing flue 2 again enters in the one-level wetland plant bed 4, as seen from Figure 2, water inlet distributing flue 2, one-level wetland plant bed 4, the width of secondary wetland plant bed 5 and water collecting basin 7 can be set to identical, make things convenient for the effluent stream Uniform Flow, increase treated side.
Described BOD
5(Biochemical Oxygen Demand) is illustrated under the aerobic conditions, the quantity of the free oxygen that organism consumes in the aerobic microbiological oxygenolysis unit bodies ponding, and measure unit is the mg/L of oxygen level; COD
Cr(Chemical Oxygen Demand) chemical oxygen demand, expression are with the amount of oxygen that consumes during aerobic pollution matter in chemical oxidizing agent (such as potassium permanganate, the potassium bichromate) oxidizing water, and measure unit is mg/L; What of the water yield are the quality that SS characterizes the residue that sewage water filtration is obtained account for, and unit can be mg/L; TP characterizes the total phosphorus content in the sewage, and NH3-N characterizes the ammonia-nitrogen content index in the sewage, and measure unit also all is mg/L.
The filtering layer of one-level wetland plant bed is gravel bed, the filtering layer of secondary wetland plant bed is sand stone layer, the particle diameter of gravel bed is larger, solid impurity to larger particles is tackled absorption, the horizontal flow of current can be accelerated in larger gap, and the sand stone layer particle diameter is less, and secondary wetland plant bed filtering layer gap is less, for example the particle diameter of gravel bed 9 is 15 ~ 40 millimeters, and the particle diameter of sand stone layer 10 is 1 ~ 3 millimeter.Current flow velocity in secondary wetland plant bed slows down, and has increased the residence time of sewage in filtering layer, can play better adsorption effect to more short grained solid impurity, and the long residence time is conducive to the biological and chemical absorption to impurity in the sewage.All plant on the two-stage wetland plant bed and be implanted with wetland plant 3, by Root of Wetland Plants the impurity in the sewage is carried out biological adsorption, Root of Wetland Plants stretches into filtering layer simultaneously, and filtering layer is played certain fastening effect, is beneficial to the shape of in use keeping filtering layer.Wetland plant can be the convenient waterplant that grows under Wetland Environment, such as reed, Canna generalis Bailey, calamus etc.; Also can be that the surviving rates such as Herba Eichhorniae, Scirpus tabernaemontani, barnyard grass grass are high, well developed root system, the emergent that growth cycle is long.
The present invention adopts single gravel or sand stone layer setting to the filtering layer of two-stage wetland plant bed, places simple and conveniently, by filtering layer suspended substance is stopped circuitously, utilizes Root of Wetland Plants to absorb and reaches the purpose of removing most of impurity in the sewage.
The suspended substance of one-level wetland plant bed Filtration Adsorption large-size, secondary wetland plant bed adsorbs absorption to less suspended substance and the solute in the sewage, current are slowed down in secondary wetland plant bed horizontal velocity, the adsorption treatment ability is strengthened, therefore suitably lengthen the horizontal length of secondary wetland plant bed, the length that secondary wetland plant bed preferably is set is 1.5 times of one-level wetland plant bed length, can obtain preferably scrubbing effect.
Preferably, the water level of described water collecting basin can be regulated, and also comprises the water level control apparatus that can regulate water level.According to the hydraulic pressure principle, water collecting basin 7 water levels are identical with the water level of secondary wetland plant bed, regulate the water collecting basin water level and be adjusting secondary wetland plant bed water level, regulation of level is different according to season, consider sewage and come the water yield, the factor such as steam output and pretreatment technology needs, secondary wetland plant bed water level is regulated, the present invention regulates the water collecting basin water level by regulation of level lock 8 is set in water collecting basin, as shown in Figure 1, the regulation of level lock is lift, and the water level of water collecting basin is set by the height of regulating regulation of level lock 8.
Preferably, described one-level wetland plant bed and/or secondary wetland plant bed pond bottom sloping are 2%-3%, are conducive to flowing of water and collection by the gradient is set, and the per-cent of describing the gradient represents the ratio of sloping vertical height and sloping horizontal length.
Preferably, described one-level wetland plant bed water surface elevation is higher than secondary wetland plant bed water surface elevation.
