CN1872738A - Method and installation for treating domestic sewage by using artificial wetland - Google Patents
Method and installation for treating domestic sewage by using artificial wetland Download PDFInfo
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- CN1872738A CN1872738A CNA2006100857886A CN200610085788A CN1872738A CN 1872738 A CN1872738 A CN 1872738A CN A2006100857886 A CNA2006100857886 A CN A2006100857886A CN 200610085788 A CN200610085788 A CN 200610085788A CN 1872738 A CN1872738 A CN 1872738A
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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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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
This invention relates to a combined vertical flow-vertical deflection wet land treatment technique for domestic wastewater. The technique comprises a pretreatment system and an artificial wet land system. The pretreatment system is mainly aim to removing the floating matters and precipitable suspended matters in domestic wastewater. The artificial wet land system is composed of combined vertical flow-vertical deflection in series. The invention has high removing rate on COD, N and P in domestic wastewater.
Description
Technical field
The present invention relates to one way of life sewage water treatment method and device thereof, especially a kind of method and device thereof that utilizes Sewage treatment in constructed wetland.
Background technology
Artificial swamp is the Novel waste water treatment technology that grows up the 1970s and 1980s in last century, because it has high efficiency, low investment, low running expense, the low technology of keeping, and to advantages such as the removal effect of nitrogen, phosphorus are good, in worldwide, obtained using more and more widely.
In general artificial swamp is mainly by artificial substratum, water plant and the composition of the microorganism. In artificial wet land system, pollutant is physics, chemistry and the biological triple coordinative roles by filler-microorganism-plant complex ecosystem mainly, decompose to realize high-efficient purification to waste water by filtration, absorption, precipitation, ion-exchange, plant absorbing and microorganism. Simultaneously, by the biogeochemical cycle of nutriment and moisture, promote the green plants growth and make its volume increase, the resource of realization waste water and innoxious.
According to the difference of water flow mode in the wetland, artificial swamp mainly is divided into three types: surperficial streaming, undercurrent type and vertical streaming.
Surface current artificial wetland and natural wetland are similar, and the depth of water is relatively shallow, and generally at 0.2～0.4m, waste water is from the surface water flow mistake. Such artificial swamp has small investment, simple to operate, the advantage such as operating cost is low, but floor space is larger, and hydraulic loading rate is less, and dirt-removing power is limited. Oxygen mainly provides by water surface diffusion, the transmission of root system of plant and the photosynthesis of plant in the free flow surface constructed wetland, but transmittability is very limited. The operation climate impact of such wet land system is larger, and the phenomenon of multiplying mosquitos and flies is arranged summer.
Current wetland is comprised of one or more packed beds, bed body filling substrate, and the bed end, be provided with impervious barrier to prevent underground water pollution, and sewage flows in the space of filler, exists without table. Compare with free flow surface constructed wetland, the hydraulic load of horizontal drowned flow artificial wet land is large and pollutional load is large, removal effect to contamination indexs such as BOD, COD, SS, heavy metals is good, and foul smelling and multiply the mosquitos and flies phenomenon seldom, good heat insulation effect is also arranged winter, yet the oxygen in the current wetland mainly relies on the supply of root system of plant, so the nitrification of this type wetland is not ideal enough. At present, horizontal drowned flow artificial wet land is widely used by countries such as the U.S., Japan, Australia, Germany, Sweden, Britain, Holland and Norway.
In the vertical-flow wetland, sewage flows to the bottom of packed bed from the wetland surface longitudinal, and oxygen can enter artificial wet land system by Atmospheric Diffusion and plant transmission. The nitrification ability of vertical subsurface flow wetland is higher than horizontal subsurface flow wetland, can be used for processing the higher sewage of ammonia-nitrogen content. Its shortcoming is that the organic matter removal ability is not so good as the horizontal drowned flow artificial wet land system, and the dried/waterflooding time that falls is longer, and the control relative complex has the phenomenon of multiplying mosquitos and flies summer.
The applicant has proposed a kind of new artificial wet land sewage treating process and device, and this device has preferably denitrification effect, can be for promoting the use of.
