CN111777141A - Landscape water body algae pollution treatment method and treatment system - Google Patents
Landscape water body algae pollution treatment method and treatment system Download PDFInfo
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- CN111777141A CN111777141A CN202010597930.5A CN202010597930A CN111777141A CN 111777141 A CN111777141 A CN 111777141A CN 202010597930 A CN202010597930 A CN 202010597930A CN 111777141 A CN111777141 A CN 111777141A
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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Abstract
The invention discloses a method and a system for treating algae pollution of landscape water. The processing method comprises the following steps: (1) setting a plurality of detection points in a water area to be treated, wherein the interval between adjacent detection points is 5-15 m, (2) detecting the turbidity and chlorophyll a value of one detection point, judging the algae pollution degree, (3) when the algae pollution degree is more than a preset value, performing algae removal treatment at the detection point, and (4) moving to another detection point, and repeating the step (2) until the detection of all the detection points is completed. The treatment method is suitable for emergency algae removal of closed slow-flow landscape water bodies such as urban rivers, lakes and the like, has high algae removal efficiency, and can avoid secondary outbreak of algae pollution.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a system for treating algae pollution of landscape water.
Background
In recent years, with the development of cities and industries, a large amount of organic or inorganic nutrients such as nitrogen and phosphorus enter peripheral water bodies due to production and living activities of human beings, eutrophication of the water bodies is serious due to the high-concentration nutrient salt, algae in water are propagated and grown in a large amount, the amount of the nutrient salt is increased rapidly, the balance and stability of aquatic ecosystems are seriously damaged, the water quality health and water landscape are greatly influenced, and the domestic water and drinking water safety of people is influenced. The main hazards are as follows: algae consume a large amount of dissolved oxygen in water, so that fishes in water are difficult to survive; the algal toxin released by algae can enter human bodies through the enrichment effect, thus being harmful to human health; the outbreak of algal blooms has a serious influence on the water purification project. The effective algal bloom treatment technology is still a worldwide problem, and a new technical means is urgently needed to be searched at present, so that the algal bloom can be effectively, massively and harmlessly removed, the water source area is protected, the local water landscape is improved, and a new means is provided for the emergency treatment of algal bloom outbreak.
For algae proliferated in a water body, sand filtration or manual salvage is mostly adopted to remove the algae in the prior art, but the method has the disadvantages of high energy consumption, high cost, easy blockage of a sand cylinder, frequent maintenance and narrow application range, so the method is only suitable for the treatment of the small-area algae-containing water body. Researches show that the algae removal rate of the enhanced dissolved air flotation device can reach more than 90 percent, but the enhanced dissolved air flotation device is widely applied to tap water supply engineering, is not suitable for removing algae in large-area water surfaces such as urban landscapes and the like, and has the problem of high energy consumption. At present, no effective pollution treatment method aiming at treating the landscape water body polluted by the urban algae is reported.
Disclosure of Invention
[ problem ] to
Aiming at the defects in the prior art, the invention aims to provide the method for treating the algae pollution of the landscape water body, which is suitable for emergency algae removal of closed slow-flow landscape water bodies such as urban rivers, lakes and the like taking blue-green algae as dominant algae species, has high algae removal efficiency and can avoid secondary outbreak of algae pollution.
Another object of the present invention is to provide a system for treating algae pollution in landscape water, which can operate in water seriously polluted by algae for a long time, and has an automatic operation function without manual operation.
[ solution ]
In order to achieve the above object, according to one embodiment of the present invention, there is provided a method for treating algae pollution in landscape water, comprising the steps of:
(1) arranging a plurality of detection points in the area of the water body to be treated, wherein the interval between adjacent detection points is 5-15 m,
(2) detecting the turbidity and chlorophyll a value of a detection point position, judging the pollution degree of the algae,
(3) when the algae pollution degree is above a preset value, algae removal treatment is carried out at the detection point,
(4) and (5) moving to another detection point position, and repeating the step (2) until the detection of all the detection point positions is completed.
In the present invention, the predetermined value of the degree of contamination of algae may be turbidity of 40NTU and/or chlorophyll a value of 200. mu.g/L.
