CN101532284A - Method for removing dormancy stage of blue algae and equipment thereof - Google Patents
Method for removing dormancy stage of blue algae and equipment thereof Download PDFInfo
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- CN101532284A CN101532284A CN200810244179A CN200810244179A CN101532284A CN 101532284 A CN101532284 A CN 101532284A CN 200810244179 A CN200810244179 A CN 200810244179A CN 200810244179 A CN200810244179 A CN 200810244179A CN 101532284 A CN101532284 A CN 101532284A
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Abstract
The invention provides a method for removing a dormancy stage of blue algae and equipment thereof. The method comprises the following steps: (1) absorbing the blue algae body in dormancy stage, dead algae body, partial clay mineral and water which are on the water-sludge interface onto a boat by a pump barrel through a suction nozzle in the dormancy stage of blue algae; (2) sufficiently separating the absorbed blue algae body in dormancy stage, dead algae body, partial clay mineral and water; and (3) returning the separated clay mineral and water to a lake body. The equipment for removing the dormancy stage of the blue algae used by the method is characterized by having the structure as follows: an inlet of a sludge pump is connected with a hose and the suction nozzle; an outlet of the sludge pump is connected with a filter; and an outlet of the filter is connected with a drainage port. The method and the equipment have the advantages that as algae outbreak has certain timeliness and stage, in the stage of algae non-outbreak, the algae are often enriched on the surface of sediment, mass outbreak of the algae can be effectively prevented through killing and blocking the algae body in the stage.
Description
Technical field
The present invention relates to the rest period removal method of a kind of blue-green algae, the present invention also will provide this method employed equipment.
Background technology
In the various pollution problems of lake aquatic attitude environment, body eutrophication (Eutrophication) is that one of the most general, that harm is maximum outstanding problem takes place, influence and restricting the coordinated development of economic society, become one of the most serious main Environmental Problems that the world today faces, and more and more caused people's great attention.The pollutant holding capability of water body is big more, and pollutant sharply accumulates in water body and the bed mud, and nutrient concentration is more and more higher, and lake eutrophication is on the rise.And the direct result of lake eutrophication is the excessive multiplication of algae and then causes the degree of algae pollution also to be on the rise.
People such as Gordon find in the research of nineteen eighty-two: utilize algae (phytoplankton) to remove that nutritive salt is very effective in the water, it is one of effective method in the existing sewerage treatment.As if the natural conditions of Dian Chi are more suitable for the growth of blue-green algae, as long as weather, nutrition and HYDRODYNAMIC CONDITION RELATING TO are appropriate, full acid blue algae broke out at Quan Hu continually in nearly ten years; And unlike the artificial reparation of aquatic macrophyte, drop into huge, removal effect is very little and be unable to undergo long check.The enforcement period of the ninth five-year plan, once carried out the artificial reinstatement works research of aquatic macrophyte in the Yunnan Province, the trial zone can normally move under artificial controlled condition, but the trial zone blue-green algae still breaks out after being back to nature, and aquatic macrophyte suffers very big destruction; In more waters, Dian Chi, exist the phenomenon of algae grass symbiosis also to prove that pasture and water are very little to lake water nitrogen phosphorus removal effect in the side." Dian Chi blue-green alga bloom pollution control technology research " important function for of research achievement of the Ministry of Science and Technology and Government of Yunnan Province project verification in 2000, expert's evaluation have by inspection also been affirmed fully " biological control algae " and " machinery removes algae " technology is effective.But these algal control measures of having studied and having demonstrated are all carried out when breakout of water bloom, because the speed of algae reproduction is exceedingly fast, the workload of removing algae is very big, makes the speed that does not catch up with algae reproduction except that the speed of algae, does not reach the purpose of effective control blue-green alga bloom.Project application unit finds in previous research work, in the gap phase of blue-green alge breakout of water bloom, the most survivals of the frond of living are near the water and soil interface, owing to not carrying out photosynthesis, so algae at this moment can not effectively breed (rest period that we are referred to as algae).In case environment suitable (temperature, illumination, nutrition condition etc.), frond just climbs up on top of the water and breeds fast like this, and wawter bloom just takes place.
