CN112028192A - Method for treating cyanobacterial bloom by combining green film, disturbance and zinc elements - Google Patents
Method for treating cyanobacterial bloom by combining green film, disturbance and zinc elements Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Abstract
The invention discloses a method for treating cyanobacterial bloom by combining green film, disturbance and zinc elements, belonging to the field of water body ecological restoration. The method of the invention covers a green transparent film on the water surface where the cyanobacterial bloom is formed, combines the disturbance of the water body for several days, and splashes ZnCl with a certain concentration2(ii) a The green transparent film, the disturbance and the zinc element can form a synergistic effect, the blue algae can be obviously killed, the number of the blue algae is reduced, the blue algae removal rate can reach more than 95 percent, and the water bloom density range of the blue algae is 0.1-100 multiplied by 108Cells/liter. The method is simple, low in cost and strong in operability, and can be used for treating the cyanobacterial bloom of water bodies such as lakes, reservoirs, rivers, ponds and the like.
Description
Technical Field
The invention relates to a method for treating cyanobacterial bloom by combining green film, disturbance and zinc elements, belonging to the field of water body ecological restoration.
Background
Along with the rapid development of economy in China, the eutrophication of a plurality of lakes and reservoirs is becoming more and more serious due to the generation and discharge of a large amount of pollutants. Due to eutrophication, many lakes, reservoirs and rivers burst cyanobacterial bloom, which causes great influence and loss on people's social life and production. How to prevent and control cyanobacterial bloom becomes a focus of attention of governments and common people.
Up to now, the methods for preventing and controlling cyanobacterial bloom mainly include physical, chemical and biological methods. The physical methods include a salvage method (mechanical salvage and manual salvage), a flocculation sedimentation method, a water changing method, a high-pressure algae killing method, an ultraviolet algae killing method and an ultrasonic algae killing method. The traditional physical method consumes a large amount of manpower, material resources and financial resources, and treats both the symptoms and the root causes. The chemical methods comprise a chemical agent algae killing method and an oxidant algae killing method, the chemical agent algae killing efficiency is high, but secondary pollution problems are caused, such as copper sulfate; the oxidant used in the oxidant algicidal method, such as hydrogen peroxide, has poor effect on high-concentration field population blue algae. The biological method comprises microbiological method, plant induction method, zooplankton feeding method, benthonic animal feeding method, and fish feeding method. Biological methods are generally long in period, greatly influenced by environmental factors and uncontrollable.
Therefore, finding a safe and controllable method for treating cyanobacterial bloom becomes a hotspot of research.
Disclosure of Invention
In order to solve at least one problem, the invention provides a method for treating cyanobacterial bloom by combining green membrane, disturbance and zinc elements, which comprises the steps of covering a layer of green transparent film on a cyanobacterial bloom water body, combining water body disturbance for several days, and splashing ZnCl with a certain concentration2The removal rate of the blue algae can reach more than 95 percent, and the density range of the blue algae bloom is 0.1-100 multiplied by 108Cells/liter. The method is simple and easy to operate, and has good popularization and application prospects.
The first purpose of the invention is to provide a method for treating cyanobacterial bloom by using a combination of a green film, disturbance and zinc elements, which comprises the steps of covering a layer of green transparent film on a cyanobacterial bloom water body, adding the zinc elements and disturbing the water body by a surge pump for a plurality of days.
In one embodiment of the invention, the green color includes yellow green, pink green, light green, medium green, grass green, olive green, emerald green, or aqua green, etc., classified by 36 colors in the art.
In an embodiment of the present invention, the material of the green transparent film is one of polyester resin, polyethylene, and polypropylene.
In one embodiment of the invention, the thickness of the green transparent film is 0.1-0.3 mm, and the distance above the water body is 0.1-0.4 m from the water surface.
In an embodiment of the present invention, the power of the surge pump is 0.75kW to 2.2kW, more preferably 1.5kW to 2.2kW, and still more preferably 2.2 kW.
In one embodiment of the invention, the time for the surge pump to disturb the water body is 7-10 days; more preferably 8 to 9 days, and still more preferably 8 days.
In one embodiment of the invention, the zinc element is formed by ZnCl2Of the form (1) of ZnCl2The concentration range in the water body is 0.4-0.8 mg/L, more preferably 0.6-0.8 mg/L, and still more preferably 0.6 mg/L.
The second purpose of the invention is to apply the method for treating the cyanobacterial bloom by combining the green film, the disturbance and the zinc element in the field of cyanobacterial bloom prevention and control.
In one embodiment of the present invention, the density of the cyanobacteria is in the range of 0.1 to 100 × 108Cells/liter.
