CN104591360A - Algicide and algae removing method capable of flocculating and quickly settling algae - Google Patents
Algicide and algae removing method capable of flocculating and quickly settling algae Download PDFInfo
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- CN104591360A CN104591360A CN201510025863.9A CN201510025863A CN104591360A CN 104591360 A CN104591360 A CN 104591360A CN 201510025863 A CN201510025863 A CN 201510025863A CN 104591360 A CN104591360 A CN 104591360A
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Abstract
The invention relates to an algicide and an algae removing method using the algicide. The algicide capable of flocculating and quickly settling algae comprises 3.75-30 parts of chitosan and 200-1000 parts of 80-160-mesh coal ash steam-pressing brick powder. A preparation method of the algicide comprises the following steps: dissolving the chitosan by using 1-5 volume parts of HCl solution with the concentration of 0.4-2 percent; adding the coal ash steam-pressing brick powder to prepare the algicide. The algae removing method capable of flocculating and quickly settling algae comprises the following steps: firstly, putting a certain amount of potassium permanganate into an algae-polluted water body to perform pre-oxidization for 0-50 minutes; dissolving chitosan with diluted hydrochloric acid and adding the coal ash steam-pressing brick powder to prepare the algicide; then putting a certain amount of algicide into the algae-polluted water body, and keeping stand to ensure that the algae are flocculated and then settled to the bottom of the water. According to the algicide and the algae removing method capable of flocculating and quickly settling the algae, the algicide is safe and reliable to use, and the algae are completely and quickly removed; the using amount of the algicide is less and the stirring is not needed; the algae bloom can be securely and effectively controlled, and the cleanliness of the water level can be kept.
Description
Technical field
The invention belongs to field of environment protection, be specifically related to a kind of frond that makes and flocculate and the safe algicide of rapid subsidence, and apply the method that this algicide carries out except algae.
Background technology
Current air ambient/water surrounding is all heavily polluted.Partial area blue-green alga bloom frequently breaks out, and not only can cause that water body DO sharply declines, water quality is corrupt, and frustule decline or the Microcystin discharged that breaks also constitute serious threat to HUMAN HEALTH.Therefore, control and the algae of removing in water body are significant to the improvement of water surrounding and safe drinking water.
The algae removal technology of current employing mainly contains air supporting, micro-filtration, contact percolation, adds several modes such as oxygenant.The method for pre-oxidizing wherein generally adopted is prechlorination technique.Although prechlorination can strengthen the efficiency except algae, in chlorination process, in chlorine and water, the organism effect of higher concentration generates the multiple harmful side products such as haloform, and the use of this technique is subject to more and more national restriction.And abroad though some developed countries adopt ozone oxidation good except algae effect, invest too large, running cost is high, is difficult to use in developing country.Potassium permanganate is a kind of strong oxidizer, utilizes its preoxidation algae pollution water body can remove micro quantity organic pollutant in water, enhanced coagulation, it is used in water treatment, has and invests the advantages such as little, efficient, easy to use.
Hu Yinghui etc. carry out modification with filtering the filtrate obtained after flyash acid activation to chitosan, prepare a kind of novel flocculant, treatment research is carried out with the landscape water body of this flocculation agent to Shanghai City park for peace, crane park, Lu Xun Park, river, Zhangwu road, and adopt Potassium Permanganate Preoxidation, strengthen flocculating effect, except algae efficiency can reach more than 90% (being published in water technology, 2010,36 (70): 50-52).Need before this modified chitosan flocculant concentration to use the potassium permanganate of 1mg/L to polluted-water preoxidation 1 hour, and also need 250r.min after adding flocculation agent
-1rapid stirring 3min, 30r.min
-1low rate mixing 10min, latter quiet heavy 1 hour.Complicated operation, uses inconvenience, affects its practical value.
Summary of the invention
The present invention is directed to prior art deficiency, propose a kind of frond rapid subsidence that can make made for starting material with chitosan, fly ash autoclaved brick powder and also effectively remove the algicide of algae;
Meanwhile, propose this algicide of a kind of application and carry out effectively except the method for algae, around preoxidation, coagulation and sedimentation three processes, utilize this algicide fast except algae, frond rapid subsidence can be made.
