CN2905775Y - Composite artificial wetland - Google Patents
Composite artificial wetland Download PDFInfo
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- CN2905775Y CN2905775Y CNU2006200227904U CN200620022790U CN2905775Y CN 2905775 Y CN2905775 Y CN 2905775Y CN U2006200227904 U CNU2006200227904 U CN U2006200227904U CN 200620022790 U CN200620022790 U CN 200620022790U CN 2905775 Y CN2905775 Y CN 2905775Y
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- artificial wetland
- wetland
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model relates to the sewage treatment field, which discloses a compound manmade marsh, and comprises a horizontally flowing manmade marsh and a vertically flowing manmade marsh. Wherein, the vertically flowing manmade marsh is at the top and the horizontally flowing manmade marsh is at below, the two are combined to be the compound manmade marsh; the vertically flowing manmade marsh comprises a water bed and a water distributing pipeline; the water bed includes a mixed base, a water distributing pipeline which is distributed under the surface of the mixed base, the bottom of the vertically flowing manmade marsh is connected with the surface of the horizontally flowing manmade marsh. The utility model is used in sewage treatment with each index reaching first level and the area occupying is reduced.
Description
Technical field
The utility model relates to sewage treatment area, is specifically related to a kind of combined artificial wetland that is used to handle city domestic sewage.
Background technology
Municipal effluent combined artificial wetland treatment unit mainly contains horizontal flow and vertical current, vertical current and horizontal flow, vertical current and surface current and four kinds of combined artificial wetlands such as vertical current and vertical current and handles bed at present.
Wherein, horizontal flow and vertical-current compound manual wetting ground handle bed according to horizontal flow preceding, vertical current after mode be together in series horizontal fluidized bed height 80cm, the general gravel matrix of filling in the bed, more than the vertical fluidized bed height 100cm, adopt thinner matrix such as sand etc. usually as filtration media.After sewage was handled through horizontal fluidized bed earlier, gravity flow entered vertical fluidized bed top layer water distribution uniformity, obtained handling in vertical process of oozing down, then nitration treatment effluent recycling to the horizontal fluidized bed of vertical fluidized bed was finished denitrification.Wherein, plant in the horizontal fluidized bed and be implanted with the large-scale emergent that secretes the oxygen ability such as reed, cattail, Scirpus tabernaemontani, cyperus alternifolius, power flower and calamus etc. again.In vertical fluidized bed, plant and be implanted with Canna generalis Bailey, power flower, Chinese rose and Caulis Miscanthis floriduli etc. again.
Vertical current and horizontal flow combined artificial wetland handle bed be according to vertical fluidized bed preceding, horizontal fluidized bed after the mode composite system that is together in series and forms.Vertical current and horizontal fluidized bed height degree and filling substrate are ditto described, and be promptly identical with vertical-current compound manual wetting ground processing bed with horizontal flow.After sewage was removed most of organism and nitration treatment through vertical fluidized bed earlier, flowing automatically entered horizontal fluidized bed, and a directly introducing part as carbon source, is finished denitrification denitrogenation process at horizontal fluidized bed without the raw waste water of vertical fluidized bed processing simultaneously.
Vertical current and surface current combined artificial wetland handle bed be according to vertical fluidized bed preceding, surperficial fluidized bed after the mode composite system that is together in series and forms.The about 30cm of surface fluidized bed height, the employing normal soil is a treatment media.Sewage is horizontal flow on the surface that with soil is medium, and in medium layer, plant and be implanted with the large-scale emergent that secretes the oxygen ability such as reed, wild rice stem, cattail, power flower, Canna generalis Bailey, calamus, Scirpus tabernaemontani and wild-rice etc. again, utilize the oxygen ability of secreting of waterplant to provide oxygen for the organic substance in the decomposition of the microbial film on the artificial swamp matrix sewage.After sewage was removed most of organic matter and nitration treatment through vertical fluidized bed earlier, the front end that gravity flow enters surperficial fluidized bed mixed with the sewage (as carbon source) that part is handled without vertical fluidized bed, finishes the denitrification denitrogenation process the surface current artificial wetland.
Vertical current and vertical-current compound manual wetting ground are handled bed (composite vertical current bed): be made up of downstream tank and up pond, be provided with partition wall in the middle of two ponds, the bottom is communicated with, and bed height 50-60cm adopts sandstone as treatment media.Sewage flows to up stream from downstream through foot passage, has all planted plant on up stream and the downstream, as reed, cyperus alternifolius, Canna generalis Bailey and Caulis Miscanthis floriduli etc.
The weak point that these four kinds of prior aries exist has:
Though horizontal flow and vertical-current compound manual wetting ground are handled the nitrification and denitrification that bed can be finished a part of nitrogen, but because the relatively poor nitrification effect that causes of horizontal flow oxygen supply condition is not very strong, and nitrogen removal rate is not high yet, only be 30-45%, and need be with the nitration treatment effluent recycling, so both increased power consumption, the increase along with reflux ratio has reduced the sewage disposal water yield again, increase the treatment system floor space, also reduced the clearance of phosphorus simultaneously; Secondly, because the filling substrate that horizontal flow artificial wetland adopts mostly is Wingdale, marble or rhombspar greatly, phosphor-removing effect is not high, is 30-50% only, thereby has influenced the dephosphorization life-span of combined artificial wetland; The 3rd, the oxygen consumption processing power and the nitrated ability of vertical current constructed wetland can not be brought into play fully, and floor space is big.
The main drawback that vertical current and horizontal flow combined artificial wetland are handled bed is that floor space is bigger.
Vertical current and surface current combined artificial wetland are handled bed, must ensure sufficient dissolved oxygen is arranged to finish NH in the water when wherein surface current designs
4 +-N's is nitrated, makes denitrifying bacterium suitable anoxic and aerobic alternate environment and competent organism be arranged as carbon source again simultaneously, with carrying out smoothly of main denitrogenation approach among this surface current artificial wetland of guarantee denitrification denitrogenation; Two kinds of artificial wet land systems of vertical current and surface current are not fine to the removal ability of phosphorus in the sanitary sewage separately, particularly the surface current artificial wetland is relatively poor, and the matrix such as sandy gravel that active vertical person who lives in exile worker wetland extensively adopts are all shorter saturated work-ing life to the absorption of phosphorus, are generally 5-8.
