WO2021238118A1 - Ecological soft enclosure for algae and sewage interception and purification, and construction method therefor - Google Patents

Abstract

An ecological soft enclosure for algae and sewage interception and purification, and a construction method therefor. The ecological soft enclosure comprises an underwater low weir (6), pile bodies (1), a first soft enclosure (4) and a second soft enclosure (3), wherein the first soft enclosure (4) and the second soft enclosure (3) are arranged in a water body at an interval; the underwater low weir (6) is arranged at the bottom of the water body between the first soft enclosure (4) and the second soft enclosure (3); submerged plants (7) are grown on the underwater low weir (6); and attached algae membranes (5) are arranged on the inner side face of the first soft enclosure (4) and/or the second soft enclosure (3). According to the ecological soft enclosure for algae and sewage interception and purification, and the construction method therefor, the exchange of water bodies on the two sides of the enclosures is slowed down by means of the second soft enclosure (3) and the first soft enclosure (4), such that a water flow passes through the submerged plants (7) on the underwater low weir (6) to be subjected to nitrogen and phosphorus absorption and water quality purification, and secondary absorption of nitrogen and phosphorus is finally performed by means of the attached algae membranes (5), thereby greatly reducing the problem of eutrophication of the water bodies.

Description

Ecological soft enclosure for algae interception and pollution purification and its construction method Technical field

The invention relates to the technical field of ecological environment engineering, in particular to an ecological soft enclosure for algae interception and pollution purification and a construction method thereof.

Background technique

It is easy to produce waste water containing a lot of nitrogen and phosphorus in daily life, industrial and agricultural production. These waste water enters rivers, lakes and other water bodies without treatment, which will cause eutrophication of the water body, and then cause the rapid propagation of algae to form "water blooms". Cause disastrous consequences.

At present, water eutrophication is widespread in my country's water environment, and the situation of water bloom prevention and control is severe. The interception of algae and pollution, and purification of sewage into rivers and lakes are important prevention and control measures. At present, physical algae interception technology and sewage purification technology for rivers and lakes have been partially applied. However, how to achieve the purification of lake sewage at the same time in the process of physical algae interception requires further research. New technical methods can be explored. to fulfill.

Summary of the invention

The main technical problem solved by the present invention is to provide an ecological soft enclosure for algae interception and pollution purification and a construction method thereof to intercept and purify sewage and avoid the problem of blooming.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide an ecological soft enclosure for algae interception and pollution purification, including: underwater short weir, pile body, first soft enclosure and second soft enclosure The first soft enclosure and the second soft enclosure are arranged in the water body at intervals, the tops of the first soft enclosure and the second soft enclosure are respectively provided with floating bodies, the The bottoms of the first soft enclosure and the second soft enclosure are respectively provided with counterweights and fixed at the bottom of the water body, and the piles are arranged at intervals on one side of the first soft enclosure and the second soft enclosure. The bottom extends downward to the soil layer at the bottom of the water body for fixing, the first soft enclosure and the second soft enclosure are respectively provided with connecting pieces sleeved on the pile, and the underwater short weir is provided At the bottom of the water body between the first soft enclosure and the second soft enclosure, submerged plants are planted on the underwater short weir, and the first soft enclosure and/or the second soft enclosure Adhesive algae film is provided on the inner side of the.

In a preferred embodiment of the present invention, the floating body includes, but is not limited to, a float and a pontoon.

In a preferred embodiment of the present invention, the connecting member is a steel wire rope or a ring body, and the top of the first soft enclosure and the second soft enclosure are provided with fixing holes corresponding to the connecting member at intervals.

In a preferred embodiment of the present invention, the ring body includes a steel ring and a plastic ring.

In a preferred embodiment of the present invention, the weight body includes a gravel bag.

In a preferred embodiment of the present invention, a gear rod is radially arranged on the top of the pile.

In a preferred embodiment of the present invention, the underwater short weir includes stacked geotextile bags, and the geotextile bags are filled with soil and/or gravel.

