CN211111303U - Composite construction system for large-scale and special-shaped artificial wetland - Google Patents
Composite construction system for large-scale and special-shaped artificial wetland Download PDFInfo
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- CN211111303U CN211111303U CN201921838388.7U CN201921838388U CN211111303U CN 211111303 U CN211111303 U CN 211111303U CN 201921838388 U CN201921838388 U CN 201921838388U CN 211111303 U CN211111303 U CN 211111303U
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Abstract
The utility model discloses a composite construction system of large-scale and abnormal-shape artificial wetlands, which is characterized in that the large-scale or abnormal-shape artificial wetlands are decomposed into one group or a plurality of groups; each group of artificial wetland is divided into 2 levels or more of regular artificial wetland treatment units, and the adjacent 2 regular artificial wetland treatment units are connected by a transition section, wherein: the regular artificial wetland treatment unit comprises a regular surface flow wetland treatment unit and/or a regular subsurface flow wetland treatment unit, and the transition section comprises a horizontal subsurface flow wetland type transition section or a surface flow wetland type transition section. The utility model discloses a regular constructed wetland treatment unit combines together with the changeover portion rectification, has realized the effective utilization of irregular landmass, does benefit to large-scale and super large-scale constructed wetland's constitution, promotes constructed wetland's treatment effeciency, prolongs constructed wetland's life.
Description
Technical Field
The utility model belongs to the technical field of resource and environment, more specifically relates to a large-scale, heterotypic constructed wetland's complex founds system, is applicable to large-scale or heterotypic constructed wetland effective treatment rainwater, sewage and drinking water source water treatment.
Background
The artificial wetland system is a complete ecological system, can form good internal circulation, organically combines the treatment of rainwater and sewage or the treatment of micro-polluted drinking water with the ecological construction of the environment, and can create new ecological landscape and beautify the environment while treating the rainwater and sewage or the water of the organic micro-polluted water source. The artificial wetland has become an important means in the current resource and environment fields, and the good effect and adaptability of the artificial wetland also make the artificial wetland have important utilization and popularization values.
However, the artificial wetland is affected by natural conditions such as climate and temperature, and also by problems such as uneven distribution and easy sedimentation. The land allocated to the artificial wetland in the engineering is often irregular in shape, and the artificial wetland constructed on the basis is often low in treatment efficiency due to uneven water distribution.
Even if the artificial wetland is in a regular shape, the water distribution is not uniform and is rapidly expanded due to local blockage, so that the treatment capacity rapidly slides down, for example, the artificial wetland is treated by 10 ten thousand meters in less than 3 years by a certain drinking water source3The processing capacity of the reactor rapidly drops to 5 ten thousand meters3/d。
With the popularization and application of the artificial wetland, the construction of the special-shaped wetland and the large-scale wetland is increased, and a construction technology of the artificial wetland is urgently needed, so that the problem of uneven water distribution is solved, the treatment efficiency is improved, and the service life of the artificial wetland is effectively prolonged.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a large-scale, heterotypic constructed wetland's complex system of founding, convenient operation has adopted the wetland combination of different forms to realize even water distribution, has the flow state good, easily maintains, characteristics that the treatment effect is stable to can make up ecological function and processing function organically.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a large-scale, heterotypic constructed wetland's complex system of establishing, this technique includes the combination of techniques such as large-scale or heterotypic constructed wetland's decomposition, regular constructed wetland unit construction, changeover portion construction. Specifically, the utility model discloses a large-scale, heterotypic constructed wetland's complex system of establishing, large-scale or heterotypic constructed wetland decomposes into a set of or multiunit, and every constructed wetland of group divides into 2 or above regular constructed wetland processing unit, links up with the changeover portion between the adjacent 2 regular constructed wetland processing unit, wherein:
the regular artificial wetland treatment unit comprises a regular surface flow wetland treatment unit and/or a regular subsurface flow wetland treatment unit, and the regular subsurface flow wetland treatment unit comprises a regular horizontal subsurface flow wetland treatment unit and/or a regular vertical subsurface flow wetland treatment unit;
the transition section comprises a horizontal undercurrent wetland type transition section or a surface current wetland type transition section.
Preferably, the area of the regular surface flow wetland treatment unit is not more than 3000m2The length-width ratio is 2: 1-10: 1, the water depth is 0.2-0.8 m, and the hydraulic gradient is not more than 0.5%; the area of the regular horizontal subsurface flow wetland treatment unit is not more than 800m2The length-width ratio is not more than 10:1, the length is not more than 20-50 m, the hydraulic gradient is 0.5-1.0%, the water depth is 0.4-1.6 m, and the water surface is 0.05-0.20 m lower than the surface of the substrate; the area of the regular vertical subsurface flow wetland treatment unit is not more than 1500m2The length-width ratio is 2:1, the length is not more than 20 m-50 m, the hydraulic gradient is not more than 1.0%, and the water depth is 1.5 m.