Composite vertical current artificial wetland is handled bed, because current take downstream to flow to the mode of up stream, system is easier to stop up.Entire system anoxic on the other hand, oxygenation capacity is low.Thereby though can adopt intermittent loading to improve this situation, but the dissolved oxygen in the water inlet promptly has been consumed to very low level in downstream tank, good nitrification envrionment conditions can not be provided, can not produce the substrate of a large amount of nitrate as denitrification, make nitrated-denitrification approach not smooth, so the ideal that the clearance of total nitrogen neither be very.
The utility model content
(1) technical problem that will solve
The purpose of this utility model is at the deficiencies in the prior art part, proposes a kind of good sewage processing effect and saves the combined artificial wetland of floor space.
(2) technical scheme
In order to achieve the above object, combined artificial wetland of the present utility model comprises horizontal flow artificial wetland and vertical current constructed wetland, and wherein vertical current constructed wetland is last, horizontal flow artificial wetland under be composed in series combined artificial wetland; Wherein, vertical current constructed wetland comprises a body and water distributor, and the bed body comprises the mixed-matrix layer, and water distributor is distributed in below the mixed-matrix laminar surface; The bottom of vertical current constructed wetland connects the top layer of horizontal flow artificial wetland.
Above-mentioned combined artificial wetland, a kind of preferred scheme is that described water distributor is distributed in following 5-10cm place, vertical current constructed wetland mixed-matrix surface, it comprises with some water distribution branch pipes of the vertical consistency of described bed body with the vertical water distribution of water distribution branch pipe is responsible for, water distribution is responsible for the centre that is distributed in a body, its length is suitable with the bed body length, wherein end sealing, the other end is communicated with sewage water inlet pipe, water distribution branch pipe is fixedly connected on the both sides that water distribution is responsible for, end seal, the downward position of water distribution branch pipe has posticum.
Above-mentioned combined artificial wetland, a kind of preferred scheme are to comprise that also sewage carbon source adds pipe, are " " shape, and an end directly is connected with waste pipe, and be provided with valve water meter on waste pipe, and the other end inserts the mixed-matrix layer along pool wall.
Above-mentioned combined artificial wetland, a kind of preferred scheme is also to comprise the vent-pipe that is opened in vertical current constructed wetland two bottom sides wall, and the convection of air switch that is used to control vent-pipe.
Above-mentioned combined artificial wetland, a kind of preferred scheme are that described horizontal flow artificial wetland is a rectangle, and long-width ratio is 2: 1, alongst are divided into foursquare former and later two son beds, are provided with pigeon-holed wall between two son beds.Vertical current constructed wetland is built on the last height bed exactly.
Above-mentioned combined artificial wetland, a kind of preferred scheme are described mixed-matrix bed thickness 70-100cm, are that 4～19: 1 blast furnace slag and peat composed of rotten mosses mixture are formed by volume ratio.
Above-mentioned combined artificial wetland, a kind of preferred scheme are that described horizontal flow artificial wetland bottom is filled with gravel bed, and thickness is 10-20cm, and the diameter of its cobble-stone is 3-5cm, fills the cinder hypothallus on the gravel bed, and thickness is 50-80cm.
Above-mentioned combined artificial wetland, a kind of preferred scheme are that the plant planted on vertical current constructed wetland is selected from cyperus alternifolius, one or more in power grass, Canna generalis Bailey, Caulis Miscanthis floriduli, rose, Chinese rose, the Flower of Aztec Marigold etc. again; The plant of planting on horizontal flow artificial wetland is selected from Canna generalis Bailey, one or more in power grass, the expensive bamboo of good fortune, swamp cabbage, green water cress, pears wormwood artemisia, kind eat etc. again.
Above-mentioned combined artificial wetland, a kind of preferred scheme are when the HRT when horizontal flow artificial wetland is 1-2d, are between 1: 3～1: 6 as the sewage of carbon source and the suitable proportion of the nitrated water outlet of vertical current constructed wetland.
(3) beneficial effect
Adopt advantage of the present utility model to have:
(1) to COD, BOD in the municipal effluent
5, NH
4 +The clearance of-N and TN reaches 75～85%, 70～80% respectively, 70-90% and more than the 50-60%, COD and BOD in the treat effluent
5Concentration respectively less than 60 and 20mg/L, reach municipal sewage plant's first discharge standard.
(2) clearance to TP in the municipal effluent (total phosphorus) reaches more than the 80-85%, and the TP concentration in the treat effluent reaches municipal sewage plant's first discharge standard less than 1.0mg/L, and reach more than 10 years the work-ing life of phosphorus.
(3) opened two ventilating pits on pool wall both sides, vertical current bottom, helped vertical fluidized bed convection of air up and down like this, thus the nitrification when making sewage through vertical fluidized bed strengthen, for the denitrification of horizontal fluidized bed provides enough substrate-nitrate attitude nitrogen.
(4) in order further to improve the removal effect of total nitrogen, a part of sewage is directly added horizontal flow artificial wetland, utilize that organism (BOD) will be reduced into N from the nitrate attitude nitrogen in the vertical current bed treat effluent as carbon source in the anoxic of horizontal fluidized bed and aerobic alternation condition and the sewage
2O and N
2
(5) vertical fluidized bed is overlayed on the horizontal fluidized bed, saved floor space, also reduce initial cost and processing cost simultaneously.
Description of drawings
Fig. 1 is combined artificial wetland horizontal flow bed structure figure;
Fig. 2 is the vertical current constructed wetland structure iron;
Fig. 3 is horizontal flow artificial wetland vertical current bed structure figure.
Among the figure: 1-settling tank, 2-water pump, 3-elevated tank, 4-waste pipe, 5-valve water meter, the 6-water distribution person in charge, 7-water distribution branch pipe, 8-sewage carbon source add pipe, 9-mixed-matrix layer, 10-pigeon-holed wall, 11-gravel bed, 12-cinder hypothallus, 13-convection of air switch, the horizontal fluidized bed rising pipe of 14-, the horizontal fluidized bed water outlet of 15-water collecting basin
Embodiment
Below in conjunction with description of drawings the utility model.Embodiment only is used to illustrate the utility model, but does not limit scope of the present utility model.