Summary of the invention
That the objective of the invention is to exist for the Sewage treatment in constructed wetland of existing single-mode or nitrification is not good, the problem of perhaps denitrification deficiency provides a kind of method and device thereof that utilizes Sewage treatment in constructed wetland.
Technical scheme of the present invention is:
A kind of method of utilizing Sewage treatment in constructed wetland, it may further comprise the steps:
At first sanitary sewage is carried out preliminary treatment through grid and sedimentation basin, but remove wherein floating thing and settling suspension thing;
Then will introduce in the first order composite vertical current artificial wetland through pretreated sanitary sewage, make its through vertical partition plate one side by surface grafting by the water distribution deodorization floor of emergent aquactic plant and the downstream district that formed by the sub-treatment region of green stone, passage by the vertical partition plate bottom enters in the up district that is comprised of coarse sand stone flour treatment region and Free water tagma of vertical partition plate opposite side, in the Free water tagma, plant planting submerged plant, set out the water hole at the setting liquid level place in Free water tagma simultaneously;
The 3rd, will through the sanitary sewage in the Free water tagma that is arranged in up district after processing in the composite vertical current artificial wetland from discharge outlet enter one adjacent with composite vertical current artificial wetland, be provided with the vertical baffling underflow type artificial wet land that some vertical baffling plates and kind are implanted with emergent aquactic plant, sanitary sewage is further processed, then collected and discharged by the drainpipe that is attached thereto by the perforation collector pipe that is located at wetland end bottom.
A kind of device of processing sanitary sewage, comprise the pretreatment unit and the artificial swamp that are formed by grid, sedimentation basin, it is characterized in that described artificial swamp is comprised of the vertical baffling underflow type artificial wet land 13 that a composite vertical current artificial wetland 12 and is adjacent, described composite vertical current artificial wetland 12 is separated into sanitary sewage descender and the up district of sanitary sewage by vertical partition plate 6, and the sanitary sewage descender is formed and planted by bulky grain water distribution deodorization layer 1 and the sub-treatment region 2 of green stone and is implanted with emergent aquactic plant 11; The up district of sanitary sewage is comprised of the sub-treatment region 2 of green stone, coarse sand stone flour treatment region 3, the Free water tagma 5 that are positioned at the bottom successively, the sub-treatment region 2 of green stone in the up district of sanitary sewage descender and sanitary sewage connects and forms the sanitary sewage passage in the bottom of dividing plate 6,5 kinds are implanted with submerged plant 4 in the Free water tagma, setting liquid level place in Free water tagma 5 is provided with discharge outlet 14, and the delivery port of drainpipe 14 is higher than the surface of adjacent vertical baffling underflow type artificial wet land 13; In described vertical baffling underflow type artificial wet land 13, plant and be implanted with emergent aquactic plant 11, and be provided with some dividing plates 6 that directly link to each other with Chi Ding or pond dolly respectively, described dividing plate 6 is separated into descending vertical subsurface flow district and up vertical subsurface flow district with the sub-treatment region 2 of green stone wherein, perforation collector pipe 9 is installed near the descending vertical subsurface flow district of discharge outlet 10 or up vertical subsurface flow district, this perforation collector pipe 9 links to each other with drainpipe 10, and the height of discharge outlet 16 can be controlled the depth of water in the current wetland.
In the bottom of described composite vertical current artificial wetland 12 and vertical baffling underflow type artificial wet land 13 corresponding evacuated tube 8 and bearing 7 are installed all.
Emergent aquactic plant of the present invention can be reed, the hay grass, and cyperus alternifolius, canna and calamus, described submerged plant spring and summer can be hydrilla verticillata, watermifoil, p.malaianus, comb tooth bog pondweed, eel grass autumn, can be waterweed and water caltrop winter.
Sewage treatment unit of the present invention mainly is comprised of grid, preliminary sedimentation tank, wet land treating system three parts, and specifically handling process is as shown in Figure 1:
Wherein:
Grid: mainly be the floating thing of removing large volume, in order to avoid subsequent treatment is impacted.
Preliminary sedimentation tank: but mainly remove inorganic particle and the settling suspension things such as sand.
The artificial swamp processing unit: this unit is the core of whole invention, and the below is the detailed description of this unit. This unit is comprised of vertical-flow wetland and current wetland two parts, shown in Fig. 2 (being ground type as example take vertical current and current wetland).