The algae removal treatment comprises the following steps: adding an algaecide at the detection point, and stirring for 2-15 min at a stirring speed of 50-250 r/min.
Further, the algaecide comprises an algaecide A and an algaecide B, and the algae removal treatment comprises the following steps: adding an algaecide A at the detection point, stirring for 2-15 min at a stirring speed of 50-250 r/min to enable the concentration of the algaecide A at the detection point to be 20-60 mg/L, then adding an algaecide B, and stirring for 2-15 min at a stirring speed of 50-250 r/min to enable the concentration of the algaecide B at the detection point to be 20-60 mg/L.
The algaecide A comprises diatomite, calcium carbonate, sodium silicate and pullulan in a mass ratio of 10 (3-5): 0.7-0.9): 0.1-0.3, preferably 10:4:0.8: 0.2; the algaecide B comprises polyacrylamide and polyaluminium chloride (PAC) in a mass ratio of 1 (0.1-0.3), preferably 1: 0.2.
The method according to the invention further comprises the following steps after step (2): (3') when the degree of algal contamination is less than the predetermined value, performing the step (4).
After the algae removal treatment, the method of the present invention further comprises: and (5) returning to the step (2) again after the algae removal treatment is finished for 60 min.
According to another embodiment of the present invention, there is provided a landscape water body algae pollution treatment system, which includes: the device comprises a control unit, a detection unit, an algae removal unit and a carrier unit, wherein the control unit is used for arranging a plurality of detection points in a water body area to be treated, and the interval between every two adjacent detection points is 5-15 m; the detection unit is used for detecting the turbidity and the chlorophyll a value of a detection point position and judging the algae pollution degree through the control unit; the algae removal unit is used for controlling the algae removal processing at the detection point position by the control unit when the algae pollution degree is above a preset value; and the carrier unit is used for bearing the processing system and is controlled by the control unit to move.
Further, the algae removal unit comprises a throwing unit and a stirring unit, wherein the throwing unit is used for throwing the algae removal agent into the water body; and the stirring unit is used for stirring in the water body.
Further, the control unit is also used for controlling the carrier unit to move to another detection point when the algae pollution degree is smaller than a preset value.
Further, the control unit is also used for controlling the detection unit to detect again 60min after the algae removal unit finishes the algae removal treatment so as to judge the algae pollution degree.
[ advantageous effects ]
In conclusion, the invention has the following beneficial effects:
the invention relates to a landscape water body algae pollution treatment method, which comprises the steps of firstly carrying out subarea detection on a water body and then carrying out algae removal treatment in real time, so that the problems of excessive dosing times, inaccurate dosing position and the like of the traditional algae removal method are solved, the dosing cost can be saved to the maximum extent, and the algae removal efficiency can be effectively improved. The treatment method can be used for closing the urban large-scale landscape water body with slow flow, not only eliminates the influence of poor sense of mind caused by algae pollution of the landscape water body by naturally sinking the algae to the water bottom, but also reduces the turbidity of the water body, realizes the limpidity and transparency of the water body, has simple and convenient operation and safe use, saves resources and cost, and has no secondary pollution. In addition, the treatment method does not directly penetrate into the algae to kill algae cells, so that the detection of algae toxins and the detection of medicament toxicity both meet the national standard, and the detection toxicity is low, thereby meeting the green ecological concept.
The invention also relates to a treatment system of the treatment method, the treatment system can automatically operate in a water body seriously polluted by algae without manual operation and control, the dual functions of algae control and algae inhibition are realized, the emergency treatment efficiency of the algae can be improved, and the secondary outbreak of the algae pollution can be avoided.
Detailed Description
In order that those skilled in the art will more clearly understand the present invention, the following examples are given for further detailed description of the present invention, but it should be understood that the following examples are only preferred embodiments of the present invention, and the scope of the present invention as claimed should not be limited thereto.