With reference to Fig. 3, in the present embodiment, horizontal fluidized bed is divided into former and later two son beds by length direction, former and later two son beds are communicated by pigeon-holed wall, on last height bed, build vertical fluidized bed, according to vertical fluidized bed last, horizontal fluidized bed down and after being integral of der group combined artificial wetland handle bed, make full use of vertical fluidized bed and finish the major part of oxygen consumption organic is removed and nitrated fully to sanitary sewage, and utilize horizontal fluidized bed further to finish NH
4 +-N, COD and BOD
5Removal, and be used for finishing to NO by the picked-up of denitrification and waterplant
3 -The removal of-N.
Then, in vertical fluidized bed, fill blast furnace slag and peat composed of rotten mosses mixed-matrix, to reach purposes such as higher total tp removal rate and long phosphorus saturated work-ing life.On the other hand, a switch is respectively adorned on pool wall both sides, vertical fluidized bed bottom, closes when pouring water, and opens when not pouring water, and to keep the good convection of air of vertical fluidized bed, making has competent air in the vertical fluidized bed, thereby makes the nitrification of sewage obtain reinforcement.In addition, vertical fluidized bed is last, and horizontal fluidized bed direct and in the bottom is connected, and has saved floor space like this.
Then, the part raw sewerage is directly introduced horizontal flow artificial wetland, under the anoxia condition of horizontal flow artificial wetland, utilize the organism (BOD) in the sanitary sewage to finish the denitrification denitrogenation process as carbon source.
As seen, combined artificial wetland of the present utility model is handled bed, because vertical current constructed wetland and horizontal flow artificial wetland are piled up, vertical current constructed wetland is at the last bottom level person who lives in exile worker wetland that directly connects, therefore after municipal effluent can at first enter settling tank and removes part SS, again through water pump lifting to high-order water tank, then from flowing to the vertical current constructed wetland water distribution uniformity, after vertical fluidized bed body is handled, remove most of SS (suspended substance), COD (chemical oxygen demand (COD)), BOD
5And carry out NITRIFICATION OF WASTEWATER, then flow to the horizontal flow artificial wetland of bottom and the horizontal flow artificial wetland of back, utilize horizontal flow artificial wetland to finish to organic most of the removal, and finish by the absorption of denitrification and waterplant etc. the major part of nitrogen is removed, wherein, denitrification need directly be introduced horizontal flow artificial wetland as carbon source with the part water outlet of settling tank.Vertical current constructed wetland is filled blast furnace slag and peat composed of rotten mosses mixed-matrix, and single or mix ground plantation plant, for example cyperus alternifolius, power grass, Canna generalis Bailey, Caulis Miscanthis floriduli, rose, Chinese rose, Flower of Aztec Marigold etc. again; And fill cinder matrix at horizontal flow artificial wetland, and also single or mix ground plantation plant, for example Canna generalis Bailey, power grass, the expensive bamboo of good fortune, swamp cabbage, green water cress, pears wormwood artemisia, kind eat etc. again.
In the utility model, the removal of phosphorus in can when removing organism and denitrogenation, finishing to waste water, specific practice is to fill blast furnace slag and the peat composed of rotten mosses mixed-matrix that phosphorus is had very strong power surely in vertical current constructed wetland, can remove most phosphorus in the waste water thus; And the cinder matrix of in horizontal flow artificial wetland, filling, can remove most of remaining phosphorus thus; In addition, the picked-up effect of plants such as cyperus alternifolius of planting in the vertical current constructed wetland and Canna generalis Bailey can be removed the part phosphorus in the waste water.
During concrete enforcement, with reference to Fig. 1, Fig. 2 and Fig. 3, combined artificial wetland of the present utility model is made up of settling tank, vertical current constructed wetland and horizontal flow artificial wetland, presses vertical current constructed wetland last, horizontal flow artificial wetland down and after being integral of der group combined artificial wetland.
The mixed-matrix with better phosphor-removing effect is filled in the plantation aspect in the bed body of vertical current constructed wetland, and the plantation cyperus alternifolius.Horizontal flow artificial wetland bed body is filled cinder, and the plantation Canna generalis Bailey.
The connection aspect, modular constructions such as settling tank, vertical current constructed wetland, horizontal flow artificial wetland are formed by pipe connection.
Wherein, vertical fluidized bed is made up of bed body and water distributor, and the bed wall of bed body is made with non-leakage material, and the bed wall is the brick structure of finishing cement, and the bottom is a concrete structure.The bed body is the mixed-matrix layer, and thickness is 85cm, fills blast furnace slag and peat composed of rotten mosses mixed-matrix.Water distributor is distributed in the following 5-10cm of mixed-matrix laminar surface place, and the bottom of vertical fluidized bed is exactly the top layer of horizontal fluidized bed, and the matrix of filling is cinder matrix, and plants the plant that helps nitrification of dark root, for example cyperus alternifolius in vertical fluidized bed body.
The water distributor aspect, be distributed in below the vertical current constructed wetland mixed-matrix surface, comprise with some water distribution branch pipes of the vertical consistency of bed body with the vertical water distribution of water distribution branch pipe and being responsible for, for example the water distributor of the vertical fluidized bed in the present embodiment is " king " font, is distributed in following 5-10cm place, mixed-matrix surface.This water distributor is made up of the water distribution person in charge 6 and many water distribution branch pipes 7.The water distribution person in charge 6 is distributed in the centre of a body, and its length is suitable with the bed body length, wherein end sealing, and the other end is connected with sewage water inlet pipe 4; Water distribution branch pipe 7 is fixedly connected on water distribution and is responsible for 6 both sides, end seal, and its length is half of bed body width, water distribution branch pipe 7 downward positions have posticum and are used for water distribution.Sewage water inlet pipe 4 is provided with valve water meter 5, with the water intake velocity of control sewage.
It is " " shape pipe that sewage carbon source adds pipe 8, and an end directly is connected with waste pipe 4, and be provided with valve water meter 5 on waste pipe 4, and the other end inserts below vertical fluidized bed mixed-matrix layer 9 bottom along pool wall.
Vertical fluidized bed two bottom sides pool wall respectively has a vent-pipe, and is provided with convection of air switch 13.When vertical fluidized bed is poured water, close convection of air switch 13; Open convection of air switch 13 when not pouring water, be beneficial to vertical fluidized bed ventilating convection.