The technical solution adopted in the present invention:
Frond is flocculated and an algicide for rapid subsidence, containing chitosan, fly ash autoclaved brick powder, described algicide, with weight part content meter, containing chitosan 3.75 ~ 30 parts, 80 ~ 160 200 ~ 1000 parts, object fly ash autoclaved brick powder; The every weight part unit of chitosan is in g, and described chitosan, in L, is the HCl solubilize of 0.4% ~ 2% by 1 ~ 5 parts by volume concentration, then adds fly ash autoclaved brick powder, make described algicide by hydrochloric acid parts by volume unit.
Described fly ash autoclaved brick powder, is obtained by following mode:
First the coal ash autoclaved fragment of brick that construction site is discarded is pulverized and sieved, obtain 80 ~ 160 object powder, then pre-treatment is carried out to it, the organism contained by removal, obtain fly ash autoclaved brick powder;
Then the H of 20 ~ 40% is used
2o
2the fly ash autoclaved brick powder obtained is cleaned;
Finally, repeatedly clean fly ash autoclaved brick powder with deionized water, outwell supernatant liquid filtering, in the oven for drying of 50 ~ 60 DEG C of temperature.
Frond is flocculated and the algae-removing method of rapid subsidence, makes algicide with chitosan, fly ash autoclaved brick powder, and potassium permanganate is combined and is carried out except algae,
First a certain amount of potassium permanganate is put in algae pollution water body, preoxidation 0 ~ 50 minute;
Add fly ash autoclaved brick powder by after chitosan diluted hydrochloric acid dissolution again, make algicide;
Then a certain amount of algicide is added in the water body of algae pollution, leaves standstill, after frond is flocculated, be deposited to the bottom.
Described algae-removing method, potassium permanganate is 0.9g:1000L with the mass/volume ratio of algae pollution water body.
When described algicide is applied in the process purifying algae pollution water body: the volume ratio of the consumption of staying water and algicide is: 100:2.4 ~ 4.8.
Beneficial effect of the present invention:
1, the chitosan, the fly ash autoclaved brick powder that use of the present invention is all nontoxic, although employ rare HCl in algicide to dissolve chitosan, does not cause the change of water body significantly pH value within the scope of above-mentioned dosage.Can directly adding this algicide add potassium permanganate in the water body of algae pollution after, and without the need to stirring, directly quietly heavy frond within 1 hour, namely can be made to flocculate sink under water, more be convenient to use in water body in the wild, little on the impact of environment, non-secondary pollution.
2, without the need to stirring when algicide of the present invention uses, after adding, in quiet heavy 1 hour, frond can be made to be settled down to the bottom, being applicable to be that the Small-scale Landscape Water Bodies of sociales is except algae with blue-green algae.The method is safe and reliable, and except algae is thorough, speed is fast, algicide consumption is little and without the need to stirring, algae can be made to be deposited to the bottom, control algal bloom safely and effectively, and keep the water surface clean, water body is as clear as crystal, does not affect water body attractive in appearance.
3, algicide of the present invention, uses fly ash autoclaved brick discarded on construction site to make fly ash autoclaved brick powder, achieves utilization of waste material, be conducive to environmental protection and resources conservation.
Accompanying drawing explanation
Fig. 1 is the influence curve figure of Potassium Permanganate Preoxidation time to alga-killing rate;
Fig. 2 is Potassium Permanganate Preoxidation and is not oxidized the influence curve figure of lower algicide addition to alga-killing rate.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
The present invention makes frond flocculate and the algicide of rapid subsidence, containing chitosan, fly ash autoclaved brick powder, and described algicide, with weight part content meter, containing chitosan 3.75 ~ 30 parts, 80 ~ 160 200 ~ 1000 parts, object fly ash autoclaved brick powder; The every weight part unit of chitosan is in g, and described chitosan, in L, is the HCl solubilize of 0.4% ~ 2% by 1 ~ 5 parts by volume concentration, then adds fly ash autoclaved brick powder, make described algicide by hydrochloric acid parts by volume unit.