At present, the solution of relevant issues has also become the task of top priority, also is to prevent that the lake environment quality from continuing the research focus that worsens and thoroughly deal with problems.
Summary of the invention
The rest period removal method that the purpose of this invention is to provide a kind of blue-green algae, and the employed equipment of this method.The purpose of this rest period blue-green algae removal know-why research and application apparatus development is: adopt more economical investment cost and running cost, can more effectively gather in the crops the blue-green algae biomass of greater number, thereby play and reduce the Dian Chi blue-green algae year by year and break out quantity and scope, obviously improve northern waters blue-green algae and pile up situation, the nutrient concentration that makes endogenous nitrogen phosphorus discharge pollution intensity and Dian Chi water body obtains more significant decline, really plays the effect that Dian Chi water pollutes " control source control algae " and " external control drags for algae in the source ".
The scheme of finishing the foregoing invention task is, the rest period removal method of a kind of blue-green algae is characterized in that step is as follows,
(1). in the rest period of blue-green algae, adopt pump barrel will be in water-mud rest period blue-green algae frond, dead frond, partial clay mineral and water at the interface and be drawn on the ship together by suction nozzle;
(2). the rest period blue-green algae frond that is drawn to, dead frond, partial clay mineral are fully separated with water;
(3). isolated clay mineral and water are returned the lake body.
" partial clay mineral and the water " of the above absorption can't be avoided when drawing operation and draw, and the quantity of being somebody's turn to do " partial clay mineral and water " in the operation is few more good more.So in prioritization scheme, the absorption step of described " pump barrel passes through suction nozzle ", described suction nozzle operating area is arranged in the distance of the sedimental upper and lower 1cm in surface.
The employed equipment of above method is that the rest period of a kind of blue-green algae is removed equipment, it is characterized in that structure is as follows: be connected with flexible pipe and suction nozzle on the inlet of sludge pump; This mud delivery side of pump is connected with strainer; The outlet of strainer connects sewage draining exit.
Prioritization scheme has:
1, described suction nozzle adopts the garden shape structure of porous;
2, around the one side of described suction nozzle contact deposition, be provided with the safe edge of annular;
3, the pore size filter of described strainer adopts the screen material in 80～120 order apertures.
The invention key of method and apparatus of the present invention is:
The first, suction nozzle will guarantee the sedimental surface of its permanent set and not get deeply stuck in into its deep of people, draws certain thickness deposit.Suction nozzle intend to adopt the garden shape structure of porous, around the one side of contact deposition, designs the safe edge of an annular, can not get deeply stuck in in the deposit to guarantee suction nozzle, and its safe edge material therefor, parameters such as thickness obtain by actual experiment.The second, movable pump barrel, because the variation of the depth of water is fixed on deposit surface in order to guarantee suction nozzle, the pump barrel part must be designed to the form that can rotate up and down, rough plan adopts the material of polyvinyl chloride that can be crooked to make.The 3rd, filter, the mixture of deposit, water and frond that absorption comes up must filter, and with assurance the clay mineral in the deposit is fully separated with frond (containing dead frond) with water, and clay mineral and water return the lake body.The size of the pore size filter of the key technology of filter, experiment are found, utilize the screen material in 80-120 order aperture, can reach effect preferably.
Because algae breaks out regular hour property and stage is arranged, break out the stage in that algae is non-, frond often is enriched in sedimental surface, in this stage frond is killed and is blocked, and can very effectively prevent breaking out in a large number of algae.
Technique effect of the present invention has following evidence:
2003, the inventor has tentatively carried out the experiment that removes the algae previous work of blue-green algae rest period, the test block is chosen in plum village, Chenggong (fish pond on the limit, Dian Chi) and carries out, in order to remove algae to the influence that water bloom of water body breaks out in blue-green algae rest period, arranged two kinds of processing: frond that (1) directly suspends the deposit top layer is removed; (2) cover certain thickness clay mineral in deposit surface.Carried out an algae then and broken out the observation experiment of phase, found that the experiment of the frond that direct elimination top layer suspends, during algae broke out, the content of its chlorophyll A only was 1/20～1/50 of control group; Show that also the content of chlorophyll A reduces (see figure 1) greatly and cover result of experiment.This shows that these experiments have fully proved the reliability of the imagination of removing algae of blue-green algae of the present invention rest period.