Furthermore, the ratio of the average length of the transition section along the water flow direction to the average width of the transition section perpendicular to the water flow direction is 0.15: 1-3: 1.
Preferably, the depth of the horizontal subsurface flow wetland type transition section is the deeper one of the front and back regular artificial wetland treatment units, and the filler grading is configured as follows: 1.8-4 times of the regular artificial wetland treatment units with larger effective particle size is adopted for connecting the two regular horizontal subsurface flow wetland treatment units; when the surface flow wetland type transition section is used for connection between the regular surface flow wetland treatment units, the water depth of the transition section is 1.5-2.5 times that of the transition section with the larger water depth in the front unit and the rear unit; when the water depth of the device is used for connecting the regular surface flow wetland treatment unit and the regular subsurface flow wetland treatment unit, the water depth is 1.5-2.5 times of that of the regular surface flow wetland treatment unit; when the device is used for connecting the regular subsurface flow wetland treatment units, the lower bottom of the device is flush with the lower middle bottom of the front and rear units.
Preferably, the area of each group does not exceed 9000m if surface flow wetland is adopted2(ii) a If the subsurface flow wetland is adopted, the area of each group is not more than 4500m2(ii) a If the surface flow wetland and the subsurface flow wetland are combined, the area of each group is not more than 7000m2。
Furthermore, the regular surface flow wetland treatment unit, the regular horizontal subsurface flow wetland treatment unit and the regular vertical subsurface flow wetland treatment unit are rectangular, trapezoidal or fan-shaped.
The utility model discloses the innovation point lies in adding specific constructed wetland changeover portion in the middle of traditional constructed wetland. The two technical short plates which are difficult to effectively utilize the irregular ground and the water distribution uniformity of the large-scale artificial wetland are solved through the innovation.
Adopt the utility model discloses an artificial wetland, the typical treatment effect of handling rural sewage is as follows:
| item | COD | TN | TP | Ammonia nitrogen | Escherichia coli |
| Inlet (mg/L) | 55 | 28 | 2 | 22 | 90* |
| Effluent (mg/L) | 16 | 11 | 0.5 | 8 | 4* |
| Removal rate | 71％ | 61％ | 75％ | 64％ | 96％ |
Unit × 103CFU/100mL
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) the utility model realizes the construction of the special-shaped artificial wetland, solves the problem of short plates in the irregular plots in the prior art, and further enables the artificial wetland to have the landscape function of the special-shaped land and the treatment function of the traditional artificial wetland;
(2) and the traditional artificial wetland single group is broken through and 1500-3000 m2The technical limitation of (1) can realize single group of 4500-9000 m2The single group scale can be enlarged by 200% at most for the construction of the super-large artificial wetland, which is beneficial to the construction of large and super-large artificial wetlands;
(3) the utility model discloses can realize that the water distribution degree of consistency reaches more than 80% ~ 90%, more traditional constructed wetland promotes more than 10 ~ 20 percentage points, and the treatment efficiency promotes 20%, therefore also corresponding extension constructed wetland's life 20% ~ 40% more.
Drawings
Fig. 1 is a schematic plan view (two-stage series connection) of the constructed wetland constructed by the utility model.
Fig. 2 is a schematic plan view (multi-stage series connection) of the constructed wetland constructed by the utility model.
Wherein: 1-a water inlet device, 2-a water outlet device, a 3-first section of a regular artificial wetland, a 4-first transition section, a 5-second section of the regular artificial wetland, a 6-second transition section and a 7-third section of the regular artificial wetland.
Detailed Description
Referring to fig. 1, the large-scale special-shaped artificial wetland (two-stage series connection) comprises a water inlet device 1, a first section 3 of a regular artificial wetland, a first transition section 4, a second section 5 of the regular artificial wetland and a water outlet device 2. The connection relation is as follows: the water inlet device 1 is connected with the first section 3 of the regular artificial wetland, the second section 5 of the regular artificial wetland is connected with the water outlet device 2, and the first section 3 of the regular artificial wetland is connected with the second section 5 of the regular artificial wetland through the first transition section 4.