Embodiment 1
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, the every weight part unit of chitosan is in g, hydrochloric acid parts by volume unit is in L, containing chitosan 3.75 ~ 10 parts, 800 ~ 1000 parts, fly ash autoclaved brick powder, be the HCl solubilize of 1% by 1 ~ 3 parts by volume concentration by described chitosan, then add fly ash autoclaved brick powder.
Embodiment 2
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, containing chitosan 3.75 ~ 10 parts, 200 ~ 400 parts, fly ash autoclaved brick powder, adds 80 ~ 160 object fly ash autoclaved brick powder after being dissolved by chitosan with the HCl that 1 ~ 2 parts by volume concentration is 0.4%.
Embodiment 3
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, containing chitosan 3.75 ~ 10 parts, 400 ~ 800 parts, fly ash autoclaved brick powder, adds 80 ~ 160 object fly ash autoclaved brick powder after being dissolved by chitosan with the HCl that 1 ~ 2 parts by volume concentration is 0.7%.
Embodiment 4
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, and containing chitosan 10 ~ 20 parts, chitosan is add 80 ~ 160 object fly ash autoclaved brick powder after the HCl dissolving of 1% by 1 ~ 2 parts by volume concentration by 400 ~ 800 parts, fly ash autoclaved brick powder.
Embodiment 5
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, containing chitosan 10 ~ 20 parts, described chitosan is add 80 ~ 160 object fly ash autoclaved brick powder after the HCl solubilize of 0.7% by 4 ~ 5 parts by volume concentration by 800 ~ 1000 parts, fly ash autoclaved brick powder.Obtained described algicide.
Embodiment 6
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, and containing chitosan 10 ~ 20 parts, chitosan is add 80 ~ 160 object fly ash autoclaved brick powder after the HCl dissolving of 0.4% by 2 ~ 3 parts by volume concentration by 200 ~ 400 parts, fly ash autoclaved brick powder.
Embodiment 7
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, and containing chitosan 20 ~ 30 parts, chitosan is add 80 ~ 160 object fly ash autoclaved brick powder after the HCl dissolving of 1% by 2 ~ 3 parts by volume concentration by 400 ~ 800 parts, fly ash autoclaved brick powder.
Embodiment 8
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, containing chitosan 20 ~ 30 parts, 800 ~ 1000 parts, fly ash autoclaved brick powder, adds 80 ~ 160 object fly ash autoclaved brick powder after being dissolved by chitosan with the HCl that 4 ~ 5 parts by volume concentration are 1.5%.
Embodiment 9
The frond that makes of the present embodiment flocculates and the algicide of rapid subsidence, and containing chitosan 20 ~ 30 parts, chitosan is add 80 ~ 160 object fly ash autoclaved brick powder after the HCl dissolving of 2% by 1 ~ 2 parts by volume concentration by 200 ~ 400 parts, fly ash autoclaved brick powder.
Fly ash autoclaved brick powder in foregoing embodiments, is obtained by following mode:
First the coal ash autoclaved fragment of brick that construction site is discarded is pulverized and sieved, obtain 80 ~ 160 object powder, then pre-treatment is carried out to it, the organism contained by removal, obtain fly ash autoclaved brick powder;
Then the H of 20 ~ 40% is used
2o
2the fly ash autoclaved brick powder obtained is cleaned;
Finally, repeatedly clean fly ash autoclaved brick powder with deionized water, outwell supernatant liquid filtering, in the oven for drying of 50 ~ 60 DEG C of temperature.
In the process that fly ash autoclaved brick powder is cleaned, first fly ash autoclaved brick powder is put into thermostat water bath and heat, slowly add H subsequently
2o
2, limit edged stirs; Question response completely and no longer include heat release and gas when emerging, stops adding H
2o
2, continue heating in water bath half an hour.
Embodiment 10
Present embodiment discloses application of aforementioned algicide makes frond flocculate and the algae-removing method of rapid subsidence, makes algicide with chitosan, fly ash autoclaved brick powder, and potassium permanganate is combined and carried out except algae, makes frond rapid subsidence and effectively except algae, the steps include:
First a certain amount of potassium permanganate is put in algae pollution water body, preoxidation 0 ~ 50 minute;
Add fly ash autoclaved brick powder by after chitosan diluted hydrochloric acid dissolution again, make algicide;
Then a certain amount of algicide is added in the water body of algae pollution, leaves standstill, after frond is flocculated, be deposited to the bottom.