In a preferred embodiment of the present invention, the bottom of the water body is provided with barriers located on one or both sides of the counterweight, and the barriers include, but are not limited to, rocks and soil bags.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a construction method of ecological soft enclosure, which includes the following steps:

For the stacking of underwater short weirs, geotextile bags are arranged in the width direction at the inlet of the water body. After the geotextile bags are filled with soil, they are stacked in the water body to form an underwater short weir, and the top of the underwater short weir is 0.5 to 1.5m away from the water surface;

For the planting of submerged plants, wrap the roots of submerged plants in soil and wraps, throw them into the water body, and sink to the underwater short weir. Three months after planting is completed, the survival rate is tested, and the survival rate is low. Replanting in some areas;

Pile driving, arrange the piles at intervals in the water on both sides of the underwater short weir, so that the bottom of the pile is inserted into the soil below the water for several meters to be fixed, and the top of the pile protrudes above the water;

The arrangement of the first soft enclosure and the second soft enclosure, the first soft enclosure and the second soft enclosure are respectively arranged on the side of the pile on both sides of the underwater short weir, and the second soft enclosure The partition is located near the water inlet side of the water body, and the inner surface of the first soft enclosure is provided with an adherent algae film;

To fix the first soft enclosure and the second soft enclosure, install the connecting pieces on the first soft enclosure and the second soft enclosure, and set the connecting pieces on the corresponding piles. Floating bodies are installed on the tops of a soft enclosure and a second soft enclosure to keep the tops of the first soft enclosure and the second soft enclosure not below the water surface. A counterweight is installed at the bottom of the partition so that the bottom of the first soft partition and the second soft partition sink into the bottom of the water, and barriers are placed on one or both sides of the Movement of the bottom of the soft enclosure and the second soft enclosure.

In a preferred embodiment of the present invention, the adherent algae film is formed by the adherent algae growing on the inner surface of the first soft enclosure to form a film body that absorbs nitrogen and phosphorus.

The beneficial effects of the present invention are: the ecological soft enclosure for algae interception, pollution interception and purification pointed out by the present invention and its construction method, through the second soft enclosure and the first soft enclosure to slow down the exchange of water bodies on both sides of the enclosure , So that the water flows through the submerged plants on the underwater short weir to absorb nitrogen and phosphorus and purify the water quality. Finally, the secondary absorption of nitrogen and phosphorus through the adherent algae film greatly reduces the eutrophication problem of the water body, and The second soft enclosure can intercept the algae in the sewage, which limits the range of algae activities and has good controllability. The intercepted algae is also conducive to the concentrated consumption of nitrogen and phosphorus.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Fig. 1 is a schematic structural view of a preferred embodiment of an ecological soft enclosure for algae interception, pollution interception and purification and its construction method according to the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Taking a lake with a water depth of about 3m as an example, the embodiments of the present invention include:

As shown in Figure 1, the ecological soft enclosure for algae interception and pollution purification includes: underwater short weir 6, pile 1, first soft enclosure 4 and second soft enclosure 3, the first soft enclosure The partition 4 and the second soft partition 3 are arranged in the water body at intervals to intercept and reduce the speed of the water flow, and the second soft partition 3 can intercept the algae in the sewage, which limits the range of algae activities and facilitates salvage , Good controllability. The first soft enclosure 4 and the second soft enclosure 3 are respectively made of geotextile with a specification of 20m×3.2m, each section is 20m, and they are connected as a whole by ropes.

The tops of the first soft enclosure 4 and the second soft enclosure 3 are respectively provided with a floating body 8. The floating body 8 includes but is not limited to a floating ball and a pontoon. In this embodiment, the floating body 8 adopts a floating ball. The cost is low, so that the tops of the first soft enclosure 4 and the second soft enclosure 3 are not lower than the water surface, and the direct flow of water and algae into the lake can be avoided.

The bottoms of the first soft enclosure 4 and the second soft enclosure 3 are respectively provided with a weight body 11 and fixed at the bottom of the water body. The weight body 11 can be a gravel bag with a self-weight to enhance the first soft enclosure 4 and The bottom of the second soft enclosure 3 is stable and low in cost. In this embodiment, the bottom of the water body is also provided with barriers 10 located on one or both sides of the weight body 11. The barrier 10 is made of stones or soil bags, which can squeeze the silt 2 at the bottom of the water body and block the first soft The movement of the bottoms of the enclosure 4 and the second soft enclosure 3 further improves the stability of the bottoms of the first soft enclosure 4 and the second soft enclosure 3 and avoids the problem of water flowing from the bottom.

The piles 1 are arranged at intervals on one side of the first soft enclosure 4 and the second soft enclosure 3, and the bottom extends down to the soil layer at the bottom of the water body for fixing. In this embodiment, the pile 1 adopts Concrete piles, with a specification of 0.35m×0.35m×7.5m, with high structural strength. Pile 1 can be inserted into the soil at the bottom of the lake at a depth of 4.5m to ensure the stability of the first soft enclosure 4 and the second soft enclosure 3 effect.