Referring to fig. 2, the large-scale special-shaped artificial wetland (multi-stage series connection) comprises a water inlet device 1, a first section 3 of a regular artificial wetland, a first transition section 4, a second section 5 of the regular artificial wetland, a second transition section 6, a third section 7 of the regular artificial wetland and a water outlet device 2. The connection relation is as follows: the water inlet device 1 is connected with the first section 3 of the regular artificial wetland, the third section 7 of the regular artificial wetland is connected with the water outlet device 2, the first section 3 of the regular artificial wetland is connected with the second section 5 of the regular artificial wetland through the first transition section 4, and the second section 5 of the regular artificial wetland is connected with the third section 7 of the regular artificial wetland through the second transition section 6.
Example 1:
according to the figure 2, under the condition of irregular land shape, a large-scale and special-shaped artificial wetland composite construction system is adopted:
(1) dividing the land block into 1 group, combining two-stage surface flow wetland and one-stage subsurface flow wetland into 3 stages in series, wherein the area of the group is 2900m2。
(2) The group of artificial wetland is divided into 3 regular artificial wetland treatment units. The adjacent 2 regular artificial wetland treatment units are connected by a transition section.
The regular artificial wetland treatment unit comprises 2 regular surface flow wetland treatment units and regular horizontal subsurface flow wetland treatment units, and the units are generally rectangular, trapezoidal or fan-shaped. The areas of the 2 regular surface flow wetland treatment units are respectively 1000m2、900m2The length-width ratio is respectively 2:1 and 8:1, the water depth is respectively 0.4m and 0.6m, and the hydraulic gradient is 0.2 percent; the area of the regular horizontal subsurface flow wetland treatment unit is 800m2Aspect ratio of 2:1, length of 20m, hydraulic slope of typically 0.6%, water depth of typically 1.2m, water surface 0.10m below substrate surface.
The transition section adopts a surface flow wetland type, and the areas of the transition section are respectively 100m2、100m2The ratio of the average length of the two transition sections in the direction of water flow to the average width perpendicular to the direction of water flow is 0.15:1 and 0.5:1, respectively.
When one surface flow wetland type transition section is used for the connection of 2 regular surface flow wetland treatment units, the water depth is 1.5 times of the larger water depth of the front and rear units; and the other surface flow wetland type transition section is used for connecting the regular surface flow wetland treatment unit and the regular horizontal subsurface flow wetland treatment unit, and the water depth of the transition section is 2.5 times that of the regular surface flow wetland treatment unit.
When one surface flow wetland type transition section is used for the connection between one regular surface flow wetland treatment unit and a regular horizontal subsurface flow wetland treatment unit, the water depth is 1.5 times that of the regular surface flow wetland treatment unit; and the other surface flow wetland type transition section is used for connecting the other regular surface flow wetland treatment unit and the regular horizontal subsurface flow wetland treatment unit, and the water depth of the transition section is 2.5 times that of the regular surface flow wetland treatment unit.
(3) The grouping is made possible by the checking step (2).
The constructed artificial wetland realizes the following effects:
1) realizes the construction of the special-shaped constructed wetland, solves the problem of short plates in the irregular land utilization in the prior art, and is advanced
So that the artificial wetland has the landscape function of the special-shaped land and the treatment function of the traditional artificial wetland;
2) adopt the utility model discloses an artificial wetland, the typical treatment effect of handling rural sewage is as follows:
| item | COD | TN | TP | Ammonia nitrogen | Escherichia coli |
| Inlet (mg/L) | 55 | 28 | 2 | 22 | 90* |
| Effluent (mg/L) | 16 | 11 | 0.5 | 8 | 4* |
| Removal rate | 71％ | 61％ | 75％ | 64％ | 96％ |
Unit × 103CFU/100mL
Example 2:
according to the figure 1, under the conditions of large land occupation and large constructed artificial wetland area, a large-scale and special-shaped artificial wetland composite construction system is adopted:
(1) will land block 10000m2Dividing into 2 groups, each group adopts two-stage surface flow wetland combination as shown in figure 1, and each group has an area of 5000m2。
(2) Each group of artificial wetland is divided into 2 regular artificial wetland treatment units. The adjacent 2 regular artificial wetland treatment units are connected by a transition section.
The regular artificial wetland treatment unit comprises two regular surface flow wetland treatment units, the unit is rectangular, and the areas of the treatment units are 2000m2、2600m2The length-width ratio is 5:1, the length-width ratio is 10:1, the water depth is 0.2m and 0.8m respectively, and the hydraulic gradient is 0.5%.