The theory significance and the realistic meaning of carrying out the research of this work are: research rest period blue-green algae removal technology can further promote the blue-green algae physiological property, break out the research that rule, control principle and eutrophic lake are repaired principle, helps progress of science and technology; Be both, rest period blue-green algae removal technology be blue-green algae break out phase blue-green alga bloom " machinery remove algae " technology important supplement with perfect, these all have value academic and theory.The achievement that this research obtains will be deepened people give birth to the rule that disappears to blue-green algae understanding, " manually removing algae " The Application of Technology of water-mud boundary layer, can prolong the receipts algae time of Dian Chi, obtain the blue-green algae biomass of maximum quantity, and can more effectively destroy the primary productivity of blue-green algae, finally reach the purpose of cutting down nutritive salt such as Dian Chi nitrogen phosphorus, this is to shortening the Dian Chi water pollution control time, obviously reducing blue-green alga bloom and break out with packing phenomenon important practical sense is arranged.
If, frond is separated in algae rest period, so just can suppress the scale that wawter bloom takes place, reach the effect of getting twice the result with half the effort.Simultaneously, nutrient concentrations such as the nitrogen phosphorus of air-dry algae are far above aquatic macrophyte, water-mud interface has residual body of more blue-green algae and sporinite to exist in blue-green algae rest period, also exist with great number of organic matters, these features not only help algae-mud dehydration and carry out recycling, and help using the economic benefit of obtaining to remedy the economy expenditure of " removing algae " process, the mode that might obtain meagre profit guarantees the normal operation after the industrialization, makes " removing algae " develop the possibility that becomes as the application technology of removing the nutritive salt in the water body.Thus, from science innovation and technological progress, it also is very necessary that the application's project is set up the project.
Description of drawings
The chlorophyll A content comparison diagram of Fig. 1 different disposal;
Fig. 2 water-deposit interface blue-green algae removal device schematic diagram;
Fig. 3 tests chlorophyll a concentration curve figure in the water body.
The specific embodiment
The Dian Chi has been a kind of lake that is subjected to serious eutrophication pollution.At present because of various reasons, go into nutritive salt such as lake organic pollution and nitrogen phosphorus go into the lake total amount still several times be higher than the environment capacity in lake self, especially new Kunming construction plan makes Dian Chi water pollution face bigger pressure, can predict in one quite long period, Dian Chi blue-green algae control still is a great difficult problem that merits attention in the environment scientific research, needs to continue to drop into, organize national science and technology strength to carry out the emphasis innovation research.Although administered the eutrophication of Dian Chi, be a complicated system engineering, cut off nitrogen phosphorus to go into the source, lake be the problem of most critical.But in that lake water nitrogen phosphorus level is high at present, under the situation that blue-green alga bloom still frequently breaks out, reducing the quantity of algae in the water body, also is a kind of effective measures of cutting down nutritive salt such as lake water nitrogen phosphorus.This shows, from the situation of Dian Chi eutrophication pollution, the economic development that faced the pressure of environment and the social demand of blue-green alga bloom control are considered, is necessary to originally approving and initiate a project.
Utilize the method that nutritive salt compares with water plant in the algae removal lake water that bigger superiority is arranged.Although aquatic macrophyte also can be used for the purpose of purifying waste water, in the lake that wide bank district is arranged, concentrate plantation harvesting aquatic macrophyte can remove lake week nutritive salt very effectively, yet the results that the aquatic macrophyte of root is arranged, may be very little to the water quality effect that changes eutrophication water, because the needed most of nutritive salt of these plants is from sapropel, rather than absorbs from water body.Body after the untimely harvesting of these aquatic macrophytes, plant death, as not removing from water as early as possible, their decomposition will resemble " pump " of a nutritive salt, discharges to come back in the water body from bed mud.Even aquatic macrophyte is all gathered in the crops, the very big difficulty of recycling existence that so many plant residue can be made a profit and be moistened, this problem solves bad, with the secondary pollution that causes water body in lake.In sum, it is feasible adopting " removing algae " technical scheme at blue-green algae rest period water-mud interface, also is the effective ways of nutritive salt in a kind of removal water of the best, is worth further investigation also to carry on technical development.