Preferably, described one-level wetland plant bed bottom surface height is higher than secondary wetland plant bed bottom surface height.
The water surface by two-stage wetland plant bed is set or the difference of altitude of bottom surface are conducive to flowing in order of sewage.Preferred heights can be set to 30 centimetres, highly has big difference to be unfavorable for control manufacturing two-stage wetland plant bed cost.
Behind the sewage process secondary wetland plant bed, flowing to water collecting basin discharges from water collecting basin, the present invention arranges perforation header 11 in the terminal bottom of secondary wetland plant bed and collects the sewage that secondary wetland plant bed is processed, the perforation header outlet be connected with water collecting basin, with the collection processing after sewage discharged to water collecting basin.Described perforation header is that very lacunary water pipe is arranged on the sidewall, collects sewage by these apertures, can use the lower cost materials manufacturing perforation headers such as PVC; As shown in Figure 2, perforation header 11 comprises lateral collection pipe and vent pipe two portions, the width of lateral collection pipe is identical with secondary wetland plant bedside degree, be beneficial to the sewage of collecting after secondary wetland plant bed is processed, vent pipe one end is connected with lateral collection pipe middle part, perpendicular direction is in the lateral collection pipe, and the other end of vent pipe is connected to water collecting basin as the outlet of perforation collection tube.
Preferably, in the residing catchment area of perforation header, place water outlet gravel bed 6, the prime cost of water outlet gravel bed 6 is the larger gravels of particle diameter, quickening is beneficial to the sewage of collecting after secondary wetland plant bed is processed in the flow velocity of catchment area, and grain size of gravel is larger simultaneously, it is inner also to be difficult for entering the perforation header by aperture on the perforation header 11, stops up perforation header 11.
Preferably, described one-level wetland plant bed and/or secondary wetland plant bed top also have top soil.Top soil can be thinner thickness, and one deck mud of 5 cm thicks for example is convenient to the growth of wetland plant 3 and is adhered to.
The present invention passes through the flattening of conventional composite filtering layer, being split as two-stage single component pond filters, planting aquatic plants is strengthened biological and root system absorption interception on each pond, actual root quantity and the root system quality of adsorption that has strengthened waterplant on the basis of conventional composite layer.Increase the planting density of waterplant, for example reach every square meter water surface planting 10 strains or above reed, the waterplant such as calamus, or the floating class vegetal cover area such as Herba Eichhorniae reaches more than 75% better effects if.
The contriver carries out the scrubbing operation to sanitary sewage and production waste by classification root of the present invention district sewage treatment ecological artificial wet land system by experiment, measures scrubbing front and back COD
Cr, BOD
5, SS, NH
3The content of-N, TP etc., the result who obtains as shown in Table 1 and Table 2.Table 1 and table 2 show that to sanitary sewage and production waste, processing efficiency all can reach 80%～95%.
Table 1 sanitary sewage disposal
| Sequence number | The water quality project | Water inlet (mg/L) | Pre-treatment (mg/L) | Wetland effluent (mg/L) | Clearance (%) |
| 1. | BOD 5 | 120 | 75 | 9 | 92.50% |
| 2. | COD cr | 300 | 180 | 45 | 85.00% |
| 3. | SS | 100 | 55 | 9 | 91.00% |
| 4. | NH 3-N | 35 | 21 | 4 | 88.57% |
| 5. | TP | 10 | 4.5 | 0.5 | 95.00% |
Table 2 production waste is processed
| Sequence number | The water quality project | Water inlet (mg/L) | Pre-treatment (mg/L) | Wetland effluent (mg/L) | Clearance (%) |
| 6. | BOD 5 | 110 | 65 | 9 | 91.82% |
| 7. | COD cr | 380 | 186 | 46 | 87.89% |
| 8. | SS | 80 | 50 | 9 | 88.75% |
| 9. | NH 3-N | 25 | 20 | 3 | 88.00% |
| 10. | TP | 6 | 3.5 | 0.4 | 93.33% |
Adopt classification root of the present invention district sewage treatment ecological artificial wet land system, by planting the infiltration wetland of horizontal bacteria bed, wetland plant bed structures at different levels are single, build Simple fast, do not exist layer and fault position to hand over mixed problem during use, utilize physics, chemistry, the biological triple synergies of soil, artificial dielectric, plant, microorganism, sewage, mud are processed, to COD
Cr, BOD
5, SS, NH
3The processing efficiency of-N, TP etc. all can reach 80%～95%, and treatment effect is superior.