The transition section is of surface flow wetland type and has an area of 200m2、200m2The ratio of the average length of the transition section in the direction of water flow to the average width perpendicular to the direction of water flow is 1.25: 1.
The surface flow wetland type transition section is used for connecting 2 regular surface flow wetland treatment units, and the water depth of the transition section is 2.5 times of that of the unit with the larger water depth.
(3) The grouping is made possible by the checking step (2).
The constructed wetland is adjusted and constructed to realize the following effects:
(1) the single-group constructed wetland breaks through 3000m of the traditional surface flow wetland2The management difficulty is reduced and the water distribution uniformity is improved due to the limitation of the water distribution system;
(2) adopt the utility model discloses an artificial wetland handles urban non-point source pollution's typical treatment effect as shown in the following table:
| item | COD | SS | TP | Ammonia nitrogen | Escherichia coli |
| Inlet (mg/L) | 80 | 180 | 3.2 | 15 | 150* |
| Effluent (mg/L) | 18 | 20 | 0.7 | 7 | 8* |
| Removal rate | 78％ | 89％ | 78％ | 53％ | 95％ |
Unit × 103CFU/100mL
Example 3:
under the conditions of large land occupation and large area of the constructed wetland to be constructed, a large-scale and special-shaped constructed wetland composite construction system is adopted:
(1) land mass 3900m2Divided into 3 groups, each group adopts two-stage subsurface flow wetland combination, and the area of each group is 1300m2。
(2) Each group of artificial wetland is divided into 2 regular artificial wetland treatment units. The adjacent 2 regular artificial wetland treatment units are connected by a transition section.
The regular artificial wetland treatment unit comprises 2 regular horizontal subsurface wetland treatment units, and the unit is trapezoidal in shape. The treatment units of the regular horizontal subsurface flow wetland are the same, and the areas of the treatment units are all 600m2Aspect ratio of 6:1, length of 60m, hydraulic slope of typically 1.0%, water depth of typically 1.6m, and water level of 0.20m below the substrate surface.
The transition section is of a horizontal undercurrent wetland type, and the areas of the transition section and the undercurrent wetland type are respectively 50m2、50m2And the transition section is connected between the two regular horizontal subsurface flow wetland treatment units, and the ratio of the average length of the transition section along the water flow direction to the average width perpendicular to the water flow direction is 0.5: 1.
The depth of the horizontal subsurface flow wetland type transition section is the deeper one of the front and back regular horizontal subsurface flow wetland treatment units, and the filler gradation is configured as follows: 1.8-4 times of the larger effective particle size in the regular horizontal subsurface wetland treatment unit is adopted.
(3) The grouping is made possible by the checking step (2).
The constructed wetland is adjusted and constructed for treating secondary treatment tail water of a sewage plant, and the following effects are realized:
| item | COD | TN | TP | Ammonia nitrogen | Escherichia coli |
| Inlet (mg/L) | 65 | 25 | 0.9 | 15 | 20* |
| Effluent (mg/L) | 18 | 10 | 0.45 | 5 | 1* |
| Removal rate | 72％ | 60％ | 50％ | 67％ | 95％ |
Unit × 103CFU/100mL
Example 4:
under the conditions of large land occupation and large area of the constructed wetland to be constructed, a large-scale and special-shaped constructed wetland composite construction system is adopted:
(1) dividing the land into 3 groups, each group adopts two-stage subsurface flow wetland combination, and the area of each group is 540m2。
(2) Each group of artificial wetland is divided into 2 regular artificial wetland treatment units. The adjacent 2 regular artificial wetland treatment units are connected by a transition section.
The regular artificial wetland treatment unit comprises 1 regular vertical subsurface flow wetland treatment unit and 1 regular horizontal subsurface flow wetland treatment unit, and the units are fan-shaped. The area of the regular horizontal subsurface flow wetland treatment unit is 300m2Aspect ratio of 3:1, length of 30m, hydraulic slope of typically 0.5%, water depth of typically 0.4m, and water level of 0.05m below the substrate surface. The area of the regular vertical subsurface flow wetland treatment unit is 200m2The length-width ratio is 2:1, the length is 20m, the hydraulic gradient is not more than 1.0 percent, and the water depth is 1.5 m.
The transition section is of surface flow wetland type and has an area of 40m2And the transition section is connected between the regular vertical subsurface flow wetland treatment unit and the regular horizontal subsurface flow wetland treatment unit, and the ratio of the average length of the transition section along the water flow direction to the average width of the transition section perpendicular to the water flow direction is 3: 1.