The invention relates to a method and a system for treating algae pollution of landscape water, which are suitable for emergency algae removal of closed slow-flow water bodies (such as urban rivers, lakes, ponds, drainage channels and the like) in an algae bloom outbreak period. According to the invention, a treatment system is put into the closed slow-flow water body in the algal bloom outbreak period, and a reasonable water body moving route and detection points are set for the treatment system in advance, so that the treatment system can judge the algae pollution degree of an area through indexes such as turbidity, chlorophyll a and the like of the detection points of the water body, and if the water quality does not exceed the standard, the treatment system drives into the next detection point; if the water quality exceeds the standard, the area of the detection point is proved to be seriously polluted by algae, and the control unit starts the throwing unit and the stirring unit at the detection point to throw a specific amount of algaecide into the water body and control the stirring speed and time. In addition, after the algae removal treatment is finished, the water quality of the place can be detected again, and if the water purification index is not reached, the previous dosing and stirring steps are continuously repeated; and if the water body purification index is reached, automatically moving to the next water body detection point for detection. The invention realizes the clarity and transparency of the water body while finishing the algae removal, eliminates the influence of poor sense of mind by naturally settling algae cells to the water bottom, reduces the manual operation cost, has simple and convenient operation and safe use, saves resources and cost and has no secondary pollution.
Specifically, the treatment method for algae pollution in landscape water according to the invention can comprise the following steps:
(1) arranging a plurality of detection points in the area of the water body to be treated, wherein the interval between every two adjacent detection points is 5-15 m
The algae pollution detection method has the advantages that the reasonable partition sampling detection and treatment of the algae polluted water body area can be facilitated by arranging the detection points, the water body area to be treated is divided into different partitions taking the detection points as circle centers, the interval between the adjacent detection points is 5-15 m, namely the diameter range of each partition is 5-15 m, effective sampling detection can be achieved within the range, the algae pollution condition of each partition and the pollution distribution of the whole water body area to be treated are obtained, local algae removal treatment can be conveniently and pertinently carried out in time, and the blind putting of the algae removal agent is avoided.
The present invention is not limited to the above-mentioned setting mode, and may be, for example, even distribution in the water body area to be treated by satellite positioning, or setting according to the water body pollution distribution by actual visual observation, but the present invention is not limited to this.
(2) Detecting the turbidity and chlorophyll a value of a detection point position, and judging the pollution degree of the algae
Turbidity and chlorophyll a value are important indexes for reacting algae pollution in water. Algae generally contains a large amount of chlorophyll a, the amount of chlorophyll a is necessarily increased along with the proliferation and the spread of the algae in the water body, and in addition, the metabolism of the algae in the proliferation process can also discharge a large amount of metabolites, so that the turbidity of the water body is improved. Therefore, the degree of algae pollution in the water body can be effectively judged by detecting the two indexes.
(3) When the algae pollution degree is above a preset value, algae removal treatment is carried out at the detection point
When the algae pollution degree is above a preset value, namely the water quality exceeds the standard, indicating that the detection point area is seriously polluted by algae, corresponding algae removal treatment is required to purify the water quality. In the present invention, the predetermined value of the degree of contamination of algae may be turbidity of 40NTU and/or chlorophyll a value of 200 μ g/L, and above the predetermined value, it can be determined that the algae in the water body has spread and is needed to be removed.
In the present invention, the algae removal treatment comprises: adding an algaecide at the detection point, and stirring for 2-15 min at a stirring speed of 50-250 r/min so that the concentration of the algaecide is 20-60 mg/L. In the prior art, after the algaecide is added, an excessively high stirring speed is usually applied to facilitate the diffusion and effect of the algaecide, but in the invention, the excessively high stirring speed can interfere the combination of the algaecide with algae, so that the flocculation and sedimentation of a combined body are slowed down, and the algae removal effect is influenced; when the stirring speed is too low, the diffusion rate of the algaecide is correspondingly slowed down, so that the added algaecide cannot be fully diffused around the detection point, namely, the added algaecide and the algae are subjected to flocculation reaction and sedimentation, the effect range is narrowed, and part of unreacted algaecide is wrapped and sedimented to cause waste.