The first soft enclosure 4 and the second soft enclosure 3 are respectively provided with connecting pieces 9 sleeved on the pile body 1, and the tops of the first soft enclosure 4 and the second soft enclosure 3 are arranged at intervals The fixing hole corresponding to the connecting piece 9 facilitates the installation of the connecting piece 9. The connecting piece 9 is sleeved on the pile body 1, which can move up and down flexibly and adapt to the change of the water surface. The top of the pile body 1 is radially provided with a gear rod 12, The slippage of the connecting piece 9 is avoided. During flood discharge, the connecting piece 9 can be manually detached from the pile 1 to facilitate flood discharge.

In this embodiment, the connecting member 9 is a steel wire rope or a ring body. The ring body includes a steel ring and a plastic ring. The steel ring has high strength but poor corrosion resistance. The plastic ring has good corrosion resistance, but the strength is average. Therefore, the connection Part 9 is more secure with steel wire rope, and construction is also more convenient.

The underwater short weir 6 is set at the bottom of the water body between the first soft enclosure 4 and the second soft enclosure 3. In this embodiment, the underwater short weir 6 is formed by stacking geotextile bags, which are packed in geotextile bags. There is soil and/or gravel to ensure the stability of the structure. Submerged plants 7 are planted on the underwater short weir 6, so that water flows through the submerged plants 7 for the first nitrogen and phosphorus absorption and water purification, the first soft enclosure 4 and/or the second soft enclosure 4 The inner surface of 3 is provided with an adherent algae film 5 for the second nitrogen and phosphorus absorption and water purification, reducing the nitrogen and phosphorus content in the water stream.

Taking a lake with a water depth of about 3m as an example, an embodiment of the construction method of an ecological soft enclosure of the present invention includes the following steps:

For the stacking of underwater short weirs 6, geotextile bags are arranged in the width direction at the inlet of the water body. After the geotextile bags are filled with soil, they are stacked in the water body to form underwater short weirs 6, as shown in Figure 1, the cross section of underwater short weirs 6 is roughly It has a trapezoidal shape and a stable structure, and makes the top of the underwater short weir about 1m away from the water surface, which is conducive to the subsequent growth of submerged plants;

For the planting of submerged plants 7, wrap the roots of submerged plants with soil and wraps, throw them into the water body, sink to the underwater short weir 6, and grow automatically. Three months after planting is completed, the survival rate is tested, Replanting some areas with low survival rate to realize the uniform distribution of submerged plants 7 on the underwater short weir 6 to absorb nitrogen and phosphorus and purify water quality;

For pile driving, arrange the piles 1 at intervals in the water on both sides of the underwater short weir 6, so that the bottom of the piles 1 is inserted into the soil under the water to be fixed, and the top of the piles protrudes above the water surface to facilitate subsequent construction. In this embodiment, the distance between two rows of piles 1 is 5m, and the distance between two adjacent piles in each row is 4m;

The arrangement of the first soft enclosure 4 and the second soft enclosure 3 is to set the first soft enclosure 4 and the second soft enclosure 3 on the side of the pile 1 on both sides of the underwater short weir 6, respectively, And the second soft enclosure 3 is located near the inlet side of the water body to intercept the algae in the sewage, the first soft enclosure 4 is located on the side of the lake, and the inner surface of the first soft enclosure 4 is provided with adherent algae The membrane performs nitrogen and phosphorus absorption and water purification. In this embodiment, the adherent algae film 5 is a nitrogen and phosphorus absorbing film formed by the adherent algae growing on the inner surface of the first soft enclosure 4. Cladosium can be used as algae, which consumes a lot of nitrogen and phosphorus;

The fixing of the first soft enclosure 4 and the second soft enclosure 3, as shown in Figure 1, when the water flows into the lake from right to left, the first soft enclosure 4 and the second soft enclosure 3 can be set On the right side of the corresponding pile 1, make full use of the limit of the pile 1, so that the first soft enclosure 4 and the second soft enclosure 3 partially protrude on the left side of the pile 1 under the action of water flow. The connecting piece 9 is installed on the first soft enclosure 4 and the second soft enclosure 3, and the connecting piece 9 is sleeved on the corresponding pile 1, which is convenient for installation;

By installing floating bodies 8 on the tops of the first soft enclosure 4 and the second soft enclosure 3, the tops of the first soft enclosure 4 and the second soft enclosure 3 are kept not lower than the water surface, and sewage directly enters the lake. , Install the counterweight 11 at the bottom of the first soft enclosure 4 and the second soft enclosure 3, so that the bottom of the first soft enclosure 4 and the second soft enclosure 3 sink into the water, with high stability and Put barriers on one or both sides of the weight body 11 to squeeze the silt 2 at the bottom of the water body and block the movement of the bottom of the first soft enclosure 4 and the second soft enclosure 3 to avoid water flow from the first soft enclosure. The bottom of the partition 4 and the second soft partition 3 flows out, and the first soft partition 4 and the second soft partition 3 are regularly inspected and replaced to avoid the loss of control of sewage due to damage.