Make with non-leakage material the body of wall of horizontal fluidized bed and bottom, and the bed wall is the brick structure of finishing cement, and the bottom is a concrete structure.Horizontal fluidized bed is a rectangle, and long-width ratio is 2: 1 in the present embodiment, alongst is divided into foursquare front and back two lattice, is provided with pigeon-holed wall 10 between two lattice, and sewage flows into the back lattice by pigeon-holed wall 10 by preceding lattice.Gravel bed 11 thick about 15cm of horizontal fluidized bed bottom, the diameter of filling gravel is 3-5cm, fills the thick cinder hypothallus 12 of 70cm then thereon.
With reference to Fig. 3, when using the utility model, sand grains and suspended particulate matter that municipal effluent at first removes in the decontaminated water through settling tank 1 promote with water pump 2 then and enter elevated tank 3, enter water distribution along waste pipe 4 again and be responsible for 6, water distribution is provided with valve water meter 5 before being responsible for 6.Water distribution branch pipe 7 directly is placed on the surface of vertical fluidized bed mixed-matrix, and the posticum that sewage is evenly offered from the water distribution branch pipe 7 is batched on vertical fluidized bed mixed-matrix layer 9.Sewage passes through 9 diafiltration vertically downward of mixed-matrix layer, is held back with the picked-up effect of adsorption and root system of plant by the filtration of matrix and removes most of oxygen consumption organic and TP, and finish the complete nitration treatment to them.
The treat effluent of vertical current constructed wetland utilizes the drop gravity flow between vertical current constructed wetland and the horizontal flow artificial wetland to enter horizontal flow artificial wetland.Sewage is through behind the horizontal flow artificial wetland, utilizes the filtration of horizontal flow artificial wetland cinder matrix to hold back with adsorption and removes remaining COD, BOD in the sewage
5And TP.Simultaneously, introduce a part of sewage from the high-water case and directly be added to horizontal flow artificial wetland as carbon source by sewage carbon source adding pipe 8, mix at the cinder hypothallus 12 of horizontal fluidized bed with the nitrated water outlet of vertical fluidized bed, pigeon-holed wall 10 by horizontal fluidized bed flows into the horizontal fluidized bed of another lattice then, hold back and the plant absorbing effect by the filtration of cinder hypothallus 12 once more, respectively through being discharged into horizontal fluidized bed water outlet water collecting basin 15 through horizontal fluidized bed rising pipe 14 again after 2/3 day-2 day residence time and the denitrification denitrogenation process.
During concrete the test, a day processing water yield is 0.8-2.4m
3/ d; Grid adopts 2cm * 2cm wire netting, stands in the inspection chamber that septic tank effluent mouth and underground aqueduct join; Settling tank is of a size of 2.0m * 1.8m * 2.0m, available depth 1.0m, useful volume 3.6m
3, the brick structure finishing cement.
Vertical current constructed wetland size length * wide * height is 2m * 1.0m * 0.85m, divides two lattice, the brick structure finishing cement; Single pond practical dimensions length * wide 1.0m * 1.0m * 0.85m, wherein, mixed-matrix bed thickness 85cm is made up of blast furnace slag and peat composed of rotten mosses mixing.
Size length * wide * the height of horizontal flow artificial wetland is 2m * 2m * 0.80m, is divided into handling and contrast two parts, and each part is divided into former and later two son beds again.Horizontal fluidized bed bottom is filled the thick gravel of 15cm earlier as bed course, and then fills the thick cinder matrix of 65cm.The sewage of handling through vertical fluidized bed enters previous horizontal flow bed down from last gravity flow, and then connects sub of a back horizontal flow by pigeon-holed wall.
The HRT (hydraulic detention time) that operation scheme adopts is 16h, 1d, 2d.Total system is divided two portions, and a part compares, and plants cyperus alternifolius on the vertical fluidized bed of another part, plants Canna generalis Bailey on the corresponding horizontal fluidized bed.
Treatment effect (mg/L, %) shown in table 1, table 2, table 3 and table 4, wherein:
Table 1 is a municipal effluent after this combined artificial wetland is handled, the COD change in concentration situation in the sewage;
Table 2 is a municipal effluent after this combined artificial wetland is handled, the BOD in the sewage
5The change in concentration situation;
Table 3 is a municipal effluent after this combined artificial wetland is handled, the NH in the sewage
4 +-N change in concentration situation;
Table 4 is a municipal effluent after this combined artificial wetland is handled, the TP change in concentration situation in the sewage;
Table 5 is a municipal effluent after this combined artificial wetland is handled, TN change in concentration situation in the sewage;
Table 6 is under the ratio condition of different sewage and nitration treatment water outlet, municipal effluent after this combined artificial wetland is handled, TN in the sewage (total nitrogen) change in concentration situation.