Further, the algaecide comprises an algaecide A and an algaecide B, the algaecide A comprises diatomite, calcium carbonate, sodium silicate and pullulan, the algaecide B comprises polyacrylamide and polyaluminium chloride, and the two components are added and stirred separately. In the invention, the algaecide A is firstly put in, wherein the pulullan can change the characters of the surfaces of the algae, which is beneficial to the adsorption of the diatomite and the calcium carbonate, and the sodium silicate further improves the combination of the diatomite and the calcium carbonate with the surfaces of the algae and promotes the anchoring of the diatomite and the calcium carbonate on the surfaces of the algae; then adding algaecide B, wherein polyacrylamide and polyaluminium chloride are mutually matched to play the flocculation effect of maximum effect, so that the algae combined with the diatomite and the calcium carbonate form a stable flocculating body with larger density and volume, thereby sinking into the water bottom to decay and digest and achieving the effect of removing the algae. Here, when the ratio of pullulan in the algicide A is low, the effect of changing the surface properties of the algae cannot be achieved, and when the ratio is high, the effect of sodium silicate in promoting the anchoring of the diatomite and the calcium carbonate on the surfaces of the algae is prevented; the lower the proportion of sodium silicate, the more difficult the efficacy of improving the bonding between the diatomaceous earth and calcium carbonate and the algae surface, while the higher the proportion, the more difficult the flocculation process. In addition, the algaecide comprises the components which are all environment-friendly, can not cause poison to other water organisms, and has higher safety.
In the invention, the concentrations of the algaecide A and the algaecide B after being added and stirred are both 20-60 mg/L, when the concentrations are lower than the concentration range, the algae in the water body cannot be fully flocculated to form a larger flocculating constituent, and when the concentrations are higher than the concentration range, the flocculation rate is too high, and a lot of air is possibly mixed in the flocculating constituent, so that the flocculating constituent is difficult to settle.
In the present invention, the result of the detection of the degree of contamination by algae can be collected and judged on site or remotely, and can be performed manually or by computer. Preferably, the detection result can be sent to the control unit through the network, the detection result is compared with a preset value, once the point exceeds the standard, the alarm device gives an alarm, the control unit starts the throwing unit to throw the algaecide and the stirring unit to stir according to the pollution degree of the point, and the dosage and the stirring time are set.
In addition, the method returns to the step (2) again after the algae removal treatment is finished for 60min, namely the algae removal effect is checked again after the algae removal treatment, and if the pollution degree of the algae is still above the preset value, the algae removal treatment is carried out again until the turbidity and the chlorophyll a value are lower than the preset value. For the common algae pollution degree, the invention can realize water quality purification through one-time algae removal treatment, and for the water body with serious algae pollution, for example, when the turbidity is more than 80NTU and/or the chlorophyll a value is more than 600 mug/L, the effect can not be achieved by one-time algae removal treatment, therefore, the final removal can be realized through multiple times of algae removal treatment and subsequent detection of the algae removal effect, compared with the algae removal effect by one-time input of huge amount of algae removal agent, the invention has better algae removal effect, and saves more algae removal agent.
(4) Moving to another detection point position and repeating the step (2) until the detection of all the detection point positions is finished
When the water quality of one detection point is smaller than a preset value after being treated, the aim of removing algae and purifying the water quality is achieved, so that the detection device can be moved to another detection point to detect turbidity and a chlorophyll value; or when the original water quality algae pollution degree of one detection point is smaller than the preset value, the water quality at the detection point is not out of standard, and the water quality at the other point is detected without algae removal.
The treatment system for the algae pollution of the landscape water body comprises a control unit, a detection unit, an algae removal unit and a carrier unit.
Control unit
The control unit is a center of the treatment system and can be used for arranging a plurality of detection points in a water body area to be treated, the interval between every two adjacent detection points is 5-15 m, in addition, the algae pollution degree at one detection point can be judged after the detection unit detects the turbidity and the chlorophyll a value of the detection point, different operations are carried out according to results, namely when the algae pollution degree is above a preset value, the algae removal unit is controlled to carry out algae removal treatment, the detection unit is controlled to carry out detection and rechecking on the water body again after the algae removal treatment is finished, whether the algae removal treatment needs to be carried out again is determined, when the algae pollution degree is less than the preset value, the water body is not treated, and the carrier unit is controlled to move to the other detection point to repeat the operations.
In addition, the control unit may be disposed locally, or may implement a control function remotely through a radio signal, and the present invention is not particularly limited.