In one embodiment of the invention, the method is used for blue algae bloom treatment of the fresh water body.
In one embodiment of the invention, the method is used for blue algae bloom treatment of water bodies such as lakes, reservoirs, rivers, ponds and the like.
The invention has the following beneficial technical effects:
(1) the invention covers a green transparent film on the water surface of the cyanobacterial bloom, combines the disturbance of the water body for several days, and adds ZnCl with a certain concentration2The three can form a synergistic effect to obviously kill the blue algae and reduce the number of the blue algae, and the density range of the blue algae water bloom is 0.1-100 multiplied by 108Cell/liter) removal rate can reach more than 95 percent.
(2) The method is simple and easy to operate, can realize the killing of the blue algae, has low cost and has good popularization and application prospects.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of better illustrating the invention and is not intended to limit the invention thereto.
Example 1
In order to understand the control effect of different green transparent films on the cyanobacterial bloom, the experiment is carried out in a certain tin-free river channel, one section (40 m long and 10m wide) of the certain tin-free river channel is taken to carry out the experiment, wherein the treatment group 1: covering a polyester resin medium-green transparent film (with the thickness of 0.2mm) above the water surface (0.4 m); treatment group 2: covering a polyethylene middle green transparent film (with the thickness of 0.2mm) above the water surface (0.4 m); treatment group 3: covering a polypropylene medium green transparent film (with the thickness of 0.2mm) above the water surface (0.4 m); all treatment groups had an area of 100m2(10 multiplied by 10m), 2.2kW surge pump is selected to disturb the water body for 8 days, and ZnCl is splashed2So that ZnCl in the water body2Is 0.4 mg/l; control group (10 × 10 m): no covering, no water body disturbance, no trace elements.
The initial blue algae densities of the control group, the treatment group 1, the treatment group 2 and the treatment group 3 are respectively 9.75 multiplied by 108Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
At the end of the experiment, the blue algae density of the control group was significantly increased, while the blue algae density of the treatment groups 1, 2 and 3 was significantly decreased (see table 1). Experiments show that the green transparent film made of the polyester resin, the polyethylene and the polypropylene has an efficient blue algae killing effect.
TABLE 1 influence of green transparent films of different materials on blue algae growth rate
Example 2
In order to know the control effect of the surge pumps with different powers on the cyanobacterial bloom, the experiment is carried out in a certain tin-free river channel, one section (40 meters long and 10 meters wide) of the certain tin-free river channel is taken for carrying out the experiment, and the treatment group 1 comprises: selecting a surge pump of 0.75 kW; treatment group 2: choose to useA surge pump of 1.5 kW; treatment group 3: selecting a 2.2kW surge pump; the upper parts (0.4m) of the water surfaces of the treatment groups 1, 2 and 3 are covered with a green transparent film (0.2mm) in the polyester resin group; all treatment groups had an area of 100m2(10 × 10 m): the surge pump is used for disturbing the water body for 8 days and is splashed with ZnCl2So that ZnCl in the water body2Is 0.4 mg/l; control group 100m2(10 × 10 m): no covering, no water body disturbance, no trace elements.
The initial blue algae density of the control group, the treatment group 1, the treatment group 2 and the treatment group 3 is 9.48 multiplied by 108Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
At the end of the experiment, the blue algae density of the control group was significantly increased, while the blue algae density of the treatment groups 1, 2 and 3 was significantly decreased (see table 2). Experiments show that three surge pumps with different powers of 0.75kW, 1.5kW and 2.2kW have the efficient effect of killing blue algae.
TABLE 2 influence of different power surge pumps on the growth rate of blue algae
Example 3
In order to discuss the control effect of different disturbance time on the cyanobacterial bloom, an experiment is carried out on a certain tin-free river channel, a section (50 meters in length and 10 meters in width) of the certain tin-free river channel is taken for carrying out the experiment, and the initial density of the cyanobacterial in a control group and all treatment groups is set to be 9.64 multiplied by 10, wherein the different continuous disturbance time is respectively 6 days, 7 days, 8 days, 9 days and 10 days8Cells/liter (blue algae density measuring method refer to chapter article, Huangxiangfei research method for freshwater plankton), and green transparent film (0.2mm) and polyethylene material are used in all treatment groups. 0.4m above the water body; all treatment groups had an area of 100m2(10 x 10m) are disturbed by a 2.2kW surge pump and are splashed with ZnCl2So that ZnCl in the water body2Is 0.4 mg/l; control group 100m2(10 x 10m) has no covering and does not disturb the water body.
The results show that the cyanobacteria density decreased significantly at the end of the experiment for the different perturbation time groups (see table 3). Therefore, if the method is based on the removal rate of 95 percent of the blue algae, and in consideration of the effect and the cost, the disturbance time range for treating the blue algae bloom by the method is 7 to 9 days.