Vertical-flow wetland is the composite vertical current wetland, namely this wetland is divided into downstream district and upstream district by central dividing plate, the sewage downstream district that flows through at first from top to bottom, then the perforated wall by the central dividing plate bottom enters the upstream district, does from the bottom to top the upwelling motion in this zone. Downstream district depth of packing is 70cm, be divided into as two-layer: the upper strata filler is the superelevation district, thickness is 10cm, particle diameter is 3-5cm, this packing layer mainly plays by two effects: 1) be assigned to uniformly sewage in the wet land system, 2) with the level control of water inlet in the bottom in this district, can reduce the impact that the stink because of raw sewage causes to surrounding environment, can reduce multiplying of mosquitos and flies in summer simultaneously. Lower thickness is 60cm, and this layer is treatment region, and packing material size is 1-2cm, and this district's filler is green stone for building. This district's institute Plants can be the water plants such as reed, hay grass, calamus, and these plants can absorb the pollutants such as nitrogen phosphorus in the water body and COD on the one hand, on the other hand, can provide oxygen to wet land system, thus the Degradation and Transformation of assurance pollutant; Upstream is divided into three layers: lower thickness is 10cm, filler is green stone of particle diameter 1-2cm, intima-media thickness is 20cm, filler is the mixture of coarse sand and bluestone powder, mixed proportion between the two is (1-2): 1, the upper strata is the Free water tagma, this region height is 30cm, the selected plant in upstream pond is submerged plant, in middle filler, the root system of submerged plant can absorbed nitrogen phosphorus and the pollutant such as COD, simultaneously can be to the packing layer oxygen supply with submerged plant plantation, the whole plant of submerged plant all is immersed in the water, can be by photosynthesis to oxygen supply of water body in the pollutants such as absorbed nitrogen, phosphorus and COD. But the selection reference table 1 of submerged plant.
The submerged plant table that table 1 can Gong be selected
| Plant name | Section belongs to | China distributes | Ecological habit |
| Black algae | Hydrocharctaceae is deceived Trentepohlia | Various places, China north and south all have | Have and adapt to the ability that water body environment changes, can be grown in that illumination is strong, muddy, in the water body of poor nutrition or eutrophication, be the 3-11 month growth period. |
| Watermifoil | The Haloragaceae Myriophyllum | All there is distribution each provinces and regions of China | Adaptive faculty is stronger, is born in the freshwaters such as lake, pond, irrigation canals and ditches and can effectively removes water body N and P. |
| P.malaianus | The Potamogetonaceae Potamogeton | All there is distribution various places, China north and south | All can grow in hydrostatic, the moving water, be the 3-11 month in wetland growth period of also can growing, and can effectively remove water body N and P. |
| Comb tooth bog pondweed | The Potamogetonaceae Potamogeton | All there is distribution various places, China north and south | Ecological ampliture is wide, is adapted to oligotrophic and grows to the super eutrophic water body, and all have in fresh water and seawater and long-livingly can effectively remove water body N and P. |
| Waterweed | Hydrocharctaceae | Originating in America plants for introducing | Poisons in freshwater, growth period be the Winter-Spring to early summer, be one of biomaterial of purifying waste water winter preferably, can effectively remove water body N and P. |
| Water caltrop | The Potamogetonaceae Potamogeton | All there is distribution various places, China north and south | Be born in pond, ditch, rice terrace, feed ditch and the unhurried current river, water body is little acid to neutral more, can as usual grow in the subglacial water body winter and can effectively remove water body NP and COD. |
| Eel grass | The Hydrocharctaceae Vallisneria | China's the South and the North all has distribution | Adaptability to water quality is stronger, and happiness alkalescent water quality adapts to water temperature below 24 ℃, does not like high temperature, cold-resistant, happiness high light can effectively be removed water body N and P. |
Wherein be generally spring, summer, Qiu Sanji the growth period of hydrilla verticillata, watermifoil, p.malaianus, comb tooth bog pondweed, eel grass, and waterweed and water caltrop belong to low temperature resistant plant, the existence of can surviving the winter. Therefore submerged plant is adopted the mode of interplanting, has both comprised wherein namely that spring, summer, three season of autumn growing plants also comprised overwintering plant, and can make like this has plant growth the whole year, more be conducive to the treatment effect of the system that guarantees. The sewage of processing through vertical-flow wetland enters current wetland by the downflow weir of pool wall one side in upstream district. The composite vertical current wetland is generally ground type, and the ground proximity place arranges evacuated tube in the bottom in up pond, and when safeguarding, with this pond emptying, this pond adopts brick mix structure to build.