Detection unit
The detection unit is used for detecting the turbidity and the chlorophyll a value of the current detection point position and sending the result to the control unit. In the present invention, the specific structure of the detection unit may not be particularly limited as long as the turbidity and chlorophyll-a value of the water body can be accurately measured. For example, a water inlet pipe, an overflow pipe, a drain pipe, a water tank, a water quality detection sensor and other devices can be arranged, a water sample in the water body to be detected is extracted by the water inlet pipe and sent into the connected water tank, the amount of the water sample in the water tank is controlled by the overflow pipe, the water quality detection sensor is fixedly arranged outside the water tank, a detection probe is inserted below the liquid level of the water sample in the water tank for detection, and after the detection is finished, the water sample is drained out of the water tank by the drain pipe, so that the determination of turbidity and chlorophyll a value of a detection point is finished.
In addition, the water quality detection sensor can also simultaneously measure other water quality parameters of the water body at the detection point, such as temperature, dissolved oxygen and the like, so as to comprehensively monitor the water quality condition of the water body.
Algae removal unit
The algae removal unit is used for performing algae removal treatment when the algae pollution degree is above a preset value, and comprises a feeding unit and a stirring unit. The device comprises a throwing unit, a stirring unit and a control unit, wherein the throwing unit is used for throwing specific amounts of algaecide A and algaecide B into the water body, and the stirring unit is used for stirring in the water body at a specific stirring speed and time. All the above functions can be accurately performed under the control of the control unit.
Carrier unit
The carrier unit is used for bearing the processing system, namely the detection unit, the algae removal unit and the carrier unit, and can also bear the control unit when needed. In addition, the carrier unit is also provided with a power system, and a mobile processing system can be controlled by the control unit. In the present invention, the specific structure of the carrier unit is not particularly limited, and it only needs to float on the water surface and move controllably, for example, it can be carried by a ship, a raft, a sampan, a barrel of a shutter, etc., preferably a ship, but the present invention is obviously not limited thereto.
< example >
The invention will be described in detail below by way of examples.
Sources of materials
Diatomaceous earth, available from Qingdao Samsung diatomaceous earth, Inc.,
calcium carbonate, available from Guangzhou Changyue chemical Co., Ltd,
sodium silicate, available from suzhou yi heng fine chemicals ltd,
pullulan, available from Folaide Biotech, Suzhou,
polyacrylamide, purchased from the water purification material factory of Zhengyi city,
polyaluminum chloride available from brook materials, Inc. of Henan blue.
Example 1
The algae pollution treatment is carried out in the area A of the Weijinghe in Tianjin. Driving a processing ship (carrier unit) carrying a processing system into the area, arranging three detection points in the area, wherein the distance between the detection points is 10 meters, firstly, carrying out water quality detection on the first detection point by a detection unit, measuring that the chlorophyll a value is 272.7 mug/L and the turbidity is 46.7NTU, judging that the water quality exceeds the standard by a control unit, immediately starting an algae removal unit, adding an algae removal agent A (comprising diatomite, calcium carbonate, sodium silicate and pullulan with the mass ratio of 10:4:0.8: 0.2), synchronously stirring at the speed of 150r/min for 5min, so that the concentration of the algaecide A at the detection point is 20mg/L, then adding the algaecide B (which comprises polyacrylamide and polyaluminum chloride in a mass ratio of 1: 0.2) and synchronously stirring at the speed of 50r/min for 10min so that the concentration of the algaecide B at the detection point is 20 mg/L. After 60min, the detection unit was started again and chlorophyll a was measured to be 53.8 μ g/L, removal 80.3%, and turbidity 8.1NTU, removal 82.7%. At the moment, the control unit judges that the water quality reaches the standard, the algae removal at the first detection point is finished in a subarea mode, the control unit controls the processing ship to drive to the second detection point, the measured chlorophyll a value is 40.9 mug/L, the turbidity is 10.1NTU, the water quality does not exceed the standard, the control unit controls the processing ship to drive to the third detection point, the measured chlorophyll a value is 53.9 mug/L, the turbidity is 16.5NTU, and the water quality still does not exceed the standard, so that the detection and the processing of all the detection points are finished, and one water body algae pollution processing period is finished.