Described algae-removing method, potassium permanganate is 0.9g:1000L with the mass/volume ratio of algae pollution water body.
The application of algicide in the process of purification algae pollution water body: the volume ratio of the consumption of staying water and algicide is: 100:2.4 ~ 4.8.
Potassium permanganate has been widely used in, as oxygenant in Drinking Water process, to pollute water quality.Potassium permanganate has very strong preoxidation effect to algae, can prevent algae flco releasing oxygen and floating under photosynthesis.
Chitosan and the flocculation of fly ash autoclaved brick powder make frond sedimentation, but do not make frustule deactivation, the releasing oxygen thus frond is floated again under photosynthesis of the flco alive after precipitation; Potassium permanganate makes its inactivation when not destroying frustule, and in addition, the hydrated manganese dioxide that Potassium Permanganate Preoxidation produces improves the settleability of frustule; Chitosan-coated is at fly ash autoclaved brick powder surface, macromolecular chain is wrapped in around fly ash autoclaved brick powder, the specific surface area of chitosan is increased, add the contact of chitosan with algae, and make fly ash autoclaved brick powder surface positively charged, both by the bonding bridging action flocculation frustule of chitosan, can be condensed electronegative frustule by the change that fly ash autoclaved brick powder surface is electrical again, and make the flocculation of modified fly ash autoclaved brick powder remove algae ability and significantly improve.This flocculation agent is more existing has reported that flocculation agent obviously shortens the Potassium Permanganate Preoxidation time when applying, and the shortest can be 0 minute, and without the need to stirring, and is more convenient to apply in water body in the wild.
If following table 1 is for algicide is except algae effect comparison:
In table 1, chitosan dosage is 5mg, and the hydrochloric acid consumption of 0.7% is 5 mL, and 120 order fly ash autoclaved brick powder consumptions are 0.4 g, and experiment algae pollution water body is 25 mL.
As can be seen from Table 1 when without potassium permanganate oxidation, only add 1 mL algicide, alga-killing rate is 88.40%; When adding algicide again after the Potassium Permanganate Preoxidation increasing 0.9mg/L, alga-killing rate can be increased to 97.84%, as can be seen here, Potassium Permanganate Preoxidation can increase algicide except algae effect.When not containing fly ash autoclaved brick powder in algicide, alga-killing rate is 28.06%; When not chitosan-containing in algicide, only with ultrapure water and fly ash autoclaved brick powder replace algicide except alga-killing rate during algae be 24.93%, result shows that algicide of the present invention under the acting in conjunction of chitosan and fly ash autoclaved brick powder, frond flocculate and is deposited to the bottom.
Fig. 1 is the influence curve figure of Potassium Permanganate Preoxidation time to alga-killing rate.Algicide preoxidation time of the present invention short (0 minute can be as short as) as can be seen from Figure, without the need to stirring after adding algicide, having the advantages such as efficient, energy-saving and environmental protection, and frond rapid subsidence can be made to water-bed, is a kind of method that comparatively ideal algicide makes algae sedimentation.
Be respectively Potassium Permanganate Preoxidation shown in Fig. 2 and be not oxidized the influence curve figure of lower algicide addition to alga-killing rate.As can be seen from Figure when algicide addition is identical, adopt Potassium Permanganate Preoxidation, alga-killing rate can exceed 3 ~ 10 percentage points relatively.
Below in conjunction with the result of study in laboratory, the present invention is described in more detail:
Embodiment 11(experiment 1)
(can dissolve constantly stirring all to be dissolved in hydrochloric acid soln to chitosan with glass stick in the hydrochloric acid soln of 11mg chitosan 5mL 1% by ultrasonic wave), add 1g 120 order fly ash autoclaved brick powder and make algicide, getting 1mL algicide adds in the water body of the Potassium Permanganate Preoxidation 25 mL algae pollutions of 50 minutes of 0.9mg/L, leave standstill 1h, algae is deposited to the bottom, water body is limpid, and detecting its alga-killing rate can reach 98.9%.