Drowned flow artificial wet land adopts the vertical baffling structure, namely by dividing plate current wetland is divided into some lattice, the upper edge of adjacent separator and lower edge are divided and alternately are provided with water hole, sewage flows through in water hole, can make like this sewage in whole current wetland, make up and down baffling, be conducive to give full play to the work of whole wet land filler in order to improve treatment effect. The total depth of current wetland is 70-80cm, its at the middle and upper levels 20cm be soil horizon, as the plantation layer of plant, simultaneously can remove a part of pollutant, the 50-60cm of lower floor is treatment region, filler is selected green stone, particle diameter is 1-2cm. Selected plant can be reed, hay grass, calamus etc. in the current wetland. The water-out manners of current wetland has two kinds: 1) laying perforated pipe near at the bottom of the pond of wetland end, the mid portion of perforated pipe is installed threeway, connecting outlet pipe by threeway wears pool wall at the bottom of the pond and goes out, the 90 degree elbows that make progress at the other end installation outlet of outlet pipe, on connect vertical telescopic tube, regulate the depth of water in wetland by this telescoping tube; 2) directly at the differing heights of pool wall outlet pipe and mounting ball valve are installed, can be by the depth of water in the open to shut to regulate wetland of differing heights ball valve. In whole wetland bottom, lay perforated pipe along the pond length direction by pool wall, perforated pipe passes all dividing plates (carrying out antiseepage) and terminal pool wall outside the pond, controls switching with ball valve, opens ball valve when safeguarding, and emptying wetland is closed ball valve when normally moving. Current wetland can be ground type, and semi-underground type and underground type adopt the mixed structure of brick, and ground has the gradient of the tendency water side of 2-3%. The water inlet end elevation of current wetland should than the low at least 20cm in composite vertical current water side, guarantee that the water outlet of composite vertical current can enter in the current wetland smoothly.
In wetland unit, the removal approach that major pollutants are is as follows:
1) removal of COD. COD can be utilized by plant absorbing in whole wetland unit, simultaneously can be by heterotrophic microorganism in the wet land system as carbon source and using energy source.
2) removal of nitrogen-containing compound. In the downstream pond of vertical-flow wetland and the packing area of upstream, near plant root system part, organic nitrogen and ammonia nitrogen and nitrite nitrogen can be oxidized to nitrate nitrogen, and at anoxic and anaerobic zone away from root system, the nitrate nitrogen that carries in the former water and oxidation generates is reduced into nitrogen and removes; In the Free water tagma of upstream, the oxidation reaction of organic nitrogen, ammonia nitrogen and nitrite nitrogen mainly occurs; In whole current wetland, can pass through nitration denitrification denitrogenation; Ammonia nitrogen and a nitre nitrogen part can be utilized by plant and microorganism.
3) removal of phosphorus-containing compound. Organophosphor can be by inorganicization of microorganism, and Phos is utilized by plant and microorganism in whole pond simultaneously being removed with green stone and stone flour generation calcium phosphate precipitation in whole pond.
The present invention has the following advantages:
1, existing composite vertical current wetland is improved, at the Free water tagma in upstream pond kind planting submerged plant, can effectively improve the content of this zone dissolved oxygen, thereby be conducive to the carrying out of nitration reaction, for details see attached table result of the test shown in the 7-9.
2, existing underflow type artificial wet land is transformed, added therein flap, increased the tortuosity of current, be conducive to the raising of contaminant removal efficiency.
3, above-mentioned two kinds of wetlands are contacted reach good pollutant removal. The pollutant removal table of comparisons shown in the 1-6 for details see attached table.