Example 2
And (4) carrying out algae pollution treatment on the water body in the area B of the Weijinhe in Tianjin. Driving a processing ship (carrier unit) carrying a processing system into the area, arranging three detection points in the area, wherein the distance between the detection points is 5 meters, firstly, carrying out water quality detection on the first detection point by the detection unit, measuring that the chlorophyll a value is 110.9 mug/L and the turbidity is 23.5NTU, judging that the water quality reaches the standard by the control unit, controlling the processing ship to drive to the second detection point, measuring that the chlorophyll a value is 418.3 mug/L and the turbidity is 67.4NTU, judging that the water quality exceeds the standard by the control unit, immediately starting the algae removal unit, adding an algae removal agent A (comprising diatomite, calcium carbonate, sodium silicate and pullulan with the mass ratio of 10:4:0.8: 0.2) and synchronously stirring at the speed of 50r/min for 15min so that the concentration of the algae removal agent A at the detection point is 50mg/L, then adding an algae removal agent B (comprising polyacrylamide and polyaluminium chloride with the mass ratio of 1: 0.2) and synchronously stirring at the speed of 100r/min for 10min, so that the concentration of algaecide B at the detection site was 50 mg/L. After 60min, the detection unit was started again, and chlorophyll a value of 55.9 μ g/L, removal rate of 86.6%, turbidity of 6.5NTU, and removal rate of 90.4% were measured. At the moment, the algae removal of the second detection point is finished in a subarea mode, the control unit controls the processing ship to drive to the third detection point, the measured chlorophyll a value is 88.2 mug/L, the turbidity is 21.4NTU, the water quality does not exceed the standard, the detection and the processing of all the detection points are finished, and the algae pollution processing of the water body in the area is finished.
Example 3
The algae pollution treatment of the water body is carried out in the A area of a certain lake of Tianjin university. Driving a processing ship (carrier unit) carrying a processing system into the area, arranging two detection points in the area, wherein the distance between the two detection points is 12 meters, firstly, carrying out water quality detection on a first detection point by the detection unit, measuring that the chlorophyll a value is 112.7 mug/L and the turbidity is 22.1NTU, judging that the water quality does not exceed the standard by the control unit, controlling the processing ship to drive to a second detection point, measuring that the chlorophyll a value is 302.5 mug/L and the turbidity is 38.8NTU, judging that the water quality exceeds the standard by the control unit, immediately starting an algae removal unit, adding an algae removal agent A (comprising diatomite, calcium carbonate, sodium silicate and pullulan with the mass ratio of 10:3:0.9: 0.1) and synchronously stirring for 2min at the speed of 250r/min so that the concentration of the algae removal agent A at the detection point is 30mg/L, then adding an algae removal agent B (comprising polyacrylamide and polyaluminium chloride with the mass ratio of 1: 0.3) and synchronously stirring for 12min at the speed of 100r/min, so that the concentration of algaecide B at the detection site was 25 mg/L. After 60min, the detection unit was started again and chlorophyll a was measured to be 42.7 μ g/L, removal 85.9%, and turbidity 4.4NTU, removal 88.7%. At the moment, the control unit judges that the water quality reaches the standard, so that the detection and the treatment of all detection points are completed, and the treatment of the algae pollution of the water body in the area is completed.