In summary, the ecological soft enclosure for algae interception and pollution purification and its construction method pointed out in the present invention realize the interception of algae in sewage and purification of water quality, by slowing down the exchange of water bodies, and using submerged plants and attached algae The membrane absorbs nitrogen and phosphorus, reduces the nitrogen and phosphorus content of lakes and other water bodies, and is more convenient for construction and maintenance.

The above are only embodiments of the present invention, and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the present invention, or directly or indirectly applied to other related technical fields, is the same. It is included in the scope of patent protection of the present invention.

Claims (10)

An ecological soft enclosure for algae interception and pollution purification, used for algae interception and sewage purification of water bodies, characterized by comprising: underwater short weir, pile body, first soft enclosure and second soft enclosure The first soft enclosure and the second soft enclosure are arranged in the water body at intervals, the tops of the first soft enclosure and the second soft enclosure are respectively provided with floating bodies, the The bottoms of the first soft enclosure and the second soft enclosure are respectively provided with counterweights and fixed at the bottom of the water body, and the piles are arranged at intervals on one side of the first soft enclosure and the second soft enclosure. The bottom extends downward to the soil layer at the bottom of the water body for fixing, the first soft enclosure and the second soft enclosure are respectively provided with connecting pieces sleeved on the pile, and the underwater short weir is provided At the bottom of the water body between the first soft enclosure and the second soft enclosure, submerged plants are planted on the underwater short weir, and the first soft enclosure and/or the second soft enclosure Adhesive algae film is provided on the inner side of the. The ecological soft enclosure for algae interception, pollution interception and purification according to claim 1, wherein the floating body includes, but is not limited to, a float and a pontoon. The ecological soft enclosure for algae interception and pollution purification according to claim 1, wherein the connecting member is a steel wire rope or a ring body, and the top of the first soft enclosure and the second soft enclosure are spaced apart from each other. There are fixing holes corresponding to the connecting piece. The ecological soft enclosure for algae interception and pollution purification according to claim 3, wherein the ring body comprises a steel ring and a plastic ring. The ecological soft enclosure for algae interception, pollution interception and purification according to claim 1, wherein the counterweight comprises a gravel bag. The ecological soft enclosure for algae interception, pollution interception and purification according to claim 1, characterized in that the top of the pile is radially provided with a stop rod. The ecological soft enclosure for algae interception, pollution interception and purification according to claim 1, wherein the underwater short weir comprises stacked geotextile bags, and the geotextile bags are filled with soil and/or gravel. The ecological soft enclosure for algae interception, pollution, purification and purification according to claim 1, wherein the bottom of the water body is provided with barriers located on one or both sides of the counterweight, and the barriers include but are not limited to stones And soil bags. An ecological soft enclosure construction method is characterized in that it comprises the following steps: For the stacking of underwater short weirs, geotextile bags are arranged in the width direction at the inlet of the water body. After the geotextile bags are filled with soil, they are stacked in the water body to form an underwater short weir, and the top of the underwater short weir is 0.5 to 1.5m away from the water surface; For the planting of submerged plants, wrap the roots of submerged plants in soil and wraps, throw them into the water body, and sink to the underwater short weir. Three months after planting is completed, the survival rate is tested, and the survival rate is low. Replanting in some areas; Pile driving, arrange the piles at intervals in the water on both sides of the underwater short weir, so that the bottom of the pile is inserted into the soil below the water for several meters to be fixed, and the top of the pile protrudes above the water; The arrangement of the first soft enclosure and the second soft enclosure, the first soft enclosure and the second soft enclosure are respectively arranged on the side of the pile on both sides of the underwater short weir, and the second soft enclosure The partition is located near the water inlet side of the water body, and the inner surface of the first soft enclosure is provided with an adherent algae film; To fix the first soft enclosure and the second soft enclosure, install the connecting pieces on the first soft enclosure and the second soft enclosure, and set the connecting pieces on the corresponding piles. Floating bodies are installed on the tops of a soft enclosure and a second soft enclosure to keep the tops of the first soft enclosure and the second soft enclosure not below the water surface. A counterweight is installed at the bottom of the partition so that the bottom of the first soft partition and the second soft partition sink into the bottom of the water, and barriers are placed on one or both sides of the Movement of the bottom of the soft enclosure and the second soft enclosure. The construction method of the ecological soft enclosure according to claim 9, wherein the adherent algae film is formed by the adherent algae growing on the inner surface of the first soft enclosure to form a film body that absorbs nitrogen and phosphorus.

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