The surface flow wetland type transition section is used for connecting the regular vertical subsurface flow wetland treatment unit and the regular horizontal subsurface flow wetland treatment unit, and the lower bottom of the transition section is flush with the lower middle bottom of the regular vertical subsurface flow wetland treatment unit and the regular horizontal subsurface flow wetland treatment unit.
(3) The grouping is made possible by the checking step (2).
The constructed wetland is used for treating polluted river water, and the following effects are realized:
| item | CODMn | Turbidity of water | Ammonia nitrogen | Escherichia coli |
| Inlet (mg/L) | 6 | 45* | 2 | 3** |
| Effluent (mg/L) | 3 | 5* | 0.25 | 0.5** |
| Removal rate | 50％ | 89％ | 88％ | 83％ |
*: unit NTU
Unit × 103CFU/100mL。
Claims (5)
1. A composite construction system of large and special-shaped artificial wetlands is characterized in that: the large-scale or heterotypic artificial wetland decomposes into a set or multiunit, and every artificial wetland divides into 2 or more regular artificial wetland treatment units, links up with the changeover portion between 2 adjacent regular artificial wetland treatment units, wherein:
the regular artificial wetland treatment unit comprises a regular surface flow wetland treatment unit and/or a regular subsurface flow wetland treatment unit, and the regular subsurface flow wetland treatment unit comprises a regular horizontal subsurface flow wetland treatment unit and/or a regular vertical subsurface flow wetland treatment unit;
the transition section comprises a horizontal undercurrent wetland type transition section or a surface current wetland type transition section.
2. The composite construction system of the large-scale and special-shaped artificial wetland according to claim 1, characterized in that: the area of the regular surface flow wetland treatment unit is not more than 3000m2The length-width ratio is 2: 1-10: 1, the water depth is 0.2-0.8 m, and the hydraulic gradient is not more than 0.5%;
the area of the regular horizontal subsurface flow wetland treatment unit is not more than 800m2The length-width ratio is not more than 10:1, the length is not more than 20-50 m, the hydraulic gradient is 0.5-1.0%, the water depth is 0.4-1.6 m, and the water surface is 0.05-0.20 m lower than the surface of the substrate;
the area of the regular vertical subsurface flow wetland treatment unit is not more than 1500m2The length-width ratio is 2:1, the length is not more than 20 m-50 m, the hydraulic gradient is not more than 1.0%, and the water depth is 1.5 m.
3. The composite construction system of the large-scale and special-shaped artificial wetland according to claim 1, characterized in that: the ratio of the average length of the transition section along the water flow direction to the average width of the transition section perpendicular to the water flow direction is 0.15: 1-3: 1.
4. The composite construction system of the large-scale and special-shaped artificial wetland according to claim 1, characterized in that: the depth of the horizontal subsurface flow wetland type transition section is the deeper one of the front and back regular artificial wetland treatment units, and the filler gradation is configured as follows: 1.8-4 times of the regular artificial wetland treatment units with larger effective particle size is adopted for connecting the two regular horizontal subsurface flow wetland treatment units;
when the surface flow wetland type transition section is used for connection between the regular surface flow wetland treatment units, the water depth of the transition section is 1.5-2.5 times that of the transition section with the larger water depth in the front unit and the rear unit; when the water depth of the device is used for connecting the regular surface flow wetland treatment unit and the regular subsurface flow wetland treatment unit, the water depth is 1.5-2.5 times of that of the regular surface flow wetland treatment unit; when the device is used for connecting the regular subsurface flow wetland treatment units, the lower bottom of the device is flush with the lower middle bottom of the front and rear units.
5. The composite construction system of the large-scale and special-shaped artificial wetland according to claim 1, characterized in that: the regular surface flow wetland treatment unit, the regular horizontal subsurface flow wetland treatment unit and the regular vertical subsurface flow wetland treatment unit are rectangular, trapezoidal or fan-shaped.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655193A (en) * | 2019-10-29 | 2020-01-07 | 武汉德同宜环境科技有限公司 | Composite construction method for large and special-shaped artificial wetland |
| CN110655193B (en) * | 2019-10-29 | 2024-05-31 | 武汉德同宜环境科技有限公司 | Composite construction method of large-scale and abnormal-shaped constructed wetland |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110655193A (en) * | 2019-10-29 | 2020-01-07 | 武汉德同宜环境科技有限公司 | Composite construction method for large and special-shaped artificial wetland |
| CN110655193B (en) * | 2019-10-29 | 2024-05-31 | 武汉德同宜环境科技有限公司 | Composite construction method of large-scale and abnormal-shaped constructed wetland |
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