(1) rest period the blue-green algae removal device development
This is the key point of this project, intends adopting pump formula device (as shown in Figure 2), and this device is fixed on the sampling boat 1, the part that emphasis need be researched and developed has three: first, suction nozzle 7 will guarantee the sedimental surface of its permanent set and not get deeply stuck in into its deep of people, draws certain thickness deposit.Suction nozzle 7 adopts the garden shape structure of porous, around the one side of contact deposition, designs the safe edge of an annular, can not get deeply stuck in in the deposit to guarantee suction nozzle 7.The second, movable pump barrel 1, because the variation of the depth of water is fixed on deposit surface in order to guarantee suction nozzle, pump barrel 2 parts must be designed to the form that can rotate up and down, present embodiment is to adopt the material of polyvinyl chloride that can be crooked to make.The 3rd, filter 3 (strainer), the mixture of deposit, water and frond that absorption comes up must filter by strainer, with assurance the clay mineral in the deposit is fully separated with frond (containing dead frond) with water, clay mineral and water return the lake body.The size of the pore size filter of the key technology of filter, experiment are found, utilize the screen material in 80～120 order apertures, can reach effect preferably.5 is engine among the figure; 6 is deposit.4 is the delivery port of pump barrel 2.
(3) rest period the blue-green algae removal device practical operation and validity check
Select typical zone as experiment target area (rough plan is at the test block or the Haigeng arm of lake of Inst. of Hydrobiology, Chinese Academy of Sciences) in the Dian Chi, the target area is divided into 6 parts (every part 100m
2), carry out 2 kinds of processing, each handles 3 repetitions: contrast, the algae that removes of this device is tested.Regularly measure the variation (characterizing) of the water body blue-green algae quantity of different disposal with chlorophyll a.The result shows that fully testing except that algae of this device can fully suppress breaking out of blue-green alge.
Claims (6)
1, the rest period removal method of a kind of blue-green algae is characterized in that, step is as follows,
(1). in the rest period of blue-green algae, adopt pump barrel will be in water-mud rest period blue-green algae frond, dead frond, partial clay mineral and water at the interface and be drawn on the ship together by suction nozzle;
(2). the rest period blue-green algae frond that is drawn to, dead frond, partial clay mineral are fully separated with water;
(3). isolated clay mineral and water are returned the lake body.
2, the rest period removal method of blue-green algae according to claim 1 is characterized in that, described suction nozzle operating area is arranged in the distance of the sedimental upper and lower 1cm in surface.
3, the rest period of the employed blue-green algae of rest period removal method of the described blue-green algae of a kind of claim 1 is removed equipment, it is characterized in that structure is as follows: be connected with flexible pipe and suction nozzle on the inlet of sludge pump; This mud delivery side of pump is connected with strainer; The outlet of strainer connects sewage draining exit.
4, the rest period of blue-green algae according to claim 3 is removed equipment, it is characterized in that, described suction nozzle adopts the garden shape structure of porous.
5, the rest period of blue-green algae according to claim 3 is removed equipment, it is characterized in that, around the one side of described suction nozzle contact deposition, is provided with the safe edge of annular.
6, remove equipment according to the rest period of claim 3 or 4 or 5 described blue-green algaes, it is characterized in that the pore size filter of described strainer adopts the screen material in 80～120 order apertures.
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| CN200810244179A CN101532284A (en) | 2008-12-18 | 2008-12-18 | Method for removing dormancy stage of blue algae and equipment thereof |
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| CN200810244179A CN101532284A (en) | 2008-12-18 | 2008-12-18 | Method for removing dormancy stage of blue algae and equipment thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668967A (en) * | 2016-04-06 | 2016-06-15 | 环境保护部南京环境科学研究所 | System and method for removing overwintering blue algae in lake sediment in different position |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668967A (en) * | 2016-04-06 | 2016-06-15 | 环境保护部南京环境科学研究所 | System and method for removing overwintering blue algae in lake sediment in different position |
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Open date: 20090916 |