TABLE 3 Effect of different perturbation times on the growth rate of blue algae
Example 4
To discuss adding different zinc elements (ZnCl)2) The control effect of the concentration on the cyanobacteria bloom is realized by carrying out an experiment on a certain tin-free river channel, taking a section (40 meters in length and 10 meters in width) of the certain tin-free river channel to carry out the experiment, and setting ZnCl in water bodies in different treatment groups2The concentrations of (A) are respectively 0.2 mg/L, 0.4 mg/L, 0.6 mg/L and 0.8 mg/L, and the initial density of blue algae in the control group and all the treatment groups is 10.74 multiplied by 108Cells/liter (blue algae density measuring method is referred to chapter interference, Huangxiangfei research method for freshwater plankton), a green transparent film (0.2mm) is used in all treatment groups, polyethylene materials are used 0.4m above a water body, 2.2kW surge pumps are used for disturbing the water body for 8 days, and the area of all the treatment groups is 100m2(10X 10 m). Control group 100m2(10 x 10m) has no covering and does not disturb the water body.
The results show that the blue algae density is reduced remarkably when different zinc element groups are added at the end of the experiment (see table 4). Therefore, if the method is based on the blue algae removal rate of 95 percent and considering the effect and the cost, the method treats the ZnCl of the blue algae bloom2The concentration range of the water-soluble organic compound in the water body is 0.4-0.6 mg/L.
TABLE 4 influence of zinc element of different concentrations on blue algae growth rate
Example 5
In order to know the control effect of the method on different blue algae densities, experiments are carried out on a certain tin-free river channel, experiments are carried out on a section (50 meters in length and 10 meters in width) of the certain tin-free river channel, and the blue algae densities are respectively set to be 0.1 multiplied by 10812.5X 10 cells/liter825X 10 cells/liter8Cell/liter, 50.0X 108100.0X 10 cells/liter8Cells/liter, all treatment groups are medium green transparent films (0.2mm) and polyethylene materials, and the treatment groups are arranged 0.4m above the water body; all treatment groups had an area of 100m2(10 x 10m), 2.2kW surge pump is used for disturbing the water body for 9 days, and ZnCl is splashed2So that ZnCl in the water body2Is 0.6 mg/l2。
The results show that the blue algae density of the blue algae group with different densities is obviously reduced at the end of the experiment (see table 5) (the blue algae density measuring method refers to chapter, Huangxiangfei, research method of freshwater plankton). Therefore, if the method is based on the removal rate of 95 percent of blue algae, the method is suitable for treating the blue algae bloom with the density range of 0.1-100 multiplied by 108Cells/liter.
TABLE 5 Effect of the method of example 5 on the growth rate of blue algae of different densities
Comparative example 1
Carrying out an experiment on a certain tin-free river channel, taking a section (50 meters in length and 10 meters in width) of the certain tin-free river channel to carry out the experiment, and covering a green transparent film (0.2mm) in polyester resin above the water surface (0.4 m); no water body disturbance is carried out, and no zinc element is added.
The density of the blue algae treated initially is 0.1 multiplied by 10812.5X 10 cells/liter825X 10 cells/liter8Cell/liter, 50.0X 108100.0X 10 cells/liter8Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
At the end of the experiment, it was found that the effect of killing blue algae with green film only was poor (see table 6).
TABLE 6 influence of the method of comparative example 1 on the growth rate of blue-green algae of different densities
Comparative example 2
The experiment is carried out in a certain tin-free river channel, a certain tin-free river channel section (with the length of 50 meters and the width of 10 meters) is taken for carrying out the experiment, water body disturbance (with the power of 2.2kW and the time of 8 days) is carried out, a green transparent film is not covered, and the zinc element is not added.
The density of the blue algae treated initially is 0.1 multiplied by 10812.5X 10 cells/liter825X 10 cells/liter8Cell/liter, 50.0X 108100.0X 10 cells/liter8Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
At the end of the experiment, it was found that the effect of killing blue algae by only using water disturbance was poor (see table 7).
TABLE 7 influence of the method of comparative example 2 on the growth rate of blue-green algae of different densities
Comparative example 3
Carrying out experiment in a certain stanniferous river course, taking a section (40 m in length and 10m in width) of the certain stanniferous river course to carry out experiment, and adding zinc element (ZnCl)2The concentration in the water body is 0.6 mg/L), the water body disturbance is not carried out (the power is 2.2kW, the time is 8 days), and the green transparent film is not covered.