Embodiment 12(experiment 2)
5mg chitosan is added in the hydrochloric acid soln of 5mL 1% constantly to stir all to be dissolved in hydrochloric acid soln to chitosan with glass stick and (can dissolve by ultrasonic wave).Add 0.4g 120 order fly ash autoclaved brick powder again, be constantly stirred to glass stick and mix.Add 1mL algicide immediately add the potassium permanganate of 0.9mg/L in the water body of 25 mL algae pollutions after, leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 99.7%.
Embodiment 13(experiment 3)
(can dissolve constantly stirring all to be dissolved in hydrochloric acid soln to chitosan with glass stick in the hydrochloric acid soln of 11mg chitosan 5mL 1% by ultrasonic wave), adding 1g 160 order fly ash autoclaved brick powder, using ultrasonic wave hydrotropy.Getting 1mL algicide adds in the water body of the Potassium Permanganate Preoxidation 25 mL algae pollutions of 50 minutes of 0.9mg/L, and leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 99.3%.
Embodiment 14(experiment 4)
5mg chitosan is added in the hydrochloric acid soln of 5mL 0.4% constantly to stir to chitosan with glass stick and all dissolve (can dissolve by ultrasonic wave).Add 0.4g 120 order fly ash autoclaved brick powder, be constantly stirred to glass stick and mix.Add 1mL algicide immediately add the potassium permanganate of 0.9mg/L in the water body of 25 mL algae pollutions after, leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 98.6%.
Embodiment 15(experiment 5)
7mg chitosan is added in the hydrochloric acid soln of 5 mL 2% constantly to stir all to be dissolved in hydrochloric acid soln to chitosan with glass stick and (can dissolve by ultrasonic wave), add 0.6g 80 order fly ash autoclaved brick powder, use ultrasonic wave hydrotropy.Getting 1mL algicide adds in the water body of the Potassium Permanganate Preoxidation 25 mL algae pollutions of 50 minutes of 0.9mg/L, and leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 94.5%.
Embodiment 16(experiment 6)
15mg chitosan to be added in the hydrochloric acid soln of 5 mL 2% constantly to stir all to be dissolved in hydrochloric acid soln to chitosan and (can dissolve by ultrasonic wave), add 0.6g 120 order fly ash autoclaved brick powder, use ultrasonic wave hydrotropy.Getting 1 mL algicide adds in the water body of the Potassium Permanganate Preoxidation 25 mL algae pollutions of 30 minutes of 0.9mg/L, and leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 98.5%.
Embodiment 17(experiment 7)
20mg chitosan to be added in the hydrochloric acid soln of 5mL 1% constantly to stir all to be dissolved in hydrochloric acid soln to chitosan and (can dissolve by ultrasonic wave), add 1.0g 120 order fly ash autoclaved brick powder, use ultrasonic wave hydrotropy.Getting 1 mL algicide adds in the water body of the Potassium Permanganate Preoxidation 25 mL algae pollutions of 50 minutes of 0.9mg/L, and leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 94.7%.
Embodiment 18(experiment 8)
25mg chitosan to be added in the hydrochloric acid soln of 5mL 2% constantly to stir all to be dissolved in hydrochloric acid soln to chitosan and (can dissolve by ultrasonic wave), add 0.4g 120 order fly ash autoclaved brick powder, use ultrasonic wave hydrotropy.Add 1mL algicide immediately add the potassium permanganate of 0.9mg/L in the water body of 25 mL algae pollutions after, leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 99.3%.
Embodiment 19(experiment 9)
20mg chitosan to be added in the hydrochloric acid soln of 5 mL 1.5% constantly to stir all to be dissolved in hydrochloric acid soln to chitosan and (can dissolve by ultrasonic wave), add 0.6g 120 order fly ash autoclaved brick powder, use ultrasonic wave hydrotropy.Getting 1 mL algicide adds in the water body of the Potassium Permanganate Preoxidation 25 mL algae pollutions of 50 minutes of 0.9mg/L, and leave standstill 1h, algae is deposited to the bottom, and water body is limpid, and detecting its alga-killing rate can reach 98.9%.