Table 1COD change in concentration situation
| Date | Hydraulic detention time | Sewage | Horizontal fluidized bed length (not plantation) | Horizontal fluidized bed length (plantation Canna generalis Bailey) | |||||||
| 0.5m | 1.0m | 1.5m | 2.0m | 0.5m | 1.0m | 1.5m | 2.0m | ||||
| 05/31/05 | 2/3 day | Concentration (mg/L) | 183.21 | 24.23 | 20.36 | 16.28 | 28.50 | 4.07 | 16.28 | 12.21 | 20.36 |
| Clearance (%) | 86.77 | 88.89 | 91.11 | 84.44 | 97.78 | 91.11 | 93.34 | 88.89 | |||
| 06/23/05 | 2/3 day | Concentration (mg/L) | 172.08 | 52.83 | 46.42 | 25.16 | 39.25 | 33.71 | 42.77 | 27.67 | 50.31 |
| Clearance (%) | 69.30 | 73.02 | 85.38 | 77.19 | 80.41 | 75.15 | 83.92 | 70.76 | |||
| 09/08/05 | 2/3 day | Concentration (mg/L) | 91.52 | 32.45 | 18.72 | 23.71 | 22.88 | 24.96 | 33.28 | 18.72 | 19.55 |
| Clearance (%) | 64.54 | 79.55 | 74.09 | 75.00 | 72.73 | 63.64 | 79.55 | 78.64 | |||
| 05/26/05 | 1 day | Concentration (mg/L) | 112.92 | 34.53 | 28.43 | 56.87 | 38.59 | 32.50 | 26.40 | 48.74 | 71.08 |
| Clearance (%) | 69.42 | 74.82 | 49.64 | 65.83 | 71.22 | 76.62 | 56.84 | 37.05 | |||
| 06/13/05 | 1 day | Concentration (mg/L) | 165.52 | 60.43 | 42.04 | 58.24 | 62.62 | 31.35 | 32.84 | 26.71 | 45.10 |
| Clearance (%) | 63.49 | 74.60 | 64.81 | 62.17 | 81.06 | 80.16 | 83.86 | 72.75 | |||
| 08/28/05 | 1 day | Concentration (mg/L) | 99.47 | 27.51 | 38.10 | 8.47 | 33.86 | 29.63 | 42.33 | 33.86 | 33.86 |
| Clearance (%) | 72.34 | 61.70 | 91.48 | 65.96 | 70.21 | 57.44 | 65.96 | 65.96 | |||
| 06/07/05 | 2 days | Concentration (mg/L) | 121.41 | 56.37 | 30.35 | 41.19 | 30.35 | 17.34 | 39.02 | 43.36 | 32.52 |
| Clearance (%) | 53.57 | 75.00 | 66.07 | 75.00 | 85.72 | 67.86 | 64.29 | 73.21 | |||
| 06/19/05 | 2 days | Concentration (mg/L) | 126.25 | 35.44 | 29.68 | 22.15 | 26.58 | 17.72 | 34.55 | 23.48 | 26.58 |
| Clearance (%) | 71.93 | 76.49 | 82.46 | 78.95 | 85.96 | 72.63 | 81.40 | 78.95 | |||
| 09/03/05 | 2 days | Concentration (mg/L) | 92.70 | 16.51 | 25.40 | 8.53 | 11.09 | 5.93 | 18.62 | 23.47 | 16.21 |
| Clearance (%) | 82.19 | 72.60 | 90.80 | 88.04 | 93.60 | 79.91 | 74.68 | 82.51 | |||
Table 1BOD
5The change in concentration situation
| Date | Hydraulic detention time | Sewage | Horizontal fluidized bed length (not plantation) | Horizontal fluidized bed length (plantation Canna generalis Bailey) | |||||||
| 0.5m | 1.0m | 1.5m | 2.0m | 0.5m | 1.0m | 1.5m | 2.0m | ||||
| 05/31/05 | 2/3 day | Concentration (mg/L) | 56.90 | 13.2 | 3.89 | 4.19 | 8.07 | 4.96 | 21.9 | 2.88 | 0.89 |
| Clearance (%) | 76.80 | 93.16 | 92.64 | 85.82 | 91.28 | 61.51 | 94.94 | 98.44 | |||
| 09/08/05 | 2/3 day | Concentration (mg/L) | 26.67 | 12.34 | 16 | 10.89 | 8.11 | 5.64 | 3.69 | 12.34 | 5.92 |
| Clearance (%) | 53.73 | 40.01 | 59.17 | 69.59 | 78.85 | 86.16 | 53.73 | 77.80 | |||
| 06/23/05 | 2/3 day | Concentration (mg/L) | 46.76 | 17.82 | 17.1 | 13.78 | 10.11 | 15.55 | 4.86 | 18.89 | 10.01 |
| Clearance (%) | 61.89 | 63.43 | 70.53 | 78.38 | 66.75 | 89.61 | 59.60 | 78.59 | |||
| 05/26/05 | 1 day | Concentration (mg/L) | 45.05 | 14.82 | 5.42 | 27.11 | 26.91 | 2.17 | 3.89 | 7.15 | 10.02 |
| Clearance (%) | 67.10 | 87.97 | 39.82 | 40.27 | 95.18 | 91.37 | 84.13 | 77.76 | |||
| 06/13/05 | 1 day | Concentration (mg/L) | 55.65 | 5.85 | 6.55 | 2.67 | 11.79 | 8.95 | 7.95 | 5.93 | 7.95 |
| Clearance (%) | 89.49 | 88.23 | 95.20 | 78.81 | 83.92 | 85.71 | 89.34 | 85.71 | |||
| 08/28/05 | 1 day | Concentration (mg/L) | 55.65 | 5.85 | 6.55 | 2.67 | 11.79 | 8.95 | 7.95 | 5.93 | 7.95 |
| Clearance (%) | 89.49 | 88.23 | 95.20 | 78.81 | 83.92 | 85.71 | 89.34 | 85.71 | |||
| 05/14/05 | 2 days | Concentration (mg/L) | 35.7 | 9.10 | 3.20 | 5.02 | 2.54 | 6.50 | 6.30 | 2.18 | 4.45 |
| Clearance (%) | 74.51 | 91.04 | 85.94 | 92.89 | 81.79 | 82.35 | 93.89 | 87.54 | |||
| 06/07/05 | 2 days | Concentration (mg/L) | 62.73 | 13.44 | 20.25 | 12.01 | 13.26 | 15.41 | 26.98 | 17.11 | 13.87 |
| Clearance (%) | 78.57 | 67.72 | 80.85 | 78.86 | 75.43 | 56.99 | 72.72 | 77.89 | |||
| 09/03/05 | 2 days | Concentration (mg/L) | 56.70 | 19.53 | 15.12 | 3.78 | 8.82 | 8.82 | 19.53 | 8.19 | 14.81 |
| Clearance (%) | 65.56 | 73.33 | 93.33 | 84.44 | 84.44 | 65.56 | 85.56 | 73.88 | |||
Table 3NH
4 +-N change in concentration situation