The density of the blue algae treated initially is 0.1 multiplied by 10812.5X 10 cells/liter825X 10 cells/liter8Cell/liter, 50.0X 108100.0X 10 cells/liter8Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
At the end of the experiment, it was found that the effect of killing blue algae by adding only zinc element was very poor (see table 8).
TABLE 8 influence of the method of comparative example 3 on the growth rate of blue-green algae of different densities
Comparative example 4
The experiment is carried out in a certain tin-free river channel, the experiment is carried out in a certain tin-free river channel section (with the length of 40 meters and the width of 10 meters), the water body disturbance (with the power of 2.2kW and the time of 8 days) is carried out without adding zinc, and a middle green transparent film (with the thickness of 0.2mm) is covered above the water body (at the position of 0.4 m).
The density of the blue algae treated initially is 0.1 multiplied by 10812.5X 10 cells/liter825X 10 cells/liter8Cell/liter, 50.0X 108100.0X 10 cells/liter8Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
The results are shown in Table 9.
TABLE 9 influence of the method of comparative example 4 on the growth rate of blue-green algae of different densities
Comparative example 5
Carrying out experiment in a certain stanniferous river course, taking a section (40 m in length and 10m in width) of the certain stanniferous river course to carry out experiment, and adding zinc element (ZnCl)2Concentration in water was 0.6 mg/l), no water disturbance was applied (power 2.2kW, time 8 days), and a medium green transparent film (0.2mm) was covered over the water (0.4 m).
The density of the blue algae treated initially is 0.1 multiplied by 10812.5X 10 cells/liter825X 10 cells/liter8Cell/liter, 50.0X 108100.0X 10 cells/liter8Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
The results are shown in Table 10.
TABLE 10 influence of the method of comparative example 5 on the growth rate of blue-green algae of different densities
Comparative example 6
Carrying out experiment in a certain stanniferous river course, taking a section (40 m in length and 10m in width) of the certain stanniferous river course to carry out experiment, and adding zinc element (ZnCl)2Concentration in water was 0.6 mg/l), water disturbance (power 2.2kW, time 8 days) was performed, covering no middle green transparent film (0.2mm) above the water (0.4 m).
The density of the blue algae treated initially is 0.1 multiplied by 10812.5X 10 cells/liter825X 10 cells/liter8Cell/liter, 50.0X 108100.0X 10 cells/liter8Cell/liter (blue algae density determination method refer to chapter article, Huangxiangfei's research method of freshwater plankton).
The results are shown in Table 11.
TABLE 11 influence of the method of comparative example 6 on the growth rate of blue-green algae of different densities
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for treating cyanobacterial bloom by combining a green film, disturbance and zinc elements is characterized by covering a layer of green transparent film above a cyanobacterial bloom water body, adding the zinc elements and disturbing the water body by a surge pump for a plurality of days.
2. The method for treating cyanobacterial bloom by using the combination of the green film, the disturbance element and the zinc element as claimed in claim 1, wherein the green transparent film is made of one of polyester resin, polyethylene and polypropylene.
3. The method for treating cyanobacterial bloom by using the combination of green film, disturbance and zinc elements as claimed in claim 1 or 2, wherein the power of the surge pump is 0.75 kW-2.2 kW.
4. The method for treating cyanobacterial bloom by using the combination of the green film, the disturbance and the zinc element according to any one of claims 1 to 3, wherein the time for disturbing the water body by the surge pump is 7 to 10 days.
5. The method for treating cyanobacterial bloom by using the combination of the green film, the disturbance and the zinc element according to any one of claims 1 to 4, wherein the zinc element is ZnCl2Of the form (1) of ZnCl2The concentration range of the water-soluble organic compound in the water body is 0.4-0.8 mg/L.
6. The method for treating cyanobacterial bloom by using the combination of the green film, the disturbance and the zinc element according to claim 1 or 4, wherein the time for the surge pump to disturb the water body is 8-9 days.
7. The method for treating cyanobacterial bloom by combining green film, disturbance and zinc element according to claim 5, wherein ZnCl is used as the main component2The concentration range in the water body is 0.6-0.8 mg/L.
8. The application of the method for treating cyanobacterial bloom by using the combination of the green film, the disturbance and the zinc element in any one of claims 1 to 7 in the field of cyanobacterial bloom prevention and control.
9. The use of claim 8, wherein the density of cyanobacterial bloom is in the range of 0.1-100 x 108Cells/liter.
10. The use according to claim 8 or 9, for cyanobacterial bloom remediation of lake, reservoir, river or pond water bodies.
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| CN113511711A (en) * | 2021-04-12 | 2021-10-19 | 无锡市太湖湖泊治理股份有限公司 | Method for emergency treatment of cyanobacterial bloom |
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