Description of drawings
Fig. 1 is domestic sewage treatment process schematic flow sheet of the present invention.
Fig. 2 is the structural representation of artificial swamp of the present invention.
Fig. 3 is the structural representation that forms composite vertical current wetland of the present invention.
Fig. 4 is the structural representation that forms the latent ground of vertical baffling undercurrent of the present invention.
The specific embodiment
The present invention is further illustrated for following structure drawings and Examples.
The technological process of present embodiment as shown in Figure 1.
A kind of method of utilizing Sewage treatment in constructed wetland, it may further comprise the steps:
At first sanitary sewage is carried out preliminary treatment through grid and sedimentation basin, but remove wherein floating thing and settling suspension thing;
Then will introduce in the first order composite vertical current artificial wetland through pretreated sanitary sewage, make its through vertical partition plate one side by surface grafting by the water distribution deodorization floor of emergent aquactic plant and the downstream district that formed by the sub-treatment region of green stone, passage by the vertical partition plate bottom enters in the up district that is comprised of coarse sand stone flour treatment region and Free water tagma of vertical partition plate opposite side, in the Free water tagma, plant planting submerged plant, be provided with delivery port in the setting liquid level position in Free water tagma simultaneously;
The 3rd, will through the sanitary sewage in the Free water tagma that is arranged in up district after processing in the composite vertical current artificial wetland from drainpipe enter one adjacent with composite vertical current artificial wetland, be provided with the vertical baffling underflow type artificial wet land that some vertical baffling plates and kind are implanted with emergent aquactic plant, sanitary sewage is further processed, then collected and discharged by the drainpipe that is attached thereto by the perforation collector pipe that is located at wetland end bottom.
The life treating apparatus of present embodiment, comprise the pretreatment unit and the artificial swamp that are formed by grid, sedimentation basin, wherein grid, sedimentation basin are same as the prior art, artificial swamp wherein is comprised of the vertical baffling underflow type artificial wet land 13 (such as Fig. 4) that a composite vertical current artificial wetland 12 (such as Fig. 3) and is adjacent, described composite vertical current artificial wetland 12 is separated into sanitary sewage descender and the up district of sanitary sewage by vertical partition plate 6, and the sanitary sewage descender is formed and planted by bulky grain water distribution deodorization layer 1 and the sub-treatment region 2 of green stone and is implanted with emergent aquactic plant 11; The up district of sanitary sewage is comprised of the sub-treatment region 2 of green stone, coarse sand stone flour treatment region 3, the Free water tagma 5 that are positioned at the bottom successively, the sub-treatment region 2 of green stone in the up district of sanitary sewage descender and sanitary sewage connects and forms the sanitary sewage passage in the bottom of dividing plate 6,5 kinds are implanted with submerged plant 4 in the Free water tagma, setting hydraulic height place in Free water tagma 5 is equipped with drainpipe 14, and the delivery port of drainpipe 14 is higher than the surface of adjacent vertical baffling underflow type artificial wet land 13; In described vertical baffling underflow type artificial wet land 13, plant and be implanted with emergent aquactic plant 11, and be provided with some dividing plates 6 that directly link to each other with Chi Ding or pond dolly respectively, described dividing plate 6 is separated into descending vertical subsurface flow district and up vertical subsurface flow district with the sub-treatment region 2 of green stone wherein, in the position near wetland end bottom perforation collector pipe 9 is installed, this perforation collector pipe 9 links to each other with drainpipe 10, the height of discharge outlet 16 can be used for controlling the depth of water in the current wetland, as shown in Figure 2.
Above-mentioned emergent aquactic plant can be reed, the hay grass, cyperus alternifolius, the combination of one or more in canna and the calamus, described submerged plant spring and summer can be one or more the combination in hydrilla verticillata, watermifoil, p.malaianus, comb tooth bog pondweed, the eel grass autumn, can be a kind of or its combination in waterweed and the water caltrop winter.