Previously described is each preferred embodiment of the present invention; design parameter among described embodiment and the embodiment only is the invention proof procedure for clear statement contriver; be not to limit scope of patent protection of the present invention; scope of patent protection of the present invention still is as the criterion with its claims; the equivalent structure that every utilization specification sheets of the present invention and accompanying drawing content are done changes, and in like manner all should be included in protection scope of the present invention.
Claims (10)
1. classification root district sewage treatment ecological artificial wet land system, comprise the pretreatment pool (1), water inlet distributing flue (2), one-level wetland plant bed (4), secondary wetland plant bed (5) and the water collecting basin (7) that connect successively, it is characterized in that: place gravel bed (9) in the described one-level wetland plant bed (4), place sand stone layer (10), the wetland plant (3) of all having planted on described one-level wetland plant bed (4) and the secondary wetland plant bed (5) in the secondary wetland plant bed (5).
2. classification root as claimed in claim 1 district sewage treatment ecological artificial wet land system, it is characterized in that: described water collecting basin also comprises the water level control apparatus that can regulate water level.
3. classification root as claimed in claim 2 district sewage treatment ecological artificial wet land system, it is characterized in that: described water level control apparatus is regulation of level lock (8).
4. classification root as claimed in claim 1 district sewage treatment ecological artificial wet land system, it is characterized in that: described one-level wetland plant bed (4) and/or secondary wetland plant bed (5) pond bottom sloping are 2%-3%.
5. classification root as claimed in claim 1 district sewage treatment ecological artificial wet land system, it is characterized in that: described one-level wetland plant bed (4) water surface elevation is higher than secondary wetland plant bed (5) water surface elevation.
6. classification root as claimed in claim 1 district sewage treatment ecological artificial wet land system, it is characterized in that: described one-level wetland plant bed (4) bottom surface height is higher than secondary wetland plant bed (5) bottom surface height.
7. classification root as claimed in claim 1 district sewage treatment ecological artificial wet land system, it is characterized in that: described secondary wetland plant bed (5) also comprises the perforation header (11) that is positioned at terminal bottom, and the outlet of described perforation header (11) is connected with described water collecting basin (7).
8. classification root as claimed in claim 7 district sewage treatment ecological artificial wet land system, it is characterized in that: described secondary wetland plant bed (5) also comprises the catchment area that is positioned at end, described perforation header (11) is positioned at described catchment area, and water outlet gravel bed (6) is placed in described catchment area.
9. classification root as claimed in claim 1 district sewage treatment ecological artificial wet land system, it is characterized in that: described one-level wetland plant bed (4) and/or secondary wetland plant bed (5) top also have top soil.
10. classification root as claimed in claim 1 district sewage treatment ecological artificial wet land system, it is characterized in that: the length of described secondary wetland plant bed (5) is 1.5 times of one-level wetland plant bed (4).
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Cited By (7)
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| CN103241899A (en) * | 2013-05-06 | 2013-08-14 | 武汉昌宝环保工程有限公司 | In-situ reduction or control method of sewage discharged from sewage discharge outlet |
| CN104843948A (en) * | 2015-05-20 | 2015-08-19 | 苏交科集团股份有限公司 | Treatment device and treatment method for sewage in highway service area |
| CN105174472A (en) * | 2015-09-17 | 2015-12-23 | 北京市农林科学院 | Kitchen sewage treatment device |
| CN105439381A (en) * | 2016-02-17 | 2016-03-30 | 重庆阁林环保科技有限公司 | Ecological wetland system used for purifying and restoring contaminated water body |
| CN109292988A (en) * | 2018-10-23 | 2019-02-01 | 山东省环科院环境工程有限公司 | A kind of drowned flow artificial wet land and its operation method that anti-clogging emptying is constructed |
| CN109796108A (en) * | 2019-02-26 | 2019-05-24 | 河南省正大环境科技咨询工程有限公司 | A kind of artificial wet land treating system for deep purification of waste water |
| CN110330108A (en) * | 2019-07-29 | 2019-10-15 | 贵州民族大学 | Integrated under-current artificial wetland sewage treatment method and equipment |
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Application publication date: 20130123 |