Example 4
The algae pollution treatment is carried out on a certain lake B area in Tianjin city. Driving a processing ship (carrier unit) carrying a processing system into the area, arranging three detection points in the area, wherein the distance between the detection points is 15 meters, firstly, carrying out water quality detection on the first detection point by the detection unit, detecting that the chlorophyll a value is 156.2 mug/L and the turbidity is 34.6NTU, controlling the processing ship to drive to the second detection point, detecting that the chlorophyll a value is 124.8 mug/L and the turbidity is 27.3NTU, controlling the processing ship to drive to the third detection point, detecting that the chlorophyll a value is 467.9 mug/L and the turbidity is 61.1NTU, determining that the water quality is over-standard by the control unit, immediately starting the algae removal unit, adding algae removal agent A (which comprises kieselguhr, calcium carbonate, sodium silicate and pullulan with the mass ratio of 10:5:0.7: 0.3) and synchronously stirring for 15min at the speed of 150r/min, so that the concentration of the algaecide A at the detection point is 60mg/L, then adding the algaecide B (which comprises polyacrylamide and polyaluminum chloride in a mass ratio of 1: 0.1) and synchronously stirring at the speed of 200r/min for 13min so that the concentration of the algaecide B at the detection point is 60 mg/L. After 60min, the detection unit is started again, and the chlorophyll a value is measured to be 56.1 mug/L, the removal rate is 88.0 percent, the turbidity is 7.8NTU, and the removal rate reaches 87.2 percent. At the moment, the control unit judges that the water quality reaches the standard, the third detection point is subjected to algae removal in a subarea mode, so that detection and treatment of all detection points are completed, and water body algae pollution treatment in the area is completed.
Comparative example 1
And carrying out algae pollution treatment on the water body in the area A of the Jinhe in Tianjin. The method comprises the steps of driving a treatment ship (carrier unit) with a treatment system into the area, arranging a detection point in the area, detecting water quality by the detection unit, detecting that a chlorophyll value is 243.7 mug/L and turbidity is 38.2NTU, judging that the water quality exceeds the standard by the control unit, immediately starting the algae removal unit, adding an algaecide A (comprising diatomite, calcium carbonate, sodium silicate and pullulan in a mass ratio of 10:4:0.8: 0.2) and synchronously stirring at a speed of 300r/min for 4min so that the concentration of the algaecide A at the detection point is 20mg/L, then adding an algaecide B (comprising polyacrylamide and polyaluminium chloride in a mass ratio of 1: 0.2) and synchronously stirring at a speed of 300r/min for 4min so that the concentration of the algaecide B at the detection point is 20 mg/L. After 60min, the detection unit was started again and chlorophyll a was found to have a value of 98.2. mu.g/L, a removal rate of 59.7%, and a turbidity of 17.3NTU, a removal rate of 54.7%. At the moment, the control unit judges that the water quality reaches the standard, the algae pollution treatment of the water body in the area is finished, but the algae removal efficiency is obviously reduced by adopting the stirring speed outside the range of the invention.
Comparative example 2
And carrying out algae pollution treatment on the water body in the area B of the Jinhe in Tianjin. The method comprises the steps of driving a treatment ship (carrier unit) with a treatment system into the area, arranging a detection point in the area, detecting water quality by the detection unit, detecting that the chlorophyll a value is 263.5 mug/L and the turbidity is 52.7NTU, judging that the water quality exceeds the standard by the control unit, immediately starting the algae removal unit, adding an algaecide A (comprising kieselguhr, calcium carbonate, sodium silicate and pullulan in a mass ratio of 10:2:1.0: 0.05) into the algae removal unit, synchronously stirring the mixture at a speed of 150r/min for 10min to enable the concentration of the algaecide A at the detection point to be 20mg/L, then adding an algaecide B (comprising polyacrylamide and polyaluminium chloride in a mass ratio of 1: 0.1) into the algae removal unit, and synchronously stirring the mixture at a speed of 50r/min for 10min to enable the concentration of the algaecide B at the detection point to be 20 mg/L. After 60min, the detection unit is started again, and the chlorophyll a value is measured to be 134.8 mug/L, the removal rate is 48.8 percent, the turbidity is 23.5NTU, and the removal rate reaches 55.4 percent. At the moment, the control unit judges that the water quality reaches the standard, the algae pollution treatment of the water body in the area is finished, but the algae removal efficiency is obviously reduced by adopting the algaecide component proportion outside the range of the invention.