| Date | Hydraulic detention time | Sewage | Horizontal fluidized bed length (not plantation) | Horizontal fluidized bed length (plantation Canna generalis Bailey) | |||||||
| 0.5m | 1.0m | 1.5m | 2.0m | 0.5m | 1.0m | 1.5m | 2.0m | ||||
| 05/31/05 | 2/3 day | Concentration (mg/L) | 93.71 | 63.00 | 44.10 | 40.32 | 42.84 | 27.72 | 43.47 | 43.47 | 47.25 |
| Clearance (%) | 32.77 | 52.94 | 56.97 | 54.28 | 70.42 | 53.61 | 53.61 | 49.58 | |||
| 06/23/05 | 2/3 day | Concentration (mg/L) | 107.10 | 58.59 | 40.32 | 24.89 | 34.18 | 12.92 | 29.61 | 31.25 | 34.65 |
| Clearance (%) | 45.29 | 62.35 | 76.76 | 68.09 | 87.94 | 72.35 | 70.82 | 67.65 | |||
| 09/08/05 | 2/3 day | Concentration (mg/L) | 59.85 | 17.64 | 34.02 | 3.78 | 7.56 | 10.08 | 23.31 | 8.19 | 11.97 |
| Clearance (%) | 70.53 | 43.16 | 93.68 | 87.37 | 83.16 | 61.05 | 86.32 | 80.00 | |||
| 05/26/05 | 1 day | Concentration (mg/L) | 84.26 | 40.32 | 30.87 | 51.03 | 50.40 | 35.91 | 24.57 | 51.66 | 54.87 |
| Clearance (%) | 52.15 | 63.36 | 39.44 | 40.19 | 57.38 | 70.84 | 38.69 | 34.88 | |||
| 06/13/05 | 1 day | Concentration (mg/L) | 105.00 | 110.25 | 61.34 | 37.80 | 26.78 | 23.63 | 58.28 | 33.08 | 48.83 |
| Clearance (%) | -5.00 | 41.58 | 64.00 | 74.50 | 77.50 | 44.50 | 68.50 | 53.50 | |||
| 08/28/05 | 1 day | Concentration (mg/L) | 58.80 | 44.10 | 30.24 | 3.15 | 9.45 | 15.75 | 31.50 | 7.56 | 11.91 |
| Clearance (%) | 25.00 | 48.57 | 94.64 | 83.93 | 73.21 | 46.43 | 87.14 | 79.74 | |||
| 06/07/04 | 2 days | Concentration (mg/L) | 114.66 | 48.20 | 51.35 | 30.87 | 54.81 | 23.63 | 27.09 | 28.35 | 44.10 |
| Clearance (%) | 57.96 | 55.22 | 73.08 | 52.20 | 79.39 | 76.37 | 75.27 | 61.54 | |||
| 06/19/04 | 2 days | Concentration (mg/L) | 71.93 | 28.98 | 15.12 | 29.61 | 49.77 | 1.89 | 30.24 | 28.35 | 22.05 |
| Clearance (%) | 59.71 | 78.98 | 58.83 | 30.81 | 97.37 | 57.96 | 60.59 | 69.35 | |||
| 09/03/05 | 2 days | Concentration (mg/L) | 56.70 | 19.53 | 15.12 | 3.78 | 8.82 | 8.82 | 19.53 | 8.19 | 14.81 |
| Clearance (%) | 65.56 | 73.33 | 93.33 | 84.44 | 84.44 | 65.56 | 85.56 | 73.88 | |||
Table 4TP change in concentration situation
| Date | Hydraulic detention time | Sewage | Horizontal fluidized bed length (not plantation) | Horizontal fluidized bed length (plantation Canna generalis Bailey) | |||||||
| 0.5m | 1.0m | 1.5m | 2.0m | 0.5m | 1.0m | 1.5m | 2.0m | ||||
| 05/31/05 | 2/3 day | Concentration (mg/L) | 7.58 | 3.06 | 2.23 | 0.61 | 0.51 | 0.83 | 2.99 | 0.66 | 0.81 |
| Clearance (%) | 59.63 | 70.58 | 91.95 | 93.27 | 89.05 | 60.55 | 91.29 | 89.31 | |||
| 06/23/05 | 2/3 day | Concentration (mg/L) | 7.53 | 4.00 | 2.88 | 0.88 | 1.21 | 0.89 | 1.80 | 1.01 | 1.51 |
| Clearance (%) | 46.88 | 61.75 | 88.31 | 83.93 | 88.18 | 76.10 | 86.59 | 79.95 | |||
| 09/08/05 | 2/3 day | Concentration (mg/L) | 7.88 | 2.98 | 3.30 | 1.36 | 1.62 | 1.89 | 3.39 | 1.39 | 1.59 |
| Clearance (%) | 62.18 | 58.12 | 82.74 | 79.44 | 76.02 | 56.98 | 82.36 | 79.82 | |||
| 05/26/05 | 1 day | Concentration (mg/L) | 5.65 | 1.61 | 1.43 | 1.42 | 1.77 | 1.34 | 0.88 | 1.01 | 1.26 |
| Clearance (%) | 71.50 | 74.69 | 74.87 | 68.67 | 76.28 | 84.42 | 82.12 | 77.70 | |||
| 06/13/05 | 1 day | Concentration (mg/L) | 6.84 | 5.36 | 1.58 | 0.49 | 0.93 | 0.87 | 1.66 | 0.59 | 1.13 |
| Clearance (%) | 21.64 | 76.90 | 92.84 | 86.40 | 87.28 | 75.73 | 91.37 | 83.48 | |||
| 08/28/05 | 1 day | Concentration (mg/L) | 4.41 | 3.41 | 1.89 | 0.71 | 0.65 | 0.96 | 1.91 | 0.54 | 0.70 |
| Clearance (%) | 22.68 | 57.14 | 83.90 | 85.26 | 78.23 | 56.69 | 87.76 | 84.13 | |||
| 06/07/04 | 2 days | Concentration (mg/L) | 6.79 | 2.99 | 1.66 | 0.57 | 0.58 | 0.87 | 1.23 | 0.64 | 0.76 |
| Clearance (%) | 55.96 | 75.55 | 91.61 | 91.46 | 87.19 | 81.89 | 90.57 | 88.81 | |||
| 06/19/04 | 2 days | Concentration (mg/L) | 7.18 | 2.20 | 1.55 | 0.72 | 0.77 | 0.66 | 0.93 | 0.78 | 1.97 |
| Clearance (%) | 69.36 | 78.41 | 89.97 | 89.28 | 90.81 | 87.05 | 89.14 | 72.56 | |||
| 09/03/05 | 2 days | Concentration (mg/L) | 3.40 | 0.77 | 0.88 | 0.38 | 0.33 | 0.59 | 0.83 | 0.54 | 0.41 |
| Clearance (%) | 77.35 | 74.12 | 88.82 | 90.29 | 82.65 | 75.59 | 84.12 | 87.94 | |||
Table 5TN change in concentration situation
| Date | Hydraulic detention time | Sewage | Horizontal fluidized bed length (not plantation) | Horizontal fluidized bed length (plantation Canna generalis Bailey) | |||||||
| 0.5m | 1.0m | 1.5m | 2.0m | 0.5m | 1.0m | 1.5m | 2.0m | ||||