Claims (10)
1. one kind makes frond flocculate and the algicide of rapid subsidence, containing chitosan, fly ash autoclaved brick powder, it is characterized in that: described algicide, with weight part content meter, containing chitosan 3.75 ~ 30 parts, 80 ~ 160 200 ~ 1000 parts, object fly ash autoclaved brick powder; The every weight part unit of chitosan is in g, and described chitosan, in L, is the HCl solubilize of 0.4% ~ 2% by 1 ~ 5 parts by volume concentration, then adds fly ash autoclaved brick powder, make described algicide by hydrochloric acid parts by volume unit.
2. the frond that makes according to claim 1 flocculates and the algicide of rapid subsidence, it is characterized in that: containing chitosan 3.75 ~ 30 parts, 800 ~ 1000 parts, fly ash autoclaved brick powder, adds 80 ~ 160 object fly ash autoclaved brick powder after being dissolved by chitosan HCl.
3. the frond that makes according to claim 1 flocculates and the algicide of rapid subsidence, it is characterized in that: containing chitosan 3.75 ~ 30 parts, 200 ~ 400 parts, fly ash autoclaved brick powder, adds 80 ~ 160 object fly ash autoclaved brick powder after being dissolved by chitosan HCl.
4. the frond that makes according to claim 1 flocculates and the algicide of rapid subsidence, it is characterized in that: containing chitosan 3.75 ~ 30 parts, 400 ~ 800 parts, fly ash autoclaved brick powder, adds 80 ~ 160 object fly ash autoclaved brick powder after being dissolved by chitosan HCl.
5. the frond that makes according to claim 1 flocculates and the algicide of rapid subsidence, it is characterized in that: containing chitosan 10 ~ 20 parts, 400 ~ 800 parts, fly ash autoclaved brick powder, adds 80 ~ 160 object fly ash autoclaved brick powder after being dissolved by chitosan HCl.
6. the frond that makes according to any one of Claims 1 to 5 flocculates and the algicide of rapid subsidence, it is characterized in that: described fly ash autoclaved brick powder, is obtained by following mode:
First the coal ash autoclaved fragment of brick that construction site is discarded is pulverized and sieved, obtain 80 ~ 160 object powder, then pre-treatment is carried out to it, the organism contained by removal, obtain fly ash autoclaved brick powder;
Then the H of 20 ~ 40% is used
2o
2the fly ash autoclaved brick powder obtained is cleaned;
Finally, repeatedly clean fly ash autoclaved brick powder with deionized water, outwell supernatant liquid filtering, in the oven for drying of 50 ~ 60 DEG C of temperature.
7. the frond that makes according to claim 6 flocculates and the algicide of rapid subsidence, it is characterized in that: with the H of 30%
2o
2the fly ash autoclaved brick powder obtained is cleaned: the thermostat water bath that fly ash autoclaved brick powder puts into 50 DEG C is heated, slowly add the H of 30% subsequently
2o
2, limit edged stirs; Question response completely and no longer include heat release and gas when emerging, stops adding H
2o
2, continue heating in water bath half an hour.
8. make frond flocculate and the algae-removing method of rapid subsidence, make algicide with chitosan, fly ash autoclaved brick powder, and potassium permanganate is combined and is carried out, except algae, it is characterized in that:
First a certain amount of potassium permanganate is put in algae pollution water body, preoxidation 0 ~ 50 minute;
Add fly ash autoclaved brick powder by after chitosan diluted hydrochloric acid dissolution again, make algicide;
Then a certain amount of algicide is added in the water body of algae pollution, leaves standstill, after frond is flocculated, be deposited to the bottom.
9. the frond that makes according to claim 8 flocculates and the algae-removing method of rapid subsidence, it is characterized in that: the mass/volume of potassium permanganate and algae pollution water body is than being 0.9g:1000L.
10. the frond that makes according to claim 8 or claim 9 flocculates and the algae-removing method of rapid subsidence, and it is characterized in that, when described algicide is applied in the process purifying algae pollution water body, the volume ratio of the consumption of staying water and algicide is: 100:2.4 ~ 4.8.
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