Below in conjunction with a concrete making example the present invention is further described, the size that provides is only for reference, and it does not consist of the restriction of the present invention being protected content. Such as Fig. 2, artificial swamp of the present invention is comprised of two-stage, and the first order is composite vertical current wetland 12, and the second level is vertical baffling underflow type artificial wet land 13. It is the processing of 5mm PVC plate that the two-stage wetland all adopts thickness. Wherein, composite vertical current wetland 12 is divided into two lattice, and every lattice are of a size of L * W * H=500 * 500 * 500 (mm), and water seam UNICOM was passed through in the bottom, and crossing the water gap width is 50mm. Zuo Banchi in the composite vertical current wetland is downstream tank, and this pool inner water flows from top to bottom; The right side is the upstream pond, water flows from bottom to top, 400mm place at the bottom of the pond opens even drainpipe 14 at the pool wall in this pond, water is the cloth tank on vertical baffling underflow type artificial wet land 13 surfaces by the second level wetland that the apopore overflow on the drainpipe 14 enters perforate surface, and entering second level wetland by this groove stream with uniform distribution is vertical baffling underflow type artificial wet land 13. Establish evacuated tube 8 at the bottom of the downstream tank, when safeguard in the pond, can be with pond water emptying; Vertical baffling underflow type artificial wet land 13 is of a size of L * W * H=1500 * 500 * 500 (mm), full pond is divided into 5 lattice by 4 dividing plates vertical with the bottom surface 6, wherein stitched along opening water under the 1st and No. 3 dividing plate, the seam height is 50mm, upper edge is concordant with the top, pond, and the 2nd and 4 plate hight is 350mm, and lower edge and pond back welding connect sealing, 2nd, establish evacuated tube 8 at the bottom of the 4 and 5 lattice ponds, function is the same. The pond end is established perforation collector pipe 9, and delivery port 16 height are 400mm at the bottom of the pond, and water is vertical baffling between the dividing plate 6 in this pond.
Vertical baffling underflow type artificial wet land 13 used fillers all are green stone. Wherein the downstream pond filler of composite vertical current wetland 12 divides two-layerly, and upper level is 100mm, packing material size d=30～50mm; Lower layer height is 400mm, packing material size d=5～10mm; Upstream pond filler also is divided into two-layer, and lower layer height is 100mm, packing material size d=5～10mm, and upper level is 150mm packing material size d=0.1～5mm, the packing layer top is the free water body of 150mm. Downstream pond packed height exceeds downstream pond table 100mm.
Plant in the wetland mainly comprises two large classes: emergent aquactic plant and submerged plant. Downstream pond and vertical baffling underflow type artificial wet land 13 plantation reeds at composite vertical current wetland 12, and mainly plant submerged plant in the upstream district of composite vertical current, described submerged plant spring and summer autumn is hydrilla verticillata, watermifoil, p.malaianus, comb tooth bog pondweed, eel grass, and be waterweed and water caltrop winter.
Below be of the present invention one concrete experimentation, can find out that from experimental data wherein the present invention compared with prior art has obvious progress.
Test water is artificial simulated wastewater, and the water distribution main component is NH4Cl、KH
2PO
4And C6H
12O
6Because used nitride only is NH among the artificial distribution of this test4 +-N under the effect of microorganism, mainly is converted into NO in wet land system2 --N and NO3 --N is so think that the TN in the wetland water body consists predominantly of NH4 +-N、NO
2 --N and NO3 -So-N is TN=NH in this test4 +-N+NO
2 --N+NO