| 05/31/05 | 2/3 day | Concentration (mg/L) | 94.80 | 75.72 | 56.84 | 49.45 | 51.25 | 36.26 | 68.13 | 52.55 | 59.04 |
| Clearance (%) | 20.13 | 40.04 | 47.84 | 45.94 | 61.75 | 28.13 | 44.57 | 37.72 | |||
| 06/23/05 | 2/3 day | Concentration (mg/L) | 121.18 | 79.84 | 58.46 | 45.69 | 53.70 | 28.38 | 54.28 | 43.60 | 58.93 |
| Clearance (%) | 34.11 | 51.76 | 62.30 | 55.69 | 76.58 | 55.21 | 64.02 | 51.37 | |||
| 09/08/05 | 2/3 day | Concentration (mg/L) | 53.67 | 21.67 | 27.19 | 2.77 | 9.50 | 8.95 | 29.69 | 6.36 | 8.40 |
| Clearance (%) | 59.63 | 49.34 | 94.84 | 82.30 | 83.32 | 44.68 | 88.15 | 84.35 | |||
| 05/26/05 | 1 day | Concentration (mg/L) | 91.15 | 73.52 | 54.91 | 59.10 | 55.79 | 68.02 | 47.97 | 57.22 | 59.09 |
| Clearance (%) | 19.17 | 39.41 | 34.86 | 38.46 | 25.15 | 46.96 | 36.90 | 34.87 | |||
| 06/13/05 | 1 day | Concentration (mg/L) | 108.56 | 126.99 | 61.85 | 41.43 | 93.19 | 20.89 | 60.09 | 39.55 | 89.67 |
| Clearance (%) | - | 43.03 | 61.84 | 14.16 | 80.76 | 44.65 | 63.57 | 17.40 | |||
| 08/28/05 | 1 day | Concentration (mg/L) | 60.03 | 47.42 | 36.31 | 7.84 | 14.15 | 47.42 | 36.31 | 7.07 | 18.85 |
| Clearance (%) | 21.01 | 39.51 | 86.94 | 76.43 | 21.01 | 39.51 | 88.22 | 68.60 | |||
| 06/07/05 | 2 days | Concentration (mg/L) | 104.29 | 77.52 | 51.74 | 43.15 | 47.85 | 17.88 | 41.45 | 39.36 | 46.75 |
| Clearance (%) | 25.67 | 50.39 | 58.62 | 54.12 | 82.86 | 60.26 | 62.26 | 55.17 | |||
| 06/19/05 | 2 days | Concentration (mg/L) | 84.97 | 64.16 | 33.15 | 38.35 | 61.87 | 12.23 | 52.81 | 32.11 | 40.65 |
| Clearance (%) | 24.49 | 60.99 | 54.87 | 27.19 | 85.61 | 37.85 | 62.21 | 52.16 | |||
| 09/03/05 | 2 days | Concentration (mg/L) | 58.62 | 20.30 | 17.55 | 2.05 | 5.82 | 10.50 | 21.21 | 5.61 | 11.68 |
| Clearance (%) | 65.37 | 70.06 | 96.50 | 90.07 | 82.09 | 63.82 | 90.43 | 80.08 | |||
Table 6
| Sewage: nitrify water | The moon/day/year | The hydraulic detention time of horizontal flow artificial wetland | Sewage TN concentration | Horizontal flow water outlet (contrast) | Horizontal flow water outlet (processing) | |
| 1∶3 | 06/24/05 | 1 day | Concentration (mg/L) | 116.00 | 67.45 | 48.1 |
| Clearance (%) | 41.85 | 58.53 | ||||
| 1∶4 | 06/24/05 | 1 day | Concentration (mg/L) | 116.33 | 55.03 | 54.47 |
| Clearance (%) | 52.69 | 53.17 | ||||
| 1∶5 | 06/28/05 | 1 day | Concentration (mg/L) | 89.18 | 53.27 | 49.81 |
| Clearance (%) | 40.27 | 44.15 | ||||
| 1∶6 | 06/29/05 | 1 day | Concentration (mg/L) | 115.91 | 54.27 | 35.45 |
| Clearance (%) | 53.18 | 69.42 | ||||
| 1∶3 | 07/03/05 | 2 days | Concentration (mg/L) | 144.15 | 74.44 | 71.79 |
| Clearance (%) | 48.36 | 50.11 | ||||
| 1∶4 | 07/08/05 | 2 days | Concentration (mg/L) | 101.26 | 59.6 | 54.85 |
| Clearance (%) | 41.14 | 45.83 | ||||
| 1∶5 | 07/10/05 | 2 days | Concentration (mg/L) | 120.89 | 68.3 | 57.64 |
| Clearance (%) | 43.50 | 52.30 | ||||
| 1∶6 | 07/12/05 | 2 days | Concentration (mg/L) | 93.4 | 60.45 | 59.12 |
| Clearance (%) | 35.27 | 36.70 | ||||
Table 6
As can be seen, adopt benefit of the present utility model to be:
(1) owing to utilizes vertical current constructed wetland to remove part TN, TP, COD, BOD
5, SS and waste water nitrated fully, utilize horizontal flow artificial wetland to finish COD, BOD again
5, SS and TP the part denitrification of removing function and waste water.Sewage is laggardly gone under the anaerobic environment condition of horizontal flow artificial swamp at horizontal flow artificial wetland through vertical current constructed wetland is nitrated, utilize the tired organic and vegeto-animal residual body of organism in the sewage (BOD) and bed volume to finish the denitrification denitrogenation effect, also increased horizontal flow artificial wetland to BOD simultaneously as carbon source
5Removal ability with COD.Vertical current and horizontal flow integrated composite artificial wetland do not need to reflux, thereby have reduced processing cost.This combined artificial wetland is to COD, BOD in the municipal effluent
5, NH
4 +The clearance of-N and TN reaches 75～85%, 70～80% respectively, 70-90% and more than the 50-60%, COD and BOD in the treat effluent
5Concentration respectively less than 60 and 20mg/L, reach municipal sewage plant's first discharge standard basically.