Comparative example 3
And carrying out algae pollution treatment on the water body in the Jinhe C area in Tianjin. Driving a treatment ship (carrier unit) carrying a treatment system into the area, arranging a detection point in the area, detecting water quality by the detection unit, detecting that the chlorophyll a value is 387.8 mug/L and the turbidity is 64.1NTU, judging that the water quality exceeds the standard by the control unit, immediately starting the algae removal unit, adding an algaecide A (comprising diatomite, calcium carbonate, sodium silicate and pullulan in a mass ratio of 10:6:0.6: 0.4) and synchronously stirring at a speed of 250r/min for 8min so that the concentration of the algaecide A at the detection point is 60mg/L, then adding an algaecide B (comprising polyacrylamide and polyaluminium chloride in a mass ratio of 1: 0.05) and synchronously stirring at a speed of 200r/min for 12min so that the concentration of the algaecide B at the detection point is 60 mg/L. After 60min, the detection unit is started again, and the chlorophyll a value is measured to be 214.1 mug/L, the removal rate is 44.8 percent, the turbidity is measured to be 44.7NTU, and the removal rate reaches 30.3 percent. At the moment, the control unit judges that the water quality exceeds the standard, and the water body in the area still needs to be subjected to algae pollution treatment again, so that the water quality purification cannot be realized once under the condition that the algae pollution degree is not high by adopting the algaecide component proportion outside the range of the invention, and the algae removal efficiency is obviously reduced.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The method for treating the algae pollution of the landscape water body is characterized by comprising the following steps:
(1) arranging a plurality of detection points in the area of the water body to be treated, wherein the interval between adjacent detection points is 5-15 m,
(2) detecting the turbidity and chlorophyll a value of a detection point position, judging the pollution degree of the algae,
(3) when the algae pollution degree is above a preset value, algae removal treatment is carried out at the detection point,
(4) and (5) moving to another detection point position, and repeating the step (2) until the detection of all the detection point positions is completed.
2. The method of claim 1, wherein the predetermined value of the degree of algae contamination is a turbidity of 40NTU and/or a chlorophyll a value of 200 μ g/L.
3. The method for treating the algae pollution in the landscape water body according to claim 1, wherein the algae removal treatment comprises: adding an algaecide at the detection point, and stirring for 2-15 min at a stirring speed of 50-250 r/min.
4. The method for treating the algae pollution in the landscape water body according to claim 3, wherein the algaecide comprises an algaecide A and an algaecide B, and the algae removal treatment comprises the following steps: adding an algaecide A at the detection point, stirring for 2-15 min at a stirring speed of 50-250 r/min to enable the concentration of the algaecide A at the detection point to be 20-60 mg/L, then adding an algaecide B, stirring for 2-15 min at a stirring speed of 50-250 r/min to enable the concentration of the algaecide B at the detection point to be 20-60 mg/L,
the algaecide A comprises diatomite, calcium carbonate, sodium silicate and pullulan in a mass ratio of 10 (3-5): (0.7-0.9): 0.1-0.3); the algaecide B comprises polyacrylamide and polyaluminium chloride in a mass ratio of 1 (0.1-0.3).
5. The method for treating algae pollution in landscape water according to claim 1, wherein the method further comprises the following steps after the step (2):
(3') when the degree of algal contamination is less than the predetermined value, performing the step (4).
6. The method of claim 1, wherein after the algae removal treatment, the method further comprises: and (5) returning to the step (2) again after the algae removal treatment is finished for 60 min.
7. A landscape water body algae pollution treatment system is characterized in that the treatment system comprises: the device comprises a control unit, a detection unit, an algae removal unit and a carrier unit, wherein the control unit is used for arranging a plurality of detection points in a water body area to be treated, and the interval between every two adjacent detection points is 5-15 m; the detection unit is used for detecting the turbidity and the chlorophyll a value of a detection point position and judging the algae pollution degree through the control unit; the algae removal unit is used for controlling the algae removal processing at the detection point position by the control unit when the algae pollution degree is above a preset value; and the carrier unit is used for bearing the processing system and is controlled by the control unit to move.
8. The system of claim 7, wherein the algae removal unit comprises a throwing unit and a stirring unit, wherein the throwing unit is used for throwing an algaecide into the water body; and the stirring unit is used for stirring in the water body.
9. The system of claim 7, wherein the control unit is further configured to control the carrier unit to move to another detection point when the degree of algae pollution is less than a predetermined value.
10. The system of claim 7, wherein the control unit is further configured to control the detection unit to perform detection again 60min after the algae removal unit completes the algae removal process, so as to determine the degree of algae contamination.
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