3 --N adopts peristaltic pump control flow, HRT=4.5d. Test period is 25 days, during take a sample altogether ten times, measure Inlet and outlet water CODCr、NH
4 +-N、NO
2 --N、NO
3 --N and PO4 3--P measures composite vertical current wetland upstream district DO and NO three times at random2 --N、NO
3 --N all shifts out the submerged plant in the vertical-flow wetland upstream district afterwards, measures DO and NO three times2 --N、NO
3 --N. Test data sees the following form
Table 1, NH4 +-N removal effect
| The sampling number of times | Water inlet (mg/L) | Water outlet (mg/L) | Clearance (%) |
| 1 | 41.6 | 3.0 | 92.8 |
| 2 | 41.8 | 3.9 | 90.7 |
| 3 | 46.1 | 4.0 | 91.3 |
| 4 | 40.4 | 4.7 | 88.4 |
| 5 | 45.3 | 1.7 | 96.3 |
| 6 | 37.8 | 1.1 | 97.2 |
| 7 | 40.2 | 1.1 | 97.2 |
| 8 | 43.0 | 3.1 | 92.3 |
| 9 | 46.3 | 2.7 | 94.1 |
| 10 | 46.0 | 1.9 | 95.8 |
Table 2, water outlet NO2 --N content
| The sampling number of times | Water inlet (mg/L) | Water outlet (mg/L) |
| 1 | 0 | 0.02 |
| 2 | 0 | 0.02 |
| 3 | 0 | 0.03 |
| 4 | 0 | 0.02 |
| 5 | 0 | 0.02 |
| 6 | 0 | 0.03 |
| 7 | 0 | 0.03 |
| 8 | 0 | 0.03 |
| 9 | 0 | 0.02 |
| 10 | 0 | 0.03 |
Table 3, water outlet NO3 --N content
| The sampling number of times | Water inlet (mg/L) | Water outlet (mg/L) |
| 1 | 0 | 0.53 |
| 2 | 0 | 0.58 |
| 3 | 0 | 0.55 |
| 4 | 0 | 0.17 |
| 5 | 0 | 0.3 |
| 6 | 0 | 0.09 |
| 7 | 0 | 0.32 |
| 8 | 0 | 0.36 |
| 9 | 0 | 0.36 |
| 10 | 0 | 0.37 |
Table 4, TN removal effect
| The sampling number of times | Water inlet (mg/L) | Water outlet (mg/L) | Clearance (%) |
| 1 | 41.6 | 3.5 | 91.5 |
| 2 | 41.8 | 4.5 | 89.2 |
| 3 | 46.1 | 4.6 | 90.1 |
| 4 | 40.4 | 4.9 | 87.9 |
| 5 | 45.3 | 2.0 | 95.6 |
| 6 | 37.8 | 1.2 | 96.9 |
| 7 | 40.2 | 1.5 | 96.3 |
| 8 | 43.0 | 3.5 | 91.9 |
| 9 | 46.3 | 3.1 | 93.3 |
| 10 | 46.0 | 2.3 | 94.9 |
Table 5, PO4 3--P removal effect
| The sampling number of times | Water inlet (mg/L) | Water outlet (mg/L) | Clearance (%) |
| 1 | 12.1 | 0.2 | 98.3 |
| 2 | 13.8 | 0.24 | 98.3 |
| 3 | 13.1 | 0.24 | 98.2 |
| 4 | 14.7 | 0.46 | 96.9 |
| 5 | 14.3 | 0.50 | 96.4 |
| 6 | 14.0 | 0.85 | 93.9 |
| 7 | 14.4 | 0.33 | 97.7 |
| 8 | 15.0 | 0.26 | 98.3 |
| 9 | 13.8 | 0.39 | 97.1 |
| 10 | 46.0 | 1.9 | 95.8 |
Table 6, CODCrRemoval effect
| The sampling number of times | Water inlet (mg/L) | Water outlet (mg/L) | Clearance (%) |
| 1 | 164.2 | 10.6 | 93.5 |
| 2 | 162.5 | 14.2 | 91.3 |
| 3 | 159.6 | 14.2 | 91.1 |
| 4 | 166.8 | 14.6 | 91.2 |
| 5 | 137.4 | 16.2 | 88.2 |
| 6 | 172.6 | 20.2 | 88.3 |
| 7 | 170.4 | 12.2 | 92.8 |
| 8 | 177.8 | 9.4 | 94.7 |
| 9 | 171.0 | 13.8 | 91.9 |
| 10 | 167.8 | 12.6 | 92.5 |
Table 7, composite vertical current wetland upstream district DO
| Without submerged plant (mg/L) | Submerged plant (mg/L) is arranged | |
| 1 | 1.2 | 5.7 |
| 2 | 0.8 | 6.2 |
| 3 | 0.5 | 6.8 |
Table 8, composite vertical current wetland upstream district NO2 --N
| Without submerged plant (mg/L) | Submerged plant (mg/L) is arranged | |
| 1 | 0.02 | 0.04 |
| 2 | 0.03 | 0.04 |
| 3 | 0.02 | 0.06 |
Table 9, composite vertical current wetland upstream district NO3 --N
| Without submerged plant (mg/L) | Submerged plant (mg/L) is arranged | |
| 1 | 0.03 | 5.2 |
| 2 | 0.05 | 6.4 |
| 3 | 0.02 | 5.0 |
Claims (4)
1, a kind of method of utilizing Sewage treatment in constructed wetland, it may further comprise the steps:
At first sanitary sewage is carried out preliminary treatment through grid and sedimentation basin, but remove wherein floating thing and settling suspension thing;
Then will introduce in the first order composite vertical current artificial wetland through pretreated sanitary sewage, what make its process vertical partition plate one side is implanted with the water distribution deodorization floor of emergent aquactic plant and the downstream district that is comprised of the sub-treatment region of green stone by kind, passage by the vertical partition plate bottom enters in the up district that is comprised of coarse sand stone flour treatment region and Free water tagma of vertical partition plate opposite side, in the Free water tagma, plant planting submerged plant, set out the mouth of a river at the setting liquid level place in Free water tagma simultaneously;