(2) utilize the blast furnace slag of vertical current constructed wetland filling and the removal function that peat composed of rotten mosses mixed-matrix is finished most phosphorus in the sewage; Utilize in the horizontal flow artificial wetland cinder and gravel matrix that the phosphorus fixation effect is finished the part of phosphor in sewage is removed function, utilize the plant picked-up effect of the cyperus alternifolius of planting in vertical current and the horizontal flow artificial wetland and Canna generalis Bailey to remove part phosphorus simultaneously, thereby combined artificial wetland is reached more than the 80-85% to the clearance of TP in the municipal effluent, TP concentration in the treat effluent is less than 1mg/L, substantially reached municipal sewage plant's first discharge standard, and the invention technology is to reaching more than 10 years in work-ing life of phosphorus.
(3) opened two ventilating pits on pool wall both sides, vertical current bottom, helped vertical fluidized bed convection of air up and down like this, thus the nitrification when making sewage through vertical fluidized bed strengthen, for the denitrification of horizontal fluidized bed provides enough substrate-nitrate attitude nitrogen.
(4) in order further to improve the removal effect of total nitrogen, a part of sewage is directly added horizontal flow artificial wetland, utilize that organism (BOD) will be reduced into N from the nitrate attitude nitrogen in the vertical current bed treat effluent as carbon source in the anoxic of horizontal fluidized bed and aerobic alternation condition and the sewage
2O and N
2
(5) vertical fluidized bed is overlayed on the horizontal fluidized bed, saved floor space, also reduce initial cost and processing cost simultaneously.
Claims (9)
1, a kind of combined artificial wetland comprises horizontal flow artificial wetland and vertical current constructed wetland, it is characterized in that vertical current constructed wetland last, horizontal flow artificial wetland under be composed in series combined artificial wetland; Wherein, vertical current constructed wetland comprises a body and water distributor, and the bed body comprises mixed-matrix layer (9), and water distributor is distributed in below the mixed-matrix laminar surface; The bottom of vertical current constructed wetland connects the top layer of horizontal flow artificial wetland.
2, combined artificial wetland as claimed in claim 1, it is characterized in that described water distributor is distributed in following 5-10cm place, vertical current constructed wetland mixed-matrix surface, it comprises with some the water distribution branch pipes (7) of the vertical consistency of described bed body with the vertical water distribution of water distribution branch pipe (7) is responsible for (6), water distribution is responsible for the centre that (6) are distributed in a body, its length is suitable with the bed body length, wherein end sealing, the other end is communicated with sewage water inlet pipe (4), water distribution branch pipe (7) is fixedly connected on the both sides that water distribution is responsible for, end seal, the downward position of water distribution branch pipe has posticum.
3, combined artificial wetland as claimed in claim 1, it is characterized in that also comprising that sewage carbon source adds pipe (8), be ∏ shape, an end directly is connected with waste pipe (4), and on waste pipe (4), being provided with valve water meter (5), the other end inserts mixed-matrix layer (9) along pool wall.
4, combined artificial wetland as claimed in claim 1 is characterized in that also comprising the vent-pipe that is opened in vertical current constructed wetland two bottom sides wall, and the convection of air switch (13) that is used to control vent-pipe.
5, combined artificial wetland as claimed in claim 1 is characterized in that described horizontal flow artificial wetland is a rectangle, and long-width ratio is 2: 1, alongst is divided into foursquare former and later two son beds, is provided with pigeon-holed wall (10) between two son beds.
6, combined artificial wetland as claimed in claim 1 is characterized in that the thick 70-100cm of described mixed-matrix layer (9).
7, combined artificial wetland as claimed in claim 1, it is characterized in that described horizontal flow artificial wetland bottom is filled with gravel bed (11), thickness is 10-20cm, and the diameter of its cobble-stone is 3-5cm, fill cinder hypothallus (12) on the gravel bed, thickness is 50-80cm.
8, combined artificial wetland as claimed in claim 1 is characterized in that the plant of planting is selected from cyperus alternifolius, one or more in power grass, Canna generalis Bailey, Caulis Miscanthis floriduli, rose, Chinese rose, the Flower of Aztec Marigold etc. again on vertical current constructed wetland; The plant of planting on horizontal flow artificial wetland is selected from Canna generalis Bailey, one or more in power grass, the expensive bamboo of good fortune, swamp cabbage, green water cress, pears wormwood artemisia, kind eat etc. again.
9, combined artificial wetland as claimed in claim 1 is characterized in that when the HRT when horizontal flow artificial wetland is 1-2d, is between 1: 3～1: 6 as the sewage of carbon source and the suitable proportion of the nitrated water outlet of vertical current constructed wetland.
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| CNU2006200227904U CN2905775Y (en) | 2006-02-27 | 2006-02-27 | Composite artificial wetland |
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| CNU2006200227904U CN2905775Y (en) | 2006-02-27 | 2006-02-27 | Composite artificial wetland |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186382B (en) * | 2007-11-28 | 2010-06-02 | 浙江师范大学 | Stereo artificial wetland system for treating sewage |
| CN102603118A (en) * | 2012-03-12 | 2012-07-25 | 浙江省环境保护科学设计研究院 | Sewage treatment method based on blasting laminated artificial wetland |
| CN102627376A (en) * | 2012-04-18 | 2012-08-08 | 四川大学 | Distributed sewage integrated artificial wetland treatment facility and method |
| CN106007181A (en) * | 2016-06-23 | 2016-10-12 | 张锦宇 | Tidal mixed flow constructed wetland system and sewage treatment method |
-
2006
- 2006-02-27 CN CNU2006200227904U patent/CN2905775Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186382B (en) * | 2007-11-28 | 2010-06-02 | 浙江师范大学 | Stereo artificial wetland system for treating sewage |
| CN102603118A (en) * | 2012-03-12 | 2012-07-25 | 浙江省环境保护科学设计研究院 | Sewage treatment method based on blasting laminated artificial wetland |
| CN102627376A (en) * | 2012-04-18 | 2012-08-08 | 四川大学 | Distributed sewage integrated artificial wetland treatment facility and method |
| CN106007181A (en) * | 2016-06-23 | 2016-10-12 | 张锦宇 | Tidal mixed flow constructed wetland system and sewage treatment method |
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