Then make the life dirt through the Free water tagma that is arranged in up district after the composite vertical current artificial wetland processing enter perforation cloth tank by delivery port, by the cloth tank evenly distribute enter one adjacent with composite vertical current artificial wetland, be provided with some vertical baffling plates and kind is implanted with in the vertical baffling underflow type artificial wet land of emergent aquactic plant, sanitary sewage is further processed, then by being located at the wetland end, the perforation collector pipe that is positioned at the bottom is collected, and is discharged by the drainpipe that is attached thereto.
2, a kind of device of processing sanitary sewage, comprise the pretreatment unit and the artificial swamp that are formed by grid, sedimentation basin, it is characterized in that described artificial swamp is comprised of the vertical baffling underflow type artificial wet land (13) that a composite vertical current artificial wetland (12) and is adjacent, described composite vertical current artificial wetland (12) is separated into sanitary sewage descender and the up district of sanitary sewage by vertical partition plate (6), and the sanitary sewage descender is formed and planted by bulky grain water distribution deodorization layer (1) and the sub-treatment region of green stone (2) and is implanted with emergent aquactic plant (11); The up district of sanitary sewage is comprised of the sub-treatment region of green stone (2), coarse sand stone flour treatment region (3), Free water tagma (5) that are positioned at the bottom successively, the sub-treatment region of green stone (2) in the up district of sanitary sewage descender and sanitary sewage connects and forms the sanitary sewage passage in the bottom of dividing plate (6), kind is implanted with submerged plant (4) in Free water tagma (5), setting liquid level place in Free water tagma (5) is provided with delivery port (14), water enters perforation cloth tank (15) by delivery port (14) overflow, is distributed to uniformly the water inlet end of underflow type artificial wet land (13) by perforation cloth tank (15); In described vertical baffling underflow type artificial wet land (13), plant and be implanted with emergent aquactic plant (11), and be provided with some dividing plates (6) that directly link to each other with Chi Ding or pond dolly respectively, described dividing plate (6) is separated into descending vertical subsurface flow district and up vertical subsurface flow district with the sub-treatment region of green stone (2) wherein, near the place near wetland end bottom perforation collector pipe (9) is being installed, this perforation collector pipe (9) links to each other with drainpipe (10), and the height of discharge outlet (16) can be used for controlling the depth of water in the wetland.
3, processing sanitary sewage disposal artificial swamp according to claim 2 is characterized in that in the bottom of described composite vertical current artificial wetland (12) and vertical baffling underflow type artificial wet land (13) corresponding evacuated tube (8) and bearing (7) being installed all.
4, processing sanitary sewage disposal artificial swamp according to claim 2 is characterized in that described emergent aquactic plant is reed, hay grass, cyperus alternifolius, canna and calamus; Described submerged plant spring and summer autumn is hydrilla verticillata, watermifoil, p.malaianus, comb tooth bog pondweed, eel grass, and be waterweed and water caltrop winter.
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| CN112551802A (en) * | 2020-11-11 | 2021-03-26 | 安徽科技学院 | Energy-saving and environment-friendly sewage treatment device and method |
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| CN100371269C (en) | 2008-02-27 |
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